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TESTB950 Release 2021-08-28
Send your 1.b4 games to me, please. Thank you! /Marek
Marek Trokenheim's homepage
(c) Marek Trokenheim


 

Starting the fight, you might as White
use a monkey – that's right,
but –
in spite of that sight – on b4 site –
I feel no fright
because...
my Black Queen's Knight might bite!

(Anker Aasum)
 

1.b4 Nc6
Aasum's defence

(...)

2.a3 f5 3.e3 (3.Bb2 Nf6=) 3...e6 (3...e5 4.Bb2 d6 5.b5=) 4.Nf3 (4.Bb2 Nf6+=) 4...Qf6 (4...Nf6 5.Be2+=) 5.Nc3 (5.d4 Be7+=) 5...Nge7 (5...e5 6.Bb2+=) 6.Bb2 Ng8 (6...e5 7.Bc4+=) 7.Be2+/– Bd6 8.0–0 Qg6 (8...Nge7!?+/–) 9.Nb5+– Be5?? (better is 9...Nf6+–) 10.Ne5 Ne5 11.Bh5 (11.Bh5 Kf8 12.Bg6 Ng6 13.Nc7+–) 1–0. Wall,Bill – Ahdoo, internet, 2001.

2.a3 g5 3.Bb2 (3.d4+=) 3...e5 (3...Nf6!?=) 4.b5+/– White gets in control 4...Na5 (4...Nd4 5.e3 Ne6 6.Be5+/–) 5.Be5 f6 (5...Nf6!?+/–) 6.Bc3+– Nc4 (6...c6 7.e4 d5 8.Qh5 Ke7 9.ed5 cd5 10.Nf3+–) 7.e4 Ne5?? (7...Nd6 8.Qh5 Ke7+–) 8.Be5 fe5 (8...h5 9.Bb2+–) 9.Qh5 Ke7 10.Qg5 Nf6 11.Qe5 Kf7 12.Bc4 d5 13.Bd5 Nd5 14.Qh8 Ne7 (14...Qf6 15.Qh7 Bg7 16.Qh5 Ke7 17.c3+– (17.Qd5 Qa1 18.Qc5 Kd8+–)) 15.Qh7 Bg7 16.Qh5 (16.Nc3 a6+–) 16...Ng6 (16...Kg8 17.Nc3+–) 17.Nc3 Qh4 (17...Bc3 18.dc3 Qe8 19.Qd5 Kg7 20.Ne2+–) 18.Qh4 Nh4 19.g3 Ng2 (19...Ng6 20.h4+–) 20.Kf1 Bh3 (20...Nh4 21.gh4 Be6+–) 21.Nh3 Bh6 22.Rd1 Re8 23.Kg2 Re4 24.Ne4 b6 25.Rhe1 (better is 25.Nhg5 Ke7+–) 25...Bg7 26.c4 (26.Neg5!? Kf8+–) 26...Bf8 27.a4 1–0. Woelfelschneider,Peter – Souquiere,Florence, FICGS, 2006.

2.Ba3 a5 3.h4?? (better is 3.b5 Ne5 4.e4+=) 3...ab4–/+ 4.Bb4?? (better is 4.Bb2–/+) 4...Nb4–+ 5.d4 d5 (5...Ra2?! 6.Ra2 Na2 7.c3–+) 6.g3 (6.c3 Na2 (6...Ra2?! 7.Ra2 Na2 8.Qa4 c6 9.Qa2–+) 7.Qb3 Nc1–+) 6...h5 (better is 6...Bf5 7.Nc3 Nc2 8.Kd2–+) 7.Nf3 (7.Qd2 e5 (7...Ra2?! 8.Ra2 Na2 9.c3–+; 7...Na2?! 8.Nc3–+) 8.c3 Nc6–+) 7...e6 (better is 7...Bf5 8.e4 de4 9.c3 ef3 10.cb4–+) 8.a3 Nc6 9.Qd2 Bd6 10.Ra2 Nf6 11.Qg5 Kf8 12.Nc3 (12.Bg2 Rh6–+) 12...Ba3 13.Nb1 (13.Kd1–+) 13...Rh6 (better is 13...Bb4!? 14.c3 Ra2 15.cb4–+) 14.Ne5?? (better is 14.Ra3 Ra3 15.Na3–+) 14...Rg6 (better is 14...Bb4 15.c3 Ra2 16.cb4 Qe7–+) 15.Ng6= fg6 (15...fg6 16.Ra3 Ra3 17.Na3 Qe7=) 0–1. Gwen – Maz, playchess.de, 2001.

2.Ba3 b5 3.Nc3 a6 4.d4 d5 5.e4 e6 6.e5 Bd7 (6...Nb4 7.Nb1 Qh4–/+) 7.Qf3? (better is 7.Nb1+=) 7...Nd4–+ (worse is 7...Bb4 8.Bb4 Nb4 9.Rc1–/+) 8.Qd3 c5! 9.bc5 Nf5 10.Nf3 Qa5 11.g4 Qa3 12.gf5 Bc5 (12...ef5?! 13.Nd5 Qc5 14.Bg2–/+) 13.fe6 Be6 14.Rb1 (14.Nd1 Qd3 15.cd3 d4–+) 14...b4 15.Ne2 Qa2 16.c3 (16.Nd2 Nh6 17.Nc1 Qa5–+) 16...bc3 (16...Nh6 17.Rd1–+) 17.Nc3 (17.Rc1 Qb2 18.Rb1 Qa3 19.Qc3 Qc3 20.Nc3 Bf5–+) 17...Qa3 (better is 17...Qf2 18.Kd1 Nh6–+) 18.Qd1?? (18.Nd4–+) 18...Qc3 19.Qd2 (19.Nd2 Qe5 20.Qe2 Qe2 21.Be2–+) 19...Qf3 (19...Qf3 20.Qe2 Qh1–+) 0–1. Andisch – Jalvarez, playchess.de, 2002.

2.Ba3 b6 3.b5= Na5 4.Nf3 Bb7 5.e3 Nf6 6.Nc3 d6 7.h3 e5 8.Be2 Be7 9.0–0 0–0 10.Qb1 c6 11.Qb4 Nd5 (better is 11...Re8+=) 12.Nd5+/– cd5 13.Ne5! de5 14.Qe7 Qc8? (better is 14...Qe7 15.Be7 Rfc8+/–) 15.Qf8+– (15.Qe5?! Nc4 16.Bc4 Re8+–) 15...Qf8 16.Bf8 Rf8 17.f4 ef4 18.Rf4 Re8 19.Bd3 d4 (19...Re5 20.Raf1 f6 21.a4+–) 20.Rd4 a6 (20...Bc8+–) 21.ba6 Bc8 22.Rb1 Nc6 23.Rb6 Nd4 (23...Na7+–) 24.a7 Be6 (24...Ne6 25.a8Q Bd7 26.Rb8 Rb8 27.Qb8 Nf8 28.Bh7 Kh7 29.Qf8+–) 25.Rb8 Kf8 26.a8Q Bd7 27.Re8 Be8 28.ed4 Ke7 29.Qa3 1–0. usingprogram (1965) – gekkis, kurnik, 2012.

2.Ba3 Nd4 3.e3 Nc6 4.d4 Nf6 5.Nf3 e6 6.Ng5 (6.b5 Ba3 7.Na3+= (worse is 7.bc6 Bb2 8.Nbd2 Ba1 9.cd7 Bd7 10.Qa1 c5–+)) 6...Ng4?? (6...Bb4 7.Bb4 Nb4+=) 7.h3?? (7.Qg4 Nb4 8.Kd1 Be7+–) 7...Qe7?? (better is 7...Ne3 8.fe3 Qg5–/+) 8.hg4?? (better is 8.Qg4 h6 9.Nf3 Nb4 10.Kd1+–) 8...f5 (8...f5 9.Rh7 Rh7 10.Nh7 d6+–). horsehold – Unicorn5, ChessWorld.net, 2013.

2.Ba3 e5 (--> 1.b4 e5 2.Ba3 Nc6).

2.Ba3 Nf6 3.d4 d5 4.Nf3 Ne4 5.Nc3?? (better is 5.b5 Na5 6.Nfd2=) 5...Nc3–+ 6.Qd3 Ne4 7.b5 Na5 8.e3 e6 (better is 8...Bf5!? 9.Qd1–+) 9.Bf8 Rf8 10.Ne5 Qf6 11.f3 (11.Qe2 Qe7 12.a3 f6–+) 11...Nd6 (better is 11...Qh4 12.Ke2 f6 13.fe4 fe5 14.Kd2 Nc4 15.Kc3–+) 12.Be2 Nac4 13.Nc4 Nc4 14.Qh7 (14.Qc3 e5–+) 14...g6 (better is 14...Ne3 15.c3 g6 16.Kf2–+) 15.0–0 (15.Qh6–+) 15...Rh8 16.Qh8 Qh8 17.Bc4 dc4 18.Rad1 (18.a4 a6–+) 18...Bd7 19.a4 f5 (better is 19...Qf8!? 20.Ra1 Qb4 21.Rfe1–+) 20.c3 0–0–0 21.e4 fe4 22.fe4 Qh7 (better is 22...e5 23.Rd2–+) 23.d5 (23.e5 g5 24.Rf2 Qe4–+) 23...ed5 24.ed5 (24.Rd5 Rh8 25.h3 Bh3–+) 24...Rh8 25.h3 Bh3! 26.gh3 Qh3 27.Kf2 (27.Rd2 Qh1 28.Kf2 Rf8 29.Ke3 Qf1 30.Kd4 b6 31.Re2 Qe2 32.d6 Rf4 33.Kd5 Qe4) 27...Qh2 28.Ke3 Re8 (28...Qe5 29.Kd2 Rh2 30.Rf2 Rf2 31.Kc1 Qc3 32.Kb1 Qb2) 29.Kd4 Qh4 (29...b6 30.Kc4 Qa2 31.Kd4 Qe2 32.Rf4 Qd1 33.Kc4 Qa4 34.Kd3 Qf4 35.d6 Qf1 36.Kc2 Re2 37.Kb3 Qb1 38.Kc4 Re4 39.Kd5 Qd3 40.Kc6 Qd6) 30.Kc5–+ b6 31.Kb4 Kb7 (31...Qh2 32.d6 a5 33.ba6 Qb2 34.Kc4 Qa2 35.Kb4 Re4 36.Rd4 c5 37.Kb5 cd4 38.Kb6 Qb3 39.Kc6 Qc4 40.Kb6 Qf1 41.d7 Kd7 42.c4 Re6 43.Kc5 Qf8 44.Kd4 Qf6 45.Kd3 Qf3 46.Kd4 Qe3 47.Kd5 Rd6) 32.Rd4 (32.Ra1 Qh2 33.Kc4 Qc2–+) 32...Re4 (32...Qe7 33.d6 Qe2 34.Ra1–+) 33.Kc4 Rd4 34.cd4 g5 (34...Qh2 35.Kd3–+) 35.Rf7 Qh3 36.d6 (36.Rg7 Qf1 37.Kc3 Qf3 38.Kc2–+) 36...Qe6 (36...Qe6 37.Kd3 Qf7–+) 0–1. Hammi.Bogart – Geordiedazza, ChessWorld.net, 2003.

2.Ba3 g6 3.Nc3 (3.Bb2 Nf6 4.b5 Na5=) 3...Bg7 (better is 3...e5+=) 4.Ne4? (4.e4!?=) 4...d5 (better is 4...Ba1!? 5.Qa1 e5–+) 5.Nc3–/+ Nf6 6.Nf3 (6.b5 Nd4+=) 6...0–0 (6...Ne4 7.Bb2–/+) 7.e3 (7.b5 Na5+=) 7...Bg4 (7...Ne4 8.Bb2 Nb4 9.Qb1–/+) 8.h3 Be6 (8...Bf3 9.gf3 a6 10.b5 ab5 11.Nb5–/+) 9.Ng5 (9.b5 Nb8+=) 9...h6 (9...Bf5!?+=) 10.Ne6= fe6 11.Bd3 Ne5 12.0–0 (12.Be2 Nc4 13.Bc4 dc4=) 12...Nd3+= 13.cd3 c6 14.Na4 (14.d4 Qd6+=) 14...b6 (14...e5 15.Nc5 Qc8 16.Qc2+=) 15.Rc1 Rc8 16.d4 Nd7 (16...Kh7 17.d3=) 17.Qg4= Rf6 18.Nc3 h5 (18...e5 19.b5 ed4 20.Nd5 cd5 21.Be7 Qe7 22.Rc8 Nf8 23.Qd4=) 19.Qg3+= Nf8 20.b5 Qe8 21.e4 (21.bc6!? Rc6 22.Rc2+=) 21...cb5= 22.ed5 Rf5 23.Qe3 (23.d6 ed6 24.Ne4 Rc1 25.Rc1 Rd5 26.Nd6 Qd7+=) 23...e5 (23...Rc4 24.de6 Bd4 25.Qe2+=) 24.Qe2 (24.de5 Re5 25.Qd3 Qd7+=) 24...a6 25.d6 ed6 26.Bd6 (26.d5 Qf7=) 26...ed4+= 27.Ne4 Rc1 28.Rc1 Ne6 29.g3 (29.Re1 Qc6+=) 29...Qd7 30.Bb4? (30.Qd3 Rd5+=) 30...a5 (better is 30...d3 31.Qe3 Nd4–+) 31.Nd6?? (31.Bd6–/+) 31...ab4 (better is 31...Re5 32.Qd3 ab4–+) 32.Nf5+= gf5 33.Qh5 Nc5 34.Re1 Ne4 (34...Kf8 35.Kg2+=) 35.d3= Nf6 36.Qg5 Qf7 (36...Nh7 37.Qe7 Nf6 38.Qb4=) 37.Re2 (37.Qf5 Qa2 38.Qb5 Qb3=) 37...Nd5 (37...Nh7 38.Qe7 Bf8 39.Qf7 Kf7=) 38.h4 (38.Re5! Nc3 39.Rf5=) 38...Qf6 (38...f4 39.g4+=) 39.Re8 Kf7 (39...Kf7 40.Qh5 Qg6+=). bartosz – chessdeviant (2245), net–chess.com, 2007.

2.Bb2 a6 (--> 1.b4 a6 2.Bb2 Nc6).

2.Bb2 b6 (--> 1.b4 b6 2.Bb2 Nc6).

2.Bb2 Nb8 3.a3 e6 4.c4 Be7?? (4...d5 5.cd5 ed5 6.Nf3=) 5.e3?? (5.Bg7 Bf6 6.Bh8 Bh8+–) 5...d5?? (5...Nf6!?=) 6.cd5?? (6.Bg7 Bf6 7.Bh8 Bh8+–) 6...ed5? 7.Nf3?? Nd7?? 8.d3?? Ngf6= 9.Be2 0–0 10.Nbd2 Ne8 11.0–0 f6 12.h3 Ne5 13.Ne5+/– fe5 14.Be5 Bf6 15.Bf6 Rf6 16.d4 Nd6 17.Nf3 Qe7 18.Ne5 Bd7 19.Qd2 Be6 20.Bf3 Raf8 21.Rfc1 Bf5? 22.Qc3 c6+/– 23.a4 Ne4 24.Be4 Be4 25.Rf1 Qe8 26.Qd2 Qh5 27.Rac1 Qg5+/– 28.Ng4 Rg6 29.f3 Bf5 30.e4?? de4 31.fe4?? Bg4 32.Qg5 Rf1 33.Rf1 Rg5 34.hg4 Rg4 35.Re1 Kf7 36.e5?? Ke6?? 37.Rd1= Kd5 38.Kf2 Rg6 39.Ke3?? Re6?? 40.g4 b6 41.a5 ba5? 42.ba5 g5?? 43.Rc1+– h6 44.Rc5 1–0. Fournier,Frederic (2040) – Shamanzeinju (1865), Active, 2005.

2.Bb2 d6 (--> 1.b4 d6 2.Bb2 Nc6).

2.Bb2 Ne5?? 3.Be5+– d6 4.Bb2 e5 5.a3 Bd7 6.e3 Bc6 (6...Nf6 7.Nf3+–) 7.Nf3 Bf3 (7...Nf6 8.Nc3+–) 8.Qf3 (worse 8.gf3 Qe7+–) 8...Qf6 (8...c6+–) 9.Qb7 Rd8 (9...Qd8+–) 10.Bb5 Ke7 11.0–0 (11.Nc3!? Ke6 12.Bc4 d5 13.Nd5 Qh4 14.Qc7 Kf5+–) 11...Qe6 12.Qc7 Rd7 13.Bd7 Qd7 14.Qd7 Kd7 15.c4 Ne7 16.d4 f6 17.Nc3 White intends d5 17...e4 (17...Ng6 18.Rfd1+–) 18.Ne4 f5 19.Ng5 g6 (19...h6 20.Nf3+–) 20.d5 Bh6 (20...Rg8 21.Nh7 Bg7 22.Bg7 Rg7 23.Nf8 Ke8 24.Ne6+–) 21.Nf7 (21.Bh8 Bg5 22.Rfd1 Ng8+–) 21...Rf8 (21...Rc8 22.Nh6 Rc4 23.Rfd1+–) 22.Nh6 Nd5 23.cd5 Kc7 24.Rac1 Kb6 25.a4 a5 26.Bd4 Ka6 27.b5 (27.Rc7 ab4 28.Ra7) 27...Kb7+– 28.Rc6 Rd8 29.Rfc1 (29.Nf7 Rd7 30.Rfc1 Rf7 31.Rb6 Ka7 32.Rc8 Rc7 33.Rc6 Kb7 34.R6c7) 29...f4 (29...Rd7 30.Rb6 Ka7 31.Rc8 Rc7 32.Rc6 Kb7 33.R6c7) 30.Rc7 (30.Nf7 Rd7 31.Rb6 Ka7 32.Rc8 Rc7 33.Rc6 Kb7 34.R6c7) 30...Kb8 31.Nf7 Re8 (31...fe3 32.Nd8 ef2 33.Kf2 h6 34.Rc8) 32.e4! f3 (32...Re4 A deflection 33.Rc8 A beautiful mate combination) 33.g3 (33.Nd6 fg2 34.Rc8 Rc8 35.Rc8) 33...Re4 (33...h6 34.Nd6 Rd8 35.Rc8 Rc8 36.Rc8) 34.Rc8 Kb7 35.R1c7 (35.Nd6) 1–0. BeepBeepImAJeep (2675) – JALR (1615), lichess.org, 2017.

2.Bb2 e6 (--> 1.b4 e6 2.Bb2 Nc6).

2.Bb2 Nf6 (--> 1.b4 Nf6 2.Bb2 Nc6).

2.b5 e6?? 3.bc6+– bc6 (3...dc6 4.e4+–) 4.Bb2 (4.e4 Rb8+–) 4...Rb8 5.Qc1 (better is 5.Bc3+–) 5...Bc5?? (5...Nf6+–) 6.Bg7 Bf2 (6...Bd4 7.Bd4 f6 8.Ba7+–) 7.Kf2 Qh4 (7...Nf6 8.Bh8 Ne4 9.Kf3+–) 8.g3 Qg4 (8...Qe7 9.Bh8 Nf6 10.Nf3+–) 9.Bh8 Qf5 10.Nf3 (10.Ke1 Nf6+–) 10...Qc5 11.Bd4 (11.d4 Qf5+–) 11...Qf5 12.Bg2 (12.Ba7 Ra8 13.Qb2 d6+–) 12...Nh6 13.Rf1 (13.h3 a6+–) 13...Ng4 14.Kg1 c5 15.Nh4 (15.Ne5! Qg5 16.Ng4 Qg4 17.Bc5 a6+–) 15...Qg5 16.Bh8 Ba6 17.d3 (17.h3 Ne5 18.Qa3 Rb6+–) 17...Ne3 (17...Qe3 18.Qe3 Ne3 19.Rc1+–) 18.Bf6 Qh5 19.Qe3 Bb7 20.Rf5 (20.g4 Qh4 21.Bh4 f6 22.Qf4 Ba8 23.Qf6 Bg2 24.Qe7) 20...Qg4 21.Rg5 Qb4 22.Rc5 (22.Rg8) 22...Qe1 23.Bf1 Ba6 24.Bc3 (24.Qg5 Qf2 25.Kf2 d6 26.Qg8 Kd7 27.Qf7 Kc8 28.Qc7) 24...Rb6 25.Be1 (25.Be1 Rb7 26.Bg2+–) 1–0. Trkn – Phil C, itsyourturn.com, 2001.

2.b5 Nf6?? 3.bc6+– bc6 4.Bb2 Ba6 5.d3 Nd5 (5...d6 6.Bf6 ef6 7.Nf3+–) 6.Nf3 Qb8 7.Qc1 h6 8.e4 Nb4 (8...Nf6 9.Be2+–) 9.Be2 (better 9.a3+–) 9...g5 (9...Bb7+–) 10.a3 (better 10.Bh8 c5+–) 10...Rg8 11.ab4 Qb4 12.Nbd2 Bb5 (12...Qb7 13.Rb1+–) 13.0–0 (13.c4!? g4 14.Ne5 Bg7 15.cb5 cb5 16.Qc7 Qb2 17.Ra7 Rd8 18.Bg4 Be5 19.Bd7 Kf8 20.Qd8 Kg7 21.Qe7 Bc3+–) 13...Bg7 14.Bg7 Rg7 15.Rb1 (15.c3 Qc5 16.d4 Qb6+–) 15...Qc5 (15...Qc3 16.Rb3 Qf6 17.c4+–) 16.Rb5! cb5 (16...Qb5 17.Qa3 Combination; 16...cb5 17.Qb2 Combination) 17.Nc4! bc4 18.dc4 (18.d4!? Qd6 19.Bc4+–) 18...a5 19.Qe3?? (better 19.Qb2 f6 20.Nd4+=) 19...Qe3–/+ 20.fe3 a4 21.Nd4 a3 (better 21...c5!? 22.Nb5 Kd8–/+) 22.Ra1 a2 23.Nb5 c6?? (23...Kd8 24.Nc3=) 24.Nc3 (better 24.Nc7 Kf8 25.Na8+–) 24...Kd8 (24...c5 25.Ra2 (worse 25.Na2 e5–/+) 25...Ra2 26.Na2=) 25.Ra2+= (worse 25.Na2 g4 26.c5 Rg5=+) 25...Ra2 26.Na2 Kc7 27.Nc3 e5 28.Kf2 d6 29.Bg4 f6 30.Ne2 Rg8 31.Bf5 Ra8 32.Kf3 c5 (32...Ra2!?+=) 33.Nc3+– Ra1 (33...Kd8 34.Nd5+–) 34.Nd5+– Kc6 35.Nf6 Rh1 36.Ng4 (better 36.h3!?+–) 36...h5+– 37.Nf6 g4? (better 37...Rh2 38.Nh7 g4 39.Kg3 Rh1+–) 38.Kg3+– Rc1 (38...h4 39.Kh4 Rh2 40.Kg3+–) 39.h3 (better 39.Nh5!? Rc2 40.Be6 Re2+–) 39...Rc2 40.hg4 (40.Nh5?! gh3 41.gh3 Rc4+–) 40...h4? (40...hg4 41.Be6 Kc7+–) 41.Kh4 Rg2 42.Kg5 (better 42.g5 Rh2 43.Kg3 Rh1+–) 42...Rc2 43.Kg6 (43.Kh6 Rh2 44.Nh5 Rc2+–) 43...Rc4 44.g5 Rc3 (44...Rb4 45.Kh5 Rb8 46.g6+–) 45.Kf7 1–0. avz81 – hojeseramelhor, lichess.org, 2018.

2.c3 d5 (--> 1.b4 d5 2.c3 Nc6).

2.c3 d6 3.e3 Bd7 4.Nf3 a6 5.d4 Na7 (5...e5 6.d5 Nce7 7.e4=) 6.Bd3 c6 7.Nbd2 e5 8.de5 de5 9.Qc2 f6 10.0–0 Be7 (10...g6 11.Rd1+/–) 11.Bb2 (11.Bh7 Qc7+–) 11...Kf8 (11...g6 12.Rad1+/–) 12.Rad1 Qb6 13.Rfe1 Bd8 (13...c5 14.a3+/–) 14.Ne4 Qc7 15.Ned2?? (15.Nc5!? Bc8+–) 15...Ne7 (15...Qb6 16.Bh7 Be6 17.Nb3+–) 16.Be4 (16.a4 c5+/–) 16...b5? (16...f5 17.c4 fe4 18.Be5+/–) 17.a3 (better is 17.Nb3+–) 17...c5?? (better is 17...f5 18.c4 fe4 19.Be5 Qc8 20.Ne4 Bf5+/–) 18.Ba8+– Bc6 (18...cb4 19.ab4 Nec6 20.Qb3+–) 19.Bc6 Nac6 20.Ne4 Nb4 (20...c4+–) 21.cb4 cb4 22.Qc7 (22.Nc5 Ke8 23.ab4 Qc6+–) 22...Bc7 23.Rd7 ba3 (23...Bb6+–) 24.Ba3 Kf7 25.Be7 1–0. Fournier,Frederic (1780) – thenewone (1750), Active blind, 2011.

2.c3 e5 (--> 1.b4 e5 2.c3 Nc6).

2.c3 e6 (--> 1.b4 e6 2.c3 Nc6).

2.Nc3 Nb4 3.Rb1 e6 4.e4 –/+.

2.Nc3 e6 3.e3 (3.b5 Ne5=) 3...d5 (3...Bb4 4.Bb2–/+) 4.Ba3 (4.b5!? Na5 5.d4=) 4...Nb4 (better is 4...a5 5.b5 Ba3 6.bc6 bc6–/+) 5.Qg4?? (better is 5.Nf3–/+) 5...Nc2–+ 6.Ke2 (6.Kd1 Na3 7.Nf3 Nf6 8.Qa4 c6–+) 6...Na1 (6...Na3 7.Rc1–+) 7.Bf8 Ne7 (better is 7...Kf8 8.Qb4 c5 9.Qc5 Ne7–+) 8.Bg7 (8.Be7 Ke7 9.Qg7 Nc2–+) 8...Rg8 9.Bf6?? (9.Qg5–+) 9...Rg4 10.Nh3 Bd7 (10...Rg6 11.Be7 Qe7 12.Nf4–+) 11.Ng5 h6 12.Nh7 Bc6 (12...Rb4 13.Kd1–+) 13.f4 Qd7 (13...Rg6 14.Kd1 d4 15.Bd4–+) 14.f5 Nf5 (better is 14...ef5 15.Nb1 Nc2 16.Kd1–+) 15.h3 Ng3 (15...Rg6 16.Kf2–+) 16.Kd1 Nf1 (16...d4 17.Bd4 Rf4 18.Ne2 Ba4 19.Kc1 Qc6 20.Nc3 Rd4 21.ed4 Nh1 22.Kb2 Qb6 23.Ka1 Qd4 24.Bd3–+) 17.Rf1 (17.hg4 Ba4 18.Kc1 Bc2 19.Rh6 Qd6–+) 17...Ba4 (better is 17...Rg2 18.Bg5 Ba4 19.Kc1–+) 18.Na4 Qa4 19.Ke2 Rg2 20.Rf2 Rg1 0–1. GT (2000) – Munkwitz,Wolfgang (1825), remoteschach.de, 2003.

2.Nc3 f5 3.a4 (3.b5 Ne5=) 3...a5 (3...Nb4 4.e4+=) 4.Ra2 (4.b5!? Nb4 5.Nf3=) 4...d5 (4...ab4 5.Nb5–/+) 5.Rb2? (5.b5 Nb4 6.Rb2 d4+=) 5...Rb8?? (better is 5...ab4 6.Na2 e5–+) 6.g4?? (better is 6.b5 Ne5 7.e3=) 6...d4 (6...d4 7.Nb5 ab4 (worse is 7...Nb4 8.c3+=) 8.gf5 Bf5–/+) 0–1. Nowicki,Andrzej (1825) – Ledford,Steven O (2005), IECC, 2000.

2.c4 d6 3.b5= Ne5 4.Ba3? (better is 4.Qc2=) 4...Nc4–/+ 5.Qc1 (5.e3 Na3 6.Na3 Nf6–/+) 5...d5–+ 6.f4 (better is 6.Nf3–+) 6...e6?? (better is 6...a6–+) 7.g3?? (7.Bf8 Kf8 8.e3 Nd6+=) 7...c6 (better is 7...Qf6!? 8.Bf8 Qa1 9.Bc5–+) 8.Bh3? (better is 8.Bf8 Kf8 9.bc6 bc6 10.Nf3+=) 8...Na3 9.Na3 Qa5 10.Bg4?? (10.Nc2 cb5 11.Nf3–+) 10...Ba3 11.Bh5 (11.Qc3 Bb4 12.Qb2 Nf6–+) 11...cb5 (11...Bc1 12.Rc1 Nf6 13.Bf3 cb5 14.e3–+) 12.Rb1 (12.Qc3 Qc3 13.dc3 Bd7–+) 12...Nf6 (12...Bc1 13.Rc1 Nf6 14.Bf3–+) 13.Bf3 (13.Bf7 Kf7 14.Qd1–+) 13...Bc1 14.Rc1 Ne4 15.Bh5 Qd2 16.Kf1 Qc1 17.Kg2 e5! 18.Bf7 (18.fe5 Qg5 Double attack (18...Qg5 Decoy)) 18...Kf7 19.Nf3 (19.f5 Qe3 20.Nh3 Qe2 21.Kg1 Bf5 22.Ng5 Ng5 23.a3 Nf3) 19...Qe3 20.Rf1 (20.Ne5 Ke8 21.f5 Qe2 22.Kh3 Bf5 23.g4 Qe3 24.Kg2 Qf2 25.Kh3 Ng5) 20...Qe2 21.Kg1 Bh3 22.Ne1 (22.Ne5 Ke8 23.Rf2 Qf2 24.Kh1 Qg2) 22...Qf1 0–1. Moench,Rebecca (2000) – Hoehne,Daniel (2000), remoteschach.de, 2006.

2.d3 d5 3.Nf3 (3.a3 e5=+) 3...Nb4–/+ 4.a3 Na6 5.c4 Nf6 6.Qa4 (6.cd5 Qd5 7.e4 Qh5=+) 6...Bd7–/+ 7.Qb3 b6 (7...Nc5 8.Qc3–/+) 8.Bf4 (8.cd5!? Nc5 9.Qa2=+) 8...e6 9.Nc3 Bc5 (9...Nc5 10.Qa2–/+) 10.h4 (10.cd5 ed5 11.d4 Bd6 12.Nd5 Bf4 13.Nf4 c5+=) 10...Ng4 (better 10...Bd6 11.Bd6 cd6 12.cd5 Nc5=+) 11.Rh3?? (better 11.e3!? Bd6 12.cd5=) 11...Nf2 (better 11...Bf2 12.Kd1 Nc5–+) 12.Rg3–/+ f5 (12...Nh1 13.Rg7 Bf2 14.Kd2–+) 13.Rg7 (13.cd5 Ng4 14.d4=) 13...Bf8 (13...Ng4!? 14.cd5 Bf2 15.Kd2 Nc5=+) 14.Rg3 (14.Rd7 Qd7 15.Kf2 Nc5+=) 14...Bc5 (14...Ng4=) 15.Nd1 (better 15.e3 Ng4 16.d4+=) 15...Nh1?? (15...Nd1 16.Rd1 Bd6 17.Qb2=+) 16.Rg7?? (better 16.Rh3 dc4 17.Qc4+–) 16...Bf8= 17.Rg5 (17.Qc3!? h6 18.Rd7 Kd7 19.Qh8 Bb4 20.ab4 Qh8 21.Ra6=) 17...Bh6 18.Qc3 Bg5?? (18...Rf8 19.cd5 ed5 20.g3=) 19.hg5 (19.Qh8 Kf7 20.Ne5 Ke7 21.Bg5 Kd6 22.Bd8 Rd8 23.Nf7 Ke7 24.Qd8 Kf7 25.Qd7 Kf6 26.cd5 ed5 27.Ne3 Nc5 28.Nd5 Ke5 29.d4 Kd4 30.0–0–0 Kc4 31.e3 Kb3 32.Qb5 Ka3 33.Qb4 Ka2 34.Qb2) 19...Rf8 (19...Rg8!?=+) 20.Qg7= Rf7 (20...Qe7 21.Qh6=) 21.Qh8 (21.Qh6 Ng3 22.Bg3+–) 21...Ke7= 22.Qe5 Nc5?? (better 22...Qg8!? 23.Qd4 dc4=) 23.Nc3 (23.g6 Rf6 24.Bg5+–) 23...Nb3?? (better 23...Ke8 24.Nd5 Bc6 25.Qh8 Rf8 26.Nc7 Qc7 27.Qf8 Kf8 28.Bc7 Ke7+–) 24.Nd5+– Kf8 (24...Ke8 25.Rb1 Ba4 26.Qe6 Kf8+–) 25.Qh8 1–0. kingbill.. – Ronan mac, ChessWorld.net, 2006.

2.d3 e5 3.c4 Nb4 (3...Bb4!? 4.Bd2 Bd2 5.Nd2 Nf6–/+) 4.Nf3 d6 (4...Nc6 5.Nc3–/+) 5.Qb3 (5.Nc3 Ne7=+) 5...d5 (5...Na6!?–/+) 6.Ne5 Bd7 (better is 6...dc4 7.Nc4 b5=) 7.cd5+/– Qf6 (better is 7...a5 8.a3 a4+/–) 8.Nf3?? (better is 8.Nd7 Kd7 9.Bb2+–) 8...Qa1–+ 9.Ba3 (9.a3 Nd5 10.Nfd2 Qd4 11.Qb7 Rc8–+) 9...Na2 10.Qb2 Qb2 11.Bb2 Bb4 12.Nfd2 c6 13.dc6 Bc6 14.Ba3?? Ba5 15.g3 Ba4 16.Bg2 Rc8 17.e3 Bd7 18.f3 Ba4 19.Bh3 Rc2 20.Bf5 Ne7 21.Be4 b5 22.Bd5 Nc3 23.Ba2 Na2 24.Bd6 Nf5 25.Na3 Rc1 26.Ke2 Nd6 27.Rf1 b4 28.Nab1 Nb5 29.Kf2 b3 30.Ne4 b2 31.Kg2 Bb3 32.Rf2 Be6 33.Rb2 Nbc3 34.h3 Nb1 35.Ra2 Ba2 36.h4 Be6 37.g4 0–0 38.g5 Rfc8 39.f4 Be1 40.Ng3 Bg4 41.Nh1 R8c2 42.Nf2 Bf2 (43.h5 Bh4) 0–1. escaped – cHe, mySchach.de, 2003.

2.d4 e5 3.de5 Ne5 4.c3 Nf6 5.Bf4 Ng6 6.Bg3 d5 7.e3 c5 8.Nd2 cb4 9.cb4 Bd7 10.a3 a5 11.b5 Bc5 12.Nb3 Qb6 13.Qd3 h5 14.Nc5 Qc5 15.Nf3 h4 16.Be5 Ne5 17.Ne5 Bf5 18.Qd4 Qd4 19.ed4 Ne4 20.Rc1 f6 21.Nd3 0–0 22.f3 Nd6 23.Nf4 Rac8 24.Rc8 Rc8 25.Nd5 Rc1 26.Kf2 Rc2 27.Ke3 Ra2 28.Ne7 Kf8 29.Nf5 Nf5 30.Ke4 Nd6 31.Kd5 Ke7 32.g3 Ra3 33.Be2 Rb3 34.gh4 Nb5 35.Bb5 Rb5 36.Kc4 Rb2 37.Kc3 Rb6 38.Rg1 Kf7 39.Ra1 Ra6 40.Rb1 Ra7 41.Rb6 a4 42.Kb2 a3 43.Ka2 Kg6 44.Rb5 Ra4 45.h5 Kh6 46.d5 b6 47.h4 Kh5 48.d6 Kg6 49.h5 Kf7 50.Rb6 Ra7 51.Rb3 Ke6 52.Rd3 Kd7 53.Rd5 Ra6 54.Rd3 Ra5 55.f4 Rh5 56.Ka3 Rb5 57.Rd1 Rb6 58.Rg1 Kd6 59.Rg7 Kd5 60.Ra7 Ke4 61.Ra4 Kf5 62.Rc4 Kg4 63.Ka4 f5 64.Rd4 Kf3 65.Rc4 Ke3 66.Ka3 Rd6 67.Kb4 Rd4 0–1. Ventimiglia,Chuck – O'Sullivan,Patrick, corr, 1999.

2.e3 Nb4 3.Ba3 (3.Nf3 Nf6=+) 3...c5 (better is 3...Nc6–/+) 4.Qh5?? (4.c3 Nc6 5.Bc5 d6=+) 4...Nf6 (better is 4...Nc2 5.Kd1 Na1–+) 5.Qc5=+ Nc6 6.h4 (6.Nf3 e5 7.Qc3 Ne4=+) 6...d6 (6...e5 7.Qc3–/+) 7.Qb5 (better is 7.Qc3=+) 7...Bg4 (7...a6 8.Qb3=+) 8.f3 (8.Qb7!? Bd7 9.Nf3=) 8...Bc8=+ 9.h5 (9.g4 a6 10.Qb2 e5=+) 9...a6 10.Qb3 Qa5 11.Nc3 e5 12.Na4? b5–+ 13.Nb6?? Qb6 14.Rh4 Bf5 15.e4 Be4! 16.d3 Bd3 17.cd3 Qg1 18.0–0–0 Qe3 19.Rd2 Qe1 20.Rd1 Qh4 21.Qc3 Rc8 22.g3 Qa4 23.Be2 Nd5 24.Qb2 Nd4 25.Bc5 Rc5 26.Kb1 Ne2 27.Qe2 Nc3 28.Ka1 Ne2 29.Rd2 Nc3 30.d4 ed4 31.Rd4 Qa2 0–1. cascardo – global, net–chess.com, 2005.

2.e4 Nd4 3.c3+= Nc6 4.Nf3 e5 5.b5 Na5 6.Na3 (6.Qa4 b6+/–) 6...Ba3 (6...d5 7.d4 ed4 8.Qd4=) 7.Ba3+/– Qf6 8.Be2 (8.d4 ed4 9.Bb4 b6 10.cd4 Qg6+/–) 8...d6 (8...a6 9.ba6 b6 10.Qa4+=) 9.0–0 Qg6 10.h3?? (better is 10.Bb4 b6 11.Re1+/–) 10...Bh3+= (worse is 10...Qe4 11.Bb4 Nc4 12.d3+/–) 11.g3? (better is 11.Ne1+=) 11...Bf1–+ 12.Bf1 Nf6 13.Nh4 Qg5 14.b6? (14.d3–+) 14...ab6 15.Bb5 c6 16.Be2 (16.Bd3 d5 17.Nf5 Nc4–+) 16...Ne4 17.Nf3 Qh6 18.c4 (18.Rb1 Qe6 19.Qc2 Nf6–+) 18...0–0 19.Bc1 Qh3 20.Qc2 Nf2! 21.Kf2 f5 22.Ng5 (22.Bb2–+) 22...Qh2 23.Ke3 (23.Kf1 f4 24.Qh7 Qh7 25.Nh7 Kh7 26.Rb1 fg3 27.Kg1–+) 23...Qg3 24.Nf3 f4 (better is 24...e4 25.Qd1 ef3 26.Bf3 Qe5 27.Kf2 Qa1 28.d3–+) 25.Kd3 Qf2 26.Ba3 (26.Qd1 e4! 27.Kc2 ef3 28.Bd3–+) 26...e4 27.Kc3 ef3 (better is 27...Qe2 28.Bd6 Qf3 29.Kb2–+) 28.Bd3 c5 29.Bh7 Kh8 30.Rh1 (30.Qe4 Nc4! 31.Bc1–+) 30...Qd4 0–1. pinetree11 – West Islander, ChessWorld.net, 2011.

2.Nf3 Nb4 3.Ba3 (3.c3 Nc6=+) 3...Nd5 (3...Nc6=+) 4.Nd4 (4.e4 Nf4=+) 4...e5 (4...Ngf6 5.e3–/+) 5.Nf5 (5.Bf8 Kf8 (5...ed4?? 6.Bg7 Ngf6 7.Bh8+–) 6.Nb3 Ngf6–/+) 5...Qg5 (better is 5...Nge7–/+) 6.Nc3?? (better is 6.Bf8 Kf8 7.Ng3–/+) 6...Nc3–+ (6...Ba3?! 7.Nd5 Kd8 8.e4–/+; 6...Qf5 7.Nd5 Ba3 8.Nc7 Kd8 9.Na8=) 7.Ne3 Nd1 8.Kd1 Ba3 9.Nc4 Bb4 10.c3 b5 11.Ne3 Bc5 12.Nd5 Kd8 13.Rb1 Nf6 14.Nf6 Qf6 15.Rb5 Bf2 16.c4 Ba6 17.Rb4 e4 (18.Rb1 e3–+) 0–1. kdpadua – global, net–chess.com, 2005.

2.a3 Nb4??

3.ab4+– a5 4.ba5 b6 5.Bb2 ba5 6.e3 Nf6 7.Nf3 g6 8.Be2 Bg7 9.0–0 0–0 10.d4 d5 11.Nbd2 e5 (11...Bf5 12.c4+–) 12.c3 (better is 12.Ne5!? Ne4+–) 12...ed4 13.cd4 c5 (13...Bd7+–) 14.dc5 d4 (14...Qc7 15.Nb3+–) 15.ed4 Bf5 16.Bc4 Rb8 (16...Re8+–) 17.h3 (17.Bc3 Ra8+–) 17...Nh5?? (17...Rb2 18.Qa4+/–) 18.Re1 (18.Bc3 Nf4+–) 18...Nf4?? (better is 18...Rb2 19.g4 Bd4 20.gf5 Bc5 21.fg6 hg6+–) 19.Qb3 Rb3 20.Bb3?? (20.Nb3 Qd7 21.Ne5 Be5 22.Re5= (worse is 22.de5 Bh3 23.gh3 Qh3–+)) 20...Ng2?? (better is 20...Nd3 21.Bc3 Ne1 22.Re1 Qc7+=) 21.Kg2+– Bd4?? (21...Qd7 22.Ra5 Bh3 23.Kh1 Rb8+–) 22.Bd4 (22.Nd4?! Qg5 23.Kh2 Qd2+/–) 22...Qd4 (22...Qd7+–) 23.Nd4 Rd8 24.Nf5 gf5 25.Kf1 (better is 25.c6 Rc8 26.Rec1 a4 27.Ra4 Rc7+–) 25...Rd2 26.Rad1 Rd1 27.Rd1 Kg7 28.Ra1 Kg6 29.Ba4 f6 30.Bd1 h5 31.Be2 Kh6 32.Rc1 f4 33.c6 f5 34.c7 h4 (34...Kh7 35.c8Q f3 36.Qf5 Kg8 37.Rc8 Kg7 38.Qg5 Kf7 39.Bc4) 35.c8Q 1–0. Fournier,Frederic (1925) – Dragoner, Active Blind, 2007.

3.ab4+– b6 4.e3 Ba6?? (4...Bb7+–) 5.Ba6 Qb8 6.Nf3 c5 7.bc5 d6 (7...bc5 8.d4+–) 8.cd6 (8.Bb5 Kd8 9.Nd4 Kc8+–) 8...ed6 (8...Qd6 9.Bb5 Kd8 10.Nd4+–) 9.Nc3 Qd8 (9...Nf6 10.Bb5 Nd7 11.Bc6+–) 10.0–0 (10.Bb5 Qd7 11.Bd7 Kd7+–) 10...Qd7 (10...Nf6+–) 11.Bb5 a6 12.Bd7 Kd7 13.Nb5! a5 (13...ab5 14.Ra8 Pinning (14.Ra8 Deflection)) 14.c4 (better is 14.Nfd4 Ne7 15.Qg4 f5+–) 14...d5 15.cd5 (better is 15.Ne5 Ke8 16.Nc7 Ke7 17.Ba3 Kd8 18.Na8 Nf6 19.Nf7 Kc8 20.Nb6 Kb7+–) 15...Rc8 16.d4 (16.Ne5 Kd8 17.Qg4 Rc7 18.Nc7 Nf6+–) 16...Rc1 17.Qc1 Ke8 18.Qc8 Ke7 19.Ne5 Kf6 20.f4 Ke7 (20...Bc5 21.Qc6 Bd6 22.Qd6 Kf5 23.e4 Ke4 24.Rae1 Kf5 25.g4) 21.Qd7 Kf6 22.g4 (22.Qf7) 22...Be7 (22...Bd6 23.Qd6) 23.g5 1–0. Fournier,Frederic (2195) – armandobarca(C), Active, 2006.

3.ab4+– e5 4.c3 +–.

2.a3 Nd4

3.Bb2 Nc2?? 4.Qc2+– Nf6 5.Nc3 e6 6.Nb5 (6.e4 a5+–) 6...c6 7.Nd4 Be7 8.Ngf3 0–0 9.e3 d5 10.Bd3 (10.Nb3 Ne4+–) 10...Bd6 (10...a5 11.Rb1+–) 11.Ng5 (11.Nb3 h6+–) 11...e5 (11...h6 12.Nh7 Nh7 13.Bh7 Kh8 14.Bd3+–) 12.Bh7 Nh7?? (12...Kh8 13.Nf5 Bc7+–) 13.Qh7 (13.Nh7?! Re8 14.Nf5 Bc7+–) 1–0. TwelveTeen (2165) – j_coca (1795), lichess.org, 2017. (=1.a3 Nc6 2.b4)

3.e3 Nc2?? (better 3...Ne6+=) 4.Qc2+– e6 5.Bb2 Bd6 (5...Nf6+–) 6.Bg7 Qg5 (6...Be5 7.Be5 f6 8.Bc7 Qe7+–) 7.Bd4 (better 7.Bh8 Qg6 8.Qg6 hg6 9.Nc3+–) 7...Nf6 (7...e5 8.Nf3 Qe7 9.Bc3+–) 8.Nf3 Qh6 9.Nc3 Ng4 (9...Rg8 10.Nb5+–) 10.Ne4 (10.Bh8 c6+–) 10...Be7 (10...e5 11.Nd6 Qd6 12.Bb2+–) 11.Qc7 (better 11.Bh8 d5 12.Nc5+–) 11...Qe3 (11...0–0+–) 12.Be3 (12.de3!? f6+–) 12...Ne3 13.Ke2 (13.de3 f5 14.Nd6 Bd6 15.Qd6 Rg8+–) 13...b6 (13...Nd5 14.Qg3+–) 14.d3 (better 14.de3 f5 15.Nd6 Bd6 16.Qd6 Ba6 17.Ke1 Bf1 18.Rf1 h6+–) 14...Nf5 (14...Nd5 15.Qe5 f6 16.Qg3+–) 15.Nd6! Bd6 (15...Bd6 16.Qc3 Combination; 15...Nd6 16.Ke1 Decoy) 16.Qd8 (better 16.Qc4 Bf8 17.g4+–) 16...Kd8–+ 17.Ke1 (17.g4 Nh6–+) 17…Bb4! (17...Bb4 18.ab4 Bb7–+) 0–1. FeegLood (2025) – ookkiii (1870), lichess.org, 2015.

3.e3 Nc2?? (better 3...Ne6+=) 4.Qc2+– e6 5.Bb2 Nf6 6.Nc3 (6.Nf3 d5+–) 6...Bd6 (6...a5 7.b5+–) 7.Nb5 Be5 (7...a6 8.Nd6 cd6+–) 8.Be5 0–0 9.Bc7 Qe7 10.Bd6 Qd8 11.Nf3 a6 12.Nc7 Ne8 13.Bd3 (13.Bf8 Nc7 14.Bc5 Ne8+–) 13...Nd6 14.Bh7 Kh8 15.Bg8 (better 15.Na8!? f5 16.Bg6 Qf6+–) 15...Nf5 (15...Kg8 16.Na8 b5 17.Qc5+–) 16.Bf7 Qf6 17.Nd5 (better 17.d4 Rb8 18.Ne5+–) 17...Qa1–+ 18.Ke2 (better 18.Qd1!? Qd1 19.Kd1 ed5 20.Bd5–+) 18…Qd1 (18...Qd1 19.Kd1 Rf7+–; 18...Qh1 19.Ne5 Kh7 20.Bg6 Kg8 21.Bf5 ed5 22.Bh7 Kh8 23.Ng6 Kh7 24.Nf8 Kg8 25.Ng6 Qg2 26.Ne7 Kf7 27.Nc8 Qg4 28.Kf1 Qc4 29.Qc4 dc4 30.Nb6=) 0–1. TwelveTeen (2115) – SamuelIFowler (2035), lichess.org, 2017. (=1.a3 Nc6 2.b4)

3.e3 Nf5 4.Bb2 e6 5.c4 b6 6.Nf3 Ba6 (6...Nf6 7.Be2+=) 7.d4 Nd6 8.Nbd2 Nf6 9.Qc2 Ng4 10.h3 Nh6 11.Bd3 Be7 12.0–0 0–0 (12...f5 13.b5 Bb7 14.c5+/–) 13.b5 (13.Bh7 Kh8 14.Bd3 Bb7+–) 13...Bb7 14.c5 Ndf5 15.e4 (15.g4!? Nh4 16.Nh4 Bh4+–) 15...Nh4+/– 16.c6 dc6 17.bc6 Bc6?? (better is 17...Bc8+/–) 18.Qc6+– Bd6 (18...Bg5 19.Rad1+– (19.Ng5?! Qg5 20.g3 Qd2=)) 19.e5 Be7 20.Nh4 Bh4 21.Nf3 Be7 22.Rac1 a5 23.Qc7 Qc7 24.Rc7 Bd8 25.Rc2 Nf5 26.Bf5 ef5 27.d5 Be7 28.d6 Bd8 29.Rfc1 b5 30.Bd4 f6 31.e6 f4 32.Rc8 Rc8 33.Rc8 b4 34.Rd8! Rd8 35.e7 Rb8 36.d7 ba3 37.e8Q Re8 38.de8Q 1–0. juanpacio (1640) – kings, internet, 2006.

2.a3 d5

(--> 1.b4 d5 2.a3 Nc6).

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

3.Bb2 f6 4.e3 e5 (--> 1.b4 e5 2.Bb2 f6 3.a3 d5 4.e3 Nc6).

2.a3 d6

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

3.e3 Nf6 4.g3 g6 5.Bb2 Ne4?? (better is 5...Bg7+=) 6.Bh8+– f6 7.f3 (7.Bg2 Ng5 8.Bd5+–) 7...Ng5 8.h4 Nf7 9.Nc3 Nh8 10.Nge2 Nf7 11.f4 f5 12.Bg2 Bg7 13.Nd4 e5?? (13...Nd4 14.ed4 Combination; 13...Bd4 14.Bc6 Double attack) 14.Nc6+– Qd7 (14...bc6 15.Bc6 Bd7 16.Ba8 Qa8 17.0–0+–) 15.Na5 e4 16.d4 b6 17.Nc4 d5 18.Ne5 Qe6 19.Qe2 a6 20.0–0 White plans b5 20...Be5 21.fe5 Qc6 22.Nb1 a5 23.b5 (23.b5 Qe6 24.Nd2+–) 1–0. Willi_weizenkeim – Lakebj, playchess.de, 2002.

2.a3 e6

3.Bb2 (--> 1.b4 e6 2.Bb2 Nc6 3.a3).

3.Bb2 d5 (--> 1.b4 d5 2.Bb2 e6 3.a3 Nc6).

2.a3 Nf6

3.Bb2 (--> 1.b4 Nf6 2.Bb2 Nc6 3.a3).

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

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

3.c4 Nd4 4.Bb2 Nf5 (4...Ne6 5.Nf3=) 5.Qc2+= g6 6.Bf6 ef6 7.g4 (7.Nf3 a5 8.e4 Ne7+=) 7...Nd4 8.Qc3 Ne6 9.h4 (9.d4 d5=) 9...h5 (9...Bg7 10.d4 f5–/+) 10.g5? (better is 10.gh5!? Rh5 11.Bg2=+) 10...Bg7–+ 11.Nf3? (better is 11.d4 fg5 12.e3–+) 11...fg5 12.d4 b6 (better is 12...g4!? 13.Nbd2–+) 13.Nbd2 (13.hg5 Bb7 14.Bg2 Nd4 15.Qe3 Ne6–+) 13...c5 (better is 13...g4 14.Ne5 Bb7–+) 14.Bh3?? (better is 14.hg5 Bb7 15.Rh4–/+) 14...cd4 (14...Nd4?! 15.hg5 Ne6 16.Qc1 Ng5 17.Bg2–+; 14...gh4?! 15.e3–+) 15.Qd3 Nf4 (better is 15...g4–+) 16.Qe4 Qe7 17.Qa8?? (better is 17.hg5 d3 18.Rb1 Qe4 19.Ne4 de2 20.c5–+) 17...Qe2 0–1. voyamatar – pigpigpig, Live Game Caissa's Web, 2004.

3.e3 g6 4.Bb2 Bg7 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.a3 Nc6).

2.a3 g6

3.Bb2 e5 4.b5+/– Nd4 5.e3 Nf5 6.Be5 f6 7.Bb2 b6 8.Qf3 Rb8 9.Nc3 Bb7 10.Nd5 Nge7?? (better is 10...Bg7+–) 11.Nf6 Kf7 12.Bc4 Kg7 (12...d5 13.Nd5 Bd5 14.Bd5 Qd5 15.Qd5 Nd5 16.Bh8 Nd6+–) 13.Ng4 Nd4 14.Bd4 1–0. Fournier,Frederic (2100) – Dave535124, chessworld.net, 2008.

3.Bb2 f6 4.e3 e5 5.Nf3 a5 6.b5 Nce7 (6...Nb8 7.e4+=) 7.c4 (7.Ne5 d5+–) 7...c6 (7...e4 8.Nd4 c5 9.Nb3+/–) 8.bc6 (8.Ne5 d5+/–) 8...Nc6 9.Nc3 b6 10.Be2 Nge7 11.d3 Nf5 12.0–0 Nd6 13.Nb5 Nb5 14.cb5 Ne7 15.a4 d6 16.Rc1 Bb7 17.Qc2 Rc8 18.Qb3 Bd5 19.Qa3 Nf5?? (better is 19...Bg7+=) 20.e4+– Be4 21.de4 d5 22.Rc8 Ba3 (22...Qc8 23.Qd3 de4 24.Qe4 Bd6+–) 23.Rd8 Kd8 24.Ba3 (24.ef5?! Bb2 25.Rd1 d4+–) 24...Nd4 (24...de4 25.Rd1 Kc8 26.Nd2+–) 25.Nd4 ed4 26.ed5 Re8 27.Bf3 g5 (27...d3 28.Rd1 d2 29.Kf1+–) 28.Rd1 h6 (28...f5 29.h3 d3 30.Rd3 Re1 31.Kh2+–) 29.g3 (better is 29.Bb2!? f5 30.d6 Re6 31.Bd4 Rd6 32.Bb6 Kd7 33.Rd6 Kd6 34.Ba5 g4+–) 29...f5 30.Bg2 f4 (30...d3 31.Bb2 Kc7 32.Bd4+–) 31.Rd4 (31.gf4 g4+–) 31...fg3 32.hg3 h5 (32...Re1 33.Kh2 Re2 34.Bf8+–) 33.d6 (33.Rc4 g4+–) 33...h4 (33...Re1 34.Kh2 Re8 35.Bc1+–) 34.gh4 gh4 35.Rh4 (35.Rc4 Rg8 36.Kf1 Rg2 37.Kg2 h3 38.Kh3 Kd7 39.Rc7 Ke6 40.d7 Kf5 41.d8Q Kf4 42.Rf7 Ke4 43.Kg4 Ke5 44.Re7 Kf6 45.Qb6) 35...Re1 (35...Rg8 36.Bc1 Rg6 37.Rh6+–) 36.Kh2 Ra1 37.Rh8 Kd7 38.Bh3 1–0. Fournier,Frederic – trancadis, Active, 2007.

3.Bb2!? Nf6 4.b5 =.

3.Bb2 Nf6 4.e3 Bg7 (--> 1.b4 Nf6 2.Bb2 g6 3.e3 Bg7 4.a3 Nc6).

3.g4 Bg7=+ 4.c3 Nf6 5.g5 Nd5 6.Ra2 0–0 7.Bg2 e6 8.Nf3 Ne5 9.c4 Nf3 10.Bf3=+ Nf4 11.Rg1 Nh3–/+ 12.Rg3 Ng5 13.d3 Nf3–+ 14.Rf3 b6 15.Be3 Qh4 16.Bf4 Qg4 17.Kd2? Bf6?? 18.Qc1?? d6 19.h3 Qf5?? 20.e4?? Qh5–/+ 21.Ke2? e5 22.Bh6 Bh3 23.Qh1 Qh6 24.Rh3–/+ Qg7 25.b5 Rfe8 26.a4 Bd8 27.Qf3 a6 28.ba6 Ra6–+ 29.Nc3 c5 30.Rb2 Bc7 31.Nd5 f5 32.Nc7 Qc7 33.ef5–/+ Qf7 34.f6?? Ra4 35.Qc6 Ra3 36.Qb6 e4–+ 37.Rh1?? Qf6 38.Qb7 Qf3 39.Kd2 Rd3 40.Kc2–+ Rc3 41.Kb1 Qh1 42.Ka2 Rf8 43.Rb1 Rf2 44.Ka1 Ra3# 0–1. bigjoe – berto (1630), net–chess.com, 2005.

2.a3 h5

3.b5+= Ne5 (3...Na5 4.e4+=) 4.d4 Ng6 5.e4 d6 (5...d5 6.ed5 Qd5 7.c4+=) 6.Bc4 (6.Nf3 e5+=) 6...Qd7 (6...Nf6 7.Nc3+=) 7.Nf3 Nf6 8.Ng5 (better is 8.Nc3+/–) 8...a5?? (better is 8...e6+=) 9.Bf7+– Kd8 10.Bg6 (10.Bg6 e5 11.Nf7 Ke7 12.Nh8 Qb5 13.d5+–) 1–0. Wall,Bill – Methical, internet, 2001.

3.f3 Nd4 4.Kf2 (4.e3 Nc6+=) 4...g5 (4...e5 5.Bb2=) 5.h4 (5.Bb2 Bg7=) 5...gh4 6.b5 (6.Bb2 Bg7+=) 6...b6 (6...e5 7.e3 Nf5 8.Ne2–/+) 7.Ra2 (7.Bb2 Bg7=) 7...Rh7 (7...Nb5 8.Bb2 Rh6 9.e4–/+) 8.f4 (8.e3 Nf5+=) 8...d5 (8...Nb5 9.Bb2–/+) 9.d3? (9.e3 Bg4 10.Nf3 Nf5+=) 9...f5 (9...Nb5 10.Ke1–+) 10.Ke3? (better is 10.c4 Ne6 11.e3=) 10...Rh6?? (better is 10...Nb5 11.Nf3 Bg7–+) 11.Kd2 0–1. Aronian,Levon – Landa,Konstantin, CCM, 2003. (=1.a3 Nc6 2.b4 h5)

3.f3 d5 4.Bb2 =.

2.Ba3 a6

3.c3 Nf6 4.d4 e5 5.d5 Ne7 6.c4 a5 7.b5 Ne4 8.Bb2 Ng6 9.Nd2 Bb4 10.Ngf3 Qf6 11.Qc2 Bd2 12.Nd2 Nd2 13.Qd2 0–0 14.c5 c6 15.d6 cb5 16.e3 Qg5 17.Bb5 Qg2 18.Ke2 Qg4 19.f3 Qg2 20.Kd3 Qf3 21.Kc2 Qe4 22.Bd3 Qc6 23.Bg6 fg6 24.Qc3 Rf2 25.Kb3 Qd5 26.Qc4 Rb2 27.Kc3 Rc2 28.Kc2 Qc4 29.Kd2 e4 30.Ke1 Qc3 31.Ke2 Qb2 0–1. boldeagle – mikekelly666, ChessWorld.net, 2005.

3.e3 e5 =+.

3.Nf3 Nf6 4.c4 (4.e3 e6=+) 4...d5 5.cd5 Nd5 6.e4 (6.Nc3 e5–/+) 6...Nf4 7.d4 Nb4?? (better 7...f5 8.ef5 Bf5–/+) 8.Bb4+– 1–0. guestrtfw – guestddmp, internet free game, 2018.

3.g4 d5 4.h3 –/+.

3.g4 g5 4.Bg2 (4.h4 gh4 5.Nf3 e5=+) 4...Bg7 (better is 4...d6=+) 5.Bc6? (better is 5.Nc3=+) 5...Ba1–+ (5...bc6?! 6.c3=+) 6.b5?? (6.Bf3–+) 6...dc6 7.bc6 bc6 (better is 7...Qd5 8.Nf3 Bg4 9.cb7–+) 8.Be7 (8.Bb4–+) 8...Ne7 9.h4 (9.e4 Be6–+) 9...Bg4 10.hg5 Rb8 11.f4 Rb5 12.Rh6 Ng8 13.Rc6 Rb4 14.Ra6 Rf4 15.a4 Rf5 16.a5 Rg5 17.c4 Rh5 18.Qa4 Kf8 19.Qa1 Rh1 20.Qa3 Kg7 21.Kf1 Qe8 22.Rc6 Qe4 23.a6 Qf4 24.Qf3 Qe5 25.a7?? Nf6 26.a8Q?? Ra8 27.Rf6 Rb8 28.Rf7 Kg8 29.Qg4 Kh8 30.Qg2 Rb1?? 31.Kf2= Rhg1?? 32.Rf8 1–0. jblake – pthornton, net–chess.com, 2005.

2.Ba3 d5

3.b5 Na5 4.e3 Qd6?? (better is 4...Nc4=) 5.Bd6+– cd6 6.b6 ab6 7.Nc3 h5 (7...Nf6 8.Nf3+–) 8.Nd5 Bg4 (8...Rb8 9.Qb1 e6 10.Qb6+–) 9.f3 Bf5 10.Nc7 Kd7 11.Na8 g5 12.Qb1 Bg7 13.Qb5 Nc6 14.Qf5 e6 15.Qf7 (15.Qf7 Nge7 16.Nb6 Kc7 17.Qg7+–) 1–0. pierre – QuisCustodiet, chess.com, 2007.

3.b5 Ne5 4.d4 Nc4 5.e4 Na3 6.Na3 de4 7.c4 c5 8.dc5? (better is 8.Nc2–+) 8...Qa5 9.Qd2 Qa3 10.Rd1 Bf5 11.c6 (11.Qd5 Qa5 12.Rd2 g6 13.Qb7 Rc8–+) 11...bc6 12.bc6 (12.Qd4 Nf6–+) 12...e5 13.Qd5 (13.Rb1 Rd8 14.Rb3 Rd2 15.Ra3–+) 13...Bb4 (13...Bb4 14.Ke2 Ne7–+) 0–1. Hammi.Bogart – Klaus Behrmann, ChessWorld.net, 2003.

3.b5 Ne5 4.e3 =.

2.b5 a6??

3.bc6+– bc6 4.Nc3 d5 5.Nf3 d4 6.Na4 Bg4 7.Bb2 (7.Ne5 Bf5+–) 7...Bf3 8.gf3 Nf6 9.c3 e5 10.cd4 ed4 11.Rc1 c5 12.Nc5 Bc5 13.Rc5 Rb8 14.Re5 Kf8 15.Ba3 Kg8 16.e4 Nd7 (16...d3 17.Be7 Qd4 18.Bf6 gf6 19.Ra5+–) 17.Rd5 c6 (17...Qe8 18.Rd4 Qe6 19.Ra4+–) 18.Rd4 Qb6 (18...Qc7+–) 19.Rd7 Qa5 (19...h6+–) 20.Bd6 Rb2 21.Bc7 g6 22.Ba5 Kg7 23.Bc3 Kh6 24.Rf7 Rbb8 25.Bg7 Kh5 26.f4 Kh4 27.Bf6 g5 28.Bg5 1–0. MarRam – Cerrah,Omer Faruk, internet, 2010.

3.bc6+– bc6 4.e3 Bb7 5.c4 c5 6.Nf3 Bf3 7.Qf3 Nf6 8.Nc3 Ne4 (8...e6+–) 9.Qe4 d5 (9...Rb8 10.Be2+–) 10.Nd5 (better 10.cd5 Qd6 11.Ba3+–) 10...Qd5 (10...Rb8+–) 11.Qd5 e6 12.Qa8 Ke7 13.Qa6 Kf6 14.Bb2 Kf5 15.Bd3 Kg4 16.Qc6 Kg5 (16...Be7 17.Qf3 Kg5 18.Qg3 Kh6 19.Bg7 Kh5 20.Be2) 17.h4 Kg4 (17...Kh6 18.g4 Be7 19.g5 Bg5 20.hg5 Kg5 21.Qg2) 18.Qf3 1–0. RichardSommer (2110) – chess24tvyoutube (1935), lichess.org, 2020.

2.b5 b6??

3.bc6+– dc6 4.Bb2 c5 5.e3 Be6 (5...a6 6.Be2+–) 6.Qf3 Qd5 (6...Bd7 7.Be5 c6 8.Ba6+–) 7.Bb5 Kd8 8.e4 a6 (8...Qd6+–) 9.ed5 Bd5 10.Qd5 Kc8 11.Qa8 1–0. GuestDWBT – GuestCCVD, freechess.org, 2019.

3.bc6+– dc6 4.Bb2 Nf6+–.

3.bc6+– dc6 4.Bb2 Bh3?? 5.Nh3 Nh6 6.e3 Ng4 (6...e6+–) 7.Qg4 c5 (7...Qd7 8.Qf3 Rb8+–) 8.Bb5 Qd7 (8...c6 9.Bc6 Qd7 10.Qd7) 9.Qd7 1–0. Fournier,Frederic (1970) – Tita, Defi echecsemail.com, 2005.

3.bc6+– dc6 4.e3 Bb7 5.Nf3 Nf6 6.Bc4 e6 7.0–0 Bd6 8.Nc3 0–0 9.Bb2 b5 10.Bb3 c5 (10...a5 11.a4 b4 12.Ne2+–) 11.Nb5 Nd5 (11...Rb8 12.Nd6 cd6 13.Rb1+–) 12.Nd6 Qd6 13.e4 Nf4 (13...Nb6 14.d3+–) 14.Be5 Qe7 (14...Qc6 15.Bf4 c4+–) 15.Bf4 e5 (15...Be4 16.Re1 Bf3 17.Qf3+–) 16.Ne5 Be4 (16...Qf6 17.Qg4 h5 18.Qg3+–) 17.Re1 c4 18.Bc4 Bg2 19.Nf7 (19.Kg2 Qf6 20.Qg4 a5+–) 19...Qf7 20.Bf7 Rf7 21.Kg2 Rf4 22.Re7 Raf8 23.Qe2 h5 24.Qe6 (24.Rc7 R8f5 25.Rg1 Rf7 26.Qe8 Rf8 27.Qe6 Kh7 28.Kh1 Rg4 29.Rg4 hg4 30.Qg4 Rf7 31.Qh5 Kg8 32.Qf7 Kh7 33.Qg7) 24...Kh7 25.Rc7 Rf2 26.Kg1 (26.Kh1 R2f6 27.Qe4 Kg8 28.Qd5 Kh7 29.Rg1 Kh8 30.Rgg7 Rf1 31.Rg1 Rg1 32.Kg1 Rg8 33.Kh1 Rg5 34.Qg5 a6 35.Qg7) 26...R2f3 27.Qe5 R8f6 28.Qh5 Rh6 (28...Kg8 29.Re1 Rf8 30.Qg6 R3f7 31.Rf7 Rf7 32.Re8 Rf8 33.Re7 Rf1 34.Kf1 Kf8 35.Qg7) 29.Qf3 Rg6 (29...a6 30.Qe4 Rg6 31.Kf2 a5 32.Rg1 Kg8 33.Qg6 Kf8 34.Qf7) 30.Kf2 Rf6 (30...Kh8 31.Qf5 Kh7 32.Rg1 Kh8 33.Qg6 Kg8 34.Qg7) 31.Qf6 a6 (31...Kg8 32.Qg7) 32.Qg7 1–0. DEFFM – luciot, freechess.org, 2019.

2.b5 d5??

3.bc6+– bc6 4.Bb2 Bf5 5.e3 h5 6.Nf3 h4 7.Bd3 e6 8.Bf5 ef5 9.0–0 h3 10.gh3 f6 11.Nc3 Bd6 12.Kg2 g5 13.Rg1 a5 14.Kf1 a4 15.d3 a3 16.Bc1 Rh3 17.e4 fe4 18.de4 de4? (better is 18...Qc8!? 19.ed5 Ne7+–) 19.Ne4+– Rf3?? (19...Qd7 20.Qe1 Kd8 21.Qc3 Bh2 22.Nf6 Qd1 23.Kg2 Qg1 24.Kh3 Qf2 25.Qd2 (25.Nh2?! Nf6 26.Qd2 Qd2 27.Bd2 Kd7+–) 25...Qd2 26.Bd2 (26.Nd2?! Be5 27.Ng8 Ba1+/–) 26...Nf6 27.Bg5+–) 20.Qe2 (better is 20.Qf3 Be5 21.Ng5 Qd5 22.Qh5 Kd7 23.Qh3 Ke8+–) 20...Bf4?? (better is 20...Be5 21.Rb1 Rf5+/–) 21.Qf3 (21.Ng5 Be5 22.Ne6 Qe7 23.Rg8 Kf7 24.Ra8 Qe6 25.Qf3 Qc4 26.Kg2 Ba1 27.Qh5 Ke6 28.Qe8 Kf5 29.Ra3 Bc3 30.Qh5 Ke6 31.Qh3 Ke7 32.Rc3 Qe4 33.Qf3 Qf3 34.Kf3 c5+–) 21...Bc1 (21...Qd4 22.Rb1 Bh2 23.Rh1 Qc4 24.Kg2+–) 22.Rc1 Qe7 (22...Qd4+–) 23.Re1 0–0–0 24.Nf6! Qf6 (24...Nf6 25.Re7) 25.Qf6 (better is 25.Qg4 Kb7 26.Rb1 Qb2 27.Rb2 ab2 28.Qb4 Kc8 29.Qb2+–) 25...Nf6 26.Rg5 Rd2 27.Ra5 Kb7 28.Ra3 c5 29.c4 c6 (29...Rd4 30.Rc1+–) 30.Rb1 (better is 30.h4!? Ng4+–) 30...Kc7 31.Ra7 Kd6 32.a4 Ra2 (32...Ng4 33.Ke1 Rc2 34.Rbb7 Rc4 35.Rd7 Ke5 36.Re7 Kd4 37.h4+–) 33.a5 Ke5 34.Re7 (34.Re1 Kf5+–) 34...Kf4 (34...Kd4 35.Rf7 Ne4 36.Re1 Nd2 37.Kg2+–) 35.Rf7 Ke5 (35...Kg5 36.h4 Kg6 37.Ra7+–) 36.Ra7 (36.Re1!? Kf5 37.Rf8 Ra5+–) 36...Ne4 37.a6 (better is 37.Re1 Kf5 38.Re2 Ra1 39.Kg2+–) 37...Nd2= 38.Kg2 Nb1 39.Re7 Kd4 40.a7 Nc3 41.Rd7? (better is 41.h4 Ne4 42.Rf7=+) 41...Ke4?? (better is 41...Kc4 42.h4 Nb5–+) 42.Rc7 Ra6 (better is 42...Kd3!? 43.h4 Ne4–/+) 43.Re7 Kd3 44.h4 Ra2 45.h5 Kc2?? (better is 45...Ne4=) 46.h6+– Kb3 47.h7 Ra7 48.Ra7 Kc4 49.h8Q Kd3 50.Rd7 Kc2 51.Qh7 Kb2 52.Rb7 Ka1 53.Qc2 Nd5 54.Qb2# 1–0. AArow – Duffer, ICS game chess.net, 1998.

3.bc6+– bc6 4.Bb2 f6 5.Nc3 e5 6.d4 Bd6 7.Nf3 ed4 (7...e4 8.Nd2+–) 8.Nd4 Ne7 9.e4 de4 (9...Rb8 10.Rb1+–) 10.Ne4 Bf5 (10...Be5 11.Bc4+–) 11.Qh5 (11.Nf5 keeps an even firmer grip 11...Nf5 12.Qh5 g6 13.Nf6 Ke7 14.Qe2 Kf8+–) 11...g6 (11...Bg6 12.Qg4 f5 13.Nd6 cd6+–) 12.Nf6 Kf7 13.Qg5 (better 13.Bc4!? seems even better 13...Nd5 14.Nc6 gh5 15.Bd5 Kg6 16.Nd8 Rad8+–) 13...Rg8 (13...Bb4 otherwise it's curtains at once 14.Kd1 Nd5+–) 14.Bc4 (14.Bc4 Nd5 15.Nc6 Re8 16.Kd1+–) 1–0. AvImd (1770) – JanSeifert, Hourly SuperBlitz Arena, 2020.

2.c3 b6

3.Bb2 Bb7 4.e3 Nf6 5.Nf3 e6 6.d4 d5 7.Bd3 Bd6 8.Nbd2 0–0 9.0–0 a5 10.a3 ab4 11.ab4 Ra1 12.Qa1 e5 13.de5 Ne5 (13...Be5? 14.b5 (14.Ne5?! Ne5 15.Be2 Qd6=) 14...Bh2 15.Kh2 Qd6 16.Kg1+–) 14.Ne5 Be5 15.Nf3 Bd6 16.Rd1 Qc8 17.c4 dc4 18.Bc4 c5?? (18...Qg4 A) 19.Bf6 Bf3 20.Bf1 Bd1–+ (20...gf6?! 21.Rd4 Qg5 22.Qc1–+); B) 19.Be2 Ra8 20.Qc1=) 19.bc5 (better is 19.Rd6 Qc7 20.Be5 (20.Bf6?! Qd6 21.Bg7 Ra8+–) 20...cb4 21.Qd4+–) 19...Bc5 (better is 19...Bf3!? 20.gf3 Be7=) 20.Bf6+/– gf6 (20...Bf3 21.gf3 b5+–) 21.Qf6+– Qe6?? (better is 21...Qc6 22.Qg5 Kh8+–) 22.Be6 fe6 23.Qe6 (23.Qg5 Kh8 24.Rd7 Be7 25.Re7 Rf7 26.Re8 Rf8 27.Rf8) 23...Rf7 24.Rd8 1–0. Fournier,Frederic (1960) – javo298 (1965), Active, 2008.

3.d4 d6 4.d5 (4.e4 e5+=) 4...Ne5 5.f4 Nc4 (5...Ng6 6.e4+=) 6.b5 (6.e4!? b5 7.a4+/–) 6...Qd7 (6...Nf6+=) 7.a4 (7.e4 Na5+=) 7...Bb7 (7...a6!?=) 8.e4+= g6?? (better is 8...Na5+=) 9.Bc4+– Bh6 (9...a6 10.Ra3+–) 10.Nh3 Nf6 11.Nd2 Rd8 12.Nf3 Ne4 13.Kf1 Nc3?? 14.Qd4 Nd5 15.Qh8 Bf8 16.Qh7 Qg4. tomakoma – leosimas, net–chess.com, 2003.

3.d4 Nf6 4.Nf3 =.

3.e3 Bb7 4.Nf3 e6 5.Bb2 Qe7 6.d4 0–0–0 7.Bd3 d5 8.Nbd2 a5 9.a3 ab4 (9...Qf6!?+/–) 10.ab4+– f5 11.0–0 g5 12.h3 (12.b5 Nb8+–) 12...h5 13.Re1 h4 (13...Qg7 14.b5 Na5 15.Ne5+/–) 14.Qc2 (better is 14.b5!? Na5 15.Ne5+–) 14...g4+/– 15.hg4 fg4 16.Nh2 Bg7 (16...Qg7 17.e4+=) 17.e4 de4 18.Ne4 Nd4? (better is 18...h3!? 19.b5 Na5 20.Ng4 hg2+/–) 19.cd4+– Bd4 20.Bd4 Rd4 21.Red1 (better is 21.Ng4 h3 22.b5+–) 21...Be4?? (better is 21...Nh6+–) 22.Be4 Re4 (22...Rd1 23.Rd1 Qd7 24.Rd7 Kd7 25.Qc6 Kd8 26.Ng4 Nf6 27.Qe6 Nd7+–) 23.Qe4 (23.Qc6 Re1 24.Re1 h3 25.Ra8) 23...Nf6 (23...Qd6 24.Rd6 cd6 25.Qa8 Kd7 26.Ra7) 24.Rac1 (24.Qa8) 24...Ne4–+ 25.Re1 (25.Ng4 h3 26.Rc4 hg2–+) 25...Nd6 (better is 25...Nf2!? 26.Kf2 g3 27.Kg1 gh2 28.Kh1–+) 26.Red1 (26.Ng4 Qg7 27.Ra1 Rh5–+) 26...Rf8 (26...g3 27.Ng4–+) 27.Rd2 (27.Ng4 Rf4 28.Ne5 Qg5 29.Rd6 h3–+) 27...g3 28.Nf3 (28.fg3 Qg5 29.Ra1 Qe3 30.Kh1 Ne4–+) 28...Rf3! 29.gf3 Nf5 (29...h3 30.Rdc2 Qg5 31.Rc7 Kd8 32.R7c2 h2 33.Kg2 gf2 34.Kf2–+) 30.fg3 (30.Rdc2 Qb4 31.Rc7 Kd8 32.fg3 Qd4 33.Kg2 Qd2 34.Kh3 Qf2 35.Rc8 Ke7 36.R1c7 Kd6 37.Rc6 Kd5–+) 30...Ng3 (30...Qb4 31.Rdc2 Qd4 32.Kh1 Ng3 33.Kh2–+) 31.Rg2 (31.Rc4 b5 32.Rc5 Qg7–+) 31...e5 (31...Qb4 32.Rgc2 c5 33.Kg2–+) 32.Rcc2 (32.Rc4 b5 33.Rg4 c5–+) 32...e4 (32...Qb4!? 33.Kh2–+) 33.fe4 Ne4 (33...Qb4 34.Kh2–+) 34.Rge2 (34.Rb2–+) 34...h3 35.Kf1 (35.Re1 Qg5 36.Kh1 Nd2 37.Rd2 Qd2–+) 35...h2 (better is 35...Ng3 36.Kf2 Ne2 37.Re2 Qb4–+) 36.Rh2 Qe5 (better is 36...Qb4 37.Rh8 Kb7 38.Rch2–+) 37.Rhf2 (37.Ra2–+) 37...Nf2 38.Rf2 Qd6 39.Rf8 (39.b5 Qd1 40.Kg2 Qd5 41.Kg3 Qb5–+) 39...Kb7 (better is 39...Qf8 40.Ke2–+) 40.Rf7 (40.Re8 Qb4 41.Kg2 c5–+) 40...Kc6 (better is 40...Qd3 41.Kf2 Qc2 42.Ke1 Qb1 43.Ke2 Qa2 44.Kd3 Qf7 45.Kc3–+) 41.Rf6 (41.Rf3–+) 41...Qf6 0–1. Fournier,Frederic (1860) – reyna2012, Active blind, 2011.

2.c3 Nf6

3.d3 d5 4.Qa4 e5 5.Bg5 Bf5 (5...h6 6.Bh4–/+) 6.a3 (6.e4 Be6=) 6...Bd6 (6...h6 7.Bh4+=) 7.f3 (7.e4 de4 8.de4 Be4+=) 7...0–0 8.g4 b5 (better is 8...Bd7–/+) 9.Qb5= Bd7 10.Qb7 (better is 10.Bf6 Qf6 11.Qd5=) 10...Rb8–/+ 11.Qa6 Rb6 12.Qa4 Nb4 13.Qd1 Nc6 14.Qa4 Ne7 15.Qa7 Rb2?? (better is 15...Bb5 16.Bf6 gf6–+) 16.Qa6?? (16.Bf6!? gf6 17.e4=) 16...Bb5 (better is 16...Qb8 17.Bf6 gf6–+) 17.Qb7 Nc6 18.Nh3?? (18.a4 Qa8 19.Qa8 Ra8+=) 18...Re8 (18...Na5 19.Bf6 Qf6 (19...Nb7?! 20.Bd8 Rd8 21.Bg2+=) 20.Qd5 c6–+) 19.Nd2? (better is 19.Bc1 Na5 20.Qa7=) 19...Ba3?? (better is 19...Qe7 20.Ra2 Rd2 21.Qb5 Ra2 22.Qc6 Rb8–+) 20.Ra3+– Qd6 21.Ra8 Rd2?? (21...Nd8 22.Qa7 Bc6+–) 22.Re8 (better is 22.Bf6!? Ra8 23.Qa8 Qf8 24.Qf8 Kf8 25.Bg7 Kg7 26.Kd2 Ba6+–) 22...Ne8 23.Kd2 (23.Qb5?! Ra2+–) 23...Bc4 (23...Nd4 24.f4 Nb3 25.Ke1 Qc5+–) 24.Qc8 Nd8 (24...Kf8 25.dc4 h6 26.Bh4+–) 25.Qd8 Qd8 26.Bd8 (26.dc4?! f6 27.Bh4 Qa8+=) 26...Bb5 27.Bg2 c5 (27...Bd7 28.Ra1+–) 28.Bb6 c4 29.dc4 (better is 29.f4!? cd3 30.fe5 de2 31.Bd5 h6+–) 29...Bc4 30.Ra1 h5 (30...f6 31.Ra7+–) 31.Ra8 Bb5 32.gh5 Bc6 33.Rb8 (33.Rc8 Bd7 34.Rd8 Ba4+–) 33...Bb5 (33...f6 34.Nf2 Kf7 35.Bh3+–) 34.Bd4 ed4 35.Rb5 dc3 36.Kc3 d4 37.Kd3 (better is 37.Kd4 f6+–) 37...Nd6 38.Re5 (better is 38.Rb8!? Kh7+–) 38...g6 39.hg6 fg6 40.Ra5 Nf5 41.Rf5! gf5 42.Kd4 Kf7 43.e3 Kg7 44.Nf2 (44.Ke5 Kg6 45.Nf4 Kf7 46.Kf5 Ke7+–) 44...Kf7 45.h3 Kg7 46.e4 fe4 47.f4 Kg8 48.Ng4 Kf8 49.Nf6 (better is 49.Be4!? Ke8 50.h4 Kf8+–) 49...e3 50.Ke3 Ke7 51.Ng4 Kf8 52.f5 Kg8 53.f6 Kh8 54.Bc6 (54.Bd5 Kh7 55.Ne5 Kh6 56.f7 Kg7 57.Nd7 Kg6 58.f8Q Kh5 59.Qf5 Kh6 60.Qf6 Kh5 61.Bf3) 54...Kg8 If Black now only could play h4... 55.Kd3 Kh8 56.Kc2 (56.Ne5 Kg8 57.Bd5 Kh7 58.f7 Kh6 59.f8Q Kg5 60.Nf3 Kg6 61.Be4 Kh5 62.Qh8) 56...Kg8 57.Ne3 (57.Bd5 Kf8 58.h4 Ke8 59.f7 Ke7 60.h5 Kd6 61.f8Q Kd5 62.h6 Kc6 63.h7 Kb5 64.Qf5 Kc6 65.h8Q Kb7 66.Qhc8 Kb6 67.Qfc5) 57...Kf7 58.Ng4 Ke6?? (58...Kg8 59.Bd5 Kf8 60.h4 Ke8 61.f7 Ke7 62.h5 Kd6 63.f8Q Kd5 64.Qf5 Kc6 65.h6 Kb6 66.h7 Kc7 67.Qc5 Kd7 68.h8Q Ke6 69.Qe8) 59.Be8+– Kd6 60.h4 Ke6 61.Bh5 (61.f7 Ke7 62.Ne5 Kd6 63.f8Q Ke5 64.h5 Ke6 65.h6 Kd5 66.h7 Kd4 67.h8Q Kd5 68.Qf5 Kd6 69.Qhe5) 61...Kd7 62.Nh6 Ke6 (62...Kc7 63.f7 Kb6 64.Nf5 Kb5 65.Be2 Kb6 66.f8Q Kc7 67.Qd6 Kb7 68.Bf3 Ka7 69.Qc7 Ka6 70.Be2) 63.Ng4 (63.Ng8 Kd5 64.f7 Kc6 65.Bf3 Kb6 66.f8Q Kc7 67.Qc5 Kd7 68.Bg4 Ke8 69.Qe7) 63...Kd7+– 64.f7 (better is 64.Bg6 Kd6+–) 64...Ke7 65.Nf6! Kf8 (65...Kf6 66.f8Q Combination) 66.Kb2 (66.Nh7 Ke7 67.f8Q Kd7 68.Qc5 Kd8 69.Bg4 Ke8 70.Qf8) 66...Kg7 (66...Ke7 67.Nh7 Kd6 68.f8Q Kd5 69.Bf3 Kd4 70.Qe8 Kc4 71.Qc6 Kb4 72.Be2 Ka5 73.Qb5) 67.Nd7 Kh7 (67...Kh6 68.Bf3 Kg7 69.f8Q Kg6 70.h5 Kh7 71.Be4) 68.Bf3 Kg7 69.f8Q Kh7 (69...Kg6 70.h5 Kh7 71.Be4) 70.Be4 1–0. Chad's Chess – Pyotr Amateur v0., WBEC2_4thDivision, 2002.

3.e3 a6 4.Bb2 e5 5.Nf3 d6 6.d3 Bd7 7.Be2 Qe7 8.Nbd2 g6 9.0–0 Bg7 10.Qc2 0–0 11.Rfe1 Rab8 12.Rad1 Qe8 13.e4 b6 14.Nb3 a5 15.a3 ab4 16.ab4 Ne7 17.Ra1 c5 18.bc5 bc5 19.Rab1 Nc6 20.Nbd2 Ra8 21.c4 (21.d4 ed4 22.cd4 cd4 23.Nd4 Nd4 24.Bd4 Be6+/–) 21...Rb8 22.Bc3 Rb1 23.Rb1 Be6 24.Bf1 Qd7 25.h3 Qc7 26.Nb3 Rc8 27.Nbd2 Bf8 28.Be2 Rb8 29.Rb8 Nb8 30.Qb1 Qd8 31.Bf1 Qe7?? (31...Bh6 32.Qb5=) 32.Qb5 (better is 32.Qb8 h6 33.Ba5+–) 32...Nbd7= 33.Nb3 h5 (33...Bh6 34.Na5=) 34.Bb2 Ne8 35.Ba3 Ndf6 36.Bc5?? (better is 36.Bc1+=) 36...dc5–+ 37.Nc5? (better is 37.Ne5 Qc7 38.Nf3–/+) 37...Qc5 38.Qc5 Bc5 39.Nd2 (39.Ne5 Nd6–+) 39...Bf8 40.Nb3 Nd6 (40...Nd7 41.Be2–+) 41.Kh1 (41.f4 Nd7 42.fe5 Ne5–+) 41...Nc4! 42.dc4 Bc4! 43.Bc4 Nd7 (better is 43...Ne4!? 44.Kg1 Bb4–/+) 44.Bf1 Be7 45.g3 Nf8 46.Bg2 Kg7 47.Nc1 Bf6 48.Nd3 Ne6 49.Bf1 Nd4 50.Kg2 Be7 (50...Kf8 51.Nb4=) 51.f4 (better is 51.Ne5!? g5 52.Nd7+/–) 51...ef4= 52.gf4 Nf5?? (better is 52...g5=) 53.ef5+– gf5 54.Kf3 Bf8 (54...Kf6 55.Ne1+–) 55.Ne5 f6 56.Nc4 (56.Nd3 Bd6+–) 56...Kh6 (56...Bc5 57.Bd3+–) 57.Bd3 (57.Ne3 Bc5+–) 57...Bg7 (57...Bc5 58.Bf5 Kg7 59.Ke4+–) 58.Ne3 h4 (58...Kg6 59.Nf5 Kf7 60.Ng3+–) 59.Bf1 Kg6 60.Bd3 Bh8?? (60...Kh6 61.Nf5 Kg6 62.Nh4 Kh5+–) 61.Bf5 (61.Bf5 Kf7 62.Be4+–) 1–0. Fournier,Frederic (1915) – vicente222 (1805), Active blind, 2011.

2.e4 e5

3.a3 Nf6 4.d3 (4.Nc3 d5 5.ed5 Nd5=+) 4...Bd6 (4...d5 5.ed5 Nd5 6.Nf3=+) 5.Bb2 b6 (5...a5 6.b5 Nd4 7.Nf3 Nb5 8.Ne5 Be5 9.Be5+=) 6.c4 Bb7 7.Nf3 Qe7 8.Be2 a6 9.0–0 Ng4 (9...0–0 10.Re1=) 10.h3 (10.Nc3 0–0+=) 10...Nf6 11.Nbd2 (11.Nc3 Nd4+=) 11...a5 (11...0–0!?=) 12.b5+– Na7 13.d4 ed4 14.Nd4 Be5? (better 14...g6+–) 15.Rb1?? (better 15.Nf5 Bb2 16.Ne7 Ba1 17.Qa1 Ke7 18.Qe5 Kd8 19.Qg5+–) 15...Ne4= 16.Ne4 Be4 17.Bd3 Bd3 18.Qd3 0–0 19.Nf5 Qf6 20.Qd7?? (better 20.Be5 Qe5 21.Rfe1+=) 20...Qf5?? (better 20...Bb2 21.Ne7 Kh8–/+) 21.Qf5+– Bb2 22.Rb2 Rae8 (22...Rad8 23.Re1+–) 23.Qf3 (23.Qd7 Nc8 24.Qc7 Re7+–) 23...Nc8 24.Re2 Ne7 (24...Rd8+–) 25.Rfe1 1–0. alaindubleu (1640) – Anonymous, lichess.org, 2016.

3.Nf3 (3.b5!? Nd4 4.c3=) 3...Bb4–/+ 4.c3 Bc5 5.Bb5 Na5 (5...a6 6.Bc6 dc6 7.Ne5+=) 6.Ne5 c6 (6...Qg5 7.0–0 Qe5+=) 7.Bd3 (7.Be2 Nf6 8.d4 Be7=) 7...Qf6 (better is 7...Qg5!? 8.Ng4 d5–/+) 8.Ng4 Qf4 9.f3 d6 (9...d5 10.Be2 d4= (worse is 10...de4 11.d4 Qd6 12.dc5 Qd1 13.Bd1+–)) 10.Bc2 Qg5? (10...Bg4 11.d4 Bf3 12.Bf4 Bd1 13.Kd1 Bb6+=) 11.d3?? (better is 11.d4 Qh5 12.dc5 Bg4 13.fg4 Qc5 14.Qd4 Qd4 15.cd4+–) 11...Qh4= 12.g3 Qh3 13.Bf4 Qg2 14.Rf1 h5 15.Rf2?? (better is 15.Nf2+=) 15...Bf2–+ 16.Kd2?? (better is 16.Nf2 Qg1 17.Ke2 Qh2 18.Qc1–+) 16...Bg3 17.Kc1 Bf4 18.Kb2 hg4 19.fg4 Bg4 20.Qe1 Bh2 (20...Rh2 21.Na3–+) 21.a4 Bg3 22.Qd2 Qd2 (22...Qg1 23.Qg5 Be5 24.Ra3–+) 23.Nd2 Rh2 (23...Nf6!? 24.Nf1 Bf4 25.Bd1–+) 24.Nf1 Rh3 25.Ng3 Rg3 26.d4 Nc4 27.Kb3 Be6 28.Re1 Na5 29.Kb2 Nc4 30.Kc1?? (30.Kb3 Nf6 31.Re2–+) 30...Rc3–+ 31.d5 Ne3 (31...Bd7 32.a5–+) 32.Re2 Bg4 (better is 32...cd5 33.ed5 Bg4 34.Kb2–+) 33.Re1 Nc2 34.dc6 Ne1 35.Kd2 Rc2 (35...Rd3 36.Ke1 bc6 37.Kf2 Rb8 38.Kf1 Rb2 39.a5 Rd1) 36.Ke1 (36.Ke3 Re2 37.Kd4 bc6 38.e5 de5 39.Kc5 Rc2 40.Kb4 a5 41.Ka3 0–0–0 42.Kb3 Rd3) 36...bc6 37.a5 (37.Kf1 Rb8 38.a5 Rb1) 37...Rb8 38.e5 Rb1 0–1. allknight – kiwi phill, ChessWorld.net, 2011.

2.a3 a5

3.b5 Nb8 4.a4 d5= 5.Nf3 Nf6 6.d4 (6.e3 Bg4=) 6...e6 (6...Bf5 7.Nh4 Bg4 8.h3=) 7.e3 Nbd7 (7...c5 8.dc5 Bc5 9.Bd3=) 8.Bd3 (8.Ba3 Ba3 9.Na3 Qe7=) 8...Bb4 9.Nbd2 (9.c3 Bd6=) 9...0–0 (9...Ne4 10.c4=) 10.0–0 c5 11.bc6 (11.c4 cd4 12.ed4 b6=) 11...bc6 12.Bb2 (12.c4 c5=) 12...Qc7 (12...Ba6 13.c4=) 13.Qe2 (13.Rb1 Ba6=) 13...Rb8 14.Rfb1 Bb7 15.Ra2 Bd6 16.e4 (16.Nb3 Ne4=) 16...de4 17.Ne4 c5 (17...Ne4 18.Qe4 Nf6 19.Qh4=) 18.Nd6 Qd6 19.Rd1 (19.dc5 Nc5 20.Bb5 Ng4=) 19...Bf3 (19...Qf4 20.Ne5=) 20.Qf3 cd4 (20...Rfd8 21.dc5 Qc5 22.Ba3=) 21.Bd4+= Rb7?? (21...Qd4 22.Bh7 Double attack) 22.Qb7+– (22.Qb7 e5 23.Bc3+–) 1–0. Klaus Behrmann – byron_de, ChessWorld.net, 2003.

3.c3 ab4–/+ 4.cb4 Nb4! 5.Bb2 (5.ab4 Ra1) 5...Nc6 6.Nf3 e6 7.d4 Nf6 8.e3 d5 9.Bb5 Bd7 10.Bc6 Bc6 11.0–0 Bd6 12.Nc3 0–0 13.Re1 Ne4 14.Nd2? (better is 14.Ne5–+) 14...Bh2! 15.Kf1 (15.Kh2 Qh4) 15...Nc3 16.Bc3 Bb5 17.Re2 Be2 18.Qe2 Qf6 19.Qf3 Qg6 20.Bb4 Bd6 21.Bd6 cd6 22.Rb1 Ra3 23.Rb7 (23.Qd1–+) 23...Qd3 24.Qe2 Ra1 (24...Ra1 25.Rb1 Rb1 26.Nb1 Qb1 27.Qe1 Qc2–+) 0–1. chessH – byron_de, ChessWorld.net, 2003.

3.b5 Na7

4.a4 c6 5.e3 d6 6.Bb2 Bd7 7.Nc3 g6 (7...e5 8.Nf3=) 8.Nf3 Bg7 9.Rb1 Nf6 10.Bd3 (10.Ne4 cb5 11.Bf6 Bf6 12.Nf6 ef6 13.ab5 0–0+=) 10...0–0= 11.0–0 Rc8 12.b6 (12.Qe2!?=) 12...Qb6=+ 13.Nd5 Qd8 (worse 13...Nd5 14.Bg7 Qc7 15.Bf8 Rf8 16.c3+–) 14.Nf6 ef6 15.Bd4 c5 16.Rb7 cd4 17.Ra7 de3 18.fe3 Ba4 19.Qa1 Qb6 (better 19...Bc2 20.Bc2 Rc2 21.Ra5 f5=+) 20.Ra6+– Qb4 21.Rb1 Qg4 22.h3 (better 22.Nd4 Qd7 23.Ra5+–) 22...Qg3?? (better 22...Qd7=) 23.Qa4+– Rb8 (23...f5 24.Ra5 Be5 25.Ra7+–) 24.Rb8 Rb8 25.Qa2 f5 26.Ra5 f4 (26...Rf8 27.Bc4 Bf6 28.Ra8 Ra8 29.Qa8 Kg7 30.Qd5+–) 27.Ra8 (better 27.Rg5 Bf6 28.Rg3 fg3+–) 27...Ra8 28.Qa8 Bf8 29.Qe4 (better 29.Bc4!? fe3 30.de3 d5 31.Qd5 Qc7+–) 29...fe3 30.Qe3 (30.de3!? d5 31.Qd5 Qc7+–) 30...d5 31.Qf2 (31.Bb5 Qc7 32.Qb3 Qd6+–) 31...Qc7 32.Kh1 Bd6 33.Ng5 (33.Qd4 Qc6+–) 33...Bg3 (33...h6 34.Nf3+–) 34.Qf1 (34.Qf3!? Bf4 35.Qd5 Bd2+–) 34...h6 35.Nf3 Qf4 36.c4 Qd6 37.cd5 Qd5 38.Bc4 Qd7 39.Bf7 (better 39.d4+–) 39...Qf7+– 40.Qe2 Qd7 41.Qf1 Qf5 (41...Qf7!?=) 42.d4+– Qe4 43.Qc4 Kg7 44.Qf1 Kf6 (44...Kg8!?=) 45.Ng1 (45.Ne5 Kg5 46.Nf7 Kh4+–) 45...Qf5 46.Nf3 Qf4 (46...Qe4!?=) 47.Qe2 Qe4?? (47...Qc1 48.Ng1 Bd6+=) 48.Qf1 (better 48.Qe4 g5 49.d5+–) 48...Qe3 (48...Qf4 49.Qa6 Qd6 50.Qd6 Bd6 51.g4+–) 49.Nd2 (better 49.Ne5 Kg5 50.Nf7 Kh4 51.Qd1+–) 49...Qf2?? (better 49...Kg7 50.Nf3 Kf6=) 50.Qf2 (better 50.Ne4 Kg7 51.Nf2+–) 50...Bf2 51.Ne4 Ke6 52.Nf2 Kd5 53.Ng4 Kd4 (53...h5 54.Ne5 Kd4 55.Ng6+–) 54.Nh6 Ke5 55.Nf7 (55.Ng4 Ke6+–) 55...Kf4 (55...Kf6 56.Nh8 g5+–) 56.Ng5! Kg5 57.g3 Kf5 58.Kg2 Kg5?? (better 58...g5+–) 59.Kf3+– Kh5 (59...Kf5 60.h4 g5 61.g4 Kf6+–) 60.g4 (60.Kf4 Kh6 61.g4 Kg7+–) 60...Kg5?? (60...Kh4 61.Ke4=) 61.h4 (better 61.Kg3 Kf6 62.Kh4+–) 61...Kh4= 62.Kf4 g5?? (better 62...Kh3=) 63.Kf5+– Kh3 64.Kg5 Kg3 65.Kf5 Kf3 66.g5 Kg3 67.Kf6 Kf3 68.g6 Ke3 69.g7 Kf3 70.g8Q Ke3 71.Qg5 Kf3 (71...Kd4 72.Qe5 Kc4 73.Qe4 Kc5 74.Ke5 Kb5 75.Qd5 Ka4 76.Qb7 Ka5 77.Kd4 Ka4 78.Kc4 Ka5 79.Qb5) 72.Qf4 (72.Ke5 Kf2 73.Ke4 Ke2 74.Qg2 Ke1 75.Ke3 Kd1 76.Qd2) 72…Kf4= ½–½. TwelveTeen (2510) – littleplotkin (2425), lichess.org, 2016.

4.a4 d5 5.e3 (5.Nf3 Nf6=) 5...e6 (5...e5!?+=) 6.Bb2= Nf6 7.Nf3 c6 (7...Bd6 8.Bc3=) 8.Nc3 Qb6 9.Rb1 c5 10.Ne2 (10.Be2 d4 11.Na2 de3 12.fe3 Be7+=) 10...Bd7 (10...Bd6 11.Bf6 gf6 12.d4=) 11.Ng3 (11.Ne5 Rd8+=) 11...Bd6= 12.Be2 Qd8 (12...0–0 13.Bf6 gf6 14.0–0+=) 13.0–0 Qb8 (13...0–0 14.Be5 Qb6 15.Bf6 gf6 16.Nh5+=) 14.Nh4 (14.Bf6 gf6 15.Nh5 Qd8+/–) 14...Nc8 15.f4 b6 (15...Nb6 16.Bf6 gf6 17.Nh5=) 16.Nh5 (better is 16.Bf6 gf6 17.Nh5+=) 16...Be7?? (better is 16...Nh5 17.Bh5 0–0+=) 17.Ng7+– White begins to deal mighty blows 17...Kf8 (17...Kd8 18.Be5 Nd6 19.Nh5 Nh5 20.Bh8+– (20.Bh5?! f6 21.Bb2 Kc8+/–)) 18.Nh5 d4 19.Nf6 Bf6 20.Qe1 (20.Nf3 Kg7+–) 20...Nd6 (20...Rg8 21.Bf3 Ra7 22.Be4+–) 21.Nf3 Ne8 (21...Nf5+–) 22.ed4 Qc7 (22...Qf4 23.Ne5 Be5 24.Rf4 (24.de5 Qa4 25.Bf3 Ra7+–) 24...Bf4 25.dc5+–) 23.Ne5 Rg8 24.dc5 (24.Ba3 Rd8+–) 24...Qc5 25.Qf2 (25.Qf2 Qf2 26.Kf2+–) 1–0. Rosinski,Zenon – Nowakowski,Jozef, corr 1AMM Poland, 1991.

4.e4 Nf6 5.Nc3 d5 6.ed5 Nd5 +=.

3.b5 Nd4

4.a4 Nf6 5.Bb2 Nf5 6.Bf6 (6.Nf3 d5=) 6...ef6 7.e4 Nh4 (7...Qe7 8.Nc3=) 8.g3 Ng6 9.Nf3 Bb4 10.c3 Be7 11.d4 d5 12.ed5 Qd5 13.Bg2 Qe4 14.Qe2 Qe2 15.Ke2 0–0 16.Nbd2 Bd7 (16...Re8 17.Rae1=+) 17.c4 Bb4 18.c5 (18.Rhe1 Bc3=) 18...Rfe8=+ 19.Kf1 Black launches an attack 19...Rad8 20.Nc4 Bg4 21.Rd1 (21.Rc1 Be6–/+) 21...Ne5!–/+ 22.Nce5 (22.de5 Rd1) 22...fe5 23.Re1? (23.h3 Bf3 24.Bf3 ed4 25.Bb7 Bc5 26.Bc6=+) 23...Be1–+ 24.Ne1 ed4 (24...Rd4?! 25.Bb7 Rb8 26.Bc6–+) 25.Bb7 d3 26.Nd3 Rd3 27.c6 (27.Kg2 Re7 28.Rc1–+) 27...Bh3 28.Kg1 Rd1 (28...Re1) 0–1. Kunk – mikekelly666, ChessWorld.net, 2005.

4.Bb2 Nb5+= 5.c4 (5.e4 Nd6 6.Nc3 Rb8=) 5...Nd6 6.e3 e6 7.Nc3 (7.Nf3 Nf6+=) 7...g6 (7...b6 8.d4+=) 8.Nd5 (8.c5 Nf5=) 8...f6 (8...ed5 9.Bh8 f6 10.Qf3+=) 9.Nf4 (9.Nc3 b6+=) 9...b6 10.Nf3 (10.d4 Bb7+=) 10...e5 11.Ne2? (better is 11.Nd5!?–/+) 11...Nc4–+ 12.Bc3 (12.Bc1 e4 13.Nfd4 Bb7–+) 12...Na3 (12...Ba3?! 13.Neg1 Nd2 14.Nd2=) 13.d4 Nc4 (13...Bb7 14.de5 Bf3 15.gf3–+) 14.Ng3 (14.de5 Ba6–/+) 14...Ba6 (14...d5 15.de5 Ba6 16.ef6 Nf6 17.Bc4 Bc4 18.Ne5–/+) 15.de5–/+ Bg7 16.ef6 Bf6 (16...Nf6 17.Qa4 Nd6 18.Ba6 Ra6 19.Qb3–+) 17.Qc2 (17.Bf6 Nf6 (17...Qf6?! 18.Rc1 Ne5 19.Rc7 Nf3 20.gf3+=) 18.Qc2 d5–+) 17...d5 18.Be2 (18.Bc4 Bc4 (18...dc4?! 19.Ne4 Bb7 20.Qa4 c6 21.Qc4=) 19.Ne5 Bb5–/+) 18...Qe7 (18...Bc3!? 19.Qc3 Qf6 20.Qc1–+) 19.0–0 Ne3 (19...Bc3 20.Qc3 Qf6 21.Qb3–/+) 20.Qa4 Kd8 (better is 20...Qd7 21.Bf6 Nf6 22.fe3 Qa4 23.Ra4 Be2 24.Ne2 b5–/+) 21.Bf6+= Nf6 22.Nd4 Qe8 23.Qe8 (better is 23.Nc6 Kd7 24.fe3 Qe3 25.Kh1 Be2 26.Rf6+/–) 23...Re8 (23...Ne8 24.fe3 c5 25.Nc6 Kc7 26.Ne5+=) 24.fe3+= Ne4 (24...Ke7 25.Nc6 Ke6 26.Rac1=) 25.Ba6 Ra6 (25...Ng3 26.hg3 Ra6 27.Rf7=) 26.Ne4 Re4 (worse is 26...de4 27.Rf7+/–) 27.Nc2?? (27.Rf7 Kc8=) 27...b5 (27...Ke7 28.Rad1 Re5 29.Kf2–/+) 28.Rfd1? (better is 28.Rfb1!? c6 29.Nb4=) 28...c6–/+ 29.Rd4 Rd4 (29...Kc7 30.Re4 de4 31.Rd1–/+) 30.ed4 Ke7?? (30...Kc7 31.Nb4 Ra8 32.Nd3–/+) 31.Kf2?? (better is 31.Nb4! Rb6 32.Ra5+–) 31...Kd6 (31...Ra8 32.Ke3–/+) 32.Nb4 (32.Ke3 Ra7+=) 32...Ra8 33.Nd3 a4 34.Ra3 (34.Ra2 g5–/+) 34...Rf8 35.Ke2 (35.Kg3 g5–/+) 35...Re8 36.Kd2 (36.Ne5!?–/+) 36...Re4–+ 37.Kc3 Re2 38.Nf4 (38.g3 Rh2 39.Kb4 Rc2–/+) 38...Rf2 39.g3 Rh2 40.Kb4 Rb2 (40...g5!? 41.Nd3–+) 41.Ka5 Rb3 42.Rb3 ab3 43.Nd3 h5 44.Kb4 g5 45.Kb3 h4 46.g4 h3 47.Nf2 h2 48.Kc3? (better is 48.Kb4–/+) 48...c5–+ 49.dc5 Kc5 50.Nd3 Kd6 51.Nf2 Ke5 52.Kd3 b4 53.Ke3 b3 (53...b3 54.Kd2 Kf4 55.Nd3 Kf3–+) 0–1. Vandenburg,V – Thomas,J, Westland, 1985.

4.e3 Ne6 5.Bb2 Ng5 6.f4 Ne4 7.Nf3 h5 8.d3 Nc5 9.Be2 h4 (10.0–0 d5+/–). rampantpawn – mikekelly666, ChessWorld.net, 2005.

4.e3 Nf5 5.Bb2 =.

4.e3!? Nf5 5.e4 +=.

4.e3 Nf5 5.Nf3 d5 6.Bb2 Nf6 7.c4 dc4 8.Bc4 Nd6 9.Be2 Bd7 10.Nc3 Nfe4 11.Ne4 Ne4 12.0–0 e6 13.Qc2 Ng5? (13...Nd6 14.a4+=) 14.Rac1 (14.Ng5 Qg5 15.Qc7 Qd5+–) 14...c5? (14...Nf3!? 15.Bf3 Bb5 16.Bb7 Rb8 17.Bc6 Bc6 18.Qc6 Qd7=) 15.bc6! Bc6 (15...bc6 16.Ne5 Decoy; 15...Bc6 16.Ne5 Decoy) 16.Qd1 (16.Ne5!? Qd5 17.Nc6 Qc6 18.Qc6 bc6 19.Rc6+–) 16...Bd6 17.h3 (17.Bg7!? Rg8 18.Bb2+=) 17...0–0= 18.d4 Nf3 19.Bf3 Rb8 20.Rb1 Qd7 21.Bc6 bc6 22.Qc2 Bc7 23.Rfc1 Qd6 24.g3 Rfe8 (better is 24...Rb6!?=) 25.Qc6+/– Qc6 26.Rc6 Rec8 (26...Bd8 27.Rc2+/–) 27.Rcc1 (27.e4 Kf8+/–) 27...Bd6 28.Rc8 Rc8 29.Rc1 Rc1 30.Bc1 Kf8 31.Kf1 Ke7 32.Ke2 Kd7 33.Kd3 Kc6 34.Kc4 Kb6 35.a4 Bb4 36.f3 g6 37.e4 h5 38.g4 hg4 39.hg4 Be7 40.f4 (40.d5 ed5 41.ed5 Bd8+–) 40...Bd6 41.f5 gf5 42.gf5 ef5 43.ef5 Bg3 (43...Kc7 44.d5+–) 44.Bd2 Bc7 45.d5 Bd6 46.Be3 Ka6 47.Bc5 Bg3 48.d6 Kb7 49.Kb5 Be1 (49...Be5+–) 50.Bb4 (better is 50.Bb6+–) 50...ab4 (worse is 50...Bb4 51.f6 Bd6 52.Ka5–+) 51.Kc4 Kc6 52.a5 Kd6 53.a6 Kc7 0–1. Fournier,Frederic (1805) – koeneman (1680), Active, 2011.

3.b5 Ne5

4.d4 Ng4 5.h3 N4f6 6.a4 (6.Nf3 d5=) 6...Ne4 7.e3 e6 8.Bd3 Bb4 9.Ke2 (9.Bd2 Nd2 10.Nd2 d5=) 9...Ngf6 10.Bb2 d5 11.c3 Bd6 12.Nf3 0–0 13.Ne5 Be5 14.Re1?? (better is 14.de5 Nd7 15.Be4 de4 16.Qd4=+) 14...Bd6–+ 15.Kf1 c5 16.Re2 b6 17.Be4 Ne4 18.Nd2 Nd2 19.Qd2 Bb7 20.Kg1 Qf6 21.Bc1 Be7 22.dc5 Bc5 23.Bb2 e5 24.Kh1 Qh4 25.f3 Rac8 26.c4 e4 27.fe4 dc4 28.Qc3 Qg3 29.Qc4 Bd6 30.Qd4 (30.e5 Rc4 31.ed6 Qd6 32.Rf2–+) 0–1. ahmed sharkawy_1 – mikekelly666, ChessWorld.net, 2005.

4.e3 d5 5.Bb2 Ng6 6.h4 Nf6?? (better 6...e6 7.h5 Nh4=) 7.h5+– Ne5 (7...Bg4 8.Be2 Bh5 9.Bh5 (9.Rh5?! Nh5 10.Bh5 c6+=) 9...Nh5 10.Rh5+–) 8.Be5 e6 9.h6! Bd6 (9...gh6 10.Nc3 Decoy) 10.hg7 Rg8 11.Bb2 (11.d4 Rg7 12.Nf3 Be5 13.Ne5 Ne4+–) 11...Rg7 12.Qf3 (better 12.Nf3 Qe7+–) 12...Rg6 (12...e5 13.Qe2+–) 13.Nh3 (better 13.Bd3 Ne4 14.Rh7 Ng5 15.Rh8 Bf8+–) 13...e5 14.Nc3 (better 14.Qd1+–) 14...Ne4?? (better 14...Bg4 15.Qg3 d4+–) 15.Ne4 (worse 15.Nd5 Nc5 16.d4 e4+–) 15...de4 16.Qe4 Re6 (16...f5 17.Qd5 Qe7 18.Be2+–) 17.Qh7 Qe7 18.Bc4 Rf6 (18...Rg6 19.Bd5+–) 19.Ng5 Qf8 20.Ne4 (better 20.Qe4 Bf5 21.Qb7+–) 20...Be6 (20...Rg6+–) 21.Nf6 Kd8 22.Be6 fe6 23.Qd7 1–0. FeegLood (2740) – arsenicistheansr, lichess.org, 2017.

3.d4 ab4

4.d5 Nb8 5.a4 (5.e4!?=+) 5...Nf6–/+ 6.e3 e6 7.de6 fe6 8.a5 (8.Bd3 d5–/+) 8...Bc5 9.Nf3 0–0 10.Nd4 (10.Nbd2 Nc6–/+) 10...Bd4 (10...Ne4 11.Nf3–+) 11.ed4 (11.Qd4 Nc6 12.Qh4 d6–/+) 11...Ne4 (better is 11...b6–+) 12.f3? (better is 12.Be3–/+) 12...Qh4–+ 13.Ke2 Nc6 14.Be3 Ng3! 15.hg3 Qh1 A pinning theme 16.d5 ed5 17.Qd5 Rf7 18.g4 (18.Nd2–+) 18...b6 19.c3 bc3 20.Nc3 Ba6 21.Kf2 (21.Nb5 Bb5 22.Qb5 Ra5 23.Ra5 ba5–+) 21...Bf1 22.Rf1 Qh4 23.Kg1 Ra5 24.Bf2 (24.Nb5 Qg3–+) 24...Rd5 25.Bh4 Rc5 26.Ne4 Ra5 27.g5 (27.Rc1 Ra2–+) 27...d5 28.g6 hg6 (28...de4?! 29.gf7 Kf7 30.Rc1–+) 29.Ng5 Re7 30.Rc1 (30.Rd1 d4–+) 30...Nd4 31.Bg3 Ne2 (32.Kh2 Nc1–+) 0–1. xCalvin – mikekelly666, ChessWorld.net, 2005.

4.d5 Ne5 5.e4 ba3 6.Na3 e6 7.Bf4? (better is 7.Bb2 Bb4 8.c3–/+) 7...Ng6 (7...Ra3?! 8.Ra3 Ba3 9.Be5+=; 7...Ba3?! 8.Be5 Nf6 9.Qd4–/+) 8.Be3 (8.Nb5 Ra1 9.Nc7 Qc7 10.Bc7 Bb4 11.Ke2 Rd1 12.Kd1–+) 8...e5 (8...Bb4 9.Ke2 Ra3 10.Ra3 Ba3 11.de6 fe6 12.Qa1–+) 9.Nf3?? (9.Nb5 Ra1 10.Qa1+=) 9...d6 (better is 9...Ra3 10.Ra3 Ba3–+) 10.Bg5 (10.Bb5 Bd7=) 10...f6 (10...Be7 11.Bb5 Bd7 12.Bd7 Qd7 13.Qb1+=) 11.Be3 Nf4 (11...c6 12.Bd3=) 12.Bf4 ef4 13.Nd4 (better is 13.Bb5 Kf7 14.0–0=) 13...Ra4?? (better is 13...c6 14.c3 Qe7+=) 14.Ndb5?? (better is 14.Bb5 Bd7 15.Ba4 Ba4 16.Ne6+–) 14...Re4–/+ 15.Be2 Qe7 (15...f3 16.gf3 Re7 17.0–0–/+) 16.f3 (16.Nc3 f3 17.Ne4 fg2+= (worse is 17...Qe4 18.gf3 Qb4 19.Qd2 Qd2 20.Kd2+=)) 16...Re5 17.Nc4 Re6?? (17...Rg5 18.Ra8 Qd8=) 18.Ra8 (better is 18.de6 Be6 19.Ra8 Kf7 20.Na5+–) 18...Re2+/– 19.Qe2 Qe2 20.Ke2 Kd8 (20...Kd7 21.Na7 Ne7 22.Kd3+/–) 21.Na7+– Kd7?? (better is 21...Ne7+–) 22.Rc8 (better is 22.Nc8 f5 23.Rb1+–) 22...Be7 (22...Ne7 23.Rb8 Nd5 24.Rb7 Be7+–) 23.Rb1 b6 (23...b5 24.Rb5 Bd8+–) 24.g3 (24.Nb6 cb6 25.Rb6 Bd8 26.Rb7 Ke8 27.Nc6 Ne7 28.Re7 Kf8 29.Rd8) 24...fg3 (24...Bd8 25.Ra8 (25.gf4?! Ne7 26.Rb8 Nd5+–) 25...Ne7 26.Rb5+–) 25.hg3 (25.Nb6 cb6 26.Rb6 Bd8 27.Rb7 Ke8 28.Nc6 Ne7 29.Re7 Kf8 30.Rd8) 25...h5 (25...Bd8 26.Ra8 Ne7+–) 26.Nb5 (26.Nb6 cb6 27.Rb6 Bd8 28.Rb7 Ke8 29.Nb5 h4 30.Nd6 Kf8 31.Rd8) 26...c6?? (26...Kc8 27.Ra1 h4 28.Ra8 Kd7+=) 27.Nb6 1–0. wee harv – West Islander, ChessWorld.net, 2011.

2.a3 a6

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

3.b5 ab5 4.a4 ba4 5.c3 b5 6.d4 Bb7 7.d5 Ne5 8.f4 Ng6 9.e4 Nf6 10.e5 Nd5 11.Bb5 Ndf4 12.Bf4 Nf4 13.Ba4 Ng6 14.Bd7 Qd7 15.Qd7 Kd7 16.Ra8 Ba8 17.Nf3 f6 18.ef6 ef6 19.0–0 Bc5 20.Kh1 Nf4 21.Rd1 Kc8 22.c4 Rd8 23.Nc3 Rd1 24.Nd1 Nd3 25.Nc3 Nf2 26.Kg1 Ne4 (26...Ne4 27.Kf1–+) 0–1. SieStein – RudeRocker, lichess.org, 2019.

3.d4 Nf6 =.

3.e3 d5 4.c4 (4.Nf3 Bg4=) 4...d4 (4...dc4 5.Bc4 Ne5 6.d3=+) 5.Bb2 (5.Nf3 Nf6=) 5...e5 6.ed4 ed4 7.c5 (7.Bd3 Bd6=) 7...Be7 (7...Qe7 8.Qe2 Be6 9.Nf3=+) 8.Bc4 (8.Nf3 Be6=+) 8...Bf6 9.d3 b5 (9...Ne5 10.Qe2=+) 10.Bb3 (10.cb6 cb6 11.Nd2 b5=) 10...a5=+ 11.Qe2 (11.Qd2 ab4 12.ab4 Ra1 13.Ba1 Qe7 14.Ne2 Bg4=+) 11...Nge7 12.ba5 (12.a4 ba4 13.Ba4 0–0=+) 12...Ra5 13.Qf3 Bb7 14.Nh3 Ra7 15.Qg4?? Ng6 16.0–0=+ Bc8 17.Qf3 Nge5 18.Re1 0–0 19.Qh5?? g6 20.Qe2 Re8 21.Qd2 Bd7 22.Bd5 Bh3–+ 23.Bc6 Re7?? (24.Bb5 Qd5+/–; better is 23...Nc6 24.Re8 Qe8 25.gh3 Qe5–+) 0–1. HMBCHESS2 – LOWKEY, Caissa.com, 2005.

3.e3 e5 4.Bb2 =.

3.e3 Nf6 4.c4 (4.d4 d5=) 4...d5 5.d4 Ne4 6.Bd3 Nf2? (better is 6...e5=) 7.Kf2+– dc4 8.Bc4 Qd6 (8...e5 9.Qf3 Be6 10.Be6 fe6 11.Qh5 g6 12.Qg4 ed4 13.Qe6 Qe7 14.Qe7 Ke7 15.ed4+–) 9.Nf3 Bg4 (9...Bf5 10.Rf1+–) 10.Nbd2 (10.Bf7!? Kf7 11.Ng5 Ke8 12.Qg4 Qg6+–) 10...Qf6 11.Rf1 e6 (11...e5 12.Ne4 Qg6 13.Neg5 Bf3 14.Nf3+– (< 14.Qf3 Qg5 15.Bf7 Kd8+–)) 12.Be2 (12.b5 Na5 13.Ne4 Qg6+–) 12...Bd6 13.Bb2 (13.Kg1 Qg6+–) 13...Bf3 14.Bf3 Bh2 15.Qc2 Qh4 (15...Ke7 16.Rac1+–) 16.Ke2 0–0 17.Rh1 Qg3 18.Ne4 Qh4 19.g3! Qh3 20.Ng5 Qh6 21.Ne4 f5?? 22.Nc5+– Rf7 23.Nb7 Ne7 24.Nd6! Nd5 25.Bd5 ed5 26.Nf7 Kf7 27.Qf5 Qf6 28.Qf6 Kf6 29.Rh2 h6 30.Rf1 Kg6 31.Rf4 a5 32.Rhh4 ab4 33.Rhg4 Kh5 34.Rg7 ba3 35.Rh4 (35.Rf5) 1–0. mgriffin (1730) – valerypavlovich, net–chess.com, 2001.

3.e4 Nf6 4.d3 e5 5.Nf3 d5 6.ed5 Nd5 7.Be2 Be7 8.0–0 0–0 9.c4 Nb6 10.Bb2 Bf6 11.Nc3 Re8 12.Nd5?? (better is 12.Ne4=) 12...Nd5–+ 13.cd5 Qd5 14.Nd2 Bf5 15.Nc4 Nd4 16.Re1 (16.Bg4 Bg6–+) 16...Ne2 17.Qe2 Bd3 18.Ne3 Qd6 (18...Be2 19.Nd5 Bd3 20.Nc7+=) 19.Qf3?? (better is 19.Qh5–+) 19...e4 20.Qd1 (20.Nf5 ef3 21.Re8 Re8 22.Nd6 Bb2 23.Ne8 Ba1 24.Nc7–+) 20...Bb2 21.Rb1 Bc3 (22.Rc1 Be1 23.Qe1 Rac8–+) 0–1. nandy conure – mikekelly666, ChessWorld.net, 2005.

2.a3 b5

3.Bb2 a5 4.g3 a4 (better is 4...ab4!? 5.Bg2 e5+=) 5.Bg2+= Ra6 6.c4 Rb6 (better is 6...bc4!? 7.b5 Rb6 8.Qa4 d5+=) 7.cb5+– Rb5 8.Qa4 Ra5?? (better is 8...Rb6+–) 9.ba5 Ba6 (9...Bb7+–) 10.Bc6. weBNimzo (2100) – ken40533, ChessWorld.net, 2003.

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

3.c3 a6 4.a4 Bb7 5.e4 =.

3.c3 d6 4.d4 (4.e4 a6+=) 4...e5 (4...a6 5.a4 Bd7 6.e4+=) 5.d5 (5.e4 a6+=) 5...Nce7 6.Nf3 (6.e4 Bd7+=) 6...Nf6 (6...e4 7.Nd4 Nd5 8.Nc6=) 7.Ng5 (better is 7.e4!? Bd7 8.Bd3+=) 7...h6=+ (< 7...Ned5 8.e4 Ne7 9.Bb5 c6 10.Bd3=) 8.Nf3 Nf5 (better is 8...Bd7=+) 9.e4+/– Ne4 10.Bb5 Bd7 11.Bd3 Nf6 12.Nbd2 (better is 12.0–0+=) 12...c5?? (12...Nd5!? 13.0–0 Be7=+ (< 13...Nc3 14.Qc2+/–)) 13.bc5 dc5 14.Ne5+/– Bd6 15.Nc6 Qa5?? 16.Na5+– 0–0 17.Nac4 Bc7 18.Ne4 Nd5 19.Nc5 Bb5 20.Qg4 Nd6 21.Nd7 Rfd8 22.Nde5 Re8 23.Bh6 Re6 24.Qg7 1–0. bsjostedt – brpalmer, net–chess.com, 2005.

3.e3 a6 4.Bb2 f6 (4...e5 5.Be2=) 5.c4+= bc4 6.Bc4 d5 (6...e5 7.Nc3+=) 7.Be2 (better is 7.Qh5!? g6 8.Qd5 Qd5 9.Bd5+–) 7...e6 8.Nf3 Bb7 9.Nc3 Nh6 10.0–0 g5 11.d4 Bd6 12.g3 (12.Rc1 g4 13.Nd2 f5+/–) 12...f5 13.Na4 a5 (better is 13...g4!? 14.Nd2 0–0+/–) 14.Nc5+– Bc5 15.dc5 (worse is 15.bc5 g4 16.Ne1 Ba6+=) 15...ab4?? (better is 15...Rg8+–) 16.Bh8 Ke7 (16...Nf7 17.Bb2 ba3 18.Ra3 Ra3 19.Ba3+–) 17.ab4 (better is 17.Bg7 Nf7 18.ab4 g4+–) 17...Nb4 (17...Qh8 18.b5 Ra1 19.Qa1 Qa1 20.Ra1 Nf7 21.bc6 Bc6+–) 18.Qd4 (better is 18.Ra8 Ba8 19.Qd4+–) 18...Nc2 (18...Qh8 19.Qb4 Bc6 20.Ra8 Qa8 21.Ng5 Qh8+–) 19.Bf6 (19.Qf6 Ke8 20.Bb5 c6 21.Bc6 Bc6 22.Qe6 Kf8 23.Qh6 Kf7 24.Ne5 Ke8 25.Qh5 Ke7 26.Qf7#) 19...Kf7 20.Bd8 (20.Ng5 Kg8 21.Ra8 Qa8+–) 20...Nd4 21.ed4 Rd8 22.Ng5 Kf6 23.f4 Rg8 (23...Bc8 24.Ra7 Rd7 25.c6+–) 24.Ra7 Rb8 (24...Bc8 25.Rc7 Ng4 26.h3+–) 25.Rb1 Nf7 26.Nf7 Kf7 27.Rbb7 Rb7 28.Rb7 h5 29.Rc7 Kf6 (29...Kg6 30.c6 h4 31.Rb7 h3 32.c7 e5 33.c8Q ef4 34.Qe6 Kg5 35.Rg7#) 30.Ra7 (30.Ra7 e5 31.de5 Kg6 32.c6 h4 33.c7 hg3 34.c8Q gh2 35.Kh2 d4 36.Qe6#; 30.Bh5 e5 31.de5 Ke6 32.Bf7#) 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

3.e3 Ba6 4.Bb2 Nf6 5.Nf3 e5 (5...e6!?+=) 6.Ne5+/– Ne5 7.Be5 d6 (7...Bb7 8.Bb5 Bg2 9.Rg1+/–) 8.Bb2 Be7 9.d4 (9.a4 Qd7+–) 9...Ne4 (9...d5 10.Bd3+/–) 10.Nd2 d5 (10...Nd2!? 11.Qd2 d5+/–) 11.Ne4+– de4 12.Qg4 0–0 13.Qe4 Qd6 14.Bd3 Bb7?? (14...f5 15.Qf3 Rab8+–) 15.Qh7# 1–0. Fournier,Frederic (2090) – NN, jeu.europe–echecs.com, 2013.

3.e3 Rb8 4.Bb2 (4.d4 d5+=) 4...Nf6 (4...e5 5.Nf3 d6 6.Nc3+=) 5.c4 (5.Nf3 a5+=) 5...a6 (5...bc4 6.Bc4 e5 7.Qc2=) 6.Nf3 (6.d4 bc4 7.d5 Na7+=) 6...h5 (6...e6!?+=) 7.cb5 (7.d4 e6+–) 7...ab5 8.Nc3 Rg8? (better 8...Ba6!?+–) 9.Nb5 (better 9.Bb5 Na7 10.Bc4+–) 9...Rb5? (better 9...e6+–) 10.Bb5 Nb8 (10...Bb7 11.0–0+–) 11.0–0 h4 (11...e6 12.Ne5+–) 12.Nh4 Nh7 (12...Rh8 13.Nf3+–) 13.f4 (13.Be5 Nf6+–) 13...Nf6 14.Qc2 c6 15.Be2 (15.Bd3 e6+–) 15...Na6 (15...Ba6 16.Ba6 Na6 17.Nf3+–) 16.Ng6 fg6 (16...Bb7+–) 17.Qg6 1–0. GuestBTJT – GuestQYKQ, freechess.org, 2016.

3.Bb2 Bb7

4.e3 e5 5.Bb5 Qf6 (5...Nb4 6.Nf3 (worse 6.ab4 Bg2 7.Nf3 Bh1–/+) 6...e4 7.Ne5+=) 6.Nf3+– 0–0–0? (6...a5!? 7.ba5 Ra5+–) 7.0–0 (7.Bc6 Qc6 8.Be5 Qg6+–) 7...d5 (better 7...d6+–) 8.Bc6 Bc6 9.Ne5 Bb5 10.a4?? (better 10.c4 dc4 11.Qh5 Nh6+–) 10...Bc6?? (10...Bf1 11.Qf1 Ne7+– (11...Bb4? 12.Nd3 Qh4 13.Nb4 Qb4 14.Bg7+–)) 11.b5 (11.Bd4 Qe6 12.Nc6 Qc6+–) 11...Bd7 (11...Be8 12.c4+–) 12.c4 (12.Bd4!? Qe6 13.Nd7 Rd7 14.Ba7 c5+–) 12...dc4 13.Nc4 Qg6 (13...Qf5+–) 14.Qf3 Nf6 (14...c6 15.Ne5 Qf6 16.Qf6 Nf6 17.Nf7 Bb4+–) 15.Qa8 1–0. GuestPXKS – GuestJTKP, freechess.org, 2017.

4.Nf3 Nf6 5.e3 a6 6.c4 e6 (6...bc4!? 7.Bc4 e6+=) 7.cb5+/– ab5 8.Bb5 Ne4 9.Nc3 Nd6 10.0–0 (10.Be2 Be7+/–) 10...Qb8? (10...Nb5 11.Nb5 Ba6 12.a4+=) 11.d4 (better is 11.Be2+–) 11...Nb5= 12.Nb5 d5?? (12...Ba6 13.a4 Nb4= (worse is 13...Bb4 14.d5 Na7 15.Qd3+/–)) 13.Nc3 Bd6 14.Nb5 Ba6 (better is 14...Bf8!?=) 15.Nd6+/– cd6 16.Rc1 (better is 16.Re1+/–) 16...Bf1+= 17.Qf1 Ne7 18.Qd3 h6 19.e4 0–0 20.ed5 Nd5 21.g3 Rc8 22.Rc4 Rc7 23.Rc7 Qc7 24.Nd2? (24.Kg2 Nb6–/+) 24...Nf6 (better is 24...Rc8!? 25.h3–+) 25.Ne4 Nd5 26.Kg2 (26.Nd2 Rc8 27.h3–+) 26...Qc6 27.h4? (27.b5 Qb7 28.Kg1 Qc7–/+) 27...Rc8 (27...f5 28.f3 fe4 29.Qe4–+) 28.b5 Qc7 (28...Qc2 29.Qc2 Rc2 30.Ba1–+) 29.Qb3? (29.a4 f5 30.Nd2 Qc2–+) 29...Nb6 (29...Qc2 30.Qc2 Rc2 31.Ba1–+) 30.Qb4 (30.a4 Nc4–/+) 30...Nc4 (30...Qc2 31.Nd6 Nd5 32.Qe1–+) 31.Bc1 (31.a4 Qb7 32.f3 Qd5–+) 31...d5 (better is 31...Qb6!? 32.Bb2 f5–+) 32.Nc5–/+ Qb6 33.a4 Ne5 (better is 33...e5 34.Be3 Qf6–/+ (34...Ne3?! 35.fe3 Ra8 36.Qb3+=)) 34.de5+= Rc5 35.Be3 Rc4?? (better is 35...d4 36.Qd4 Qb7 37.Kh2 Rd5=) 36.Qc4+– (36.Bb6 Rb4 37.Bc5 Ra4–/+) 36...dc4 37.Bb6 g6 38.a5 c3 39.Be3 1–0. Mr.Oldenslo – xorb, ChessWorld.net, 2011.

2.a3 b6

3.Bb2 b5 (3...Nf6 4.Nf3+=) 4.e3 a6 5.c4 bc4 6.Bc4 Bb7 7.Nf3 d6 (7...e6 8.d4+=) 8.d4 (8.Ng5 Nh6+/–) 8...Qd7 9.0–0 0–0–0? (better is 9...d5!? 10.Bd3 Nf6+/–) 10.Qa4 (10.Bf7 Qf5 11.Bc4 e6+–) 10...e6 11.Ba6 Ba6 (11...Ne5 12.Bb7 Kb7 13.Qd1+–) 12.Qa6 Kb8 13.Nc3 Qc8 (13...Nf6+–) 14.Qc6 Qb7 15.Qb7 (better is 15.Qa4!? c6+–) 15...Kb7 16.a4 d5 17.Ne5 Nf6 (17...Nh6 18.b5+–) 18.Nf7 Rd7 (18...Bb4 19.Rfc1 Ba5+–) 19.Nh8 Bd6 (19...g6 20.a5+–) 20.b5 Kc8 (20...Ng4 21.Ba3 Ba3 22.Ra3+–) 21.Ba3 c5 22.dc5 (better is 22.bc6 Rd8 23.Nf7 Ba3 24.Ra3 Rf8 25.Nd6 Kd8+–) 22...Be5 23.Rfc1 Kd8 24.c6 Rc7 25.f4 Bc3 26.Rc3 Ne4 27.Rcc1 Ke8 28.b6 Rc8 29.c7 (29.b7 Rb8 30.c7 Nc5 31.cb8Q Kd7 32.Bc5 d4 33.Qc8) 29...Ra8 30.c8Q (30.b7 Rd8 31.cd8R Kd8 32.b8Q Kd7 33.Rc7) 30...Rc8 31.Rc8 Kd7 32.b7 (32.Rc7 Kd8 33.Nf7 Ke8 34.b7 Nd6 35.b8Q Nc8 36.Qc8) 32...Nd6 (32...g6 33.b8Q e5 34.Qc7 Ke6 35.Qf7) 33.Bd6 (33.b8Q e5 34.Qd6 Kc8 35.Rb1 ef4 36.Rb8) 33...Kd6 (33...e5 34.b8Q Ke6 35.Re8 Kf5 36.Re5 Kg4 37.Qc8 Kh4 38.g3) 34.b8Q Ke7 35.Qc7 Kf6 36.Qe5 (36.Qf7) 36...Ke7 37.Rac1 h6 (37...d4 38.R1c7) 38.R1c7 1–0. Fournier,Frederic – Chicot,Patricia, Active Game France (FRA), 2006.

3.Bb2 Bb7 (--> 1.b4 b6 2.Bb2 Bb7 3.a3 Nc6).

3.Bb2 e5 4.b5 Nd4 5.e3 Nf5 6.Be5 d6 7.Bb2 Be7 8.e4 Nh4?? 9.Bg7+– Ng6 10.Bh8 f6 11.Qh5 Qd7 12.Qh7 Nf8 13.Qg8 Qc6 14.bc6 Be6 15.Qg3 0–0–0 16.Bg7 Nh7 17.d4 Ng5 18.Qd3 Rh8 19.Qa6 Kd8 20.Qa7 Ke8 21.Bh8 Ne4 22.Qc7 f5 23.Bb5 f4 24.Qb6 Bh4 25.g3 Bf6 26.c7 Kf7 27.Bf6 Kf6 28.d5 Bc8 29.gf4 Kf5 30.Nd2 (30...Kg6 31.Ne4 Bg4 32.Qd6 Kf7 33.Bd7 Bd7 34.Qd7 Kg6 35.f5 Kh6 36.c8Q Kh5 37.h3 Kh4 38.Qh7#) 1–0. undergearmalaysia – dforry, net–chess.com, 2002.

3.Bb2 Nf6 4.Nf3 +=.

3.c3 a5 4.b5 Ne5 5.d4 Nc4 6.e3 Bb7 7.Nf3 (worse is 7.Bc4 Bg2 8.Bd5 Bd5–/+) 7...e6?? (better is 7...Nd6+=) 8.Bc4+– d5 9.Bd3 Bd6 10.0–0 Nf6 11.Re1 Ng4 12.h3 Nf6 13.c4 dc4 14.Bc4 Ne4 15.Qe2 0–0 16.Rd1 Nf6 17.Bd3 c5 18.bc6! Bc6 19.Bb2 Ne4 (19...Rc8 20.Nc3+–) 20.Be4 (better is 20.Qc2 Nf2 21.Qf2+– (21.Qc6?! Nd1 22.Bh7 Kh8+/–)) 20...Be4 21.Nfd2 Qh4 (21...Bb7 22.Nc3+–) 22.f3 (better is 22.g3 Bg3 23.Ne4 (23.fg3?! Qg3 24.Kf1 Bd3 25.Qd3 Qh3 26.Kf2 Qh2 27.Kf3 Qh3 28.Ke2 Qg2 29.Ke1 Qg3 30.Ke2 Qg2 31.Ke1 Qg3 32.Ke2 Qg2=) 23...Qe4 24.fg3+–) 22...Bc6 23.Nc4 Bg3 24.Nb6 Rab8 25.Nc4 Bb5 26.Qc2 (better is 26.Nbd2+–) 26...Bc4= 27.Qc4 Rb2 28.Nc3 (28.Qc3!? Re2 29.Qd3+= (29.Qa5?? Be5 30.Rf1 Qg3 31.Rf2 Qf2 32.Kh1 Qg2#)) 28...Bf2 29.Kf1?? (better is 29.Kh1 Be3 30.Ne4+=) 29...Be3–+ 30.Qe2 Re2 31.Ke2 Qf2 32.Kd3 Rd8 (32...Bd4 33.Nd5 ed5 34.Re1 Ba1 35.Re2 Qd4 36.Kc2 Rc8 37.Kb1 Qd1 38.Ka2 Qe2 39.Ka1 Rc1#) 33.Rf1 (33.Ne4 Rd4 34.Kc3–+) 33...Rd4# 0–1. gordiemac – WirralBoy, ChessWorld.net, 2012.

3.Nf3 e5 =.

3.Nh3 d5 4.Nf4 =.

3.Nh3 h6 4.Nc3 Nf6 5.f3 (5.b5 Na5=) 5...e6 6.Bb2 Ba6?? (better is 6...Be7=) 7.Na4?? (better is 7.b5+–) 7...Bb5 (7...Bb5 8.Nc3 Bc4=). Wissel,Andreas (1800) – Borgwardt,Denny (1800), remoteschach.de, 2003.

2.a3 e5

(--> 1.b4 e5 2.a3 Nc6).

3.Bb2 (--> 1.b4 e5 2.Bb2 Nc6 3.a3??).

3.Bb2 a6 4.e3 d5 (--> 1.b4 d5 2.Bb2 a6 3.e3 Nc6 4.a3 e5).

3.Bb2 Qf6 (--> 1.b4 e5 2.Bb2 Qf6 3.a3 Nc6).

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

3.e3 d5 (--> 1.b4 e5 2.a3 d5 3.e3 Nc6).

3.Bb2 d5

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

4.e3 a6 (--> 1.b4 d5 2.Bb2 a6 3.e3 Nc6 4.a3 e5).

3.Bb2 d6

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

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

2.a3 Ne5

3.Bb2 d5?? 4.Be5+– Nf6 (4...a5 5.b5+–) 5.e3 (5.Nf3 Ng4+–) 5...e6 (5...Nd7 6.Nf3+–) 6.Nc3 (6.Nf3 Bd6+–) 6...Ne4 (6...Nd7 7.Bg3+–) 7.d3 (7.Ne4!? de4 8.d4 a5+–) 7...Nc3 8.Bc3 f6 9.Nf3 (9.d4 Bd6+–) 9...e5 10.e4 (10.d4 e4 11.Nd2 a6+–) 10...d4 11.Bb2 g5 12.b5 Be6 13.Nd2 f5 14.c3 Bc5 15.Nc4 Qf6 16.Qh5 Qf7 17.Qg5 Be7 18.Qh6 fe4 19.Ne5 Qf8 20.Qh5 Bf7 21.Nf7 Qf7 22.Qe5 ed3 23.Qd4 Rd8 24.Qa7 d2 25.Kd1 Bg5 26.f3 c6 27.c4 0–0 28.Kc2 Bf6?? 29.a4 Qd7?? 30.Rd1+– Qf5 31.Kb3 Bb2 32.Kb2 Qe5 33.Kc2 Rfe8 34.Qb7 Qe1 35.Bd3 Re3 36.bc6 Rde8 37.c7 R3e7 38.a5 Qe5 39.a6 Qc7 40.Qd5 Kf8 41.Kd2 Rd7 42.Qf5 Rf7 43.Qb5 Qf4 44.Kc2 Qe5 45.Qe5 Re5 46.f4 Rf4 47.g3 Rf2 48.Rd2 Rf7 49.g4 Ra5 50.h4 Ra6 51.g5 Ra2 52.Kd1 Ra1= 53.Ke2 Rh1=+ 54.Rc2 Rh4–/+ 55.c5 Rg4 56.c6 Re7?? 57.Kf3+/– Rg5 58.Kf4?? Rg1?? 59.Re2?? Rf1–+ 60.Kg3 Rg7 61.Kh2 h5 62.Rg2 Rd1 63.Be2 Rc1 64.Rg7=+ Kg7 65.Bf3? Kh6 66.Kh3 Rf1 67.Bg2 Rc1?? 68.Kg3?? Kg5–+ 69.Kf2 Kg4 70.Bf3–/+ Kg5 71.Ke2?? h4–+ 72.Kd2 Rc5 73.Kd3 Kf4 74.Be4 Ke5 75.Bf3 Kd6 76.Ke2 h3 77.Kf2 Rc4 78.Kg1 Rh4 79.Kh2–/+ Kc7 80.Bh1 ½–½. Gregor123 – Master1, mySchach.de, 2004.

3.Bb2 Ng6 4.e3 (4.e4 e5=) 4...d6 (4...e5 5.d4 e4 6.c4=) 5.Nf3 e5 6.c4 (6.Be2 Nf6=) 6...f5 (6...Nf6 7.Be2=) 7.c5 (7.Be2 e4 8.Nd4 Qg5+=) 7...Be6 (7...e4 8.Ng1=+) 8.h4 (8.cd6 Bd6 9.d4 Qf6=) 8...Be7 (8...dc5 9.h5 N6e7 10.Be5 cb4 11.Nd4+=) 9.cd6+= cd6 10.h5 (10.d4 e4 11.h5 Nf8+= (< 11...ef3 12.hg6 Nh6 13.Qf3+–)) 10...Nh4= 11.Nh4 Bh4 12.h6 Bf6 (12...g6 13.Qa4 Bd7 14.Bb5=) 13.hg7+= Bg7 14.Qh5 (14.d4 Qd7+=) 14...Kd7 15.Bb5 Ke7 16.Nc3 Nf6 17.Qg5 Qf8 18.Ne2 Qf7 19.Rc1+= h6?? 20.Qh4 Rac8 21.Ng3 Rc1=+ 22.Bc1 Rc8 23.Ke2 Bc4?? 24.Bc4+/– Qc4? 25.Qc4+– Rc4 26.Nf5 (26...Kf8 27.Nd6+–) 1–0. SilentPlayer – PineMartin, Caissa.com, 2005.

3.d4 Nc6 =.

3.d4 Ng6 4.Nf3 Nf6 5.h4 e6 6.h5 Ne7 7.e4 (7.h6 d5=) 7...a5 (better 7...Ne4!? 8.Bd3 d5=+) 8.e5+= Nfd5 (8...Ne4 9.ba5 d5 10.h6+=) 9.b5+– a4 10.c4 Nb6 11.Nbd2 d6 12.Ne4 d5 13.Nc5 (13.cd5!? Ned5 14.h6+=) 13...dc4= 14.Ng5?? (14.h6 gh6 15.Bh6 Bh6 16.Rh6 Ra7=) 14...Ned5 (better 14...Nf5 15.Nf3 Nd4 16.Qd4 Qd4 17.Nd4 Bc5–+) 15.h6 g6 16.Qf3 f5 17.ef6 Qf6 18.Qf6 Nf6 19.Nge4 (19.Nge6!? Nfd5 20.Ra2+=) 19...Ne4=+ 20.Ne4 Be7 21.Nd2 Bd7 22.Nc4 Nd5 23.Ne5 0–0–0? (23...Rf8 24.Ra2+=) 24.Nd7 (better 24.Nf7+–) 24...Rd7= 25.Be3 Rf8 26.0–0–0 (26.Bc4!?=) 26...Bd6 (26...Ba3 27.Kc2 Rdf7 28.Ra1–/+) 27.Bc4 (27.Rd3 Ne3 28.fe3 Rf2=+) 27...Ba3–/+ (27...Ne3?! 28.fe3 Re7 29.Rd3=+) 28.Kb1 Bd6 29.Bd5 ed5 30.Kc2 Re7 31.Kd3 Kd7 32.Ra1 Ref7?? (better 32...Ra8–+) 33.Ra4+= Rf2 (better 33...b6+=) 34.Raa1?? (better 34.Bf2 Rf2 35.Ra8+–) 34...Rg2–+ 35.Rhg1 Rg3 36.Raf1 (36.Rg3 Bg3 37.Ra7 b6–+) 36…Re8 0–1. pigeons (2240) – FeegLood (2415), lichess.org, 2017.

3.e4 =.

3.Bb2 Nc4

4.Bc3 d5 =.

4.Bd4 =.

3.Bb2 Ng4

4.Nf3 Nf2? (better is 4...N8f6+=) 5.Kf2+– d6 6.e3 g6?? (6...e5 7.Be2+–) 7.Be2 (7.Bh8 e5+–) 7...Bh6 (7...Nf6+–) 8.Bh8 Nf6 9.Bf6 ef6 10.Rf1 Bg7 11.Kg1 f5 12.c3 Be6 13.d4 Bd5 14.Nbd2 (14.c4!? Be4+–) 14...Qe7 15.c4 (better is 15.Kh1 Qe3 16.Bc4 Bf3 17.Rf3 Qe7+–) 15...Bc4 (15...Qe3 16.Kh1 Be4+–) 16.Bc4 c6 (16...Qe3 17.Kh1 0–0–0 18.Re1+–) 17.Qc2 (17.Qe2 d5 18.Bd3 a5+–) 17...d5 18.Bd3 c5 (18...Bh6 19.Rae1 Be3 20.Kh1+–) 19.dc5 (19.Qc5 Qc5 20.bc5 0–0–0+–) 19...Rc8 (19...Ba1 20.Ra1 Qe3 21.Kh1+–) 20.Rfe1 (20.Rae1 Kf8+–) 20...Qc7 (20...Ba1 21.Ra1 Qe3 22.Kh1+–) 21.Rac1 Qd8 22.Nd4 (22.Qa4 Kf8+–) 22...Rc7 23.Bb5 (23.Qa4 Kf8 24.Qa7 f4+–) 23...Ke7 24.Qb3 Qc8 25.Ba4 Bf8 26.Qd5 Kf6 27.N2f3 (27.Nb5 Re7 28.Qd4 Kg5+–) 27...Re7 28.Bb3 (better is 28.Nc6!? Re4 29.Na7 Qe6 30.Qb7 Bh6+–) 28...Re6 29.Ne6 (29.Ne6 fe6 30.Qd4 Ke7 31.Ne5+–) 1–0. Fournier,Frederic – matteo4, Active, 2008.

4.h3 N4f6 5.e3 h5 (5...d6 6.d4=) 6.d4 h4 (6...d5 7.c4+=) 7.Nd2 Nh5 (7...a6!?+=) 8.Ngf3+– e6 9.Bd3 d5 10.c4 c6 11.Rc1 f5 12.Ne5 Ne7 13.Be2 g6 14.Ng6! Ng6 15.Bh5 Kf7 (15...Qg5 16.Bf3+–) 16.Bg6 Kg6 17.Nf3 Bg7 18.cd5 ed5 19.Ne5 Be5 20.de5 Be6 21.b5 (21.0–0 Rg8+–) 21...cb5 (21...Qa5 22.Qd2 Qb5 23.Qd4+=) 22.Qb3 (22.0–0 Qa5+–) 22...Qa5 23.Bc3 Qa4 24.Qb2 Rac8 25.0–0 Rc4 26.Bb4 Rhc8 27.Rc4 Rc4 28.f3 (28.Rc1!?+–) 28...Qc2= 29.Qa1 Qb3 (29...Qd3 30.Re1=) 30.Qe1+= Kh5 (30...Qb2 31.f4 Rc2 32.Rf2 (32.Qh4?? Rg2 33.Kh1 Rh2 34.Kg1 Qg2) 32...Rf2 33.Qf2 Qf2 34.Kf2+=) 31.g4 (31.f4 Rc2+–) 31...hg3+= 32.Qg3 (32.f4 Rc8 33.Rf3+= (33.Qg3?? Rg8 34.Rf3 Qd1 35.Kf2 d4–+)) 32...Rc2?? (better 32...Qe3 33.Kh1 Qg5 34.Qg5 Kg5 35.f4 Kh5=+) 33.f4+– Qa2 34.Qg5 1–0. TwelveTeen (2495) – littleplotkin (2440), lichess.org, 2016. (=1.a3 Nc6 2.b4)

2.Ba3 e6

3.b5 Nce7 =.

3.c3 Nf6 4.b5 Ba3 5.Na3 Ne7 6.d4 a6 7.Nf3 ab5 8.Nb5 d5 9.e3? (better is 9.Qb3+=) 9...c6–+ 10.Ne5 0–0 11.Bd3 cb5 12.Qb3 Bd7 13.Nd7 Qd7 14.Bb5 Qc7 15.f3 Rfc8 16.Rc1 Nf5 17.Kf2 Nd6 18.Bd3 (18.Bd3 Ra7 19.Rc2–+). Hammi.Bogart – pcmvr, ChessWorld.net, 2003.

3.e3 Bb4 4.Bb4 Nb4 5.Nc3 –/+.

3.e3 Qf6 4.c3 Bd6 (4...Bb4 5.Bb4 Nb4 6.d4+=) 5.Qc2 (5.d4 e5=) 5...Qg6 (5...Bb4!? 6.Nf3 Ba3 7.Na3 Qe7+=) 6.Qd1 Nf6 7.f4 0–0 8.Bc1 Qe4 (8...a6 9.Nf3+=) 9.Kf2 (9.Nf3 Be7=) 9...a5 10.d3 Qd5 11.a3? (better is 11.c4!? Qf5 12.b5+=) 11...ab4–+ 12.a4 (better is 12.Be2–+) 12...Ne4! 13.Ke1 (13.de4 Qd1 Pinning (13...Qd1 Deflection)) 13...Nc3 14.Nc3 bc3 15.Ke2 b5 16.e4 (16.Nf3 b4 17.e4 Qh5–+) 16...Qh5 17.Ke1 Qd1 18.Kd1 Ra4 (better is 18...Nd4–+) 19.Rb1 (19.Ra4 ba4 20.Ne2–+) 19...Nd4 20.Ke1 c2 21.e5 (21.Rb2 Ra1 22.Ne2 Bf4 23.Ra2 Ra2 24.Nf4–+) 21...cb1Q 22.Kf2 Qc1 23.ed6 (23.Be2 Qf4 24.Nf3 Nf3 25.Rc1 Qd4 26.Kg3 Be5 27.Kf3 Qf4) 23...Ra2 (23...Qf4 24.Nf3 Ra2 25.Be2 Re2 26.Kg1 Qe3 27.Kf1 Qf2) 24.Kg3 (24.Be2 Qf4 25.Ke1 Ra1 26.Bd1 Qe3 27.Ne2 Qe2) 24...Qf1 25.Kh4 (25.Ne2 Nf5 26.Kh3 Qe2 27.dc7 Qg2) 25...Qg2 26.dc7 Nf5 27.Kh5 g6 0–1. IBM_Chess – Chess88, 1995.

3.g4 a5 4.h4? ab4–+ 5.Bb2 Bc5?? 6.Bg7+/– Bd4 7.Bh8 Bh8 8.c3 Na5 9.Rh3 b3?? 10.Bg2 b2–+ 11.Be4 ba1Q 12.Bh7 Nf6 13.Bd3 Qa2 14.f4 Ng8 15.h5 Qd5 16.h6 Nh6! 17.Rh6 Qg2 18.Nf3 Qg3 19.Kf1 Bg7 20.Rh7 Qf6 21.Qa4 Qgf4 22.e4 Qf3 23.Ke1 Qd3 24.Rh5 Qff1# 0–1. lhaughey – smyers, net–chess.com, 2003.

3.g4 Bb4 4.Bb4 Nb4 5.Nc3 –/+.

2.Bb2? Nb4

3.a3 Nd5 4.c4 (4.e4 Nb6+=) 4...Ndf6 5.e3 (5.Nf3 d6+=) 5...b6 (5...c6 6.Nf3+=) 6.Nf3+= Ba6 (6...Bb7 7.d4+=) 7.d4= Bc4?? (better is 7...Bb7=) 8.Bc4+– b5 (8...e6 9.0–0+–) 9.Bb3 (9.Bb5!? Rb8 10.Qe2 c6+–) 9...c6 10.Ng5 (better is 10.0–0+–) 10...Qa5?? (10...e6 11.0–0+–) 11.Nd2 (11.Bc3 b4 12.Nf7 bc3+–) 11...h6?? (better is 11...Nh6+–) 12.Nf7 (worse is 12.Bf7 Kd8 13.Ngf3 e6+–) 12...Qa4 (12...Rh7 13.Ne5 g6+–) 13.Ba4 (13.Ba4 Kf7 14.Bc2+–; better is 13.Nh8 Qa5 14.Bg8 Ng8 15.Qh5 Kd8+–) 1–0. saetta – astrot, ICS, 1999.

3.Ba3 e5 4.c3 Nc6 5.Bf8 Kf8 6.d4 –/+.

3.Ba3 e6 4.g3 (4.c3 Nc6+=) 4...Nf6 5.Bh3 (better is 5.d4–/+) 5...Qe7?? (5...c5 6.Nf3–+) 6.Qc1?? (better is 6.c3 a5 7.cb4 ab4 8.Bb2+/–) 6...Ne4 (better is 6...Qc5 7.c3 Qd5–+) 7.Qb2? (7.Nf3 Qf6 8.Bb2 Qh6–/+) 7...c5 (7...Qc5 8.Bb4 Qf2 9.Kd1 Qb6–/+) 8.Qb3?? (8.d3 Nf6–/+) 8...Qg5 (8...Qf6 9.Bb2 c4 10.Bf6 cb3 11.Na3 Nf6 12.ab3–+) 9.Qf3?? (better is 9.c3 c4 10.Qb2–/+) 9...Nc2 (9...Qe5 10.Nc3 Nc3 11.Bb2 Nc2 12.Kf1–+) 10.Kd1 Na1 11.Bb2 (11.Qe4 d5 12.Qf4–+) 11...Qf6 (better is 11...Qd5 12.Ba1 Nf2 13.Qf2 Qa2–+) 12.Bf6+/– gf6?? (better is 12...Nf6 13.Bg2 Nd5+/–) 13.Qe4+– f5 (13...d5 14.Qf3 Bg7 15.Qc3+–) 14.Qa4 (better is 14.Qe5 Rg8 15.Qa1 Bg7+–) 14...Bg7 15.Qa3 b6 16.Qb2 (better is 16.Nc3 Bb7 17.f3+–) 16...Bb2–+ 17.Bg2 Ba6 (better is 17...d5–+) 18.Ba8 Bb5 (18...Bc4 19.Nc3–+) 19.Bb7 (19.Nc3 Bc4–+) 19...Ba4 20.Ke1 Bb5 (20...Nc2!? 21.Kf1 Nb4 22.a3–+) 21.Nf3?? (21.Kd1 Bc4 22.Nc3–+) 21...Nc2 22.Kf1 (22.Kd1 Nb4 23.Nc3 Bc4–+) 22...Nd4 (better is 22...Ke7 23.Nc3 Bc3 24.dc3–+) 23.Nh4 (23.Nd4 cd4 24.Bf3–+) 23...Be2 24.Ke1 Bg4 (24...Bd3 25.Nc3–+) 25.a3 (25.Nc3–+) 25...Ba3 (better is 25...Nc2 26.Kf1 Na3 27.Na3 Ba3–+) 26.Na3 h6 27.h3 Be2 (27...Be2 28.Nc2 Nc2 29.Ke2 Ke7–+) 0–1. Zichym – Skorpio23, internet, 2008.

3.c3 Nd5 4.Na3 c6 (4...Ndf6 5.Nf3–/+) 5.Rc1 (5.Nf3 d6–/+) 5...e5 6.c4 Ba3 (6...Ndf6!?–/+) 7.Ba3=+ Nb6 (7...Ndf6=+) 8.Rc3 (better is 8.Bd6!?=) 8...d5 9.cd5 Qd5 10.Qb3 Qb3 11.Rb3 (11.ab3 Nf6–/+) 11...Be6–+ 12.Rb6? (better is 12.Rg3–+) 12...ab6 13.Bd6 (13.Bb2 Ra2 14.Be5 f6–+) 13...Ra2 (14.Be5 f6–+) 0–1. texasisbest – wgauthier, net–chess.com, 2001.

3.e4 d5 4.a3+= Nc6 5.e5 (5.ed5 Qd5 6.Nc3 Qe6 7.Qe2 Qe2 8.Be2 Nd4=) 5...Bf5 6.Nf3 e6 7.Bb5 Nge7 8.0–0 (8.Nd4 Rb8–/+) 8...a6 9.Be2 (9.Ba4 b5 10.Bb3 Na5–/+) 9...Ng6 10.d4 Be7 (10...Nf4 11.Nc3–/+) 11.Nbd2 (11.Nfd2 h5–/+) 11...0–0 12.g3 (12.Ne1 Bg5–/+) 12...Bh3 (12...f6 13.ef6 Bf6 14.Nb3–+) 13.Re1–/+ Na7 (13...Bg4 14.Rb1–/+) 14.Nf1 (14.Bc3 Nb5 15.Bb2 c5–/+) 14...c5 15.Ne3 cd4 16.Bd4 Nc6 17.c3 Qc7 18.Bf1 (18.Kh1 Nge5 (18...Nce5?! 19.Ng1+=) 19.Ng1 Bf5 (19...Nd4?! 20.cd4 Nc4 21.Nh3=) 20.Nf5 ef5 21.Be5 Ne5–/+) 18...Bf1 19.Nf1 Rac8 (19...Rfc8 20.Qd3–+) 20.h4 Bd8 (20...h6 21.h5 Nh8 22.Ne3–+) 21.h5–/+ Nge7 22.g4 (22.h6 gh6 23.Rb1 Nf5–/+) 22...Nd4 23.cd4 Qc2 (23...Nc6 24.h6–+) 24.Ne3 (24.Qc2 Rc2 25.Rec1 Rc1 26.Rc1 Nc6–/+) 24...Qd1 (24...Qc3 25.h6–/+) 25.Red1 Ba5 26.Rab1 (26.g5 b5–/+) 26...b5 27.g5 (27.Rdc1 Rc3 28.Rc3 Bc3–/+) 27...Rc3 28.Ra1 Rfc8 29.Ne1 (29.h6 gh6 30.gh6 Kh8–+) 29...Bd8 30.Kf1 Nc6 31.Nf3 Na5 32.Ke2 (32.a4 Nb3 33.Ra2 Nc1–+) 32...Nb3 33.Rab1 Be7 (33...Be7 34.h6 Ba3 35.hg7 Nc1 36.Kd2 b4–+) 0–1. Wong,Raymond – Larsson,S, corr 3GMM–22, 1996.

3.e4 e5 4.Nc3 –/+.

3.Nf3 Nc6 4.e4 d6 5.Bc4 e5 6.0–0 Nf6 7.d3 (7.Ng5 d5 8.ed5 Nd5 9.Nf7 Kf7 10.Qf3 Ke6 11.Nc3+–) 7...Be7–/+ 8.Ng5 0–0 9.f4 h6 10.Nh3 ef4 (10...d5 11.fe5 Bg4–/+ (worse 11...dc4 12.ef6 Bf6 13.Bf6 gf6 14.Nf2=+)) 11.Nf4–/+ Ne5 12.Bb3 Ng6?? (12...c5 13.Nc3–/+) 13.Ne2 (better 13.Ng6 Re8 14.Qc1+–) 13...Bg4 14.Nd2 Be2 (14...d5!? 15.h3 Be6–/+) 15.Qe2= Ne5 16.d4 Ng6 17.Nf3 Re8 (17...Qd7 18.Rae1=+) 18.c3 (18.e5!? Nf4 19.Qe3 de5 20.Bf7 Kf7 21.Ne5 Kg8 22.Rf4+=) 18...Qd7 19.Qd3 Qg4 20.Rae1? (20.Nd2 c6=+) 20...Nf4?? (better 20...Qg2! 21.Kg2 Nf4 22.Kg1 Nd3–+) 21.Qd2 Nh7 22.e5 Nh3 23.Kh1 N3g5 24.Qe2 Nf3 25.Rf3 Ng5? (better 25...Bf6 26.Qb5 de5 27.de5 Ng5+=) 26.Rg3?? (better 26.Rf7! Qe2 27.Rf2 (27.Re2?? Nf7 28.e6 Nh8–+) 27...Kh8 28.Rfe2+–) 26...Qe2–/+ 27.Re2 Kh7 (27...de5!? 28.de5 a5–/+) 28.h4 (28.Rge3 Rf8+=) 28...Ne6= 29.Re4 (better 29.ed6!? Bd6 30.Rge3=) 29...de5–/+ 30.d5? (better 30.Rf3 Kg8 31.Re5 Bh4 32.Rfe3–/+) 30...Nc5–+ 31.Reg4 g6 32.Bc2 (32.h5 e4 33.Bc2 g5–+) 32...e4! 33.Re3 (33.Be4 f5 Double attack (33...f5 Decoy)) 33...b6 (33...f5 34.Rf4–+) 34.a3 (34.h5 Bg5 35.hg6 Kg6 36.Ree4 Re4 37.Re4 Ne4 38.Be4 f5–+) 34...h5 (34...f5 35.Rf4–+) 35.Rf4 Bd6 (better 35...f5 36.c4 c6 37.dc6 Rac8–+) 36.Rf7 Kh6 (36...Kg8 37.Rf6 Rf8 38.Rf8 Rf8 39.Kg1–+) 37.Rf6?? (better 37.Ref3! Be5 38.Bc1 g5 39.R7f5+– (39.Bg5?! Kg6=; worse 39.hg5 Kg6=+)) 37...Rf8 (37...Nd3 38.Bd3 ed3 39.Bc1 Re3 40.Be3 Kh7 41.Rf7 Kg8 42.Rf3–+) 38.Rf8 (better 38.c4!?–/+) 38...Rf8–+ 39.Re2 (39.Re2 Rf1). alessandrocarvalhaes (1845) – Bonnie_Charles (1840), lichess.org, 2020.

3.Nf3 d5 4.e3 Bg4 5.Bb5 (5.Be2 e6=+) 5...c6–/+ 6.Be2 c5 (6...Qb6 7.Bc3–/+) 7.0–0=+ Nf6 8.c4 (8.Bb5 Nc6=+) 8...Qb6 (8...e6 9.h3 Bf3 10.Bf3=+) 9.a3 Nc6 (9...Na6!? 10.Qa4 Bd7=+) 10.Bf6+= ef6 11.cd5 Bf3 (11...Ne5 12.Nc3 Bd7 13.Rb1+=) 12.Bf3 Ne5 13.Qa4 Nd7 (13...Kd8 14.Be4+=) 14.Nc3 Be7 (15.Rfb1 Qc7+/–; 14...Bd6!?+/–). pcmvr (2225) – bogdans (2065), net–chess.com, 2006.

3.Nf3 d6 =+.

3.Bg7?? Nc2! 4.Qc2 Bg7 5.g3?? (better 5.Nc3–/+) 5...Bb2 (better 5...Ba1 6.Nc3 Nf6–+) 6.Qh7?? (better 6.Qb2 Nf6 7.Bg2+–) 6...e6 (better 6...Rh7 7.Nc3 Ba1 8.Nf3–+) 7.Qf7 (7.Qh8 Bh8 8.Nc3–+) 7...Kf7 8.Bh3 Ke7 9.Be6 Kd6 (better 9...de6 10.Nf3–+) 10.Nc3 Ke6 (better 10...Ba1 11.Bb3 Bc3 12.dc3 Qf6–+) 11.d3 Ke7 (11...Bc3 12.Kf1 Ba1 13.Kg2–+) 12.g4 d5 (12...Bc3 13.Kd1 Ba1 14.f3–+) 13.g5 Qd6 (better 13...Bc3 14.Kd1 Ba1 15.Nf3–+) 14.g6 Qf6 (better 14...Bc3 15.Kd1 Ba1 16.Nf3–+) 15.g7 (15.Nd5 Ke6 16.Nf6 Ba1 17.Ne4–+) 15...Qg6 (better 15...Bc3 16.Kf1 Qg7 17.Rc1–+) 16.gh8N?? (16.gh8Q Ba1 17.Nd5 Kf7 18.Qa1=+) 16...Qg7 (better 16...Qg2 17.Nd5 Qd5 18.Ng6 Kf6 19.Nf3 Qa5 20.Kd1 Ba1 21.Rg1 Qa4 22.Kc1 Qa3 23.Kd2–+) 17.h3 (17.Nd5 Kd6 18.Rb1 Kd5 19.e4 Kc6–+) 17...Qh8 (17...Bc3 18.Kf1 Ba1 19.h4–+) 18.Nf3 (18.Nd5 Kd6 19.Rd1 Kd5 20.e4 Kd6 21.Ne2–+) 18...Qh3 (better 18...Bc3 19.Kd1 Ba1 20.Nd2–+) 19.Rg1 (19.Nd5 Kd6 20.Rh3 Ba1 21.Rh5–+) 19...Qg2 (19...Bc3 20.Kd1 Ba1 21.Rg8 Qf1 22.Kd2 d4 23.Rg7 Kd6 24.Rg6 Be6 25.Nd4 Bd4 26.f4 Qf4 27.Kd1 Bc3 28.e3 Qf2 29.Re6 Ke6 30.Kc1 Qd2 31.Kb1 Qb2) 20.Rg2?? (20.Nd5 Kd6 21.Rg2 Ba1 (worse 21...Kd5 22.Rb1 Bc3 23.Kd1+=) 22.Nc7 Kc7 23.Rg8 Rb8–/+) 20...Nf6 (better 20...Bc3 21.Kd1 Ba1 22.Rg8 c5–+) 21.Rg7 (better 21.Nd5 Nd5 22.Rb1 Bc3 23.Nd2–/+) 21...Ke6?? (better 21...Kf8 22.Rc7 Ba1–+) 22.Ne5?? (better 22.Nd4 Ke5 23.Ncb5+–) 22...Ke5 (better 22...Bc3 23.Kd1 Ba1 24.Nf3–+) 23.Nd5 Ne4 (better 23...Nd5 24.Rb1 Bc3 25.Kf1 Bh3 26.Kg1 Kf6–+) 24.Rg5?? (better 24.Rb1 Bc3 25.Nc3 Nc3 26.Rb3 Na2 27.Rc7+=) 24…Kd4 (24...Kd4 25.de4 Ba1 26.Nc7 Rb8 27.Nb5 Kc4 28.Nd6 Kb4+–; better 24...Ng5 25.Rb1 Kd5 26.Rb2 Ne6–+) 0–1. sirgeshdb – Bird41, lichess.org, 2020.

3.h4 a5 4.Ba3 (4.Nf3 Nf6–/+) 4...g6 (4...d6 5.e4–/+) 5.c3 (5.Bb2 Nf6–/+) 5...Nd5 (5...Nc6 6.Nf3–/+) 6.Bb2 (6.e4 Ndf6 7.e5 Nh5=+) 6...a4 (6...Bg7 7.e4 Nb6 8.Nf3–/+) 7.c4 (better is 7.e4 Ndf6 8.e5=+) 7...Nb4?? (better is 7...Ndf6–/+) 8.Bh8+– Ra5 9.Na3 Nf6 10.Rh3 d5 11.Rb1 Na2 12.Rb5 Rb5 13.Nb5 Bh3 14.Qa4 Bh6? 15.Nc7 Kf8 16.Nd5 Be6 17.Qa2 Nd5 18.e4?? Nf4?? 19.Bd4?? Nd3 20.Bd3= Qd4 21.Qa8?? Kg7–+ 22.Qb7 Kf6 23.Nf3 Qd3?? 24.e5 (24...Kg7 25.Kd1 Qf1 26.Ne1 Qf2 27.Qb4 Bg4 28.Kc2 Qe1 29.h5 Qe4 30.Kb3 Bd1 31.Ka3 Qa8 32.Kb2 Qg2 33.Kc1 Bh5 34.c5–+; 24.Qb2 Qc3 25.Qc3) 1–0. mooney (1785) – preynolds, net–chess.com, 2006.

3.h4 d6 4.Nf3 –/+.

3.a3 Nc6

4.d4 d5–/+ 5.Nd2 Nf6 6.Ngf3 e6 (6...Bf5 7.e3–/+) 7.Ne5 Ne5 8.de5 Nd7 9.e3 g6 (9...Be7 10.Bd3–/+) 10.Bd3 Bg7 11.Nf3 0–0 12.0–0 c5 13.c4 Nb6 14.Qc2 Nc4 15.Bc4 dc4 16.Qc4 b6 17.Qe4 (17.Rfd1 Qe8=+) 17...Ba6 18.Rfd1 Qc7 19.Rab1 (19.Rd6 Rfd8–/+) 19...Rac8 20.a4 (20.Qa4 Bb7–/+) 20...Rfd8 21.Ng5 (21.Qc2 Bb7 22.e4 Qc6–/+) 21...Rd1 22.Rd1 Rd8 23.Rd8 Qd8 24.f4? (24.h4 h6 25.Nh3–+) 24...Qd1 (24...h6 25.Nf3 Qd1 26.Kf2 Qe2 27.Kg3 Qb2 28.Qa8 Bf8 29.h4–+) 25.Kf2 Qe2 26.Kg3 Qb2 (better 26...h6 27.Qa8 Bf8–+) 27.Qa8 Bf8 28.Qa7 (28.Qe8 Qg2 29.Kg2 Bb7 30.Kf2 b5 31.Qf7 Kh8 32.Qf8) 28...Bd3 (28...Qa2 29.Qf7 Kh8 30.Qf8) 29.Qf7 Kh8 30.Qf8 (30.Qh7?!=) 1–0. alt20 – carljk, lichess.org, 2015.

4.e3 e5 5.Nf3 d6 6.Bb5 Bg4 (6...Nf6 7.Nc3–/+) 7.h3 Bh5 8.g4 (8.d4 a6 9.Bc6 bc6 10.de5 f6 11.ed6 Bd6=) 8...Bg6=+ 9.Nh4?? (9.Nc3 a6 10.Ba4 Nf6=+) 9...Be4 (9...Qh4 10.Qf3 Nge7 11.Nc3–+) 10.f3?? (better 10.Nf3=+) 10...Qh4–+ 11.Ke2 (11.Kf1 Bg6–+) 11...Bg6 12.Bc6 (12.Qe1 Qh6–+) 12...bc6 13.Nc3 Qg3 (13...Nf6 14.e4–+) 14.e4 Ne7 (better 14...Qg2 15.Kd3 Rb8 16.Rb1–+) 15.a4 (15.Qg1 Qg1 16.Rhg1 f6–+) 15...d5 (better 15...Qg2 16.Kd3 d5–+) 16.d3 (16.Qg1 Qg1 17.Rhg1 d4–+) 16...d4 (better 16...Qg2 17.Ke1 Qh1 18.Kd2 Qg2 19.Qe2 Qh3 20.Nd1–+) 17.Na2 (17.Qg1 Qg1 18.Rag1 dc3 19.Bc3–+) 17...Qg2 18.Ke1 Qh1 19.Kd2 Qg2 20.Qe2 Qh3 21.Nb4 h5 (21...a5 22.Na2 Rb8 23.Ba3–+) 22.Na6 0–0–0 23.Ba3 hg4 24.fg4 Qg3 (better 24...Qh6 25.Kd1 Qh1 26.Qe1 Qe1 27.Ke1 Rh1 28.Kd2 Ra1 29.Bb2–+) 25.Kc1 Rh1 26.Kb2 Ra1 27.Ka1 Qg1 (better 27...Nd5 28.ed5 Ba3 29.Qf1 Rd5 30.Ka2–+) 28.Ka2 Qe3 29.Qd1 Qf2 (better 29...Be4 30.Ka1–+) 30.Qb1 Kd7 31.Nb8 Rb8! 32.Qb8 Qc2 33.Bb2 Qa4 (33...Nd5 34.Ka1 Nb4 35.Qb4 Bb4 36.a5 Qd3 37.g5 Qe4 38.Ka2 Qd5 39.Ka1 Qa5 40.Ba3 Qa3) 34.Ba3 Nd5 35.Qf8 Nc3 36.Kb2 Qd1 (36...Qb5 37.Qb4 Qd3 38.Qe7 Kc8 39.Qf8 Kb7 40.Qb4 Ka6 41.Qc3 dc3 42.Kb3 c2 43.Ka2 Qc4 44.Ka1 Qb3 45.Bb2 Qa4 46.Ba3 Qa3) 37.Qe7 Kc8 38.Qf8 Kb7 39.Qb4 Ka8 (better 39...Nb5 40.Qb3 Qb3 41.Kb3 Na3–+) 40.Qf8= Kb7 41.Qb4 Ka6 (41...Nb5 42.Qc4 Qb1 43.Kb1 Na3 44.Kc1 Nc4 45.g5–+) 42.Qc4 Kb6 (better 42...Nb5 43.Bf8 Kb7 44.Bg7 Qg4 45.Be5–+) 43.Bc5?? (better 43.Qc5 Kb7 44.Qb4=) 43...Kb7–+ 44.Qb4 (44.Qb3 Qb3 45.Kb3–+) 44...Kc8 45.Ba7 Qb1 46.Ka3 Qa2 0–1. invictus31 – evabogs, lichess.org, 2020.

4.e3 e6 5.Nf3 Nf6 6.Be2 Be7 7.0–0 0–0 8.d4 d5 9.c4 Ne4 10.Nbd2 f5 11.cd5 (11.Qc2 a6=+) 11...ed5–/+ (11...Qd5?! 12.Bc4 Qa5 13.Ne4 fe4 14.Nd2=) 12.Rc1 Be6 13.Nb3 Bd6 (13...f4 14.ef4 Rf4 15.Ne5–/+) 14.Nc5 Bc8 15.Qb3 Kh8 16.Rfd1 (16.Qd5?? Bh2 17.Nh2 Qd5–+) 16...b6 17.Ne4 fe4 18.Rc6 ef3 19.Bf3 Bb7 (19...Rf3 20.Rd6 Qd6 21.gf3–+) 20.Rcc1 (20.Qd5 Qh4 21.h3 Rf3 22.Qf3 Rf8 23.Qf8 Bf8 24.Rc7 Qe4 25.Rb7 Qb7–+) 20...Rf3 (20...Qg5 21.Be2 Bh2 22.Kf1 Rae8–+) 21.gf3=+ Qg5 22.Kf1 Qh5 (22...Ba6 23.Rd3–+) 23.f4 (23.Ke1 Qh2 24.Qb5 a5–/+) 23...Qh2 (23...Ba6 24.Rd3–+) 24.Ke2 (24.Qa4 a5 25.Ke1 g5 26.fg5 Ba6–+) 24...Qh5 (better 24...Ba6!? 25.Rd3 Re8–+) 25.Kd2=+ Ba6 26.Kc2 (26.Rc2 Bc4 27.Rc4 dc4 28.Qc4 Rd8=) 26...Qg6 27.Kd2 (27.Kc3 Bc4 28.Qc2 Qc2 29.Kc2 b5=+) 27...Qh5 (27...Qg2 28.Kc2 Qf2 29.Kb1–+) 28.Re1 (28.Kc2 Bc4 29.Qa4 b5–+) 28...Re8 (28...Qf3!? 29.Rc2 Qf2 30.Kd1 Qf3 31.Kd2 Rf8–+) 29.Qd1 Qg6 Threatening mate: Qd3 30.Kc3 (30.Qc2 Qg2 31.Qa4 Qf2 32.Kd1 c6 33.Qa6 Qb2=+) 30...c5 (30...Bf4 31.Rg1 Qc6 32.Kd2 Qb5–/+) 31.Kb3? (better 31.dc5 Qe4 32.Qd4 bc5 33.Qe4 de4 34.Rcd1=) 31...Bc4–+ 32.Rc4 dc4 33.Ka2 cd4 34.Qd4 Qf7 (better 34...b5–/+) 35.Ka1? (better 35.Qd6!? c3 36.Ka1 cb2 37.Kb2=+) 35...Bc5 (35...Bf4!? 36.Qd2 Qe7 37.Kb1–+) 36.Qc3 Be7 37.Rg1 (37.e4!?–/+) 37...Bf6–+ 38.Qc2 Bb2 39.Qb2 Qf6 40.Qf6 gf6 41.Kb2 Rc8 42.Kc3 b5 43.a4 a6 44.ab5 ab5 45.Rb1 Rb8 46.Kb4 Kg7 47.Rd1 Kf7 48.Rd7 Kg6 49.e4 h6 50.f3 Kh5 (50...h5 51.Rd6 Rc8 52.Kc3 b4 53.Kb4–+) 51.Rd6 (better 51.e5–/+) 51...Kg6?? (better 51...Rc8–+) 52.e5 Kh5 53.e6 (better 53.Rf6!? Rc8 54.e6= (54.Kb5?? c3 55.Rf5 Kh4–+)) 53...Kg6–/+ 54.e7 (better 54.Rd5 f5 55.e7–/+) 54...Kf7?? (better 54...Re8 55.Kb5 Re7 56.Kc4 Kf5–+) 55.Rd8+– Ke7 56.Rb8 Kf7 57.Rh8 (better 57.f5 c3+–) 57...Kg6 58.Rb8 (58.Kc3 h5+–) 58...Kf5?? (58...Kf7 59.f5 Ke7+–) 59.Rb5 Kf4 60.Rc5 (60.Rh5!? f5 61.Kc4 Kf3 62.Rh6 Ke3+–) 60...Kf3 61.Rc4 (61.Rh5 f5 62.Kc4 Ke4+–) 61...f5 62.Rc6 (62.Rh4 Ke3 63.Rh6 Kd4+–) 62...f4?! (62...h5 63.Rh6 Kg4+–) 63.Rh6 Ke2 64.Rf6 (better 64.Re6 Kd3 65.Rf6+–) 64...f3= 65.Rf3 Kf3 ½–½. BeepBeepImAJeep (2625) – bluo (2335), lichess.org, 2017.

4.e4 e5–/+ 5.d3 (5.Nf3 d6+=) 5...d6 (5...Bc5 6.Nf3–/+) 6.Nf3 Nf6 7.Be2 Be7 8.Nbd2 0–0 9.0–0 Bg4 (9...Re8 10.Re1–/+) 10.Ng5 (10.Rb1 Re8–/+) 10...Be2 11.Qe2 h6 (11...Re8 12.c4–/+) 12.Nh3 (12.Ngf3 Nh5–/+) 12...a6 (12...d5–/+) 13.Nf3 (13.f4 Nd4 14.Qd1 c6+=) 13...Ng4 (13...g5 14.Qe3 g4 15.Nh4–/+) 14.Nh4? (better is 14.d4!?+=) 14...Nh2!–+ (14...Bh4?! 15.Qg4 Bf6 16.c4+=) 15.Kh2 Bh4 16.Qg4 (16.Qh5 Bf6–+) 16...Bg5 (16...Bf6 17.Bc1–+) 17.Ng5 (17.Rab1 Rb8–/+) 17...Qg5 18.Qg5 hg5 19.Rh1 (19.Kg3 Kh7–+) 19...f6 20.Kg1 (20.Kg3 Kf7–+) 20...Kf7 21.g3 (21.Kf1 Rh8 22.Ke2 Rh4–+) 21...Rh8 22.Kg2 Ne7 (22...g4 23.Rab1–+) 23.d4 (23.Kf3 b5–+) 23...Ng6 (23...ed4 24.Bd4 Nc6 25.c3–+) 24.de5 (24.Kf3 ed4 25.Bd4 Rae8 26.Rh8 Rh8–+) 24...de5 25.f4? (better is 25.Kf3–+) 25...gf4 26.gf4 (26.Raf1 Ke6–+) 26...Nf4 27.Kf3 Rh3 (27...Ke6 28.Rag1 g5 29.Kg4–+) 28.Kg4 (28.Rh3 Nh3 29.Bc1 Rh8–+) 28...Rah8 (28...Re3 29.Rad1 Ke6 30.Rhe1–+) 29.Rh3 Rh3 30.Rf1 (30.Rd1 Ke6 31.Bc1 g5–+) 30...Re3 31.Bc1 (31.Rd1 Ke6–+) 31...Re4 32.Bf4 (32.Kg3 g5–+) 32...ef4 (32...Rf4 33.Rf4 ef4 34.Kf4–+) 33.Rf4 (33.Rb1 b5 34.Kf3–+) 33...Rf4 34.Kf4 Ke6 35.c4 Kd6 36.a4 (36.Ke4–+) 36...Kc5 37.Kf5 Kc4 38.Kg6 Kb4 39.Kg7 Ka4 40.Kf6 b5 41.Ke5 b4 42.Kd5 b3 (better is 42...Kb5!? 43.Kd4–+) 43.Kc6 b2 44.Kc7 b1Q (44...b1Q 45.Kd7 Qd3 46.Ke6 Kb3–+) 0–1. Nautiluschess – gndo, ICS blitz, 2001.

4.Nf3 d6 +=.

4.Nf3 e6 5.Nc3 d5 6.e4 Bc5 (better is 6...Nf6!? 7.e5 Nd7=+) 7.ed5+= ed5 8.Bb5 (8.Nd5 Qd5 9.Bg7=) 8...Bd7 (better is 8...Nge7!?–/+) 9.Bc6 (better is 9.Nd5!? Kf8 10.0–0+/–) 9...Bc6= 10.0–0 (10.Nd5 f6 11.Qe2 Ne7 12.Ne3=) 10...Qd7 (10...Ne7 11.Ne5 0–0 12.Qf3=+) 11.Re1 (better is 11.Nd5!? f6 12.Re1 Ne7 13.Ne7 Be7 14.Nd4+/–) 11...Ne7–/+ 12.Ne5 Qd6 (12...Qf5 13.d4 Bd6 14.a4=+) 13.Ne2 (13.d4 Bb6=) 13...f6 (better is 13...0–0=+) 14.Ng4? (14.Nc6 Qc6 (< 14...Nc6 15.Nf4 Kf7 16.Qh5 g6 17.Qd5 Qd5 18.Nd5=) 15.Bd4 Bd6=+) 14...0–0–0 (14...d4 15.Ng3–+) 15.h3 (better is 15.d4!? Bb6 16.a4=+) 15...h5–+ 16.Ne3 (better is 16.Nh2–+) 16...g5 (better is 16...d4 17.Nf1 Qd5–+) 17.a4?? (17.d4 Bb6=+) 17...g4 (17...d4 18.Nd4 Bd4 19.Ba3–+) 18.h4?? (better is 18.d4 Bb4 19.c3=+) 18...f5 (better is 18...d4–+) 19.d4 (better is 19.Bh8 Rh8 20.d4=) 19...Bb6?? (19...Qf6 20.dc5 Qb2–/+) 20.c4?? (better is 20.a5 f4 21.Ba3+– (21.ab6?! fe3 22.ba7 ef2 23.Kf2 Kd7+/–)) 20...f4 (20...Ba5 21.Ba3 Qf6 22.Be7 Qe7 23.cd5–/+) 21.c5 (better is 21.Ba3 Qf6 22.Be7 Qe7 23.Nf4 dc4 24.Ned5=+) 21...Bc5?? (better is 21...Qf6 22.cb6 fe3 23.fe3 ab6–/+) 22.dc5+– Qc5 (22...Qh6 23.Bh8 Rh8 24.Nc2+–) 23.Bd4 (23.Nf4 d4 24.Ne6 Qe5 25.Nd8 Rd8+–) 23...Qd6 24.Nc2?? (24.Bh8!? fe3 25.Bd4 Nf5+–) 24...f3? (better is 24...Rhe8+/–) 25.g3?? (better is 25.Bh8 Rh8 26.Ned4+–) 25...fe2–+ 26.Re2 Nf5 (better is 26...Rhf8–/+) 27.Bh8+= Rh8 28.Qd3 (better is 28.Nd4 Bd7 29.Nf5 Bf5 30.Qd4=) 28...Qc5?? (better is 28...Rf8=+) 29.Qf5+– Bd7 30.Qf6 Rd8 31.Rc1 Kb8 (31...d4 32.Re5 Qc6+–) 32.Nd4 (32.Qd8 Bc8 33.Re8 a5 34.Qc8 Ka7 35.Rb1 Qb5 36.Rb5 c5 37.Qb7) 32...Qc1–+ 33.Kg2 Ka8?? (33...Kc8 34.Nf5 b6 35.Ne7 Kb7 36.Nd5–+) 34.Nb5 (34.Qd8 Bc8 35.Qc8) 34...Rb8 35.Qe5 c6?? (better is 35...Bb5 36.ab5 Qc4–+) 36.Nc7# 1–0. painter1 – hercules53, Live Game Caissa's Web, 2004.

4.g3 f6 5.Bg2 e5 6.d3 d5 7.Nd2 Bd7 (7...Be7 8.Ngf3–/+) 8.Ngf3 (8.Bd5 Bd6=) 8...Bc5 9.0–0 Nge7 10.Nb3 Bb6 11.a4 a6 12.a5 Ba7 13.Ba3 0–0 14.Nfd2 Nf5?? (better 14...Be6–/+) 15.Bf8+– Qf8 (15...Kf8 16.Bd5 Nfe7 17.Bg2+–) 16.Bd5+– Kh8 17.Bg2 Re8 18.e4 (18.e3 Be3 19.fe3 Ne3+–) 18...Nfd4 19.Nd4 (19.Rb1 Be6+–) 19...Nd4 (19...Bd4 20.Rc1+=) 20.Nb3 (20.Rb1 Rb8+–) 20...f5 (20...Nb3!? 21.cb3 Be6+=) 21.Nd4 Bd4 22.Ra2 (22.Rc1 Bc3+–) 22...fe4 (22...Be6 23.Ra4 f4 24.Qh5 fg3 25.hg3+=) 23.Be4 Qf7 24.Ra3 Rf8 25.Qe2 (25.Bb7?! Bh3 26.c3 Bf2 27.Kh1 Bf1 28.Qf1 Qe7=+) 25...Bh3 26.Bg2 Bg2 27.Kg2 b6 (27...Qd5!? 28.f3 Kg8+–) 28.ab6+– cb6 29.Ra6?? (better 29.Qe4 a5 30.f4+–) 29...Qb7–+ 30.Kg1 (30.Qe4 Qa6 31.f4 Qa2 32.fe5 Qc2 33.Kh3 Qc8 34.Kg2 Rf1 35.Kf1 Qh3 36.Ke1 Bc3 37.Ke2 Qh2 38.Kf1 Qh3 39.Kf2 Qe6–+) 30...Qa6 31.Rc1 (31.Kg2–+) 31…Rf2 (31...Rf2 32.Qf2 Bf2 33.Kf2 Qc8–+) 0–1. JUANKARODA (1780) – mhalawa (1755), lichess.org, 2020.

3.e3 Nc6

4.a3 e5 5.c4 a5 6.Nf3 White gets in control 6...Bc5 (better 6...d6!?=+) 7.Ne5+= Ne5 8.Be5 f6 9.Bb2 Qe7 10.Be2 d6 11.0–0 Nh6 12.d4 Ba7 13.Nd2 c5 (13...0–0 14.Bd3+=) 14.d5 Bd7 15.Bh5 g6 16.Be2 0–0 17.Nf3 Nf5 18.Qb3 Rab8 19.a4 Ng7 20.Nd2 f5 21.Bc3 f4 22.Ba5 fe3 23.Qe3 (worse 23.fe3 b6 24.Rf8 Rf8 25.Bb6 Bb6–/+) 23...Qf6 (23...Rbe8!? 24.Qe7 Re7+–) 24.Bc3+– Qf7? (24...Qd8 25.Rfe1+–) 25.Bf3 (25.Ne4!? Nf5 26.Nd6 Ne3 27.Nf7 Rf7 28.fe3 Re7+–) 25...Rbe8 26.Qd3 (26.Ne4 Bb8+–) 26...Bf5 27.Be4 Qe7 (27...Re7 28.Rae1+–) 28.Rae1 Be4 (28...Qd8 29.Bf5 Nf5 30.Re8 Re8 31.Ne4+–) 29.Ne4 Qh4 (29...Qd8 30.Qd2+–) 30.Nf6 (better 30.Bg7 Kg7 31.Qc3 Kh6 32.Qd2 Qf4 33.Qf4 Rf4 34.Nd6 Re1 35.Re1+–) 30...Rf6 31.Bf6 (better 31.g3!? Qg5 32.Re8 Ne8 33.Qe2+– (33.Bf6?! Qf6 34.Rb1 Qf7+–)) 31...Qf6+– 32.Re8 Ne8 33.Re1 Kf8 (33...Ng7 34.Qb3 b6 35.a5+–) 34.Qe4 (34.Qh3!? Bb6 35.Qd7+–) 34...Qf7 35.Re3 1–0. BeepBeepImAJeep (2610) – abuturab (1690), lichess.org, 2016.

4.Nf3 Nf6 5.Be2 d5 6.0–0 Bg4 7.h3 Bf3 8.Bf3 e5 9.d3 e4 10.de4 de4 11.Qd8 Rd8 (better 11...Nd8 12.Be2 Ne6=+) 12.Be2 (better 12.Bf6!? gf6 13.Be4=) 12...Bd6 13.Bf6 gf6 14.Nc3 h5?? (better 14...Be5 15.Ne4 Ba1 16.Ra1 Ke7–/+) 15.Ne4+= h4 (15...f5!? 16.Nd6 Rd6+=) 16.Nf6 Ke7 17.Nd5 Kd7 18.Rad1 Kc8 19.Bg4 Kb8 20.Nc3 Rdf8 21.Nb5 f5 22.Bf5?? (better 22.Bf3 Ne5 23.Nd6 cd6 24.Rd6 Nf3 25.gf3+–) 22...Rf5–/+ 23.Nd6 cd6 24.Rd6 Rg5 25.f4 Rg3 26.e4 (26.Rf3!?=+) 26...Rhg8–/+ 27.Rf2 Rh3 28.f5 Re3 29.Rf4? (better 29.Re6 Kc8 30.Kh2–+) 29...h3 30.g4 (30.Rg6 Rg6 31.fg6 Rg3–+) 30...Rg3 (better 30...Ne5 31.Rd3 Nd3 32.cd3 Re2–+) 31.Kh2 R3g4 32.Rg4 Rg4 33.Kh3 Re4 34.Kg3 Kc7 35.Rg6 Re1 36.Kf4 (36.Rg7 Kb6 37.Kf4 Rf1 38.Ke4 Rf2–+) 36...Rf1 37.Kg5 Ne5 38.Rg7 (38.Re6 Nf3 39.Kf6–+) 38...Kd6?? (38...Nd7 39.Re7–+) 39.Kf6?? (better 39.Rb7 a5 40.Rb6 Nc6 41.f6–/+) 39...Ng4 (better 39...Nd7 40.Kg5 Rg1 41.Kh6 Rg7 42.Kg7 Ke5–+) 40.Rg4+– b5? (better 40...Rf2!?+–) 41.Rd4+– Kc5 42.Re4 a5?? Black plans b4 (better 42...Kd6+–) 43.Ke6 a4 44.f6 b4 (44...Rh1 45.f7 Rh8 46.Kf5+–) 45.f7 Rf2 (45...Kc6 46.Re5 Rf7 47.Kf7+–) 46.Ke7 (better 46.Re5 Kc4 47.Rf5 Rf5 48.Kf5 Kd4+–) 46...Kd5 47.Re3 Kd4 48.Rd3 Kc4 49.f8Q Rf8 50.Kf8 b3 51.ab3 ab3 52.Rh3 (better 52.Rb3 Kd4 53.Rd3 Kc5 54.Ke7+–) 52...bc2= 53.Rh4 Kc3 54.Rh7 Kd2 55.Rd7 Ke3 56.Rc7 Kd2 57.Rd7 Kc3 58.Ke7 Kb3 59.Rb7 Ka4 60.Rc7 Kb3 61.Rb7 Ka4 62.Rc7 Kb3 63.Rc2 Kc2 ½–½. avz81 (1680) – Peao_Promovido (1685), lichess.org, 2018.

3.e4 Nc6

4.Nf3 d6 5.Nc3 e5 6.d4 Nf6 7.de5 de5 (7...Ne5 8.Ne5 de5 9.Qd8 Kd8=+) 8.Qe2 (8.Qd8 Kd8 9.Bc4 Ke8=+) 8...Nd4 (8...Bg4 9.Qe3–/+) 9.Qd3 Bc5 (better 9...Nf3!? 10.Qf3 Bg4–/+) 10.Ne5= 0–0 11.Qc4?? (11.Na4!? Ne6 12.Qd8 Rd8 13.Nc5 Nc5 14.f3=) 11...Bb6?? (11...Nc2 12.Ke2 Na1 13.Qc5 b6–/+) 12.0–0–0=+ c5 13.Nf3 Be6 14.Qa4 a6 (14...Qb8 15.Rd2–/+) 15.Nd5 (better 15.Bc4!?=+) 15...Nd5–/+ 16.ed5 Qd5 17.Nd4 (17.c3 Qc6 18.Qc6 Nc6–/+ (worse 18...bc6 19.cd4 Rfd8 20.a3+–)) 17...cd4 18.Bd3 (18.Bd4 Rfd8 19.c3 Qg5 20.Kb2 Bd4 21.cd4 Qf6–+) 18...Qa2 (better 18...Bc5!? 19.f3 b5–+) 19.Qa2–/+ Ba2 20.Be4 Be6 (20...Rfd8 21.Bb7 Ra7 22.Be4–+) 21.Bb7 (21.Bd4 Bd4 22.Rd4 Ra7–/+) 21...Rab8 (21...Ra7 22.Be4 f5 23.Bd3–+) 22.Be4 (22.Ba6 Ra8 23.Bd3 Ra2=+) 22...Rfc8 (22...Rfd8 23.Rd2–+) 23.Bd3? (better 23.Bd4 f5 24.Bb6 fe4 25.Bd4=+) 23...a5–+ 24.Rhe1 a4 25.Ba3 (25.Re4 Rd8 26.Rh4 h6–/+) 25...Bc5 (25...Ba5!? 26.Re5 Bc3 27.Rf1–+) 26.Bc5 Rc5 27.Kd2 a3 28.Ra1 Ra5 29.Re4 a2 (better 29...Rb4!?–+) 30.Rd4–/+ g6 31.Bc4?? (better 31.Kc1!?=+) 31...Rb1 (better 31...Bc4 32.Rc4 Rb1 33.Ra2 Ra2–+) 32.Ra2 Ra2 33.Ba2 Ba2 34.Ra4 Be6 35.Ra8 (35.h4 Kg7–+) 35...Kg7 36.Ra5 Rh1 37.Ra3 (37.Ke3–+) 37...Rh2 38.Rg3 h5 39.f3 (39.Ke3 h4 40.Rg5 f6–+) 39...h4 40.Rg5 h3 (better 40...f6 41.Ra5 Rg2 42.Kd3 h3–+) 41.Rc5 (41.Ke2 hg2 42.Kf2–+) 41...Rg2 (41...hg2 42.Re5 g1Q 43.Kc3 Qa1 44.Kd3 Qe5 45.f4 Rh3 46.Kd2 Qe3 47.Kd1 Rh1) 42.Kc3 h2 43.Kb4 h1Q 44.c4 Qe1 (44...Qb1 45.Kc3 Qb2 46.Kd3 Rd2 47.Ke4 Qd4) 45.Kb5 Rc2 (45...Rb2 46.Kc6 Qb4 47.Rb5 Qc4 48.Kd6 Rb5 49.Ke7 Rb7 50.Kd6 Qd5) 46.Kc6 Qd2 47.Re5 (47.Kb7 Qd7 48.Kb6 Qd6 49.Ka5 Qc5 50.Ka4 Ra2 51.Kb3 Qc4) 47...Qc3 (47...Rc4 48.Rc5 Qd5 49.Kc7 Rc5 50.Kb6 Rb5 51.Kc7 Rb7) 48.Re6 Qd3 (48...Qc4 49.Kb7 Qd5 50.Ka7 fe6 51.f4 Rb2 52.Ka6 Qa8) 49.Re5 (49.Re4 Qf3 50.Kd6 Qe4 51.c5 Qd4 52.Kc6 Rc5 53.Kb7 Qb4 54.Ka6 Ra5) 49...Rc4 (49...Qc4 50.Kd7 Qd4 51.Ke7 Rc7 52.Ke8 Qd7) 50.Rc5 Qd4 (50...Qd4 51.Rc4 Qc4 52.Kd7 g5–+; 50...Qf3 51.Kc7 Rc5 52.Kb6 Qc6 53.Ka7 Ra5 54.Kb8 Ra8) 0–1. FeegLood (2840) – Seppo (2550), lichess.org, 2015.

4.Nf3 e5 5.Ne5 Ne5 (5...Qe7 6.Nc6 Qe4 7.Be2 dc6 8.0–0=+) 6.Be5 d6 7.Bb2 Nf6 8.Nc3 Be7 9.Bc4 0–0 10.Qf3 Be6 11.Bb3 Bb3 12.ab3 Nd7 13.Nd5 Ne5 14.Be5 (14.Qc3 Bg5+=) 14...de5= 15.Qe3 c6 (15...Bg5 16.Qc3=) 16.Ne7+= Qe7 17.Ra7 Ra7 18.Qa7 Qb4 19.Qe3 Ra8 20.0–0 Ra2 21.Rc1 Qa3 22.Qe1 Qc5 23.Qd1 h6 24.h3 Qd4 25.d3 Qc3 26.Kf1 b5 27.Ke2 (27.Qe1 Qd4=) 27...g6 (better 27...Qb3! 28.Kf1 Qb2–/+) 28.Qd2+= Qd4 (better 28...Qc5!?+=) 29.Qh6+– Qb2 30.Qd2 Qd4 31.Kd1 c5 Black plans b4 32.Rb1 b4 33.Qe3 Qc3 34.Qd2 Qd4 35.Rc1 Kg7 36.Qe3 Qc3 37.Qd2 Qd4 38.Ke2 Qb2 39.Kf1 (39.f4 ef4 40.Qf4 Qc3+–) 39...Qd4 (better 39...Qb3! 40.Qh6 Kh6 41.cb3 Rd2+=) 40.f4 Qb2 41.fe5 Qe5 42.Kg1 Qd4 43.Kh2 Ra6 (43...Qe5 44.Kh1+–) 44.Rf1 Ra2 45.Qf2 Qe5 46.Kg1 f6 47.Rc1 Qb2 48.Qd2 (48.Qe1+–) 48...Ra1? (better 48...Qb3! 49.Kh1 Qb2=) 49.Ra1+– Qa1 50.Kf2 Kf7 51.Qe3 Qc3 52.Qe2 Qd4 53.Kf3 Qc3 54.g4 (54.h4 Ke7+–) 54...g5 55.Qf2 Ke6 56.Kg2 Ke7 57.h4 gh4 58.Kh3 (58.Qh4?! Qc2 59.Qf2 Qc1+=) 58...Ke6 59.Kh4 Ke7 60.Kg3 Qe5 61.Kg2 Qe6?? (better 61...Qc3+–) 62.Kf1 (62.Kf1 Qe5 63.Ke2+–) 1–0. FeegLood (2775) – Reppko (2245), lichess.org, 2015.

2.b5 Na5

3.a4 a6 4.c4 Nc4–/+ 5.Qc2 (5.ba6 b6–/+) 5...d5 (5...ab5 6.e4–+) 6.e3 (6.ba6!? Ra6 7.Nc3–/+) 6...ab5–+ 7.Bc4 (7.Nc3 c6–+) 7...dc4 (7...bc4 8.Bb2–+) 8.Bb2 c6 (8...ba4 9.Qc4 Be6 10.Qf4–+) 9.Ne2 (9.ab5 Ra1 10.Ba1 Qa5–+) 9...Nh6 (9...Qd3 10.Qd3 cd3 11.Nec3–+) 10.0–0 (10.ab5 Ra1 11.Ba1 cb5–+) 10...Bf5 (10...Qd3 11.Qd1 Ra4 12.Nbc3 Ra1 13.Qa1–+) 11.Qc3? (better 11.e4 Qd3 12.Qd3 cd3 13.Ng3–+) 11...ba4 (11...Bd3 12.Re1 ba4 13.Nf4–+) 12.Ng3 (12.Nf4 b5–+) 12...b5 (12...Bd3!? 13.Re1–+) 13.Nf5 Nf5 14.Ba3 (14.e4 Nh4–+) 14...e6 15.Bf8 Rf8 16.g4 (16.d4 Nh4 17.Nd2 Qd5–+) 16...Nh4 17.Qg7 (17.f4 g5–+) 17...f5 (better 17...Qd5 18.f3 Nf3 19.Rf3 Qf3 20.Nc3–+) 18.Qh7 (18.gf5 Nf3 19.Kh1 Qd7–+ (19...Nd2?! 20.Nd2 Qd7 21.Qh6+=; 19...ef5 20.Qg2 Qd3 21.Nc3 Nd2 22.Qc6 Kf7 23.Qb7 Ke6 24.Qc6 Qd6 25.Qd6 Kd6 26.Rfd1–/+)) 18...fg4 19.Qh5 (19.Ra2 Qf6 20.Nc3 Nf3 21.Kg2 Ne1 22.Kg1 Qf3–+) 19...Rf7 (better 19...Kd7!? 20.f4 gf3 21.Kf2–+) 20.Qg4 Nf5 (better 20...Nf3!? 21.Kh1 Kd7 22.h4–+) 21.Kh1 Rg7 (21...b4 22.Rg1–+) 22.Qh5 (22.Qf3 Ra6–+) 22...Kf8 (22...Kd7 23.Nc3 Qh4 24.Qh4 Nh4 25.f4–+) 23.Nc3 (23.Qf3 Ke7 24.Qc6–+) 23...Qf6?? (23...Qh4 24.Qf3 Rh7 25.h3–+) 24.Ne4?? (better 24.Qh8 Kf7 25.Qa8+–) 24...Qe5?? (better 24...Qg6 25.Qf3 Qg4 26.Qg4 Rg4–+) 25.Qh8–/+ Kf7 (better 25...Ke7 26.Qa8 Qe4 27.f3 Qh4–/+) 26.Qh5?? (26.Ng5 Ke7 27.Qa8 Rg5 28.Qc6=) 26...Rg6?? (better 26...Ke7 27.f3 a3–+) 27.Ng5+= Kf6 28.f4 Qe4?? (better 28...Qd5 29.e4 A) 29...Qd2?? A1) 30.ef5?! Qd5 (30...ef5 31.Rad1 Qd3 32.Rd3 Re8 33.Rd7 Re7 34.Qh8 Rgg7 35.Rd6 Re6 36.Re6) 31.Nf3 Qf5 32.Qh4 Kf7+=; A2) 30.Rad1 Qh2 31.Qh2+–; B) 29...Qd3+=) 29.Ne4+– Kf7 30.Rg1 Rag8 31.Ng5 (31.Rg6 Rg6 32.Rg1 Ne7 33.Qh7 Kf8 34.Nd6 Rg1 35.Kg1 b4 36.Qf7) 31...Ke7 32.Qf3 (32.Ne6 Rg1 33.Rg1 Rg1 34.Kg1 Ke6 35.Qg6 Kd7 36.Qf5 Kc7 37.Qe5 Kd7+–) 32...Kd7 (32...Rc8 33.Qe4+–) 33.e4 (better 33.Ne6 Rg1 34.Rg1 Rg1 35.Kg1 Ke6 36.Qc6 Nd6 37.f5 Kf5 38.Qd6 Ke4 39.Qd4 Kf5 40.Qd5 Kf6 41.Qb5 a3+–) 33...Nd4 34.Qf2 (better 34.Qh5 c5 35.f5 ef5 36.ef5 Nf5 37.Ne4 Rg1 38.Rg1 Rg1 39.Kg1+–) 34...Nb3 (34...c5+–) 35.Qa7 Kd6 36.e5 (36.Nf7) 36...Kd5+– 37.Qd7 (better 37.Qe7 Rg5 38.fg5 Rd8 39.Qd8 Kc5+–) 37...Kc5 38.Ne4 (better 38.Ne6 Kb6+–) 38...Kb4 (38...Kb6 39.Rg6 Rg6 40.Qd8 Ka6 41.Qc7+–) 39.Qd6 Ka5 40.Rg6 (40.Qc6 Rg1 41.Rg1 Rg1 42.Kg1 Kb4 43.Qd6 Ka5+–) 40...Rg6 41.Rg1 (41.Qc6 Rg8 42.Nd6 Rb8 43.Qc7 Kb4 44.Qb8 Nd2 45.Qb5 Kc3 46.Ra3 Kc2 47.Qa4 Nb3 48.Qc4 Kd1 49.Qb3 Kc1 50.Ra1 Kd2 51.Ra2 Ke1 52.Qb1) 41...Rg1 42.Kg1 b4 43.Qc6 (43.Qc7 Ka6 44.Qc6 Ka7 45.Nd6 Na5 46.Nb5 Kb8 47.Qc7 Ka8 48.Qc8) 43...c3 (43...Nd4 44.Qc7 Kb5 45.Nd6 Ka6 46.Qb7 Ka5 47.Nc4) 44.dc3 (44.Nd6 Nd2 45.Qb5) 44...bc3+– 45.Qc3 Kb5 46.Qd3 (46.Nd6 Kb6 47.Qb4 Kc6 48.Qb5 Kc7 49.Qb7 Kd8 50.Qc8 Ke7 51.Qe8) 46…Kb4+– 1–0. afsharian – phonix33, lichess.org, 2018.

3.a4 Nc4 4.e3 (4.e4 Nd6 5.e5 Nf5=) 4...Ne5 (4...d5 5.Bc4 dc4 6.Nf3=) 5.d4+= Ng6 6.h4 (better is 6.Nf3+=) 6...d5?? (better is 6...e6=) 7.h5+– Nf4 (7...Bf5 8.Bd3 Bd3 9.cd3+–) 8.ef4 e6 (8...Nf6 9.Bd3+–) 9.Ba3 Ba3 10.Ra3 Nf6 11.g4 (11.Nf3 0–0+–) 11...Bd7 (11...Qd6 12.h6 g6 13.g5 Qf4 14.Nf3+– (14.gf6?! Qe4 15.Ne2 Qh1+=)) 12.g5 Ng8 13.h6 (13.Bd3 Ne7+–) 13...gh6 14.gh6 (14.Qd2 Qe7+–) 14...Qe7 (14...Qf6 15.Rah3+–) 15.Rb3 (15.f5 Qb4 16.c3 Qe7+–) 15...Nf6 (15...Qf6 16.Rbh3+–) 16.Nf3 c6 (16...Rg8 17.a5+–) 17.Ne5 Bc8 (17...c5 18.f5+–) 18.Qd3 (18.bc6 bc6 19.Nc6 Qc7+–) 18...Nd7 (18...c5 19.dc5 Ne4 20.Qe3+–) 19.Qg3 (19.bc6 bc6 20.Nc6 Qd6+–) 19...Rf8 (19...c5 20.Qg7 Rf8 21.Nd7 Bd7 22.Qh7 cd4 23.Qg7+–) 20.Qg7 c5 (20...Nf6 21.bc6 b6 22.Rg1+–) 21.Qh7 cd4 22.Qg7 Ne5 23.Qe5 Qc5 24.Bd3 f6 25.Qh5 Kd8 26.h7 Bd7 27.h8Q f5 28.Qg5 Kc7 29.Qe5 Qd6 30.Qd6 Kd6 31.Qg7 (31…Kc7 32.b6 ab6 33.Rh7+–; better is 31.Rh7 Kc7 32.Qg7 Rfd8+–) 1–0. riverborne – yeo1, Live Game Caissa's Web, 2004.

3.a4 c5 4.g3 (4.e4 d5 5.ed5 Nf6=) 4...d6 5.e4 e5 6.Nc3 b6 (6...Nf6 7.Bg2=) 7.Nd5 Nf6 8.Nf6 Qf6 9.Qf3 Qf3 10.Nf3 Be7 11.Bd3 (11.d3!?=) 11...0–0 (11...Bb7 12.Be2 Be4 13.d3–/+) 12.0–0 (12.Be2 f5 13.d3 Bb7–/+) 12...Bg4 (better 12...Bb7–/+) 13.Nh4? (better 13.Kg2=+) 13...c4–+ 14.f3 cd3 15.fg4 dc2 (15...Bh4 16.gh4 dc2 17.Rf3–+) 16.Ra2? (16.Nf5 Rfe8–/+) 16...Rac8 (better 16...Bh4!? 17.gh4 Rac8–+) 17.Nf5–/+ Rfe8 18.d3 (18.Rb2 Rc7–/+) 18…h6 (18...h6 19.Rf2 d5 20.Rac2 Bc5=) 0–1. vknyus – kazakhmonkey, gameknot.com, 2013.

3.a4 d5 4.d3 Qd6 (4...e5 5.Nf3=+) 5.Bd2 Qb6 6.Nc3 e6 7.Rb1 Bc5 (7...Nf6 8.Nf3=+) 8.e3 Bd7 (8...Nf6 9.Nf3=) 9.d4 Bd6 10.Nf3 Nf6 11.Bd3 0–0 12.0–0 Ng4 (12...Rad8 13.Na2 Be7 14.Qe1+–) 13.Qe1 c5? (better 13...Nc4!?+–) 14.Ne2 (14.Nd5 Qd8 15.Ba5 b6+–) 14...Qc7 (14...Nc4 15.Bc4 Qc7 16.Ba2 cd4 17.ed4 Nh2 18.Nh2 Bh2 19.Kh1+–) 15.Ba5 b6 16.Bd2 (16.dc5 Bh2 17.Kh1 ba5+–) 16...Nh2? (better 16...c4 17.Bh7 Kh7+–) 17.Ne5?? (better 17.Nh2 Bh2 18.Kh1+–) 17...Be5 18.de5 Qe5?? (better 18...Nf1!? 19.Qf1 c4–+ (19...Qe5?! 20.c4=)) 19.f4 (19.Bc3 Qh5 20.Nf4 Qh6=) 19...Qh5 20.Ng3 Qh4 (20...Qh6 21.e4 Nf1 22.Qf1=+) 21.Nh1?? (better 21.Nf5 Qh5 22.Qg3 ef5 23.Qh2 Qh2 24.Kh2+–) 21...Ng4?? (better 21...Qh6=+) 22.Qh4+– f5 23.Ng3 Rf6 24.Ne2 (24.e4 c4 25.Be2 Rf7+–) 24...Rh6 (24...c4 25.Bc3 cd3 26.cd3+–) 25.Qe7 Rh2 26.Qd7 Rf8 27.Qa7 (27.Qe6 Kh8 28.Bf5 Nh6 29.Kh2 Nf5+–) 27...Rf7 28.Qb6 Rf6 29.Qd8 (29.Qc5!? d4+–) 29...Kf7 30.b6 Rfh6 31.Ng3 Nf6 32.b7 (32.b7 Kg6 33.b8Q Rh1 34.Nh1 Rh3 35.Qf6 Kf6 36.Qe5 Kf7 37.Rb7 Kg6 38.Qg7 Kh5 39.Qg5) 1–0. afsharian – JardelBarreto, lichess.org, 2018.

3.a4 e5 4.e4 Nf6 5.d3 c6 6.c4 Bd6 7.Nf3 h6 8.Be2 Bb4 9.Bd2 c5? (better is 9...Bd2!? 10.Nbd2 d6=) 10.Bb4+/– cb4 11.Nbd2 Ng4 (better is 11...Qe7!?+/–) 12.h3+– Nf6 13.Ne5 d6 14.Nef3 a6 15.Nd4 Qb6 16.N2f3 ab5 17.ab5 Nh5 18.Nd2?? (better is 18.0–0+–) 18...Qd4 19.Bh5 0–0 20.Nb3 (20.Be2 f5+–) 20...Qb6?? (better is 20...Qc3 21.Nd2 Qd4=) 21.Na5 Ra5 22.Ra5 Qa5 23.0–0 Re8 24.Qa1 b6 (24...Qd8!?+/–) 25.Qa5 ba5 26.Ra1 Re5 27.Be2 f5 28.f3 b3 29.Ra3 (29.Ra5?? b2–+) 29...b2 30.Rb3 f4 31.Rb2 Rg5 (31...Re7 32.d4 Be6 33.b6+–) 32.Ra2 Bh3 33.Bd1 (33.Ra5?! Rg2 34.Kf1 Kf7+–) 33...h5 34.b6 (34.Ra5?! Rg2 35.Kh1 Rb2+=) 34...Bc8 35.Rb2 (35.Ba4 h4+–) 35...Bb7 36.Ba4 h4 37.Kh2 Rg3 38.Bd1 g5 (38...Rg5+–) 39.Rb5 g4 40.Ra5 h3 41.Rg5 Kh7 42.Rg4 Rg2 43.Rg2 hg2 44.Kg2 Kg7 45.Kh3 Kf8 (45...Kf6 46.d4 Bc8 47.Kh4+–) 46.Kg4 Ke7 47.Kf4 Kd7 48.d4 White intends e5 (better is 48.Ba4 Kd8+–) 48...Kc6 49.Ba4 (49.e5!? de5 50.Ke5 Kb6 51.c5 Kc7+–) 49...Kb6 50.Be8 Ba6 51.Bf7 Kc7 52.e5 Kd7 53.Ke4 Bb7 54.Bd5 Ba6 55.f4 Ke7 56.f5 White prepares the advance e6 56...Kf8 57.f6 de5 58.de5 Bc8 59.e6 Ke8 60.Ke5 Kf8 61.Kd6 White plans e7 61...Kg8 62.e7 Kh7 63.e8Q Bf5 (63...Kh6 64.f7 Kg5 65.f8Q Bf5 66.Qg7 Bg6 67.Qgg6 Kf4 68.Qe5) 64.Qh5 1–0. nordlicht (1925) – titleis, gameknot.com, 2012.

3.Bb2 Nc4 (--> 2.b5 Ne5 3.Bb2 Nc4).

3.Bb2 e6 4.e3 Nf6 (--> 1.b4 Nf6 2.Bb2 Nc6 3.b5 Na5 4.e3 e6).

3.Nc3 b6 4.e4+= g6 (4...Bb7 5.Nf3+=) 5.Bb2 (5.Nf3 a6+=) 5...Bg7 6.d4 (6.Nf3 a6+=) 6...e6 (6...a6 7.Nf3=) 7.Nf3 Bb7 (7...a6 8.Bd3+=) 8.Bd3 d6 (8...f5 9.e5+=) 9.0–0+/– Ne7 10.Ne2 c6 (10...a6 11.ba6 Ba6 12.Ba6 Ra6 13.Qd3+=) 11.c4 (11.Bc3 0–0 12.a4 a6+=) 11...cb5 12.cb5 d5 13.e5 0–0 14.h4 (14.Rc1 a6+=) 14...Rc8 (14...a6 15.h5=) 15.Ng3 (15.Qa4 Nc4 16.Ba3 Qd7=) 15...f6 (15...Nc4 16.Qb3=) 16.ef6 Bf6 (16...Rf6 17.Ne5=) 17.Qe2 Qd6 (17...Qd7 18.Rfe1 Nc4 19.Rab1=) 18.h5 (18.Rae1+=) 18...g5 (18...Nc4!?=) 19.Bc1 (19.Rae1 h6+/–) 19...g4 (19...h6 20.Re1+/–) 20.Ne1 (better is 20.Ne5 Be5 21.de5+/– (21.Qe5?! Qe5 22.de5 Nc4=)) 20...Bd4?? (better is 20...Kh8 21.Nc2 Nc4+=) 21.Qg4+– Bg7 22.h6 (22.h6 Rf7 23.hg7 Rg7 24.Bg5+–) 1–0. Wall,Bill – Majic, internet, 2003.

3.Nc3 d5!?=.

3.c4 a6 4.e4= ab5 5.cb5 Nf6 (5...d5 6.ed5 Nf6 7.Nf3=) 6.e5 Nd5 7.Bc4?? (better 7.Nc3 e6 8.Nd5 ed5 9.Nf3=) 7...Nc4–+ 8.Qb3 Ncb6 (8...Ndb6 9.Nf3–+) 9.a4 (9.d4 d6 10.Nf3 Bf5–+) 9...c6 (9...d6 10.Bb2 Nf4 11.g3–+) 10.a5 (10.Nf3–+) 10...e6 (better 10...Nf4 11.g3 Ne6–+) 11.Bb2 Bc5 12.ab6 Ra1 13.Ba1 Qb6 (13...Nb6?! 14.Nf3–/+) 14.Nh3 0–0 15.0–0 f6 (15...Qb5 16.Qb5 cb5 17.d4–+) 16.d3 (16.ef6 Nf6 17.Bf6 Rf6 18.Nc3–+) 16...fe5 17.Be5 Nf6 (17...d6!? 18.Bg3–+) 18.Nd2 (18.Nc3 Ng4 19.Bg3 cb5–/+) 18...Ng4 (18...Qb5 19.Qb5 cb5 20.Rc1–+) 19.Bg3–/+ d5 (19...cb5 20.Ne4–/+) 20.Nf3 (20.bc6 Qc6 21.Nf3 b5–/+) 20...Nf6 (20...Qb5 21.Qb5 cb5 22.d4–/+) 21.d4 (21.Rb1 Bd7–/+) 21...Be7 (21...Bd4 22.Nd4 Qd4 23.Bd6–+) 22.Rb1–/+ e5 23.Ne5 (23.de5 Ne4 Combination; 23.Ne5 Qd4 Deflection; 23.Be5 Bh3 Combination) 23...Bh3 (23...cb5 24.Qd3=+) 24.gh3 (better 24.bc6!? Qb3 25.Rb3 bc6 26.Nc6=+) 24...Qd4–/+ 25.bc6 bc6 26.Qb7 (better 26.Nc6 Qc5 27.Qb7=+) 26...Bc5 (26...Qe4 27.Nc6 Bc5–+) 27.Rf1?? (better 27.Qc6 Kh8 28.Qe6=) 27...Ne4–+ 28.Bh4?? (better 28.Nc6 Qf6 29.Ne5 Bf2 30.Kg2–+) 28...Qe5 29.Qc6 (29.Qa6 g5 30.Kh1 gh4 31.f4 Ng3 32.Kg2 Qe4 33.Rf3 Qc2 34.Qe2 Qe2 35.Rf2 Qf2) 29...Qh5 (better 29...Ng5 30.Qc7 Nh3 31.Kg2 Nf4 32.Kh1 Qe4 33.f3 Qe2 34.Qf7 Kf7 35.Rg1 Qf3 36.Rg2 Qg2) 30.Qe6 Kh8 31.Qg4 Qe5 32.Bg3 (32.Kg2 Qb2 33.Kh1 Bf2–+) 32...Ng3 (32...Nf2 33.Be5 Ng4 34.Kg2 Ne3 35.Kg3 Nf1 36.Kg4 h5 37.Kg5 Kh7 38.Bd4 Be7 39.Kh5 Nh2 40.Bf6 Bf6 41.h4 g6) 33.hg3 (33.Qg3 Qe2 34.h4–+) 33...h5 (33...Rf2 34.Qf3 Rf3 35.Kh1 Rf1 36.Kg2 Qe2) 34.Qg6 Rf6 (34...Rf2 35.Qh6 gh6 36.Rf2 Qe1 37.Kg2 Qf2 38.Kh1 Qg1) 35.Qc2 (35.Qd3 Rf2! 36.Rf2 Qe1 37.Qf1 Bf2 38.Kg2 Qf1 39.Kf1 Bg3 40.Ke2–+) 35...Qg3 36.Kh1 Qh3 37.Kg1 Qg4 38.Kh1 Qh3 (38...Rf3 39.Qh7 Kh7 40.Re1 Rh3) 39.Kg1 Rf3 (39...Qg3 40.Kh1 Qf3 41.Kg1 Rf4 42.Qh7 Kh7 43.Kh2 Rh4 44.Kg1 Rh1) 40.Qg6 (40.Qh7 Kh7 41.Re1 Bf2) 40...Rg3–+ 41.Qg3 Qg3 42.Kh1 Qf3 43.Kg1 (43.Kg1 h4 44.Kh2 h3 45.Rg1 Bd6 46.Rg3 Qg2) 1–0. afsharian – Himanshu446, lichess.org, 2018.

3.c4 d5 (3...Nc4 4.e4 d5 5.Nc3–/+) 4.c5 (4.cd5 Qd5 5.e3 Nc4=) 4...Nf6 (4...e5 5.Qc2=+) 5.Qa4= Nc4 6.d3 Ne5 7.d4 Nc4 8.e3 Bd7 (8...e5 9.Bc4 dc4 10.Nf3 ed4 11.ed4=) 9.Bc4+= dc4 10.Qc4 a6 11.b6 (11.ba6 Ra6 12.Nf3 e6+–) 11...e6 (11...cb6 12.Nf3–/+) 12.Nf3 (better 12.bc7 Qc7 13.Nc3+=) 12...cb6–/+ 13.cb6?? (13.Ba3 Rc8–/+) 13...Qb6 (better 13...Rc8 14.Qc8 Qc8–+) 14.Nbd2 Bb4 (14...Rc8 15.Qd3–/+) 15.0–0 0–0 (15...Nd5!? 16.Qb3 Bc3 17.Qb6 Nb6=) 16.Rb1 Bd2?? (better 16...Nd5 17.e4 Bb5=) 17.Rb6+– (17.Nd2?! Qa5 18.Qb3 Bc6=; 17.Bd2?! Qd8 18.Rfc1 Bc6=) 17...Bc1 (17...Rfc8 18.Qc8 (18.Bd2?! Rc4 19.Rfb1 Rc2=; 18.Nd2 Rc4 19.Nc4 Bb5+–) 18...Rc8 19.Bd2+–) 18.Rc1 Rac8 19.Qf1 Bc6 20.Ne5 Ne4 (20...Bd5 21.f3 Rcd8 22.e4+–) 21.Nc6 bc6 22.Rbc6 Nd2 (22...Ra8 23.Qd3 Nf6 24.Ra6+–) 23.Qa6 Rc6 24.Qc6 h6 25.f4 Rd8 26.Kf2 g5 27.fg5 hg5 28.Ke2 Rd5 29.Kd2 Rf5 30.Qc8 (better 30.Qe8 Kg7+–) 30...Kg7 31.Ke2 Kg6 32.Rf1 (32.Qg8 Kh6 33.g4 Rb5 34.Rc7 Rb2 35.Kf3 Rb8 36.Qf7 Rf8 37.Qf8 Kg6 38.Qg7) 32...Rb5 33.Qg8 Kh5 34.Qf7 (34.Qh7 Kg4 35.Qh3) 34...Kg4 (34...Kh4 35.Qh7 Kg4 36.Qh3) 35.Qf3 Kh4 36.Qh3 1–0. Agiant – Tins100, lichess.org, 2018.

3.d3 Nf6 4.Bd2 c6 5.c4 Qb6?? 6.Nc3?? Ng4 7.e3+= Ne5 8.Nf3 Ng6 9.Rb1 Qc7 10.d4 e6 11.c5 Nc4?? 12.Bc4+– cb5 13.Nb5 Qd8 14.e4 a6 15.Nd6 Bd6 16.cd6 Qf6 17.Bg5 Qf3 18.Qf3 b5 19.e5 bc4 20.Qa8 c3 21.Qc8 1–0. ureo – madidog, ChessWorld.net, 2005.

3.d4 Nf6 4.Nf3 d5 5.e3 Bg4 6.h3 Bf5 7.Ba3 Nc4 8.Bc4+= dc4 9.Qe2 Qd5 10.Nc3 Qe6 11.Ng5 Qd7 12.Qc4 Bg6 13.e4 h6+= 14.e5 hg5= 15.ef6 gf6 16.Nd5 Rc8 17.Ne3 c6 18.bc6 Rc6 19.Qa4 Bc2 20.Qa7= Be4 21.f3 Bd3 22.Rd1 Bg6 23.Rc1 Rc1 24.Bc1 Qc6 25.Bb2 e6 26.Qa8 Kd7=+ 27.Qa5 Bd6 28.d5 ed5 29.Qd5 Qd5 30.Nd5 Ke6 31.Nf6 Ra8 32.Kd1? Bb4–+ 33.Ne4 Ra2 34.Ng5–/+ Kf5 35.Kc2 Kg5 36.Kb3 Rb2 37.Kb2 Kh4 38.Rd1 Kg3–+ 39.Kb3 Bf8 40.Rd2 b5 41.Kc3 b4 42.Kb3 Bf5 43.Rd5?? Be6 44.Kc4 Kg2 45.f4 b3! 46.Kd4 Bg7 47.Ke4 Bd5 48.Kd5 b2 49.h4 b1Q 50.h5 Qd1 51.Kc6 0–1. NN – Fritz 8, 2004.

3.e3 c5 4.Bb2 Nf6 5.Nf3 e6 6.Be2 b6 (6...d5 7.0–0=) 7.0–0 Be7 (7...d5 8.d3=) 8.d3 (8.Re1 d5=) 8...a6= 9.a4 0–0 10.Nbd2 d5 11.c4 Nd7 (11...Bd6 12.Bc3=) 12.Qc2 Bf6 13.Nb3 (13.Bf6 Qf6 14.cd5 ed5=) 13...Nb3 14.Qb3 Bb2 15.Qb2 a5 (15...Bb7 16.Rfd1=) 16.Nd2 (16.Qc2 Bb7=) 16...Bb7 17.f4 Qc7 18.Bf3 Rad8 19.Rac1 d4 20.Bb7 (20.ed4 Bf3 21.Rf3 cd4=) 20...de3 21.Ne4 Qb7 22.Rf3 (22.Rce1 e5=) 22...f6 23.Re1 Qc7 24.Ree3 Rf7 25.Nc3 Nf8 (25...Qd6 26.Qa1=) 26.f5+= Qd6 27.fe6 (27.Qf2 e5+=) 27...Ne6= 28.Nd5 Nc7 (28...h6 29.Rf1=) 29.Nf4 (29.Nc7 Rc7 30.Qe2 Qd4+=) 29...Re7= 30.Re7 Qe7 31.Qf2 Qd6 (31...Re8 32.Qg3=) 32.h3 Re8 33.Re3 Re5 34.Ne2 Ne6 35.Kh1 Re3 36.Qe3 Kf7 37.Qe4 Qe5 38.Qe5 fe5 39.g3 e4 40.de4 Kf6 (better is 40...Nf8!?+=) 41.Nf4+– Ke5 42.Nd5 Ke4 43.Nb6 Kd4 (43...g5 44.Nc8+–) 44.Kg2 g5 45.Kf3 (45.g4 h6+–) 45...h5+/– 46.Kf2 (46.g4 h4+/–) 46...Nd8 (46...g4 47.hg4 hg4 48.Ke1+/–) 47.Ke2 Nb7 (better is 47...Nf7!?+/–) 48.Kf3+– Ke5 (48...Nd8 49.h4 gh4 50.g4 hg4 51.Kg4+–) 49.Ke3 Kf5 50.Nd5 Nd6 51.Kd3 h4 (51...Ke5 52.b6+–) 52.g4 Ke5 53.Nc7 (better is 53.b6+–) 53...Ne4?? (better is 53...Nc8 54.Na6 Kd6+–) 54.b6 (better is 54.Ne8 Nf2 55.Ke2+–) 54...Nd6 55.Nb5 Nb7 56.Ke3 Nd8 57.Nc3 Nb7 (57...Kd6 58.Ne4 Kc6 59.Ng5 Kb6+–) 58.Ne4 1–0. Jovanovic,Momir (2045) – Krklec,Daniel (2175), Munich–ch VM2, 2005.

3.e3 d6 4.c4 Qd7 (4...Nf6 5.d4=) 5.Be2 Qe6 (5...a6 6.d4=) 6.Qa4+= Qe5?? (better 6...b6+=) 7.Nc3 (7.Nc3 b6 8.Bf3+–) 1–0. GuestLYLX – GuestNLBK, freechess.org, 2017.

3.e3 g6 4.Bb2 Nf6 5.Nf3 (5.Bf6 ef6 6.Nf3 d5=) 5...Bg7 6.Be2 0–0 7.0–0 a6 8.a4 b6 (8...d5 9.Bd4=) 9.c4 (9.d4 d5=) 9...ab5 (9...c5 10.d4=) 10.ab5+= Nb7?? (better 10...c5+=) 11.Ra8+– 1–0. DEFFM – GuestHWCS, freechess.org, 2018.

3.e4 Nc4 4.a4 Ne5 5.d4 Ng4?? 6.Qg4+– d6 7.Qg3 g6 8.Bd3 Bg7 9.Ne2 Nf6 10.0–0 Nh5 11.Qf3 c5 12.bc6 bc6 13.Nbc3 Bb7 14.a5 Qc7 15.a6 Bc8 16.d5 cd5 17.Nd5 Qd7 18.Bb5! Qb5 19.Nc7 (19...Kd7 A) 20.Na8?! Ba1 21.Be3 Qa6=+ (< 21...Ba6 22.Ra1 Ra8 23.Nd4+=); B) 20.Nb5 Ba1 21.Nd6 Ba6 22.Nf7+–) 1–0. Fritz 10 – NN, 2007.

3.e4 d6 4.d4 Nf6 5.Nc3 e6 6.Bd3 Be7 (6...c5 7.Nf3+=) 7.Nf3 0–0 8.0–0 c5 9.dc5 dc5 10.e5 Nd5 (10...c4 11.Be2 Nd7 12.Bf4+=) 11.Bd2 Nb4 (11...a6 12.a4+=) 12.Be2 Qc7 (12...a6 13.a3 Nd5 14.ba6=) 13.a3 Nd5 14.Nd5 ed5 15.Ba5 Qa5 16.Qd5 Be6 (16...Qa4!?+/–) 17.Qb7+– Rfe8 18.Qe4 (18.Qe4 Rad8 19.Bd3+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

3.e4 Nf6 4.e5 Nd5 (4...Ne4 5.Nf3=) 5.c4+= Nb6 (5...Nf4!? 6.d4 Ng6+=) 6.d3+/– (6.d3 a6 7.a4+/–) 1–0. forsetinn (2345) – olsime (1935), gameknot.com, 2014.

3.Nf3 a6 4.ba6 (4.e4 ab5 5.Bb5 e5+=) 4...Ra6 (4...ba6 5.e4=) 5.e4 (5.d4 Ra8+=) 5...Rb6 (5...Re6 6.Nc3+=) 6.Nc3 Nf6 (6...e6 7.d4 Rc6 8.Nb5+=) 7.e5 Ng8 (7...Ng4 8.d4 d5 9.Na4+/–) 8.d4 (8.Nd5 Rc6 9.d4+/–) 8...Rc6 (8...d5 9.ed6 Rd6 10.Bf4+/–) 9.Bd2 (9.Na4 Rg6 10.Bd3 Rg2+/–) 9...e6 (9...b6!?+/–) 10.Bb5+– Rb6 11.Bd3 (11.Qe2!?+–) 11...Rc6+/– 12.Bb5 (12.Nb5 Nc4 13.Na7 Nd2 14.Qd2+/– (worse is 14.Nd2 Bb4+–)) 12...Rb6+– 13.Bd3?? (13.Qe2 Nc6+–) 13...c5?? (better is 13...Rc6=) 14.Ne4+– Rc6 15.dc5 (worse is 15.Nc5 Bc5 16.dc5 Rc5+–) 15...Bc5 16.Bb5 (16.Nc5?! Rc5 17.Be3 Rd5+/–) 16...Rb6?? (16...Be7+–) 17.Ba5 (17.Nc5?! Rb5 18.Ne4 Kf8+–) 17...Rb5 (17...Qe7 18.Bb6 Bb6 19.Nd6 Kd8 20.Qd2+–) 18.Bd8 Bf2 19.Kf2 Re5 20.Ne5 Nf6 21.Bf6 g6 22.Qd6 1–0. themonkey – chimpu, GameColony.com, 2002.

3.Nf3 c6 4.e4 cb5 5.Bb5 a6 6.Bd3 Nf6 7.e5 Nd5 8.0–0 f6 (8...Nf4 9.Be2=) 9.Nh4 g5?? (9...Nf4 10.g3 Nh3 11.Kg2 Ng5 12.Qh5 Nf7 13.Bh7 d6+/–) 10.Qh5 1–0. michaelbuss – thesnarler, ChessWorld.net, 2008.

3.Nf3 e6 4.h4 c6 5.bc6 Nc6 6.Ba3 Ba3 7.Na3 Nf6 8.Nc4 d5 9.Nb2 Ng4 10.e3 Bd7 11.Be2 Nge5 12.Ne5 Ne5 13.f4 Ng6 14.h5 Nh4 15.g4 Bc6 16.Rh2 d4 17.ed4?? (better is 17.c3=+) 17...Qd4–+ 18.Kf1 Ng2 (better is 18...Qf4 19.Rf2 Qe4–+) 19.Nd3 Nf4 20.c3 Qe4 21.Nf4 Qf4 22.Rf2 Qc7 23.Bf3 Bb5 24.Ke1 0–0–0 25.Rb1 Qe5 26.Be2 Bd3 27.Rb4 Rhf8 28.Ra4 Kb8 29.h6 gh6 30.Qc1? (better is 30.Rf3–+) 30...Be2 31.Re2 Qg3 32.Kd1 Rg8 33.Rae4 Rg4 34.R2e3 Qh4 35.Qb1 Re4 (35...Qh1!? 36.Re1 Qf3 37.Kc1–+) 36.Re4 Qh3 37.Qc2 Qf3 38.Re2 Rd3 39.a3 Kc8 40.Qa4 a6 41.Qc4 Kd7 42.Qh4 h5 43.Qa4 Kc8 44.Qc4 Kd7?? (44...Kb8 45.Qc5–+) 45.Qb3?? (45.Qa4 Kd8 46.Qh4 Kc7 47.Qh2 Kd7 48.Kc2–+) 45...b5–+ 46.Qc2 (46.Qb4 Qf1 47.Re1 Qf5–+) 46...e5 (better is 46...h4 47.c4 Ra3–+) 47.a4 f5 48.ab5 ab5 49.Qa2 Qf1 (better is 49...Qh1!? 50.Kc2 Qd5 51.Qa7 Ke6 52.Qb6 Ke7 53.Qa7 Kf6 54.Qb6 Qd6 55.Qb5 Rg3–+) 50.Re1–/+ Qf3 (better is 50...Qf4 51.Qf7 Kc6 52.Qe8 Rd7 53.Qe6 Kc7 54.Qe5 Qe5 55.Re5 Rf7–/+) 51.Kc1?? (better is 51.Re2=) 51...Qf4 52.Qc2? (52.Qf7 Kc6 53.Qe8 Rd7 54.Qe6 Kc7 55.Qe5 Qe5 56.Re5–/+) 52...e4 53.Qb2 Kc6 54.Qc2 h4 55.Qa2 Rc3 56.Kb1 Rd3 57.Qa6 Kc5 58.Qa7 Kd5 59.Qh7 Rd2 60.Qb7 Kc4 61.Rh1 (61.Qf7 Kc5 62.Qf8 Kb6–+) 61...Qf2 (61...Qd6 62.Qc8 Kb4–+) 62.Qh7 (62.Qf7 Kd4 63.Qf6 Kd3 64.Qe5–+) 62...Rb2 63.Ka1 Ra2 64.Kb1 Qb2# 0–1. Skaki 1.19 – Cilian 4.13, WinBoard BB–11 Boissel K6–2, 1999.

3.Bb2 c6

4.bc6 bc6 5.e3 Rb8 6.Bc3 e6 7.d4 (7.Qg4!?+=) 7...d5 8.Nd2 Nf6 9.Nb3 Nb3 10.ab3 (< 10.cb3 Ne4 11.Ne2 Qh4=+) 10...Qd7 11.Bd3 Bd6 12.Nf3 0–0 13.0–0 Bb4 14.Ne5 Qc7 15.Bb4 Rb4 16.c3 Rb6 17.b4 Bd7 18.Qc2 Rfb8 19.Ra5 Bc8 20.Rfa1 Ra8 21.Qa4 a6 22.Qc2 Bb7 23.f3 h6 24.Qe2 Qc8 25.Bc2 Rb5 26.Nd3 Nd7 27.Nc5 Nc5 28.dc5 Qc7 29.R5a2 Bc8 30.Bd3 Rbb8 31.Ba6 Ba6 32.Ra6 Qb7 33.R1a5 Qc8 34.Qa2 Ra6 35.Ra6 Qb7 36.Qa4 Qc7 37.Qc6 (better is 37.f4!? Rc8 38.Qa5+/–) 37...Qe5= 38.Kf2 Qc3 (38...Qh2? 39.Ra8+–) 39.Qc7 Rb4 40.Ra8 Kh7 41.Qf7?? (41.Ra2–/+) 41...Rb2 (41...Qd2 42.Kg3 Qe1 43.Kh3 Qh4) 42.Kg3= Qe3 43.Ra7?? (better is 43.Qg8 Kg6 44.Kh3=) 43...Qg5 44.Kh3 Qg2 45.Kh4 Qh2 (46.Kg4 Rg2#) 0–1. Hollstein,Gerhard – Gloeser,Sven, Mehlingen PSB–ch HT3, 1999.

4.bc6 Nc6 5.g3 (5.Nf3 d5=) 5...f6 (5...e5 6.e3+=) 6.Bg2 (6.e4 e5=) 6...d5 7.Nf3 (7.Ba3 e5=) 7...Bg4 (7...e5 8.0–0+=) 8.Nd4 (8.h3 Bh5=) 8...Nh6 (8...Nd4 9.Bd4 e5 10.Bc3+=) 9.Nc6 (9.h3 Bc8=) 9...bc6 10.0–0 (10.d4 Rb8 11.Bc1 Nf7=) 10...Rb8 (10...e5 11.c4+=) 11.Bd4 (11.Bc1 e5=) 11...a6 (11...Qd7 12.Bc5=) 12.f3 (12.c4 e5 13.Ba7 Rb2 14.cd5 cd5=) 12...Bf5 (12...e5 13.Be5 fe5 14.fg4 Ng4 15.c4=) 13.Nc3 (13.e4!? Bg6 14.Be3=) 13...e5+= 14.Bf2 (14.Ba7 Rb7 15.Bf2 d4+=) 14...Rb2 (14...Be6 15.f4–/+) 15.Na4 (better is 15.e4 Be6 16.Na4=) 15...Rc2?? (better is 15...Rb4 16.c3 Rb8+=) 16.d3+– Bd3 17.Qd3 (17.ed3 Rf2 18.Rf2 Qc7+–) 17...Rc4 18.Nb6 Rd4 (18...Rb4 19.Qa6 d4+–) 19.Bd4 ed4 20.Qd4 (20.Qa6!? Nf5+–) 20...Nf5 21.Qd3 (21.Qf2 d4 22.Rab1 Bc5+–) 21...g6?? (better is 21...Qb6 22.Kh1 Ne3+/–) 22.Rab1 (22.Na4!? Qa5 23.e4 Qb5+–) 22...Bc5 23.Kh1 Bb6 24.g4 (24.Qa6 Bc7 25.Qc6 Qd7 26.Qf6 Rf8+–) 24...Nd6? (better is 24...Ne7+/–) 25.Qa6+– Bc5 (25...Nc8 26.Qb7 Qd7 27.Rb6 Nb6 28.Qb6 Kf7+–) 26.Qc6 Kf7 (26...Ke7 27.Qc5 Qc8 28.Qd5+–) 27.Qd5 Ke8 (27...Kg7 28.Qc5 Nf7+–) 28.Qc5 Nb7 29.Qb5 (29.Rb7 h5 30.Qe3 Kf8 31.Qe6 Rh7 32.Rh7 Qe8 33.Qf6 Kg8 34.Qg7) 29...Qd7 30.Qd7 (better is 30.Qb7 Rf8 31.Qe4 Kf7+–) 30...Kd7 31.Rb7 Ke6 32.f4 g5 33.f5 Ke5 (33...Kd6 34.Rd1 Kc5 35.Rc7 Kb6 36.Rc3 Kb5 37.Rb1 Ka4 38.Bc6 Ka5 39.Ra3) 34.Rb5 (34.Rd7 Rd8 35.Rd8 h5 36.Rd5) 34...Kd6 35.Rd1 Kc7 (35...Ke7 36.Rb7 Ke8 37.Bc6 Kf8 38.Rd8) 36.Rc5 Kb6 37.Rc2 (37.Rc3 Kb5 38.Rb1 Ka4 39.Bc6 Ka5 40.Ra3) 37...Ra8 38.Ba8 1–0. BorisOwl – stallion, GameColony.com, 2000.

4.e4 d5 5.bc6 Nc6 6.ed5 Qd5 =.

3.d3 c6

4.a4 e5 5.Bd2 (5.Nf3 Qc7=) 5...Nf6 6.Bc3 d6 (6...Bc5 7.e3 d6 8.d4 ed4 9.ed4=+) 7.g3 (7.Qd2 b6=) 7...Bd7 (7...Nd5 8.Bd2=+) 8.Bg2= Rc8 (worse 8...cb5 9.ab5 b6 10.Ba5 ba5 11.Ba8 Qa8 12.Nf3+–) 9.Qd2 b6 10.Ba5 ba5 11.c4 (11.bc6 Bc6 12.Bc6 Rc6=) 11...Be7 (11...d5 12.Qg5 Bb4 13.Kf1=+) 12.e3 (12.bc6 Bc6 13.Bc6 Rc6=) 12...0–0 (12...d5 13.Nc3=+) 13.Ne2 c5 (better 13...d5!?=+) 14.0–0+= Bf5 15.Bb7 (15.Nbc3 Rb8+=) 15...Rb8= 16.Bc6 h5 (16...Bh3 17.Rd1=) 17.h4 (17.Nbc3 Bh3 18.Rfe1 h4+=) 17...d5 18.cd5 Bh3 (18...Nd5? 19.e4 Bh3 20.Bd5 Bf1 21.Kf1+–) 19.Rc1 (19.Rd1 Nd5 20.d4 Nb4+=) 19...Nd5= 20.Kh2 Bg4 21.Nbc3 (21.Bd5!? Qd5 22.Nbc3=) 21...Nb4=+ 22.Be4 Be6 (better 22...f5 23.Bc6 Nc6 24.bc6 Bf3=+) 23.Qe1?? (better 23.Rd1=) 23...f5–+ (23...Nd3?! 24.Bd3 Qd3 25.Rd1–/+) 24.Bf3 Nd3 25.Qf1 Nc1 26.Nc1 (26.Rc1 Bd6 27.Bh5 Bc4–+) 26...e4 (26...Bf7 27.Bc6–+) 27.Bh5 Rf6 (27...Bf6 28.N1e2 g6 29.Nf4–+) 28.Qe1? (better 28.Be2–+) 28...Rh6 29.Be2 Bh4! 30.Kg2 (30.gh4 Qh4 The nicest combinations are those leading to mate) 30...Bf6 31.N1a2 Kf7 32.f3 (32.Rc1 Qh8 33.Qg1 Rd8–+) 32...ef3 (better 32...Qh8 33.Qg1 Ba2 34.Ra2 Bc3 35.Rc2–+) 33.Bf3 Qh8 34.Kf2 (34.Kg1 Rg6 35.g4 Qh3–+) 34...Rh2 35.Bg2 (35.Kg1 Qh3 36.b6 Rh8 37.ba7 Rh1 38.Kf2 Qh2 39.Bg2 f4–+) 35...Be5 (better 35...Qh3! 36.Qf1 Be5–+) 36.Kg1 Bc8 (36...Qh5 37.Rd1 Rh8 38.Qe2 Rh1 39.Kf2 Rd1 40.Qh5 Rh5 41.Nd1 Ba2 42.e4–+) 37.Qd2 (37.Rd1 Qh6–+) 37...Bb7 (37...Bg3 38.e4–+) 38.Bd5 Bd5 39.Qd5 Kg6 40.Rf1 Rf8 41.g4 (41.Qf3 Qh3 42.g4 Qh4–+) 41...Qh3 (41...Qh4 42.Qc6 Kh7 43.Rf4 Bf4 44.Qg6 Kg6 45.gf5 Kh6 46.ef4 Qf2) 42.Qe6 (42.Qf3–+) 42…Kh7 (42...Kh7 43.Qg6 Kg6 44.gf5 Rf5 45.Rf5 Qg2) 0–1. petrobbo (2005) – twister (2005), ChessWorld.net, 2012.

4.c4 cb5 5.cb5 d6 6.e4 e5 7.Nf3 Nf6 8.Be2 Be7 9.0–0 0–0 10.Nc3 b6 11.Bb2 Bg4 12.Rc1 Rc8 13.Qa4 Nh5 14.Nd5 Nf4 15.Nf4 Bg5 16.Ng5 Qg5 17.Bg4 Qg4 18.Nd5 Rc1 19.Rc1 Qe2 20.Qa3 h6 21.Be5 Qd2 22.Bf4 Qe2 23.Qd6 Qa2 24.Qf8 Kf8 25.Rc8 1–0. Gervie – madidog, ChessWorld.net, 2005.

4.bc6 Nc6 5.e4 e5 6.Nc3 Bb4 7.Qd2 Nf6 8.Nf3? 0–0 9.a3 –/+.

3.d4 d5

4.Nd2 Bf5 5.e3 e6 6.c4 (6.Ngf3!?=) 6...Bb4+= 7.Qa4? (better is 7.cd5!? Bc3 8.Ba3 Ba1 9.Qa1 ed5 10.Qc3+=) 7...Bc3–+ 8.g4 (8.Qa3 Ba1 9.Qa5–+) 8...Be4 (8...Ba1?! 9.gf5 Bc3 10.fe6 fe6 11.Ngf3–/+) 9.f3 (9.Ne2 Ba1 (9...Bh1?! 10.Nc3 Nc4 11.Nc4 dc4 12.Qc4–+) 10.Ne4 Nc4–+) 9...Qh4 (worse is 9...Ba1 10.Qa5 Bc2 11.Ne2 dc4 12.Nc4–+) 10.Kd1 Nc4 (10...Ba1?! 11.Qa5 b6 12.Qa6+=) 11.b6 (11.Bc4 Ba1 (11...dc4 12.Ne4 Ba1 13.b6 c6 14.Nd6 Ke7 15.Ba3=) 12.fe4 dc4 13.Qc4 Nf6–+) 11...c6 12.Bc4 Ba1 (12...dc4?! 13.Ne4 Qe1 14.Kc2 Ba1 15.Qc4 ab6 16.Kb1+=) 13.Be2 (13.Bb5 cb5 14.Qb5 Kf8 15.ba7 Qe7 16.fe4 Ra7–+) 13...Bg6 14.Nb3 Bc3 The mate threat is Qe1 15.Bd2 Bd2 16.Nd2 Ne7 (16...Qd8 17.ba7 Qb6 18.Ke1–+) 17.ba7 Nc8 18.Qb3 Ra7 19.Bf1 Qe7 20.a4 Qd8 21.Ne2 Qa5 22.Nc3 (22.h4 Qa4 23.h5 Bd3–+) 22...Nb6 23.h4 h5 (worse is 23...Na4 24.Na4 Qa4 25.h5 Qb3 26.Nb3–+) 24.g5 Na4 25.Na2 (25.Ncb1 0–0–+) 25...0–0 26.Bg2 (26.Rh2 Rfa8–+) 26...c5 27.Ke1 (27.Ke2 cd4 28.ed4 Rc8–+) 27...b5 (27...cd4 28.ed4 Rc8 29.Qb4–+) 28.f4 (28.Ke2 b4 29.Rc1 Rb8–+) 28...Rc8 29.Rf1 (29.f5 Bf5 30.g6 Bg6–+) 0–1. NN – Fritz 8, 2004.

4.Nf3 Bd7 5.a4 (5.e3 Nf6=) 5...c6 (5...Bf5 6.e3=) 6.e3 Nf6 7.Bd3 Ne4 (7...cb5 8.ab5 Nc4 9.Na3 Qa5 10.Bd2=) 8.0–0 (8.Ne5 Bf5+=) 8...e6 (8...cb5 9.ab5 Nc4 10.Bc4 dc4 11.Ne5+=) 9.Ne5+= Bd6 10.Qg4 Be5 11.de5 (worse is 11.Be4 f5 (worse is 11...de4 12.de5 0–0 13.Ba3+/–) 12.Qh5 g6–/+) 11...0–0 12.Be4 (12.Ba3 Re8 13.Be4 de4+/–) 12...de4+= 13.Ba3 Re8 (13...f5 14.ef6 Rf6 15.Rd1+/–) 14.Nc3 (14.Nd2 Kh8+/–) 14...Nc4+/– 15.Ne4 (worse is 15.Qe4 Nd2 16.Qd4 Nf1 17.Kf1 cb5+=) 15...Na3 (15...Ne5!? 16.Qg3 Ng6+/–) 16.Nf6+– Kf8 (better is 16...Kh8 17.Ne8 Qe8 18.Ra3 cb5 19.ab5 Bb5+–) 17.Nh7 (17.Ne8?! Nc2 18.Rac1 Qe8 19.Rc2 cb5+–) 17...Kg8 18.Nf6 Kf8 19.Ne8 (19.Ra3 gf6 20.Rd3 fe5+/–) 19...Qe8 (19...Nc2 20.Rac1 Qe8 21.Rc2 cb5 22.Rb1+–) 20.Ra3 g6 (20...cb5 21.Rd1 ba4 22.Qb4 Kg8 23.Qb7+–) 21.e4 (better is 21.c4 Qe7 22.Rd3 Rd8+–) 21...cb5 (21...Qe7 22.Rh3 Kg8+–) 22.Rh3 f5 (22...Qe7 23.Rh8 Kg7 24.Ra8 ba4+–) 23.Qg5 Qe7 (23...Qd8 24.Qh6 Kf7 25.Qh7 Kf8 26.Qh8 Ke7 27.Rh7) 24.Rh8 Kf7 25.Rh7 1–0. Wall,Bill – Fisherman, internet, 2003.

4.Nf3 Nf6 5.e3 =.

4.Nf3 Nf6 5.Ne5 =.

3.e3 a6

4.a4 ab5 5.ab5 c6 (5...Nf6 6.Nc3+=) 6.c4 (better 6.Nc3+–) 6...Nc4?? (better 6...Nf6=) 7.Ra8+– b6 (7...Nb6 8.Ra7 Nf6+–) 8.Bc4 Qc7 (8...c5 9.Nc3 e6 10.e4+–) 9.bc6 d6 10.Ba6 Qc6 11.Rc8 Kd7 12.Rc6 Kc6 (12...e6 13.Rb6 Kd8 14.Rb7 d5 15.Qa4 Nf6 16.Be2 Bd6 17.Qa8 Bb8 18.Qb8) 13.Qc2 Kd7 (13...Kd5 14.Bb2 b5 15.Bb5 Nf6 16.Qc4) 14.Qc8 1–0. DEFFM – guestHNIC, freechess.org, 2019.

4.a4 b6 5.Bb2 f6 (5...Nf6 6.Nf3=) 6.c4 (6.d4 e6+=) 6...c5 (6...Bb7 7.Nf3=) 7.d4+= Qc7 8.dc5 Qc5 9.Nd2 e5 10.Ngf3 Nc4?? (better 10...Bb7+=) 11.Bc4+– (11.Nc4?! ab5 12.ab5 Ra1 13.Qa1 d5+–) 11...ab5 12.ab5 (12.Bb5!? Bb7+–) 12...Ra1 13.Qa1 Qc7 (13...d5 14.Be2+–) 14.0–0 Bd6 (14...Bb7 15.Qa7 Bd6 16.e4+–) 15.Rc1 Qb7 16.Qa2 Qb8 (16...Nh6 17.Bd5 Qb8 18.Ne4+–) 17.Bf7 (better 17.Bg8 Kd8 18.Qf7+–) 17...Kf8 18.Bh5 (18.Ne4 Ne7 19.Nd6 Qd6+–) 18...e4 (18...g6 19.Bg4 Kg7+–) 19.Qf7 1–0. GuestVHRJ – GuestZMYW, freechess.org, 2017.

4.a4 d6 5.Bb2 Nf6 6.Nf3 Bd7 7.Be2 ab5 8.ab5 c5 9.c4 b6 (9...g6 10.Nc3+=) 10.0–0 Ra7 (10...g6 11.Ng5+=) 11.Nc3 Qa8 (better 11...e6!?+–) 12.d4+– Ne4? (better 12...Qc8+–) 13.Ne4 Qe4 14.Bd3 (14.dc5 dc5 15.Ne5 Qb7+–) 14...Qa8 (14...Qg4 15.dc5 dc5 16.h3+–) 15.dc5 bc5 (15...dc5 16.Ne5 e6 17.Qg4+–) 16.Ng5 (better 16.Bc3 Nb7 17.Qc2+–) 16...h6 (16...f6 17.Nh7 Be6+–) 17.Qh5 g6 (17...hg5 18.Qh8 e5 19.f4 gf4 20.ef4+–) 18.Bg6 fg6 19.Qg6 Kd8 20.b6 Ra6 (20...hg5 21.ba7 Rh6 22.Qg8+–) 21.Nf7 Kc8 22.Nh8 Nc4 (22...Kb7 23.Bc3 Nc6 24.Qg8+–) 23.Qf7 Nb2 (23...Nb6 24.Ra6 Qa6 25.Qf8 Kc7 26.Qe7 Qa2+–) 24.Ra6 Qa6 25.Qf8 Kb7 26.Qe7 Kc6 (26...Qa4 27.Qd8 Bc8 28.Qc7 Ka6 29.Qc8 Kb6 30.Rb1+–) 27.Nf7 Qb6 28.Qd6 Kb5 29.Qd7 Qc6 30.Nd6 Kb6 31.Nc4 (31.Nc8 Kb5 32.Na7 Kc4 33.Rc1 Kb4 34.Nc6 Kb3 35.Qb7 Ka2 36.Rc2 Ka3 37.Rb2 c4 38.Qb4) 31...Nc4 32.Rb1 Ka5 (32...Nb2 33.Rb2 Ka5 34.Qc6 c4 35.Qb5) 33.Qd6 (33.Qa7 Qa6 34.Qc5 Qb5 35.Qb5) 33...Qd6–+ 34.Ra1 (34.h3 Nd2 35.Ra1 Kb5–+) 34...Kb6 (34...Kb5 35.Rb1 Kc6 36.Ra1–+) 35.h3 (35.Rb1 Kc6 36.Ra1 Qd3–+) 35...Kc6 36.Ra6 (36.Re1 Nb6 37.Rf1–+) 36...Nb6 37.e4 Qd1 38.Kh2 Qe2 39.Ra3 Qf2 40.Rf3 Qd4 41.Rf5 Qe4 42.g4 Qe2 43.Kg3 Qe1 44.Kg2 Qe6 (44...Nd5 45.Rf2 c4 46.Rf8 Qe2 47.Kg3 Qe3 48.Kh2 c3 49.Rc8 Kb7 50.Rf8 c2 51.Rf7 Kc6 52.h4 c1Q 53.Rf6 Nf6 54.Kg2 Qcg1) 45.Rf3 c4 46.Ra3 Qf6 (46...Qe5 47.Kf1 c3 48.Ra2 Qb5 49.Kf2 Qc5 50.Kf3 Qd5 51.Kg3 Qa2 52.g5 c2 53.Kf2 c1Q 54.Kg3 Qg5 55.Kf3 Qag2) 47.Rf3 Qb2 48.Kg3 Qc1 (48...Qe5 49.Kg2 c3 50.Rf5 Qe4 51.Rf3 c2 52.Kf2 c1Q 53.Rf6 Kb5 54.Rf5 Kb4 55.Rf3 Qce1 56.Kg2 Qc2 57.Rf2 Qcf2) 49.Rf6 Kb5 50.Rf5 Kb4 51.g5 hg5 52.Kg4 Qf4! 53.Rf4 gf4 54.h4 f3! 55.Kf3 c3 56.h5 (56.Ke3 c2 57.Ke2 c1Q 58.Kf3 Qc4 59.Kg2 Qh4 60.Kf3 Nd5 61.Ke2 Qf6 62.Kd2 Qf1 63.Kc2 Qe2 64.Kc1 Kc3 65.Kb1 Qb2) 56...c2 57.h6 c1Q 58.h7 Qc3 59.Kf4 (59.Kf2 Nd5 60.h8Q Qh8 61.Kg3 Qf6 62.Kg4 Ne3 63.Kg3 Kc4 64.Kh3 Qg6 65.Kh4 Qg4) 59...Qf6 60.Kg4 (60.Ke3 Qh6 61.Kd4 Qh7 62.Ke3 Nd5 63.Kf2 Qf5 64.Kg2 Qf4 65.Kh3 Qg5 66.Kh2 Nf4 67.Kh1 Qg2) 60...Qg7 61.Kf3 Kb3 62.h8Q Kb4 (62...Qh8 63.Kf4 Qf6 64.Ke3 Nd5 65.Ke4 Nc3 66.Ke3 Kb2 67.Kd3 Qe5 68.Kc4 Qd5 69.Kb4 Qb5) 63.Qh4 (better 63.Qg7 Kc5 64.Qc3 Kd6 65.Qf6 Kc7 66.Ke4+–) 63…Nc4–/+ 0–1. DEFFM – GuestCJKG, freechess.org, 2019.

4.ba6 ba6 5.Ba3 Rb8 6.Nf3 Nf6 7.Nc3 e6 8.Bf8 Rf8 9.Be2 Bb7.

4.ba6 ba6 5.Nc3 Rb8 (5...e6 6.Rb1 Nf6 7.f4 Bb7 8.Nf3 Rb8 9.Bd3 Nc6; 5...Nf6 6.Rb1 e6 7.f4 Bb7 8.Nf3 Rb8 9.Bd3 Nc6; 5...Bb7 6.Rb1 Nf6 7.Ba3 e6 8.Bf8 Rf8 9.Nf3 Rb8) 6.Ba3 e6 (6...Nf6 7.Nf3 e6 8.Bf8 Rf8 9.Be2 Bb7) 7.Bf8 Kf8 8.Rb1 (8.Nf3 g6 9.Rb1 Bb7) 8...Bb7 9.Nf3 (9.Qg4 Bc6+=) 9...Nf6 (9...g6+=) 10.Bd3 (10.Qc1 Ke8 11.Qa3 Bf3 12.Rb8 Qb8 13.gf3+=) 10...Ng4 (better is 10...c5!?=) 11.0–0+/– Kg8 12.h3 (12.Qe2 Bf3 13.Qf3 h5+/–) 12...Nh2?? (better is 12...h5+/–) 13.Nh2+– 1–0. Anonymous – Anonymous, internet, 2011.

4.ba6 ba6 5.Nf3 Rb8 6.Ba3 Nf6 7.Nc3 e6 8.Bf8 Rf8 9.Be2 Bb7.

4.ba6 ba6 5.Nf3 d5 6.Bb2 (6.d4 Rb8=) 6...Bg4 (6...Rb8 7.Bc3 Nc6 8.Be2=) 7.Be2 (7.h3 Bh5+=) 7...e6 8.0–0 (better 8.Bd3=) 8...Bd6?? (better 8...Nf6=) 9.Bg7+– Bf3 10.Bf3 (10.Bh8?! Qh4 11.g3 Be2 12.Qe2 Qe4+–) 10...Qh4 (10...Be5 11.Be5 f6 12.Bc3+–) 11.g3 Qg5 (11...Nf6 12.Bh8 Qg5 13.d3+–) 12.Bh8 0–0–0 (12...Nf6 13.Be2+–) 13.Be2 f6 (13...Nc4 14.Bc3+–) 14.Ba6 (14.f4 Qh6 15.Ba6 Kd7+–) 14...Kb8 (14...Kd7 15.f4 Qg6 16.Bd3+–) 15.Qe2 Ne7 (15...c6 16.f4 Qg6 17.Bd3+–) 16.Qb5 Ka7 17.Qa5 Nc6 (17...Rh8 18.Nc3 Nc6 19.Qa4+–) 18.Qb5 Nb8 19.Qb7 1–0. DEFFM – GuestMWNW, freechess.org, 2018.

4.ba6 ba6 5.Nf3 e6 6.Ba3 Qf6 7.d4 Be7 8.Be7 Ne7 9.Qd2 Nec6.

4.ba6 ba6 5.Nf3 Nf6 6.Ba3 e6 7.Bf8 Rf8 8.Nc3 Rb8 9.Be2 Bb7.

4.ba6 b6 A) 5.Bb2 e6 (5...Nf6 6.Nc3 e6 7.Nf3 Nc6 8.Bb5 Ba6 9.0–0 Be7; 5...Nc6 6.Nc3 Nf6 7.Nh3 e6 8.Nf4 Be7 9.Bb5 Ba6; 5...d5 6.Nf3 Nf6 7.Ne5 c6 8.Nc3 e6 9.Bd3 Bd6) 6.Nc3 Nf6 7.Nf3 Nc6 8.Bb5 Ba6 9.0–0 Bd6; B) 5.Nc3 Nc6 (5...e6 6.Bb2 Nf6 7.Nf3 Nc6 8.a7 Ra7 9.Nb5 Ra5; 5...Nf6 6.Qf3 c6 7.Qg3 Ba6 8.Ba6 Ra6 9.Nf3 e6) 6.Nf3 Nf6 7.Bb5 Ba6 8.0–0 e6 9.Ba6 Ra6; C) 5.Nf3 Nf6 (5...Nc6 6.Bb2 Nf6 7.Nc3 e6 8.a7 Ra7 9.Nb5 Ra5; 5...e6 6.Nc3 Nf6 7.a7 Nc6 8.Bb2 Ra7 9.Nb5 Ra5) 6.Nc3 Nc6 7.Bb2 e6 8.Bb5 Ba6 9.Ba6 Ra6; D) 5.Be2 Nf6 (5...e6 6.Nf3 Nf6 7.0–0 Nc6 8.a7 Ra7 9.Nc3 Be7; 5...Nc6 6.Nf3 Nf6 7.Nc3 e6 8.a7 Be7 9.0–0 0–0; 5...Ba6 6.Ba6 Ra6 7.Qe2 Ra8 8.Nf3 e6 9.Nc3 Nf6; 5...d5 6.Nf3 Nf6 7.0–0 Ba6 8.Nc3 Nc6 9.Ba6 Ra6) 6.Nc3 e6 7.Nf3 Nc6 8.0–0 Be7 9.e4 Ba6; E) 5.h3 e6 (5...Nf6 6.Nf3 e6 7.Bb2 Nc6 8.Nc3 Be7 9.Bc4 Ba6; 5...c6 6.Nc3 Nf6 7.Nf3 e6 8.e4 d5 9.e5 Ne4; 5...Nc6 6.Nc3 Nf6 7.Nf3 e6 8.e4 Be7 9.e5 Nd5) 6.Nf3 Nf6 7.Bb2 Nc6 8.Nc3 Be7 9.Bb5 Ba6; F) 5.Na3 Nc6 (5...Nf6 6.Nf3 Nc6 7.Be2 e6 8.0–0 Ba6 9.Ba6 Ra6; 5...e6 6.Nf3 Nc6 7.a7 Nf6 8.Bd3 Ra7 9.Nb5 Ra5; 5...Ba6 6.Ba6 Ra6 7.Qe2 Ra8 8.Nf3 Nf6 9.0–0 g6) 6.Nf3 Nf6 7.Bb2 e6 8.Nb5 Ba6 9.a4 Be7; G) 5.Qf3 Ba6 (5...d5 6.Nc3 Nf6 7.Qf4 c6 8.Nf3 e6 9.e4 de4) 6.Ba6 Ra6 7.Qe2 Ra8 8.Nf3 Nf6 9.Nc3 e6.

4.ba6 e6 5.Qf3 c6 (5...d5 6.Nc3 Nf6 7.Qg3 ba6 8.Rb1 g6 9.Nf3 Bd6) 6.Nc3 b6 7.Nge2 Ba6 8.Nd4 Bf1 9.Rf1 Nf6.

4.ba6 Nf6 A) 5.Nf3 b6 (5...e6 6.Nc3 b6 7.Ne5 Bd6 8.f4 0–0 9.a7 Ra7) 6.Nc3 Nc6 7.Bb5 Ba6 8.0–0 e6 9.Bb2 Bd6; B) 5.Bb2 ba6 (5...b6 6.Nc3 Nc6 7.Nf3 e6 8.Bb5 Ba6 9.0–0 Bd6; 5...e6 6.Nc3 b6 7.Nf3 Nc6 8.Bb5 Ba6 9.0–0 Bd6; 5...Nc6 6.ab7 Bb7 7.Nc3 e5 8.Nf3 Bc5 9.Bb5 Qe7; 5...b5 6.Nf3 Ba6 7.Bf6 gf6 8.Nc3 Rg8 9.Nb5 c6) 6.Nc3 e6 7.f4 Rb8 8.Rb1 Bc5 9.Nf3 Nc6; C) 5.Nc3= b6 6.Nf3 Nc6 7.Bb5 Ba6 8.0–0 e6 9.Bb2 Bd6.

4.Bb2 ab5 5.Bb5 c6 6.Be2 b5 (6...d6 7.f4=) 7.Nf3 (7.a4 ba4 8.Ra4 d6+=) 7...Nf6 (7...d5 8.0–0+=) 8.0–0 g6 (8...d5 9.Ne5+=) 9.a4 ba4 10.d4 (10.Bf6 ef6 11.Ra4 d5+=) 10...Ba6 (10...Qb6 11.Bc1=) 11.Ba6 (11.Ra4 Bg7+=) 11...Ra6 12.Qd3 (12.Ra4 d5+=) 12...Qb6 (12...Rb6 13.Bc3 Nb7 14.Ra4+=) 13.Ra4+– Bg7 14.Rb4!! Qa7 (14...Qb4 15.Qa6 Deflection) 15.Qa6!! Qa6 (15...Qa6 16.Rb8 Mate attack) 16.Rb8 Qc8 17.Rc8 1–0. DEFFM – GuestZZCL, freechess.org, 2018.

4.Nc3 A) 4...Nf6 A1) 5.a4 d5 (5...g6 6.Nf3 Bg7 7.Ba3 0–0 8.Bb4 c6 9.ba6 ba6) 6.Nf3 e6 7.ba6 ba6 8.Bd3 Rb8 9.0–0 Bd6; A2) 5.ba6 b6 6.Nf3 Nc6 7.Nd4 Nd4 8.ed4 e6 9.Bb2 Bb4; A3) 5.Rb1 ab5 (5...g6 6.ba6 b6 7.Nf3 Bg7 8.h4 Ba6 9.Ba6 Ra6) 6.Bb5 g6 7.Nf3 Bg7 8.0–0 0–0 9.d4 d5; A4) 5.h3 ab5 (5...g6 6.ba6 b6 7.Nf3 Bg7 8.Ne5 0–0 9.Qf3 Ba6) 6.Bb5 g6 7.Nf3 Bg7 8.0–0 0–0 9.Bb2 d5; A5) 5.Bb2 ab5 6.Bb5 g6 7.Nd5 c6 8.Nf6 ef6 9.Bd3 d5; B) 4...ab5 5.Bb5 Nf6 (5...g6 6.Bb2 Nf6 7.Nge2 c6 8.Bd3 d5 9.0–0 Bg7) 6.Nf3 g6 7.Bb2 Bg7 8.Ne4 0–0 9.Nf6 Bf6.

4.Nf3 ab5 5.Bb5 c6 6.Be2 d5 7.0–0 Be6 (7...Nf6 8.Bb2=) 8.Nd4 (better 8.Nc3+=) 8...f5?? (better 8...Bd7=) 9.Ne6+– Qc8 10.Ng5 1–0. DEFFM – GuestDWTT, freechess.org, 2019.

4.Nf3 ab5 5.Bb5 c6 6.Be2 Nf6 7.Nc3 d5 8.0–0 g6 9.Ba3 Bg7.

4.Nf3 ab5 5.Bb5 Nf6 6.0–0 g6 7.Nc3 Bg7 8.Bb2 0–0 9.Qe2 d5.

4.Nf3 Nf6 A1) 5.a4 e6 (5...ab5 6.ab5 g6 7.Nc3 Bg7 8.Ba3 0–0 9.Bd3 b6; 5...g6 6.Nc3 Bg7 7.Ba3 0–0 8.Bd3 d5 9.ba6 Ne4; 5...d5 6.Nc3 e6 7.ba6 ba6 8.Bd3 Rb8 9.0–0 Bd6) 6.Nc3 ab5 7.ab5 b6 8.Bd3 Bb7 9.0–0 Bd6; A2) 5.ba6 b6 (5...e6 6.Bd3 Nc6 7.Ba3 b6 8.Qe2 Ba3 9.Na3 Ba6) 6.Nc3 e6 7.a7 Nc6 8.Bb2 Ra7 9.Nb5 Ra5; A3) 5.Nc3 ab5 6.Bb5 g6 7.Bb2 Bg7 8.Nd5 0–0 9.Nf6 Bf6.

3.e3 b6

4.Bb2 a6 =.

4.Bb2 Bb7 5.f4 e6 6.Nf3 Nf6 7.Be2 Be7 8.0–0 a6 9.a4 d5 (9...0–0 10.Nc3=) 10.d3 (10.Ne5 0–0=) 10...c6 11.Nc3 (11.Na3 0–0=) 11...Ng4 12.Qc1 Bf6 13.Nd4 c5 (better 13...Nh6!?=) 14.Ne6+– fe6 15.Bg4 d4 16.Ne4 (16.ed4 Bd4 17.Kh1 Qf6+–) 16...Be4+= 17.de4 Nc4 18.Be6 Nb2 (better 18...Ne3!? 19.e5 Bh4+–) 19.Qb2+– de3 20.e5 Qd4 (20...e2 A) 21.ef6?! A1) 21...ef1B?? 22.fg7 (22.Kf1?! Qf6 23.Qf6 gf6=; 22.Rf1?! Qf6 23.Qb3 Qd4 24.Kh1 ab5=) 22...Ke7 23.Bg4 Qd4 24.Qd4 cd4 25.gh8R (25.Rf1?! Rhg8+–; 25.Kf1?! Rhg8+–) 25...Rh8 26.Kf1+–; A2) 21...ef1R?! 22.Kf1 Qf6 23.Qf6 gf6 24.Re1=; A3) 21...ef1Q 22.Kf1 Qf6 23.Qf6 gf6=; B) 21.Rfe1 Qd2 22.ba6+–) 21.Qd4 (21.c3 Qd2 22.Qd2 ed2 23.ef6 gf6+–) 21...cd4 22.ef6 gf6 23.Rfd1 (better 23.ba6 Ke7 24.Bd5 Ra6+–) 23...Rf8 (23...ab5 24.Rd4 Ke7 25.Bf5+–) 24.ba6 Ke7 25.Bc4 (25.Bc4 Rfd8 26.Rab1+–) 1–0. Tikerpuu,Mati (1950) – Lord,Daniel (1605), 4th Rynia Poland, NATO Championship, 2013.

4.Bb2 Nf6 5.Nf3 a6 6.a4 c6 7.bc6 Nc6 8.d4 e6 9.Bd3 Nb4 10.Nbd2 Qc7 11.Ba3 Nd3 12.cd3 Qc3 (12...Ba3!? 13.Ra3 Bb7=) 13.Bf8+= Kf8 14.0–0 Qd3 (14...d5!?+–) 15.Ne5+– Qf5 16.Ndc4 Rb8? (better 16...Qe4 17.Nf7! Rg8+–) 17.Nd6 Qg5 (17...Qh5 18.Qc1 Bb7+–) 18.Qf3 (18.Ndf7 Qf5 19.Nh8 Bb7+–) 18...Ke7?? (better 18...Qh5 19.g4 Qh4+–) 19.Ne4 (better 19.e4 b5 20.ab5 ab5 21.Ndf7+– (21.Nef7?! Qh5 22.Qa3 Ne4 23.Ne4 Kf7 24.Nd6 Kf6+–)) 19...Ne4 20.Qe4 (20.Nf7 Qf6 21.Qf6 Nf6 22.Nh8 d6=+) 20...f6 (better 20...Bb7 21.f4 Be4 22.fg5 f5–+) 21.f3? (better 21.Nf3 Qf5 22.Qf5 ef5 23.Rfb1=+) 21...fe5–+ 22.Rad1 (22.de5 Bb7 23.Qd4 Rhc8–+) 22...Bb7 23.Qe5 Qe5 24.de5 Rhc8 25.f4 (25.Rb1 Bc6 26.Rb4 b5–+) 25...Rc4 (25...Rc3 26.Rd4–+) 26.Rd6 (26.Rd4 Rbc8–+) 26...Ra4 27.Rfd1 Rd8 (better 27...Bd5!? 28.h4–+) 28.Rb6 Be4 29.Rdd6 (29.Rd2–+) 29...Ra2 30.Ra6 (30.Rb4 Rc8 31.Rbd4 Rg2 32.Kf1 Rh2 33.Rd7 Ke8 34.Kg1 Rh1 35.Kf2 Rc2 36.Rd2–+) 30...Rg2 31.Kf1 Rh2 (31...Rc8 32.Rd1 Rh2 33.Rad6–+) 32.Rd4 (32.Ra7 Rb8 33.Rdd7 Kf8 34.Rf7 Kg8 35.Rg7 Kh8 36.Rg8 Kg8 37.Ra8 Ra8 38.Kg1 Rg2 39.Kf1 Ra1) 32...Bd5 (better 32...Rc8 33.Rad6 Rcc2 34.Rd7 Ke8 35.Rd8 Kf7 36.Rd2 Rcd2 37.Rd2 Rd2 38.Ke1–+) 33.e4 Bb7 34.Ra7 Rc8 35.Rd7 (35.Kg1 Rb2 36.Rd1 Rf8–+) 35...Kd7 36.Rb7 Kd8 (better 36...Rc7 37.Rc7 Kc7–+) 37.Rb1 (37.Kg1 Rd2 38.Rb1–+) 37...Rh1 38.Ke2 Rb1 39.Kd3 Rb3 40.Kd2 Ra8 (40...Rh3 41.f5 Ra8 42.Kc2 Ra2 43.Kb1 Rf2 44.f6 Rh1) 41.Kc2 Rg3 42.Kd1 (42.Kb1 Rc3 43.Kb2 Rc6 44.f5 Rb8 45.Ka3 Ra6) 42...Ra2 43.Kc1 (43.f5 Rg1) 43…Rg1 0–1. bazilishek (1675) – Zebstone (1630), lichess.org, 2020.

4.Bb2 Nf6 5.Nf3 e6 6.d4 Be7 (6...Bb4 7.Nbd2=) 7.Bd3 0–0 8.0–0 c6 9.a4 (9.c4 cb5 10.cb5 Bb7=) 9...Bb7 10.Nbd2 (10.Qe2 Nd5=) 10...d5 (10...Nd5 11.Qb1=) 11.c4 dc4 12.Nc4 Nc4 13.Bc4 cb5 (13...c5 14.Rc1+=) 14.ab5 Bf3 (14...Bd6 15.Ne5+=) 15.Qf3+– (worse 15.gf3 Rc8 16.Qb3 Rc7+=) 15...Qc7 (15...Qd7 16.Rfc1+–) 16.Rfc1 Qd7 17.e4 Bb4 (17...Rac8 18.g3+–) 18.d5 ed5 19.ed5 Qd6 20.Ra4 Bc5 21.Rca1 (better 21.Rd1 Nd7 22.Bd3+–) 21...a5? (better 21...Rfe8 22.Be2 Rac8 23.Bf6 Qf6 24.Qf6 gf6+–) 22.ba6+– b5 23.Bb5 Nd5 (23...Rfb8 24.Bf6 Rb5+–) 24.Rd1 Rfd8 25.Bc4 Qf4 (25...Qb6 26.Bd5 Qb2 27.Ba8 Rd1 28.Qd1+–) 26.Bd5 Qf3 27.Bf3 Rd1 28.Bd1 Rd8 (28...Kf8 29.Rc4 Bb6 30.Be2+–) 29.Bf3 Bf2 (29...Rd2 30.a7 Bf2 31.Kf1 Ba7 32.Ra7 f6+–) 30.Kf2 Rd2 31.Ke3 Rb2 32.a7 g6 (32...Rb3 33.Kd2 Rb2 34.Kc3 Rb3 35.Kb3 h5 36.a8Q Kh7 37.Qd5 g6 38.Qf7 Kh6 39.Qe7 h4 40.Rh4) 33.a8Q Kg7 34.Qd5 Rb3 (34...Rb4 35.Qe5 Kh6 36.Rb4 f6 37.Qe7 Kg5 38.Rb5 Kh4 39.Qh7) 35.Qb3 (35.Qb3 Kf6 36.Rf4 Kg5 37.h4 Kh6 38.Rf7 g5 39.Qe6) 1–0. GuestQTFF – janat, freechess.org, 2020.

4.Bb2 Nf6 5.Nf3 g6 6.d4 Bg7 7.Bd3 Bb7 8.0–0 Nd5 (8...a6 9.c4+=) 9.c4 Nf6 10.Nbd2 c6 11.a4 cb5 (11...a6 12.e4+=) 12.ab5 0–0 13.e4 White plans d5 13...a6 14.e5 (14.ba6 Ba6 15.Qe2 Qc7+–) 14...Ne8 15.ba6 Ba6 16.d5 Nc7 (16...Nb7 17.Nb3+–) 17.Bd4+– Rb8 18.Qc2 Na8 19.Qb2 e6 20.d6 f6 21.ef6 Bf6 22.Bf6 Rf6 23.Ne5 Qc8?? (better 23...Rf4+–) 24.Ng4 Rf8 (24...Bb7 25.Nf6 Kf7 26.Nh7 Qd8+–) 25.Nh6 1–0. DEFFM – tomtomi, freechess.org, 2020.

4.c4 e5 5.Bb2 d6 6.Nf3 Nf6 7.Be2 (7.d4 e4 8.Nfd2 a6=) 7...Be7 (7...a6 8.0–0=) 8.d4 e4 9.Nfd2 d5 (9...a6 10.ba6 Bf5 11.Nc3+=) 10.Nc3 (10.cd5 Qd5 11.Qc2 Qg5+=) 10...Be6 (10...dc4 11.Nc4 Nc4 12.Bc4+=) 11.Qa4 (11.cd5 Bd5 12.Nd5 Qd5+=) 11...0–0 (11...Nc4 12.Nc4 dc4 13.Bc4 Bc4 14.Qc4+=) 12.c5 (12.cd5 Bd5 13.Nd5 Qd5+=) 12...h6 (12...a6 13.cb6 cb6 14.ba6=) 13.0–0 Qc8 (13...a6 14.ba6 Bc8 15.cb6 cb6 16.f3 ef3 17.Rf3 (worse is 17.Bf3 Ba6 18.Rfc1 Nc4 19.Nc4 Bc4+=) 17...Ba6 18.Ba6 Ra6 19.Qb5+=) 14.Rac1 (14.f3 ef3 15.Bf3 a6 16.cb6 cb6=) 14...Bg4 15.Rfe1 (15.Rc2 Be2 16.Ne2 Qe8=) 15...Be2 16.Ne2 (16.Re2 a6 17.cb6 ab5 18.Qb5 c6=) 16...Qd7 (16...a6 17.cb6 ab5 18.Qb5=) 17.c6 Qe6 (17...Qd6 18.Ng3 Qe6 19.Ba3=) 18.Nf4 (18.Ba3 Ba3 19.Qa3 a6=) 18...Qf5 (18...Qd6 19.Nb1=) 19.Bc3 (19.Ba3 Ba3 20.Qa3 Rfe8=) 19...a6 20.Rb1 (20.Bb4 ab5 21.Qb5 Bb4 22.Qb4 Rfd8=) 20...Bd6 (20...ab5 21.Qb5 g5 22.Ne2–/+) 21.Bb4+= Rfd8 (21...Bf4 22.Bf8 Bh2 23.Kh2 Ng4 24.Kh1 Rf8 25.ba6 Qh5 26.Kg1 Qh2 27.Kf1 Qh4 28.Ne4 de4–+) 22.Ne2 (better is 22.Ba5 ab5 A) worse is 23.Qb5 Ra5 (worse is 23...ba5 24.Nh3+=; 23...Bf4 24.Bc3 Bh2 25.Kh2 Ng4 26.Kh1–/+) 24.Qb3 Rda8–+; B) 23.Rb5 Bf4 24.ef4 Qf4 25.Nf1+=) 22...Ng4–+ Threatening mate: Bxh2 23.f4 Nc4?? (23...ef3 24.Nf3 Bh2 25.Nh2 Qf2 26.Kh1 Qh4–+) 24.Nc4= dc4 25.Bd6 Rd6 (25...ab5 A) 26.Rb5? A1) 26...Ra4?! 27.Rf5 Rd6 28.Nc3+=; A2) worse is 26...cd6 27.Qa8 (worse is 27.Rf5 Ra4 28.Rb5 Ra2+=) 27...Qf6 28.Qd8 Qd8 29.h3 Ne3 30.Nc3+–; A3) 26...Qf6 27.Qc4 Qh4–+; B) 26.Ng3 Qf6 27.Qc2–/+) 26.Ng3 (26.Nc3 Nf6+/–) 26...Qd5+= 27.h3 Nf6 28.Rec1 Rdd8 (28...Ra7 29.Kf2=) 29.ba6+/– (29.Qc4?! ab5 30.Rb5 Qc4 31.Rc4 Nd5+=) 29...Ra7 30.Rc4 (30.Qc4 Qc4 31.Rc4 Ra6+/–) 30...Rda8 31.Rb5 Ra6 32.Rd5 Ra4 33.Ra4 Ra4 34.Rd8 Kh7 35.Rc8 (better is 35.d5!? Ra7 36.Ne2+–) 35...Nd5= 36.Nf1 (36.Ne4 Ra2 37.Rf8 f6=) 36...Ra2 37.Rd8 Ra5 (37...Nf6 38.Rf8 Rc2 39.Rf7 Rc6 40.Re7=) 38.g4 (38.Rd7 f6+=) 38...Nb4 (38...g5 39.f5=) 39.Rd7+= Ra7 40.d5 (40.Rf7 Nc6 41.Rd7 h5+/–) 40...b5 (40...Ra5!?+=) 41.d6+/– Ra6 42.Rc7 Nc6?? (better is 42...Rc6 43.Rc6 Nc6+/–) 43.d7+– (43.Rf7?! Ra1 44.Rc7 Nd8+–) 43...b4 (43...Ra1 44.Rc6 Rd1+–) 44.Rc6! Rc6 45.d8Q b3 (45...Rg6 46.f5 Ra6 47.Qb8+–) 46.Qb8 Rc3 47.Nd2 (better is 47.Qb4 Rc2+–) 47...Re3 48.Qb3 (better is 48.Qb7+–) 48...Rb3 49.Nb3 g6 (49...g5 50.f5+–) 50.Kf2 f5 51.Nc5 (better is 51.Nd4!? fg4 52.hg4 Kg7+–) 51...Kg7 52.Ke3 Kf6 (52...Kf7 53.gf5 gf5 54.Ne4+–) 53.Nd7 (53.gf5 gf5 54.Ne4 Ke6+–) 53...Kf7 (53...Ke6 54.Ne5 Kf6 55.Kd4+–) 54.h4 Ke6 55.Ne5 Kd5 (55...Kf6 56.h5 gh5 57.gh5 Ke6+–) 56.Nd7 (better is 56.g5 h5 57.Ng6+–) 56...Ke6 57.Ne5?? (57.Nc5 Kf7+–) 57...Kf6?? (57...Kd5 58.g5 h5 59.Ng6 Ke6+–) 58.h5+– gh5 (58...fg4 59.Ng4 Kg7 60.hg6 Kg6 61.Nh6 Kh6 62.Ke4+–) 59.gh5 Ke6 60.Kd4 Kf6 61.Nd7 Ke6 62.Nc5 Kd6 (62...Kf7 63.Ke5 e3+–) 63.Ne4 (better is 63.Nb7 Ke6+–) 63...fe4 64.Ke4 Ke6 65.f5 Kf6 66.Kf4 Kf7 67.Ke5 Ke7 68.f6 Kf8 69.Ke4 Kf7 70.Kf5 Ke8 71.Kg6 1–0. Nielsen,Joergen Axel – Pedersen,LH, corr Denmark, 1973.

4.Nf3 a6 5.Bb2 =.

4.Nf3 Bb7 5.Bb2 e6 6.a4 Nf6 7.Be2 (7.Bd3 Bb4=) 7...Bd6 (7...Be7 8.Bc3=) 8.0–0 Bf3 (8...a6 9.Nc3=) 9.Bf3+= (9.gf3?! Qe7=) 9...c6 10.d3 (10.Bc3 Qc7 11.h3 a6+=) 10...Qc7 (10...0–0 11.Kh1+=) 11.g3 (11.h3 a6+=) 11...Rc8 (11...a6 12.Bf6 gf6 13.c3+=) 12.c4 (12.Bf6 gf6 13.c4 Be5+/–) 12...cb5 (12...Be5 13.d4 Bd6 14.Nd2+=) 13.ab5 (13.Bf6 gf6 14.ab5 Be5+/–) 13...Qb8 (13...Be5!? 14.Be5 Qe5+/–) 14.Bc3 Nb7 15.Nd2 Nc5 16.Nb3 Nb7 17.Qd2 Be7 18.Qb2 Nd6 19.Be5 0–0 20.Ra2 Nfe8 21.Rfa1 (21...Rc7 22.Ra6+/–; 21.Ra6 Bf6 22.Bf6 Nf6+–) 1–0. algernon (2100) – kabunajones (2020), net–chess.com, 2005.

4.Nf3 Bb7 5.Bb2 e6 6.Be2 Nf6 7.Nc3 A) 7...Be7 8.Rb1 0–0 (8...a6 9.ba6 Ba6 10.Ba6 Ra6 11.Qe2 Ra8= –0.03) 9.0–0 Qb8 (9...Qc8 10.Re1 a6 11.ba6 Ba6= 0.03; 9...Re8 10.Ne5 d6 11.Nf3 a6= 0.00; 9...Bd6 10.Re1 a6 11.ba6 Ba6= 0.22; 9...Qe8 10.Ne5 d6 11.Nf3 a6= 0.03; 9...a6 10.ba6 Ba6 11.Ba6 Ra6= 0.03; 9...Bc5 10.Ne5 a6 11.ba6 Ba6= 0.03) 10.Nd4 c5 11.Nf3 d5= –0.09; B) 7...Bd6 8.Rb1 B1) 8...Qe7 9.0–0 0–0 10.Nd4 c5 11.Nf3 Bc7= 0.09; B2) 8...a6 9.ba6 Ba6 10.Ba6 Ra6 11.Qe2 Ra8= 0.12; B3) 8...Be7 9.0–0 d6 (9...a6 10.ba6 Ba6 11.Ba6 Ra6+= 0.37; 9...0–0 10.Re1 a6 11.ba6 Ba6= 0.06) 10.a4 0–0 11.d3 a6= 0.03; B4) 8...0–0 9.0–0 Be7 (9...Qe7 10.d3 Ba3 11.Ba1 d5= 0.00; 9...a6 10.ba6 Ba6 11.Ba6 Ra6= 0.12; 9...e5 10.d4 e4 11.Nh4 g6= 0.03; 9...Bc5 10.Re1 a6 11.ba6 Ba6= –0.03; 9...Qe8 10.d3 a6 11.ba6 Ba6= 0.12; 9...Bb4 10.Ne5 a6 11.ba6 Ba6= –0.03) 10.Nd4 c5 11.Nf3 d5= –0.03; C) 7...Bc5 8.Na4 C1) 8...Bd6 9.0–0 0–0 (9...a6 10.ba6 Ba6 11.Ba6 Ra6= 0.06) 10.Nc3 a6 11.ba6 Ba6= 0.06; C2) 8...Be7 9.0–0 a6 (9...0–0 10.Nc3 a6 11.ba6 Ba6= –0.06; 9...c6 10.c4 0–0 11.Rc1 d5= 0.09) 10.ba6 Ba6 11.d3 Nc6= –0.16.

4.Nf3 Bb7 5.Bb2 e6 6.Be2 Nf6 7.c4 a6 8.0–0 A) 8...Be7 9.Nc3 0–0 (9...ab5 10.cb5 0–0 11.Qc2 c5= 0.00; 9...d5 10.cd5 ed5 11.Qc2 ab5= 0.00; 9...d6 10.ba6 Ba6 11.d3 0–0= 0.06) 10.Qc2 ab5 11.cb5 c5= 0.00; B) 8...Bd6 9.Nc3 ab5 (9...Be7 10.Qc2 ab5 11.cb5 c6= 0.25) 10.cb5 0–0 11.Qc2 e5= 0.19; C) 8...d5 9.d3 ab5 (9...Bd6 10.cd5 ed5 11.ba6 Ra6= 0.00) 10.cb5 Bd6 11.Qc2 c5= –0.03; D) 8...Bb4 9.Qc2 Be7 10.ba6 Ba6 11.d3 0–0= 0.09; E) 8...ab5 9.cb5 c5 (9...Be7 10.Qc2 c6 11.Nc3 0–0= 0.06; 9...Bb4 10.Qc2 c6 11.a3 Be7= 0.19; 9...Bd6 10.Nc3 0–0 11.Qc2 e5= 0.00) 10.bc6 dc6 11.d4 Bd6= –0.06.

4.Nf3 Bb7 5.Bb2 e6 6.Be2 Nf6 7.c4 Be7 8.0–0 a6 9.Nc3 0–0 (9...ab5 10.cb5 0–0 11.d3 c6= 0.25; 9...Ra7 10.ba6 Ra6 11.Qc2 0–0= 0.00; 9...d5 10.cd5 ed5 11.ba6 Ba6= 0.06; 9...Rc8 10.d3 ab5 11.cb5 0–0= 0.09; 9...d6 10.Rc1 0–0 11.d4 d5= 0.03) 10.Qc2 ab5 11.cb5 c5= 0.00.

4.Nf3 Bb7 5.Bb2 e6 6.Be2 Nf6 7.c4 Bb4 8.Nc3 (8.0–0 a6 9.Qc2 Be7 10.ba6 Ba6 11.d3 0–0= 0.09) 8...0–0 (8...Bf3 9.gf3 Be7 (9...a6 10.Ne4 Be7 11.ba6 0–0= 0.06; 9...0–0 10.Ne4 Be7 11.Qc2 c6= 0.09; 9...Bc3 10.Bc3 0–0 11.Qc2 a6= 0.25) 10.Rg1 0–0 11.Ne4 a6= 0.00) 9.0–0 Bc3 (9...a6 10.Qc2= ab5 11.Nb5 Ne8= 0.09; 9...Be7 10.Qc2 a6 11.e4 ab5= 0.19; 9...d5 10.cd5 ed5 11.Qc2 a6= 0.25) 10.Bc3+= (worse 10.dc3 Ne4=+ (10...a6 11.Ba3 d6= –0.06) 11.Qc2 Qf6= –0.06) 10...Ne4 (10...a6 11.Qc2 ab5+= 0.44) 11.Bb4 Re8 (11...d6+= 0.66) 12.d3 Ng5 13.Nd2 e5 14.Ba5 ba5 15.Nb3 Qf6 (15...c6!?+=) 16.Na5+– Bc8 17.Bg4 Qg6 18.h4 Ne6 19.Re1 f5?? (better 19...Rb8+–) 20.Bh5+– Qh6 21.Be8 g6 22.Qf3 Rb8 23.Qd5 Kf8 (23...Qg7 24.h5 Qe7 25.hg6 Qe8 26.gh7 Kh7 27.Qe5 Qg6+–) 24.Bd7 Bd7 25.Qd7 g5 (25...Re8 26.Nc6+–) 26.hg5 Ng5 27.Qc7 Re8 28.Qa7 Qg6 29.Qc5 Kg7 30.Kf1 e4 31.d4 Ne6 32.Qa7 Kh8 33.d5 Ng7 34.b6 Nh5 35.b7 Ng3 36.fg3 Qg3 37.Reb1 (37.Reb1 Qb8 38.Qd4 Re5 39.Nc6 Kg8 40.Qe5 Qe5 41.Ne5 Kf8 42.b8Q Kg7 43.Rb7 Kh6 44.Qd8 Kh5 45.Rh7) 1–0. Pierre – Kebab1, internet, 2019.

4.Nf3 Nb7 5.d4 Nd6 6.Nbd2 Bb7 (6...a6 7.c4+=) 7.Bb2 Nf6 8.Bd3 g6 (8...a6 9.ba6 Ba6 10.c4+=) 9.0–0 Bg7 10.Re1 e6 (10...Nfe4 11.Ne4 Ne4 12.Ne5+=) 11.e4+– Nh5 12.e5 Nf5 (12...Nc8 13.Ba3+–) 13.Bf5 (better 13.g4 Nf4 14.gf5 Nd3 15.cd3 gf5 16.Qc2+–) 13...ef5 14.c4 g5? (better 14...a6!?+=) 15.d5 g4 16.Nd4 Nf4? (better 16...Qg5+–) 17.Nf5 Bf8 (17...Qg5 18.Nd6! cd6+–) 18.Qg4 Nd3 (18...Ne6 19.Ne4 h5 20.Qg3+–) 19.Ng7 White intends e6 (better 19.Nd6! cd6 20.ed6 Qe7 21.Bh8+–) 19...Bg7 20.Qg7 Rf8 21.e6 (21.Ba3 Nc5 22.Ne4 Qh4 23.Bc5 0–0–0 24.Bf8 Qh5+–) 21...Nb2 (21...de6 22.de6 Qh4+–) 22.ef7 1–0. GuestBZKG – GuestXVGD, freechess.org, 2018.

4.Nf3 d5 5.Bb2 e6 6.Na3 (6.Ne5 Nf6+=) 6...Nf6 7.c4 (7.Ne5!?=) 7...Ba3=+ 8.Ba3 Nc4 (8...dc4?! 9.Bb4=) 9.Bc4 dc4 10.Qa4 Bb7 (10...a6 11.Qc4 ab5 12.Qb5 Bd7 13.Qd3=+) 11.Qc4 Bf3 (11...a6 12.ba6 Ra6 13.Bb2=+) 12.gf3= Qd7 (12...a6 13.Qc6 Nd7 14.Bb2=) 13.Rc1 0–0–0 (13...a6 14.ba6 Nd5 15.Rg1+=) 14.d4+= Kb8 15.0–0 Rc8 (15...Nd5 16.Qc6=) 16.e4 (16.Qc6 Rhd8+=) 16...Ne8 17.e5 Rg8 18.Bb4 (18.Rfe1 Rd8 19.Re4 f5=) 18...f6 (18...Rd8 19.Rfd1=) 19.Rfd1 fe5 (19...Qf7!?=) 20.de5+/– Qf7 21.Qe4 Qh5 22.a4 g5 23.a5 g4?? (23...ba5 24.Ba5 g4 25.f4+–) 24.f4 (24.a6 gf3 25.Kh1+–) 24...Qf7? (better is 24...ba5!? 25.Bc5 Rg6+/–) 25.ab6+– ab6 26.Ra1 c5 (26...c6 27.bc6 Qc7+–) 27.Qa8 (27...Kc7 28.Ra7) 1–0. pumpkin (1675) – hasst, net–chess.com, 2001.

4.Nf3 d6 5.Bb2 Bd7 (5...a6 6.Bc3=) 6.a4 (6.Be2 c6 7.bc6 Nc6+=) 6...e5 7.Nc3 Nf6 8.d3 (8.e4 Be7+=) 8...Qe7 (8...Be7 9.e4=) 9.Be2 Nb7 (9...d5 10.Na2 e4 11.Ne5=) 10.0–0+= Be6 (10...a6 11.ba6 Ra6 12.Nb5+=) 11.Re1 (11.e4 a5+/–) 11...Qd7 (11...a5 12.e4+=) 12.Na2 (12.d4 e4 13.d5 ef3 14.de6 fe6 15.Bf3 d5+=) 12...a5 (12...a6 13.Nc3+=) 13.ba6 (13.Ng5 0–0–0+=) 13...Ra6= 14.d4 Ra4 15.de5 Ra2 (15...Ne4!? 16.Nc3 Nc3 17.Bc3 Ra1 18.Qa1 d5+=) 16.Ra2+/– Ba2 17.ef6 gf6?? (better is 17...g6+–) 18.Qa1 Bd5 (18...Bg7 19.Qa2 0–0 20.Nd4+–) 19.Bf6 Rg8 (19...Bg7 20.Bg7 Rg8 21.Ng5+–) 20.Qa8 Nd8 21.Qd5 Nc6 (21...Be7 22.Bd4 Qh3 23.Bb5 Kf8+–) 22.Bb5 Rg2 23.Kg2 Be7 24.Bc6 Bf6 1–0. St_Jean,Benoit – Harvey,Maurice, Molasses, 2001.

4.Nf3 d6 5.c4 e5 6.d3 Nf6 7.Nc3 Be7 8.Be2 h6 9.Nd5 (9.d4 ed4 10.Nd4 0–0+=) 9...c6 (9...Nd5 10.cd5 a6 11.ba6 Ba6 12.d4 Be2 13.Qe2=) 10.Ne7+= Qe7 11.a4 c5 Black intends e4 12.Nd2 (12.Bd2 a6+=) 12...Bb7 Black plans e4 13.Bf3 d5 14.0–0 e4 15.de4 de4 16.Be2 Qe5 17.Rb1 0–0–0 18.Bb2 Qe7 19.Qc2 Ba8 (19...Rd6 20.Bc3+/–) 20.Rbd1 Rd6 21.Bf6 (21.Bc3!?+/–) 21...gf6 22.Bg4 Kb8 23.Bf5 The pressure on e4 grows (better is 23.Nb3 Nb3 24.Qb3+=) 23...Rd3?? (23...Qe5 24.Bg4 Rg8+=) 24.Be4?? (24.Ne4 Rdd8+–) 24...Be4?? (better is 24...Rd2 25.Rd2 Qe4 26.Qe4 Be4–/+) 25.Ne4+– Rd1 26.Rd1 Rd8 27.Rd8 Qd8 28.Qd2 Qd2 29.Nd2 f5 30.f4 Kc8 31.Kf2 Kd7 32.Kf3 Ke6 33.g4 Nb7 (33...Kf6 34.h4+–) 34.gf5 (34.g5 hg5 35.fg5 Ke5+–) 34...Kf5 35.e4 Kg6 36.Kg4 Nd6 37.f5 Kh7 (37...Kf6 38.Kf4 Ke7 39.e5+–) 38.e5 Ne8 (38...Nb7+–) 39.Ne4 Kg7 40.Kh5 Nc7 41.f6 (41.Nd6 Na8+–) 41...Kh7 (41...Kg8 42.Kh6 Ne6 43.h4+–) 42.Nd6 a6 (42...Ne6 43.Nf7 Nf4 44.Kg4 Ne6+–) 43.Nf7 ab5 44.ab5 Ne6 45.Nh6 Nd4 (45...Nf8 46.Nf7 Kg8+–) 46.Nf7 Nf3 47.e6 Kg8 (47...Nh4 48.e7 Ng6 49.Ng5 Kg8 50.Kg6 Kh8 51.e8Q) 48.h4 (48.Nd6 Nh4 49.e7 Kh7 50.Nf7 Ng6 51.Ng5 Kg8 52.Kg6 Kh8 53.e8Q) 48...Nd4+– 49.Ng5 (better is 49.Nh6 Kf8 50.e7 Ke8 51.Kg6+–) 49...Nf5 50.e7 Nd6 (50...Ne7 51.fe7 Kg7 52.e8Q Kf6 53.Qe6 Kg7 54.Qf7 Kh8 55.Qf8) 51.Kg6 Kh8 52.f7 Nf7 1–0. Hal1958 – Mel, playchess.de, 2002.

4.Nf3 d6 5.d4 a6 +=.

4.Nf3 f6 5.c4 Nh6 (5...a6 6.d4+=) 6.Nc3 c5 (6...e5 7.d4 Bb4 8.Bd2+=) 7.Bd3 (7.Be2 a6+–) 7...e5 (7...a6 8.0–0+=) 8.0–0 Bb7 9.Qc2 (9.Nd5!?+=) 9...Bf3= 10.gf3 Bd6 (10...f5=) 11.Bh7 (better 11.Be4 Rc8 12.Bd5+=) 11...Ke7?? (better 11...f5 12.Bg6 Kf8–/+) 12.Qd3 Qe8 13.Bg6 Qg8 14.Nd5 Kd8 15.Bb2 Qe6 16.Be4 Ng4? (better 16...Rb8 17.f4 ef4 18.ef4 Qg4 19.Kh1 Qh4+=) 17.Bf5+– (17.fg4 Qg4 18.Bg2 e4–+) 17...Qf7 (17...e4 18.fe4 Ne5 19.Be5 Qe5+–) 18.fg4 (worse 18.Bg4 Rh2 19.Qe4 Rh4 20.Nf6 gf6 21.Qa8 Ke7+–) 18...Rh3 (18...Kc8 19.f4 Rb8 20.Be4 ef4 21.ef4+–) 19.Bc3 Qg8 (19...Nb7+–) 20.Nb6! Rb8 (20...ab6 21.Qd6 Double attack (21.Qd6 Discovered attack; 21.Qd6 Decoy)) 21.Qd6 Qh8 22.Qd7 1–0. GuestCQWF – GuestRRVW, freechess.org, 2019.

4.Nf3 f6 5.Bd3 e5 (5...Nh6!?+=) 6.Ne5!+– Bd6?? (6...fe5 7.Qh5 Double attack (7.Qh5 Decoy)) 7.Qh5+– g6 8.Ng6! (8.Ng6 hg6 9.Qh8+–) 1–0. GuestHVPN – GuestVDBD, freechess.org, 2018.

4.Nf3 f6 5.d4+=.

4.Nf3 Nf6 5.Bb2 g6 (5...a6 6.Nc3=) 6.Be2 Bg7 7.0–0 0–0 8.c4 d6 9.d3 e5 10.Nc3 Be6 11.a4 Nb3?? (11...a6 12.Ng5+=) 12.Ra2 (better is 12.Qb3 a6 13.d4 ed4 14.Nd4+–) 12...Nc5 13.d4 ed4 14.ed4 (14.Qd4? Nfe4 15.Qg7 Kg7 16.Ne4 f6 17.Nc5 bc5–+; 14.Nd4?! a6+=) 14...Nce4 15.Ne4 Ne4 16.Bd3 Nf6 17.d5 Bg4 18.h3 Bf3 19.Qf3 (worse is 19.gf3 a6 20.ba6 Ra6+=) 19...Re8 20.Qd1 (20.a5 Nd7 21.Bg7 Kg7+/–) 20...Nd7 21.Bg7 Kg7 22.Re2 Nc5 23.Re8 Qe8 24.Bc2 Qd7 25.Re1 Kf8 26.Qd4 Kg8 27.Qf6 Re8 28.Re8 Qe8 29.Kf1 Nd7 30.Qd4 Qe5 31.Qe5 Ne5 32.Bb3 Nd3 33.g3 f5 34.f4 Nc5 35.Bc2 Kf7 36.Ke2 Kf6 37.Ke3 h6 38.h4 a6 39.Kf3 a5 40.Ke3 h5 41.Kf3 Nd7 42.Ke3 Nf8 43.Kd4 Nd7 44.Ke3 Ke7 1–0. Fournier,Frederic (1985) – manoliyo (1810), Echecs21, 2003.

3.e3 c6

4.a4 a6 5.c4 (5.Nc3 Nf6+=) 5...d5 6.Bb2 (6.cd5 cd5 7.Nf3 Nf6=) 6...dc4 (better 6...Nc4 7.Bc4 dc4 8.bc6 Qb6–/+) 7.Qc2? (7.bc6 Qb6 8.cb7 Qb7 9.Bc3+=) 7...Nb3 8.Bc4? (better 8.bc6 Na1 9.Ba1–/+) 8...Na1 9.Ba1 ab5 10.Bb3 ba4 11.Ba4 (11.Bc4 Nf6–+) 11...e6 (better 11...b5 12.Nc3 ba4–+) 12.Bb2 Ne7 (12...b5 13.Bb3 c5 14.d3–+) 13.Nf3 (13.Nc3 Nf5–+) 13...Nd5 14.0–0 f6 (14...Nb4 15.Qd1–+) 15.Bb3 Be7 16.e4 (16.Nc3 Nb4 17.Qd1 Nd3–+) 16...Nb4 17.Qc4 (17.Qc3 Nd3–+) 17...0–0 (17...Qd3!? 18.e5–+) 18.Nd4 Kh8 19.Ne6 (19.Ba3 Na6 20.Nf3 e5–+) 19...Be6 20.Qe6 Qd6 (better 20...Nd3!? 21.Bc1–+) 21.Qh3 (21.d4–+) 21...Qd3 22.Qe6 Rae8 23.Bc4 Qd6 (23...Bd6 24.Qe8 Qf1 25.Bf1 Re8 26.d3–+) 24.Qh3 b5 25.Bd3?? (better 25.Be2–+) 25...Nd3 26.e5 (26.Ba1 b4 27.Qe3 c5–+) 26...Ne5 (better 26...fe5 27.Ba3 c5 28.Bc5 Nc5 29.Qg4–+) 27.d4 (27.Be5 fe5 28.Rc1 b4–+) 27...Nc4 28.Bc3 b4 29.Ba1 (29.Qd3 Qd5 30.Be1 c5–+) 29...c5 (29...Ra8 30.Qb3 Qd5 31.Bb2–+) 30.Rd1 (30.Qd3 Qd5 31.Rd1 Bd6–+) 30...Bd8 (30...Ra8 31.Qb3 Ra1 32.Qc4 cd4 33.Rf1–+) 31.g3 (31.Qd3 Qd5 32.Qf1 Bc7–+) 31...cd4 (better 31...Re2 32.Qf1 Rfe8–+) 32.Rd4 (32.Qf1 Ne5 33.Nd2–+) 32...Re1 33.Kg2 Qc6 34.f3 Rb1 35.Rh4 Ne3 36.Kf2 Nd1 (36...Qc2 37.Ke3 Re1 38.Kd4 Bb6 39.Kd5 Qc5) 37.Kg2 (37.Kg1 Nb2 38.Qf1 Qf3 39.Rh7 Kg8 40.Rg7 Kg7 41.h4 Rf1 42.Kh2 Rh1) 37…Qc2 (37...Qc2 38.Kh1 Ne3 39.Qf1 Rf1) 0–1. GuestGCPD – GuestHDDK, freechess.org, 2017.

4.a4 cb5 5.ab5 a6 6.c4 e6 7.Bb2 d5 (7...ab5 8.cb5 Nf6+=) 8.Nf3 (better 8.cd5 ed5 9.ba6+–) 8...dc4 9.ba6 ba6?? (better 9...b5=+) 10.Qa4+– Bd7 11.Qa5 Qa5 12.Ra5 Bb4 (12...Rb8 13.Ra2+–) 13.Ra1 f6 (13...Nf6 14.Bc3 Bc3 15.Nc3+–) 14.Bc4 Nh6 (14...a5 15.Ke2+–) 15.Nd4 (15.Ra6 Ra6 16.Ba6 Ke7+–) 15...Ke7 16.Nc3 (16.Ra6 Ra6 17.Ba6 Rb8+–) 16...Rhc8 (16...a5 17.Ke2+–) 17.Ba6 Rcb8 18.Be2 (18.Bd3!? Ra1 19.Ba1 e5+–) 18...Ra1 19.Ba1 Bc3 20.Bc3 (20.dc3?! Rb1 21.Bd1 Ra1+=) 20...Rb1 (20...e5 21.Nf3 Rb1 22.Bd1+–) 21.Bd1 Ba4 22.Ke2 Bd1 (22...e5 23.Nf3+–) 23.Rd1 Rd1 24.Kd1 Ng4 25.Ke2 Nh2 26.f3 e5 (26...g5 27.Kf2 g4 28.Kg1 gf3 29.gf3+– (29.Kh2?? f2–+)) 27.Nb3 (27.Nf5 Kf7+–) 27...Ke6 (27...g5 28.d4 ed4 29.Nd4+–) 28.Kf2 (28.d4 e4 29.Nc5 Kd5+–) 28...Kf5 (28...Kd5 29.Kg1 Nf3 30.gf3+–) 29.Nc5 g5 30.e4 Kf4 (30...Kg6+–) 31.Nd3 (31.Ne6) 1–0. GuestRJPV – GuestSGGZ, freechess.org, 2017.

4.a4 cb5 5.ab5 f6 6.Bb2 (6.d3 e5+=) 6...a6 (6...d5 7.Bd3 Nh6 8.Qh5 g6 9.Qe2+=) 7.c4 (7.ba6 Nc6 8.ab7 Bb7 9.Ra8 Ba8+–) 7...d6 (7...e5 8.ba6 ba6 9.Be5+–) 8.ba6+– ba6?? (better 8...Ra6 9.c5 Ra8+=) 9.Qh5+– g6 10.Qa5 Qa5 11.Ra5 Nh6 (11...Rb8 12.Ra2+–) 12.Nf3 Nf5 (12...Rb8 13.Ra2+–) 13.Be2 1–0. DEFFM – GuestMPPQ, freechess.org, 2018.

4.a4 e5 5.Bb2 d6 6.Nf3 Nc4?? (better 6...e4 7.Nd4 Nf6=) 7.Bc4+– d5 8.Ba2 (8.Bf1 f6+–) 8...e4 9.Ne5 f6 (9...Qg5 10.g3 Bd6+–) 10.Qh5 (10.Qh5 g6 11.Ng6 hg6 12.Qh8+–) 1–0. DEFFM – Edmilson, freechess.org, 2019.

4.Bb2 d5 =.

4.c4 cb5 5.cb5 d5 6.Nf3 =.

4.c4 d5 5.d3 Be6 (5...dc4 6.dc4 Qd1 7.Kd1+=) 6.Bd2 dc4 7.Qa4 b6 8.Ba5 ba5 9.dc4 cb5 10.cb5 Bd7 11.Nf3 g6 12.Nbd2 Bg7 13.Rb1 Nf6 14.Bc4 0–0 15.0–0 Rb8 16.Qb3 (16.Qa3 Ne8+=) 16...e6 (16...Bb5!? 17.Bb5 a6=) 17.a4+= Qb6 18.Ne5 a6 19.Nd7 (worse is 19.ba6 Qc7 20.Nd7 Rb3 21.Nf6 Bf6 22.Rb3 Qd7+=) 19...Nd7 20.Nf3 (20.ba6!? Qa7 21.Qc2+=) 20...Nc5 21.Qa2 ab5 22.Bb5 Qa7 23.Rfc1 Ne4 24.Qc4 Nd6 25.Qc6 Nb5 26.Rb5 Rb5 27.Qb5 Rb8 28.Qc5?? (better is 28.Qd3=) 28...Qc5–+ 29.Rc5 Rb1 0–1. Fournier,Frederic – Fournier,Jean_Noel, Partie Libre (rapide), 1994.

4.c4 e6 5.Bb2 Qb6 (5...d5 6.cd5 ed5 7.Nf3=) 6.Qa4 (6.Bd4 c5 7.Bc3 d5 8.cd5 ed5=) 6...a6= 7.c5 (better is 7.Qc2=) 7...Qc5?? (7...Bc5 8.Bg7 ab5+– (worse is 8...cb5 9.Qd1+–)) 8.Qa5+– b6 9.Qa4 cb5 10.Qg4 Nf6 11.Qd1 (11.Qf3 Qc6+–) 11...Bb7 12.Bd4 Qc7 13.Nf3 Bd6 14.Be2 0–0 15.Bf6 gf6 16.d4 e5 (16...Bb4!? 17.Nbd2 Rfc8+/–) 17.Nbd2 Rae8 18.de5 (18.Rc1 Qd8+–) 18...fe5 19.Rc1 Qb8 20.Nh4 (20.e4 Rc8+–) 20...f5 (20...Ba3 21.Rc2+/–) 21.Bh5 (better is 21.Bd3 e4 22.Bc2+–) 21...Be7? (better is 21...Rc8+/–) 22.Be8+– Qe8 23.Nhf3 Bf6 24.Qc2 Qe6 25.0–0 b4 26.Rfd1 Bd5 (26...d5 27.Qb3+–) 27.Nb3 (27.Nb3 Bf3 28.gf3+–) 1–0. Mroz,Antoni – Nowakowski,Jozef, corr 1AMM Poland, 1991.

4.bc6 Nc6 5.Bb2 e5 6.Nf3 e4 7.Nd4 Nd4 8.Bd4 Nf6 9.Nc3 Bb4 10.Rb1 a5 (10...Bc3 11.Bc3 b6 12.Bc4+=) 11.Bc4 0–0 12.Nd5 Nd5 13.Bd5 d6 14.Be4 Qg5 15.0–0 Bh3 (better is 15...Re8!? 16.Bf3 Be6+–) 16.f4 Qg4 (16...Qe7 17.Qf3 (17.gh3?! Qe4 18.d3 Qc6+/–) 17...Bc8 18.f5+–) 17.Qg4 Bg4 18.c3 (18.Bb7?! Rab8 19.Bd5 Bd2+/–) 18...Bc5 19.Bc5 dc5 20.Bb7 Rad8 21.d4 Rfe8 22.Rfe1 cd4 23.ed4 Re1 24.Re1 g6 25.d5 Rd6 26.Bc6 g5 (26...Bd7 27.Bd7 Rd7 28.c4+–) 27.fg5 Rg6 (27...Bd7 28.Bd7 Rd7 29.c4+–) 28.h4 h6 29.gh6 Rh6 30.g3 f5 31.Re6 (better is 31.Re8 Kf7 32.Ra8 f4+–) 31...Rh7 (31...Re6 32.de6 Kf8+–) 32.d6 f4 33.Rg6 (better is 33.Re8 Kg7 34.Re7 Kh8+–) 33...Kf7 (33...Rg7 34.Rg7 Kg7 35.gf4 Kf6+–) 34.Rg4 Ke6 35.d7 Rd7 36.Bd7 Kd7 37.Rf4 1–0. Fournier,Frederic (2025) – castizo (1790), Active, 2004.

4.Nf3 cb5 5.Bb5 Qb6 (5...a6 6.Be2+=) 6.a4 (6.Nc3 Qg6+=) 6...g6 (6...a6 7.Be2+=) 7.Bb2 Nf6 8.Bd4 Qd8 (8...Qe6 9.Nc3+=) 9.0–0 (9.Nc3 a6 10.Be2 Nc6+/–) 9...a6 10.Be2 (10.Bf6 ef6 11.Be2 d5+=) 10...Nc6 (10...Bg7 11.Na3 Nc6 12.Bf6 Bf6 13.d4+=) 11.Bb2 (11.Bf6 ef6 12.Nc3 d5+/–) 11...Bg7= 12.c4 0–0 13.d4 Qb6 14.Qc2 (14.Qd2 Ne4 15.Qc2 d6+=) 14...d5= 15.c5 Qc7 16.Nc3 Bf5 17.Qb3 e6 18.Nd2 Nd7 (better is 18...Rfb8 19.Rfc1 b6+=) 19.g4+/– Nd4 (better is 19...Be4 20.Nde4 de4 21.Ne4 b6 22.cb6 Nb6+/–) 20.ed4+– Bg4 (20...Qf4 21.gf5 Qd2 22.fe6 (22.Qb7?! Nc5 23.dc5 Rfb8+/–) 22...fe6 23.Qb7+–) 21.Nd5! (21.Nd5 ed5 22.Bg4+–) 1–0. Piszcz,Kazimierz – Nowakowski,Jozef, corr 1AMM Poland, 1991.

4.Nf3 Nf6 5.Bb2 e6 6.d4 (6.Be2 cb5 7.Bb5 a6=) 6...Bd6 (6...cb5!? 7.Nbd2 a6+=) 7.c4= 0–0 8.c5 Be7 9.Bd3 (9.Bc3 cb5 10.Bb5 Nc6=) 9...cb5+= 10.Bb5 a6 11.Bd3 Nc6 12.a3 b5 13.0–0 b4 (13...d6 14.Qc2=) 14.Nbd2 Bb7 15.Qb3 a5 16.ab4 ab4 (16...Nb4!? 17.Ba3 d6 18.Bb4 ab4 19.Qb4 Bf3 20.Nf3 dc5=) 17.Ra8 Qa8 18.Ra1 Na5 (better is 18...Qb8!?+/–) 19.Qb4+– Qc8?? (better is 19...Nc6 20.Qb3 Qb8+–) 20.Ra5 Bc6 21.Ne5 Nd5 22.Qa3 f6 23.Nc6 Qc6 24.Bb5 Qc8 25.Nc4 Nc7 26.Nb6 (better is 26.Ba4 Qd8+–) 26...Qb8 (26...Nb5 27.Qd3 Qb7 28.Rb5 d5+–) 27.Nd7 Qb5 (27...Qc8 28.Nf8 Nb5 29.Ng6 hg6 30.Rb5+–) 28.Rb5 Nb5 29.Qa5 Re8 30.Qb5 Kf7 31.c6 Bd8 32.Ba3 (32.Qh5 Ke7 33.Ba3) 32...Kg6 33.g4 f5 34.gf5 (34.Ne5 Kh6 35.c7 Rf8 36.Bf8 Bh4 37.c8Q Bf2 38.Kf2 Kg5 39.Qd8 Kh6 40.Qf6) 34...ef5 35.c7! Bc7 36.Qc6 Bd6 37.Qd6 Kg5 38.Nf8 (38.Qg3 Kh6 39.Nf8 Re4 40.f4 g6 41.Qh4 Kg7 42.Qh7 Kf6 43.Qg6) 38...Rf8 39.Qf8 g6 40.Be7 Kg4 41.Kg2 (41.Qa8 Kh5 42.Qg2 Kh6 43.Bf6 g5 44.Qg5) 41...g5 (41...Kh5 42.Qf6 Kh6 43.d5 f4 44.Qf4 Kg7 45.Qf8) 42.f3 (42.Qh6 f4 43.Qg5) 42...Kh4 (42...Kh5 43.Qf7 Kh4 44.Qh7) 43.Qh6 1–0. Fournier,Frederic – Chicot,Patricia, Partie Libre, 2007.

3.e3 d5

4.d4 b6 5.Nf3 Nh6 (5...Nc4 6.Nbd2 Nd6 7.Ne5+=) 6.Bd3 f5 (6...Ng4 7.0–0+=) 7.Ne5 g6 (7...Nf7 8.Nf7 Kf7 9.Qf3+/–) 8.0–0 (8.Bd2 Nf7+/–) 8...Qd6 (8...Bg7 9.Bd2+/–) 9.Bd2 Bg7 10.Ba5 ba5 11.f4 Be5 (11...a6 12.Qf3+/–) 12.fe5+– (< 12.de5 Qb6 13.Nc3 Qe3 14.Kh1 Bb7+=) 12...Qe6 13.Qf3 a6 (13...c6 14.bc6 Qc6 15.Nd2+–) 14.Nc3 0–0? (better is 14...Bb7+–) 15.Nd5 Ra7 16.c4 ab5 17.cb5 Qd7 (17...Bb7 18.Nf4 Qf7 19.Qg3+–) 18.Bc4 Kh8 19.Nf4 (better is 19.Qg3+–) 19...Bb7 (19...Qe8+–) 20.Qh3 Ng4 (20...Rb8 21.Qh6 Qe8+–) 21.Ng6 Kg7 22.Nf8 Kf8 23.Qh7 Bd5 24.Rf5 (24...Qf5 25.Qf5 Kg7 26.Qg4 Kh8 27.Bd5 e6 28.Qe6 Kg7 29.Qg8 Kh6 30.Bf7 Ra6 31.Qh8 Kg5 32.Qh5#) 1–0. byron_de – Kunk, ChessWorld.net, 2003.

4.d4 Bd7 5.a4 c6 6.Nf3 Nc4 7.Bc4 dc4 8.bc6 Bc6 9.0–0 e6 10.Ba3 Nf6 11.Bf8 Kf8 12.c3 b5 (12...Kg8!?=) 13.ab5+/– Bb5 14.Na3 a6 15.Nb5 ab5 16.Qc2 g6 (16...Kg8 17.e4+/–) 17.Qb2 Rb8 18.Rfb1 Kg7 19.Ne5 Qd6 20.Ra5 b4 (better is 20...Ne4!?+/–) 21.cb4 Rhc8 (21...Nd5 22.Ra7 Rhf8 23.b5+–) 22.Rc5 Rc5 23.dc5 Qa6?? (23...Qd5 24.Ng4 Qf5 25.Nf6 Qf6 26.Qc2+–) 24.Qc3 (better is 24.Nd7! Rc8 25.Qf6 Kh6 26.Qf7+–) 24...Nd5 25.Qc4 Rb4 26.Rb4 (26.Qb4 Nb4) 26...Qa1 27.Qf1 Qf1 28.Kf1 Nb4 29.c6 Na6 30.Ke2 Kf6 31.f4 Ke7 32.Nc4 (32.e4 Nc7+–) 32...Kd8 (32...Nb4 33.c7 Kd7 34.Nd6 Kc7 35.Nf7+–) 33.g4 Nb8 34.Ne5 f6 35.Nd7 (35.Nf7 Kc7 36.g5+=) 35...Nd7= 36.cd7 Kd7 37.h4 ½–½. Fournier,Frederic – Chalvet,Philippe, Partie amicale Gouvieux, 1994.

4.d4 Bd7 5.a4 Bf5 6.Bd3 (6.Nf3 Nf6=) 6...Bd3 (6...e6 7.Nf3=) 7.Qd3 Nf6 8.Nf3 e6 9.0–0 h5 (9...Bd6 10.Nbd2+=) 10.Ne5 (10.Nbd2 c5+=) 10...h4 11.Bd2 (better 11.h3=) 11...h3 (better 11...c5=) 12.Ba5+– b6? (12...hg2 13.Kg2 Ne4 14.Nf3+–) 13.Nc6 (better 13.Be1 hg2 14.Kg2 Ne4+–) 13...Qd6?? (better 13...Qd7 14.Bc3 hg2+–) 14.Bb4 Qd7 15.Ne5 Qc8 (15...Qd8 16.Bf8 Kf8 17.g3+–) 16.Bf8 hg2 (16...Kf8 17.g3 Kg8+–) 17.Bg7 Rg8 (17...gf1Q 18.Kf1 Rh2 19.Bf6 Rh6+–) 18.Bf6 gf1Q 19.Kf1 c5 20.Qh7 Rf8 21.Bg7 cd4 22.Bf8 Kf8 23.Qf7 1–0. GuestJKVR – GuestZKKK, freechess.org, 2020.

4.d4 Bd7 5.a4 Nf6 6.Nf3=.

4.Nf3 Nc4 =.

4.Nf3 c6 5.a4 Nf6 6.Be2 Bg4 7.0–0 a6 8.Nc3 ab5 9.ab5 cb5 (9...e6 10.Ra4=) 10.Bb5+= Nd7 (better 10...Bd7!?+=) 11.Nd5+– g6? (better 11...e6 12.Bd7 Kd7 13.Ne5 Ke8 14.Qg4 Qd5+–) 12.Bb2 f6 13.Bd4 Nc6 (13...Ra6 14.Ba6 ba6+–) 14.Ra8 Qa8 (14...Ndb8 15.Nb4 e5 16.Bc6 bc6 17.Nc6 Nc6 18.Rd8 Nd8 19.Bb6+–) 15.Nc7 Kf7 16.Bc4 (better 16.Na8!? Nd4 17.ed4 Bh6 18.Ng5 Bg5 19.Qg4 Ra8 20.Qd7 f5+–) 16...Kg7 17.Na8 Nd4 (17...e5 18.Bc3 e4 19.h3 Bf3 20.gf3+–) 18.ed4 Bf3 19.Qf3 e6 20.Qb7 Kf7 21.Qd7 Be7 22.Qe6 Ke8 (22...Kg7 23.Qe7 Kh6 24.Nc7 Rb8 25.Ne6 Rb7 26.Qf8 Rg7 27.Qf6 Re7 28.Qg5) 23.Rb1 h6 (23...Kd8 24.Rb8) 24.Rb8 1–0. GuestPJFV – GuestGJDQAs, freechess.org, 2019.

4.Nf3 Nf6 5.Bb2 (--> 1.b4 Nf6 2.Bb2 Nc6 3.b5 Na5 4.e3 d5 5.Nf3).

4.Nf3 Bg4 5.Be2 e6 6.0–0 Bd6 7.h3 Bf5 8.Nd4 Bg6 9.Bb2 c6?? (better is 9...Ne7!?=) 10.bc6?? (better is 10.Ne6 fe6 11.Bg7 Be5 12.Be5 Nf6+–) 10...Nc6?? (better is 10...Nf6 11.cb7 Nb7+/–) 11.Nc6+– bc6 (11...Qg5 12.Na5 (12.Bg7?! Be4 13.f3 Qg7+=) 12...0–0–0 13.f4+– (13.Bg7?! Be4 14.Bf3 Qg7=)) 12.Bg7 f6 13.Bh8 Qc7 (13...Kf7 14.h4 h6 15.h5+–) 14.Bh5 (14.Bd3 Kf7 15.Qf3 Qe7+–) 14...Bh5 (14...Qf7 15.Bg6 hg6 16.e4 de4 17.Nc3+–) 15.Qh5 Qf7 16.Qf7 (better is 16.Qh4 Qg6 17.f4 Kf7+–) 16...Kf7 17.d3 Nh6 18.Bf6! Kf6 19.Nc3 Nf5 20.Rab1 h5 21.e4 Nd4 22.ed5 (22.f4!? Bc7+–) 22...ed5 23.Na4 Nc2 24.Rb2 Na3 (24...Nd4 25.g3+–) 25.Nc3 (25.Rc1!? Rc8+–) 25...Be5 26.Rb3 Nc2 27.f4 Bd4 28.Kh2 Ne3 (28...Re8 29.g4+–) 29.Re1 Kf5 (29...Re8 30.Rc1+–) 30.g3 Rg8 (30...Re8 31.Nd1 h4 32.Ne3 Be3 33.g4 Kf4 34.Kg2+–) 31.Nd1 (better is 31.Ne2 Bf6 32.g4 hg4 33.Ng3 Kf4 34.Nh5 Kf3 35.Nf6+–) 31...Nd1 32.Rd1 Bf2 (32...Re8 33.Rd2+–) 33.d4 h4? (better is 33...Ke4+–) 34.g4 Kf6 (34...Ke4 35.Rb7 Bg3 36.Kg2 Kf4 37.Ra7+–) 35.Rf3 White intends f5 (35.Kg2!? Bg3 36.Kf3 Rc8+–) 35...Bg3 36.Kh1 Re8 37.f5 Re2 38.g5! Kg5 39.f6 Bd6 (39...Rh2 40.Kg1 Ra2 41.f7+–) 40.Rg1 (40.Rg1 Kh6 41.Rg8 Ra2 42.f7 Ra1 43.Kg2 Ra2 44.Kf1+–) 1–0. Valpa – Tusnelda, playchess.de, 2006.

3.e3 e5

4.Bb2 Nc4 5.Bc4 d5 6.Be2 Qd6 7.Ba3 c5 8.bc6 Qc6 9.Bf8 d4 10.Bg7 Qg2 11.Bf3 Qg7 12.d3 de3 13.fe3 e4 14.d4 Nf6 15.Nd2 ef3 16.Qf3 Bg4 17.Qg3 0–0 18.h3 Bh5 19.Qg7 Kg7 20.Ngf3 Rfe8 21.Rg1 Kf8 22.Kf2 Rac8 23.c4 Rc7 24.Rg5 Bg6 25.Ne5 Bd3 26.Nd3 Rce7 27.Re5 Nd7 28.Re7 Re7 29.Ne5 Ne5 30.de5 Re5 31.Rb1 b6 32.Nf3 Rh5 33.h4 Kg7 34.Rd1 Ra5 35.Rd2 Ra4 36.Rc2 Kf6 37.Kg3 Kg6 38.e4 Kh5 39.Ne5 f6 40.Ng4 b5 41.Nf6 Kg6 42.Nd7 Ra3 43.Kg4 h5 44.Kf4 bc4 45.Ne5 Kf6 46.Nc4 Ra6 47.e5 Kg6 48.a3 Ra5 49.Na5 (49...Kf7 50.Rc7 Kg6 51.e6 Kf6 52.e7 Kf7 53.Nc4 a6 54.Nd6 Kf6 55.e8Q a5 56.Qf7#) 1–0. tanto – saanonse, net–chess.com, 2000.

4.Bb2 d6 (--> 1.b4 e5 2.Bb2 d6 3.e3 Nc6 4.b5 Na5).

4.Bb2 Qe7 5.Nf3 e4 6.Nd4 Qe5 (6...c5 7.bc6 dc6 8.Bc3=) 7.d3 (7.Bc3 b6+/–) 7...c5 8.Qd2?? (better is 8.bc6 Nc6 9.Bc3 Nd4 10.de4 (< 10.ed4 Qe7=) 10...Nc2 11.Qc2+=) 8...b6–/+ (< 8...cd4 9.Qa5 ed3 10.cd3+=) 9.c4 (better is 9.de4 cd4 10.Qd4–/+) 9...Bb7?? (better is 9...cd4 10.Bd4 Qe6–/+) 10.Nc6+/– Qd6 11.Na5+– ba5 12.d4 Ne7 13.d5 Nc8 14.Be2 Nb6 15.Qc2 Qg6 16.0–0 Bd6 17.Nd2 Qh6 18.h3 0–0–0? 19.Ne4+– Bf8 20.Nd2 Re8 21.a4 Na8 22.Nb3 Kd8 23.Na5 Bc8 24.Bf3 Bd6 25.Nb3 Bc7 26.Nc5 Qd6 27.g3 Qc5 28.Bd4 Qb4 29.Rfb1 Qa5 30.d6 Bd6 31.Ba8 Qc7 32.Bg2 a5 33.c5 Be7 34.b6 Qb8 35.b7 h5 36.bc8Q Qc8 37.c6 Bd6 38.Bb6 Ke7 39.Bc5 Rh6 40.Bd6 Rd6 41.Qe4 Re6 42.Qh4 Rf6 43.Qh5 Qa6 44.cd7 g6 45.de8Q Ke8 46.Rb8 Ke7 47.Qh8 Rf5 48.Qd8 Ke6+– 49.Rb6 (49...Qb6 50.Qb6 Ke7 51.Rc1 Rd5 52.Bd5 Kf8 53.Qf6 Ke8 54.Rc8 Kd7 55.Qd8) 1–0. phildo – cawander, net–chess.com, 2003.

4.Bb2 Qf6 5.Nf3 (5.Bc3 b6+/–) 5...Bd6+= 6.Bc3 (6.Bd3 Ne7+=) 6...b6 7.d3 (7.d4 e4 8.Ne5 Bb7+=) 7...Nh6 (7...a6 8.d4 e4 9.d5=) 8.Qd2 (8.Nbd2 Bb7+=) 8...0–0 9.Ba5 (9.Be2 a6 10.a4 Bb7=) 9...ba5 10.Qa5 (10.Nc3 Bb7 11.Ne4 Be4 12.de4 Qg6=) 10...e4 11.Nd4 (11.Nd4 ed3 12.Bd3+=). michas – alabantin, internet, 2007.

4.c4 b6 5.a4 d6 (5...Bb7 6.Nf3 e4 7.Nd4=+) 6.d4 ed4 7.ed4 Qe7 8.Be3 Nf6 9.h3 (9.Nf3 a6=) 9...g6 (9...d5 10.Nd2=+) 10.g4 (10.Nf3 Bh6 11.Ra3 d5=) 10...Bh6 11.Qc1?? (11.Ra3 0–0=) 11...Be3?? (better 11...Bb7 12.d5 Nb3–+) 12.Qe3= (12.fe3? Bb7 13.Rh2 Nb3–+) 12...Qe3 13.fe3 Ne4 (better 13...Bb7 14.Rh2 h5 15.gh5 Rh5=) 14.Ne2 (better 14.Bg2 Bb7 15.Nd2+=) 14...Nc4–/+ 15.Bg2 Bb7 16.0–0 (16.Nbc3 f5 17.gf5 gf5 18.Ne4 fe4 19.Kf2 Rf8 20.Nf4=+) 16...0–0–0 (better 16...Ne3!? 17.Rc1 Ng2 18.Rc7 Bd5 19.Kg2 Kd8–+) 17.Be4=+ Ne3?? (better 17...Be4 18.Rf7 Bd5=+) 18.Bb7+– Kb7 19.Rf7 Rde8 (19...Rhf8 20.Rf8 Rf8+–) 20.Nf4 (better 20.Nbc3+–) 20...Nc2 21.Nd5?? (better 21.Ra2 Nd4 22.Ng2+–) 21...Re1?? (21...Na1 22.Nbc3 Re1 23.Kf2 Rc1 24.Nc7 Rc2 25.Kg1 Kc8=) 22.Kf2+– Rhe8 (22...Rc1 23.Rc7 Kb8+–) 23.Rc7 Kb8 24.Re7 (better 24.Rc2 Rh1 25.Rc6 Rf8 26.Kg3+–) 24...R8e7 (24...R1e7 25.Ne7 Na1 26.Nc6 Kb7 27.Nd2–/+) 25.Ne7 Re7 26.Ra2 Nd4 (26...Rf7 27.Kg2 Ne1 28.Kg3 Rf3 29.Kh2=+) 27.Nc3 (27.Rd2 Rf7 28.Ke3 Ne6=) 27...Re5 (27...Nb3 28.Nd5 Rf7 29.Ke3–/+) 28.Rd2= Nb3 (28...Rc5!?=) 29.Rd6+= Nc5 30.Rd8 Kc7 31.Ra8 Kb7 32.Rh8 h5 (32...Re7 33.g5+=) 33.gh5 (33.Rh7 Kb8+=) 33...gh5 34.Rh7 Ka8 35.Rh8 (35.Kf3 a6+=) 35...Kb7 36.Rh7 Kb8 (36...Ka8 37.Kf3+=) 37.Rh8 (37.Kf3 Nd3+=) 37...Kc7 (37...Kb7 38.Kf3+=) 38.Rh7 Nd7 (38...Kb8 39.Kf3+=) 39.Ne2 (39.Kf3 Kd6+=) 39...Rf5 (39...Re4 40.Rh5 Ra4 41.Rh6=) 40.Kg3 Kd6 41.Rh6 (41.Nd4 Rf1+–) 41...Kc5 42.Nf4 (42.Kh4 Kb4=) 42...Kb4 43.Rh5? (better 43.Rh7!? Nc5 44.Nh5 (worse 44.Rh5 Rh5 45.Nh5 Ka4–/+) 44...Ne4 45.Kh4 Ka4 46.Kg4 Rb5 47.Ra7 Ra5 48.Ra5 ba5 49.Kf5 Nd6 50.Ke6=) 43...Rh5–/+ 44.Nh5 Ka4 45.Nf4 Kb5 46.h4 Nf6 47.h5? (better 47.Ne2–+) 47...Nh5 48.Nh5 a5 49.Nf4 Kc4 50.Nd3 (50.Ng2 a4 51.Ne3 Kb3–+) 50...b5 (better 50...Kd3 51.Kf4–+) 51.Kf2 (51.Nb2 Kc3 52.Nd1 Kd2 53.Nf2–+) 51...Kd3 52.Ke1 b4 53.Kd1 a4 54.Kc1 Kc3 55.Kb1 (55.Kd1 b3 56.Ke1 b2 57.Kd1 Kd3 58.Ke1 Ke3 59.Kf1 b1Q 60.Kg2 Qg6 61.Kh3 Kf3 62.Kh4 Qg4) 55...a3 (55...b3 56.Kc1 b2 57.Kd1 Kd3 58.Ke1 Ke3 59.Kf1 b1Q 60.Kg2 Qg6 61.Kf1 a3 62.Ke1 Qb1) 56.Ka2 Kc4 (56...b3 57.Ka3 b2 58.Ka4 b1Q 59.Ka5 Qb7 60.Ka4 Qb4) 57.Ka1 (57.Kb1 b3 58.Ka1 Kc3 59.Kb1 b2 60.Ka2 Kc2 61.Ka3 b1Q 62.Ka4 Qb6 63.Ka3 Qb3) 57...b3–+ 58.Kb1 Kc3 Black plans b2 (58...Kd3 59.Ka1 b2 60.Ka2 Kc2 61.Ka3 b1Q 62.Ka4 Qb6 63.Ka3 Qb3) 59.Ka1 (59.Kc1 a2 60.Kd1 a1Q 61.Ke2 Qa6 62.Ke1 b2 63.Kf2 Qf6 64.Kg3 b1Q 65.Kh2 Qf4 66.Kh3 Qbf1) 59...b2 60.Kb1 (60.Ka2 Kc2 61.Ka3 b1Q 62.Ka4 Qb6 63.Ka3 Qb3) 60...a2! 61.Ka2 (61.Ka2 Kc2 Mate attack) 61...Kc2 62.Ka3 b1Q 63.Ka4 Kc3 (63...Qb6 64.Ka3 Qb3) 64.Ka5 Kc4 (64...Qb7 65.Ka4 Qb4) 65.Ka6 Kc5 66.Ka7 Kc6 67.Ka8 (67.Ka6 Qb6) 67...Kc7 (67...Qb7) 68.Ka7 Qa1 (68...Qb7) 0–1. afsharian – Albanos, lichess.org, 2018.

4.d3 d5 5.Bd2 c6 6.bc6 (6.c4 cb5 7.cb5 Bd6=) 6...bc6 (6...Nc6 7.Nf3=+) 7.Be2 (7.c4 Ne7=) 7...Nf6 8.Nf3 Bd6 9.0–0 (9.c4 dc4 10.Qa4 Bc7 11.Ne5 cd3 12.Nd3 Ba6=) 9...Nb7 10.Bc3 Qe7 (10...Qc7 11.Nbd2=+) 11.h3 (11.Nbd2 0–0=) 11...0–0 12.Nbd2 Nc5 (12...Rb8 13.Rb1=+) 13.a4 (13.Be5 Be5 14.d4 Bd6 15.dc5 Bc5=+) 13...a5 (13...e4 14.Nd4 Qe5 15.f4 ef3 16.Rf3 Qh2 17.Kf2–/+) 14.d4 ed4 15.Bd4 h6 (15...Rb8 16.c4=+) 16.Bc5 (16.c4 Ne6=) 16...Bc5=+ 17.Nd4 Bd7 18.c3 (18.Bd3 Rfb8=+) 18...Ne4 19.Ne4 Qe4 (19...de4 20.Bg4=+) 20.Bd3 Qe5 21.Qc2 Bd6–/+ 22.Nf3 Qf6 23.Rfe1 Rfe8 24.Nd4 Be5 25.f4 Bd4 26.cd4= Rab8 27.Rab1 g6 28.Qd2 Ra8 29.Kh2 Qh4 30.Rf1 Qh5 31.f5 Qg5 32.Rf3+/– (32...Qf6 33.fg6 Qd6 34.Rg3+–) 1–0. 1805DYDIDIDY – Charli@, mySchach.de, 2005.

4.d4 ed4 5.ed4 d5 6.Nf3 Bd6 7.Bd2 c6 8.a4 Nf6 9.h3 cb5 10.ab5 Ne4?? (better is 10...Qe7 11.Qe2 Nc4 12.Qe7 Ke7 13.Bc4 dc4=) 11.Ba5+– (< 11.Ra5 Nd2 12.Ra1 Nf1 13.Qe2 Be6 14.Qf1 0–0–/+) 11...b6 12.Bd2 0–0 13.Bd3 Re8 14.0–0 Bf5 15.Nc3 Qd7 (15...Nc3 16.Bc3 Be4+–) 16.Ne4 (better is 16.Nd5 Nd2 17.Qd2+– (< 17.Nd2 Bd3 18.cd3 Bh2 19.Kh2 Qd5+–)) 16...de4+/– 17.Bc4 ef3 18.Qf3 Rac8 19.Bd3 Bg6 20.Bg6 hg6 21.Qd3 Be7 22.Rfe1 Bf6 23.Re8 Re8 24.Bc3 Rd8 25.Bb2 Bd4? (better is 25...Qd5+–) 26.Rd1 1–0. byron_de – chessH, ChessWorld.net, 2003.

4.Nf3 e4+= 5.Nd4 c5 6.Nf5?? (6.bc6 dc6 7.Bb2 Nf6=) 6...d5?? (better is 6...Qf6 7.Ng7 Bg7–+) 7.Ng3+= d4 (better is 7...Nf6!?+=) 8.Ne4+= f5 9.Ng3 a6 (9...de3 10.de3 Be6 11.Bd2+/–) 10.Be2 Nf6 11.0–0 ab5 12.Bb5 Bd7 13.Bd7 Qd7 14.Qf3 Nc4? (14...d3 15.Bb2 dc2 16.Na3+/–) 15.Nf5 (15.ed4 f4 16.Nh5 Qd4 17.Qb7 Ra5 18.Re1 Kd8 19.Qb8 Kd7 20.Nf6 Qf6+–) 15...Ne5 (better is 15...d3+/–) 16.Qe2?? (better is 16.Qh3!? Neg4 17.Ng3+/–) 16...Qf5?? (16...d3 17.cd3 Qf5 18.d4–/+) 17.Qb5?? (better is 17.ed4!? cd4 18.f4+=) 17...Kd8 (better is 17...Qd7 18.Qb2 Ra5–+) 18.Qb7 Ra4 (18...Qc8!? 19.Qc8 Kc8+=) 19.Qb6+= Kc8? (19...Ke7 20.Qc5 Kf7 21.Qc7 Be7 22.ed4 Rd4 23.Bb2=) 20.Ba3 (better is 20.f4 Rb4 A) 21.fe5?! Qf1 (21...Rb6? 22.Rf5 Nd7 23.ed4+–) 22.Kf1 Rb6 23.ef6 Rf6 24.Kg1 Bd6+=; B) 21.Qa6 Kd8 22.fe5 Qe5 23.c3+–) 20...de3= (20...Qc2? 21.Rc1 Qd3 22.Rc5 Bc5 23.Qc5 Kd7 24.Qe7 Kc8 25.Qe5+/–) 21.fe3 (21.Bc5? e2 22.Re1 Nfd7–+) 21...Qc2 22.Rc1 Qg6?? (better is 22...Nfd7 23.Qb5 Qe4 24.Bc5 Bc5 25.Rc5 Nc5 26.Qc5 Qc6 27.Qc6 Nc6–+) 23.Bc5+– (worse is 23.Rc5 Bc5 24.Qc5 Kd8 25.Qe5 Nd7 26.Qe7 Kc8+–) 23...Ne4 (23...Rc4 24.Qa6 Kd8 25.Rc4 Nc4 26.Qa8 Kd7 27.Bf8+–) 24.Bf8 (better is 24.Bd6 Kd7 25.Rc7 Ke6 26.Bf8 Kf5 27.Qb5 Rf8 28.Qf1 (28.Qa4?! Nf3 29.Kf1 Nh2 30.Kg1 Nf3 31.Kf1 Nh2 32.Kg1 Nf3 33.Kf1 Nh2=) 28...Ke6 29.Qf8+–) 24...Kd7 (24...Rc4 25.Rc4 Nc4 26.Qg6 hg6 27.Bg7+–) 25.Qb5 (25.Rc7 Ke8 26.Qb8) 25...Qc6 (25...Ke6 26.Rf1 Rf8 27.Rf8 Rc4+–) 26.Rc6 Nc6 27.Qa4 Ng5 28.Bg7 Rg8 29.Bh6 (29.Qb3 Ne6 30.Bf6 Re8 31.Qd3 Kc8+–) 29...Nf3 30.Kh1 Nfe5 31.d4 Nd3 32.d5 Rg6 33.dc6 Kc7 34.Bf4 (better is 34.Nc3 Nf2 35.Kg1 Nh3 36.Kf1 Rh6 37.Nd5 Kd6+–) 34...Kd8 35.Qd4 1–0. Neumann,Frank (1650) – Dammer,Dennis (1605), remoteschach.de, 2008.

4.Nf3 e4 5.Ne5 =+.

3.e3 e6

4.Bb2 Nf6 (--> 1.b4 Nf6 2.Bb2 Nc6 3.b5 Na5 4.e3 e6).

4.Nf3 Qf6 (4...d5 5.d4=) 5.d4+= c5 (5...a6 6.Nbd2+=) 6.Bb2+– Bd6 (6...d5 7.Bc3 Qd8 8.Qd2+=) 7.Be2 (7.Bc3 cd4 8.Qd4 Qd4 9.Nd4 e5+–) 7...Ne7 (7...Bc7 8.Bc3 cd4 9.Bd4+=) 8.e4 (8.Bc3 cd4 9.Ba5 de3+–) 8...Bc7 (8...cd4 9.Bd4 e5 10.Be3+–) 9.0–0 (9.e5 Qf4+–) 9...0–0 (9...cd4!? 10.Bd4 e5+=) 10.e5+– Qg6 11.dc5 Nd5 12.Bd3 Qg4 (12...f5 13.ef6 Qh5 14.Re1 gf6 15.Nbd2+–) 13.h3 Qb4 (13...Qa4 14.Nc3 Nc3 15.Bc3+–) 14.Ba3 Qf4 15.g3 Qh6 16.c4 Ne7 (16...Ne3 17.fe3 Be5 18.Bh7 Kh8 19.Ne5 Qe3 20.Kh1 Qe5+–) 17.c6 dc6 (17...Nec6 18.bc6 Rd8 19.Kg2+–) 18.Be7 Re8 19.Bb4 (better 19.Bh4+–) 19...Qh3 (19...cb5 20.cb5 Rd8+–) 20.Ng5 Qh6 21.Bh7 Kh8 (21...Qh7 22.Nh7 Kh7 23.Qh5 Kg8 24.Kg2 Rd8 25.Rh1 f6 26.ef6 Bd6 27.Qg6 Rd7 28.Qe8 Bf8 29.Qf8) 22.Nf7 (22.Nf7 Kh7 23.Nh6 gh6 24.Qe1 Nc4 25.Qe4 Kg7 26.Qg4 Kf7 27.Qh5 Kg7 28.Qe8 Be5 29.Bf8 Kf6 30.Rd1+–) 1–0. DEFFM – giusmo, freechess.org, 2018.

3.e3 Nf6

4.Bb2 (--> 1.b4 Nf6 2.Bb2 Nc6 3.b5 Na5 4.e3).

4.c4 a6 5.ba6 b6 6.Nf3=.

4.c4 e5 5.Bb2 Nc4? 6.Bc4+– d5 7.Bb3 e4 8.Ne2 b6? (8...a6 9.ba6 Ra6 10.d3 Bb4 11.Bc3+–) 9.Nd4 (better 9.Bf6 gf6 10.Nf4+–) 9...Rb8?? (9...a6+–) 10.Nc6 Qe7 (10...Qd6 11.Ba3 Qe6 12.Bf8+–) 11.Nb8 (better 11.Ne7 Be7 12.Qc2+–) 11...Qd7 (11...Bb7 12.Qc2 Qc5 13.d3+–) 12.Nc6 (better 12.Nd7 Nd7 13.Bd5 Nc5+–) 12...h5 (12...Be7 13.Bf6 Bf6 14.Nc3+–) 13.0–0 (13.Bf6 gf6 14.Nc3 a6+–) 13...h4 (13...a6 14.Bf6 gf6 15.Nc3+–) 14.h3 (better 14.Bf6 gf6 15.Nc3 a6+–) 14...g5 (14...a6 15.Bf6 ab5+–) 15.Bf6 Rh7 16.Nc3 Bg7 17.Nd5 (better 17.Bg7 Rg7 18.Nd5 Qd6+–) 17...Qd5 18.Bd5 Bf6 19.Be4 Rh6 20.Na7 Bb7 21.Bb7 Ba1 22.Bc6 Ke7 23.Qa1 f5 24.Qe5 (24.Qg7 Ke6 25.Bd7 Kd6 26.Nc8 Kd5 27.Qd4) 24...Kf7 25.Qf5 (25.Bd5 Re6 26.Qe6 Kg7 27.Qg8 Kh6 28.Bf7 c5 29.Qg6) 25...Kg7 26.Qg5 Kh7 (26...Rg6 27.Qe7 Kg8 28.Rc1 Rh6 29.Bd5 Re6 30.Rc7 Kh8 31.Qf8) 27.Be4 Kh8 (27...Rg6 28.Qg6 Kh8 29.Qh7) 28.Qh6 Kg8 29.Qf6 (29.Bd5) 29...c5 (29...c6 30.Nc8 cb5 31.Ne7) 30.Bg6 (30.Nc6 c4 31.Ne7) 30...c4 31.Qf7 Kh8 32.Qh7 (32.Qf8) 1–0. GuestSKYR – GuestPFBJ, freechess.org, 2017.

4.c4 e5 5.Bb2 Bd6 6.Bc3 (6.Nc3 0–0 7.Qc2 Re8 8.Nf3 b6 9.Be2 Bb7) 6...c6 (6...b6 7.Nf3 e4 8.Nd4 0–0 9.Be2 c5) 7.d4= (7.Qa4 Bc7 8.Bb4 d6 9.Nc3 0–0) 7...e4 8.Nd2 0–0 9.Nh3 Bc7.

4.c4 e5 5.Bb2 e4 6.Nc3 (6.Qc2 a6 7.ba6 ba6 (7...Nc6 8.Bf6 Qf6 9.Qe4 Qe7) 8.Bf6 Qf6 9.Qe4 Kd8+=) 6...Be7 (6...a6!?= 7.Qb1 Qe7 8.Nh3 ab5 9.cb5 d5) 7.Qc2+– d5 (7...a6 8.ba6 (8.Ne4 ab5 9.cb5 Ne4) 8...Ra6 9.Ne4 0–0+= (9...Ne4 10.Qe4+–); 7...0–0 8.Ne4 Re8 9.Nf3 Ne4) 8.cd5 (8.Nd5 Nd5 9.cd5 Qd5) 8...Nd5 (8...0–0 9.Qa4 b6) 9.Nd5 (9.Qa4 c6) 9...Qd5 10.Bg7 (10.Bc3 b6 11.Ne2 0–0 12.Ba5 ba5+–) 10...Rg8 11.Bd4 c5 12.bc6 (12.Bc3 Nc4+–) 12...Nc6+= 13.Bb2 (better 13.Bc3!?+=) 13...Nb4=+ 14.Qb1 (14.Qd1 Bd7=+) 14...Bf5 (better 14...Nd3 15.Bd3 ed3–+ (15...Qd3?! 16.Qd3 ed3 17.Kf1=)) 15.a3? (better 15.Nh3 Bd6 16.Ba3–/+) 15...Nd3–+ 16.Bd3 Qd3?? (better 16...ed3 17.Nf3 Rg2–+) 17.Qd3= ed3 18.g3 (18.Kf1 Rc8 19.Nf3 Be6=) 18...Rc8 19.f3 Kd7 (19...Be6 20.Bd4=) 20.Bd4 b6 21.e4 (21.Kf2 Rc4=) 21...Be6 (21...Rc4 22.ef5 Rd4=+) 22.f4 (better 22.Kf2!?+=) 22...f5=+ 23.Nf3 fe4 24.Ne5 Ke8 (24...Kd6 25.Kf2=+) 25.Kf2 Rc2 (25...Bd5 26.Ke3=+) 26.Ke3= Bd5 27.Rhb1 Bd6 28.a4 Ke7 (28...Be5 29.Be5 Bc6 30.a5+=) 29.a5+= Bc5?? (better 29...Bc7 30.ab6 ab6+=) 30.ab6+– ab6 (30...Bd4 31.Kd4 Ba2 32.ba7 Bb1 33.Rb1 Rd2 34.Rb7 Ke6 35.Rb6 Ke7 36.Nc6 Kf7 37.Ke4 Re8 38.Ne5 Kf8 39.Rb7+–) 31.Ra7 (31.Bc5!? Rc5 32.Ra7 Kd8+–) 31...Kd6 32.Bc5 (32.Rd7 Ke6 33.f5 Kf5 34.Rd5 Ke6 35.Ke4 Rd2 36.Bc5 Re2 37.Be3 Re3 38.Kd4 Rb8+–) 32...bc5 (32...Kc5 33.Nd7 Kd6 34.Rb6 Rc6 35.Rc6 Kc6 36.Ne5 Kc5 37.Rh7 Re8+–) 33.Rb6 (33.Rb6 Bc6 34.Rc6 Kd5 35.Rd7) 1–0. Palacios Sanchez,Gabriel (1940) – Cuxart Taltavull,A (1605), 29th Internacional Vila de Sant Boi – M, 2017.

4.Nf3 d5 5.Be2 c6 6.a4 cb5 7.ab5+= b6 (7...g6 8.d3+=) 8.Ba3 Bd7 (8...g6 9.Nc3+–) 9.0–0 g6 10.Ne5 Qc7 (10...Be6 11.f4+–) 11.d4 (11.f4 Be6+–) 11...Bh6 (11...Be6 12.Nd2+–) 12.c4 (12.Bb4 Be6+–) 12...dc4 (12...Nc4 13.Bc4 dc4 14.Nc3+=) 13.Qa4 Qd6?? (better 13...Be6 14.Rc1 0–0 15.Nc4 Nc4+=) 14.Bd6+– (14.Bd6 ed6 15.Nd7 Nd7 16.Bc4+–) 1–0. guest8 – guest580, chessclub.com, 2019.

3.e4 a6

4.d4 d5 5.e5 (5.ed5 Qd5 6.ba6 ba6+=) 5...c6 6.ba6 ba6 (6...b6 7.Nf3+=) 7.Nf3 h6 (7...Qc7 8.Be2+=) 8.Bd3+/– Qd7 (8...c5 9.dc5 Nc6 10.c4 Qa5 11.Bd2 Qc5 12.cd5 Qd5 13.Qe2+=) 9.Bd2 (better is 9.0–0+/–) 9...Qg4?? (better is 9...Qc7+/–) 10.h3+– (worse is 10.Ba5 Qg2 11.Rg1 Qh3+–) 10...Qg2 (10...Qh5 11.Ba5 Bf5 12.c4 Bd3 13.Qd3+–) 11.Rh2 (11.Rh2 Qh2 12.Nh2+–) 1–0. Wall,Bill – VikeKing, internet, 1999.

4.Nf3 ab5 5.Bb5 c6 6.Be2 Nf6 7.e5 Ng4 (7...Nd5 8.d4+=) 8.0–0 (8.h3 Nh6+=) 8...d6+= 9.d4 de5 10.de5 (10.Ne5?! Ne5 11.de5 Bf5=) 10...Qd1 11.Rd1 Bf5 12.Nd4 (12.Na3 Be4 13.e6 Bf3 14.Bf3 Ne5+=) 12...Bc8? (better is 12...e6!? 13.Bf4 Bc5+=) 13.Na3 (13.Nc3 Ne5 14.Ndb5 cb5 15.Nb5 f6 16.Nc7 Kf7 17.Na8 Nec6+–). pcmvr (2225) – bogdans (2055), net–chess.com, 2006.

4.Nf3 d5 5.d4 de4 6.Ne5 Nf6 7.ba6 ba6 8.c3 Ng4?? (better is 8...Nb7=) 9.Ng4+– Bg4 10.Qg4 Qd5 11.Ba6 Ra6 (11...f5 12.Qh5 g6+–) 12.Qc8 Qd8 13.Qa6 c6 14.Nd2 f5 15.Nb3 Nb3 16.Qc6 Qd7 17.Qd7 Kf7 (17...Kd7 18.ab3 e5+–) 18.Qf5 1–0. PassedPawn – Kunk, ChessWorld.net, 2003.

3.e4 b6

4.Bb2 a6 5.Nc3 +=.

4.Bb2 Bb7 5.Nc3 g6 6.Bd3 Bg7 7.Nf3 Nf6 8.Qe2 c6 9.0–0 cb5 10.Nb5 0–0 11.h3 Nh5 12.Bg7 Ng7 13.Qe3 a6 14.Nbd4 Ne6 (14...Qc7!?+/–) 15.Ne6 de6 16.Rfb1 b5 17.a4 Rb8 (better is 17...Qc7!?+/–) 18.ab5+– ab5 19.Rb5 Nc6 20.Rab1 Ba6 21.Rb8 Nb8 22.Ba6 Na6 23.Rb7 Qd6? (23...Re8+–) 24.Rb6 Qa3 (24...Qc7 25.Ra6 Qc2+–) 25.Qa3 Nc7 26.Qe7 Nd5 27.ed5 ed5 (27...Kg7 28.de6 h5 29.Ne5 Rg8 30.ef7 Rf8 31.Rg6 Kh7 32.Qf8 h4 33.Rh6) 28.Rd6 d4 (28...Re8 29.Qe8 Kg7 30.Rd7 Kh6 31.Qf7 Kh5 32.Qh7) 29.Ne5 d3 (29...Ra8 30.Qf7 Kh8 31.Rg6 Ra1 32.Kh2 Rh1 33.Kh1 hg6 34.Ng6) 30.Rd8 Rd8 31.Qf7 Kh8 32.Nc6 Rg8 33.Ne7 Rg7 34.Qe8 Rg8 35.Qg8 1–0. usingprogram (2080) – junior40, kurnik, 2011.

4.Bb2 d6 5.Nf3+= e5 (5...Bb7 6.Bd3+=) 6.d4 Nf6 7.Bd3 (7.de5 Ne4 8.Bd3 Nc5+=) 7...Bb7 (7...ed4 8.Bd4 a6 9.0–0+=) 8.de5 (8.Qe2 ed4 9.Nd4 Be7+/–) 8...Ne4+= 9.Be4 (9.0–0 d5+=) 9...Be4 10.Nbd2 Bf3 (10...d5 11.Ne4 de4 12.Qd8 Rd8 13.Nd2=) 11.Nf3 (better is 11.Qf3 d5 12.c4+=) 11...g6? (better is 11...d5=) 12.ed6+– f6 (12...Rg8 13.Qe2 Kd7 14.Ne5 Kc8 15.Qe4+–) 13.dc7 (13.Qe2 Kd7 14.Ng5 Qe8+–) 13...Qe7 (13...Qc7 14.Qe2 Be7 15.Bf6+–) 14.Qe2 (14.Kf1 Qc7 15.Bf6 Rg8+–) 14...Kd7 (14...Qe2 15.Ke2 Be7 16.Rhe1+–) 15.Qe7 (15.0–0–0!? Kc7 16.Qd2 Qe8+–) 15...Be7 16.0–0 (16.0–0–0 Kc7 17.Rhe1 Rhe8+–) 16...Rac8 (16...Nc4!? 17.Bc3 Rhe8+/–) 17.Rad1+– Kc7 18.Rfe1 Rhe8 19.Re6 f5?? (19...Nc4 20.Bf6 Bd6 21.Re8 Re8 22.Kf1+–) 20.Rd3 (better is 20.Be5 Kb7 21.Rd7 Ka8 22.Ree7 Re7 23.Re7+–) 20...Kb8 (20...Rcd8 21.Be5 Kc8 22.Bc3+–) 21.Be5 Ka8 22.Rc3 (better is 22.Rd7 Bb4 23.Re8 Re8 24.Rh7+–) 22...Rc3?? (better is 22...Bc5 23.Re8 Re8+/–) 23.Bc3+– Nc4 (23...Nb7 24.Bf6 Nd6 25.Re7 (25.Be7?! Nc8+–) 25...Re7 26.Be7 Nb5 27.Ng5+–) 24.Nd4 (24.Bb4 Bb4 25.Re8 Kb7+–) 24...Nd6 (24...Na3 25.Be1 Kb7+–) 25.Nc6 (better is 25.Bb4 Nc8 26.Nc6+–) 25...Bh4?? (better is 25...Bf8 26.Re8 Ne8+/–) 26.Rd6+– Be7 (26...Kb7 27.Rd7 Kc8 28.Ra7+–) 27.Re6 (27.Rd7 a6 28.Ra7) 27...Kb7+– 28.Re7 (28.Re7 Re7 29.Ne7+–) 1–0. Trkn – ROBRICH@WORKMAIL, itsyourturn.com, 2000.

4.Bb2 e6 5.d4 Bb7 6.Nd2 =.

4.Bb2 e6 5.d4 d5 6.ed5 ed5 7.Nf3 Bg4 8.Be2 Nf6 9.Ne5 Be2 10.Qe2 Ne4 (10...Bb4!? 11.Bc3 Bc3 12.Nc3 0–0=) 11.0–0 Qf6? (11...Be7!?+/–) 12.c4 (12.f3 Nd6 13.Ng6 Kd7 14.Nh8 Nac4+–) 12...Nc4? (better is 12...0–0–0+–) 13.Nc4 0–0–0 14.Ne5 Kb7 (14...Bd6 15.Nd2 Nd2 16.Qd2+–) 15.f3 (15.Qc2 Kc8+–) 15...Ng5 16.f4 Ne4 17.Nd2 Nd2 18.Qd2 h5 (18...Bd6 19.Qc1+–) 19.Qc2 h4 (19...Bd6 20.Qc6 Kb8 21.Nd7 Rd7 22.Qd7+–) 20.Qa4 Ra8 (20...a5 21.ba6 Kc8+–) 21.Qa6 Kb8 22.Nd7 1–0. pierred (2800) – valerypavlovich (2210), net–chess.com, 2016.

4.Bb2 e6 5.d4 Nf6 6.Nd2 (6.e5 Ne4+=) 6...Bb7= 7.Bd3 g6 (7...a6 8.a4=) 8.Ne2 (8.Ngf3 a6+=) 8...Bh6 (8...a6 9.c4+=) 9.Ng3 (9.Ng3 a6 10.c4+=; 9.e5 Nh5 10.Ne4 f5 11.ef6 Nf6+=). Roldan,Antonio – Paton,Alan, IECG, 1998.

4.Bb2 e6 5.Nf3 a6 +=.

4.d4 Bb7 5.Nd2 Nf6 6.e5 Ne4 7.Ne4 Be4 8.Nf3 e6 9.c3 Bd5 10.Bg5 Be7 11.Be7 Qe7 12.Bd3 Bc4 (12...Nc4 13.Rb1=) 13.0–0 (13.Bc4 Nc4 14.Qe2 d5 15.ed6 Nd6+=) 13...Bd5 (13...d5 14.Qc2+=) 14.Re1 0–0 15.Qe2 Bf3 16.Qf3 Nb7?? (better is 16...f5+/–) 17.Qb7+– Qd8 18.Be4 c6 (18...Rc8 19.Qa7 d5 20.ed6 cd6 21.Bc6+–) 19.bc6 dc6 20.Rac1 (< 20.Qc6 Rc8 21.Qa4 Rc3 22.Qa7 Qd4+–) 20...Qg5 21.Bc6 g6 22.Rcd1 a5 23.Qb6 Rac8 24.c4 Rb8 25.Qa5 Rbc8 26.d5 Rfd8 27.de6 Rd1 28.ef7 Kf7 29.Rd1 Rc6 30.e6! (30...Re6 31.Qg5+–) 1–0. Scarian – surfnsuds, internet, 2005.

4.d4 Bb7 5.Bd3 e6 6.Ne2 Ne7 7.0–0 g6 8.Nd2 Bg7 9.Nb3 Nb3 10.ab3 0–0 11.f3 d5 12.c3 c5 13.bc6 Bc6 14.Bg5 Qd7 15.Qd2 Rfe8 16.Bh6 Bb5 17.Bg7 Kg7 18.c4 dc4 19.bc4 Bc6 20.Rfb1 Qc7 21.Qc3 Bd7 22.c5 bc5 23.Ra5 Rec8 24.Rc5 Qd8 25.d5 Kg8 26.d6 Nc6 27.Ba6 Rcb8 28.Bb7 Be8 29.Qd3 Rb7 30.Rb7 Rb8 31.Rb8 Qb8 32.d7 Bd7 33.Qd7 Ne5 34.Rc8 Kg7 35.Qf7 Kf7 36.Rb8 1–0. Rosner,Dirk – Borchardt,Simone, TSC, 2000.

4.Nf3 Bb7 5.Nc3 Nf6 6.Bd3 g6 7.0–0 (7.Ba3 Bg7+=) 7...Bg7 8.Qe2 0–0 9.Ba3 Re8 10.Rac1 (10.h3 e5=) 10...c6 (10...d5 11.e5 d4 12.Ne4= (worse is 12.ef6 ef6 13.Qd1 dc3–/+)) 11.bc6 Bc6 (11...Nc6 12.h3=) 12.Rb1 Ng4 13.Nb5 Bb5 (13...d5 14.Bb2 e5 15.ed5 Bd5 16.c4+=) 14.Bb5 Qc7 15.c3 (15.d4 a6 16.Bd3 Nf6+/–) 15...a6 (15...Rac8 16.Ba6 Rcd8 17.g3+/–) 16.Ba6+/– Be5 (16...Nc6 17.Bc1+/–) 17.g3 Nh6? (better is 17...Bg7+/–) 18.Ne5+– Qe5 19.Rb6 e6 (19...Nc6 20.Rfb1 Nb8 21.d4+–) 20.Bd6 Qg5 (20...Qg7 21.Rfb1+–) 21.Rfb1 Ng4 (21...e5+–) 22.h4 Qh5 (22...Qh6 23.Bf4 Qh5 24.R1b5+–) 23.R1b5 Nc6 (23...f5 24.Ra5 Nf6 25.Qh5 Nh5 26.ef5 gf5+–) 24.Rh5 gh5 25.d4 Kh8 (25...Nf6 26.Bd3 Kg7 27.e5+–) 26.Qd2 Rg8 27.Qf4 (27.Qf4 Rg6 28.Qf7+–) 1–0. pierre – gretskyy, internet, 2009.

4.Nf3 d5 5.ed5 Qd5 6.Nc3 Qe6 7.Be2 (7.Qe2 Nf6+=) 7...Bb7 8.0–0 Nf6 (8...0–0–0 9.Re1+=) 9.Re1 Qd7 (9...Qd6 10.Bd3+=) 10.Ne5+– Qd6 (10...Qf5 11.d4+–) 11.Bf3 Bf3 12.Qf3 (12.gf3?! e6=) 12...Rd8 (12...Rc8 13.Bb2 Qd4 14.Rad1+–) 13.d4! h6? (13...Qd4 14.Nc6 Double attack (14.Nc6 Decoy)) 14.Bf4+– g5 (14...Nd5 15.Bg3 Qe6 16.Nc6 Nc6 17.Re6 (17.bc6?! Qc6 18.Nd5 Qd5=) 17...Nd4 18.Qd3 Nc3 19.Qc3 fe6 20.Qc7+–) 15.Nf7! gf4 (15...Kf7 16.Bd6 Discovered attack) 1–0. DEFFM – GuestYLSV, freechess.org, 2018.

3.e4 c6

4.d4 cb5 5.Bb5+= e6 (5...Nf6 6.Nd2+=) 6.Nf3+/– Qb6 7.Bd3 g6 (7...Nc6 8.Be3+=) 8.0–0 Bg7 9.Be3 Nc6 10.e5 d6 11.Nbd2 (11.d5 Qb2 12.dc6 Qa1+/–) 11...de5 (11...Qc7 12.ed6 Qd6+/–) 12.Ne5 (12.de5 Qc7 13.Bb5+=) 12...Nd4= 13.Ndf3 f6?? (13...Nf3 14.Qf3 Qc7 15.Bb5 Kd8 16.Rad1 Bd7 17.Rd7 Qd7 18.Nd7 Ne7 19.Qb7 Nc6 20.Nc5 Ke8 21.Bg5 Bf6 22.Bf6 Kf8 23.Qa8 Nd8 24.Qd8) 14.Bd4+– (14.Nd4?! fe5 15.Nb5 Qc6+/–) 14...Qc7 15.Bb5 Ke7 16.Nd3 Kf7 17.Re1 Nh6 18.c3 a6 19.Ba4 (19.Qa4 Nf5+–) 19...Rd8 20.Bb3 b6 (20...Nf5 21.Qe2 Rd6 22.Nc5+–) 21.Ng5! fg5 22.Qf3 A double attack 22...Nf5 23.Qa8 Bb7 (23...Nd4 24.cd4 Kf8 25.Rac1+–) 24.Re6 (24.Re6 Ba8 25.Rc6 Ke8 26.Rc7 Bd4 27.cd4 Rd4 28.Rc8 Rd8 29.Re1 Ne7 30.Bf7 Kd7 31.Be6 Ke8 32.Rd8 Kd8 33.Ne5+–; better is 24.Be6!? Kf8 25.Qa7 Nd4 26.cd4 Bd4+–) 1–0. Sokolowski,Mieczyslaw – Nowakowski,Jozef, corr 1AMM Poland, 1991.

4.d4 d5 5.ed5 Qd5 =.

4.d4 Nf6 5.Nd2 =.

4.Nf3 cb5 5.Bb5+= e6 (5...Nf6 6.Nc3+=) 6.0–0 Qb6 (6...a6 7.Be2+=) 7.Qe2 (7.Nc3 Bb4 8.Rb1 Qd6+/–) 7...a6+= 8.Bd3 Nc6 9.c3 (9.Bc4 Nd4 10.Nd4 Qd4+=) 9...g6 (9...Bc5 10.Ba3+=) 10.Na3 Qc7 11.e5 b5 12.Nc2 (12.Be4 d5 13.Bc2 f6=) 12...Bg7 (12...f6 13.a4 ba4 14.ef6 Nf6 15.Ra4+=) 13.Re1 (13...f6 14.a4 ba4 15.Be4+=; 13.Be4 d5 14.ed6 Qd6+/–) 1–0. Pilczuk,Andrzej – Nowakowski,Jozef, corr 1. AMM Poland, 1991.

4.Nf3 d5 5.bc6 de4 6.cb7 Bb7 7.Ne5 =.

3.e4 d5

4.ed5 Nf6 5.Nf3 Nd5 (5...Qd5 6.Nc3 Qd6 7.Be2=) 6.c4 (6.d4 Bg4=) 6...Nf6 7.Bb2 a6 8.Nc3 (8.ba6 Ra6 (worse 8...ba6 9.Qa4 c6 10.Bc3+–) 9.c5 Ra8=) 8...g6 (8...Bg4 9.h3 Bf3 10.Qf3 ab5 11.cb5=) 9.Be2 ab5 10.Nb5 c6 11.Nc3 Bg7 12.d3 (12.Ne4 Bg4=) 12...0–0 13.Qd2 (13.0–0 Bf5=) 13...Qd6 14.0–0 Rd8 15.Rfd1 Bf5 (15...Qc7 16.Qg5=) 16.Rac1 (16.d4 Qb4 17.Ne4 Qd2 18.Ned2 Nh5=+) 16...Qc7 (better 16...Qb4 17.Ba1 b6=) 17.c5 (better 17.Qe1!?=+) 17...Nc4!–/+ 18.Qc2 (18.dc4 Rd2 Pinning (18...Rd2 Deflection)) 18...Nd7 19.Ba1 Na3 20.Qd2 (20.Qb2 Nc5 21.d4 Ne6–+) 20...Nc5–+ 21.Qe3 Ne6 22.Rd2 (22.Kh1 Qf4–+) 22...Nd4 23.Bf1? (better 23.Nd4 Bd4 24.Qh6–+) 23...Nf3 24.Qf3 Bh6 (24...Bh6 25.Rdd1 Bf4–+) 0–1. mgilbert – pierred, net–chess.com, 2017.

4.e5 Nc4 5.d4 Bf5 6.Bc4 dc4 7.Be3 (7.Nf3!?=) 7...Qd5+= 8.Nf3 Qb5 9.0–0 (better is 9.Nc3!? Qb2 10.Kd2+=) 9...Qb2–+ 10.Nbd2 c3 11.Nb3 Qc2 (11...Bc2 12.Qe2 Be4 13.Qb5 Bc6 14.Qd3+=) 12.Qc2 Bc2 13.Rfc1 Bf5 14.Rc3 0–0–0 15.Rac1 c6 16.Rd1 (16.Ng5 Nh6–/+) 16...e6 17.Nbd2 (17.Ng5 Bg6–/+) 17...Ne7–+ 18.Rcc1 h6 19.h3 Nd5 20.Nc4 Bg6 21.a4 Kd7 22.a5 Be7 23.Ne1 b5 24.ab6 ab6 25.Ra1 Ra8 26.Kf1 b5 27.Nd2 Ra4 28.Ra4 (28.Nb3 Rha8–+) 28...ba4 (worse is 28...Ne3 29.Ke2 ba4 30.Ke3–+) 29.Ra1 Ra8 30.Nc4 c5! 31.dc5 Ne3 32.fe3 Bc5 33.Ke2 Kc6 34.Nd3 Bf8 35.Kd2? (35.Nf4–+) 35...Rd8 (35...Rd8 36.Nd6 Bd6 37.Rc1 Kb6 38.ed6 Rd6–+) 0–1. hal1958 – Helena, playchess.de, 2003.

4.e5 Nh6 5.d4+= c5 (5...g6 6.Nf3+=) 6.bc6 (6.dc5 e6+=) 6...Nc6= 7.Bb5?? (better 7.Bh6 gh6 8.Nc3=) 7…Qa5–+ (7...Qa5 8.c3 Qb5–+) 0–1. mic – pierred, net–chess.com, 2017.

4.ed5 Qd5

5.Bb2 Nc4 6.Qc1 (6.Bc4!? Qc4 7.Nc3=) 6...Qb5–/+ 7.Nc3 Qb2 8.Qb2 Nb2 9.Rb1 Nf6 10.Rb2 a6 11.Nf3 b6 12.a4 Bb7 13.Bd3 e6 14.Be2 Bd6 15.0–0 Ke7 16.Re1 Rhd8 17.Nd4? (17.d4–+) 17...Bf4 18.Nf5 (18.Nb3 Bd2 19.Nd2 Rd2 20.a5–+) 18...ef5 19.Bf3 Kf8 20.Bb7 Bd2 21.Ba8 Be1 (22.Rb3 Bc3–+) 0–1. Neffgen,Dieter – Fiedler,Peter, T0076 DESC, 2003.

5.Nc3 Qc5 6.a4 Nf6 7.Ba3 Qe5 (7...Qb6 8.Nf3=) 8.Be2 Bg4 9.d4 Be2 (9...Qe6 10.h3 Be2 11.Nge2=) 10.Nge2 (10.de5 Bd1 11.Rd1 Nc4 12.Be7 Be7 13.ef6 Bf6=) 10...Qf5 (10...Qg5 11.0–0=) 11.0–0 (11.Ng3 Qd7=) 11...0–0–0 12.Ng3 (12.Bc5 Kb8=) 12...Qg4 (12...Qd7 13.Bc5=) 13.Qg4 (13.Nce4 Qg6 14.Nf6 Qf6 15.Qg4 Kb8+=) 13...Ng4 14.Rfd1 Nc4 15.Nce4 (15.a5 a6=) 15...Nf6 (15...f5 16.Ng5 (worse 16.Nf5 Na3 17.Ra3 e6–/+) 16...Na3 17.Ra3+–) 16.Ng5 (16.Bc5 Ne4 17.Ne4 e6+=) 16...e6= 17.Bc1 (17.Bc5 Bc5 18.dc5 Rhf8=) 17...Rd7 18.a5 Nd5 19.Ne2 (19.N5e4 Bb4=) 19...Nd6 (19...Bb4 20.Nf3 a6 21.ba6 ba6 22.Ra4 Na5 23.Ne5+–) 20.a6 (20.Rb1 Be7=) 20...b6 (better 20...Nb5!? 21.Ne4 Nb6–/+) 21.Rb1 (21.Nf3 f6=) 21...Be7 (21...Nc4 22.Ne4=) 22.Nf3 Nc4 23.Nd2 Na5 24.c4 Nf6 25.c5 Nd5 (25...Rhd8 26.cb6 cb6 27.Nf3+=) 26.Bb2 (26.Ba3 c6 27.Nb3 Nc4 28.bc6 Rdd8=) 26...Kb8 (26...Re8 27.Nf3 Rdd8 28.Ne5+=) 27.Nc1 (27.Nf3 f6+=) 27...c6 28.bc6 (28.Nd3 cb5 29.Ba1 Nc7=) 28...Nc6 29.Nd3 Rhd8 30.Nc4 Rc7 (30...Bf6 31.cb6 ab6 32.Rdc1=) 31.Na3 (31.Ba1 Ka8=) 31...Ka8 (31...h5 32.Nb5 Rcc8 33.Rdc1=) 32.Nb5 Rcc8 33.h3 (33.Rdc1 h6=) 33...bc5 34.dc5 f6 35.Ba3 (35.Rdc1 e5=+) 35...Nb8=+ Exerts pressure on the isolated pawn 36.c6 (36.Rdc1 Na6 37.Ra1 Rb8–/+) 36...Ba3–/+ 37.Nf4 Rc6 (37...Nf4 38.Rd8 Ne2 39.Kf1 Bd6 40.Rc8 Ng3 41.fg3 Bg3 42.c7 Bc7 43.Nc7) 38.Ne6 Re6 (38...Na6?? 39.Nd8 Rb6 40.Rd5+–) 39.Rd5 Rc8 40.Na3 Ra6 (40...Na6?! 41.Rd7 Rec6 42.Nb5=) 41.Nb5 Rb6 42.Re1 Na6 (42...Rc2 43.Na3 Rcc6 44.Nb5–/+) 43.Nd4 g6 (43...Rb7 44.Ne6–/+) 44.Rd7=+ ½–½. pcmvr – pierred, net–chess.com, 2017.

5.Nc3 Qe5 6.Be2 Bg4 (6...Qd6 7.Nf3+=) 7.d4+= Be2 8.Nge2 (worse is 8.Nce2 Qb5 9.Nf3 e6+=) 8...Qh5 (8...Qf5 9.d5=) 9.Qd3 (9.d5 Nf6 10.Qd4 e6 11.de6 fe6+=) 9...e6 (9...Qg4 10.Nd5 Qd7 11.Ne3+/–) 10.0–0 (10.Bd2 a6+=) 10...Bd6 Threatening mate: Qxh2 11.Ng3 White begins to deal mighty blows 11...Qg6 12.Nce4 Be7 (better is 12...Bg3!? 13.fg3 Ne7+=) 13.Bd2+/– b6 (13...f5 14.Ba5 fe4 15.Qc4+–) 14.Ba5 ba5 15.Qc3 0–0–0 (15...Kd8 16.Rad1 Nf6 17.d5 ed5 18.Qc6+–) 16.Qa5 Kb8 (16...Rd4? 17.Qa7 e5 18.Qa8 Kd7 19.c3 Re4 20.Ne4+–) 17.Rab1 Rd5 (17...Rd7 18.Qa6 Rd5 19.c4+–) 18.c4 Rd4 19.b6! Threatening mate... how? 19...cb6 (19...ab6 20.Rb6) 20.Rb6! Ka8 (20...ab6 21.Qb6 A double attack) 21.Qa6 1–0. b4_player – Orla, gamecolony.com, 2007.

5.Nf3 Nf6 6.d4 g6 (6...Bg4!?=) 7.Be2 a6 8.Nc3 Qd6 9.a4 Bg7 10.Ba3 Qd7 (10...Qd8!?+=) 11.Bb4+/– b6 12.Ne5 Qf5 13.Ba5 ba5 14.Bf3 Ra7 15.Rb1 Nd7 (15...Bd7!?+/–) 16.Nc6+– Rb7 17.0–0 Nb6?? (better is 17...e6+–) 18.ba6 Bh6 (18...Ra7 19.Re1 Qf6 20.Na7 Ba6 21.Bc6 Kd8 22.Nd5+–) 19.Re1 e6 20.d5 Nd5 (20...Rb8 21.de6 Be6 22.Nb8 0–0+–) 21.ab7 Bb7 22.Nd5 Kd7 23.Nf6 Kc8 24.Qd7# 1–0. Taulien,Hans_Juergen (2350) – Pardini,Valmir (1870), remoteschach.de, 2007.

5.Nc3 Qd6

6.Nf3 Nf6 7.Be2 e5 8.d3 Be7 9.0–0 0–0 10.Ne4 (10.Qe1 a6+=) 10...Ne4=+ 11.de4 Be6 12.Qd6 Bd6 13.Rd1 f6 14.a4 Bc5 (14...Rfd8 15.Bd2 Nc4 16.Bc3=+) 15.Ba3= Ba3 16.Ra3 Rfd8 17.Rad3 Rd3 18.Bd3 (18.cd3 c5=+) 18...Kf7 19.Kf1 c6 (19...b6 20.Ke2=+) 20.Ke1 (20.g3 Rd8=+) 20…Rd8=. Pcmvr – PassedPawn, ChessWorld.net, 2003.

6.Nf3 Nf6 7.Be2 e5 8.Bd3 Qc5 9.0–0 Bd6 10.a4 0–0 11.Ne4 Ne4 12.Be4 a6 13.d3 ab5 14.Ng5 (14.Be3!? Qb4 15.ab5+/–) 14...g6 15.Nh7 (15.Be3!? Qb4 16.Bd2=) 15...Kh7+= 16.Qh5 Kg7 17.Bh6 Kg8 (17...Kf6!? 18.Qf3 Ke6+=) 18.Bg6= Threatening mate: Bf5 18...e4 (18...fg6 19.Qg6 The nicest combinations are those leading to mate) 19.Bf7!? Rf7 20.Qg6 Kh8 21.Qf7 Do you see the mate threat? 21...Qe5 22.g3 Be6 23.Bg7 Qg7 24.Qe6 Nc6 25.Qe4 The passed pawn on f2 will become decisive later 25...Be5 26.Rab1 b4 27.Rbe1 Bc3 28.Qh4 (28.Re3!?+/–) 28...Qh7+= 29.Qf4 (29.Re4 Qh4 30.Rh4 Kg7 31.Rg4 Kf7 32.Rf4 Kg6=) 29...Be1= 30.Re1 Qg7 31.Re6 Rf8 (31...Ra4?? 32.Re8 Kh7 33.Qh4 Qh6 34.Rh8 Kh8 35.Qh6 Kg8 36.Qf4+–) 32.Qh4 Kg8 33.Qc4 Kh8 34.Qc5 Rf6 35.Qh5 Kg8 36.Re8 Rf8 37.Re4 Qh7 38.Qg4 Qg7 39.Qe6 (39.Qh3 Ne7+/–) 39...Qf7 40.Rg4 Kh7 The mate threat is Qxf2 41.Rh4 Kg8 42.Qg4 Qg7 43.Qh5 White threatens.... what? 43...Ne5 44.f4 (44.Rb4?! b6+/–) 44...Ng6 45.Rg4 Kf7 46.f5 Ke7 47.Qg6 (worse is 47.Rg6 Qa1 48.Kg2 Qc3 49.f6 Rf6 50.Rf6 Qf6+–) 47...Qg6 (47...Qb2 48.Qg7 Qg7 49.Rg7 Kd6 50.Rg6 Kd7 51.f6+–) 48.fg6 (worse is 48.Rg6 Ra8+–) 48...Rg8 (48...c5 49.h4 Rg8 50.h5+–) 49.h4 Kf6 50.h5 c5 (50...Kg7 51.Rb4 b6 52.g4+–) 51.h6 (51.g7!? Rg7 52.Rg7 Kg7+–) 51...Rg6 52.Rf4 Ke5 53.h7 Rg3 54.Kh2 Kf4 55.h8Q Rg5 56.Qh4 Kf5 57.Qe4 Kf6 58.Qb7 Re5 59.a5 Re2 60.Kg3 Rc2 61.a6 Rc3 62.Qf3 Ke5 63.a7 (63.a7 Ra3 64.a8Q Ra8 65.Qe4 Kd6 66.Qa8+–) 1–0. Woelfelschneider,Peter – Wittig, 2009.

3.e4 e5

4.Bb2 c5 5.Be5+– d6 6.Bb2 Nf6 7.d3 h5 (7...Be7 8.Nf3+–) 8.Be2 d5 9.ed5 Qd5 (9...Nd5 10.Bh5 Be6 11.Bf3+–) 10.Nf3 g5?? (10...Qd8!?+–) 11.Nc3 (better 11.Bf6 Rg8 12.Nc3+–) 11...Qf5 (11...Qd8 12.Ne4 Bg7 13.Nfg5 Ne4 14.Bg7+–) 12.Qd2 (better 12.Ne4 Rh6 13.Bf6 Rf6 14.Nfg5+– (worse 14.Nf6 Qf6 15.0–0 g4+–)) 12...Bh6? (12...g4 13.Nh4 Bh6 14.Nf5 Bd2 15.Kd2 Bf5 16.Nd5 Nd5 17.Bh8+–) 13.Qe3 (better 13.Ne4 Ne4 14.de4 Qh7 15.Qa5 g4+–) 13...Be6 (13...Kf8 14.Ne4 g4 15.Nfg5 Ne4 A) 16.Bh8?! Ng5 (16...Bg5? 17.de4 Be3 18.ef5+–) 17.Qg3 Ne6=+; B) 16.Qe4?! Bg7 17.Bg7 Kg7+–; C) 16.de4 Qg5 17.Qg5 (17.Bh8?! Qe3 18.fe3 Be6+–) 17...Bg5 18.Bh8+–) 14.Ne4 g4 (14...Ne4 15.Bh8 (15.Qe4?! Qe4 16.de4 Rg8+–) 15...Qh7 16.Be5+– (16.de4?! Qh8 17.Rd1 g4+–; 16.Qe4?! Qh8 17.0–0 g4+–)) 15.Nf6 (15.Nd6 Kf8 16.Nf5 Be3 17.Bf6 Bf5 18.fe3 gf3 19.Bf3 Rh6+–) 15...Qf6 16.Bf6 Be3 17.Bh8 (better 17.fe3 gf3 18.Bf3+–) 17...Bf2 (17...gf3 18.fe3 fe2+–) 18.Kf2 gf3 19.Bf3 Rd8 (19...a6 20.Rhb1+–) 20.Bf6 Rd7 (20...Rd6 21.Bc3 b6 22.Bh5+–) 21.Bc3 b6 22.Ba5 ba5 23.Bc6 a4 (23...Ke7 24.Bd7 Bd7 25.Rhe1 Kd6 26.a4+–) 24.Rhe1 Ke7 25.Bd7 Kd7 26.c4 (better 26.Re5 Kd6 27.Rh5 Bd7+–) 26...f5 (26...Kd6 27.Re4 Bf5 28.Rh4+–) 27.Re5 Kd6 28.Rae1 Bg8 29.Rf5 (29.d4 Be6 30.Re6 Kc7 31.dc5 a6 32.Re7 Kc8 33.Re8 Kc7 34.R1e7) 29...Be6 30.Rh5 Bh3 1–0. GuestLQRM – GuestLQMM, freechess.org, 2018.

4.Bb2 c6 5.Be5 Qe7 6.Nf3 d6 (6...f6 7.Bc3 Qe4 8.Be2+/–) 7.Bc3 Qe4 8.Qe2 Qe2 9.Be2 cb5? (better is 9...b6 10.Ba5 ba5 11.bc6 Rb8+–) 10.Ba5 g6 (10...a6 11.0–0+–) 11.Nc3 Nf6 (11...b6 12.Bb4+–) 12.Nb5 a6 (12...Ke7+–) 13.Nc7 (13.Nc7 Ke7 14.Na8+–) 1–0. pierre – fjume, internet, 2011.

4.Bb2 c6 5.Be5+= Nf6 6.Nc3 Bc5 7.Qf3 d6 8.Bf6 Qf6 9.Qf6 gf6 10.Nf3 Bg4 11.Rb1 0–0–0 12.Be2 Rhg8 13.h3 Be6 14.d4 Bb4?? (better is 14...Bb6 15.bc6 bc6+–) 15.Rb4 c5 (15...f5 16.g3+–) 16.Ra4 cd4 17.Nd4 b6 18.g4 h6 (18...d5 19.Ne6 fe6 20.ed5 ed5 21.Rd4+–) 19.f4 Kb7 20.f5 Rc8 (20...Bd7 21.Nd5+–) 21.fe6 fe6 22.Kd2 e5 (22...Rce8 23.Rf1 Rgf8 24.Bc4 Nc4 25.Rc4+–) 23.Nf5 Rcd8 24.Nh6 Rgf8 25.Nd5 (25...Rd7 26.Nf5+–) 1–0. marekt – Geordiedazza, ChessWorld.net, 2003.

4.Bb2 d5 5.ed5 Qd5 6.Nc3 Qe6 7.d3 (7.Nf3 Bd6 8.Ne4 Nf6+=) 7...Bb4 8.Nge2 (8.a3!? Bd6 9.Nf3=) 8...Nf6+= 9.a3 Bc5 10.Ne4?? (better is 10.Ng3–/+) 10...Ne4–+ 11.de4 Nc4 12.Bc3 (12.Nc3 Nb2 13.Qc1–+) 12...Na3 (better is 12...Qb6 13.Nd4 Be6–+) 13.Ng3 Qf6 14.f3 0–0?? (better is 14...Bd7 15.Ra3 Ba3–+) 15.Qc1= Qd6 (better is 15...Qh6!? 16.Qh6 gh6=) 16.Bb2+= Nc4? (better is 16...Qb6 17.Ba3 Bf2 18.Kd1 Be3+/–) 17.Bc4+– Be6 18.Be6 Qe6 19.c4 (19.Nf5 g6 20.Nh6 Kh8+–) 19...Rad8 (19...g6+–) 20.Ba3 b6? (20...Qb6 21.Nf5 g6 22.Ne7 Kg7+–) 21.Bc5 bc5 22.Ra7 Rd7 (22...Rd4 23.Nf5 Rc4 24.Qg5+–) 23.0–0 c6 (23...g6 24.Ra6 Rd6 25.Rd6 cd6 26.Qc3+–) 24.Ra6 Rd4 (24...Rc8 25.Qe3 Qc4 26.Rc6+–) 25.Rc6 (better is 25.Nf5!? Rd3+–) 25...Qc4 26.Rc5 Qc1 27.Rfc1 Rfd8 (27...Rb4 28.Re5 g6 29.Rec5+–) 28.Re5 (better is 28.b6 g6 29.b7 Rb4+–) 28...f6 (28...g6 29.Rec5+–) 29.Rec5 g6 30.Ne2 Rd2 (30...Rb4 31.Nc3 Rb8 32.Rc7+–) 31.R1c2 Rd1 32.Kf2 f5 33.e5 g5 34.Rb2 R8d2 (34...Kf7 35.b6 R1d7 36.Rc6+–) 35.Rd2 Rd2 36.Rc8 Kf7 (36...Kg7 37.b6 Rb2 38.Rc7 Kh6 39.b7+–) 37.b6 Rb2 38.Rc7 (better is 38.Rb8 Ke7+–) 38...Ke8 (38...Ke6 39.Rh7 Ke5+–) 39.b7 Kd8 40.Rc8 Kd7 41.b8Q Rb8 42.Rb8 h5 Black prepares the advance g4 43.Ke3 Ke6 44.Kd4 g4 45.f4 (45.Rb7 f4 46.Ke4 gf3 47.Nf4) 45...h4 46.Rb6 (46.Rb7 h3 47.Kc4 hg2 48.Nd4) 46...Kd7 (46...Kf7 47.e6 Kf6 48.Nc3 Kg7 49.e7 Kf7 50.Nd5 h3 51.Rf6 Kg8 52.e8Q Kg7 53.Rg6 Kh7 54.Nf6) 47.Kd5 Kc7 (47...h3 48.g3 Kd8 49.Rd6 Ke8 50.Rf6 Kd7 51.e6 Kd8 52.Rf8 Kc7 53.e7 Kb6 54.Ra8 Kc7 55.e8Q Kb6 56.Qc6) 48.Rf6 h3 (48...Kb7 49.e6 Kc7 50.Nd4 g3 51.Rf7 Kd8 52.Kd6 Ke8 53.Rf5 gh2 54.e7 h1Q 55.Rf8) 49.g3 Kd7 50.e6 Ke7 (50...Kd8 51.Rf8 Kc7 52.e7 Kb7 53.e8Q Ka6 54.Qc6 Ka5 55.Ra8 Kb4 56.Qb6) 51.Rf7 Ke8 (51...Kd8 52.Kc6 Ke8 53.Kd6 Kd8 54.Rf8) 52.Kd6 Kd8 53.e7 (53.Rf8) 53...Kc8 (53...Ke8 54.Rf8) 54.e8Q 1–0. Baer,Cy (1895) – Pscheidl,Carolin, remoteschach.de, 2007.

4.Bb2 Bd6 5.Nf3+= f6 6.Be2 Nc6?? (better is 6...a6+=) 7.bc6+– bc6 (7...dc6 8.0–0+–) 8.0–0 (8.d4 Rb8 9.de5 Rb2 10.ed6 cd6+–) 8...Rb8 9.Bc3 Bb4 10.Bb4 Rb4 11.c3 Re4 12.Bd3 Rg4 (12...Rf4 13.g3 Rg4 14.Ne5+–) 13.h3 (better is 13.Ne5 Rh4 14.Nf3+–) 13...Rg2 (13...Rf4 14.g3 e4+–) 14.Kg2 Qe7 (14...d5 15.Be2+–) 15.Bc2 (better is 15.Qa4 Nh6+–) 15...e4 (15...d5 16.d4+–) 16.Be4! Qe4 Decoy theme: e4 (16...d5 17.Bc2 Qd7 18.Rh1+–) 17.Re1 A pinning theme 17...f5 (17...Qe7 18.Re7 Ne7 19.Qb3+–) 18.Re4 (18.d3 Qe7+–) 18...fe4 19.Ng5 h6 (19...d5 20.Qa4+–) 20.Ne4 (better is 20.Qh5 Kd8 21.Nf7 Ke7 22.Nh8 Kd8+–) 20...Nf6 21.Nf6 gf6 22.Qe2 (22.Qh5 Ke7+–) 22...Kf7 (22...Kf8 23.Qe3 a6 24.Qf4+–) 23.Na3 (23.Qh5 Kg7+–) 23...Rg8 24.Kh2 Re8 (24...Rg5+–) 25.Qh5 Ke7 26.Re1 Kf8 27.Re8 (27.Qe8 Kg7 28.Re7) 27...Kg7 28.Re7 Kh8 (28...Kf8 29.Qe8) 29.Qe8 1–0. Richter,Rainer (2240) – Luksys,A, Marijampole op, 1994.

4.Bb2 f6 5.Nf3 (5.d4 ed4 6.Bd4 a6+=) 5...d6 (5...d5 6.ed5 Qd5 7.Nc3+=) 6.d4+= ed4 (6...Be6 7.d5 (7.de5?! de5 8.Nbd2 Qd6=) 7...Bd7 8.Bc3+–) 7.Nd4 c5 (7...Ne7 8.Bc3 c5 9.bc6 Nac6 10.Bc4+=) 8.bc6+– bc6 9.Nc3 (9.Bc3 d5+–) 9...c5 (9...Nh6!?+–) 10.Bb5+– Kf7?? (better 10...Ke7 11.Nb3 Rb8+–) 11.Qh5 g6 12.Qd5 Kg7 13.Qa8 cd4 14.Nd5 f5 (14...Be7+–) 15.Bd4 Kh6 (15...Kf7 16.Qa7 Nb7 17.Bh8+–) 16.Bh8 fe4 17.Ba6! Ba6 (17...Ne7 18.Ne7 Be7 19.Qc8 Qc8 20.Bc8 Nc4+–) 18.Qd8 Ne7 19.Qf8 Kg5 (19...Kh5 20.Nf6 Kg5 21.Ne4 Kg4 22.Qf3 Kh4 23.Qh3) 20.Qf4 Kh5 21.Nf6 1–0. Janek – Tituj, internet, 2019.

4.Bb2 Qf6 5.Nf3+= b6 (5...d6!?+=) 6.Be5+/– Qg6 7.Bd3 Qg2 (better is 7...Bc5!? 8.0–0 d6+–) 8.Rg1 Qh3 9.Rg7! (9.Bg7?! Bg7 10.Rg7 Qh6+/–; 9.Bc7?! d6 10.e5 Bb7+/–) 9...d6 (9...Bg7 10.Bg7) 10.Rg3 de5 11.Rh3 Bh3 12.Ng5 Bd7 13.Qf3 Nh6 14.Qf6 Rg8 15.Qe5 Be7 16.Nh7 Rc8 (16...Ng4 17.Qc7 Rg7+–) 17.Nf6 (17.Nf6 Kd8 18.Ng8 Ng8 19.Qg3+–) 1–0. marekt – Kunk, ChessWorld.net, 2003.

4.Bb2 Nf6 5.d3 (better is 5.Be5!? d6 6.Bc3+/–) 5...d6 6.Nf3 Be6 7.Be2 d5 (7...a6!?=) 8.ed5+= Qd5 9.a4 (9.c4 Bb4 10.Nbd2 Qd8 11.Be5 0–0+/–) 9...Qc5 (9...Bb4!? 10.c3 Bd6+=) 10.Ne5 Qb4 (better is 10...0–0–0!?+=) 11.Bc3+– Qc5 (11...Qf4 12.Qd2 (12.Ba5?! Qe5 13.Bc3 Bb4+=) 12...Qd2 13.Nd2+–) 12.0–0 Qd5? (better is 12...Nd5 13.Ba5 Qd4 14.Nf7 Bf7+–) 13.Re1 (13.Ba5?! Qe5 14.Bc3 Qf5+/–) 13...Bd6 (13...Bc5 14.Bf3 (14.Ba5?! Qe5 15.Bc3 Qf5+/–) 14...Qd6 15.Ba5 Bf2 16.Kf2 Qd4 17.Kf1 Qa1 18.Bb7+–) 14.Bf3 (14.Ba5? Qe5 15.Bf3 Qa1 16.Bb7 Rb8–+) 14...Qc5 15.Qd2 (15.Ba5?! Be5 16.c3 Qd6 17.Bb7 Bh2 18.Kh1 Rb8+–) 15...Be7 (15...0–0–0 16.d4 Be5 17.Re5 Qe5 18.de5 Rd2 19.Nd2 Nd7 20.Ba5 Ne5+–) 16.Ba5 b6 (16...0–0–0 17.Ra3 Ne8 18.Rc3+–) 17.Bc3 (better is 17.Bc6 Kf8 18.d4 Qd6 19.Ba8 ba5+–) 17...Nd7 (17...Nd5+–) 18.Ba8 f6 (18...0–0 19.Bc6 Ne5 20.Be5+–) 19.Nd7 Bd7 20.Qe3 (20.Bb4 Qd4 21.c3 Qg4+–) 20...0–0 (20...Qe3 21.Re3 Kd8 22.Nd2+–) 21.Qc5 (better is 21.Qe7 Qe7 22.Re7 Ra8 23.Rd7 Rc8+–) 21...Bc5 (21...bc5?? 22.Bd5 Kh8 23.Re7+–) 22.Bd5 Kh8 23.Bb2 Rd8 24.Nd2 Bf5 25.Bc6 Bd7 (25...Bb4 26.c3 Bd6 27.Ne4+–) 26.Bd7 Rf8 27.Re2 h5 28.Rae1 Rf7 29.Be8 Rf8 30.Bh5 Kh7 31.Re8 Kh6 32.Bf3 Rf7 33.Rh8 Kg6 34.Bh5 Kg5 35.Bf7 Bd6 36.Rh5 Kg4 37.h3 Kf4 38.Re4 1–0. Perez de Tudela Perales,F – Mari Valerio,JM, De Navidad de Silla op 2th, 2002.

4.Bb2 Qg5 5.Nf3+/– Qf6 (better is 5...Qg4!?+/–) 6.Be5+– (6.Ne5?! Qe6+–) 6...Qe6 (6...Qd8 7.Nc3+–) 7.Bc7 Qe4 8.Be2 Qb4 (8...b6 9.Nc3 Qb7+–) 9.a3 Qa4 (9...Qg4 10.Ba5 b6 11.Ne5+–) 10.Nc3 Qg4 11.Ba5 Nf6 (11...b6 12.Bb4! Bb4 13.ab4+–) 12.0–0 Ne4 (12...Be7 13.Re1 0–0+–) 13.Ne4 Qe4 14.Bd3 Qa4 15.Re1 Be7 16.Re7! Ke7 (16...Kf8 17.Qe2 Qe4 18.Qe4 g6 19.Qe5 f6 20.Qf6 Kg8 21.Rg7) 17.Qe2 Kf8 18.Bd8 g6 (18...Qe4 19.Qe4 g6 20.Bf6 h5 21.Re1 Kg8 22.Ng5 Rh6 23.Qe8) 19.Bf6 Qa3 (19...Qe4 20.Qe4 h6 21.Re1 Kg8 22.Qe8 Kh7 23.Qh8) 20.Ra3 d6 (20...h6 21.Qe7 Kg8 22.Bg6 fg6 23.Qg7) 21.Qe7 Kg8 22.Qd8 1–0. Taulien,Hans_Juergen (2350) – Tobias,Walter (2000), remoteschach.de, 2002.

4.Bb2 g6 5.Be5 Nf6 6.Bc3 b6 7.Qf3 Bg7 8.Ba5 ba5 9.e5 Nh5?? (better is 9...Qe7 10.d4 d5+–) 10.Qa8 0–0 11.Qa7 c6 (11...Be5 12.Nc3+–) 12.Nf3 (12.Nf3 cb5 13.d4+–) 1–0. pcmvr – Geordiedazza, ChessWorld.net, 2003.

4.d4 Bd6 5.Nf3+= h6 (5...Qe7!?+=) 6.Bd2 b6 (6...c6!? 7.de5 Bc5+–) 7.de5+– Bc5? (better is 7...Be7+–) 8.Ba5 ba5 9.Qd5 Bb6 (9...Bb4 10.c3 c6 11.bc6 dc6 12.Qd8 Kd8 13.cb4 ab4+–) 10.Qa8 Ne7 11.Bc4 0–0 12.0–0 c6 13.Qb8 Bc7 14.Qa7 Bb6 15.Qb8 cb5 16.Bb5 Ng6 17.Nbd2 Bc5 (17...Bc7 18.Qa8 Ne5 19.Rab1+–) 18.Rfd1 d6 (18...Re8 19.Nc4+–) 19.Nb3 Qe7 (19...Nh4 20.Be2 Nf3 21.Bf3+–) 20.ed6 Qe4 (20...Bd6 21.Qd6 Qe4 22.c4+–) 21.Nc5 Qc2 22.Qb6 Nf4 23.d7 Bd7 24.Nd7 Rc8 25.Nde5 Qb2 26.Qa7 Rf8 27.Bc4 Kh7 28.Qd7 Qb6 29.Qf5 Ng6 30.Nd7 Qb4 31.Nf8 Qf8 (31...Kh8 32.Ng6 fg6 33.Qc8 Qf8 34.Qf8 Kh7 35.Qg8#) 32.Bf7 Qe7 (32...Qa8 33.Qg6 Kh8 34.Ng5 Qg8 35.Bg8 Kg8 36.Rd8#) 33.Bg6 Kh8 (33...Kg8 34.Qd5 Qf7 35.Qf7 Kh8 36.Rd8#) 34.Qc8 (34…Qf8 35.Qf8#) 1–0. marekt (2450) – Smack, ChessWorld.net, 2003.

4.Nf3 c6 5.a4 (5.Ne5 cb5 6.Nc3 b4+/–) 5...cb5 (5...Nf6 6.Nc3=) 6.Bb5 a6 7.Bd3 g6 (7...Bc5!?=) 8.Ne5+/– Bg7 9.Bb2 d6 10.Nc6 Bg4?? (10...Nc6 11.Bg7 Discovered attack; 10...bc6 11.Bg7 Discovered attack) 11.f3 (11.Bg7 bc6 12.f3+– (12.Bh8 Bd1 13.Kd1 f6–/+; 12.Qg4 h5 13.Qe2 Rh7+–)) 11...Bb2 (11...Qh4 12.g3 Qh6 13.Na5 Bb2+–) 12.Ra2?? (better is 12.Nd8 Ba1 13.Nf7 Kf7 14.fg4+–) 12...Qb6?? (12...bc6 13.Rb2 Qh4 14.Ke2–+) 13.fg4?? (better is 13.Na5 Qa5 14.Rb2+/–) 13...bc6–+ (worse is 13...Qc6 14.Rb2 Qa4 15.Nc3+/–; 13...Nc6 14.c3 Nf6 15.Rf1 Ng4 16.a5 (16.Qg4? Ne5 17.Qg3 Qb3 18.Rb2 Qb2–+) 16...Na5 17.Qg4=) 14.c3 Nf6 15.Qc2 Ng4 (better is 15...Rb8 16.h3–+) 16.Rf1? (16.Rb2 Qf2 17.Kd1 Qg2 18.Rf1–+) 16...Nh2 (16...Rb8 17.Be2 Ne5 18.d4–+) 17.Rf4?? (better is 17.Rb2 Qd8 18.Rf2–/+) 17...Qg1–+ 18.Bf1 Nc4 (18...Nf1?! 19.Rf1 Qg2 20.Rb2–+) 19.Rb2 Ne3! 20.Qd3 (20.de3 Qe3 Double attack) 20...Ng2 21.Kd1 Nf4 22.Qd6 Qf1 (22...Nf1?! 23.Qe5 Kd8 24.Qd6 Ke8 25.Qe5 Ne6 26.Qh8 Kd7 27.Qa8=) 23.Kc2 Qd3! 24.Qd3 Nd3 25.Kd3 Rd8 (25...Ke7 26.Rb7 Ke6 27.Na3–+) 26.Ke2 f5 27.ef5 gf5 28.d4 f4 29.Kd3 Nf3 30.Rf2 (30.Rb6 Rf8 31.Ra6 c5–+) 30...Ne1 (better is 30...Ne5! 31.Ke4 Ng6–+) 31.Kd2 0–0 32.Ke1 Rde8 33.Kf1 a5 (33...f3 34.Rb2–+) 34.Nd2 (34.Rg2 Kh8 35.Rg5 Re3 36.Ra5 Rfe8–+) 34...Re3 35.Rf3 Rf3 36.Nf3 Rf5 37.Kf2 c5 38.Ne5 cd4 39.cd4 h5 40.Kf3 Kg7 41.Ke4 Kf6 42.Nd7 (42.Nf3 Ke6–+) 42...Kg5 43.Kf3 (43.Ne5 Rf8–+) 43...h4 44.Ne5 (44.Nc5 h3 45.Ne4 Kh4 46.Nd2–+) 44...Re5! 45.de5 h3 46.e6 Kf6 47.e7 Ke7 48.Kf2 Kf6 49.Kg1 Kf5 50.Kh2 Kg4 0–1. Baron wd von Blanc,heart pirate – karlsdad, ChessWorld.net, 2011.

4.Nf3 d6 5.d4 ed4 6.Nd4 Be6 7.Bd2 b6 8.Bd3 Nf6 9.0–0 Be7 10.Ne6 fe6 11.Qe2 0–0 12.e5 de5 13.Qe5 Qd6 14.Re1 (better is 14.Qe3!?+/–) 14...Qe5= 15.Re5 Bd6 (better is 15...Ng4!? 16.Re6 Bc5=) 16.Re6+/– Ng4 17.f3 Bh2 18.Kf1 (18.Kh1 Be5 19.Bc3 Nf2 20.Kg1 Nd3 21.cd3+=) 18...Nb7 (better is 18...Be5 19.c3 Rad8=) 19.Be4 Rab8 20.Bd5 Kh8 21.Bb7 Rb7 22.Nc3 Be5 23.Ke2 Bc3 24.Bc3 Nf6 25.Re7 Kg8 26.Rd1 Rbb8 27.Bf6 Rf6 28.Rdd7 Kf8 29.Rg7 Re8 30.Kf1 h5 31.Rh7 Rg6 32.Rc7 (32.Rc7 Kg8 33.Ra7+–) 1–0. PassedPawn – Geordiedazza, ChessWorld.net, 2003.

4.Bb2 d6

5.Bc3 c5 =.

5.Bc3 Nf6?? 6.Ba5+– Ne4 7.Bc4 b6? (7...d5 8.Bd3 Nf2 9.Kf2+/–) 8.Bb4 (8.Bd5!? Rb8 9.Be4 ba5+–) 8...Bb7 (8...d5!? 9.Bf8 dc4+–) 9.Nf3+– Be7 10.0–0 0–0 11.Qe2 Bf6 12.Bd3 Nc5 13.Bc5 e4 14.Be4 Be4 15.Bd4?? (better is 15.Qe4 Ba1 16.Be3+–) 15...Bf3= 16.Qf3 Bd4 17.c3 Be5 18.d4 Bf6 19.Nd2 a6 20.a4 Qd7 21.Ne4 Be7 22.d5 (22.c4!?=) 22...ab5+= 23.ab5 Qb5 24.Nd2 f5 (24...Bf6 25.Rab1 Qa5 26.Rfc1–/+) 25.c4 (25.Ra8 Ra8 26.Qf5 Re8+/–) 25...Qe8 (25...Qb2 26.Ra8 Ra8 27.Qd3+=) 26.Ra3 (26.Ra8!? Qa8 27.Qe2=) 26...Ra3+= 27.Qa3 g5 (27...Bf6 28.Nf3+=) 28.Re1= Qf7 29.Re6 Rc8 30.Qa6 Re8 31.Qa1 c6 32.Qa7 (32.Qe1 cd5 33.cd5 Kf8+=) 32...b5 (better is 32...cd5!? 33.cd5 Bf8+=) 33.cb5 cb5 34.Qb7 (34.Qd7 b4+=) 34...b4 (better is 34...Bf6 35.Re8 Qe8–/+) 35.Qb4+= Exerts pressure on the isolated pawn 35...Qh5 36.f3 g4 37.Qf4 Bg5?? (better is 37...Kf7+/–) 38.Re8+– Qe8 39.Qg5 Kh8 40.Nf1 (40.Qf5 gf3 41.Ne4 fg2 42.Nd6 Qe3 43.Kg2 Qe2 44.Kg3 Qe3 45.Kg4 Qg1 46.Kf3 Qh1 47.Ke3 Qg1 48.Kd3 Qd1 49.Kc4 h6+–) 40...Qe5 (40...gf3 41.Qf5 fg2 42.Ng3+–) 41.fg4 Qd4 42.Kh1 fg4 43.Qd8 Kg7 44.Qe7 Kg6 45.Qd6 Kg7 46.Qe7 Kg6 47.d6 Qd1 48.Kg1 Qd4 49.Qe3 (better is 49.Ne3 Qa1 50.Kf2 Qf6 51.Kg3 Qe7 52.de7 Kf7+–) 49...Qd6 50.Qe4 Kg5 51.g3 (51.Qh7!? Qd4 52.Kh1 Qd1 53.Qe7 Kf5+–) 51...h5 52.Kg2 h4 (52...Qd7 53.Qf4 Kg6 54.Nd2+–) 53.gh4 Kh4 54.Qe1 (54.h3 Qd7+–) 54...Kh5 (54...Kg5+–) 55.Ng3 Kg5 (55...Kg6+–) 56.Ne4 1–0. gbymar – ffrancis, ChessWorld.net, 2012.

5.Bc3 Nf6?? 6.Ba5 Ne4 7.Nf3 Bg4 (7...Nf6 8.Be2+–) 8.Be2 Bf3 (8...d5 9.d3 Bf3 10.Bf3+– (10.gf3?! Nf2 11.Kf2 Bc5 12.Kg3 Qg5 13.Kh3 Qh5 14.Kg2 Qg5 15.Kf1 Qh4=; 10.de4?! Bg2 11.Rg1 Be4=)) 9.Bf3 (9.gf3?! Nf6+–) 9...d5 10.Qe2 Bb4 (10...Qd6 11.Be4 de4 12.Qe4 0–0–0+–) 11.Bb4 b6 (11...Qd7 12.Nc3 f5 13.d3 Nc3 14.Qe5 Kd8 15.Qc3 Qb5 16.0–0+–) 12.Nc3 (better 12.d3 a5 13.Ba3+–) 12...Nc3 (12...f5 13.d3 a5 14.ba6 c5 15.Nd5 Qd5 16.de4 Qd4+–) 13.Qe5 Kd7 14.Bg4 f5 15.Bf5 1–0. Janek – Erendor, internet, 2017.

5.c4 Be6 6.Qa4 b6 7.Nf3 h6 (7...Nf6!? 8.Qc2 c5=) 8.d4+= Nf6 (8...a6 9.Qc2+=) 9.Bd3 (9.Qc2 ed4 10.Nd4 Qe7+=) 9...Be7 (9...Nh5 10.g3+=) 10.0–0 (10.de5 de5 11.Ne5 Ng4+/–) 10...0–0 (10...ed4 11.Nd4 0–0 12.Qc2+=) 11.d5 (better is 11.de5!? de5 12.Rd1+/–) 11...Bg4= 12.Nfd2 Nh5 13.f3 (13.h3 Nf4 14.Qc2 Nb7=) 13...Bd7 14.Bc3 (14.g3 Bh3 15.Re1 Bg5=) 14...Nf4 (14...Bg5 A) 15.Ba5?? Be3 16.Rf2 Qh4–+ (16...ba5?! 17.Qc2–+; 16...Bf2?! 17.Kf2 ba5 18.Qa5–/+); B) 15.Rd1=) 15.Bc2 (15.Qc2 Nb7 16.Nb3 Bg5=) 15...Bg5 (15...a6!? 16.Qb4 Ne2 17.Kh1 Bg5+=) 16.Ba5+= ba5 17.Qa5 Bh4 (better is 17...Ne2 18.Kf2 Nd4+=) 18.Nc3?? (better is 18.Kh1+=) 18...Qg5–+ 19.Rf2 Bf2 (better is 19...Nh3 20.Kf1 Bf2 21.Nd1–+) 20.Kf2 Qg2 (better is 20...Nh3 21.Ke2 Qg2 22.Kd3 f5–+) 21.Ke1 (21.Ke3–+) 21...Qh2 22.Nf1 Qc2 23.Nd2 Ng2 (better is 23...Qd3!? 24.Nb3 Qf3 25.Nc1–+) 24.Ke2 Nf4 (better is 24...f5 25.Rb1–+) 25.Ke1 Qd3 26.Kd1 Bh3 (better is 26...Ng2 27.Rc1 Ne3 28.Ke1 Qd2 29.Kd2 Nc4 30.Kd3 Na5 31.Ke2–+) 27.a3 (27.Rb1 Bg2 28.Rb3 a6–+) 27...Ng2 (27...a6!? 28.ba6 Bg2 29.Kc1 Ra6 30.Qb4–+) 28.Ra2 Ne3 29.Kc1 f5 (29...a6 30.Qb4–+) 30.a4 (30.Qb4 a6–+) 30...fe4 (30...Nc4 31.Nc4 Qc4 32.Rc2–+) 31.Nce4 Bg2 (31...Rf3 32.Qc3 Rf1 33.Nf1 Qf1 34.Kd2 Nc4 35.Kc2–+) 32.Qc3 Qe2 33.Qb3 (33.Kb1–+) 33...Bf3 34.Kb2 Be4 35.Ka3 Nc2! 36.Rc2 (36.Qc2 Bc2) 36...Bc2 37.Qc2 Rf3! 38.Kb4 (38.Nf3 Exploits the pin 38...Qc2 Eliminates the defender c2) 38...Rb8 0–1. AbstractPoetic – joelynnturner, internet, 2007.

5.c4 Nf6 6.Bc3 Ne4 7.Ba5 Nf2 8.Kf2 Qh4 9.g3 Qd4 10.Kg2 Qa1 A) worse is 11.Bc7 Bf5 (11...Qa2?! 12.Nf3=) 12.d3 Rc8–/+; B) 11.Qb3=.

5.d4 ed4 6.Qd4 c6 7.Nf3 Bd7 8.a4 c5 9.Qd2 b6 10.Bc3 Nb7? (10...Nf6 11.Ba5 ba5 12.Nc3+/–) 11.Ng5?? (11.Bc4 Nf6+–) 11...Nh6? (11...Be7 12.Nf7 Kf7 13.Bc4 Kg6+/–) 12.Bc4 Qe7 (12...Be7 13.f4 0–0 14.0–0+/–) 13.0–0 Nd8 14.a5 Bc8 (14...Rc8+–) 15.ab6 Ne6 16.Bd5 Bb7 (16...Ng5 17.Ba8 ab6 18.f4+–) 17.Ra7 Qg5 (17...Ra7 18.ba7 Ng5 19.Qg5 f6 (19...Qg5?? 20.Bb7 Qd8 21.Bc6 Ke7 22.b6+–) 20.Qh5 g6+–) 18.Qg5 Ng5 19.Bb7 Rb8 20.Bc6 Kd8 21.Rd7 Kc8 22.b7 Rb7 23.Rb7 f6 24.Nd2 Ne6 (24...Nh3 25.gh3 g5 26.Ra1 d5 27.Ra8) 25.Ra1 Nc7 26.b6 Be7 (26...Na6 27.Ra6 d5 28.Ra8) 27.Rc7 Kd8 (27...Kb8 28.Ra8) 28.Ra8 1–0. pcmvr – latourladame (2275), net–chess.com, 2015.

5.d4 ed4 6.Qd4 Nf6 7.Nf3 Be7 8.Bc3 c5 9.Qa4 b6 10.Bd3 Nb7 11.0–0 0–0 12.Rd1 Bd7 (12...Qe8!?+/–) 13.Bf6 Bf6 14.e5! Be5 (14...de5 15.Qe4) 15.Ne5+– de5 16.Qe4 Nd6?? (better is 16...g6 17.Qb7 Bb5+–) 17.Qh7# 1–0. marekt – chessH, ChessWorld.net, 2003.

5.d4 Be7 6.Qd2 c6 7.de5 de5 8.Be5 Nf6 9.Bd3 0–0 10.Bc3 b6 11.e5 Nd5 12.Ba5 ba5 13.Be4 Qb6 14.Bd5 cd5 15.Nc3 (15.Qd5 Bb7 16.Qd7 Bh4–+) 15...Be6 16.Nf3 Rad8 17.Ne2 Rc8 18.Nfd4 Bc5 19.c3 Bd4 20.Nd4 Rc4 21.0–0 Rfc8 22.Rfc1 (22.Ne6?! fe6 23.a4 Qc7=) 22...Qc5 23.Rab1 h6 24.h3 Qc7 25.f4 Rb8 26.f5 Bd7 27.e6 fe6 28.fe6 Be8 29.Rf1 Rc3 30.Nc6! Rc6 (30...Qc6 31.bc6) 31.bc6 Rb1 32.Rb1 Qc6 33.Re1 Qc5 34.Kh1 Kf8 35.Re5 Bc6 (35...Ke7+–) 36.e7 1–0. PassedPawn – chessH, ChessWorld.net, 2003.

5.d4 Be7 6.de5 de5 7.Qd8 Bd8 8.Be5 f6 9.Bd4 Be6 10.Nd2 Ne7 11.Ngf3 0–0 12.Bc5 b6 13.Bb4 Nb7 14.Nd4 Bf7 15.0–0–0 a6 16.ba6 Nc5 17.Bc5 bc5 18.N4b3 Bb3?! (18...Ng6+–) 19.Nb3 c4 20.Bc4 Kh8 21.Nc5 Ng6 22.Nd7 Re8 23.Bf7 Re7 24.Bd5 Ra7 25.Nb8 c5 26.Nc6 Ra8 1–0. pcmvr – chessH, ChessWorld.net, 2003.

5.d4 Nf6 6.Qd2=.

5.d4 Nf6 6.Nd2 ed4 7.Bd4 d5 8.e5 =.

5.d4 Nf6 6.Nd2 Bd7 7.Ngf3 Be7 8.Bd3 0–0 9.h3 a6 10.a4 c5 11.bc6 bc6 12.0–0 Qc7? 13.c4 c5 14.de5+/– de5 15.Be5+– Qc6 16.Re1 Nb7 17.a5 Nd8 18.Nb3 Ne6 19.Bg3 Rfd8 20.Ne5 Qb7 21.Ng4 Ng5? 22.Nf6+– Bf6 23.e5 Be7 24.Qb1 Qc6?? 25.f4 Nh3 26.gh3 Bh3? 27.Be4 Qc7 28.Ba8 Ra8 29.Kf2 Qc6 30.Rg1 g6 31.Nd2 Bf8 32.Nf3 Bf5 33.Qb6 Qe4 34.Qb3 Bg7 35.Rge1 Qc6 36.Qb6 Qc8 37.Rab1 Bb1 38.Rb1 Qd8 39.Qd6 Qa5 40.Qd5 Qd8 41.Rb7 Qd5 42.cd5 a5 43.Rb1?? a4+/– 44.Ra1 h6 45.Ke3 Kf8 46.Kd3 Ke8 47.Kc4 Bf8 48.d6 Ra5 49.Bf2 Kd7 50.Bc5 Kc6 51.Bb4 Ra8 52.Nd4 Kd7 53.Kd5 h5 54.Nc6 Bh6 55.Bd2 a3 56.Na5 Bf4 57.Bb4 Bh6 58.Ra3 Bg7 59.Nc4 Ra3 60.Ba3 h4 61.Ne3 Bh6 62.Ng4 Bg7 63.Bb2 g5 64.Bd4 Bf8 65.Nf6 (65...Kd8 66.Bb6 Kc8 67.d7 Kb8 68.d8Q Kb7 69.Qc7 Ka6 70.Qa7 Kb5 71.Qa5#) 1–0. gtate (1980) – mcampo (1955), net–chess.com, 2006.

5.d4 Nf6 6.de5 Ne4 7.Nd2+=.

5.Nf3 Nf6 6.h3 Ne4 7.Nc3 Bf5 8.d3 Ng5 9.Be2. gtate (1925) – oholubec, net–chess.com, 2004.

5.Nf3 Bg4 6.d4 Qf6 (6...f5 7.h3 Bh5 8.Qd2 fe4 9.Ng5 (worse is 9.Qa5 ef3 10.de5 de5+=) 9...ed4 10.Ne6=) 7.Nc3 (7.Bc3 b6+/–) 7...ed4 (7...Ne7!?=) 8.Nd5+/– Qd8 9.Qd4 c6 10.Ne3 f6?? (better is 10...Bf3 11.gf3 Ne7+/–) 11.Ng4+– c5 (11...Ne7 12.Qa4+–) 12.Qd2 Qe7 (12...a6 13.Ne3+–) 13.Bd3 (13.Qa5!? f5 14.Ne3 f4+–) 13...h5 (13...c4 14.Qa5 cd3 15.cd3+–) 14.Ne3 b6 15.Nd5 Qd7 16.0–0 c4 17.Be2 Rc8 18.a4 g5 (18...Ne7 19.Nd4+–) 19.Bf6 Bg7 20.Bg7 Qg7 21.Ng5 c3 (21...Rh6 22.f4+–) 22.Qf4 Ne7 (22...Qg6+–) 23.Nf6 Qf6 24.Qf6 Rf8 25.Bh5 Kd7 26.Bg4 Kd8 27.Qf8 (27.Qd6 Ke8 28.Qd7) 27...Kc7+– 28.Qe7 1–0. JagreenLern – pjc49, ChessWorld.net, 2011.

3.e4 g5

4.Bb2 f6?? 5.Qh5# 1–0. Trkn – fahed youssef, itsyourturn.com, 2000.

4.Bb2 Nf6 5.e5 Nh5?? (better is 5...Nd5+/–) 6.Qh5+– e6 7.d4 (7.Nf3 Be7+–) 7...Rg8 (7...d5 8.Nf3 h6 9.Bc3+–) 8.Bd3 (8.Bc3 b6+–) 8...Qe7 (8...h6 9.Ne2+–) 9.Ne2 (9.Ba3 d6+–) 9...b6 (9...Nc4 10.Bc1 (10.Qh7?! Rg7 11.Qh3 Nb2+/–) 10...Nb6 11.Qh7+–) 10.Ng3 (10.Ba3 d6+–) 10...Bb7 11.Be4 (better is 11.Ba3 d6 12.Ne4+– (worse is 12.Bh7 Rh8+–)) 11...Bc6 (11...Qb4 12.Bc3 Qb5+–) 12.bc6 Nc4 (12...0–0–0 13.cd7 Qd7 14.Nd2+–) 13.cd7 Qd7 14.Ba8 Nb2 15.Qf3 (15.Ne4!? Be7 16.Qh7 Rf8 17.Nf6 Bf6+–) 15...Qd4 16.Bc6 Kd8 17.0–0 Rg6 (17...Qf4 18.Qe2 Ke7 19.Bb5+–) 18.Nc3 (18.Qf7 Kc8 19.Qe8 Qd8 20.Bd7 Kb7 21.Qd8 Ka6 22.Qf8 c5 23.Bc8 Ka5 24.Qe7 Rg7 25.Qg7 h5 26.Qa7 Kb5 27.Ba6 Kb4 28.Qb6 Ka4 29.Qb5) 18...Rh6 (18...Qf4 19.Rad1! Nd1 20.Qd1 Bd6 21.ed6 cd6 22.Re1+–) 19.Nce2 (19.Qf7 Kc8 20.Qe8 Qd8 21.Bd7 Kb8 22.Qd8 Kb7 23.Qc8) 19...Qe5 20.Qe4 (20.Qf7 Qg3 21.Qf8) 20...Qg7 (20...Qe4 21.Ne4 Bd6 22.f4+–) 21.Qd4 (21.Nf5 Qf6 22.Nh6 Qh6 23.Qd4 Bd6+–) 21...Ke7 (21...Qd4 22.Nd4 Bg7+–) 22.Qd7 Kf6 23.Ne4 (23.Ne4 Kg6 24.f4+–) 1–0. Trkn – upthetoon, itsyourturn.com, 2000.

3.Nf3 b6

4.e3 a6 5.Bb2 =.

4.e3 Bb7 5.Bb2 Nf6 6.Be2 (6.Bd3 e6=) 6...g6 (6...e6 7.0–0=) 7.0–0 (7.Bf6 ef6 8.0–0 Qe7+=) 7...Bg7 8.d4 0–0 9.Nbd2 Nh5 (9...a6 10.a4=) 10.Nb3 (10.c4 a6+=) 10...c5 (10...a6 11.Na5 ba5 12.ba6 Ba6 13.c4+=) 11.Na5+– ba5 12.Ne5 (12.Rb1 cd4 13.Bd4 Nf6+–) 12...d6 (12...a6 13.Rb1 d6 A) worse 14.Bh5 de5 15.dc5 ab5=+ (worse 15...gh5 16.c6 Bc8 17.Qd8 Rd8 18.b6+=); B) 14.Nc6+=) 13.Nc6+= (worse 13.Bh5 de5 14.Bf3 Bf3 15.Qf3 cd4=+) 13...Bc6 14.bc6 Qc7 15.Bf3 (15.Bh5 gh5 16.Rb1 cd4 17.ed4 Rab8+=) 15...Rab8 16.Rb1 Nf6 (16...cd4 17.ed4 d5 18.Bd5+– (18.Bh5?! gh5 19.Re1 e6=)) 17.d5 Rfe8 (17...a4 18.c4+–) 18.c4 e6 (18...e5 19.Qc2+–) 19.Qa4 (19.Qd3 a4+–) 19...Rb4 20.Qc2 ed5 (20...a4 21.Ba3 Rb1 22.Rb1+–) 21.cd5+– Rbb8 22.Bc3 Re5?? (better 22...Rec8+–) 23.Be5 de5 24.Rb8 Bf8 (24...Qb8 25.Qc5 Ne8+–) 25.Rfb1 Qd6 26.R1b7 Nd5 27.Bd5 Qd5 28.c7 Kg7 29.c8Q Bd6 30.Qg8 Kf6 31.e4 Qd4 (31...c4 32.Qh8 Kg5 33.Qc1 Qd2 34.Qd2 Kh5 35.Qh7 Kg4 36.h3) 32.Rf7 Kg5 33.Qc1 Kg4 (33...Qe3 34.Qe3 Kh5 35.Qh7 Kg4 36.f3) 34.h3 Kh4 (34...Kh5 35.Qh7) 35.Rh7 (35.Qh7) 1–0. DEFFM – cucy, freechess.org, 2018.

4.e3 c5 5.a4 Bb7 6.c4 d5 7.d3 (7.cd5 Bd5 8.Bb2 Bb3=) 7...h6 (7...dc4 8.dc4 Qd1 9.Kd1=+) 8.Be2 (8.cd5 Qd5 9.Bb2 Nf6=) 8...e6 (8...dc4 9.dc4 Qd1 10.Kd1 Rd8 11.Nbd2=+) 9.Bb2 Nf6 10.0–0 Bd6 11.Bc3 (11.Nbd2 0–0=) 11...0–0 12.Nbd2 Bc7 13.Nb3 Nh7?? (better 13...dc4!? 14.Na5 ba5 15.dc4 Ne4 16.Qd8 Rad8=) 14.Na5 (better 14.Ba5!? ba5 15.Nc5+–) 14...ba5+= 15.Nd2 d4 16.ed4 Qd6 (better 16...cd4 17.Bb2 Qh4+=) 17.dc5?? (better 17.f4 cd4 18.Bb2+–) 17...Qc5 (17...Qh2) 18.Bf3 Bf3 19.Nf3 (19.gf3?? Qg5 20.Kh1 Qf4 21.Be5 Be5 22.Ne4 Qh2) 19...Bb6 (19...Ng5 20.Re1 Rad8 21.Ng5 Qg5 22.Re4+–) 20.Ra2 (20.Ne5 Nf6+–) 20...f6 (20...Qf5 21.d4+–) 21.Re1 (better 21.Qe2 Qc8 22.d4+–) 21...Qf2?? (better 21...Rfd8+–) 22.Rf2 Bf2 23.Kf2 Rfe8 24.Ba5 Nf8 25.Bb4 (25.c5 Kh8+–) 25...Nd7 26.d4 Nb6 27.c5 (better 27.Qb3!? Rad8+–) 27...Nd5 28.Qb3 (28.Qb3 Kf7 29.Kg3+–) 1–0. Darkseid (1825) – fastrook, ChessWorld.net, 2006.

4.e3 e6 5.Bd3 (5.Bb2 a6=) 5...Nf6 (5...a6 6.Bb2=) 6.Bb2 Be7 7.Nc3 0–0 8.Qe2 d5 9.Qf1 (9.Ne5!?=) 9...c5+= 10.Be2 Bd6 11.Nb1 (11.Na4 Bb7+=) 11...Qe7 12.Be5 c4 13.a3 Ne4 (13...a6 14.ba6 Ba6 15.Ra2–/+) 14.Bd6 Qd6 15.d3 cd3 16.Bd3 Nc5 (16...e5 17.Nfd2 Nc5 18.f3–/+) 17.Nc3 f5 18.Nd1 (18.Be2 Qc7 19.Ra2 Ne4–/+) 18...e5–/+ 19.Be2 f4 20.Rc1 (20.ef4 Rf4 21.Ne3 Ne4–/+) 20...Be6 (20...a6 21.ef4 Rf4 22.Nc3–/+) 21.ef4 (21.Ng5 d4 22.e4 Rfc8–/+) 21...Rf4 22.Ra1 (22.Ng5 Rc8–/+) 22...Raf8 23.Ng5 Qc7 24.g3 (24.Ra2 Bd7–/+) 24...R4f6 25.Qg2 e4 26.0–0 Qe5 (26...Bd7 27.Ne3 Qe5 28.Nh3–+) 27.Ne6 Ne6 28.c3 Rg6 29.Re1 Nf4! 30.Qh1 (30.gf4 Rg2 Double attack (30...Rg2 Pinning; 30...Rg2 Deflection; 30...Rg2 Decoy)) 30...Nb3 31.Ra2 (31.Rb1 Qf5 (31...Ne2?! 32.Re2 Nc5 33.Rbb2–/+) 32.Rb2 Nh3 33.Kg2 Nf2–+) 31...Nc1 (31...Ne2?! 32.Rae2 Qh5 33.Ne3–/+) 32.Rc2 Nfe2 33.Ree2 Ne2 34.Re2 Qh5 (34...Rgf6 35.Qg2–+) 35.Rd2 Rc8 36.h4 Rc5 37.Qh3 Rd6 (37...Rb5? 38.Qc8 Kf7 39.Qd7 Kf8 40.Qb5+–) 38.Qf1 Qe8 (38...Rd8 39.a4–+) 39.a4 Qe5 (39...Qe6 40.Rd4–+) 40.Qe2 Rg6 (40...Rd8 41.Qe3–+) 41.Ne3 Qe6 (41...Kf8!? 42.Rd4 Rc3 43.Qd2–+) 42.Qd1 Qf7 (42...Rf6 43.Nd5 Rf8 44.Nf4–/+) 43.c4 Qf3 (43...Rd6!?–/+) 44.Rd5= Qd1 45.Rd1 (45.Nd1? Rc4 46.Nb2 Rc1 47.Nd1 e3 48.fe3 Rg3 49.Kf2 Rg4–+) 45...Rc7 46.a5 (46.Nd5 Rc4 47.Ne7 Kf7 48.Ng6 Kg6 49.Rd6 Kf5=) 46...ba5+= 47.Ra1 Rc5 (47...Rd6 48.Ra5 h5 49.Ra2+=) 48.Ra5 a6 49.Ra6 (49.Nd5 Kf7+=) 49...Ra6 50.ba6 Ra5 51.g4 Ra6 52.Kg2 Kf7 53.Kg3 Rf6 54.Nf5 (54.f4 Ke6+=) 54...g6 55.Nd4 Rd6 56.Nb5 Rf6 (56...Rc6 57.g5+=) 57.Nd4+= Ke7 58.g5 (58.c5 Kd7+=) 58...Rf8 (58...Rd6 59.Nb5 Rd2 60.c5–/+) 59.Nc2 (59.c5 Rc8 60.c6 Rd8–/+) 59...Kd6–/+ 60.Ne3 ½–½. Angus,George – Varley,Trevor, IECC, 1997.

4.e4 Bb7 5.Nc3 c5 6.d4 Rc8 7.d5 d6 8.Bd3 Qd7 9.0–0 g6 10.Bb2 Nf6 11.e5 Ng4 12.Ne4 Bg7?? (better is 12...de5 13.Ne5 Ne5 14.Be5 Rg8+–) 13.e6 fe6 14.Bg7 Rg8 15.de6 Qe6 16.Nfg5 Qf7 (16...Qd7 17.Be2 h5+–) 17.Nf7 Kf7 18.Bc3 Ne5 19.Ng5 Kf6 20.f4 h6 21.fe5 (21.fe5 Kg5 22.Bd2 Kh4 23.Rf4 Kg5 24.Qg4#) 1–0. guest449 – guest1061, ICC, 2003.

4.e4 Bb7 5.Nc3 c6 6.Bb2 Nf6 7.e5 Nd5 8.Nd5 cd5 9.Bd4 e6 10.Bd3 d6 11.Qe2 Qc8 (11...de5 12.Be5 f6 13.Bc3+=) 12.ed6 Qd7 (12...f6 13.Nh4 Kd8 14.Qh5 Bd6 15.Ng6+= (worse is 15.Bh7 Qc2 16.Ng6 Qe4 17.Be3 Qg2+=)) 13.0–0 (13.Ng5 h5+/–) 13...Qd6 14.Ng5 (14.Ng5 Qf4 15.Qh5+=). Taulien,Hans_Juergen (2350) – Tsobas,Christos (1710), RSS7E pro–1 remoteschach.de, 2003.

4.e4 Bb7 5.d3 c6 6.bc6 Bc6 7.Be2 e6 8.0–0 h6 9.c4 Qf6 10.e5 Qf5 11.Nc3 Bf3 12.Bf3 d5 (better is 12...Rc8!? 13.Re1 Be7+/–) 13.cd5 ed5 (13...Rc8 14.Qa4 Kd8 15.de6 fe6 16.Qd4 Ke8 17.Be3+–) 14.Nd5 Rd8 (14...Rb8+–) 15.Bg4 Qg6 (15...Qg4 16.Nc7 Kd7 17.Qg4 Kc7+–) 16.Nc7 Ke7 17.Ba3 1–0. Wall,Bill – Janko,D, chess.com, 2009.

3.Nf3 d5

4.e3 Bf5 5.Be2 e6 6.0–0 Bd6 7.Bb2 Nf6 8.Nh4 0–0 9.Nc3 c6 10.Nf5 ef5 11.bc6 Nc6 12.Bf3 Qc7 13.g3 Qa5 14.d3 Ne5 15.a4 a6 16.Bg2 Rfe8 17.Ne2 Qd8 18.Nf4 Bc7 19.Rb1 Rb8 20.Bd4 b6 21.Qd2 b5 22.ab5 Rb5 23.Rb5 ab5 24.Qc3 g5 25.Ne2 Qd6 26.Rb1 Rb8 27.f4 gf4 28.Nf4 Neg4 29.Bd5! Nd5 (29...Qd5 30.Nd5) 30.Nd5 Bd8 31.Qc5 Qh6 32.h4 Qe6 33.c4 (33.Rb5?! Rc8 34.Qa7 Rc2+/–) 33...b4 34.Rb4 Rc8 35.Qb5 Ra8 36.Qb7 Qc8 37.c5 Kf8 38.c6 h5 39.Rb1 Ke8 40.c7 Qb7 41.Rb7 (41.cd8Q?! Rd8 42.Rb7 Rd5+–; 41.cd8R?! Rd8 42.Rb7 Rd5+–) 41...Rc8 42.Rb8 Rc7 43.Nc7 Kd7 44.Nd5 f6 45.Nf4 Ne5 46.Rb5 Bc7 47.Nh5 Kc6 48.Rc5 Kb7 49.Kg2 Bd6 50.Rb5 Kc8 51.Be5 fe5 52.d4 Bc7 53.de5 Kd7 54.Ng7 Kc6 55.e6 Bd8 56.Rf5 Kb6 57.h5 Be7 58.h6 Bd8 59.h7 Be7 60.h8Q Ka7 61.Ra5 (61.Rb5 Bf8 62.Qh4 Bb4 63.Qb4 Ka6 64.Ra5) 61...Kb6 (61...Kb7 62.Qa8 Kb6 63.Ne8 Bf6 64.Qa6) 62.Qa8 Bd6 (62...Ba3 63.Ne8 Be7 64.Qa6) 63.Qa7 (63.Ne8 Bg3 64.Qa6) 63...Kc6 64.Qd7 (64.Ne8 Bg3 65.Qa6) 64...Kb6 65.Rb5 Ka6 66.Qb7# 1–0. GLChess211 – Cilian413, computer chess game, 2000.

4.e3 g6 5.Bb2 f6 6.d4 b6 7.a4 Bf5 8.Nbd2 Bh6 9.c4 dc4 10.Nc4 (worse is 10.Bc4 Nc4 11.Nc4 a6+=) 10...Nc4 11.Bc4 g5 (11...Be4 12.0–0+–) 12.0–0 (12.Qb3 Qd7 13.Bg8 e6+–) 12...g4 (12...Qd7 13.Qb3 e6 14.e4+–) 13.Nh4 Be4?? (13...Bc8+–) 14.Qg4 f5 15.Qh5 Kf8 (15...Kd7 16.d5 Nf6 17.Bf6 ef6 18.Qh6 Kc8+–) 16.Qf7 1–0. Taulien,Hans_Juergen (2350) – Mueller,Lisa (2000), remoteschach.de, 2003.

3.Nf3 Nf6

4.e3 d5 5.Bb2 (--> 1.b4 Nf6 2.Bb2 Nc6 3.b5 Na5 4.e3 d5 5.Nf3).

4.e3 g6=.

4.e4 Ne4=+ 5.Bd3 Nf6 (5...Nc5 6.Be2=+) 6.0–0= d5 7.Bb2 Be6 (7...e6 8.Qe2=) 8.Nd4 (8.Qe2 c5 9.bc6 Nc6=) 8...Bg4= 9.Qe1 e5 (better 9...Qd6!?=) 10.Qe5 Be7 (10...Qe7 11.Qg3 0–0–0 12.Ba3+–) 11.f3 (11.Re1 Kf8+–) 11...Bd7 (11...Be6!?+–) 12.Ba3+– c5 13.Bc5 b6 (13...Kf8 14.Be7 Qe7+–) 14.Bb4 Nc6?? (14...Kf8 15.a3 Bc5+–) 15.Nc6 Qc8 (15...Bc6 16.Re1 Ne4 17.Be4 de4 18.bc6 f5+–) 16.Qe7 1–0. guest901 – barsellac, chessclub.com, 2019.

4.Nc3 d5

5.e3 Qd6 6.d4 Bg4 7.Be2 e6 8.0–0 Nc4 9.Bc4 dc4 10.h3 Bh5 11.g4 Bg6 12.Ne5 0–0–0 13.Bb2 (13.Qe2 Nd5 14.Qc4 f6 15.Ng6 hg6=) 13...Qb4 14.Rb1 Bd6?? (better is 14...Nd7 15.Ng6 hg6+=) 15.a3+– White is in command 15...Qb2 16.Rb2 Be5 17.Qe2 (17.de5?! Rd1 18.Rd1 Nd7+–) 17...Bd6 18.b6 ab6 19.Qc4 h5 20.g5 Nh7 (20...Ne4 21.Ne4 Be4 22.Rb6+–) 21.f4 Bf5 (21...Kb8 22.Nb5+–) 22.Rf3 (22.Kg2 Nf8+–) 22...Kd7 (22...Kb8 23.Nb5+–) 23.e4 Bg6 24.Qa4 Kc8 25.Qa8 (better is 25.e5 Bf8 26.Nb5 Be4+–) 25...Kd7 26.Qb7 Rb8 27.Qa7 (better is 27.Qa6+–) 27...Ra8+= 28.Qb7 Rhb8 29.Rb6 Rb7 30.Rb7 Ra3 31.Kf2 (31.e5 Kc6 32.Rb2 Be7+=) 31...f6 (31...Bf4 32.h4–+) 32.h4? (better is 32.e5 fe5 33.fe5+=) 32...Bf4!–+ 33.gf6 (33.Rf4 Deflection from c3 33...Rc3) 33...gf6 (33...Nf6 34.e5 Rc3 35.ef6 Rf3 36.Kf3–+) 34.Rf4? (34.Nb5 Rf3 35.Kf3=) 34...Rc3–+ 35.Rb2 (35.Rb4 Rc2 36.Ke3 e5–+) 35...e5 36.de5 fe5 37.Rf3 Rc4 38.Rfb3 (38.Rg3 Be4 39.c3 Nf6–+) 38...Re4 (38...Be4 39.Re3–+) 39.Rb5 (39.Rg3 Rf4 40.Ke3 Be4 41.Rg7 Kd6–+) 39...Ke6 (39...Nf6 40.R5b4 Rb4 41.Rb4 Bc2 42.Ke1–+) 40.Kg3 (40.R5b4 Nf6 41.Re4 Be4–+) 40...Rc4 41.c3 (41.R5b4 Rc3 (worse is 41...Rc2 42.Rc2 Bc2 43.Rc4–+) 42.Kf2 Nf6–+ (42...Rc2?! 43.Rc2 Bc2 44.Rc4–+)) 41...Rc3 42.Kf2 Nf6 43.Ke1 (43.R5b4 Ne4 44.Kg1 Bf5–+) 43...Rc4 (43...Rh3 44.Rg2 Bd3 45.Rb8–+) 44.Re2 (44.R5b4 Rg4–+) 44...c5 (44...Ne4 45.Reb2–+) 45.Reb2 (45.Rb6 Kf5 46.Rf2 Rf4 47.Rf4 ef4–+) 45...Rh4 46.Rb6 Kf5 47.Rb8 Rh1 48.Ke2 Ke4 49.R2b7 (49.Rc2 Rh2 50.Kd1 Rc2 51.Kc2 h4–+) 49...Rh2 50.Ke1 (50.Kf1 Nd5–+) 50...h4 (50...Ke3 51.Rb3 Bd3 52.Rd3 Kd3 53.Kf1–+) 51.Rb6 (51.Rf8 Rh1 52.Kd2 Nd5–+) 51...Nd7 52.Rg6 0–1. NN – Fritz 8, 2004.

5.e3 Bg4 6.d4 e6 7.Bd3 Bb4 8.Bb2 Ne4–/+ 9.a3!? Bc3 10.Bc3 Bf3 11.gf3 Nc3 12.Qd2 Nb5 13.Qa5 –/+.

5.e3 Bg4 6.d4 e6 7.Bd3 Bb4 8.Bd2!? =.

5.e3 Bg4 6.d4 e6 7.Bd3 Bb4 8.Bb2 Ne4–/+ 9.Be4 de4–+

10.h3 ef3 11.hg4 Nc4 12.Qc1 Nb2?! 13.Qb2 c5 14.a3 fg2 15.Rg1 –/+.

10.h3 Bf3 11.gf3 Nc4 12.Qc1 ef3

13.a3 Ba5 14.Rg1 c5 15.bc6 Qb6 –+ (15...Nb2?! 16.Qb2 bc6 17.Rd1–/+).

13.Rg1 c5!? 14.a3 Ba5 15.dc5 –+.

13.Rg1 c5!? 14.a3 Ba5 15.Kf1 cd4 16.ed4 Nb2 17.Nd1 –+.

13.Rg1 Nd6

14.Qd1 Ne4 15.Qf3 Bc3?! 16.Bc3 Nc3 17.Rg7 –/+.

14.Qd1 Ne4 15.Qf3 Qd5 16.Rg7 0–0–0 –+.

14.Qd1 Ne4 15.Qf3 Nc3 16.Rg7 Nb5?! 17.c3 Be7 18.Qf7 Kd7 19.d5 ed5 20.Qf5 Kc6 21.Qe6 Nd6 22.Rd1 = (< 22.Qe7 Qe7 23.Re7 Nc4 –/+.

14.Qd1 Ne4 15.Qf3 Nc3 16.Rg7 Qd7 17.Qb7 Ke7 –+ (17...Nb5 18.c3 Bc3 19.Bc3+/–).

14.Qd2 Ne4 15.Qd3 Qh4 16.Rf1 –+.

14.Qd2 Rg8 15.Qd3!? Qh4 16.Rg3 –/+.

13.Rg1 Rg8

14.a3 Nb2?! 15.ab4 Nc4 16.Qd1 =+.

2.b5 Nb4?

3.a3 Nc2 4.Qc2 a6 5.e3 ab5 6.Bb5 Ra5 7.Nc3 Ra3 1–0. GuestNQKQ – GuestHTQZ, freechess.org, 2017.

3.Ba3 e6 4.c3 Nd5 (4...Qf6 5.d4 Nd5 6.Bf8 Kf8 7.e4+/–) 5.Nh3 (5.Bf8 Kf8 6.e4 Nb6+=) 5...Nh6 (5...Ba3 6.Na3 Ngf6 7.c4=) 6.e4 Nf6 7.Ng5 (7.Bf8 Rf8 8.e5 Nfg4+=) 7...Nfg4 8.Qf3?? (8.Nf3 Ba3 9.Na3 d5=) 8...Ne5?? (better is 8...Qg5 9.Bf8 Ne5–+) 9.Qf4= Ng6 10.Nf7? (better is 10.Qe3=) 10...Nf7–+ 11.Qg3 Nd6 12.c4? (12.Qf3–+) 12...Ne4 13.Qd3 (13.Qe3 Ba3 14.Na3 Qf6–+) 13...Nc5 (better is 13...Nf2 14.Kf2 Qf6 15.Kg1 Qa1 16.Bf8 Rf8–+) 14.Qe2 Qf6 15.Nc3 Na4! 16.c5 (16.Na4 Qa1) 16...Nc3 17.Rc1 (17.Qh5 Ne4 18.0–0–0 Qa1 19.Kc2 Qa2 20.Bb2 Qa4 21.Kb1 Nf2 22.Re1–+) 17...Ne2 18.Be2 Ne5 (18...Nf4!? 19.Bf1–+) 19.d4 Nf7 20.Rc3 Qd4 21.Rf3 Qa1 (21...Bc5 22.Bc5 Qc5 23.0–0–+) 22.Bd1 Qa2 23.Bc1 Bc5 24.Rf4 0–0 (24...e5 25.Rf7 Bb4 26.Kf1 Qc4 27.Kg1 Qc1 28.h3 Kf7 29.Kh2 Qf4 30.Kg1–+) 25.Bh5 Qa1 (better is 25...Qa5!? 26.Bd2 Qb5 27.Bd1–+) 26.0–0 e5 27.Rf5 d5 28.g4 g6 (better is 28...Bf5 29.gf5 a6 30.ba6 Qa6 31.Rd1–+) 29.Bh6 Nh6 (better is 29...Qa4 30.Bf8 Kf8 31.Rf7 Kf7 32.Rc1 Qb5 33.g5 gh5 34.Kg2–+) 30.Rf8 (30.Ra1?? Nf5 31.Rc1 Bf2 32.Kf2 Nd4 33.Ke1 gh5–+) 30...Kf8 31.Ra1 gh5 32.g5 Ng4 33.Rc1 Bf2 34.Kf1 Be3 35.Rc7 Nh2 36.Ke1 Nf3 (better is 36...Bg5 37.Rh7 h4 38.Rc7–+) 37.Ke2 Bb6 38.Rh7 Bg4 (38...Ng5 39.Rh6–+) 39.g6 Nh2 (better is 39...Ng5 40.Kd2 Nh7 41.gh7–+) 40.Kd2 Bf5 (better is 40...Ba5!? 41.Ke3 Rd8 42.Rf7 Kg8 43.Rb7–+) 41.g7 (41.Rf7 Kg8 42.Rf5 Kg7–+) 41...Kg8 (better is 41...Kf7 42.Rh5 Nf3 43.Kd1–+) 42.Rh8 Kg7 43.Ra8 Nf3 44.Ke2 Nd4 45.Kf2 h4 46.Re8 Nb5 47.Ke1 e4 (better is 47...Ba5 48.Kd1 Nc3 49.Kd2–+) 48.Re5 Ba5 49.Kf2 Bb6 (49...Kf6 50.Rd5 a6 51.Ke3–+) 50.Kg2?? (50.Ke1 Nd4 51.Rd5–+) 50...h3–+ 51.Kg3 Bc7 52.Kf4 Kf6 53.Ke3 Be5 54.Kd2 h2 55.Kc2 h1Q 56.Kb3 Qc1 57.Kb4 Bd7 58.Ka5 (58.Kb3 Qc4) 58...Qa3 0–1. Rettkowski,Marcel – Lausch,Axel, remoteschach.de, 2002.

3.a4?? e5= 4.e3 (4.c3 Nd5=) 4...Nf6 (4...d6+=) 5.c4 (5.c3!? Nbd5 6.d3=) 5...d5–/+ 6.Ba3 (6.Bb2 Bf5 7.Na3 dc4 8.Bc4 Bd3–/+) 6...Bf5 7.Bb4 Bb4 8.Nf3 Qd6 9.Be2 (9.a5 a6–/+) 9...0–0 (9...d4 10.ed4 e4 11.c5–+) 10.0–0 (10.cd5 Qd5 11.0–0 Rfd8+=) 10...dc4 (10...d4 11.ed4 ed4 12.Nh4–/+) 11.Bc4+= Qc5 (11...Bg4 12.h3 Bh5 13.d3–/+) 12.d3 (12.Qb3 Be4=) 12...Ng4 (12...Rad8 13.Qb3+=) 13.e4 (13.Qc2 Rad8=) 13...Bc8 14.Qb3 Bd7 (14...Qd6 15.h3 Nh6 16.a5=) 15.Ra2 Nf6 (15...Ba5 16.Rd1=) 16.Nbd2 (16.Rc2 Qe7 17.Ne5 Qe5 18.Qb4 Ng4+=) 16...Bg4 (better is 16...Ba5!?=) 17.Ne5!+/– Qe5 A deflection 18.Qb4 c6 (18...Rfd8 19.Rc1+/–) 19.h3 (19.d4 Qf4 20.bc6 bc6+–) 19...c5+/– 20.Qb3 (20.Qb2 Qb2 21.Rb2 Be6+/–) 20...Bd7 (20...Bh5 21.Rc1+/–) 21.f4 (21.Nf3 Qh5 22.e5 Ne8+/–) 21...Qd4 22.Kh1 (22.Kh2 Rad8+/–) 22...Rae8 (22...Qe3 23.e5 Nh5 24.Rf3 Qe1 25.Kh2+–) 23.Nf3 (23.Qd1 Rc8+/–) 23...Qe3 24.Ng5 Re7 25.Rf3 Qc1 (better is 25...Qe1!? 26.Kh2 h6 27.Nf7 Rff7+/–) 26.Kh2+– b6 (26...Nh5 27.b6 a6 28.Rc2+–) 27.Raf2 h6 (27...Qe1 28.e5 Ng4 29.hg4 Bg4 30.Qc2 Bf3 31.Nf3+– (worse is 31.gf3 Qe3 32.Qd2 Qd4+/–)) 28.Nf7 Rff7 29.e5 Bh3?? (29...Qa1+–) 30.ef6 (30.Rh3 Ng4 31.Kg3 Nf2 32.Kf2 Qf4 33.Rf3 Qd2 34.Kg3 Qe1 35.Kg4 Re5 36.Bf7 Kh7–+; 30.gh3 Ne8+–; 30.Kh3?! Qh1 31.Kg3 Nh5 32.Kg4 g6+–; 30.Bf7 Rf7 31.gh3 Ne8+–) 30...Kh8 (30...gf6 31.Rh3 Kg7 32.Bf7+–) 31.fe7 (better is 31.Bf7 Rd7 32.Rg3 Qa1+–) 31...Re7 32.Rh3 Kh7 (32...Re1 33.Qc2 Rh1 34.Kg3 Qe3 35.Rf3 Rh3 36.Kh3+–) 33.Bg8 (33.d4 cd4 34.Rh6 gh6 35.Qd3 Kh8 36.Qd4 Rg7 37.Re2 Qf4 38.Qf4 Kh7 39.Qf5 Rg6 40.Re7 Kh8 41.Qe5 Rf6 42.Qf6) 33...Kg6 (33...Kh8 34.Bf7 c4 35.Qc4 Qc4 36.Bc4 Re8+–) 34.f5 (34.Qd5 Qh1 35.Kh1 Re1 36.Kh2 Re7 37.Rh5 a6 38.Qf5) 34...Kg5 35.d4! cd4 White now must not overlook the idea Kf6. 36.Qg3 Kf6 37.Qg6 (37.Qd6 Re6 38.Qe6 Kg5 39.Qg6) 37...Ke5+– 38.f6 Rb7 39.Qg3 Ke4 40.Rh4 (40.Qg4 Qf4 41.Qf4) 40...Qf4 41.Rhf4 Ke5 42.Rh4 1–0. NN – ChessChampionMarkV, 1985.

3.Bb2?? a6 4.a3 Nd5 5.e4 Nb6 6.a4 ab5 7.ab5 Na4 8.Bd4 e5 (8...d6!?+=) 9.Be5+/– Qg5 (9...Qe7!? 10.Nf3 d6+=) 10.Nf3 Qe7 11.c4 (11.Nc3 d6 12.Nd5 Qd8+–) 11...f6 (11...d6 12.Ra4 Ra4 13.Qa4 de5 14.Nc3+/–) 12.Ra4 (12.Bc7 Qe4 13.Qe2 Qe2 14.Be2 Nb6 15.Ra8 Na8+–) 12...Ra4 13.Qa4 fe5 14.Nc3 g6 (14...Nf6!?+/–) 15.Nd5+– Qd6 16.Be2 (16.Qa7 c5+–) 16...Bh6 (16...Ne7 17.Qa8 Bh6 18.Qb8+–) 17.0–0 (17.d4 ed4 18.Qa7 c5 19.bc6 b6 20.cd7 Bd7 21.Qa8 Kf7+–) 17...c6 (17...Ne7!? 18.Qc2 Nd5 19.cd5+/–) 18.Nb6 Ne7 19.Qa8 0–0 20.Nc8 Nc8 21.Qb7 Bd2? (21...Bf4+–) 22.Rd1 (22.Nd2?! Qd2 23.Bg4 cb5 24.cb5 Nd6 25.Qd7 Ne4 26.Qe6 Kg7 27.Qe5 Nf6+–) 22...Qb4 (22...Qc5 23.Rd2 Nd6 24.Qd7 Ne4+–) 23.Rd2 Rf3 24.Bf3 (better is 24.Qc8!? Rf8 25.Qd7 cb5 26.Qd5 Rf7 27.cb5 Qb1 28.Bf1 Qc1+–) 24...Qd2 25.Qc8 Kg7 26.g3 (26.g3 cb5 27.cb5+–) 1–0. Fournier,Frederic – Chalvet,Philippe, Partie Libre (Active), 1994.

3.Bb2?? d5? (--> 1.b4 d5 2.Bb2 Nc6 3.b5 Nb4).

3.Bb2?? Nd5 4.e3 d6 5.c4 Nb6 6.a4 a6 7.Nf3 ab5 8.ab5 Ra1 9.Ba1 Nf6 10.Be2 e5 11.0–0 Be6 12.d3 h6 13.Nbd2 Qa8 14.Qc2 Qa4 15.Qa4 (15.Nb3 Nbd7+=) 15...Na4= 16.d4 e4 Black fights for the Initiative 17.Ne1 d5 18.c5 Be7 19.Bd1 (19.f3 ef3 20.Nef3 0–0=) 19...0–0 20.Ba4 (20.Nc2 Ra8=+) 20...Ra8 21.Nc2 (21.Bb3 Ra1 22.Nc2 Ra5=) 21...Ra4–/+ 22.Rc1 (22.Bc3!?–/+) 22...Bd7–+ 23.Rb1 Ra2 24.Rb2 Rb2 25.Bb2 Bb5 26.f3 ef3 27.gf3 Kh7 (27...Bd3 28.Nb4 Bf5 29.Kf2–/+) 28.Kf2 Kg6 29.Na3 Bd3 30.Nb3 b6 31.cb6 cb6 32.Nc1 Bc4 33.Nc4 dc4 34.Na2 b5 35.e4 b4 36.d5 Bc5 37.Ke2 Nd7 38.f4 f6 39.Kf3 Nb6 40.Nc1 b3 41.Ne2 Na4 42.Bc3 (42.Ba1–+) 42...Nc3 43.Nc3 Bb4 44.Nb1 c3 (44...c3 45.Nc3 Bc3–+) 0–1. retiponziani (1950) – bakary (2360), ChessWorld.net, 2017.

3.Bb2?? d6? 4.e4+– e5 (better is 4...Nf6 5.a3 e5+–) 5.Bc4?? (5.a3 Nf6+–) 5...g6?? (5...Qh4 6.Nc3 Qg5+=) 6.Nf3 (6.a3 Qh4 7.d3+– (7.ab4?! Qe4 8.Be2 Qg2+/–)) 6...b6? (6...c6 7.Bc3 d5 8.ed5 (worse is 8.Be5 f6–/+) 8...Nd5 9.Be5+/–) 7.h4?? (7.a3 d5 8.Bb3 f6+–) 7...Nf6? (7...d5 8.ed5 (8.Be5?! f6=) 8...f6 9.Nc3+/–) 8.Ng5 (better is 8.a3 d5 9.Bb3+–) 8...h6?? (better is 8...d5 9.ed5 Bd6+/–) 9.Nf7+– (9.Bf7?! Ke7 10.Bg6 hg5+/–) 9...Qd7 10.Nh8 Qe6 (10...Bg7 11.a3 Qg4 12.Qg4 Nc2 (12...Bg4?? 13.Bf7 Ke7 14.ab4+–) 13.Kd1 Bg4 14.Kc2 Bh8+–) 11.Be6 Be6 12.Ng6 Bg4 13.f3 Be6 1–0. guest579 – guest451, ICC, 1999.

3.c4 c5?? 4.a3+– d5 5.ab4 cb4 6.e3 dc4 (6...e5 7.d4+–) 7.Bc4 Nf6 8.Nf3 Qc7 (8...e6 9.Bb2+–) 9.Qb3 (9.d3 e6+–) 9...Be6 10.d3 0–0–0 (10...Bc4 11.dc4 e5+–) 11.Be6 fe6 12.Qe6 (12.Bb2 Nd7 13.Ra7 Nc5 14.Ra8 Kd7 15.Rd8 Kd8+–) 12...Kb8 13.Bb2 Qc2 (13...Rd6 14.Qa2 Qc5 15.Nbd2 Rd3 16.Bd4 Rd4 17.ed4+–) 14.Be5 Ka8 (14...Rd6 15.0–0+–) 15.0–0 (15.Qb6 Qc1 16.Ke2 Qc2 17.Nbd2 Qd3 18.Ke1 Qe2 19.Ke2 Rd2 20.Nd2 a6 21.Ra6 ba6 22.Qa6) 15...Ng4 (15...Qc5 16.Bd4 Rd4 17.Nd4+–) 16.Ra2 (16.Qb6 Qf2 17.Rf2 a6 18.Qd8 Ka7 19.b6) 16...Qb3 (16...Qc5 17.Bd4 Rd4 18.ed4+–) 17.Ra7! Ka7 18.Nbd2 (better 18.Qb3 Ne5 19.Ne5+–) 18...Qe6–+ 19.Ra1 Kb6 20.Nc4 Kb5 21.Nd4 (21.Nd4 Rd4! 22.Ra5 Kc6 23.Bd4–+). GuestTFXC – GuestJVZW, freechess.org, 2019.

3.c4?? d5? 4.a3+– Qd6 (4...e5 5.ab4 dc4 6.Qc2+–) 5.ab4 dc4 6.e3 Qb4 (6...e5 7.Bc4 Qg6 8.Nc3+–) 7.Qa4 (7.Nc3 Nf6+–) 7...Qc5 (7...Qa4 8.Ra4 Bf5 9.Na3+–) 8.Qc4 Qb6 (8...Qd6 9.d4+–) 9.Bb2 Be6 10.Qd4 Rd8 (10...Nf6 11.Qb6 cb6 12.Be2+–) 11.Qb6 cb6 (11...ab6 12.Be5 Rc8+–) 12.Ra7 Bd5 (12...Nf6 13.Nf3+–) 13.Nc3 e6 (13...Nf6 14.Nd5 Nd5 15.Bc4+–) 14.Nd5 Rc8 (14...Rd5 15.Rb7 Ne7 16.Rb6+–) 15.Bc3 (better is 15.Nb6 Rd8 16.Be5 h5+–) 15...Bb4 (15...ed5 16.Rb7 f6+–) 16.Nb6 (16.Nb4 Nf6 17.Bf6 gf6 18.Rb7 Rg8+–) 16...Kd8 (16...Rc3 17.dc3 Bc3 18.Ke2+–) 17.Nc8 (better is 17.Bg7 Rc1 18.Ke2 Kc7+–) 17...Kc8 18.Bg7 Kb8 19.Rb7! Kb7 20.Bc4 (20.Bh8 Ne7+–) 20...Ne7 21.Bh8 Nf5 22.Nf3 (22.Bd3 Kb6+–) 22...Nd6 23.Be2 (23.Bd3 h6+–) 23...Ne4 24.0–0 (24.Bd3 Nd6+–) 24...Kb6 25.d4 (better is 25.Rc1 Ba3 26.Rc6 Kb7+–) 25...Ka5 26.Ra1 Kb6 27.Ra6 Kb7 28.Ne5 Kc7 29.Nf7 Nc3 30.Rc6 Kb7 31.Bf3 (31.Nd8 Kb8 32.Be5 Bd6 33.Bd6 Ka7 34.Ra6) 31...Kb8 32.Be5 Kb7 (32...Bd6 33.Bd6 Kb7 34.Nd8 Ka7 35.Ra6) 33.Rc4 (33.Nd8 Ka7 34.Ra6) 33...Kb6+– 34.Rb4 Nb5 35.Nd6 Ka5 36.Rb5 Ka4 37.Kf1 (37.Bd1 Ka3 38.Nc4 Ka2 39.Bc2 h6 40.Ra5) 37...Ka3 (37...h5 38.Bd1 Ka3 39.Nc4 Ka2 40.Bc2 h4 41.Ra5) 38.Ke2 (38.Ne4 h5 39.Nc3 h4 40.Bd6) 38...h5 (38...Ka4 39.Be4 Ka3 40.Nc4 Ka4 41.Bc6 h6 42.Rb8) 39.Kd2 (39.Ne4 h4 40.Nc3 h3 41.Bd6) 39...Ka2 (39...Ka4 40.Bd1 Ka3 41.Ra5 Kb2 42.d5 Kb1 43.Bc2) 40.h4 1–0. Trkn – phlex, itsyourturn.com, 2000.

3.c4?? e6 4.a3 Nd5 5.cd5 ed5 6.Bb2 d6 7.e3 Bf5 8.Nc3 Nf6 9.Nf3 c5 10.Be2 Be7 11.0–0 0–0 12.a4 a6. gabrielecornacchini – pgaines, net–chess.com, 2001.

3.c4?? g6 4.Bb2 f6 5.a3 e6 6.ab4 Qe7 7.Bc3 Bh6 8.g4 Qd6 9.h4 (9...e5 10.g5+–; 9.Bg2 Bg7+–) 1–0. salmo (1805) – lachezar, internet, 2005.

3.e3 a5 4.c3 Nh6? 5.cb4+– b6 6.Bb2 Nf5 7.Qf3 Bb7 8.Qf5 ab4 9.Nh3 e6 10.Qe5 f6 11.Qf4 Bd6 12.Qh4 0–0 13.Bd3 f5 14.Ng5 h6 15.Qd4 Qg5+/– 16.h4 Qg2+= 17.Kd1?? Qh1–+ 18.Kc2 e5 19.Bc4 Kh8 20.Qd3 Be4 21.Nc3 Bd3 22.Bd3 Qh4 23.Nd5 b3! 24.Kb3 Qa4 25.Kc3 c6 26.bc6 dc6 27.Nb6 Bb4 28.Kc4 Qb5 29.Kb3 Qd3 30.Kb4 Rfb8 31.Be5 Rb6 (32.Kc5 Rb5 33.Kc6 Rc8 34.Bc7 Qd5#) 0–1. solidsteel – LouRoz, Live Game Caissa's Web, 2005.

3.e3 e5 4.Bb2 d6 5.e4 +=.

3.e3 f5 4.c4 (better is 4.e4 e5 5.a3+– (5.ef5 Bc5 6.Nf3 e4=)) 4...Kf7?? (better is 4...a6+=) 5.a3+– e5 6.ab4 Bb4 7.Ba3 Bd6 8.Bd6 cd6 9.Nc3 Nf6 10.d4 Qe7 11.Nf3 Qe6 (11...e4 12.Nd2 Rf8+–) 12.Ng5 Kg6 13.Ne6 Re8 (13...de6 14.de5 de5+–) 14.Nc7 Kf7 15.Na8 Ng4 16.Nc7 +–. hertford – snakeCH, ChessWorld.net, 2002.

3.e4 c5?? 4.a3 1–0. Wall,Bill – HughR, Internet, 2000.

3.e4 c6 4.a3 Qa5 5.c3 e6 (5...Na6 6.ba6 Nf6 7.d3+–) 6.cb4 Bb4 7.Bb2 (worse 7.ab4 Qa1 8.Qc2 Qf6+–) 7...Ba3 (7...Bf8+–) 8.Ra3 Qb4 9.Bg7 Qe4 10.Re3 Qg6 11.Bh8 f6 12.Bd3 Qg2 13.Be4 Qg5 14.Rg3 Qb5 15.Rg8 Ke7 16.Bf6! Kf6 17.Qf3 Ke7 (17...Qf5 18.Bf5 Ke5 19.Qa3 ef5 20.Re8 Kd5 21.Nc3 Kc4 22.Nf3 d6 23.Re3 Be6 24.d3) 18.Qf8 1–0. DEFFM – Guesxxxx, freechess.org, 2019.

3.e4+– f6 4.a3 Nd5 5.ed5 c5 6.Bc4 Nh6 7.d4 f5 (7...Nf5+–) 8.Bh6 gh6 (8...e5 9.de6 gh6 10.Qh5 Ke7 11.Qf7 Kd6 12.Qf5 Qg5+–) 9.Qh5# 1–0. kamret (2190) – superdent, GameColony.com, 2003.

3.a3?? Nd5+=

4.Bb2 c6 5.e4 Nf4 6.Qf3 e5 (6...Ng6 7.d4+=) 7.Bc4 (better 7.Be5 Ne6 8.Nc3+–) 7...g6?? (7...d5 A) worse 8.Be5 Ng6 (worse 8...dc4 9.Bf4 cb5 10.Nc3+–) 9.ed5 cd5–/+ (9...Ne5?! 10.Qe3 f6 11.d4 cd5 12.Bb3=); B) 8.ed5 cd5 9.Bb3= (worse 9.Be5 Ng6–/+)) 8.d4 (better 8.Be5 Ng2 9.Qg2+–) 8...Bh6 (better 8...d5!? 9.Bf1 Ne6 10.ed5 Nd4 11.Bd4 ed4 12.dc6 bc6+=) 9.de5+– d5 (better 9...cb5 10.Bf7! Kf7+–) 10.ed6! cb5 (10...Qd6 11.Bh8 Discovered attack) 11.Bb5 Bd7 12.Nc3 (better 12.Bd7 Qd7 13.Bh8 Qd6+–) 12...Bb5 (12...f6 13.Nge2 Ne2 14.Qe2+– (worse 14.Be2 Qb6 15.Rb1 Qd6+–; 14.Ke2?! Rc8 15.Qd3 Bf4+–)) 13.Nb5 Nf6 (13...Qa5 14.Bc3 Qb5 15.Bh8 Rc8+–) 14.Nc7 Kd7 15.Bf6 (better 15.Ne2 N6h5 16.Na8 Qa8 17.Nf4 Bf4 18.Bh8 Qh8 19.Rb1+–) 15...Qf8 (15...Qf6 16.Rd1 Rad8+–) 16.Rd1 a5 (16...Rc8 17.Bh8 Qh8 18.g3+–) 17.Qg4 Ne6 18.Nf3 Qd6 19.Rd6 Kd6 20.e5 (20.Ne6 fe6 21.Qg3 Bf4 22.Qf4 Kc6 23.Nd4 Kd7 24.Nb5 e5 25.Qe5 Kc6 26.Qd5 Kb6 27.Bd4 Ka6 28.Nc7) 20...Kc7 21.Bh8 Rh8 22.0–0 (better 22.Qh4 Bc1 23.Qe7 Kc8+–) 22...g5 (22...Rc8 23.Qh4 Bf8 24.Qh7+–) 23.Rd1 (better 23.Qh5 Kb8 24.Qh6+–) 23...Nf4 (23...Rd8 24.Qc4 Kb8 25.Rd8 Nd8+–) 24.Qd7 Kb8 25.g3 (25.Rb1 Ne2 26.Kf1 Ng3 27.hg3 b5 28.Rb5 Ka8 29.Qb7) 25...Ne2+– 26.Kg2 g4 27.Nd4 (27.Rb1 gf3 28.Kf1 Ng3 29.hg3 b5 30.Rb5 Ka8 31.Qb7) 27...Nc3 28.Nb5 Nb5 29.Qb5 Rc8 30.Rd7 (30.e6 Bf8 31.Rd7 Rc7 32.Qe5 Bc5 33.Qc7 Ka7 34.Qb7) 30...Be3 31.Qb7 1–0. Agiant – marcoambros, lichess.org, 2020.

4.Bb2 f6 5.c4 Nb6+= 6.e4 d5 (6...e5 7.Nf3+=) 7.cd5 (worse 7.ed5 e6 8.Nc3 Ne7+–) 7...c6? (better 7...f5 8.d3 Nf6+–) 8.bc6+– bc6 9.dc6 Qd6 (9...e5 10.a4 a5 11.Nf3+–) 10.Qc2 Bg4 (10...e5 11.a4 Rb8 12.Nf3+–) 11.h3 Be6 (11...Bh5 12.Ba6+–) 12.Nf3 0–0–0 (12...Nh6+–) 13.Nd4 Kc7 (13...Qd4 14.Bd4 Rd4+–) 14.Nc3 Bc4 15.Bc4 Nc4 16.Ncb5 Kb6 (16...Kb8 17.Qc4 Qe5 18.c7 Kc8 19.Qc6 Qe4 20.Qe4 Re8 21.Qc6 e5 22.Na7) 17.Nd6 Rd6 (17...e6 18.Qb3 Kc7 19.Qb7 Kd6 20.Nb5 Kc5 21.d4 Rd4 22.Bd4) 18.Qb3 Kc5 (18...Kc7 19.Qb7 Kd8 20.Qb8) 19.Qb4 1–0. Janek – Betex, internet, 2018.

4.Bb2 f6 5.e3 b6?? (better is 5...Nb6+=) 6.Qh5+– (6.Qh5 g6 7.Qd5+–) 1–0. Wall,Bill – JoeT, internet, 2004.

4.Bb2 f6 5.e4 Nb6+=.

4.Bb2 Ngf6 5.c4 Nb6 6.c5 Nbd5 7.Qc2 e6 (7...d6 8.e4 Nf4 9.d4=) 8.e4 Nf4 9.g3 (9.d4 d6=) 9...Ng6= 10.Bg2 (10.h4 d5 11.e5 Nd7+=) 10...Be7 (10...d5 11.e5 Nd7 12.d4=) 11.Nf3 (11.h4 d5=) 11...0–0 (11...d6 12.cd6 cd6 13.Nc3=) 12.e5 (12.h4 Nh5=) 12...Nd5 13.d4 (13.Nc3 Nc3 14.Qc3 a6=) 13...d6 (13...a6 14.ba6 ba6 15.h4=) 14.cd6 (14.h4 h5=) 14...cd6 15.0–0 Nc7 (15...Bd7 16.a4=+) 16.a4 (16.Rc1 Nd5+= (worse 16...Nb5 17.a4+–)) 16...b6 (16...Nd5 17.Nc3=) 17.Nbd2 (17.Nfd2 Rb8=) 17...Bb7= 18.Rac1 (18.Ba3 Rc8 19.Nc4 Ne8=) 18...Rc8 19.Qd3 (19.Qb3 f6=) 19...Nd5 (19...de5 20.Rfd1=+) 20.ed6 (20.Ba3 de5 21.de5 Ba3 22.Qa3 Qd7=) 20...Bd6 (20...Qd6 21.Nc4 Qb4 22.Ba3 Qa4 23.Be7 Nde7 24.Nce5=+) 21.Rc8 (21.Ne4 Bc7=) 21...Qc8 22.Nc4 Bb8 (22...Be7 23.Rc1=) 23.Nce5 (23.Rc1 Qd8+=) 23...Ne5 (23...Bd6 24.Rc1 Qa8 25.Ng6 hg6 26.Ba3 Ba3 27.Qa3+=) 24.Ne5 (24.de5!? h6 25.Rc1+=) 24...Nb4= 25.Qb3 Bg2 26.Kg2 (26.Kg2 Nd5 27.Ba3=) 1–0. DEFFM – GuestSHDD, freechess.org, 2016.

4.Bb2 Ngf6 5.e3 d6 6.c4 Nb6 7.Nf3 Bg4 8.h3 Bf3 (8...Be6!? 9.Qc2 Qd7+=) 9.Qf3+/– (worse is 9.gf3 e6=) 9...d5 10.c5 Nbd7 11.c6 bc6 12.bc6 Nb6 13.Be2 Qd6 14.Nc3 Qc6?? (better is 14...a6=) 15.Bb5+– Qb5 (15...Qd7 16.Bd7 Kd7 17.Na4+–) 16.Nb5 Kd7 17.0–0 (17.Qf4 Rc8 18.Na7 Ra8+–) 17...a6 18.Nd4 (better is 18.Bf6!? ef6 19.Nc3 Ke6+–) 18...Nc4 19.Bc3 e6 20.a4 (20.d3 Na3 21.e4 de4 22.de4 Ke8+–) 20...a5 (20...Rb8 21.d3 Ne5 22.Qd1+–) 21.Nb5 (21.Nb3 Bd6+–) 21...Be7 22.Qg3 g6 (22...Ne8+–) 23.Qc7 Ke8 24.Qc6 (24.Qc6 Kf8 25.Qa8 Kg7 26.Qa7+–) 1–0. Thomsen,Jesper – Chlubna,Josef (1695), CZE–DEN, 2011.

4.Bb2 Ngf6 5.e3 e6 6.Nf3 Be7 7.Be2 0–0 8.0–0 Nb6 9.a4 a5 10.c4 d6 11.Nc3 e5 12.d3 Bg4 13.h3 Bh5 14.Ne4 (14.Nd2 Bg6=) 14...Nbd7 (14...Ne4 15.de4 Bf3 16.Bf3 Nc4 17.Bc3+=) 15.Nf6 Bf6 16.Qc2 Bg6 17.Rfd1 Nc5 Black prepares the advance e4 18.Qd2 (better is 18.e4=) 18...Nb3–/+ 19.Qc2 Na1 20.Ba1 Re8 21.Qd2 e4 22.de4 Be4 23.Bf6 Qf6 (23...gf6?! 24.Nd4+=) 24.Qd4 Qg6 25.c5 Re6 26.cd6 (26.b6!? cb6 27.cd6–/+) 26...Rd6–+ 27.Qc4 1–0. Neumann,Frank – Krivosheya,Dmitrij, OP–2012–0–02015, 2012.

4.Bb2 Ngf6 5.Nf3 =.

4.Bb2 Nh6 5.e4+= Nf4 (5...Nb6 6.Nc3+=) 6.a4 (better 6.g3 Ng6 7.Nf3+–) 6...Nf5?? (better 6...d5 7.Ne2 Qd6=) 7.ef5+– Nd5 (7...e6 8.g3 Nd5 9.Nc3+–) 8.Bc4 Nf4 (8...Nf6 9.Nf3+–) 9.Qg4 (9.g3 d5 10.Bb3 Ng2 11.Kf1 Nh4 12.gh4 Bf5+–) 9...e5 (9...d5 10.Qf4 dc4 11.Nf3+–) 10.Be5 f6 (10...d5 11.Qf4 dc4+–) 11.Bf4 Qe7 12.Be3 (12.Ne2 d5 13.Bd5 g5+–) 12...d6 (12...c6 13.Qh5 Kd8 14.Nf3+–) 13.Qh5 (better 13.Nc3 Kd8 14.Nge2+–) 13...Qf7 14.Qf7 Kd8 15.Be6 Be6 16.fe6 Rc8 17.e7! Kd7 (17...Be7 18.Qg7 Deflection (18.Ba7 Zwischenzug)) 18.ef8Q (18.ef8R?!=) 1–0. invictus31 – OriginalFR, lichess.org, 2017.

4.c4 Nb6 5.c5 Nd5+=.

4.c4 Nb6 5.e3 d5 6.cd5 Nd5 7.Nf3 (7.d4 Ndf6=) 7...Bg4 8.d4 e6 9.Bd3 c6 (9...Ngf6 10.e4 Nb6 11.Be3=) 10.bc6+= bc6 (10...Bf3 11.Qf3 bc6 12.Qg3+=) 11.0–0 (11.Qc2 Rc8+/–) 11...f5 (11...Bd6 12.Nbd2+=) 12.Nbd2 (better is 12.Qa4 Bf3 13.Qc6 Kf7 14.Qb7 Be7 15.gf3+/–) 12...Nc3? (better is 12...Bd6+/–) 13.Qc2+– Qa5? (13...Nd5 14.Qc6 Ke7+–) 14.Bb2 Ne2 (14...Qa4 15.Qc3 Nf6 16.Ne5+–) 15.Be2 Rc8 (15...Ne7 16.Bd3+–) 16.Bc4 Ke7 17.Ne5 c5 (17...Qc7 18.Ng4 fg4 19.Ne4+–) 18.Be6! Be2 (18...Ke6 19.Qc4) 19.Bc8 Bf1 20.Qf5 (better is 20.Nc6 Ke8 21.Na5+–) 20...Qd2 21.Nc6 Ke8 22.Bd7 (22.Qd7) 1–0. bostvinnik – cacook, net–chess.com, 2005.

4.c4 Nb6 5.e3 d5 6.cd5 Nf6 7.Bb2 (7.d4 Nfd5 8.Nf3 Bg4=) 7...Nbd5= 8.Nf3 Bg4 9.Be2 Bf3 (9...e6 10.Nc3=) 10.Bf3+= Qd6 11.0–0 e6? (11...e5 12.Qc2+=) 12.d4?? (better 12.e4+–) 12...Qb6 13.Be2 Bd6 (better 13...c6!?+=) 14.Nd2+– 0–0 15.Nc4?? (better 15.e4+–) 15...Qb5= 16.Nd6 Qb2 17.Nc4 Qb5 18.Rb1 Qc6 19.Ne5 Qc3 (19...Qd6 20.Rb7 Qa3 21.Qa1 Qa1 22.Ra1=) 20.Rb3 Qa5 21.Nc4 Qa6 22.Ne5 (22.Nb6 Qb6 23.Rb6 ab6+=) 22...Qd6= 23.Rb7 Qa3 0–1. GuestBQBX – GuestWWCB, freechess.org, 2017.

4.c4 Nb6 5.e3 e5= 6.Bb2 Qe7 7.Nf3 g5? (better 7...e4 8.Nd4 Nf6=) 8.Be5+– g4?? (better 8...Nf6 9.Bc7 Nc4 10.Bc4 d5+–) 9.Bh8 gf3 10.Qf3 f6 (10...Nh6 11.Nc3+–) 11.Bd3 Bh6 (11...Kd8 12.c5! Qc5 13.Bh7 Qc1 14.Qd1+–) 12.Qh5 Kd8 (12...Kf8 13.a4 d6 14.a5+–) 13.Nc3 (better 13.c5 d6 14.cb6 ab6+–) 13...d6 14.Nd5 Nd5 15.Qd5 Qf8 16.Bh7 (better 16.Qd4 f5 17.c5+–) 16...Ne7 17.Qh5 Nf5?? (better 17...Qh8 18.Qh6 Bf5+–) 18.Bf5 Qh8 19.0–0 (19.d4 Bf5 20.Qf5 Bg7+–) 19...Bf5 20.Qf5 Ke7 (20...Bg7 21.d4+–) 21.d4 White prepares the advance c5 (21.Qe4 Kd7 22.Qb7 a6+–) 21...Rg8 (21...Rb8 22.Rac1 Kd8 23.c5+–) 22.d5 (better 22.Qe4 Kd7 23.Qb7 Qg7+–) 22...Qg7 23.g3 Kd8 24.c5! Re8 (24...dc5 25.Rac1 Decoy) 25.cd6 cd6 (25...Qg5 26.dc7 Kc7 27.Rac1 Kd6 28.Qc2+–) 26.Rac1 Ke7 (26...Qd7 27.Qf6 Re7 28.Qh6+–) 27.Rc7 Kf8 28.Rg7 Kg7 29.Rc1 Re5 30.Rc7 Kf8 (30...Re7 31.Re7 Kf8 32.Qe6 Be3 33.Qf7) 31.Qf6 Kg8 32.Qf7 Kh8 33.Qh7 1–0. GuestQCZL – haraguest, freechess.org, 2017.

4.c4 Nb6 5.e3 e5 6.d4 e4 7.Nc3=.

4.c4 Nf4 5.e3 Nh5?? 6.Qh5+– 1–0. GuestQRYP – GuestZLDD, freechess.org, 2017.

4.c4 Ndf6 5.Bb2 d5 6.e3 (6.cd5 Qd5 7.Nc3 Qd6=) 6...Bg4 (6...Bf5 7.cd5 Nd5 8.Nf3=) 7.Be2 (better is 7.f3 Bd7 8.Nc3=) 7...Rb8?? (better is 7...Be2 8.Qe2 dc4 9.Qc4 e6=) 8.Bg4+– Ng4 (8...dc4 9.Be2 Qd5 10.Qa4+–) 9.Qg4 f6 (9...Nh6 10.Qd4 dc4 11.Qc4+–) 10.Nf3 (10.Qh5 g6 11.Qd5 c6 12.Qd8 Rd8+–) 10...Nh6 (10...e5 11.Nc3 c6 12.cd5 cd5 13.Qa4+–) 11.Qe6 (11.Qh5 Nf7 12.Qd5 Qd5 13.cd5 c6+–) 11...c6 (11...dc4 12.Qc4 a6 13.ba6 ba6 14.Bc3+–) 12.0–0 (12.bc6!? dc4 13.Bd4 bc6 14.Ba7 Rb7+–) 12...dc4 (12...Qd7 13.cd5 cd5 14.Qd7 Kd7 15.Rc1+–) 13.Qc4 Qc7 (13...Qd5 14.Qd5 cd5 15.Rc1+–) 14.Nc3 e5 (14...Qd7 15.Qa4+–) 15.bc6 (better is 15.d4+–) 15...e4 (15...Qc6 16.Qb3 b5+–) 16.Nd5 (16.Qe6 Kd8 17.Nd4 Qe7+–) 16...Qd6 (16...Qc6 17.Qe4 Kd7 18.Rac1+–) 17.Qe4 Kd8 (17...Kf7 18.Ne5! fe5 19.Be5 Qe6+–) 18.c7 Kc8 19.Qe8 Qd8 20.Qd8 1–0. Trkn – Steve, itsyourturn.com, 2000.

4.c4 Ndf6 5.Bb2 d6 6.d4=.

4.c4 Ndf6 5.Bb2 Ne4 6.Qc2 Nc5 (6...Nef6 7.e4+=) 7.e3 Ne6 8.Nf3 Nc5 9.d4 Na6?? (better 9...Ne6+–) 10.ba6+– ba6 11.Be2 Rb8 12.Nc3. GuestMXLJ – GuestJGCM, freechess.org, 2017.

4.c4 Ndf6 5.d4 =.

4.c4 Ndf6 5.e3 d5 6.Nf3 dc4 (6...Bg4 7.d4=) 7.Bc4+= h6 (7...Ne4 8.Bb2+=) 8.0–0 g5 (8...e6 9.d4+–) 9.Bb2 Qd6 (9...Bf5 10.d3+–) 10.Ne5 (better 10.e4 Qc5 11.Qb3+–) 10...Bg7? (better 10...Be6+–) 11.Nf7 Rh7 (11...Qc5 12.Qc2 Be6+–) 12.Nd6 ed6 13.Qc2 c6 (13...Ne7 14.Bf6 Bf6 15.Qh7+–) 14.Bg8 d5 15.Qg6 Kf8 16.Qf7 1–0. GuestPDKZ – GuestLPDH, freechess.org, 2017.

4.c4 Ndf6 5.Nf3 h6 6.Nc3 b6 (6...d5 7.d4+=) 7.d4 d6 8.e4 Bg4 9.Be2 a6 10.ba6 Ra6 11.c5 Ra5 12.c6 e6 13.h3 Bh5 14.Nd2 Be2 15.Qe2 (worse is 15.Ne2 Ne7+=) 15...e5 (15...d5!? 16.e5 Nh7+=) 16.d5 g5 17.Nb3 Ra7 18.a4 Ne7 19.Nb5 Ra8 20.f3 (20.Bd2!? Bg7+–) 20...Nc8 21.Be3 Nh5 22.Kf2 Ne7 (22...f5 23.ef5 Nf4 24.Bf4 gf4 25.N3d4+–) 23.Rhb1 (23.a5 ba5 24.Na5 Nd5+–) 23...Nf4 24.Qc4 h5 (better is 24...f5!?+/–) 25.a5+– g4 26.ab6 Ra1 27.Ra1 gh3 (27...cb6 28.c7 Qd7 29.Ra8 Nc8 30.Rc8 Qc8 31.Qc6 Ke7 32.Qd6 Ke8 33.Qc6 Ke7 34.d6 Kf6 35.d7 Bd6 36.Nd6 g3 37.Kg1 Ne6 38.dc8Q Rc8 39.Nc8 Kg6 40.Ne7 Kg7 41.c8Q Kf6 42.Q6e6 fe6 43.Qf8) 28.Nc7 Qc7 29.bc7 (better is 29.Ra8 Nc8 30.b7 Ke7 31.Rc8 Qb8 32.Rb8 h2 33.Re8 Kf6+–) 29...Nc8 30.Qa6 hg2 31.Qc8 Ke7 32.Qd8 1–0. algernon (2495) – valerypavlovich (2110), net–chess.com, 2016.

4.e3 Nb6 5.c4 Nf6 6.a4 (better 6.d4=) 6...Ne4?? (better 6...d5=+) 7.a5 Nd5 (better 7...Nc4 8.Bc4 d5+–) 8.cd5 Nd6 9.Nf3 e6 10.de6 de6 11.Bb2 a6 12.ba6 ba6 13.Nc3 Bd7 14.Be2 Bb5 (14...Be7 15.0–0+–) 15.Nb5 ab5 16.0–0 Nc4 (16...c5 17.Qc2 c4 18.Bc3+–) 17.Bc3 (17.Bc4 bc4 18.Ne5 Be7+–) 17...Nb2 (17...Qd5+–) 18.Bb2 (18.Bb2 c6 19.Ne5+–) 1–0. GuestLFPF – GuestQGVM, freechess.org, 2017.

4.e4 Nb6 5.a4 d5 6.a5 Nc4 7.ed5 (7.Ra4 e6+=) 7...Qd5 8.Nc3 Qe5 (8...Qe6 9.Qe2+=) 9.Qe2 Qe2 10.Be2 Be6 (10...Nd6 11.Nd5 Kd8 12.Nf3+=) 11.a6 ba6 (11...b6 12.Nf3 Na5 13.Ba3+–) 12.Ra6+– Nb6 (12...Nd6 13.Bf3 Rb8 14.Bc6 Bd7 15.Ra7+–) 13.Bf3 Rd8 (13...Rc8 14.Ra7 Bd7 15.Nge2+–) 14.Ra7 Nc4 (14...Rc8 15.d3+–) 15.Rc7 Nd2 (15...Ne5+–) 16.Bc6 (16.Bd2 Bd7+–) 16...Bd7 17.Rd7 Rd7 18.Bd2 e5 (18...e6 19.Na4+–) 19.b6 (19.Nf3 f6+–) 19...Ne7 20.Bd7 Kd7 21.Nf3 Nc6 22.0–0 Bc5 23.b7 (23.Be3 Be3 24.fe3 f5+–) 23...Re8 (23...Rb8 24.Rb1+–) 24.Rd1 e4 (24...Kc7 25.Rb1 Rb8 26.Nd5 Kd6+–) 25.Bf4 Ke7 (25...Ke6 26.Ng5 Ke7 27.Nd5 Kf8 28.Nh7 Kg8 29.Nhf6 gf6 30.Nf6 Kh8 31.Ne8+–) 26.Ne4 Rd8 (26...Ba7 27.Nd6 Bb8 28.Re1 Kd7 29.Re8 Bd6 30.Bd6 Kd6+–) 27.Rd8 Kd8 28.Nc5 Ke7 29.b8Q (better 29.Be5 f6 30.Nd4 fe5 31.Nc6 Kd6 32.b8Q Kc5+–) 29...Nb8 30.Bb8 Kf6 31.Nd4 (31.Ne4 Ke7+–) 31...g5 32.f4 h6 33.Be5 Kg6 34.f5 Kh5 35.Ne4 g4 36.g3 f6 1–0. DEFFM – GuestCFRT, freechess.org, 2018.

4.e4 Nb6 5.a4 d6 6.Nc3+=.

4.e4 Nb6 5.a4 d6 6.Nf3 +=.

4.e4 Nb6 5.c4 e5 6.Bb2 d6 7.c5 (7.d4 Nf6+=) 7...Nd7 (7...dc5 8.Be5 Qe7 9.d4=+) 8.c6 bc6 9.bc6 Nb8 (9...Nc5 10.Nc3=+) 10.Bb5 Ne7 11.Qa4 Be6 12.Nc3 f6 (12...a6 13.Rd1=) 13.h3 (13.Nge2 d5 14.d4 de4 15.de5 f5+/–) 13...Bf7 (13...a6 14.d4 ed4 15.Nce2 ab5 16.Qa8 Nbc6 17.Qd8 Kd8 18.Nf3=) 14.Bc4 (14.Nge2 f5+=) 14...Nbc6 (14...Bc4 15.Qc4 Nbc6 16.Nf3=) 15.Bf7 Kf7 16.Qc4 Kg6 17.Nf3 Rb8 18.Rb1 Rb7 19.0–0 Qb8 20.Ba1 Kh6 21.Qa6 Rb6 22.Rb6 Qb6 23.Qb6 cb6 24.Rb1 g5 25.Nb5 d5 26.Rc1 (better is 26.Nd6!? de4 27.Ne4=+) 26...de4–+ 27.Nh2 Kg6 28.Ng4 (28.Nd6–+) 28...Bg7 29.Rc4 f5 30.Ne3 Rd8 31.Rc6?? (31.g4 Nd4 32.gf5 Nef5 33.Bd4 Nd4 34.Na7–+) 31...Nc6 32.Nc4 a6 (33.Nc3 b5–+) 0–1. Heat – arena, Live Game Caissa's Web, 2004.

4.e4 Nf4 5.d4+= c6?? (better is 5...Ng6+=) 6.Bf4+– Qa5 (6...cb5 7.Nf3+–) 7.Qd2 b6 (7...Qb6 8.Nc3+–) 8.Nc3 (8.Qa5!? ba5 9.bc6 dc6+–) 8...g6 (8...e6 9.Nb1+–) 9.Nf3 (better is 9.bc6 dc6 10.Nf3+–) 9...c5 (9...e5 10.de5 Bb4 11.ab4 Qa1 12.Nd1+–) 10.dc5 (better is 10.Nd5!? Qd2 11.Kd2 Bb7 12.Nc7 Kd8 13.Na8 Ba8+–) 10...bc5 (10...Bg7 11.Be5 Be5 12.Ne5 bc5 13.Nd5 Qd2 14.Kd2+–) 11.Nd5 Qa4 (11...Qd2 12.Kd2 Bh6 13.Bh6 Nh6 14.Nc7 Kd8 15.Na8+–) 12.Ne5 (better is 12.Nc7 Kd8 13.Ng5 d6 14.Na8 Nh6+–) 12...Qe4 13.Be2 Qg2 (13...Bg7 14.Nc7 Kf8+–) 14.Bf3 (14.Nc7 Kd8 15.Nf7) 14...Qh3 15.Nc7 Kd8 16.Nc6 1–0. mangue – Toddo, ChessWorld.net, 2002.

4.e4 Nf4 5.d4 Ne6 6.Bc4 a6 7.ba6 ba6 (7...b5 8.Bb5 c5 9.Bc4 Nd4 10.Ne2+=) 8.Nc3 Bb7 (8...c6 9.Be6 de6 10.Nf3+/–) 9.Rb1 Qc8 10.Be3 d6 11.Nf3 Nf6 12.d5 Nc5? (better is 12...Nd8+/–) 13.Bc5+– dc5 14.e5 (better is 14.Bb3!? e6 15.Ba4 Ke7+–) 14...Nd7 15.0–0 (15.Na4!? Rb8+–) 15...Nb6+/– 16.Qd3 f6 (16...Qg4 17.e6 f6 18.Ne4+–) 17.Ne4 (better is 17.Rfe1+–) 17...Qf5?? (better is 17...e6 18.de6 Be7+–) 18.Nf6! Qf6 (18...gf6 19.Qf5) 19.ef6 gf6 20.Rfd1 0–0–0 (20...Bg7 21.d6! Rd8 22.Qe2 Rd6 23.Rd6 cd6 24.Rb6+–) 21.Ba6 Rd5 22.Bb7 Kb7 23.Qd5 c6 (23...Kb8 24.Qd8 Ka7 25.Qc7 Ka8 26.Rd8 Nc8 27.Rc8#) 24.Qd7 Ka6 25.Qc6 Ka5 (25...Ka7 26.Qb6 Ka8 27.Rd8#) 26.Qb5# 1–0. marekt – drunkball, ChessWorld.net, 2002.

4.e4 Nf4 5.d4 g5 6.h4+– Bh6? (better 6...Bg7 7.hg5 Ne6+–) 7.hg5 Bg5 8.Nf3 d6 (8...f6+–) 9.Ng5 b6 (9...e5 10.Bf4 ef4+–) 10.Bf4 Nh6 11.Rh6 d5 12.Qh5 Rf8 13.Nh7 Rg8 14.Ng5 Be6 15.Ne6 Qd7 16.ed5 a6 17.Rh8 Qd5 (17...Qe6 18.de6 0–0–0 19.Qe5 Rd6 20.Rg8 Kb7 21.ef7 Rd7 22.f8Q Rd8 23.Qd8 ab5 24.Qa8) 18.Rg8 Kd7 19.Qd5 1–0. Panza (2690) – forty8 (1635), ChessWorld.net, 2005.

4.e4 Ndf6 5.e5 Ng4?? 6.d4 (better 6.Qg4 d6 7.Qe2+–) 6...d6 7.h3 (7.Be2 Qd7+=) 7...N4h6 8.Bh6 (8.Nf3 Bf5+=) 8...gh6 (8...Nh6 9.Nf3=) 9.ed6 (9.Nf3 de5 10.Ne5 Nf6+–) 9...cd6 10.Nf3 e5 (10...Nf6+=) 11.d5 (11.de5!? Bg7 12.Bc4+–) 11...e4 (11...Nf6 12.c3=) 12.Nd4 Nf6 13.Nd2 Nd5 (13...Qa5 14.c4=) 14.c4 (better 14.Ne4 Bg7 15.Qd3+=) 14...Nc3?? (better 14...Nf6=+) 15.Qc2+– e3 16.Qc3 (16.N2f3 e2 17.Be2 Ne2 18.Qe2 Qe7+–) 16...ed2 17.Qd2 (17.Kd2 Bg7 18.Qe3 Kf8+–) 17...Bg7+= 18.0–0–0 Be6? (better 18...0–0!?+=) 19.Ne6+– fe6 20.Qd6 Qd6 21.Rd6 Ke7 22.Rd2 a6 23.b6 Rac8 24.Rc2 (24.g3 Rc6+–) 24...Rhf8 25.f3 (better 25.Bd3 Rc6 26.Re1+=) 25...e5? (better 25...Rc6+=) 26.Bd3+– Rh8 (26...Rc5 27.Kd2+–) 27.Re1 Kf6 (27...Rc5 28.Be4+–) 28.Be4 h5 (28...Bf8 29.a4 (29.Bb7?! Rb8 30.c5 Rb7+–) 29...a5 30.Rd1 Ba3 31.Kb1+–) 29.Bb7 Rb8 30.Ba6 Rb6 31.Bb5 Rd6 (31...Ra8 32.a4+–) 32.a4 (32.c5 Bh6 33.Kb2 Rd2+–) 32...Bh6 (32...Rhd8 33.c5 Bh6 34.Kb2+–) 33.Kb2 e4 (33...Rd2 34.c5+–) 34.Re4 Bg7 (34...Rd2 35.a5+–) 35.Kb3 h6 (35...Re6 36.Rd4+–) 36.c5 Rdd8 (36...Re6 37.c6 Rc8 38.c7+–) 37.c6 Rc8 38.a5 (38.c7 Kf7+–) 38...Bf8 (38...Rc7 39.a6+–) 39.a6 (39.c7 Bd6 40.Rc6 Rc7 41.Rd6 Kg7+–) 39...Rb8 (39...Rh7 40.Rce2 Rhc7 41.Kc4+–) 40.Ka4 Bd6 41.Rce2 (41.c7 Rbc8 42.Rc6 Rc7 43.Rd6 Kg7+–) 41...Bc5 (41...Bg3 42.Re6 Kg5 43.Bd3+–) 42.Re6 Kf5 (42...Kg7 43.c7 Rbc8 44.Rc6+–) 43.R2e5 (43.g3 Be3 44.R2e3 Rb5 45.Kb5 Rb8 46.Kc5 Rb5 47.Kb5 h4 48.R3e5) 43...Kf4+– 44.Rc5 Kg3 45.Re2 (45.Rg6 Kf4+–) 45...Kh2 46.Rce5 (better 46.c7!? Ra8+–) 46...Rhf8 47.c7 Rf4 48.Ka5 Rb5 49.Kb5 Rg4 50.c8Q (50.hg4 h4 51.c8Q h3 52.Qc7 Kg1 53.gh3 Kf1 54.Qc1) 50...Rg6 51.a7 (51.g3 Kg3 52.Qc2 Rb6 53.Kb6 Kf4 54.Qc4 Kg3 55.Rh5 Kf3 56.Qg4) 51...Rg7 (51...Ra6 52.g3! Kg3 53.Qg8 Kf4 54.R5e4 Kf5 55.Qf7 Rf6 56.Qh5) 52.a8Q Kg3 (52...Rg6 53.g3! Kg3 54.Rh5 Rb6 55.Kb6 Kf4 56.Qc7) 53.Qg8! Rg8 (53...Rg8 54.Qg8 Mate attack) 54.Qg8 (54.Qg8 Kh2 55.g3 Kg1 56.Qd5 h4 57.Qd1) 1–0. Dino_Jarach (1835) – LjulianR, LaUNCenCasa Arena, 2020.

4.g3 e5 5.Bg2 Nb6 6.Bb2 =.

4.g3 Ngf6 5.Bg2 (better is 5.c4 Nb6 6.c5=) 5...Nh5?? (better is 5...e5=) 6.Bd5+– e6 (6...Nf6 7.Bg2+–) 7.Bf3 (7.Bg2 Nf6+–) 7...Nf6 8.Bb2 (8.e4 d5 9.e5 Nd7+–) 8...d5 9.d3 (9.c4 dc4 10.Qa4 Bd6+–) 9...d4 (9...a6 10.ba6 Ra6 11.c4+–) 10.c3 e5 (10...dc3 11.Nc3 Bd6 12.Ne4+–) 11.Nd2 (11.cd4 ed4 12.Nd2 Bc5+–) 11...dc3 (11...Bc5 12.cd4 Bd4 13.Bd4 Qd4 14.Rc1+–) 12.Bc3 Nd5 (12...Nd7 13.Nc4+–) 13.Be5 Bd6 (13...Be6 14.Ne4+–) 14.Bg7 Rg8 15.Bd5 Rg7 16.Qb3 Bd7 (16...Qf6 17.Rc1 a6+–) 17.Bf7 (better is 17.Qc3 Kf8 18.Bb7+–) 17...Rf7 18.Ne4 Bb5?? (18...Qe7+–) 19.Qb5 Rd7 (19...c6 20.Qh5 Be7 21.Nf3+–) 20.Qh5 (20.Nf3 Kf8+–) 20...Ke7 (20...Kf8 21.Qh6 Rg7 22.Rb1+–) 21.Qg5 (21.Qh7 Kf8 22.Qh6 Rg7+–) 21...Ke8 (21...Kf8 22.Qh6 Rg7 23.Nf3+–) 22.Nf6 (better is 22.Qg8 Ke7 23.Qh7 Kf8 24.Qh6 Ke7 25.Qg7 Ke6 26.Ng5 Kd5 27.Qg6+–) 22...Kf8 (22...Kf7 23.Qf5 Qf6 24.Qd7 Kg8+–) 23.Qg8 Ke7 24.Qg7 (24.Nd5) 24...Ke6+– 25.Nd7 Be7 (25...Qg8 26.Qg8 Rg8 27.Rb1+–) 26.Qg4 Kf7 27.Nf3 Ke8 28.Nfe5 b5 29.Qg8 (29.Qh5) 29...Bf8 30.Qf8 1–0. BorisOwl – JIZZOSH, gamecolony.com, 2000.

3.c3?? Nd5

4.Bb2 Nb6 5.e4 =.

4.Qb3 e6 5.Na3 (5.e4 Ndf6 6.e5 Ne4=) 5...b6 (5...Ndf6 6.Nf3+=) 6.Nf3 Nf4 (better is 6...Bb7=) 7.Ng5?? (better is 7.d4 Ng6 8.e4+=) 7...Qg5–+ 8.Qa4 (8.g3 Ng6 9.Bg2–+) 8...Bb7 (8...Ng2 9.Kd1 Bb7 10.f3–+) 9.f3 (9.Rg1 Nh3! 10.d4 Qg6–+) 9...Ng2 10.Kf2 (10.Kd1–+) 10...Bc5 (10...Nf4 11.h4 Qf6 12.Ke1–+) 11.e3 (11.d4 Nf4 12.h4 Qf6 13.dc5 Nd3 14.Ke3 Nc5–+) 11...Nf6 (better is 11...Nf4 12.h4 Qf6–+) 12.Qg4?? (12.Bg2 a6 13.Qb3 Qh4 14.Kf1 Bd5–+) 12...Qg6 (better is 12...Ng4 13.Ke2 Nh4–+) 13.Qa4?? (better is 13.Qg6 hg6 14.Bg2–+) 13...Qg5 (better is 13...Bf3 14.Kf3 Ne4–+) 14.Bg2?? (14.Qg4 Ng4 15.Ke2–+) 14...h5 (14...a6 15.Qd1–+) 15.Rb1 (15.d4 Qh4 16.Kf1 a6–+) 15...Qd5 (15...a6 16.h4 Qf5 17.Qb3–+) 16.Qc4 (16.Qb3 a6–+) 16...Qc4 (16...Qf5!? 17.Ke2–+) 17.Nc4 Bd5 (17...a6 18.a4–+) 18.d3 (18.Bf1 0–0–0 19.d4 Be7+=) 18...c6 (18...a6 19.a4–+) 19.Rb3 (19.bc6!? dc6 20.f4–+) 19...h4 20.Ne5? (better is 20.h3–+) 20...Bb3 21.ab3 h3 (21...cb5!? 22.Ng4–+) 22.Bf1 cb5 23.d4 Bd6 24.b4 (24.Bb5 Rh5–+) 24...a5 (24...Rh5 25.Rg1–+) 25.ba5 Ra5 26.Bd2 (26.e4 Ra2 27.Ke3 b4–+) 26...Ra1 (better is 26...Ra2 27.Ke1 Bc7–+) 27.Bg2 (27.Rg1 Ra2 28.Ke1–+) 27...Ra2 (27...hg2?! 28.Ra1 Rh2 29.Rg1–+) 28.Rd1 Nd5 (better is 28...hg2 29.Kg1–+) 29.e4 (29.Bh1 Nc3 30.Ke1 Nd1 31.Kd1–+) 29...Nc3 30.Rc1 (30.Bf1 Nd1 31.Ke1 Ra1–+) 30...Rd2 31.Ke3 Rg2 (31...Rd1!? 32.Rc2 Be5 33.de5–+) 32.Rc3 Rh2 (better is 32...Rh5–+) 33.Rc8 Ke7 34.Rh8 Be5 35.de5 b4 (35...Rh1 36.Kf4–+) 36.Rb8 (36.f4–+) 36...b3 37.Rb6 b2 38.f4 Rc2 39.Rb8 h2 40.Kd3 h1Q 41.Kc2 Qc1 42.Kb3 b1Q 43.Ka4 Qb8 44.f5 Qa1 0–1. rcarvalho – rcris, net–chess.com, 2004.

4.e4 Nb6 5.a4 (5.d4 Nf6 6.Bd3 d5+=) 5...d5 6.a5 Nc4 7.d4 Nf6 8.e5 Ng8 9.Bc4 (9.Qb3 Be6+=) 9...dc4 10.Nf3 a6 (10...Qd7 11.Na3+=) 11.ba6 Ra6 12.Qa4 c6 Exerts pressure on the isolated pawn 13.0–0 Bg4 14.Nbd2 b5 15.Qa3 (15.Qb4 e6 16.Qb2 Ra5 17.Ra5 Qa5+=) 15...e6= 16.Qa2 Be7 17.h3 Bf5 18.Bb2 (18.Rd1 Nh6=) 18...c5 (18...Nh6 19.Bc1+=) 19.Rfd1 (19.dc5 Bd3 20.Rfd1 Qc7=) 19...Qc7 20.Nf1 (20.dc5!? Bc5 21.Bc1=) 20...cd4+= 21.Rd4 Nh6 (21...Bd8 22.Ne3 Ne7 23.Rad1+=) 22.Ne3 (22.Bc1 Bc5 23.Bh6 Bd4 24.Bg7 Bc3–+) 22...Bd3 23.Rf4 (23.Bc1 Bd8+=) 23...0–0 (better is 23...Bd8–/+) 24.Ng4? (24.Rd4 Rfa8 25.Rd3 cd3–+) 24...Ng4–/+ 25.Rg4 Rfa8 26.Ng5 (26.Nd4 Ra5 27.Nb5 Ra2 28.Nc7 Ra1 29.Kh2–+) 26...Ra5 (26...Qa5?! 27.Qa5 Ra5 28.Ra5 Ra5 29.Bc1–+; 26...Qe5?! 27.Nf3 Qc7 28.Rd4–+) 27.Qa5 Ra5 (27...Qa5?! 28.Ra5 Ra5 29.Bc1–+) 28.Re1 (28.Ra5 Qa5 29.Ne4 b4–+) 28...Ra2 29.Bc1 Qa5 30.Bf4 (30.Nf3 Qc3 31.Bh6 Bg6–+) 30...Bc5 (30...Bg5!? 31.Rg5 h6 32.Rg3 Qc3 33.Rc1–+) 31.Kh2 Bf2 32.Bg3 (32.Rc1 h5 33.Rg3 Bg3 34.Kg3 Qb6–+) 32...Be1 33.Be1 Qc7 (33...b4 34.cb4 Qe5 35.Bg3–+) 34.Bg3 Rc2 35.Rf4 Qe5 (better is 35...Rc3 36.Rf7 Qc6 37.Be1–+) 36.Nf7 (36.Rc4 Rg2! 37.Kg2 Qe2 (37...Bc4?! 38.Be5 f6 39.Bf4–+) 38.Bf2 Bc4–+) 36...Qc3 37.Nd6 Qb2 38.Nc8 The mate threat is Ne7 38...Rg2 39.Kh1 g5 (39...Rg3?? 40.Ne7 Kh8 41.Rf8) 40.Rg4 c3 (40...b4!? 41.Be5 Qe2 42.Rg2 Qe1 43.Kh2 Qe5 44.Kh1–+) 41.Rg5 Kf7 42.Nd6 Kf6 43.Rg8 c2 44.Bh4 Ke5 45.Rg2 c1Q 46.Kh2 Qb4 (better is 46...Qba1 47.Nf7 Kd5 48.Rg4–+) 47.Bg3 Kf6 (47...Kd5 48.Rg1 Qbd2 49.Kh1–+) 48.Rf2 Kg6 49.Rf8 Qcb2 50.Rf2 Qg7 (50...Qf2! 51.Bf2 Qd6 52.Kg1–+) 51.Ne8 Qd7 52.Rf4 Qd2 53.Rf2 Qc3 54.Rf6 Kh5 55.Rf8 Qe7 56.Nf6 Kg6 (56...Qef6 57.Rf6 Qf6 58.Kg1–+) 57.Rg8 Kf7 58.Bh4 Qcc7 59.Rg3 b4 (59...Qb4 60.Ng4–+) 60.Nd5 Qc2 61.Rg2 Qg2! 62.Kg2 Qh4 63.Nb4 Qb4 64.Kg3 Qd6 65.Kg2 Be4 66.Kf2 Qf4 67.Ke2 e5 68.h4 Bf3 69.Kf2 Kf6 70.h5 Bh5 71.Ke1 Qe3 72.Kf1–+ Be2 73.Kg2 Qf3 74.Kh2 Bf1 75.Kg1 Qg2 0–1. SuperForte – REXChess, 1994.

4.e4 Nf4 5.d4 d5?? (better is 5...Ng6+=) 6.Bf4+– de4 7.Nd2 f5 (7...Nf6 8.Bc4+–) 8.Be2 (better is 8.Bc4+–) 8...h6 (8...Nf6 9.Nh3+–) 9.f3 (better is 9.Bh5 Kd7 10.Nc4+–) 9...g5 10.Be5 Rh7 (10...ef3 11.Ngf3 (11.Bh8?! fg2 12.Bh5 Kd7+–) 11...Nf6 12.0–0+–) 11.fe4 fe4 (11...Nf6 12.Bf6 ef6 13.Bh5 Ke7 14.Bg6+–) 12.Ne4 (12.Bh5!? Kd7+–) 12...Qd5 (12...Nf6 13.Qd3 Rf7 14.Bf6 ef6 15.Bh5+–) 13.Bd3 (better is 13.Bh5 Kd8 14.Qf3 Nf6 15.Nf6 Qf3 16.Nf3 ef6 17.Bf6 Be7+–) 13...c6 (13...Rf7 14.Bc7 Bf5 15.Qe2+–) 14.c4 Qe6 (14...Qf7 15.bc6 bc6 16.Nc5+–) 15.Qh5 (better is 15.Nc5 Qf7 16.bc6 b6+–) 15...Rf7 (15...Qf7 16.Ng3 Qh5 17.Nh5+– (17.Bh7 Qf7 18.Bd3 cb5+=)) 16.Nc5 Qf5 (16...Qg4 17.Qg4 Bg4+–) 17.Bf5 Bf5 18.g4 (18.bc6 bc6 19.Ne2 Nf6 20.Bf6 ef6+–) 18...Bc2 19.Ne2 (better is 19.bc6 b6 20.Nd7 Bd3+–) 19...a5 20.Rf1 Nf6 21.Bf6 ef6 22.Rf6 Rd8 23.Qf7 1–0. Shadrack – Meggy, ChessWorld.net, 2009.

4.e4 Ndf6 5.d3 =.

4.Bb2 Ndf6

5.c4 d6 =.

5.Nf3 d6 6.c4 =.

5.Nf3 d6 6.d4 =.

5.Nf3 e6

6.c4 d5 7.e3 Bd6 8.Be5 =.

6.c4 d5 7.e3 Bd7 8.Qb3 dc4 (8...a6 9.cd5 Nd5 10.Nc3=) 9.Bc4 Bd6 (9...c6 10.Ne5=) 10.d4 (10.0–0 c6+=) 10...Ne7 11.0–0 0–0 12.Nc3 c5 (12...c6 13.Ne5+=) 13.bc6 (13.dc5 Bc5 14.Na4 Bd6+/–) 13...Bc6 (13...Nc6 A) 14.Qb7? Na5 15.Qa6 Bc8–+ (15...Nc4 16.Qc4 Rb8 17.Rab1+=); B) 14.Bd3=) 14.Ne5 Qc7 (14...Rc8 15.Rfc1=) 15.Nb5+= Bb5 16.Bb5 Be5 (16...Ned5 17.Rfc1 Qe7 18.Nc4+=) 17.de5 Ng4 18.f4 (18.Rfc1 Nc6+=) 18...Nf5= 19.e4 (19.Bd4 Rfc8=) 19...Qb6+= 20.Kh1 Nfh6 (20...Nh4 21.Qg3 Ne3 22.Ba3=) 21.Ba3 Rfd8 22.Qb2 (22.Be7 Rd2 23.Bh4 a6=) 22...Ne3 (22...a6 23.Ba4 Qb2 24.Bb2+=) 23.Rf3 (23.Rfc1!? Nhg4 24.Bc5+=) 23...Nhg4+= 24.Qe2 (24.Ba4!?+=) 24...Rac8 (24...a6 25.Be7 Qb5 26.Qb5 ab5 27.Bd8 Rd8 28.h3–/+) 25.Be7 Qd4 (25...Rd4 26.Rb1–/+ (26.Re3? Ne3 27.a3 a6–+)) 26.Rg1–+ Rc2 27.Qe1 Nd1 (27...Qe4 28.Qg3 Rdd2–+) 28.Rgf1+= Qd2 (better is 28...Rc1!? 29.Bh4 Rdc8–/+) 29.Qg3+= Ngf2 30.R3f2 Nf2 31.Rf2 Qf2 32.Qf2 Rf2 33.Bd8 Rd2 Threatening mate... how? (33...Rd2 34.Bb6 ab6–+; 33...Ra2?! 34.Kg1=) 0–1. NN – COMP, 1992.

6.c4 d5 7.e3 Bd7 8.Qb3 dc4 (8...c6 9.bc6 Bc6 10.Nc3=) 9.Bc4 Bd6 10.d4 (10.0–0 c6=) 10...Ne7 (10...c6 11.Nc3=) 11.0–0 0–0 12.Nc3 c5 (12...c6 13.Rfc1+=) 13.bc6 (13.dc5!? Bc5 14.Rfd1+=) 13...Bc6 14.Ne5 Qc7 (14...Rc8 15.Nb5 Bb5 16.Bb5=) 15.Nb5+= Bb5 16.Bb5 Be5 (16...Ned5 17.Rac1 Qe7 18.Rc4+=) 17.de5 Ng4 18.f4 (18.Rfc1 Nc6 19.Rc5 Rfd8+/–) 18...Nf5= 19.e4 (19.Bd4 Rfc8=) 19...Qb6 20.Kh1 Nfh6 (20...Nh4 21.g3 Nf2 22.Rf2 Qf2 23.gh4 Qf4 24.Be2+=) 21.Ba3 Rfd8 22.Qb2 Ne3 (22...a6 23.Ba4 Qd4 24.Qd4 Rd4 25.Bc2=) 23.Rf3 (23.Rfc1 Rac8 24.Rc8 Rc8+=) 23...Nhg4 24.Qe2 (24.Rc1!?=) 24...Rac8 (better is 24...a6 25.Bd3 Qd4–+) 25.Bd6?? (25.Be7 Qd4 26.Rg1 Rc2–+) 25...Qd4?? (25...Rc2 26.Qd3–+) 26.Re1 Rc2 27.Qd3 Qd3 28.Bd3 Rg2 (better is 28...Ra2!? 29.h3 Ng2–+) 29.Rfe3 (29.Ree3 Ne3 30.a3 Rg4=) 29...Ne3 30.Re3 (30.a3 Nc2 31.Rb1 Rd2 32.Bc2 Rc2 33.Rb7 a6–+) 30...Ra2+= 31.f5 Rd2 32.Rg3 (32.Bc4 Rc8 33.Rd3 Re2+=) 32...g6 (32...Rc8 33.Rf3–/+) 33.fe6 (33.Bf1 ef5 34.ef5 Rc8+=) 33...fe6 (33...Rd1 34.Kg2 fe6 35.Bc4=) 34.Bc4 Kf7 (better is 34...Re8+=) 35.Rf3+/– Kg7 36.Be6 Kh6? (36...Re8 37.Rf7 Kh6 38.Bf8 Rf8 39.Rf8 b6+–) 37.Bd5?? (37.Bf8!? Rf8 38.Rf8+/–) 37...Rc8 (better is 37...b6!?=) 38.Bf8+/– Kg5 Threatening mate: Rc1 39.Be7 Kg4?? (39...Kh6 40.Rh3 Kg7 41.Bf6 Kf8–/+) 40.Rg3+– Kh5 (40...Kf4 41.Bg5 Ke5 42.Bd2+–) 41.Rh3 Kg4 Do you see the mate threat? 42.Be6 Kf4 43.Bc8 Ke5 44.Re3 (better is 44.Bg5!? Rd1 45.Kg2 h6 46.Rh6 b6+–) 44...b5 (44...Rc2 45.Bh3+– (45.Bb7?! Rc7+–)) 45.Bf8 (45.Rb3!? Ke4 46.Bb7 Kd4 47.Rb5 Ra2+–) 45...a5 46.Bg7 Kf4 47.Re1 b4 (47...a4 48.Bh6 g5 49.h4+–) 48.e5 b3 (48...Rd8 49.Rf1 Ke3 50.Bh6 Ke4 51.Re1 Kf3 52.Bb7 Kg4 53.Bc6+–) 49.e6 (better is 49.Bh6 g5 50.h4+–) 49...a4 50.e7 Ra2 51.e8Q Rh2 52.Kh2 Kf3 (52...Kg5 53.Qe5 Kh4 54.Re4) 53.Qe4 (53.Qe3) 53...Kf2 54.Bd4 1–0. NN – COMP, 1993.

6.c4 d5 7.e3 Bd7 8.cd5 Nd5 9.e4 Nf4 =.

6.e3 d5 =.

3.c4?? a6

4.a3 ab5 5.Bb2 Na6 6.cb5 Nc5 =.

4.a3 e5?? 5.ab4+– Bb4 6.Bb2 d6 7.e4 Nf6 8.f3 c5 9.Nc3 (9...0–0 10.Qc2+–; 9.Bc3 0–0+–) 1–0. 1805DYDIDIDY – derDude@, mySchach.de, 2005.

4.Qa4 e5 5.Bb2 +/–.

3.c4?? d6?

4.a3 c5 5.ab4 cb4 6.Qb3+–.

4.a3 d5 5.c5 Nd3 6.ed3 e5+–.

4.a3 e5 5.ab4 Qf6 (5...Nf6 6.Nf3+–) 6.Bb2 (6.Nc3 Qd8+–) 6...Bf5 (6...Qf5 7.Nc3 Nf6 8.g3+–) 7.Nf3 (7.Nc3 Ne7+–) 7...Bg4 (7...Qh6 8.Qa4 Bd7 9.Qa5+–) 8.e3 (8.Qa4 Bd7+–) 8...Qf5 (8...Qg6 9.Qa4 Bd7 10.Nc3+–) 9.Be2 g6 (9...Nf6 10.Nc3 Qg6 11.b6 cb6 12.Nb5+–) 10.h3 Bf3 11.Bf3 Qd3 (11...Qc8 12.Qa4 Ke7 13.c5+–) 12.Bb7 Rd8 (12...Rb8 13.Ra7 Be7 14.Bc6 Kf8 15.Qc1+–) 13.Bc6 Ke7 14.Nc3 Nf6 (14...Bg7 15.Ra7 Qc4 16.Qf3+–) 15.Ra7 Ne4 (15...Rc8+–) 16.Rc7 Ke6 17.Bd5 Kf5 (17...Qd5 18.cd5 Kf6 19.Qf3 Kg7 20.Qf7 Kh6 21.Ne4 Ra8 22.Qf6 Ra1 23.Ba1 Be7 24.Re7 Rc8 25.Qg5) 18.Qg4 Kf6 19.Rf7 1–0. GuestQNBR – GuestQVWS, freechess.org, 2019.

4.e4?? e5? (4...a6 5.Qb3 c5 6.bc6 Nc6 7.Nf3=) 5.d3?? (5.a3!? Nf6+–) 5...c5? (5...a6 6.Bd2 c5 7.bc6 Nc6 8.Nf3=) 6.Qa4 (6.a3 Nc6 7.bc6 bc6 8.Qa4+–) 6...Bd7 7.Nf3 (7.a3 Na6=) 7...Be7 (7...a6 8.Qb3–/+) 8.Be2 (8.a3 Na6=) 8...Nf6 (8...a6!? 9.Qb3 ab5–/+) 9.Nc3 (9.a3 Na6=) 9...0–0 (9...a6 10.Qb3=) 10.0–0 (better is 10.a3 Na6 11.0–0=) 10...Bg4?? (10...a6 11.Qb3=) 11.Qd1?? (better is 11.a3 Bf3 12.gf3+– (12.ab4?! Be2 13.Ne2 cb4+=)) 11...Qa5 (11...a6 12.Rb1 ab5 13.a3=) 12.Ng5 (12.a3 Nc6 13.bc6 Qc3 14.cb7 Qa1 15.ba8R Ra8 16.Qb3+–) 12...d5?? (better is 12...Be2!? 13.Qe2 a6=) 13.ed5 (better is 13.Bg4 Ng4 14.Qg4 dc4 15.dc4+–) 13...Nbd5?? (better is 13...Bf5+/–) 14.cd5 (better is 14.Nd5 Nd5 15.Bg4+– (15.cd5?! Bg5 16.Bg5 Be2 17.Qe2 f6+–)) 14...Qc3=+ 15.Bb2? (better is 15.Rb1!? Qd4 16.Bb2=+) 15...Qb2–+ 16.Bg4 Nd5 (better is 16...Rad8 17.Re1 h6–+) 17.a4?? (17.Ne6 Rfe8 18.Qf3=) 17...Bg5–+ 18.Qf3 Qd4 19.Bf5 Ne7 (19...Bd2!? 20.Ra2 Bc3 21.Re2–+) 20.Be4 Rab8 (20...Rad8 21.Qh5 h6 22.Bb7–+) 21.Bb7 Rb7 (better is 21...Rfd8 22.Be4 Bf4–+) 22.Qb7 Qd3 (better is 22...Nc8!?–+) 23.Qa7–/+ e4 (better is 23...c4!?–/+) 24.Qc5= Bf6 25.Rad1 Qc3 (better is 25...Qb3!? 26.a5 Qa4=) 26.Qc3+/– Bc3 27.Rd7 Nf5 28.b6 Bd4 (28...Nd4!?+/–) 29.a5+– Ra8 (29...Rb8 30.b7 e3 31.Rc1+–) 30.b7 Rb8?? (30...Re8+–) 31.Rc1 Ba7 (31...Rf8 32.Rc8 Be5+–) 32.Rc8 Rc8 1–0. Maec,Michael – Tippelskirch,Leon, remoteschach.de, 2003.

3.c4?? e5

4.a3 d5 5.ab4 Bb4 6.cd5 Qd5 7.e3 Nf6 8.Be2 Qg2 9.Bf3 Qg6 10.Qa4 Bd6 11.b6 Bd7= 12.Qb3 e4 13.Be4? Qe4–+ 14.f3 Qh4 15.Ke2 Qg5 16.Kf2 cb6 17.Qc4 Be6 18.Qa4 Bd7 19.Nh3?? Qe5 20.Qd4 Qd4 21.ed4 Bh3 0–1. tanto (1730) – bdbor (1835), net–chess.com, 2002.

4.a3+– Nf6 5.ab4 (5.Bb2 d5+–) 5...Bb4 6.Qb3 (6.Ra4 Bc5+–) 6...Qe7 (6...Bc5 7.Nf3+–) 7.Ba3 (7.Bb2 Bc5+–) 7...Ba3 8.Qa3 (8.Ra3 d6+–) 8...Qa3 (8...d6 9.Qg3 Be6 10.e3+–) 9.Ra3 (9.Na3 a5+–) 9...0–0 (9...a6 10.e3+–) 10.f3 (10.Nf3 e4 11.Nd4 a6+–) 10...d6 11.e4 (11.g4 a6+–) 11...Bd7 12.Bd3 (12.d4 ed4 13.Ne2 c5 14.bc6 bc6 15.Nd4 Rfb8+–) 12...Nh5 (12...a6 13.Ne2+–) 13.Ne2 (13.Nc3 a6+–) 13...a6 14.0–0 (14.ba6 Ra6 15.Ra6 ba6+–) 14...ab5 (14...Nf6 15.f4+–) 15.cb5 Ra3 16.Na3 b6 (16...Ra8 17.Nc2+–) 17.Ra1 (17.Rc1 Rc8+–) 17...Ra8 18.Nc2 Do you see the mate threat? 18...Ra1 19.Na1 Kf8 (19...Be6 20.Bc2+–) 20.Bc4 Ke7 (20...c6 21.bc6 Bc6 22.Nc2+–) 21.Nc2 c6 22.Na3 (22.bc6 Bc6 23.Nb4 Bb7+–) 22...cb5 (22...g6 23.bc6 Bc6 24.Nc2+–) 23.Bb5 Nf6 (23...Bb5 24.Nb5 Kd7 25.d4+–) 24.Bd7 (24.Nc3 Bb5 25.Nab5 h5+–) 24...Kd7 25.d4 Kc6 (25...ed4 26.Nd4 d5 27.e5+–) 26.de5 (26.Nc2 b5+–) 26...de5 27.Nc4 (27.Nc3 h5+–) 27...Nd7 28.Kf2 (28.Nb2 Kc5+–) 28...b5 (28...b5 29.Nb2 b4+–). Trkn – odinthor, itsyourturn.com, 2001.

3.e3 e6

4.Bb2 a6 5.c4 ab5 6.a3 =.

4.Bb2 Nh6? 5.a3 (better is 5.c4+–) 5...Nd5+= 6.c4 Nf6 7.Nf3 Bc5 (7...d5 8.d4=) 8.Be2 0–0 9.0–0 a6 10.Nc3 ab5 11.cb5 (11.Nb5 Be7=) 11...c6 (11...d5 12.d4 Bd6 13.Bd3=) 12.d4+= Bb6 13.a4 d5 (13...Ba5 14.Bd3+=) 14.Ba3 cb5? (better is 14...Re8!?+/–) 15.Bf8+– Qf8 16.Nb5 Nfg4 17.h3 Nf6 18.Ne5 Ne4 19.Bd3 Qb4 20.Be4 de4 21.Qc2 f6 22.Nc4 Nf5 23.Rfb1 Qe7 24.Qe4 Bd8 25.a5 h5 26.Nb6 Nh6 27.Na8 f5 28.Qf3 Qg5 29.Nd6 f4 30.Qf4 Qd5 31.Nc8 Bg5 32.Qd6 Qf5 33.Ne7 Be7 34.Qe7 Kh7 35.Rb7 (35...Nf7 36.Qf7 Qf7 37.Rf7+–) 1–0. gtate (1860) – richye (1900), net–chess.com, 2003.

4.c3 Nd5 5.c4 Nb4?? (5...Ndf6 6.Nf3=) 6.Nf3?? (6.a3 Nf6+–) 6...f6? (better is 6...a6 7.Bb2 ab5=) 7.Bb2 (7.a3 e5 8.ab4 Bb4+–) 7...Bd6 (better is 7...a6 8.a3 ab5 9.ab4 Ra1 10.Ba1 bc4+–) 8.a3 Qe7 9.ab4 Bb4 10.Be2 b6 11.0–0 Bb7 12.Ba3 0–0–0 (12...a6 13.Bb4 Qb4+–) 13.Bb4 Qb4 14.Nc3 Nh6 (14...Kb8 15.Ra4 Qd6 16.Qa1+–) 15.Ra7 Bf3 (15...Kb8 16.Qa1 d5 17.Rb7 Kc8 18.Qa8 Kd7 19.Rc7 Ke8 20.Qc6 Kf8 21.Nd4+–) 16.Bf3 c6 (16...d5 17.cd5 Kd7+–) 17.bc6 (17.Qa1 Qa5 18.Ra5 ba5 19.Qa5 Rhf8 20.Qb6 Ng8 21.bc6 dc6 22.Qc6 Kb8 23.Qb7) 17...dc6 18.Bc6 Qc4 19.Qa4 (better is 19.Qf3 Rd5 20.Nd5 Qd5 21.Bd5 Kb8 22.Ba8 Kc8 23.Qc6 Kd8 24.Qd7) 19...Rd6 (19...Qa4 20.Na4 Rd5 21.Nb6 Kd8 22.Nd5 ed5 23.Rb1 Kc8 24.Rbb7 Re8 25.Ra8) 20.Qc4 Rhd8 (20...b5 21.Bb5 Rc6 22.Qc6 Kd8 23.Qd7) 21.Nb5 (21.Ra8 Kc7 22.Nb5) 21...Rd2 (21...Rc6 22.Qc6 Kb8 23.Qc7) 22.Ra8 1–0. Fournier,Frederic (1955) – alfredin (1715), Active, 2004.

4.d4 Nf6 5.Nf3 Nbd5 6.Bd3 Ne3?? (better is 6...a6=) 7.fe3 g5 (7...d5 8.0–0+–) 8.Ng5 (better is 8.e4 g4 9.Nfd2+–) 8...Bh6 (8...Rg8 9.e4 h6 10.Nf7 Kf7+–) 9.Nf3 (better is 9.e4 Bf8 10.e5+–) 9...Be3 (9...Rg8 10.0–0 d6+–) 10.Be3 Rg8 11.g3 h5 12.Nbd2 (12.Bg5 Qe7+–) 12...Ng4 (12...Nd5 13.Qe2+–) 13.Bf4 e5 (13...f5 14.Qe2+–) 14.Ne5 (14.de5 Qe7 15.Qe2 f6 16.ef6 Qe2 17.Ke2 d6+–) 14...Ne5 (14...d6 15.Nef3+–) 15.Be5 (better is 15.de5 d5 16.ed6 Bg4+–) 15...Kf8 (15...d6 16.Bf4 Bg4+–) 16.Qh5 f6 (16...d6 17.Qh6 Ke8+–) 17.0–0 Rg7 18.Bf6 Rf7 (18...c5 19.Bd8 Kg8 20.Qe8) 19.Qh8 1–0. Fournier,Frederic (1800) – chino1961 (1655), Active, 2005.

3.e4 b6

4.a3 a6 5.ab4 Bb7 (5...e6 6.ba6 Bb4 7.Bb2+–) 6.ba6 Be4 7.Nc3 Bg6 8.Qf3 (8.Nf3 Nf6+–) 8...c6 (8...e6 9.Bd3 Bb4 10.Bb2+–) 9.b5 Nf6 (9...Qc8 10.Bd3+–) 10.bc6 dc6 (10...d5 11.Qg3 Qd6 12.Qd6 ed6 13.Nf3+–) 11.Qc6 Nd7 12.a7 e6 13.Nb5 Be4 (13...Bc5 14.Nc7 Ke7 15.Na8 Qa8+–) 14.Nc7 Ke7 15.Ba3 (better 15.Qe4 Qc7 16.Qa8 Qe5 17.Kd1 Qa1+–) 15...Kf6 16.Bb2 Kf5 17.g4! Kg5 (17...Kg4 18.Qe4 Double attack (18.Qe4 Deflection; 18.Na8 Zwischenzug)) 18.h4 Kh6 (18...Kg6 19.Qe4 f5 20.Qe6 Nf6 21.h5 Kh6 22.g5 Kg5 23.Nf3 Kh6 24.Qe3 f4 25.Qf4 g5 26.Qg5) 19.g5 Kh5 (19...Qg5 20.hg5 Kg5 21.Nh3 Kh6 22.Qe4 Be7 23.Qg4 Ne5 24.Nf4 Bh4 25.Rh4) 20.Be2 Kg6 21.Qe4 f5 22.h5 Kf7 (22...Kg5 23.Qf4! Kf4 24.Ne6 Ke4 25.Bf3) 23.Qe6 1–0. DEFFM – GuestPPTM, freechess.org, 2019.

4.a3 Nc2 5.Qc2 a6 6.ba6 (better is 6.d4+–) 6...Ra6? (6...Ba6 7.Ba6 Ra6+–) 7.Ba6 Ba6 8.d3 e5 9.f4 (9.Nf3 Bd6+–) 9...ef4 10.Bf4 (10.Nf3 Qf6 11.e5 Qg6 12.Qc7 Qd3+–) 10...Nf6?? (better is 10...Qf6 11.Nc3 Qf4+/–) 11.Bc7+– Qc8 12.Nf3 Bd3 13.Qd3 Qc7 14.0–0 Bd6 15.e5! Be5 16.Ne5 Qe5 17.Qc3 Qc5 18.Qc5 bc5 19.Re1 Kd8 20.Nc3 d5 21.Re5 d4 22.Nb5 Nd7 23.a4 h5?? 24.Rd5+– Rh6 25.Nd6 Rf6 26.Re1 Rd6 27.Rd6 Kc7 28.Rd5 Kc6 29.Rh5 c4 30.Kf2 g6 31.Rg5 c3 +–. bentengutama – achristopoulos (1710), net–chess.com, 2002.

4.a3 e5 5.ab4 1–0. bambinik (2480) – cool.can, 2003.

3.e4 d5

4.a3 Nc6 5.e5 Bf5 6.Nf3 e6 7.Bb5 Nge7 8.0–0 a6 9.Be2 Ng6 10.d4 Be7 11.Nbd2 0–0 12.g3 Bh3 13.Re1 Na7 14.Nf1 c5 15.Ne3 cd4 16.Bd4 Nc6 17.c3 Qc7 18.Bf1 Bf1 19.Nf1 Rac8 20.h4 Bd8 21.h5 Nge7 22.g4 Nd4 23.cd4 Qc2 24.Ne3 Qd1 25.Red1 Ba5 26.Rab1 b5 27.g5 Rc3 28.Ra1 Rfc8 29.Ne1 Bd8 30.Kf1 Nc6 31.Nf3 Na5 32.Ke2 Nb3 33.Rab1 Be7 0–1. Wong – S Larsson, corr 3GMM–22 1994–96.

4.a3 de4 5.ab4 Nf6 6.Bb2+–.

4.a3 e6 5.ab4 (5.e5 c5+–) 5...Bb4 (5...de4 6.Nc3 Nf6 7.Ra4+–) 6.e5 Qg5 (6...Nh6 7.Nf3+–) 7.Nf3 Qf4 (7...Qd8 8.Ra4 Be7 9.Nc3+–) 8.Be2 f6 (8...Nh6 9.0–0 Qf5 10.c4+–) 9.0–0 fe5 10.d4 e4 (10...Qf8 11.Ne5 Nf6+–) 11.Bf4 ef3 12.Bf3 Nf6 13.c3 (better 13.Bc7 0–0+–) 13...Ne4 14.cb4 Nc3 15.Nc3 (15.Nc3 0–0 16.Bc7+–) 1–0. DEFFM – GuestFPKD, freechess.org, 2019.

4.a3 Bg4 5.Be2 Be2 6.Ne2 (6.Ke2?! Qd7 7.Ke1 Qe6 8.ab4 Qe4 9.Kf1 Qb4+/–) 6...Nc2 (6...e6 7.ab4 de4 8.Bb2+–) 7.Qc2 g6 (7...e6+–) 8.Bb2 Nf6 (8...f6 9.Nf4 Rc8 10.Nd5+–) 9.Bf6 ef6 10.Nbc3 f5 (10...d4 11.Nd5 Bd6 12.Nd4+–) 11.Nd5 Bg7 (11...Bd6 12.Qb2 Kd7 13.e5+–) 12.Nc7 Kd7 13.Rc1 Rc8 14.b6 ab6 15.Qa4 b5 (15...Ke7 16.Qb4 Kd7 17.Qb5 Ke7 18.Nd5 Ke6 19.Rc8 Qc8 20.Nef4 Kd6 21.e5 Be5 22.Nb6 Qe8 23.Nc4 Ke7 24.Qe5 Kd8+–) 16.Qb5 Ke7 17.Nd5 Kd6 18.Qb4 Ke5 19.d4 Ke6 20.Rc8 Qc8 21.Qe7 1–0. marre – jaqqopo, internet live, 2010.

4.a3 Bg4 5.Be2 de4 6.Bg4 Nd5 7.d3 e6 8.de4 Bc5 (8...Qf6 9.Ra2 Nc3 10.Nc3 Qc3 11.Bd2+–) 9.Bb2 Bf2 (9...Ndf6+–) 10.Kf2 Qh4 (10...Ndf6 11.Qd8 Rd8+–) 11.g3 Qf6 (11...Ne3 12.gh4 Nd1 13.Bd1+–) 12.Bf6 Ndf6 13.e5 Ne4 14.Kg2 Ne7 15.Qd4 f5 16.ef6 Nf6 17.Be6 Nf5 18.Bf5 0–0 19.Qc4 Kh8 20.Nc3 Rae8 21.Qc7 Rc8 22.Bc8 Ne8 23.Qe7 Rf2 24.Kf2 Nf6 (24...h5 25.Qe8 Kh7 26.Bf5 g6 27.Qg6 Kh8 28.Qh7) 25.Qf8 Ng8 26.Be6 h5 (26...h6 27.Qg8) 27.Qg8# 1–0. MT – guest1904, ICC, 2004.

4.a3 Nc2

5.Qc2 a6 6.ba6 ba6 7.Nf3 f5 (7...de4 8.Qe4 Bd7 9.d4+–) 8.ed5 Qd5 9.Bc4 (9...Qd6 10.Bb2+–) 1–0. pierre (1985) – kings, internet, 2006.

5.Qc2 c6? 6.bc6 bc6 7.Qc6 Bd7 8.Qd5 Rc8 (8...Nf6 9.Qe5+–) 9.Nc3 e6 10.Qb3 Rb8 11.Qc2 Bc5 (11...e5 12.Nf3 Qc7 13.d4 ed4 14.Nd4+–) 12.Nf3 Qb6 (12...Qa5 13.d4 Bb4 14.Bb2+– (worse is 14.ab4 Qa1 15.b5 Rc8+–)) 13.Rb1 Qc7 14.Rb8 Qb8 15.d4 Bb6 16.Bc4 (16.Bd3 Ne7+–) 16...f5 (16...Ne7 17.0–0+–) 17.ef5 ef5 18.Qe2 (18.0–0 Nf6+–) 18...Ne7 19.Nd5 (19.0–0 Qd6+–) 19...Bd8 (19...Ba5 20.Nd2 Qd6 21.0–0+–) 20.0–0 Qd6 21.Bf4 Qc6 (21...Qa3 22.Ne5 Nd5 23.Bd5 Be7+–) 22.Ne5 Qd6 23.Qh5 g6 24.Ng6 Ng6 25.Bd6 Be6 26.Nf6! Bf6 27.Be6 Be7 (27...Bg7 28.Qf3 Bf6 29.Qc6 Kd8 30.Qd7) 28.Qf5 Nf8 (28...Rf8 29.Qb5 Kd8 30.Qd7) 29.Qf7 Kd8 30.Qe7 1–0. Whiterose – Meggy, ChessWorld.net, 2009.

5.Qc2 Qd6 6.Nc3 Qc5? (6...Nf6+–) 7.d4! (7.ed5?! Nf6+–) 7...Qc4 (7...Qd4 8.Nd5) 8.Bc4 dc4 9.Nd5 Bf5 10.Nc7 Kd7 11.Na8 Be4 12.Qe4 Nf6 (12...e5 13.Qb7 Ke6 14.Nc7 Kd7 15.Nd5 Ke6 16.Qc8 Kd5 17.Qc6 Kd4 18.Ne2 Kd3 19.Qf3 Kc2 20.Qc3) 13.Qb7 Ke6 14.Nc7 Kd6 (14...Kd7 15.Nd5 Ke6 16.Ne3 Ne8 17.Qc8 Kf6 18.Qf5) 15.Qc6 1–0. market (2295) – swoopt16, GameColony.com, 2002.

5.Qc2 de4 6.Nc3 Bf5 A) 7.Ne4 Qd4 8.Bb2 A1) 8...Be4?? 9.d3 (9.Bd4?! Bc2 10.Rc1 Be4=) 9...Bd3 10.Bd3+– (10.Bd4 Bc2 11.Rc1 Be4=+); A2) 8...Qe4 9.Qe4 Be4–/+; B) 7.Nge2+–.

5.Qc2 de4 6.Qe4 c5 7.bc6 Rb8 (7...bc6 8.Qc6 Bd7+–) 8.Qf4 (8.Qf4 Qd6 9.Qd6 ed6 10.c7+–) 1–0. Wall,Bill – DKZ, internet, 2003.

5.Qc2 de4 6.Qe4 Nf6 7.Qe5 Nd7 +–.

5.Qc2 de4 6.Qe4 Nf6 7.Qe5 e6 +–.

5.Qc2 de4 6.Qe4 Nf6 7.Qf4 +–.

5.Qc2 g6 6.Bb2 f6 (6...Nf6 7.e5 Nh5 8.Qa4+–) 7.ed5 (better 7.Nc3 e6+–) 7...b6 (7...Qd5 8.Nc3 Qc5 9.Qa4+–) 8.Bd3 Bb7 (8...Nh6+–) 9.Bg6! hg6 10.Qg6 Kd7 11.Qg4 (11.Nc3!? Kc8 12.Rc1 e5+–) 11...Ke8+– 12.Nc3 Nh6 (12...Bd5 13.Qg6 Bf7 14.Qe4+–) 13.Qe4 (13.Qf3 a6+–) 13...Rg8 (13...f5 14.Qc4+–) 14.Nge2 (14.Nh3 f5 15.Qf3 Qd6+–) 14...f5 (14...Rg5 15.f4 Bd5 16.Qd3+– (16.fg5? Be4 17.Ne4 Qd3–+; 16.Nd5?! Qd5 17.Qd5 Rd5+–)) 15.Qf3+– Rg2?? (better 15...Qd6+–) 16.Qg2 Qd6 17.Nd4 (17.0–0 Kd7+–) 17...Kd7 (17...Qe5 18.Nce2 Qd5 19.Qd5 Bd5 20.Rg1+–) 18.0–0 (18.0–0–0 Kc8 19.Nc6 a6+–) 18...Re8 (18...Bg7 19.Ne4 fe4 20.Qh3 Ke8 21.Qh5 Kd7+–) 19.Ne6 (19.Nc6 Qf6 20.Rae1 Nf7+–) 19...Kc8 (19...Ng4 20.f3 Ne5 21.Rae1+–) 20.Qg6 Ng4 (20...Rd8 21.a4 Ng4+–) 21.Qe8 (21.Qe8 Qd8 22.Qd8) 1–0. GuestYFRK – GuestCGTR, freechess.org, 2020.

4.a3 Nf6

5.e5 Nc2 6.Qc2 Ng8 7.d4 g6 8.Bd3 Nh6 9.Nf3 Bf5 10.Nc3 Qd7 +–.

5.e5 Nd3 6.Bd3 Ne4 7.Be2 d4 8.Bc4 Nc5 9.Qf3 e6 10.Ne2 Nd7 +–.

5.e5 d4 6.ab4 Nd5 7.Nf3 Bg4 8.h3 Bh5 9.c3 e6 10.g4 Bg6 +–.

5.e5 Nd7 6.d4 Nb6 7.ab4 h6 8.Bd3 g5 9.Nf3 g4 10.Nfd2 h5 +–.

5.e5 Nd7 6.Nf3 e6 7.d4+– a5 8.Be2 c5 9.ab4 cb4 10.c3 Be7 +–.

5.e5 e6 6.ab4 Nd7 7.d4 Bb4 8.c3 Be7 9.Qg4 g6 10.Ba3 Ba3 +–.

5.e5 Bf5 6.ab4 Nd7 7.Nf3 e6 8.c3 f6 9.d4 fe5 10.Ne5 Be7 +–.

5.e5 Bg4 6.f3 Bf5 7.ab4 Nd7 8.d4 e6 9.Qd2 f6 10.ef6 Qf6 +–.

5.e5 Ng4 6.d4 Nc2 7.Qc2 e6 8.Bb2 (8.h3!? Nh6 9.Bh6 gh6+–) 8...Bd7 9.Nf3 Be7 (9...Rc8 10.h3 Nh6 11.Bd3+–) 10.Be2 (10.Bc1 c6+–) 10...0–0 (10...c6 11.bc6 Bc6 12.Nfd2+–) 11.Nc3 (11.Bd3 f5+–) 11...c5 (11...c6 12.h3 Nh6 13.Bd3 cb5 14.Bh7 Kh8 15.Bd3+–) 12.h3 Nh6 13.Qd3 (13.dc5!? Bc5 14.Bd3 Rc8+–) 13...cd4 (13...c4 14.Qd2+–) 14.Qd4 Nf5 15.Qd3 (15.Qd2 Qb6+–) 15...Bc5 16.0–0 Qe7 (16...Rc8 17.Rac1+–) 17.Rfd1 (17.Rfc1 Rfd8+–) 17...Rfc8 (17...Ng3 18.Nd4 Ne2 19.Nce2+–) 18.Nh2 (better is 18.Na4!? Ng3 19.Nc5 Ne2 20.Qe2 Rc5+–) 18...Qh4 19.Ng4 (19.Rf1 Nd4+–) 19...Bd4 (19...h5 20.Ne3 Be3 21.fe3+–) 20.Rac1 Qg5 (20...a6 21.ba6 Ra6 22.Qd2+–) 21.Rc2 (21.Qf3 h5 22.Ne3 Nh4 23.Qh5 Be3 24.Qg5 Bg5+=) 21...Rc4 (21...h5 22.Bc1 Qg6+–) 22.Bc1 Qg6 23.a4 (23.Qd2 Rc7 24.Bd3 Rd8+–) 23...Bc3 (better is 23...Rac8!? 24.Bb2 h5+–) 24.Rc3 Ra4 25.Rc7 Rd4 26.Qc2 (26.Rd7?! Rd3 27.Bd3 a6+–) 26...Rd1 27.Qd1 Bc8 28.Bd3 (better is 28.Qc2 h5 29.Rc8 Rc8 30.Qc8 Kh7+–) 28...h5 (28...a6 29.Qc2 Bd7 30.Rd7 ab5 31.Rb7+–) 29.Ne3 Ne3 30.Be3 (30.Bg6 Nd1 31.Bh5 f6 32.ef6 gf6 33.Bd1 a6+–; worse is 30.fe3 Qg3+–) 30...f5 31.ef6 Qf6 32.Bd4! e5 (32...Qd4 Decoy theme: d4 33.Bh7 Discovered attack) 33.Ba7! Bh3 (33...Ra7 Theme: Deflection from c8 34.Rc8) 34.Qh5 (34.gh3 Qg5 35.Kh1 e4+–; 34.Rb7?! Bg4 35.f3 Ra7 36.Rb8 Kf7 37.fg4 e4 38.Be4 Ke7+–) 34...Bg2 (34...e4 35.gh3 ed3 36.Qd5 Kh8 37.Rb7 Qa1 38.Kh2 d2+–) 35.Bg6 Ra7 36.Qh7 Kf8 37.Qh8 1–0. NN – COMP, 1993.

5.e5 Ng4 6.d4 Nc2 7.Qc2 g6 8.Bd3 Bg7 9.Nf3 Nh6 10.0–0 Bg4 +–.

5.e5 Ng8 6.ab4 Bf5 7.Nf3 e6 8.c3 Ne7 9.Be2 Qd7 10.d4 Ng6 +–.

5.e5 Ne4

6.ab4 e6 7.Ra4 c6 8.bc6 Qb6 9.Qe2 Qc6 10.Qb5 Bd7 +–.

6.ab4 e6 7.Ra4 Qh4+– 8.Qe2 Bd7 9.g3 Qh6 10.Kd1 g5 +–.

6.ab4 e6 7.Nc3 Qh4 8.Qe2 Bb4 9.Ne4 Qe4 10.Qe4 de4 +–.

6.Nf3 c5+– 7.ab4 cb4 8.d3 Nc5 9.Bd2 e6 10.Be2 Bd7 +–.

6.Nf3 e6 7.d3 Qd7 8.Be3 Qb5 9.de4 Qa5 10.c3 Nc6 +–.

6.Nf3 h5 7.ab4 Bg4 8.d3 f5 9.de4 fe4 10.h3 Qd7 11.hg4 Qg4 12.Nd4 Qd1 13.Kd1 h4 14.Nc3 c5 15.bc5 Rb8 16.Nd5 Rc8 17.Ra7 b6 18.e6 g5 19.Nc7 Rc7 20.Ra8 Rc8 21.Rc8# 1–0. pierre – bumblebeetuna, internet, 2008.

3.e4 d6

4.a3 Nc2 5.Qc2 g6 (5...e5 6.Nf3 Nf6 7.d4 ed4 8.Bd3 d5+–; 5...Nf6 6.d4 e5 7.Bb2 d5 8.ed5 ed4+–) 6.Nc3 (6.d4 d5 7.ed5 Nf6 8.Nc3 Bf5+–) 6...Bg7 (6...Nf6 7.d4 Bg7 8.Nf3 0–0+–) 7.Bc4 e6 (7...Bd7 8.Qb3 e6+–) 8.Nf3 c6 (8...Ne7 9.d4+–) 9.0–0 d5 10.Bd3 a6 11.bc6 bc6 12.Bb2 Rb8 13.Rfb1 Nf6 14.ed5 Nd5 (14...cd5 15.Ba6 Ba6 16.Qa4 Qd7 17.Qa6 0–0+–) 15.Nd5 ed5 (15...Rb2 16.Rb2 Qd5+–) 16.Bg7 Rg8 17.Qc6 Bd7 (17...Ke7 18.Bf6 Kf8 19.Rb8 Qf6 20.Qf6 Ke8 21.Ne5 h6 22.Rc8) 18.Re1 Qe7 19.Re7 Ke7 20.Bf6 Kf8 (20...Ke8 21.Re1 Kf8 22.Qd6) 21.Qc5 Ke8 22.Qe7 1–0. pierre – tiagogo, internet, 2008.

4.a3 Nf6 5.ab4 Ne4 A) 6.Nf3 e5 (6...d5 7.d3 Nf6 8.c3 Bd7 9.d4 Bf5+–; 6...e6 7.Bb2 d5 8.Bd4 Bd7 9.Nc3 Bb4+–) 7.d3 Nf6 8.Be2 d5 9.Ne5 Bb4+–; B) 6.d3 Nf6 7.Nf3 d5 8.c3 Bd7+– 9.d4 Bf5+–.

4.a3 Nf6 5.Nc3 A) 5...d5 6.e5 A1) 6...Ng4 7.d4 e6 8.Be2 (8.ab4 Bb4 9.Bd2 Nh6+–) 8...f5+– 9.Nf3 Qd7+–; A2) 6...d4 7.ef6 dc3 8.ab4 cd2 9.Bd2 ef6+–; A3) 6...Nd7 7.e6 Nf6 8.ef7 Kf7 9.ab4 e5+–; B) 5...Ne4 6.Ne4 Bf5 (6...Nd5 7.d4 e5 8.de5 de5 9.Bb2 f6+–) 7.ab4 Be4 8.d3 Bg6+– 9.Nf3 e5+–.

4.a3 Nf6 5.Be2 A) 5...e5 6.ab4 C11) 6...Ne4 7.d3 Ng5 8.d4 (8.Nf3 Nf3 9.Bf3 d5+–) 8...Be7+– 2.12 9.de5 de5+–; C12) 6...d5 7.Bb2 Ne4 8.d3 Nf6 9.Be5 Bb4+–; B) 5...Ne4 6.ab4 e6 7.Nf3 d5 8.c3 Qf6+– (8...Bd7 9.d3 Nd6+–) 9.Qa4 Bd7+–; C) 5...e6 6.Nc3 d5 (6...c5 7.Nf3 Be7 8.0–0 0–0 9.Bb2 Nbd5+–) 7.e5 Ne4 8.ab4 Qg5+– 9.Ne4 de4+–.

4.a3 Nf6 5.Nf3 A) 5...Ne4 6.ab4 e5 (6...d5 7.d3 Nf6 8.c3 Bd7 9.d4 Bf5+–; 6...e6 7.d3 Nf6 8.d4 Be7 9.c3 0–0+–) 7.d3 Nf6 8.Be2 d5+– 9.Ne5 Bb4+–; B) 5...Nc2 6.Qc2 e5 7.Bb2 (7.d4 ed4 8.Bd3 Be7 9.0–0 d5+–) 7...Bg4 (7...Be7 8.d4 ed4 9.Bd4 0–0+–) 8.Be2 (8.d4 ed4 9.Nd4 d5+–) 8...Be7 (8...Qe7+– 9.0–0 Nh5+–) 9.d4 d5+–; C) 5...e6 C1) 6.Nc3 c5 (6...d5 7.e5 Ne4 8.Bb2 Bd7 9.ab4 Bb4+–) 7.Be2 Be7 8.0–0 0–0 9.Bb2 a6+–; C2) 6.d3 Nc2 (6...Nbd5 7.ed5 Nd5 8.d4 Be7 9.Bd3 0–0+–) 7.Qc2 Bd7 8.Nc3 c6 9.bc6 Bc6+–; C3) 6.ab4 Ne4 7.d3 Nf6 8.c3 (8.c4 d5 9.c5 Be7+–) 8...d5+– 2.25 9.d4 Bd6+–; D) 5...e5 6.ab4 Ne4 7.d3 Nf6 8.Be2 d5+– 2.16 9.Ne5 Bb4+–.

3.e4 e5

4.a3 a5 5.ab4 Bb4 6.Nf3 Qf6 (6...Nf6 7.c3 Be7 8.Ne5 Ne4 9.d3+–) 7.c3 Bc5 8.d4 ed4 9.e5 (9.cd4 d5 10.e5 Bb4 11.Bd2 Bd2 12.Nbd2 Qb6+–) 9...Qb6 (9...Qg6 10.cd4 Be7 11.Bd3 Bb4 12.Kf1+–) 10.cd4 (10.cd4 Bb4 11.Bd2 Bd2 12.Nbd2+– (worse 12.Nfd2 Qd4 13.Ra4 Qc5+–)) 1–0. Cirulis,Ilmars (1865) – Salinas,Marcelo, FICGS, 2016.

4.a3 Nc2 5.Qc2 b6 6.Bb2 (6.Nf3 Bc5+–) 6...f6 7.Bc4 (7.d4 ed4 8.Bd4 a6+–) 7...Nh6 (7...Bb7 8.Nf3+–) 8.Nc3 (8.Bd5 Rb8+–) 8...Ng4 (8...c6 9.Nge2+–) 9.Qb3 (9.Bd5 Rb8+–) 9...Bc5 10.Nh3 (10.Bf7 Ke7 11.Bh5 Nh6+–) 10...h5 (10...c6 11.Qd1 h5 12.0–0+–) 11.Na4 (11.Bd5 Rb8+–) 11...Nh6 (11...a6 12.Nc5 bc5 13.0–0+–) 12.0–0–0 (12.Nc5 bc5 13.Qf3 Nf7+–) 12...Ng4?! (12...a6 13.Bd5 Ra7 14.Nc5 bc5 15.Qa4+–) 13.Rdf1 (13.Bf7 Ke7 14.Bg6 Nh6+–) 13...Rf8 (13...a6 14.Nc5 bc5 15.Kd1+–) 14.f4 (14.f3 Nh6+–) 14...Bd6 (14...a6 15.Nc5 bc5 16.fe5 ab5 17.Bb5+–) 15.fe5 (15.Bd5 c6 16.bc6 Qc7+–) 15...fe5 (15...Be5 16.Bd5 c6 17.bc6+–) 16.Rf8 (16.Bf7 Ke7 17.Bh5 Nf6+–) 16...Kf8 17.Rf1 Nf6 18.Bg8 (18.Qg3 Qe8 19.Qg5 Ke7 20.Qg7 Kd8 21.Qf6 Qe7 22.Qh8 Qe8 23.Qe8 Ke8+–) 18...Qe8 (18...Qe7 19.Ng5 Ke8 20.Bf7 Kd8 21.Bh5+–) 19.Ng5 g6 (19...Ke7 20.Bf7 Qf8+–) 20.Rf6 (better 20.Nh7 Kg7 21.Nf6+–) 20...Kg7 (20...Ke7 21.Rf7 Kd8+–) 21.Rf7 Kh6 (21...Qf7 22.Qf7 Kh6 23.Nf3 Ba3 24.Qh7) 22.Rh7 Kg5 23.Qg3 Kf6 24.Rf7 (24.Qf4! mate) 24...Qf7+– 25.Qf3 (25.Qf4 Ke7 26.Qf7 Kd8 27.Be5 Ba6 28.Bf6 Kc8 29.Qe8 Kb7 30.Bd5 c6 31.Qd7 Bc7 32.Qc6 Kc8 33.Qe8 Bd8 34.Qd8) 25...Ke7 (25...Kg5 26.Bf7 h4 27.Qe3 Kf6 28.Qf4 Ke7 29.Be5 Be5 30.Qe5 Kf7 31.Qd5 Ke7 32.Qa8+–) 26.Qf7 Kd8 27.Be5! Ba3 (27...Be5 28.Qf8) 28.Kc2 (28.Nb2 Ba6 29.Bf6 Kc8 30.Qe8 Kb7 31.Bd5 c6 32.Qd7 Kb8 33.Be5 Bd6 34.Bd6) 28...d6 (28...Ba6 29.Bf6 Kc8 30.Qe8 Kb7 31.Bd5 c6 32.Qd7 Kb8 33.Be5 Bd6 34.Bd6) 29.Bf6 1–0. jaddwarrior (1860) – matthewUHS, ChessWorld.net, 2015.

4.a3 Nc2 5.Qc2 d5 6.ed5 Bd6 7.Nf3 +–.

4.a3 Nc2 5.Qc2 d5 6.Nf3 +– 1–0. MT – johnsheek, ICC, 2004.

4.a3 Nc2 5.Qc2 Qf6 6.Nc3 Bc5 7.f3 Qh4 8.g3 Qf6 9.Nd5 Qd6 10.Bb2 Bd4 11.Bd4 ed4 12.Nc7 Kf8 13.Na8 Qb8 14.Nc7 Ne7 15.Nd5 Nd5 16.ed5 Qe5 17.Qe4 Qf6 18.Rc1 g6 19.Rc8 Kg7 20.Rh8 Kh8 21.Bd3 Qd8 22.Ne2 Kg8 23.0–0 a5 24.Nd4 Qg5 25.Qe8 Kg7 26.f4 Qd5 27.Qe5 (27...Qe5 28.fe5+–) 1–0. lesbian12 – manofsteel3, Caissa.com, 2005.

4.a3 Nc2 5.Qc2 Qh4 6.Nf3 Qg4 7.Ne5 Qf4 8.d4 Qf6 9.Bc4 Ke7 10.Nf7 Qd4 11.Nh8 Qa1 12.Bb2 c6 13.Ba1 cb5 14.Bg8 d5 15.Qc7 Ke8 16.Bf7# 1–0. pereira – kipper, internet, 2007.

4.a3 Nc6? 5.bc6 bc6 6.Bb2 Ba6?? (6...Nf6+–) 7.Ba6 Rb8 (7...Qh4 8.Qe2 f6 9.Nc3+–) 8.Be5 Qh4 1–0. DEFFM – iLittleWolf, freechess.org, 2018.

4.a3 Nc6? 5.bc6 dc6 6.Bb2 Nf6 7.Be5 Bg4 (7...Qe7 8.Nf3 Ne4 9.Bd3+–) 8.f3 Bh5 9.Nc3 Bd6 10.Bd6 cd6 11.h4 Qe7 (11...Bg6 12.Nge2+–) 12.g4 Bg6 13.h5 Bh5 14.gh5 (14.Rh5?! Nh5 15.gh5 Qh4 16.Ke2 Qh2 17.Kd3 Qg1+/–) 14...0–0 (14...d5 15.Qe2 0–0–0 16.e5+–) 15.d4 c5 16.h6 gh6 17.Qd2 cd4 18.Qd4 Rfd8 19.Rh6 Kg7 (19...Nd7 20.f4 f6 21.Bc4 Kh8 22.Nf3+–) 20.Rh5 Kg6 21.Rf5 d5 (21...h6 22.Nh3 Nd7 23.Qg1 Kh7 24.Ng5 hg5 25.Rg5+–) 22.Nge2 Nh5 23.Qg1 Kh6 24.Qg4 de4 (24...Qh4 25.Qh4 Kg7 26.Rh5 b5 27.Rh7 Kg8 28.Qh6 de4 29.Qg7) 25.Rh5 1–0. _chess_ (1650) – jkarp, gameknot.com, 2011.

4.a3 d5 5.Bb2 h5 (5...Nf6 6.ab4 Ne4 7.Ra4+–) 6.ab4 Bb4 (6...de4 7.Be5 Nf6 8.Ra4+–) 7.Ra4 Bd6 (7...Qe7 8.ed5 Nf6 9.Bc4+–) 8.ed5 Bg4 (8...Nf6 9.Nc3+–) 9.Nf3 Nf6 (9...Ne7 10.Nc3+–) 10.h3 (better 10.Nc3+–) 10...e4 (10...Bd7 11.Bd3 0–0+–) 11.hg4 ef3 12.Qf3 Ng4 (12...0–0 13.Be2 Re8+–) 13.Rg4 Qe7 14.Re4 1–0. Pierre – Waldorffy, internet, 2020.

4.a3 d5 5.ab4 d4 6.c3 b6 (6...Qh4 7.Qe2 Nf6 8.Nf3 Qe4 9.Ne5+–) 7.Qb3 Be6 8.Bc4 Nf6 (8...Qe7 9.Be6 Qe6 10.Qe6 fe6 11.Bb2+–) 9.Be6 fe6 10.Qe6 Be7 11.Qe5 dc3 12.dc3 Qd7 13.Nf3 0–0–0 14.0–0 Rhe8 15.Ra7 Bd6 (15...Kb8 16.Ra1 Bd6 17.Qg5 Ne4 18.Qh4 Qb5 19.Qh7 Bb4 20.Qg7 (20.cb4?! Qf1 21.Kf1 Rd1 22.Ne1 Rc1+/–) 20...Qf1 21.Kf1 Rd1 22.Ne1 Rc1 23.g3 Nc3 24.Kg2 Rb1 25.Rb1 Nb1 26.Nd3+–) 16.Qf5 (16.Ra8!? Kb7 17.Rd8 Qd8+–) 16...Kb8 17.Ra6 Re4 18.Qd7 Rd7 19.Nbd2 Ree7 (19...Re8 20.Nd4 Kb7 21.Nc6+–) 20.Nc4 (better is 20.Nd4 Kb7 21.Nc6 Re8+–) 20...Re2 (20...Re4 21.Nd4 Rd4 22.cd4+–) 21.Nd6 (better is 21.Be3!? Kb7+–) 21...Rd6 22.Nd4 Re5 (22...Rd4 23.cd4 Nd5 24.Bg5+–) 23.Bf4 Ng4 (23...Rd4 24.Be5 Rd5 25.Rfa1+–) 24.Rfa1 (better is 24.Nc6 Kc8 25.Ra8 Kd7 26.Be5 Ne5 27.Ne5 Ke7+–) 24...Kc8 25.Be5 Ne5 26.Ra8 Kd7 27.Rg8 g6 (27...Rg6 28.Re1 c5 29.bc5 bc5 30.Re5 cd4 31.c4+–) 28.Rg7 Kc8 29.Rh7 Ng4 30.Ra8 Kb7+– 31.Rhh8 c6 32.bc6 Rc6 33.Rab8 Kc7 34.Rhc8 Kd7 35.Rc6 Ke7 36.Rb7 1–0. Urbaniak,Marcin – Meetze,Bill, M1–2009.T96.02, 2009.

4.a3 d5 5.ab4 de4 6.Bb2 Bd6 (6...Qg5 7.Qe2 Qf5 8.f3 ef3 9.Nf3+–) 7.Bc3 (7.c4 Qh4+–) 7...Nf6 (7...Qe7 8.d4+–) 8.d4 (8.Na3 0–0+–) 8...Bg4 (8...ed3 9.Bd3 Nd5 10.Ra4+/–) 9.Be2 Qc8?? (better is 9...Be2 10.Ne2 Qe7+–) 10.de5 1–0. Wall,Bill – Eagle1856, internet, 2005.

4.a3 Qe7? 5.ab4 Qb4 (5...Nf6 6.Nc3+–) 6.Nc3 Qc5 (6...Nf6 7.Ba3 Qd4+–) 7.Ba3 Qb6 (7...Qa3 8.Ra3 Ba3+–) 8.Nd5 Qh6 (8...Qg6 9.Nc7 Kd8 10.Na8 Qe4 11.Qe2 Qe2 12.Ne2 Ba3 13.Ra3+–) 9.Nc7 (9.Nc7 Kd8 10.Na8+–) 1–0. DEFFM – GuestCGPS, freechess.org, 2019.

4.a3 Qh4 5.ab4 Qe4 6.Qe2 Qe2 7.Ne2 +–.

4.c3 Nd3? 5.Bd3 d6 (5...Nf6 6.Qe2+–) 6.Nf3 Nf6 7.0–0 Be7 8.c4 c5 9.Nc3 0–0 10.Bb2 Ng4 11.Nd5 Be6 12.h3 Nf6 13.Qe2 g5 (13...Nd5 14.cd5 Bd7 15.a4+–) 14.Ng5 h6 (14...Bd7 15.Ne3 h6 16.Nf3+–) 15.Ne6 fe6 16.Ne3 Qa5 (16...Qe8 17.f4+–) 17.f4 ef4 18.Rf4 d5 (18...e5 19.Rf2 Rf7+–) 19.ed5 ed5 20.Nd5 Nd5 (20...Rf7 21.Ne7 Kf8 22.Bf6 Qc7 23.Bh7 Ke8 24.Ng6 Re7 25.Be7 Qf4 26.Bh4 Qe5 27.Ne5 Rc8 28.Qg4 Rd8 29.Qg8) 21.Qe6 Rf7 22.Qf7 1–0. waller – irii, internet, 2011.

4.c3 Nd3? 5.Bd3 Qf6 6.Nf3 Bc5 7.c4 (7.Bc4 a6 8.ba6 b6+–) 7...Nh6 (7...d6 8.0–0+–) 8.Bb2 0–0 (8...d6 9.Be2+–) 9.Be5 Qg5 (9...Qg6 10.Bg3 f5+–) 10.Ng5 Ng4 11.Qg4 d6 12.Ne6 (better 12.Qh5 h6 13.Bc3 hg5+–) 12...Be6 13.Qg7 1–0. sirgeshdb – Elmar_Felix, lichess.org, 2020.

4.c3 d5 5.a3 de4 (5...Nf6 6.ab4 de4 7.d3 Be7 8.f3 ed3 9.Qd3 Nd5 10.Na3+/–; 5...Bg4 6.Qa4 Nd3 7.Bd3 Nf6 8.Bc2 a6 9.Nf3 Bd7 10.Qb3+–; 5...Na2 6.Ra2 de4 7.d4 ed3 8.Qd3 Be6 9.Qd8 Rd8 10.Re2+– 1.75) 6.ab4 Nf6 7.d3 Be7 8.f3 ed3 9.Qd3 Nd5 10.Na3 +/–.

4.c3 d5 5.cb4 A) 5...Nf6 6.ed5 (6.a3 de4 7.Qc2 Bf5 8.Bc4 Qd7 9.Ne2 e3 10.Qb3+=; 6.Qb3 Bd6 7.ed5 0–0 8.Bc4 e4 9.Bb2 Ng4 10.Ne2+–) 6...Bb4 7.Bc4 0–0 8.Ne2 a6 9.ba6 b5 10.Bb5+–; B) 5...de4+– 6.Qb3 Nf6 7.Bc4 Qd7 8.Ne2 Bd6 9.Bb2 0–0 10.Nbc3+–.

3.e4 e6

4.a3 Qf6 5.c3 Bc5 (5...Nd5 6.ed5 ed5 7.Nf3+–) 6.Nf3 Nd3 (6...Nd5 7.d4 Be7 8.ed5 ed5 9.Bd3 Qe6 10.Be3+–) 7.Bd3 Qg6 (7...g5 8.Bb2+–) 8.0–0 1–0. DEFFM – GuestFMWZ, freechess.org, 2020.

4.a3 Qf6 5.Nc3 Nc2 6.Qc2 d5 7.d3 de4 (7...d4 8.Nce2+–) 8.de4 c6 9.bc6 bc6 10.Nf3 Bd6 (10...e5+–) 11.Bg5 Qg6 12.Nb5! Kd7 (12...cb5 13.Qc6 Mate attack) 13.Ne5! Be5 (13...Be5 14.Qd3 Mate attack) 14.Rd1 Ke8 (14...Bd6 15.Rd6 Ke8 16.Rd8) 15.Rd8 1–0. pierre – koeo, internet, 2010.

4.a3 Qf6 5.Nc3 Nc6 6.bc6 Ne7 (6...bc6 7.Rb1+–) 7.cb7 Bb7 8.Rb1 Rb8 (8...0–0–0 9.d4 d5 10.e5+–) 9.Ba6 Ba6 10.Rb8 Nc8 11.Qh5 g6 (11...c5+–) 12.Qa5 e5 13.Nd5 Qg5 14.Qa6 Be7 15.Qc8 Bd8 16.Nf3 c6 17.Ng5 0–0 18.Nf6 Kg7 19.Qd7 Kf6 20.Nh7 Kg7 21.Nf8 c5 (21...Be7 22.Qe7 Kh6 23.Ne6 g5 24.Qf7 a6 25.Rh8) 22.Qd8 a5 (22...Kh6 23.d4 Kg7 24.Ne6 fe6 25.Rb7) 23.Ne6! fe6 (23...fe6 24.Rb7) 24.Qe7 Kh6 25.Rh8 1–0. PierreD – Vaine, internet free game, 2018.

4.a3 Nf6 5.ab4 Ne4 6.Bb2 Bb4 7.Qg4 Nf2 8.Qg7 Bf8 9.Qh8 Qh4 10.g3 Qe4 11.Kf2 Qh1 12.Bg7 Qh2 13.Bg2 d5 14.Qf8 Kd7 15.Qf7 Kd6 16.Bf8 Ke5 17.Qf4# 1–0. Machete99 – KNEiTER, ICC, 2002.

4.a3 Qh4 5.Nc3 Nc2 6.Qc2 Bc5 7.d3 Nf6 8.Nf3 Qh5 9.Bb2 Bb6 10.Be2 0–0 11.0–0 d6 12.d4 Bd7 13.a4 c5 14.a5 Bc7 15.Ne5 Qh4 16.Nd7 Nd7 17.Qd2 cd4 18.Qd4 Nc5 19.b6 (19.Nd5 e5 20.Qb4 Rfc8+–) 19...Nb3? (19...ab6 20.Nd5 e5+–) 20.Qd1 Na1 21.bc7 (21.Qa1?! ab6 22.Nb5 Ra5=) 21...Qe7 22.Qa1 Qc7 23.Nb5 Qc2 24.Re1 Qe4 25.Bg7 Rfd8 26.Bf6 Rd7 27.Na7 Qf5 28.Qd4 Ra7 (28...e5 29.Qh4 Ra7+–) 29.Bd3 Qa5 (29...Qf6 30.Qf6 Ra5 31.Bh7 Kh7+–) 30.Qg4 (30...Qg5 31.Qg5 Kf8 32.Qg7 Ke8 33.Qg8#) 1–0. MacChess 5.0 – RChess, 2000.

4.c3 Qf6 5.d4 +–.

4.c3 Qh4 5.cb4 Qe4 6.Qe2 Qb4 7.Nf3 +–.

4.c3 Qh4 5.d3 +–.

3.e4 Nf6?

4.a3 a5? 5.ab4 a4 (5...Ne4 6.ba5 c6 7.Qf3+–) 6.e5 Nd5 7.c4 Nb4 8.Ra4 Ra4 9.Qa4 Nd5 1–0. BlackDemon (2610) – TruSiCk (1710), FICS rated standard game, 2013.

4.a3+– d5 5.ab4 Ne4 6.d3 +–.

4.a3+– d5 5.e5 Bg4 6.f3 Bh5 (6...Bf5 7.ab4 Nd7+–) 7.ef6 (7.ab4?! Nd7 8.d4 e6+–) 7...Qd6 (7...Nc2 8.Qc2 Bg6 9.Bd3+–) 8.c3 (8.ab4 Qe5 9.Ne2 Qa1+–) 8...Qe6 9.Kf2 Nd3 10.Bd3 Qf6 11.b6! Qh4 (11...ab6 12.Ne2 Combination; 11...cb6 12.Bb5 Decoy; 11...Qb6 12.Ke1 Combination) 12.g3 Qf6 13.bc7 e6 (13...Qb6 14.Kg2 Kd7+–) 14.Qa4 Ke7 15.Qa7! Ra7 (15...Kd7 16.Qb7 (16.Qa8?! Bc5 17.Kg2 Ra8+–) 16...Bc5 17.Kg2+–) 16.c8Q b6 17.a4 d4 18.Ba3 1–0. GuestLQXW – GuestXZYP, freechess.org, 2018.

4.a3+– e5 5.ab4 Bb4 6.c3 +–.

4.a3+– Nc2

5.Qc2 d5 6.ed5 Nd5 7.Bb2 +–.

5.Qc2 c6

6.Bb2 Qa5 7.Nc3 d5 (7...a6 8.bc6 dc6 9.d4+–) 8.bc6 bc6 (8...de4 9.Nb5 Nd5 10.Qc5+–) 9.Nd5! c5 (9...Nd5 10.Qc6) 10.Bb5 Bd7 11.Nf6 ef6 12.Bd7 Kd7 13.Qc4 Qb6 (13...Ke8 14.Nf3+–) 14.Qf7 Be7 15.Bc3 Qa6 (15...Qe6 16.Qe6 (< 16.Qg7 Qe4 17.Ne2 Rhg8+–) 16...Ke6 17.Ne2+–) 16.Ne2 Raf8 (16...Qe6 17.Qe6 Ke6 18.d4+–) 17.Qg7 Rfg8 18.Qf7 Rf8 (18...Rg2 19.Nf4 Rg5 20.Nd5+–) 19.Qd5 Bd6 (19...Qd6 20.Qb7 Qc7 21.Rb1+–) 20.Nf4 Kc8 (20...Rhg8 21.Qe6 Kd8 22.Bf6 Rf6 23.Qg8 Kd7 24.Qh7 Be7 25.Nd5+–) 21.Qf5 Kd8 (21...Kb7 22.Rb1 Kc6 23.Qd5 Kd7 24.Qe6 Kc6 25.Bf6 Rf6 26.Qf6+–) 22.Bf6 Be7 23.Ne6 Ke8 24.Nc7 Kf7 25.Bh8 Bf6 26.Qh7 Bg7 27.Qg7# 1–0. Taulien,Hans_Juergen – Stahn,Hartmut, remoteschach.de, 2001.

6.Bb2 a6 7.ba6 b5 +–.

6.Nf3 cb5 7.Bb5 a6 8.Bc4 d5 9.ed5 b5 +–.

6.Nf3 cb5 7.Nc3 Qc7 +–.

6.Nf3 cb5 7.e5 Nd5 8.Bb5 a6 9.Bc4 e6 (9...Nb6 10.Be2+–) 10.0–0 (10.Bd5!? ed5 11.Nc3 Qa5+–) 10...d6 11.d4 Be7 12.Re1 (12.Rd1 Qc7+–) 12...0–0 (12...de5 13.de5 b5 14.Bd5 Qd5 15.Rd1+–) 13.Bd3 g6 (13...h6 14.Nc3+–) 14.Nc3 Qc7 (14...Nc3 15.Qc3 f6+–) 15.Nd5 Qc2 (15...Qd8 16.Ne7 Qe7 17.a4+–) 16.Ne7 Kh8 (16...Kg7 17.Bc2 de5 18.de5+–) 17.Bc2 1–0. Wall,Bill – Aristoralloss, internet, 1996.

6.Nf3 d5 7.e5 Ne4 8.d3 Qa5 9.Kd1 Nf2 10.Qf2 Qa4 11.Qc2 Qb5 12.Nc3 +–.

2.b5 Nb8

3.Ba3 d6 4.e4 Nf6 5.Nc3 e5 6.Be2 Be7 7.Bh5 (7.Nf3 a6=) 7...0–0 (7...a6 8.b6–/+) 8.Qe2 (8.Be2 a6 9.ba6 Na6+=) 8...a6–/+ 9.Rb1 (9.ba6!? Ra6 10.Bb2–/+) 9...ab5–+ 10.Nb5? (better is 10.Bc1–+) 10...c6 11.Bd6 (11.Bf3 cb5 12.Qd3 Nc6 13.Rb5 Nd4–+) 11...cb5 (11...Bd6!? 12.Nc3–+) 12.Be7 Qe7 13.Rb5 (13.Rb2 Be6–+ (13...Nh5?! 14.Qh5 Nc6 15.Qf3–+)) 13...Ra2 14.d3 Ra1 15.Kd2 Nc6 16.Kc3 (16.Bf7 Rf7 17.Qe3–+) 16...Nd4 17.f4 (17.Kd2 Ne2 18.Be2 Qa3–+) 17...Ne2 18.Be2 ef4 19.e5 Bd7 20.ef6 Qf6 (20...Bb5 21.fe7 Re8 22.Kb2–+) 21.Kd2 Bb5 22.Bd1 g5 (22...Qg5 23.Bf3 Qc5 24.Bb7 Ba4 25.c4 Qd4 26.Nf3 Qb2) 23.Nf3 Kg7 (better is 23...Qe7 24.Re1 Qc5 25.Re5 Qb4 26.Ke2–+) 24.Ng5 Qg5 25.Rg1 f3 0–1. Kientzler,Roland – Roever,L, corr SOK–89–34, 1989.

3.a4 b6 4.Bb2 Bb7 5.e3 e6 6.a5 (6.Nc3 Nf6+=) 6...ba5 7.Ra5 c5 (7...c6 8.bc6 Nc6 9.Ra1=) 8.Ra1 d5 9.Nc3 (better 9.f4+=) 9...Bd6? (better 9...Nf6!?=) 10.Nd5!+– Bf8 (10...Bd5 11.Bg7 Combination; 10...ed5 11.Bg7 Combination) 11.Nf4 Nf6 (11...Nd7 12.Nh5 Ngf6 13.Nf6 gf6 14.Qh5+–) 12.Bc3 (12.Nf3 Nbd7+–) 12...Bd6 (12...Nbd7 13.Nf3+–) 13.Ngh3 (13.Nh5 Rg8+–) 13...e5 (13...Nbd7 14.Bc4+=) 14.Ne2 (14.Nh5 0–0 15.Nf6 Qf6+–) 14...0–0 15.Ng3 g6 16.Ra2 (16.f3 Nbd7+–) 16...Nd5 17.Bb2 (17.Bd3 c4 18.Be4 f5+=) 17...Nb4 (17...Qh4 18.e4 Nf4 19.Nf5 Ng2 20.Bg2 gf5 21.d3+=) 18.Ra4 (18.Ra1 a6 19.f3 Qb6+=) 18...Nd5 (18...Nd7 19.c3 Nd5 20.Qa1=) 19.Qa1 (19.Ra1 a6+=) 19...Nd7= 20.Ra7 Ra7 (20...Qc7 21.Ra8 Ra8 22.Qc1=) 21.Qa7 Ba8? (better 21...Qc7 22.Qa4 Ra8+=) 22.Be2 (22.Ne4 N7b6 23.Nhg5 Qe7 24.Qe7 Be7+– (24...Ne7?? 25.Nd6 Nf5 26.Nf5 gf5 27.Be5+–)) 22...N5b6 23.0–0 Bb8 (23...Bd5 24.e4 Be6 25.Ra1+–) 24.Qa5 Qc7 Black prepares the advance c4 (24...Bd5 25.Ra1+–) 25.d3 h5 (25...Bb7 26.Ra1+–) 26.e4 (26.Ng5 Bd5+–) 26...Qc8? (26...h4 27.Nh1+–) 27.Qa1 (better 27.Ra1!? Bb7+–) 27...c4 28.Rc1 Qc5 (28...Bd6 29.Rd1+–) 29.dc4 (better 29.Ba3 Qb5 30.dc4+–) 29...Nc4?? (better 29...Bd6 30.Rd1 h4+–) 30.Ba3 (better 30.Bc4 Qc4 31.Qa8 Qb5 32.Qa2+–) 30...Na3–+ 31.c4 Nb6 (better 31...Bd6!?–+) 32.Rc3 Nac4 (better 32...Bd6 33.Qc1 Rc8 34.Nh5 Nd7–+ (34...gh5 35.Qh6 Be4 36.Rg3 Bg6 37.Rg6 fg6 38.Qg6 Kh8 39.Qh5 Kg8 40.Qg6 Kh8 41.Ng5+–)) 33.Bc4= Be4?? (better 33...Nc4 34.Qa8 Qb5=) 34.Bf7!+– (34.Bf7 Rf7 35.Rc5+–) 1–0. invictus31 (1710) – diooooooo1 (1795), lichess.org, 2020.

3.a4 e5 4.Bb2 d6 5.d4 Nd7 (5...e4 6.d5=) 6.e3 (6.e4 Ngf6 7.Bd3 Qe7=) 6...Ngf6 7.Nf3 ed4 (7...Qe7 8.de5 de5 9.a5=) 8.ed4 (8.Nd4 d5=) 8...d5 9.Nbd2 c6 (9...a6 10.Bd3=) 10.Bd3+= Be7 11.0–0 0–0 12.c4 (12.Ba3 Ba3 13.Ra3 c5+=) 12...dc4= 13.Nc4 cb5 14.ab5 Nd5 15.Qb3 (15.Ba3 Re8+=) 15...N7b6 (15...N7f6 16.b6 a6 17.Rfe1+=) 16.Nb6+= Nb6 17.Be4 (17.Rfe1 Nd5+=) 17...Be6 (17...Nd7!?+=) 18.Qc2+– Rc8 (18...Nd5 19.Bh7 Kh8 20.Bf5+–) 19.Qb1 g6 (19...Nd5 20.Bh7 (20.Ra7?! Qb6 21.Ra1 h6+=) 20...Kh8 21.Bf5+– (21.Ra7?! g6=)) 20.Bb7 Rc7 21.Bc6 (21.Ra7 Qb8 22.Qa1 Rb7 23.Rb7 Qb7–+) 21...Bd5 22.Ne5 Kg7 (22...Qb8 23.Ba3 Ba3 24.Ra3+–) 23.Rc1 f6 (23...Qb8 24.Qd3+–) 24.Bd5 fe5 25.Bb3 (25.Be6 ed4 26.Bd4 Bf6 27.Rc7 Qc7+–) 25...ed4 26.Bd4! Bf6 (26...Qd4 27.Rc7 Deflection (27.Rc7 Overloading)) 27.Bf6 Rf6 28.Rc7 Qc7 29.Qb2 Qe7 30.Qc3 g5 (30...Qd7 31.Re1 Qf5 32.f3+–) 31.Re1 Qd7 (31...Qd6+–) 32.Re6 Qd8 (32...Qf7 33.Re5 Qg6 34.Re7 Kf8 35.Qc5+–) 33.Qe5 (33.Qe5 Kg6 34.Qe4 Kh6 35.Bc2+–) 1–0. pcmvr – mgilbert, net–chess.com, 2017.

3.Bb2 e6 (--> 1.b4 e6 2.Bb2 Nc6 3.b5 Nb8).

3.Bb2 Nf6 (--> 1.b4 Nf6 2.Bb2 Nc6 3.b5 Nb8).

3.c4 a6 4.a4 ab5 5.cb5 c6 6.e3 e5 7.Qb3 (7.Bb2 f6=) 7...d6 8.Nc3 Be6 9.Qb2 Nf6 10.Nf3 Be7 11.d4 e4 12.Nd2 d5 13.f3 (13.bc6 bc6 14.Qc2 0–0=) 13...Bf5 (13...ef3 14.gf3 c5 15.dc5 Bc5 16.Nb3=+) 14.g4 (14.bc6 bc6 15.fe4 de4+=) 14...Bg6 15.g5 Nfd7 16.h4 Qa5 (16...ef3 17.bc6 f2 18.Kf2 bc6 19.h5=+) 17.Bh3 (17.bc6 Nc6 18.h5 Bf5=+) 17...h6 (17...Bb4 18.Na2 Bd2 19.Bd2=) 18.f4 (18.h5!? Bh7 A) worse 19.fe4 Bb4 (19...Bg5?! 20.ed5 cb5 21.Nb5=) 20.bc6 bc6–/+; B) 19.bc6 bc6 B1) worse 20.fe4 Bb4 (20...hg5?! 21.ed5 Bb4 22.Na2 Bd2 23.Bd2 Qd5 24.Rg1 Ra4 25.Nc3 Ra1 26.Qa1+=) 21.Ne2 Be4–/+; B2) 20.gh6 gh6 21.Nb3=) 18...hg5 (18...Bb4 19.Ne2 hg5 20.bc6 Nc6 21.Bd7 Kd7 22.fg5–+) 19.hg5 (19.bc6 bc6 (worse 19...Nc6 20.Bd7 Kd7 21.Qb7 Qc7 22.Qc7 Kc7 23.Nd5 Kd8 24.Ne7 Ke7 25.fg5+–) 20.Nb3 Qa6 21.hg5 Bf5=+) 19...Bf5 20.Bf5?? (better 20.Nb3 Qb4 21.Bg2 Rh1 22.Bh1–/+) 20...Rh1–+ 21.Kf2 (21.Nf1 Nb6 22.Bd2 Nc4–+) 21...Nf8 (21...Bb4 22.bc6 Nc6 23.Nd5 Rc1 24.Qc1 Qd5 25.Be4–/+) 22.Kg2 Rh8 23.Nf1 (23.bc6 A) worse 23...Nc6 24.Qb7 Nd8 25.Qb5 Qb5 26.Nb5+= (26.ab5?? Ra1 27.Bb2 Rah1 28.Nd5 R1h2 29.Kg3 Nb7–+); B) 23...bc6 24.Rb1 Nbd7–+) 23...Ne6 24.Ng3 g6 (24...Bb4 25.Bd2 Nc7 26.Bc8 cb5 27.Bb7–+) 25.Be6 fe6 26.Bd2 Bb4 (26...Qc7 27.Rb1–+) 27.Rb1? (better 27.Nce4 Bd2 28.Nd2 cb5 29.Rc1–/+) 27...Bc3–+ 28.Bc3 Qa4 29.Ra1 (29.bc6 Qc6 30.Qb7 Qc3 31.Qb8 Rb8 32.Rb8 Ke7 33.Rh8 Qe3 34.Rh6–+) 29...Qa1 30.Qa1 Ra1 31.Ba1 cb5 32.Bc3 Kd7 33.Bb4 (33.Be1 Nc6 34.Nf1 Ra8–+) 33...Nc6 34.Bc5 (34.Bd2 b4 35.Ne2 b3–+) 34...b4 35.Ne2 Ra8 36.Nc1 (36.f5 gf5 37.g6 Rg8–+) 36...Ra1 37.Ne2 (37.Nb3 Rb1 38.Nd2 Rb2–+) 37...Ra2 (better 37...b3 38.Nc3–+) 38.Kf2 (38.Kf1–+) 38...b3 39.Ke1 b2 (better 39...Re2 40.Ke2 b2–+) 40.Nc3 Ra1 41.Kd2 b1Q 42.Nb1 Rb1 43.Kc2 Rh1 44.Kd2 (44.Bb6 Rh2 45.Kd1 Nb4–+) 44...Kc7 (44...Rh2 45.Ke1–+) 45.Kc3 (45.Ke2 Rh2 46.Kf1 Na5–+) 45...b6 46.Ba3 Rh3 47.Kd2 b5 (47...Nd4 48.ed4 Ra3 49.Ke2–+) 48.Bb2 (48.Bc1 Rh2 49.Kd1 Na5–+) 48...Kb6 49.Kc3 (49.Bc1 Rh2 50.Kd1 b4–+) 49...Ka5 Black prepares b4 50.Kd2 b4 51.Bc1 Ka4 52.Ke2 b3 53.Kd2 Nb4 54.Kc3 Nd3 (54...Rh2 55.Bd2 Na2 56.Kb2 Rd2 57.Ka1 Nc3 58.f5 b2) 55.Bd2 (55.Kd2 Rh2 56.Kd1 Nc1 57.Ke1 Nd3 58.Kf1 Rf2 59.Kg1 b2 60.f5 b1Q) 55...Ka3 (55...b2 56.Kc2 b1Q 57.Kb1 Kb3 58.Bc1 Rh1 59.f5 Rc1) 56.f5 (56.Bc1 Nc1 57.Kd2 b2 58.Ke1 Nd3 59.Kd2 b1Q 60.f5 Qb2 61.Kd1 Rh1) 56...ef5 (56...Rh2 57.fe6 Nb2 58.e7 Nd1) 57.Bc1 (57.Be1 Ne1 58.Kd2 Rh2 59.Kc1 Rc2 60.Kb1 Nd3 61.Ka1 Rc1) 57...Nc1 58.Kd2 b2 59.Kc2 (59.Kc3 Na2 60.Kc2 Rh2 61.Kb1 Nc3) 59...Ka2 60.Kc3 (60.Kd2 b1Q 61.Ke1 Qc2 62.Kf1 Rh1) 60...b1Q 61.Kd2 Qb2 62.Kd1 (62.Ke1 Rh1) 62…Rh1 0–1. afsharian – soprok (1630), lichess.org, 2018.

3.d4 Nf6 4.c4 a6 5.a4 d5 6.Na3 (6.e3!?+=) 6...dc4–/+ 7.Nc4 ab5 8.Ne5 Nbd7 9.Bg5? (better is 9.Ngf3 Ne5 10.Ne5–/+) 9...Ne5 10.de5 Qd1 11.Rd1 Ne4 12.Bf4 e6 13.ab5 (13.Bd2 ba4 14.e3–+) 13...Bb4 14.Bd2 Nd2 15.Rd2 Ra1 0–1. acaudron (2295) – pierred (2825), net–chess.com, 2015.

3.e3 b6 4.a4 Bb7 5.Bb2 a5 6.Nf3 Nf6 7.Rg1 (7.Be2 e6=) 7...e6 8.g4 h6 9.h4 Bc5 (9...d6 10.g5 hg5 11.hg5=) 10.g5+= hg5 11.hg5 Nh5 12.Be2 Rh7 13.g6 fg6 14.Rg6 (better 14.Bd3 Rh6 15.Bg6 Ke7 16.Bh5 Rh5 17.Bg7+–) 14...Kf7?? (better 14...Nf6+=) 15.Ne5+– Kf8 (15...Kg8 16.Bh5 Qh4 17.Bf3 Bf3 18.Qf3 Qh1 19.Qh1 Rh1 20.Ke2+–) 16.Bh5 Qh4 (16...Kg8 17.Qg4 Bf8 18.Nf7+–) 17.Bf3 c6 18.Rg1 (18.bc6!? dc6 19.Re6 Qh2+–) 18...Ra7 (18...Ke8+–) 19.Ng6 (19.Ng6 Ke8 20.Nh4 Rh4 21.Bg7+–) 1–0. FeegLood (2575) – Xeibi (2135), lichess.org, 2015.

3.e3 c5 4.d4 cd4 5.ed4 d5 6.Bd3 Qb6 7.Ne2 e6 8.0–0 Bd6 9.Qd2 Nd7 10.Na3 Ndf6 11.c4 Bb8 12.Qg5 Qd6 13.Ng3 g6 14.c5 h6? (better is 14...Qe7+/–) 15.Qf6+– (15.cd6?! hg5 16.b6 Bd7=) 15...Qg3 (15...Nf6 16.cd6 Bd6+–) 16.fg3 (16.hg3?! Nf6 17.Rb1 Bc7+=) 16...Nf6 17.Rf6 Ke7 18.Rf2 Bd7 (18...e5 19.de5 Be5 20.Re2+–) 19.Rc2 White prepares the advance c6 19...Bc7 20.c6 bc6 21.bc6 Bc8 22.Bf4 Bb6 23.Nb5 Ba6 24.Bd6 Kd8 25.Be5 Rg8 (25...Ke7 26.Rf1 f5 27.g4+–) 26.Bf6 Kc8 27.Nd6 Kc7 28.Ba6 Kd6 29.Rac1 Rac8 (29...Kc7 30.Be5 Kd8 31.c7 Ke7 32.c8Q Rgc8 33.Bc8+–) 30.c7 Bd4 (30...e5 31.Rc6 Kd7 32.Be5+–) 31.Bd4 1–0. Pcmvr – Klaus_mueller, playchess.de, 2004.

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

3.e3 d6 4.Bb2 Nf6 5.Nf3 e5 6.d4 e4 7.Nfd2 d5 8.c4 Bb4 9.Nc3 Be6 10.Qa4 Bc3 11.Bc3 Nbd7 12.Bb4 a5 13.Ba3 (13.Ba5? b6–+) 13...h5 14.Qc2 Rh6 (14...h4 15.Be2+=) 15.Rc1+– Rg6 16.cd5 Nd5 (16...Bd5 17.Qc7 Qc7 18.Rc7 Ba2 19.Rb7+=) 17.Ne4 N7b6 (17...h4 18.Nd2+–) 18.Nc5+– Qf6 (18...Qe7 19.Qb2+–) 19.Nb7 Ne3 (19...Nb4 20.Qd2 Ba2 21.Na5 Ra5 22.Qb4 Ra7 23.Qf8 Kd7+–) 20.Qc6 Bd7 (20...Nd7 21.Qc7 Ng2 22.Bg2 Rg2 23.Qc8 Qd8 24.Qc6+–) 21.Nd6 (21.Nd6 cd6 22.Qb6 Rg2 23.Bg2 (23.fe3?? Qf2 24.Kd1 Qd2) 23...Ng2 24.Kf1 Ne3 25.Ke2+–) 1–0. FeegLood (2280) – Singer__Marta (2225), lichess.org, 2015.

3.e3 e5 4.Bb2 f6 5.c4 d5 (5...a6 6.d4=) 6.a4 (6.cd5 Qd5 7.Nc3 Qd6+=) 6...Be6= 7.cd5 Qd5 8.Nc3 Qd7 9.Nf3 Ne7 (9...Bb4 10.d4+=) 10.Be2 (10.d4 ed4 11.Nd4 Bg4+–) 10...Ng6 11.d4 ed4 (11...Bd6 12.0–0+=) 12.Nd4+– (worse 12.ed4 Bb4=) 12...Bf7 (12...Bd6 13.Rc1+–) 13.0–0 (13.Bg4 Qd8 14.Qf3 Bb4+–) 13...Be7? (better 13...Ne5+–) 14.Bg4+– Qd8 15.Bf3 (better 15.Qf3 Ne5 16.Qb7+–) 15...Nd7?? (better 15...Qc8+–) 16.Bb7+– 0–0 (16...Nde5 17.Nc6 Qd1 18.Rfd1 0–0+–) 17.Nc6 Qe8 18.Ba8 Bd6 19.Bb7 Nc5 20.Na5 Qe5 Do you see the mate threat? 21.g3 Qf5 22.Bd5 Qh3 (22...Ne5 23.Ba3+–) 23.Bf7 Rf7 24.Qd5 Ne5 (24...Ne7 25.Qc4+–) 25.Qg2 (25.Nc6 Ng4 26.Qg2 Qh5+–) 25...Qh5 26.Nc6 (26.Qa8 Bf8 27.Ba3 Nf3 28.Kg2 Nd2 29.Bc5 Qc5+–) 26...Nf3 27.Kh1 Nd3 28.Ba3 (better 28.Rab1 Rd7+–) 28...f5 (28...Nde1 29.Rfe1 Ne1 30.Re1 Ba3 31.Qd5 Qd5 32.Nd5+–) 29.Bd6 cd6 30.Nd4 (30.Rad1!? Nde5 31.Rd6 h6+–) 30...Nde5 (30...Nd4 31.Qa8 Rf8 32.Qd5 Qf7 33.Qd4+–) 31.Nf3 Nf3 32.Ne2 Rf6 (32...g5 33.Ng1 Ne5 34.Qd5+–) 33.Nf4 Qg4 34.h3 (better 34.Rfc1 Rh6 35.Rc8 Kf7 36.Rc7 Kg8+–) 34...Rh6 35.Ra3 (better 35.b6 ab6 36.Rfc1 g5+–) 35...g5 36.e4?? (better 36.h4 Kf7 37.Qh3 gf4 38.Qg4 fg4 39.Rc1 (worse 39.ef4 Rh5+–; 39.gf4?! Rh4 40.Kg2 Rh2 41.Kg3 h5+–) 39...fg3 40.Rc7 Ke6 41.fg3+–) 36...gf4?? (better 36...fe4 37.Rf3 ef3=) 37.Rf3+– (37.Qf3?? Qh3 38.Kg1 Qh2) 37...Rh3 38.Kg1 fe4 (38...fg3 39.fg3 h6+–) 39.Rf4 Qh5 (39...Qe6 40.Re4 Qf5 41.Rfe1+–) 40.Rh4! Rh4 (40...Qh4 41.gh4 Discovered attack) 41.gh4 Discovered attack 41...Kf7 42.Qg5 (42.Qe4 Qg6 43.Qg6 hg6 44.a5+–) 42...Qg6 (42...Qg5 43.hg5 Ke8+–) 43.Qg6 hg6 44.Re1 (better 44.a5!? Ke6+–) 44...d5 (44...Ke6 45.Re4 Kd5 46.Re7+–) 45.Rd1 (better 45.a5 Ke7 46.b6 ab6+–) 45...Ke6 46.a5 Kd6 (46...Kd7 47.Rd5 Kc7 48.Rc5 Kb7 49.Rc6+–) 47.b6 (better 47.Rc1 e3 48.fe3+–) 47...ab6 48.ab6 Kc6 49.b7! Kb7 Deflection from d5 50.Rd5 Kc6 51.Rg5 Kd6 52.Rg6 Ke5 53.Rg4 Kf5 54.Re4 (better 54.Rg2 Kf4+–) 54...Ke4 55.Kg2 Kf5 (55...Kf4 56.Kh3+–) 56.Kf3 Kg6 57.Kf4 Kh5 58.Kf5 Kh6 59.f4 (better 59.Kg4 Kg6 60.f4 Kf6+–) 59...Kh5 60.Ke6 Kh4 61.f5 Kg5 62.f6 Kf4 63.f7 Ke4 64.f8Q Kd4 65.Qd6 (65.Qf6 Kd3 66.Kd5 Ke3 67.Qf5 Ke2 68.Kd4 Kd2 69.Qf2 Kd1 70.Kd3 Kc1 71.Qc2) 65...Kc4 (65...Ke3 66.Kf5 Ke2 67.Ke4 Kf2 68.Qh2 Ke1 69.Ke3 Kd1 70.Qd2) 66.Qd5 (66.Qf4 Kc5 67.Qe5 Kb4 68.Kd5 Kb3 69.Qg3 Kb2 70.Kd4 Kc2 71.Qc3 Kb1 72.Qd2 Ka1 73.Kc3 Kb1 74.Qb2) 66...Kc3 67.Ke5 Kb4 68.Qd4 (68.Kd4 Ka4 69.Qb7 Ka5 70.Kc4 Ka4 71.Qb4) 68...Kb3 69.Kd5 Kc2 (69...Ka2 70.Kc4 Kb1 71.Qd2 Ka1 72.Kc3 Kb1 73.Qb2) 70.Kc5 (70.Kc4 Kc1 71.Kc3 Kb1 72.Qb6 Kc1 73.Qg1) 70...Kb3 71.Qc4 Kb2 72.Qd3 (72.Kb4 Kb1 73.Kb3 Ka1 74.Qf1) 72...Ka2 (72...Kc1 73.Kb4 Kb2 74.Qd2 Kb1 75.Kc3 Ka1 76.Qb2) 73.Kc4 Kb2 74.Kb4 (74.Qe2 Kc1 75.Kc3 Kb1 76.Qb2) 74...Ka2 75.Qd2 Ka1 (75...Kb1 76.Kc3 Ka1 77.Qb2) 76.Kb3 Kb1 77.Qd1 (77.Qe1) 1–0. BeepBeepImAJeep (2655) – Geck0 (2395), lichess.org, 2016.

3.e3 Nf6 4.Nf3 g6 5.Bb2 Bg7 6.Be2 0–0 7.0–0 c6 8.c4 a6 9.a4 d5 10.cd5 Qd5 11.Nc3 Qd6 12.Ba3 c5 13.d4 b6 14.ba6 (14.a5!? Nfd7 15.ab6 ab5 16.Nb5 Qb6 17.dc5+/–) 14...Na6= 15.Nb5 Qd8 16.Qc2 Bb7 17.Rfd1 Nd5 18.dc5 (better is 18.e4!? Ndb4 19.Qb1+=) 18...Ba1+= 19.Ra1 bc5 20.Rd1 Qc8 21.Bc4 (21.Bb2!?–/+) 21...Nab4–+ 22.Qb3 Rd8 (better is 22...Nb6–+) 23.Bb4 cb4 24.Bd5? (better is 24.e4 Nf4 25.Rd8 (worse is 25.Bf7 Kg7 26.Rd8 Qd8–/+) 25...Qd8 26.g3+= (worse is 26.Bf7 Kg7–+)) 24...Bd5–+ 25.Rd5?? (25.Qb4 Bf3 26.Rd8 Qd8 27.gf3 Qd1 28.Kg2 Qa4 29.Qa4 Ra4 30.f4–+) 25...Rd5 (25...Qc1 26.Rd1 Rd1 27.Qd1 Qd1 28.Ne1 Qe1) 26.Qd5 (26.h3 Qc5 27.Kh2–+) 26...Qc1 0–1. Fournier,Frederic (1775) – Eisloewen (1740), rated blitz game, 2002.

3.e4 d6 4.d4 Nd7 5.Nf3 e5 6.Bc4 Ngf6 (6...ed4 7.Qd4 Nb6 8.Bd3+=) 7.de5+/– Ne5 8.Ne5 Be6? (better is 8...de5 9.Bf7 Kf7 10.Qd8 Bb4 11.Qd2 Bd2 12.Nd2 a6+/–) 9.Be6+– fe6 10.Nd3 Ne4 11.0–0 (11.Qg4 d5+–) 11...Qd7 12.Qf3 d5 13.Nc3! Nc3 14.Ne5 Qe7 15.Qc3 0–0–0 (15...Qd6 16.Bf4 Qe7 17.Be3+–) 16.Qa5 (better is 16.Be3!? Rg8+–) 16...Qf6 17.Nf3 Bc5? (17...h6+–) 18.Bg5 Bb6 19.Qb4 (19.Qb4 Qf5 20.Bd8 Rd8 21.Rae1 Qc2 22.Qe7+–) 1–0. Taulien,Hans_Juergen (2350) – Matzen,Jan (1740), remoteschach.de, 2006.

3.e4 e6 4.d4 d5 5.e5 c5 6.Nf3 cd4 7.Bd3 (7.Qd4 Qc7+=) 7...Bc5 8.Bf4 (8.0–0 Nd7=) 8...Ne7 9.Nbd2 Ng6 (9...Bb4 10.0–0+=) 10.Bg3 Nd7 11.Qe2 Bb6 12.h4 (12.0–0 Qc7=) 12...Nc5 13.h5 Ne7 14.Bf4 h6 (14...Ba5 A) 15.Nd4? A1) 15...Nd3?! 16.Qd3 (worse is 16.cd3 Bc3 17.N4b3 Ba1 18.Na1 Bd7–+) 16...Qc7 17.Rd1=; A2) 15...Bc3–+; B) 15.h6 gh6 B1) 16.Nd4? B11) 16...Nd3?! 17.Qd3 (17.cd3? Bc3 18.N4b3 Ba1 19.Na1 Bd7–+) 17...Ng6 18.Bg3=; B12) 16...Bc3–+; B2) 16.Bh6+=) 15.Rh4 (better is 15.Nd4!? Nd3 16.Qd3=) 15...Nd3 16.cd3 Bd7 17.a4 (17.Nb3 Bb5 18.Nbd4 Bd4 19.Nd4 Nc6–/+) 17...Qc7 18.Rg4 Nf5 19.Kf1 Qc3 20.Ra2 (20.Rb1 Qa3 21.Qd1 Qd3 22.Ke1 Ba5–+) 20...a6–+ 21.ba6 Ra6 22.g3 (22.Nb1 Qb3 23.Qc2 Ba4 24.Qb3 Bb3 25.Ra6 ba6–+) 22...Ba4 23.Nh4 (23.Nb1 Qc6 24.Qd2–+) 23...Bd1! (23...Bd1 24.Qd1 Ra2–+) 0–1. Ihaveagirlfriend – Gorgol, ChessWorld.net, 2004.

3.e4 Nf6 4.e5+= Ng8 5.Nf3 d6 6.Nc3 (6.Bb2 de5 7.Ne5 Nd7+=) 6...de5= 7.Bc4 e6 8.Ne5 Nd7 9.Nf3 Ngf6 10.0–0 Be7 (10...Bd6 11.d4=) 11.Bb2 0–0 12.Qe2 h6 (12...Nb6 13.Bd3=) 13.Rfe1+= Nh7 (13...Nb6 14.Bd3+=) 14.d4 Ng5 15.Ne5 (15.Ng5 Bg5 16.Ne4 Be7+–) 15...Ne5 (15...Nb6 16.Rad1+=) 16.de5 (worse 16.Qe5 Bf6 17.Qf4 Qd4 18.Qd4 Bd4=+) 16...Bd7 17.Red1 Qc8 18.h4 (18.f4 Nh7+–) 18...Nh7+= 19.Qg4 Re8 (19...c6 20.a4+=) 20.Ne4+– b6? (better 20...Kh8+–) 21.Nf6+– Bf6 22.ef6 g6 23.Qf4 g5 (23...Kh8 24.Qh6 Rg8+–) 24.hg5 Ng5 (24...Bc6 25.g6 Ng5+–) 25.Qh2 Kh7 (25...Kh8 26.Qh6 Kg8 27.Qg7) 26.Bd3 Kg8 (26...Ne4 27.Be4 Kg8 28.Qg3 Kh8 29.Qg7) 27.Qh6 (27.Qh6 Nf3 28.gf3 Bb5 29.Qg7) 1–0. Janek – Tundja, internet, 2017.

3.Nf3 d5 4.e3 c6 (4...Nf6 5.c4+=) 5.c4 cb5 6.cb5 b6 (6...Nf6 7.Nc3+=) 7.Bb2 f6? (better 7...Nf6!?+–) 8.Nc3+– Bb7 9.Be2 e5 10.d3 (better 10.Qb3!?+–) 10...Bd6+– 11.0–0 Nh6? (11...Ne7!?+–) 12.Nd2 (12.Qb3 Nd7 13.d4 0–0+–) 12...Nf7 13.f4 (13.Qb3 Nd7 14.d4 f5 15.Nd5 0–0+–) 13...Nd7 (13...ef4 14.ef4 (worse 14.Rf4 Bf4 15.ef4 0–0–/+) 14...0–0 15.d4+=) 14.Bh5 (better 14.Bf3 Nc5 15.Qc2+–) 14...0–0= 15.fe5 (15.Nb3 f5=) 15...Nde5 16.d4 Nd3 17.Qc2 Nb2 18.Qb2 Qe7 19.Bf7 (better 19.Rae1!?=+) 19...Rf7–/+ (19...Kf7?! 20.e4 de4 21.Nde4 Bh2 22.Kh2 Be4 23.Qb3 Kg6 24.Rae1 Qd6 25.g3=; worse 19...Qf7 20.e4=+) 20.Rae1 Qc7 21.Nf3 Rc8 22.Rc1 Qd7 23.a4 Re7 24.Ne2 (24.Qa2 Kh8 25.Qd2–/+ (25.Nd5?? Rc1 26.Rc1 Bd5 27.Qd5 Bh2 28.Nh2 Qd5 29.Rc8 Qg8 30.Rg8 Kg8–+)) 24...Re3 25.Rc8 Bc8 26.Qc1?? (26.Qd2 Qe6 27.Kf2 Ra3–+) 26...Re8 (better 26...Re2 27.Rf2 Re7–+) 27.Nc3 Bb4 28.Nd2 (28.Qb2 Ba5–+) 28...Bb7 29.Na2 Bd6 30.Re1 Re1 (30...Bf4 31.Nb4–+) 31.Qe1 Qc7 32.Nf3 Kf7 33.Qc1 Qc1 34.Nc1 Bf4 35.Nd3 Bd6 36.Nfe1?? (36.Nc1 Bc8 37.Kf2–+) 36...g5 37.Nc2 a6 38.Ndb4 ab5 39.ab5 Ke7 40.g3 h5 41.Kg2 Ke6 42.Na2 f5 43.Nc3 f4 44.Kf3 fg3 45.hg3 Kf5 46.Ne3 Ke6 47.Na4?? (47.Nc2 Bc8 48.Na4–+) 47...Bc7–+ 48.Nc3 ½–½. Darkseid (1890) – BoardFlak (1955), ChessWorld.net, 2013.

3.Nf3 e6 4.Ba3 Ba3 5.Na3 d5 6.e4 (better is 6.e3!?=) 6...de4 7.Bc4? (7.Ne5 Ne7–/+) 7...Nf6 (7...ef3 8.Qf3 Nf6 9.Rd1–+) 8.Ne5? (8.Ng5 h6 9.Nh3 e5–+) 8...0–0?? (better is 8...Qd6!? 9.Nf7 Kf7 10.Qc1–+) 9.d4 (9.Ng4 a6 10.Nf6 Qf6–/+) 9...c6 (9...Qd6 10.Nb1 Qb4 11.Nd2–+) 10.b6 (better is 10.Qd2!?–/+) 10...ab6–+ 11.Qc1?? (better is 11.Nb1–+) 11...b5 (11...Qd4 12.0–0 Qe5 13.Be2–+) 12.Nb5 (12.c3 bc4 13.Nac4 Nd5–+) 12...cb5 13.Bb3 Nc6 (13...Qd4 14.f4–+) 14.0–0 (14.c3 Ne5 15.de5 Nd5–+) 14...Nd4 (14...Qd4 15.Nc6 bc6 16.Rd1–+) 15.Re1 Nb3 (15...Qc7 16.Qg5–+) 16.cb3 Nd7 (16...Qd6 17.Qb2–+) 17.Ng4 (17.Re4 Qf6 18.Qe1–+) 17...Nf6 (17...Qh4 18.Qd1–+) 18.Ne5 Nd7 (18...Qd6 19.Qb2–+) 19.Ng4 Nf6 (better is 19...f5 20.Ne3 Ne5–+) 20.Ne5= ½–½. Dufus – CharlesC, chess.net, 1998.

3.Nf3 Nf6 4.Bb2 e6 5.e3 Be7 6.d4 d5 7.Nbd2 0–0 8.c4 a6 9.a4 ab5 10.cb5 b6 11.Bd3 h6 (11...c5 12.dc5 bc5 13.Bc3=) 12.0–0+= c6 13.Qe2 cb5 (13...Qc7 14.Rfc1 Bb7 15.Ne5+–) 14.Bb5 (14.ab5 Ra1 15.Ra1 Nbd7+–) 14...Bd7 15.Ne5 Bb5 16.Qb5 (16.ab5 Ra1 17.Ra1 Bb4+=) 16...Ra5= 17.Qd3 Bd6 18.Ndf3 (18.Bc3 Ra8=) 18...Ne4 19.Rfc1 Be5 (19...Qe8 20.Qb3=) 20.Ne5+= Qd6? (better 20...Nd7+=) 21.Ba3+– Qd8 22.Bf8 Qf8 23.f3 (better 23.Rc7+–) 23...Nf6? (23...Nd6 24.Rab1 Qd8 25.Qc2+–) 24.Qb3 (better 24.Rc7 Na6 25.Rf7 Qf7 26.Nf7 Kf7 27.Qc2+–) 24...Qd8 25.Nc6 Nc6 26.Rc6 b5 (26...Nd7 27.Rac1 Ra8 28.Qb5+–) 27.Qb4 (better 27.Qc3!? Ra8 28.ab5 Rb8+–) 27...Ra4 28.Ra4 ba4 29.Qa4 Qb8 (29...g6+–) 30.Ra6?? (better 30.Qc2 Ne8 31.Rc8+–) 30...Qb1+= 31.Kf2 Kh7? (better 31...Qb2!? 32.Kg3 Qc3 33.Ra8 Kh7+=) 32.Qa1 Qc2 33.Kg3?? (better 33.Kg1+–) 33...Nh5–/+ 34.Kh3 Qf5 35.Kh4 Qg5 36.Kh3 Qf5?? (36...Qe3 37.Qf1 Nf4 38.Kg3 g5–+) 37.Kh4= Nf6 (better 37...Qg5 38.Kh3 Qe3–/+) 38.Qf1?? (better 38.Ra3+–) 38...g5–+ 39.Kg3 Nh5 (better 39...Ne4 40.fe4 Qf1–+) 40.Kf2+– Qc2 41.Qe2 Qf5?? (41...Qc7 42.g3+–) 42.Ra7 (better 42.g4!? Qg6 43.gh5 Qh5 44.Qc2 Kg7+–) 42...Nf6 (42...Qg6 43.Kg1+–) 43.g4 (better 43.Rf7 Kg6 44.Rb7+–) 43...Ne4?? (better 43...Ng4 44.Kg2 Nf6+–) 44.Kg2 Qf6 (44...Qg6 45.fe4 Qe4 46.Qf3 Qf3 47.Kf3+–) 45.fe4 de4 46.Qf2 Qf2 (46...Kg6 47.Qf6 Kf6 48.Ra5+–) 47.Kf2 Kg6 48.Kg3 f5 (48...Kf6 49.Ra5+–) 49.gf5 Kf5 50.Rh7 (50.Ra5!? Kf6+–) 50...Kg6 51.Rh8 h5 52.h4 g4 (52...gh4 53.Kh4 Kg7 54.Rh5+–) 53.Re8 (better 53.Rg8!? Kf7 54.Rg5 Kf6+–) 53...Kf7 54.Rh8 Kg6 55.Ra8 Kf6 56.Kf4 e5 (56...Kg7+–) 57.de5 Kg6 (57...Ke6 58.Ra6 Kf7 59.Kf5 Kg7 60.e6 Kg8 61.Ra8 Kg7 62.e7 g3 63.e8Q g2 64.Qg6) 58.Ra6 Kf7 (58...Kh7 59.Kg5 Kg7 60.Ra7 Kf8 61.e6 Kg8 62.Ra8 Kg7 63.e7 g3 64.e8Q g2 65.Qd7) 59.Ke4 (59.Kf5 Kg7 60.e6 Kh6 61.e7 Kh7 62.e8Q Kg7 63.Qd7 Kf8 64.Ra8) 59...g3+– 60.Kf3 (60.Kf5 g2 61.Rg6 Ke7 62.Rg2 Kd7 63.Rc2 Ke7 64.e4 Kd7 65.Kf6 Ke8 66.e6 Kd8 67.e5 Ke8 68.Rc8) 60...g2 61.Kg2 Ke7 62.Kg3 Kd7 63.Kf4 Kc7 64.Kg5 Kb7 65.Rh6 Kc7 If Black now only could play e6... 66.Kh5 Kd7 67.Rg6 Ke7 (67...Kc7 68.Rd6 Kb7 69.e6 Ka7 70.e7 Kb7 71.e8Q Ka7 72.Qe7 Kb8 73.Rd8) 68.Kg5 Kf7 69.Rf6 Ke7 70.h5 Ke8 71.h6 Kd7 72.h7 Kc7 (72...Ke8 73.h8Q Kd7 74.Qg7 Ke8 75.Rf8) 73.h8Q Kb7 (73...Kd7 74.Qg7 Ke8 75.Rf8) 74.e6 (74.Qg7 Kc8 75.Rf8) 74...Kc6 (74...Kb6 75.e7 Kc5 76.Qc8 Kb5 77.Qc3 Ka4 78.e8Q) 75.e7 Kd5 (75...Kb5 76.e8Q Kc4 77.Qe4 Kc5 78.Qf8 Kb5 79.Qfb4) 76.e4! Ke4 (76...Ke4 77.Qd8 Mate attack) 77.e8Q (77.Qd8 Ke5 78.e8Q) 77...Kd5 (77...Kd3 78.Rc6 Kd2 79.Qd4) 78.Qg7 (78.Qc6 Ke5 79.Rf8) 78...Kc5 (78...Kc4 79.Rc6 Kb3 80.Qb7 Ka3 81.Ra6) 79.Qgd7 Kc4 80.Qec8 (80.Qb8 Kc5 81.Qbb5) 80...Kb4 81.Qdb7 (81.Qdb7 Ka4 82.Ra6; 81.Rb6 Ka5 82.Qc5) 1–0. Dino_Jarach (1795) – Seaborgium (1780), lichess.org, 2019.

3.g3 g6 4.Bb2 Nf6 5.Bg2 Bg7 6.Nf3 c6 7.c4 cb5 8.cb5 b6 (8...a6!?+=) 9.Ne5 Nc6?? (better 9...d5+–) 10.bc6+– dc6 (10...d6 11.Nd3 Bf5 12.c7+–) 11.Bc6 Bd7 (11...Nd7 12.f4 f6 13.Ng6 hg6 14.Ba8+–) 12.Ba8 (better 12.Nd7 Rc8 13.Ne5 Kf8 14.Qb3+–) 12...Qa8 13.Nd7 (better 13.f3 Qb7 14.Na3+–) 13…Qh1 0–1. hamidrezaderakhshan – alirexapoker, Casual Correspondence game, 2020.

3.Bb2 a6

4.a4 a5 5.e4+= b6 6.Nc3 d6 7.Bc4 Bb7 8.Nh3 c5 9.bc6! Nc6 (9...Bc6 10.d4 Combination; 9...Nc6 10.Qf3 Combination) 10.0–0 Ne5 11.Bb5 Bc6 12.f4 Bb5 13.Nb5 Nc4 14.Bc1 d5 15.e5 f6? (better is 15...d4+–) 16.d3 fe5 (16...Ne5 17.fe5 Rc8 18.Nf4+–) 17.dc4 ef4 (17...Rc8 18.fe5 Rc4+–) 18.Nf4 g5 (18...Nf6 19.Ne6 Qb8+–) 19.Ne6 dc4 20.Rf8# 1–0. marekt – GazBennett, ChessWorld.net, 2012.

4.ba6 Na6 5.g3 c6 6.Bg2 b5 7.Nf3 Bb7 8.e3 g6?? (better 8...Qa5=) 9.Bh8+– f6 10.d3 (better 10.a4 Nh6 11.ab5 cb5+–) 10...Nh6 11.Nbd2 d5 (11...Nf7 12.Bf6! ef6 13.0–0+–) 12.Nh4 (12.a4 Nf7 13.ab5 cb5 14.Bf6 ef6+–) 12...Qd7 (12...Nf7 13.Bf6! ef6 14.0–0+–) 13.c3 (better 13.Qf3+–) 13...0–0–0? (13...Nf7 14.Bf6! ef6 15.0–0+–) 14.Qb3 (better 14.a4!? ba4 15.Qa4 Nf7 16.Bf6 ef6+–) 14...Nf7 15.Bf6! ef6 16.a4 (16.d4!? Re8+–) 16...Nc5 17.Qb1 Na4 18.Qb3 Nc5 19.Qb1 Ne5?? (19...Na4 20.0–0 Nc3+–) 20.d4+– Ned3 (20...g5 21.de5 (21.dc5?! gh4 22.Nb3 Re8+–) 21...gh4 22.ef6+–) 21.Ke2 Ne4 (21...Qe6 22.dc5 Nc5 23.Ra7+–) 22.Qd3 Nd2 23.Qd2 Qe6 24.Nf3 f5 25.Rhe1 Bh6 26.Kf1 g5 27.Qc1 (27.Ra7 Re8+–) 27...Kc7 28.Ra7 Rb8 29.Ne5 Bg7 30.Nf3 g4?? (30...Bh6 31.Qa3 g4 32.Qa5 Kc8+–) 31.Nh4 Bf6 32.e4! fe4 (32...de4 33.Qf4 Double attack; 32...fe4 33.Qf4 Pinning) 33.Qh6 (33.Qf4 Qd6 34.Qg4 Qf8+–) 33...Qe7 (33...Ra8 34.Ra8 Ba8 35.Qf4 Kb6 36.Nf5+–) 34.Nf5 Qf7 (34...Bg5 35.Qh5 Qd8+–) 35.Qf4 Kb6 36.Rea1 (better 36.Qb8 Be5 37.de5+–) 36...h5 37.Nd6 (37.Qb8 Bd4 38.cd4 b4 39.R1a6 Kb5 40.Nd6) 37...Qc7 38.Nb7 (38.Nc4 bc4 39.Rb1 Ka7 40.Qc7 Ka8 41.Qa5 Ba6 42.Qa6) 38...Rb7 (38...Qf4 39.R1a6 Kc7 40.Na5 Kd8 41.gf4+–) 39.Rb7 (39.R1a6) 39...Kb7 40.Qf6 1–0. alessandrocarvalhaes (1820) – ciow (1770), lichess.org, 2019.

4.a4 ab5 5.ab5 Ra1

6.Ba1 b6 A) 7.g3 Bb7 (7...Nf6 8.Bg2 d5 9.Nf3 Nbd7 10.c4 e6; 7...e6 8.Nf3 Bb7 9.c4 Nf6 10.Bg2 Be7; 7...d5 8.Nf3 Nf6 9.Bg2 e6 10.c4 Bd6; 7...c5 8.Bg2 Nf6 9.c4 d6 10.Nf3 Nbd7) 8.Nf3 Nf6 9.Bg2 d5 10.c4 dc4; B) 7.Nf3 e6 (7...Nf6 8.e3 Bb7 9.Bb2 d6 10.Be2 e5) 8.Nc3 Bb7 9.e4 Nf6 10.e5 Nh5.

6.Ba1 d5 7.e3 (7.c4 Nf6 (7...Qd6 8.cd5 Nd7 9.Qc2 Ngf6 10.e4 Qb4) 8.Nf3 e6 9.Bd4 Nbd7 10.cd5 ed5) 7...f6 (7...Nf6 8.Bf6 ef6 9.Nc3= (9.Ne2 Bb4 10.Nf4 c6) 9...Bb4 10.Bd3 Qd6; 7...Nd7 8.f4 Nc5 9.Nf3 Bg4 10.Be2 Nf6; 7...e6 8.f4 Nf6 9.Nf3 Bd6 10.Be2 Nbd7) 8.Bd3 (8.Nc3 e6+– 9.Nge2 e5 10.Ng3 Be6; 8.c4 e5 9.cd5 Ne7 10.e4 Kf7) 8...e5 (8...Nh6 9.Nc3 e5 10.Nh3= Be6) 9.Qh5 Ke7 10.Bb2 (10.Nc3!? Nh6 11.e4+=) 10...Nh6+= (10...Qe8+= 0.70) 11.Ba3 Ke6 12.Bf8 g6?? (better 12...Qf8 13.e4 de4 14.Be4 f5+=) 13.Qh6+– Rf8 (13...Qf8 14.Qh4 Kf7+–) 14.Qh7 e4 15.Be2 Kd6 (15...Nd7 16.c4 c6 17.Nc3+–) 16.Qg6 (16.c4 Bf5+–) 16...c6 (16...Rg8 17.Qh6 Rg2+–) 17.Qg3 (17.Qg3 Ke7 18.Qb8+–) 1–0. Pierre – Wewte, internet, 2020.

6.Ba1 d6 A) 7.g3 Nd7 (7...Nf6 8.Nf3 Nbd7 9.Bg2 g6 10.0–0 Bg7) 8.Nf3 Ngf6 9.Bg2 g6 10.0–0 Bg7; B) 7.e4 Nd7 (7...Nf6 8.Nc3 g6 9.Nf3 Nbd7 10.d4 Bg7) 8.Nc3 Ngf6 9.d4 Nb6 10.Nf3 g6; C) 7.Nc3 Nf6 (7...Nd7 8.Nf3 Ngf6 9.e3 e5 10.Bc4 Be7) 8.Nf3 Nbd7 9.e3 e5 10.Be2 d5.

6.Ba1 c6

7.Nc3 Nf6 (7...d5 8.Nf3 Nf6 9.bc6 bc6 10.g3 Nbd7) 8.Nf3 d5 9.e3 Nbd7 10.Bb2 e5.

7.c4 Qa5 8.Bc3+= Qa2 9.e3 Nh6 (9...d6 10.bc6 bc6 11.d4+=) 10.Nf3 Ng4 (10...d6 11.bc6 bc6 12.d4+=) 11.h3 Nh6 12.Be2 Rg8 (12...d6 13.e4+–) 13.0–0+– d6 14.Bd3 (14.Ng5 cb5 15.cb5 Rh8+–) 14...g6 15.Ng5 cb5 16.Qe2 Nd7 (16...bc4 17.Bc4 Qc2 18.e4+–) 17.cb5 Bg7 18.Bc4 Qc2 (18...Qa4 19.Bg7 Rg7 20.d4+–) 19.Nh7 (19.Bf7 Nf7 20.Qc4 Qf5 21.Qc8 Nd8+–) 19...Nb6+– 20.Bd3 Qb3 21.Rc1 Bd7 22.e4 Na4 23.Bc4 Nc3 24.dc3 (24.Bb3?? Ne2 25.Kf1 Nc1–+; 24.Nc3?! Qa3 25.Qf1 Qc5+–) 24...Qa4 25.Rc2 Qa1 26.Qd1 Qa4 27.Qd3 Qa1?? (better 27...Qa7+–) 28.Ra2 Qa2 29.Ba2 Kd8 30.Bd5 Rh8 (30...b6 31.Ng5 e6 32.Be6 fe6 33.Qd6+–) 31.Ng5 Kc7 32.Nf7 Nf7 33.Bf7 Ra8 (33...g5 34.Qe3 Bf6 35.b6 Kd8 36.Bd5+–) 34.Bg6 Be5 35.f4! Bf4 36.Qc4 (36.Qc4 Kb6 37.Qd4 Kb5 38.e5+–) 1–0. DEFFM – GuestHQXM, freechess.org, 2018.

7.c4 cb5 8.cb5 d5 9.Nf3=.

7.c4 Qb6 8.Qb3 (8.e3 d6+=) 8...cb5 (8...d6 9.Nf3=) 9.Qb5 Qe6 (9...Qb5 10.cb5 d5 11.Bd4=) 10.e3 Nf6 11.Nf3 b6 (11...Qa6!? 12.Bf6 Qb5 13.cb5 gf6+=) 12.Be5 Ba6 13.Qb3 d6 14.Qb6?? (14.Bf6 gf6 15.Qb6 Qc8+/–) 14...Qc8?? (better is 14...Nfd7 15.Qc7 de5+=) 15.Bf6+/– ef6 (15...Nd7 16.Qb3 Nf6 17.d4+/–) 16.Be2 Be7 17.0–0 0–0 18.d3 d5 (18...Nd7 19.Qd4+–) 19.cd5 Nd7 20.Qb2 Bd6 21.e4 (21.Rc1 Qa8 22.Rc6 Bb8+–) 21...Ne5 22.Nbd2 (22.Rc1 Qb8 23.Qb8 Rb8+–) 22...Nf3 (22...Bd3!? 23.Bd3 Nd3+/–) 23.Nf3+– (23.gf3? Qh3 24.f4 Bf4–+; 23.Bf3?! Bd3 24.Rc1 Qd7+/–) 23...Be5 (23...Qd7 24.d4 Rb8 25.Qc2+–) 24.d4 (24.Ne5 fe5 25.Ra1 Re8+–) 24...Bd6 (24...Be2 25.Qe2 (25.de5?! Bf1 26.Kf1 fe5=) 25...Bf4 26.Ra1+–) 25.e5 (25.Rc1 Qb7 26.Qb7 Bb7+–) 25...fe5 26.de5 Bc5 27.Ba6 Qa6 28.Ra1 Qc8 (28...Qc4 29.d6+–) 29.Qb5 Re8 (29...Ba3 30.Nd4 Qc3 31.Rd1+–) 30.d6 (better is 30.Rc1 Bf2 31.Kf2 Qa8+–) 30...Qe6 (30...Rf8+–) 31.Ng5 (better is 31.Qc5 Rc8 32.Nd4 Rc5 33.Ne6 fe6 34.d7+–) 31...Qe5= 32.d7?? (better is 32.Rb1 Bd6 33.Qe5 Re5 34.Rd1=) 32...Rd8 (better is 32...Qa1 33.Qf1 Qf1 34.Kf1 Rd8–+) 33.Nf7?? (better is 33.Rb1 Qg5 34.Qe2–+) 33...Qa1 (33...Qa1 34.Qf1 Qf1 35.Kf1 Kf7–+) 0–1. kamera – NN, GameColony.com, 2002.

7.c4 d6 8.Qa4 Bd7 9.Nc3 Nf6 10.Nf3 cb5.

7.c4 Nf6 8.Nc3 Qa5 9.Nf3 d6 10.e3 Nbd7.

7.e3 d5 (7...Nf6 8.Nf3 d5 9.c4 e6 10.bc6 bc6) 8.Nf3 Nf6 9.c4 e6 10.Bd4 Nbd7.

7.e4 d5 (7...d6 8.Nf3 Nf6 9.Nc3 Nbd7 10.bc6 bc6) 8.ed5 cd5 9.Nf3 Nd7 10.Bd4 f6.

7.Nf3 d5+=.

3.Bb2 b6

4.Nc3 a6 A) 5.e3 Bb7 (5...Nf6 6.Nf3 e6 7.Bd3 ab5 8.Bb5 c6 9.Bd3 d5 10.e4 Bc5 11.e5 Ng4; 5...d5 6.Nf3 ab5 7.Nb5 c6 8.Nbd4 f6 9.Ne2 e5 10.d4 e4 11.Nd2 Bg4; 5...c6 6.a4 Nf6 7.Nf3 d5 8.Be2 Qc7 9.Nb1 e6 10.Bd4 Nfd7 11.0–0 e5; 5...e5 6.Nf3 d6 7.d4 ed4 8.Nd4 d5 9.a4 Nf6 10.Bd3 Bb4 11.0–0 0–0; 5...ab5 6.Bb5 Bb7 7.Nf3 Nf6 8.a3 e6 9.0–0 Be7 10.Qe2 0–0 11.Rfb1 d5) 6.Nf3 Nf6 7.a4 e6 8.Be2 Bb4 9.0–0 0–0 10.Ne5 d5 11.Rb1 ab5; B) 5.Nf3 ab5 (5...Bb7 6.e3 Nf6 7.Bc4 e6 8.a4 Bb4 9.0–0 0–0 10.Ne5 d5 11.Bd3 c5; 5...e6 6.e3 Nf6 7.a4 Bb4 8.Be2 0–0 9.0–0 Bb7 10.Ne5 d5 11.Rb1 Bd6) 6.Nb5 Nf6 7.Nc3 Bb7 8.e3 e6 9.Bc4 d5 10.Be2 Bc5 11.Bb5 c6; C) 5.e4 Bb7 (5...e6 6.a4 Bb7 7.a5 ba5 8.Ra5 c6 9.Qa1 cb5 10.Bb5 Nf6 11.f3 Nc6; 5...d6 6.Nf3 Nf6 7.a4 e5 8.Bc4 Bb7 9.Ng5 d5 10.ed5 ab5 11.ab5 Bd6) 6.Qf3 Nf6 7.a4 e6 8.Bc4 Ra7 9.Nge2 d5 10.ed5 ed5 11.Bd3 Be7.

4.Nc3 Bb7 A) 5.Nf3 Nf6 (5...a6 6.ba6 Na6 7.e4 e6 8.Be2 Nf6 9.e5 Nh5 10.0–0 Nf4 11.Bb5 Be7; 5...e6 6.e4 a6 7.a4 Nf6 8.a5 ab5 9.e5 Nd5 10.Nd5 Bd5 11.ab6 Ra1) 6.e3 a6 7.Be2 e6 8.a4 Bb4 9.0–0 0–0 10.Nd4 e5 11.Nf5 Re8; B) 5.e4 a6 6.Nf3 Nf6 7.e5 Nd5 8.Nd5 Bd5 9.c4 Bb7 10.Be2 ab5 11.cb5 Bd5; C) 5.e3 Nf6 (5...a6 6.Nf3 Nf6 7.Bc4 e6 8.a4 Be7 9.0–0 0–0 10.Ne5 d6 11.Ng4 c6; 5...e6 6.Nf3 a6 7.Be2 Nf6 8.a4 Bb4 9.0–0 0–0 10.Nd4 e5 11.Nf5 Re8) 6.Nf3 a6 7.a4 e6 8.Be2 Bb4 9.0–0 0–0 10.Nd4 e5 11.Nf5 d6.

4.Nc3 Nf6 A) 5.Nf3 Bb7 (5...a6 6.e3 e6 7.Bd3 ab5 8.Nb5 Be7 9.0–0 0–0 10.c4 Bb7 11.Be2 Na6; 5...d5 6.e3 a6 7.a4 e6 8.Bd3 Bb4 9.0–0 0–0 10.Ne5 Bb7 11.Qe2 Qd6; 5...e6 6.e3 a6 7.a4 d5 8.Bd3 c5 9.ba6 Ba6 10.Nb5 c4 11.Be2 Nbd7) 6.e3 a6 7.Be2 e6 8.a4 Bb4 9.0–0 0–0 10.Nd4 e5 11.Nf5 d6; B) 5.e3 a6 (5...Bb7 6.Nf3 a6 7.Bc4 e6 8.a4 Bb4 9.0–0 0–0 10.Ne5 d5 11.Be2 c5; 5...e5 6.e4 Bc5 7.Na4 Bd6 8.Nf3 a6 9.d4 Ne4 10.de5 Bb4 11.c3 ab5; 5...e6 6.Nf3 a6 7.Bd3 ab5 8.Bb5 Bb7 9.a3 Be7 10.0–0 0–0 11.Qe2 d6; 5...d5 6.Nf3 a6 7.a4 e6 8.Bd3 Nbd7 9.Nd4 Nc5 10.Nc6 Qd6 11.Ne2 Nfd7; 5...d6 6.Qf3 d5 7.e4 e6 8.e5 Nfd7 9.Qg3 a6 10.Nf3 c6 11.a4 c5) 6.Nf3 ab5 7.Bb5 c6 8.Bd3 d6 9.Be2 e5 10.e4 Be7 11.d4 Nbd7; C) 5.e4 Bb7 6.e5 Ne4 7.Qf3 Nc5 8.Qe3 a6 9.Nf3 ab5 10.Bb5 Nca6 11.0–0 e6.

4.c4 Nf6 5.e3 c6 6.Bd3 c5 (better 6...a6=) 7.Be4?? (better 7.Qf3 d5 8.Bf6 ef6 9.Nc3+–) 7...Ne4–+ 8.Ne2 (8.d3 Nd6 9.Nf3–+) 8...f5 (better 8...d5 9.Nbc3 e6–+) 9.Nf4 e5 (9...h5–+) 10.Nd5? (better 10.Qh5 g6 11.Ng6=+) 10...Bb7 11.Be5 Bd5 12.cd5 d6 (better 12...Qe7 13.Bb2 Nd6–+) 13.Qh5?? (better 13.Bb2–+) 13...g6 14.Qd1 de5 15.d3 (15.Nc3 Nf6–+) 15...Nd6 (15...Nf6 16.e4–+) 16.0–0 (16.Nc3 Bg7–+) 16...a5 (16...Nb5 17.Qa4 Qd7 18.Qb3–+) 17.f4 (17.Nc3 Bg7–+) 17...Be7 (better 17...ef4!? 18.ef4 Bg7 19.Na3 Ba1 20.Re1 Kf7 21.Qa1–+) 18.Nc3 (18.fe5 Nf7 19.d6 Bg5–+) 18...Nd7 19.Na4 (19.fe5 Ne5 20.d4 Ng4–+) 19...g5 (better 19...ef4 20.Rf4 Bg5 21.Rf3–+) 20.Qh5 Nf7 21.h4 (21.fe5 Nde5 22.Rf5–+) 21...Nf6 22.Qf3 (22.Qe2 ef4 23.hg5 Nd5 24.ef4 Qd6–+) 22...Qd5 (22...e4!? 23.de4 fe4 24.Qf2 gh4 25.Rad1–+) 23.Nb6 (23.fg5 Qf3 24.Rf3 Nd5–+) 23...Qf3 24.Rf3 Rb8 25.Nc4 (25.fg5 Rb6 26.gf6 Rf6–+) 25...Rb5 (better 25...e4!? 26.de4 g4 27.Rff1 Ne4 28.a4–+) 26.fe5 Nd5 27.Rf5 Nc3 (27...Nb6 28.a4 Rb3 29.Na5 Rd3 30.Nc6–+) 28.Raf1 (28.hg5 a4 29.a3–+) 28...Rb1 (better 28...Rf8–+) 29.Rf7 Rf1 (29...Na2 30.Re7 Ke7 31.Rb1+–; 29...gh4?! 30.R7f2 Rf1 31.Kf1–+) 30.Rf1 Na2 31.Na5 (31.hg5 Nb4 32.d4 Bg5 33.dc5 Ke7–+) 31...Rf8 (31...gh4 32.d4–+) 32.Ra1 (32.hg5 Nb4 33.Rf8 Kf8–+) 32...Nc3 (better 32...Nb4!? 33.d4 gh4–+) 33.Nc6–/+ White is in command 33...Ne2 34.Kh2 Kf7 (34...gh4? 35.e6 Bd6 36.Kh3 Ng1 37.Kh4 Be7 38.Kg3 (38.Ne7?! Ke7 39.Rg1 Ke6+–) 38...Rg8 39.Kf2 Bh4 40.Kg1+–) 35.Ra7 gh4?? (better 35...Re8=+) 36.Re7+– Kg8 (36...Kg6 37.Kh3+–) 37.Re6 (37.Kh3 Nc3 38.d4 c4+–) 37...Ng3 (better 37...Rf1+–) 38.Ne7?? (better 38.Kh3+–) 38...Kf7–/+ 39.Rh6 Kg7?? (better 39...Ke7 40.Rh7 Rf7 41.Rh4 Nf1 42.Kh1 Ne3–+) 40.Rh4 Nf5?? (better 40...Nf1 41.Kh3 Ne3+–) 41.Nf5 (better 41.Rg4 Kh6 42.Rf4 Ne7 43.Rf8 Kg7+–) 41...Rf5 42.e6 (better 42.Rg4 Kf7 43.Rf4+–) 42...Re5+– 43.Rg4 (43.d4 cd4 44.ed4 Re6+–) 43...Kh8 (43...Kf6 44.d4 cd4 45.ed4 Rh5 46.Kg3 Ke6+–) 44.Re4 (better 44.d4 cd4 45.ed4 Re6 46.Kg3+–) 44...Rh5?? (better 44...Re4 45.de4 Kg7+=) 45.Kg3 (better 45.Kg1 Rg5 46.e7 Rg8+–) 45...Rg5 46.Kf3 (46.Kf4 Rg8 47.e7 Re8+–) 46...Rf5 47.Rf4 (better 47.Ke2!? Rf8 48.d4 cd4 49.ed4 Kg7+–) 47...Re5 48.Re4 (better 48.d4 Re6 49.dc5 Kg7+–) 48...Rf5 49.Kg4 Rf2 (49...Rf8 50.d4 Kg7 51.d5+–) 50.e7 Rg2 51.Kf4 Rf2 (51...Rg8 52.e8Q Re8 53.Re8 Kg7+–) 52.Ke5 c4 (52...Ra2 53.e8Q Kg7 54.Qe7 Kg6 55.Rg4 Kh5 56.Qg5) 53.Rc4 (53.Rg4 Rf5 54.Kf5 h6 55.e8Q Kh7 56.Qg8) 53...Re2 (53...Kg8 54.e8Q Kg7 55.Qe7 Kh6 56.Rh4 Kg6 57.Qh7 Kg5 58.Qh5) 54.Re4 (54.e8Q Kg7 55.Qe7 Kg6 56.Qf6 Kh5 57.Rh4) 54...Kg7 (54...Rb2 55.e8Q Kg7 56.Qe7 Kg6 57.Rg4 Kh5 58.Qg5) 55.e8Q Rh2 (55...h5 56.Kd6 Rg2 57.Re7 Kh6 58.Qf8 Kg5 59.Re5 Kh4 60.Qf4 Kh3 61.Rh5) 56.Rg4 Kh6 57.Qe6 Kh5 58.Qf5 Kh6 59.Qg5 1–0. MARYMARY – thesnarler, ChessWorld.net, 2019.

4.e3 a6 A) 5.a4 Nf6 (5...Bb7 6.Nf3 Nf6 7.Be2 e6 8.0–0 Bb4 9.Bc3 Qe7 10.Bb4 Qb4 11.Nc3 0–0; 5...e6 6.Nf3 Bb7 7.Be2 Nf6 8.0–0 Bb4 9.Nc3 0–0 10.Ne5 d5 11.Nd3 Ba5; 5...ab5 6.ab5 Ra1 7.Ba1 Nf6 8.Bf6 ef6 9.Nf3 d5 10.Bd3 Bc5 11.0–0 0–0) 6.Nf3 Bb7 7.Be2 e6 8.0–0 Bb4 9.Nc3 0–0 10.Ne5 d5 11.Rb1 ab5; B) 5.Qf3 Ra7 (5...d5 6.c4 e6 7.Be2 ab5 8.cb5 Nf6 9.Nh3 Bd6 10.0–0 e5 11.Qg3 0–0; 5...c6 6.Be5 Nf6 7.Bb8 Rb8 8.bc6 e5 9.Nc3 b5 10.cd7 Qd7 11.Rb1 Bb7) 6.e4 Nf6 7.Nc3 e5 8.Bc4 Bc5 9.Nd5 Nd5 10.Bd5 Qe7 11.Qf5 0–0; C) 5.Nc3 Nf6 (5...Bb7 6.Nf3 Nf6 7.Bc4 e6 8.a4 Bb4 9.0–0 0–0 10.Ne5 d5 11.Be2 c5) 6.Nf3 ab5 7.Bb5 c6 8.Bd3 d6 9.0–0 e5 10.e4 Nbd7 11.Be2 Be7; D) 5.ba6 Na6 (5...Nf6 6.Nc3 Ba6 7.Ba6 Na6 8.e4 e6 9.e5 Nd5 10.Nd5 ed5 11.Nf3 Bc5; 5...Nc6 6.Nf3 e6 7.e4 Nf6 8.e5 Nd5 9.c4 Nf4 10.d4 Ba6 11.Qc1 Ng6; 5...e6 6.Nf3 Nf6 7.Ne5 Ba6 8.Ba6 Na6 9.0–0 Bc5 10.d4 Be7 11.c4 0–0; 5...Ba6 6.Ba6 Na6 7.Ne2 e6 8.0–0 Nf6 9.d3 Bc5 10.c4 0–0 11.Ng3 Re8; 5...d5 6.Nf3 e6 7.Nc3 Ba6 8.Ba6 Na6 9.e4 Nf6 10.ed5 ed5 11.0–0 Be7) 6.Nf3 Bb7 7.Be2 Nf6 8.Bf6 ef6 9.0–0 Be7 10.d4 0–0 11.c4 Re8; E) 5.Nf3 Nf6 (5...e6 6.Nc3 Bb7 7.Bc4 Nf6 8.a4 Be7 9.0–0 0–0 10.Be2 c6 11.e4 cb5; 5...Bb7 6.Nc3 Nf6 7.Be2 e6 8.a4 Bb4 9.0–0 0–0 10.Ne5 d5 11.Rb1 Bd6; 5...d5 6.a4 c6 7.Be2 Nf6 8.0–0 e6 9.Bd4 c5 10.Bc3 Bd6 11.Be5 0–0; 5...d6 6.d4 Nf6 7.c4 Bf5 8.Nc3 ab5 9.cb5 d5 10.Be2 e6 11.Nh4 Be4) 6.Be2 ab5 7.Bb5 c6 8.Be2 d6 9.Bf6 ef6 10.0–0 Be6 11.d4 b5.

4.e3 Bb7 5.a4 Nf6 (5...a6 6.Nf3 Nf6 7.Bd3 e6 8.0–0 Bb4 9.Ng5 h6 10.Nf3 0–0 11.Nc3 Qe7; 5...e6 6.Nf3 Nf6 7.Be2 Bb4 8.0–0 0–0 9.Ba3 Ba3 10.Na3 a6 11.d4 Qe7) 6.Nf3 e6 7.Be2 Bb4 8.0–0 0–0 9.Ba3 Ba3 10.Na3 a6 11.d4 Qe7.

4.e3 Bb7 5.Nc3 a6 (5...Nf6 6.Nf3 a6 7.Bc4 e6 8.a4 Bb4 9.0–0 0–0 10.Ne5 d5 11.Be2 c5; 5...e6 6.Nf3 a6 7.Be2 Nf6 8.0–0 ab5 9.Bb5 Ba3 10.Rb1 0–0 11.Ba3 Ra3; 5...Nh6 6.Nf3 a6 7.ba6 Na6 8.Be2 e6 9.a4 Nc5 10.0–0 Be7 11.Re1 0–0) 6.Nf3 Nf6 7.Bc4 e6 8.a4 Bb4 9.0–0 0–0 10.Ne5 d5 11.Bd3 c5.

4.e3 Bb7 5.c4 Nf6 6.Nf3 d5 (6...e6 7.Be2=) 7.a4 (7.cd5 Nd5 8.e4 Nf4+=) 7...dc4 8.Bc4 Bd5 (8...e6 9.0–0+=) 9.Bd5+– Qd5 10.Nc3 Qh5 11.0–0 Nbd7 12.d4 e6 13.Qc2 Be7 14.Ne5 (better 14.Ne4!? Ne4 15.Qe4+–) 14...Ne5= 15.de5 Ng4 16.h3 Nh6?? (better 16...Ne5!? 17.Ne4 c5=) 17.Ne4 (better 17.Nd5! f6 18.Ne7+–) 17...0–0+– 18.Ng3 Qh4 19.Qc7 Bg5 (19...Bc5 20.Ne2+–) 20.Ne2 (20.Bd4 Rfc8 21.Qb7 Be7+–) 20...Bd8 21.Qb7 Bg5 22.f4 (22.Rfd1 Rfb8 23.Qf3 Be7+–) 22...Rfb8 23.Qd7 (better 23.Qf3 Be7 24.Nd4+–) 23...Bd8?? (better 23...Rd8!? 24.Qc6 Be7+–) 24.Nd4 (24.Qe8) 24...Qe7+– 25.Qe7 Be7 26.Nc6 Re8 27.Rfd1 Bc5 28.Bd4 Nf5 (28...Bd4 29.ed4 Nf5 30.a5+–) 29.Bc5 bc5 30.e4 (better 30.Kf2 a6+–) 30...Ne3? (30...Ng3+–) 31.Rd3 (31.Rdc1 Red8 32.Nd8 Rd8+–) 31...Nc4 32.Rc3 Nd2 33.Re1 (33.Rc5?! Nb3 34.Rac1 Kf8+–) 33...c4 34.Rc2 Nb3 35.Rc4 a5 (35...g5+–) 36.Re2 h6 (36...g5 37.Rb2 Nd2 38.Rd2 gf4 39.Rb2+–) 37.Rb2 Na1 38.Rc1 Rac8 39.Ra1 Kh7 (39...Rc7 40.Na5 Rb8 41.Rd2+–) 40.Rd2 (40.Na5 Re7+–) 40...Rc7 41.Rad1 Rh8 42.Rd7 Rcc8 (42...Rhc8 43.Na5 Rd7 44.Rd7+–) 43.Rf7 Kg6 44.Rfd7 Rhf8 (44...Rhe8 45.R1d6 Kh7 46.b6+–) 45.f5! ef5 46.R1d6 (46.Ne7 Kg5 47.Nc8 Rc8 48.Rg7 Kf4+–) 46...Kg5 (46...Kh7 47.Rd8 fe4 48.e6 Rfd8 49.Rd8+–) 47.Rg7 Kf4 48.ef5 Rf5 49.Rg4 Ke3 50.e6 (50.Rg3 Ke2 51.Nd4 Kd2 52.Nf5 Kc2 53.Rc6 Kb1 54.Rc8 h5 55.b6 Kb2 56.b7 Ka2 57.b8Q h4 58.Qb3 Ka1 59.Rc1) 50...Rc5 51.e7 Rc1 52.Kh2 Re8 53.Rd8 Rc6 54.Re8 Rc2 55.Rd8 h5 (55...Rc7 56.e8Q Re7 57.Qe7 Kf2 58.Rf4) 56.Rg3 (56.e8Q Kf2 57.Rf4) 56...Kf2 (56...Kf4 57.Rf8 Ke5 58.e8Q Kd6 59.Rd3 Kc5 60.Qc6 Kb4 61.Rf4 Rc4 62.Rc4) 57.Rf3 (57.e8Q Re2 58.Rd2 Rd2 59.Rf3) 57...Ke1 58.e8Q (58.Kg1 Rg2 59.Kg2 Ke2 60.e8Q) 58...Re2 59.Qd7 Rf2 (59...Rg2 60.Kg2 Ke2 61.Qe6) 60.Qd1 1–0. GuestNNSN – GuestJJJJ, freechess.org, 2017.

4.e3 Bb7 5.Nf3 a6 6.Be2 ab5 7.Bb5 e6 8.0–0 Nf6 9.Ne5 Be7 10.Nc3 0–0 11.Qe2 c6.

4.e3 Bb7 5.Nf3 e6 6.Bc4 a6 7.Nc3 Nf6 8.0–0 ab5 9.Bb5 Ba3 10.Rb1 0–0 11.Ba3 Ra3.

4.e3 Bb7 5.Nf3 Nf6 6.c4 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 c6 10.Nc3 Qc7 11.Be2 cb5 (11...e5 12.d4 ed4 13.Qd4+=) 12.cb5 (12.Nb5 Qc8+–) 12...Qc5 (12...e5!?=) 13.0–0 Nd5 (13...Qd6 14.Qa4 e6 15.Qa7 Bf3 16.Bf3+–) 14.Qb3 (14.Nd5 Bd5 15.Qb1 Qc7+–) 14...Nc3 15.Bc3 e6 16.Bb2 (16.Bd4 Qc7+–) 16...Bd5 17.Qa4 Bf3 18.Bf3 (18.gf3?! Qc7+=) 18...h5?? (better 18...Qb4 19.Qa7 Bd6 20.Bg7 Rg8+–) 19.Rc1 Qg5 (19...Qc1 20.Bc1 d5+–) 20.Rc8 Ke7 21.Rb8 (better 21.Qa3 Qc5 22.Rc5 bc5 23.Qc5 Ke8 24.Qc8 Ke7 25.Ba3 d6 26.Qb8 Kf6+–) 21...f6 (21...f5 22.Ba3 Kf7 23.Qa8 Ba3 24.Rh8+–) 22.Ba3 Kf7 23.Qa7 (23.Qa8 Qb5 24.Rf8 Rf8 25.Qf8 Kg6 26.Qe8 Kh7 27.Be4 f5 28.Qh5 Kg8+–) 23...Kg6 (23...Qb5 24.Rb6 Qd3+–) 24.Bf8 (better 24.Qd7 Qe5 25.Qe8 Kh6+–) 24...Kh6 (24...Rf8 25.Be4 f5 26.Rf8 Qe7+–) 25.Qd7 Rh7 26.Bd6 (26.Qe6 Qg6 27.Be4 Rh8 28.Bg6 Kg6 29.g4 Rh7 30.Bg7 Rg7 31.Qe4 Kh6 32.Rh8 Rh7 33.Rh7 Kg5 34.Rh5) 26...g6 27.Qe6 (27.Bf8 Rg7 28.Qg7) 27...Ra7 28.g3 (28.Rh8 Kg7 29.Qg8) 28...Ra1 (28...Qe3 29.Rh8 Rh7 30.Bf8 Kg5 31.h4) 29.Kg2 Re1 (29...Qg3 30.fg3 Rg1 31.Kg1 Kg7 32.Rb7 Kh6 33.Bf4 g5 34.Qf6) 30.Bf4 (30.Rh8 Kg7 31.Qg8) 30...Qf4 (30...Rg1 31.Kg1 f5 32.Qf6 Qf4 33.Rh8) 31.gf4 (31.Rh8 Kg7 32.Qg8) 31...Rb1 (31...Rg1 32.Kg1 f5 33.Qf6 h4 34.Rh8) 32.Qf6 (32.Rh8 Kg7 33.Qg8) 32...Rb5 (32...Rg1 33.Kg1 h4 34.Rh8) 33.Rh8 1–0. GuestNNSN – GuestJJJJ, freechess.org, 2017.

4.e3 Bb7 5.Nf3 Nf6 6.Be2 a6 7.a4 e6 8.0–0 Bb4 9.Ba3 Ba3 10.Na3 Qe7 11.Nc4 0–0.

4.e3 e6 A) 5.Nf3 a6 (5...Bb7 6.Be2 a6 7.a4 Nf6 8.0–0 Bd6 9.Nc3 0–0 10.ba6 Ba6 11.e4 Bb4; 5...Nf6 6.Be2 a6 7.a4 Bb7 8.0–0 Be7 9.Nc3 0–0 10.Ne5 c6 11.f4 d6) 6.Nc3 Nf6 7.a4 Bb4 8.Be2 Bb7 9.0–0 0–0 10.Ne5 d5 11.Rb1 c6; B) 5.Qf3 d5 (5...c6 6.Nc3 Nf6 7.e4 a6 8.e5 Nd5 9.Nd5 ed5 10.a4 d6 11.Qe3 Be6) 6.Qg3 Nf6 7.Nc3 a6 8.Nf3 ab5 9.Nb5 Na6 10.Be5 Ne4 11.Qf4 Qd7; C) 5.a4 a6 (5...Bb7 6.Nf3 Nf6 7.Be2 Bb4 8.0–0 0–0 9.Ba3 Ba3 10.Na3 a6 11.d4 Qe7; 5...Nf6 6.Nf3 Bb7 7.Be2 Bb4 8.0–0 0–0 9.Ba3 Ba3 10.Na3 a6 11.d4 Qe7) 6.Nf3 Nf6 7.Be2 Bb7 8.0–0 Be7 9.Nc3 0–0 10.a5 ba5 11.Ra5 c6; D) 5.Bd3 a6 6.Nf3 ab5 7.Bb5 Nf6 8.0–0 Bb7 9.a3 Be7 10.Nc3 0–0 11.Qe2 c6; E) 5.Nc3 a6 (5...Nf6 6.Nf3 a6 7.Bc4 d5 8.Be2 ab5 9.Nb5 c6 10.Bf6 gf6 11.Nc3 e5; 5...Bb7 6.Nf3 a6 7.Be2 ab5 8.Nb5 Nf6 9.Bf6 gf6 10.0–0 Rg8 11.c4 Nc6) 6.Nf3 Nf6 7.Be2 ab5 8.Nb5 Be7 9.0–0 0–0 10.c4 Bb7 11.Qc2 d6; F) 5.Be5 Bb7 (5...a6 6.Qf3 Ra7 7.e4 d6 8.Bb2 d5 9.ed5 ed5 10.Qe3 Qe7 11.Nf3 c5) 6.Nf3 a6 7.ba6 Na6 8.Be2 Nf6 9.0–0 Be7 10.c3 0–0 11.d4 d6; G) 5.Qg4 Nf6 (5...Nh6 6.Qf3 d5 7.Nc3 a6 8.a4 Nd7 9.a5 ab5 10.Bb5 Ra5 11.Ra5 ba5) 6.Qf3 d5 7.c4 Be7 8.Qg3 0–0 9.Be5 Bd6 10.Nf3 Be5 11.Ne5 Ne4.

4.e3 Nf6 A) 5.Nf3 a6 (5...d5 6.Be2 a6 7.a4 e6 8.Ne5 Bd6 9.0–0 Bb7 10.ba6 Ba6 11.Bb5 Bb5; 5...Bb7 6.Bc4 a6 7.0–0 ab5 8.Bb5 e6 9.Qe2 Nc6 10.c4 Na7 11.Nc3 Be7) 6.Nc3 d5 7.a4 e6 8.Bd3 c5 9.0–0 Be7 10.ba6 Ba6 11.Bb5 Bb5; B) 5.Be2 a6 (5...Bb7 6.Nf3 a6 7.a4 e6 8.0–0 Bb4 9.Ba3 Qe7 10.Bb4 Qb4 11.Nc3 0–0; 5...d5 6.Nf3 a6 7.Nc3 ab5 8.Nb5 c6 9.Nc3 Qc7 10.Nb1 Nbd7 11.c4 e5; 5...e6 6.Nf3 a6 7.a4 d5 8.Ne5 Bd6 9.0–0 0–0 10.f4 Bb7 11.Nc3 Nbd7; 5...d6 6.Bf3 c6 7.Bf6 gf6 8.c4 Bb7 9.d4 a6 10.bc6 Bc6 11.Nc3 Rg8; 5...c6 6.Nf3 cb5 7.Bb5 e6 8.0–0 a6 9.Ba4 Bb7 10.Nc3 Be7 11.Rb1 0–0) 6.a4 d5 7.Nf3 e6 8.0–0 Bd6 9.Ne5 Bb7 10.ba6 Ba6 11.Bb5 Bb5; C) 5.a4 Bb7 (5...a6 6.Nf3 Bb7 7.Be2 e6 8.0–0 Bb4 9.Bc3 Qe7 10.Bb4 Qb4 11.Nc3 0–0; 5...d5 6.Nf3 a6 7.Be2 e6 8.Ne5 Bd6 9.f4 Bb7 10.0–0 0–0 11.Nc3 Nbd7; 5...e6 6.Nf3 Bb7 7.Be2 Bb4 8.0–0 0–0 9.Ba3 Ba3 10.Na3 a6 11.d4 d6; 5...c6 6.Nf3 d6 7.Bf6 gf6 8.Nc3 a6 9.Bd3 d5 10.0–0 e5 11.bc6 Nc6) 6.Nf3 e6 7.Be2 Bb4 8.0–0 0–0 9.Ba3 Ba3 10.Na3 a6 11.d4 Qe7; A4) 5.Qf3 c6 6.e4 a6 7.e5 Nd5 8.c4 Nc7 9.a4 d5 10.a5 ba5 11.b6 Ne6.

4.e4 a6 A) 5.Nc3 Bb7 (5...e6 6.Qf3 Bb7 7.a4 Bc5 8.Qg3 Nf6 9.e5 Nh5 10.Qg4 g6 11.Ne4 Be7) 6.Nf3 e6 7.a4 Nf6 8.a5 ab5 9.e5 Nd5 10.Nd5 Bd5 11.ab6 Ra1; B) 5.ba6 Na6 6.Bc4 Bb7 7.Nf3 e6 8.d3 Bb4 9.Nbd2 Nf6 10.0–0 0–0 11.Rb1 Be7; C) 5.Nf3 Bb7 (5...Nf6 6.e5 Nd5 7.c4 Nf4 8.d4 Bb7 9.Bc1 Ng6 10.Bd3 ab5 11.cb5 e6) 6.Bc4 e6 7.Nc3 ab5 8.Bb5 Ba3 9.Ba3 Ra3 10.0–0 Nf6 11.Re1 0–0; D) 5.Bc4 e6 6.Nf3 d5 7.ed5 ed5 8.Qe2 Ne7 9.Bd3 ab5 10.Ng5 h5 11.Bb5 c6.

4.e4 Bb7 5.Nc3 (5.Bc4 a6 (5...Be4 6.Bf7 Kf7 7.Qh5 g6 8.Qg4 Nf6 9.Bf6 ef6 10.Qe4 Qe7 11.Nc3 Qe4; 5...e6 6.Nc3 Nf6 7.Qf3 a6 8.a4 Ra7 9.Nge2 d5 10.ed5 ed5 11.Bd3 Be7) 6.d3 e6 7.Nf3 ab5 8.Bb5 c6 9.Bc4 d5 10.ed5 ed5 11.Qe2 Qe7; 5.f3 a6 (5...e6 6.d4 a6 7.Nd2 Nf6 8.Bd3 ab5 9.Bb5 Ba6 10.Ba6 Na6 11.Ne2 d5) 6.d4 e6 7.Nd2 Nf6 8.Bd3 ab5 9.Bb5 Ba6 10.Ba6 Na6 11.Ne2 d5; 5.e5 a6 (5...e6 6.Nf3 a6 7.ba6 Na6 8.Be2 Nh6 9.0–0 Be7 10.Nc3 0–0 11.Re1 f6; 5...Nh6 6.Nf3 a6 7.d4 e6 8.a4 Be7 9.Bd3 0–0 10.Nbd2 f6 11.0–0 Nf5) 6.Nf3 e6 7.Bc4 ab5 8.Bb5 Be7 9.0–0 Nh6 10.Nc3 0–0 11.Re1 f6) 5...Nf6 (5...a6 6.Nf3= Nf6 7.e5 Nd5 8.Nd5 Bd5 9.c4 Bb7 10.Be2 ab5 11.cb5 Bd5; 5...e6 6.Nf3 a6 7.a4 Nf6 8.e5 Nd5 9.ba6 Na6 10.Nd5 Bd5 11.a5 ba5) 6.e5+= Ne4 7.Ne4 (7.Qf3 Nc5 8.Qe3 (8.Qg4 a6 9.d4 Ne6 10.Nf3 ab5 11.d5 Nc5) 8...a6= 9.Nf3 ab5 10.Bb5 e6 11.0–0 Be7) 7...Be4= 8.Qg4 Bb7 (8...Bc2? 9.d3+–) 9.Nf3 d6? (better is 9...e6+= 10.Bc4 a6 11.0–0 ab5; 9...a6 10.a4 Bd5 11.Bc4 Bc4) 10.e6+– f6 11.Ng5! Bd5?? (11...fg5 12.Qh5) 12.Nh7! Rh7 (12...Rh7 13.Qg6) 13.Qg6 1–0. pierre – wih, internet, 2010.

4.e4 e6 A) 5.Nf3 Bb7 (5...a6 6.Nc3 Bb7 7.Bc4 ab5 8.Bb5 Ba3 9.Ba3 Ra3 10.0–0 Nf6 11.Re1 0–0; 5...Nf6 6.e5 Nd5 7.c4 Nf4 8.g3 Ng6 9.h4 a6 10.h5 Ne7 11.h6 g6) 6.Nc3 a6 7.Bc4 ab5 8.Bb5 Ba3 9.Ba3 Ra3 10.0–0 Nf6 11.Re1 0–0; B) 5.Nc3 Bb7 (5...a6 6.Nf3 Bb7 7.Bc4 ab5 8.Bb5 Ba3 9.Ba3 Ra3 10.0–0 Nf6 11.Re1 0–0) 6.Nf3 a6 7.Be2 ab5 8.Bb5 Ba3 9.Ba3 Ra3 10.0–0 Nf6 11.Re1 0–0; C) 5.Qf3 Bb7 (5...a6 6.Nc3 Bb7 7.a4 Nf6 8.Bc4 Ra7 9.Nge2 d5 10.ed5 ed5 11.Bd3 Be7) 6.Nc3 Nf6 7.Bd3 a6 8.Nge2 ab5 9.Bb5 Ra5 10.a4 Nc6 11.0–0 Ne5; D) 5.a4 a5 6.Nf3 Bb7 7.d3 Nf6 8.Be2 Be7 9.0–0 0–0 10.c4 c6 11.Nbd2 d5; E) 5.a3 Bb7 (5...a6 6.Nf3 Bb7 7.Nc3 Nf6 8.e5 Ne4 9.Ne4 Be4 10.d4 Be7 11.Nd2 Bb7) 6.Nc3 a6 7.Nf3 Nf6 8.e5 Ne4 9.Ne4 Be4 10.d4 Be7 11.Nd2 Bb7; F) 5.Bd3 Bb7 (5...a6 6.Nf3 Bb7 7.Nc3 ab5 8.Bb5 Ba3 9.Ba3 Ra3 10.0–0 Nf6 11.Re1 0–0) 6.Nf3 a6 7.c4 Nf6 8.e5 Nh5 9.0–0 Nf4 10.Bc2 d5 11.ed6 Bd6; G) 5.Bd4 Bb7 (5...a6 6.Nc3 Bb7 7.Nf3 Nf6 8.e5 Ne4 9.Ne4 Be4 10.a4 Be7 11.Bc4 0–0; 5...c5 6.Bb2 d5 7.ed5 ed5 8.Nf3 a6 9.ba6 c4 10.Be2 Nf6 11.d3 cd3) 6.Nc3 a6 7.Nf3 Nf6 8.e5 Ne4 9.a4 Nc3 10.Bc3 Be7 11.a5 ab5.

4.Nf3 a6 A) 5.e4 Bb7 (5...Nf6 6.e5 Ne4 7.d3 Nc5 8.d4 Ne4 9.Bd3 d5 10.ed6 Nd6 11.a4 c6) 6.Bc4 e6 7.Nc3 ab5 8.Bb5 Ba3 9.Ba3 Ra3 10.0–0 Nf6 11.Re1 0–0; B) 5.ba6 Nf6 (5...Ba6 6.Nc3 Nf6 7.e4 Bf1 8.Rf1 Nc6 9.e5 Ng4 10.d4 e6 11.h3 Nh6; 5...d5 6.e3 e6 7.Bb5 c6 8.a7 Ra7 9.Be5 Bd7 10.Be2 f6 11.Bg3 e5) 6.a7 Ra7 7.e3 e6 8.Nc3 Be7 9.Bc4 d5 10.Bd3 Ba6 11.Nb5 Bb5; C) 5.Nc3 ab5 (5...Bb7 6.e3 Nf6 7.Be2 e6 8.a4 Bb4 9.0–0 0–0 10.Ne5 d5 11.Rb1 c6) 6.Nb5 Nf6 7.e3 c6 8.Nc3 d5 9.Be2 Qd6 10.a4 e5 11.Ba3 Qe6; D) 5.e3 Bb7 (5...Nf6 6.Nc3 e6 7.Be2 ab5 8.Bb5 Bb7 9.a3 Bd6 10.0–0 0–0 11.Bc4 Ng4; 5...e6 6.a4 Bb7 7.Bd3 Nf6 8.Nc3 Bb4 9.0–0 0–0 10.Ng5 h6 11.Nf3 Qe7; 5...d5 6.a4 Nf6 7.Be2 e6 8.Nc3 Bd6 9.0–0 0–0 10.a5 ba5 11.Ra5 c5; 5...d6 6.d4 Nf6 7.c4 Bf5 8.Be2 ab5 9.cb5 d5 10.0–0 e6 11.Nh4 Be4) 6.Nc3 Nf6 7.Be2 e6 8.a4 Bb4 9.0–0 0–0 10.Ne5 d5 11.Rb1 Bd6.

4.Nf3 Bb7 A) 5.Nc3 Nf6 (5...a6 6.e3 ab5 7.Bb5 e5 8.0–0 Ba3 9.Ba3 Ra3 10.Ne5 Rc3 11.dc3 Qg5; 5...e6 6.e3 a6 7.Be2 ab5 8.Nb5 Nf6 9.Bf6 gf6 10.0–0 Rg8 11.c4 f5) 6.e3 a6 7.Be2 ab5 8.Nb5 Nc6 9.0–0 e6 10.Bf6 gf6 11.d4 Rg8; B) 5.a4 Nf6 (5...e6 6.e3 Nf6 7.Be2 Bb4 8.0–0 0–0 9.Ne5 a6 10.Nc3 d5 11.f4 c5; 5...a6 6.e3 Nf6 7.Be2 e6 8.0–0 Be7 9.Nc3 0–0 10.a5 ba5 11.Ra5 c6; 5...f6 6.e3 e6 7.Be2 a6 8.0–0 Nh6 9.d4 Be7 10.c4 0–0 11.Nc3 Bb4) 6.e3 e6 7.Be2 Bb4 8.0–0 0–0 9.Ba3 Ba3 10.Na3 a6 11.d4 Qe7; C) 5.a3 a6 (5...Nf6 6.e3 a6 7.a4 e6 8.Be2 Bb4 9.0–0 0–0 10.Ne5 Ne4 11.f3 Nf6; 5...e6 6.e3 a6 7.a4 Nf6 8.Be2 Bb4 9.0–0 0–0 10.Ne5 Ne4 11.d3 Nd6) 6.e3 Nf6 7.Nc3 e6 8.a4 Bb4 9.Be2 0–0 10.0–0 c6 11.Re1 d6; D) 5.e3 a6 (5...Nf6 6.Bc4 a6 7.0–0 ab5 8.Bb5 e6 9.Qe2 Nc6 10.Nc3 Ba3 11.Ba3 Ra3) 6.Nc3 Nf6 7.Be2 e6 8.a4 Bb4 9.0–0 0–0 10.Ne5 d5 11.Rb1 c6.

4.Nf3 d5 A) 5.a4 Nf6 (5...a6 6.e3 Nf6 7.Be2 e6 8.0–0 Bd6 9.Be5 0–0 10.Nc3 Ne4 11.Bd3 Nc3; 5...c6 6.e3 a6 7.Be2 Bg4 8.Ne5 Be2 9.Qe2 Nf6 10.0–0 Qd6 11.c4 e6; 5...c5 6.e3 Nf6 7.Be2 e6 8.0–0 Bd6 9.d4 Nbd7 10.c4 0–0 11.cd5 Nd5; 5...e6 6.e3 Nf6 7.Be2 Bd6 8.0–0 0–0 9.Ne5 c5 10.bc6 Ne4 11.Nf3 Nc6; 5...f6 6.d4 a6 7.e3 Bg4 8.Bd3 e6 9.0–0 ab5 10.ab5 Ra1 11.Ba1 Bd6) 6.e3 a6 7.Be2 e6 8.0–0 Bd6 9.Ne5 Bb7 10.f4 0–0 11.Nc3 Nbd7; B) 5.Nc3 Nf6 (5...a6 6.e4 de4 7.Ne4 Nf6 8.Qe2 Nbd7 9.Nf6 Nf6 10.Ne5 Bb7 11.Qe3 e6; 5...e6 6.e4 a6 7.a4 c6 8.Bd3 Ne7 9.0–0 Bb7 10.ed5 cd5 11.Qe2 Qc7) 6.e3 a6 7.Be2 ab5 8.Nb5 c6 9.Nc3 Qd6 10.a4 e5 11.Ba3 Qe6; C) 5.e3 a6 (5...Nf6 6.Bd3 a6 7.a4 e6 8.0–0 Bd6 9.Be5 Be5 10.Ne5 Qd6 11.Ng4 Nfd7) 6.a4 c6 7.Be2 Bg4 8.0–0 Nf6 9.h3 Bf3 10.Bf3 e6 11.c4 dc4.

4.Nf3 f6 5.e4+= e5 (5...Bb7 6.Nc3+=) 6.Bc4 Bd6 (6...c6 7.Ne5 Qe7 8.Nf7 Qe4 9.Qe2 Qe2 10.Ke2+–) 7.Nh4 (better 7.d4 ed4 8.Nd4+– (worse 8.Bd4 Bb7+–; 8.Qd4?! Bb7+–)) 7...c6?? (better 7...g6+–) 8.Qh5+– g6 9.Ng6! (9.Ng6 Qc7 10.Nh8 Kd8 11.Nf7 Ke7 12.Qh7+–) 1–0. Zaichenko,Andrey – Gramajo,Francisco, FICGS, 2008.

4.Nf3 Nf6= A) 5.Nc3 Bb7 (5...a6 6.e4 Bb7 7.e5 Nd5 8.Nd5 Bd5 9.c4 Bb7 10.Be2 ab5 11.cb5 Bd5) 6.a4 e6 7.e3 Bb4 8.Be2 0–0 9.0–0 a6 10.Ne5 d5 11.Rb1 c6; B) 5.e3 a6 (5...d5 6.Be2 a6 7.a4 e6 8.Ne5 Bd6 9.0–0 0–0 10.f4 Bb7 11.Nc3 Nbd7; 5...Bb7 6.Nc3 a6 7.Be2 ab5 8.Nb5 Na6 9.Rb1 e6 10.0–0 Be7 11.Bf6 Bf6) 6.Nc3 Bb7 7.Bc4 e6 8.a4 Bb4 9.0–0 0–0 10.Ne5 d5 11.Be2 c5.

3.Bb2 c6

4.a4 a6 5.e3 (5.Nc3 Nf6+–) 5...Qb6 (5...ab5 6.ab5 Ra1 7.Ba1+=) 6.c4 (6.Nc3 Nf6+–) 6...d5 (6...ab5 7.cb5 d5 8.Nf3+=) 7.cd5+– cb5? (better 7...cd5 8.Nf3 Nf6+–) 8.ab5+– Bd7 (8...Nf6 9.Nc3+–) 9.Nf3 Bb5 (9...Nf6+–) 10.Bd4 Qd6 11.Bb5 Nd7 12.Nc3 0–0–0 (12...Rd8+–) 13.Bd7 Rd7 14.Nb5! ab5 15.Qc2 Rc7 (15...Qc6 16.dc6 Rd4 17.Ra8 Kc7 18.Nd4 e5 19.cb7 Kd6 20.Qc6 Ke7 21.Re8) 16.Ra8 Kd7 17.Qf5 e6 18.Qf7 Be7 (18...Qe7 19.Ne5 Kd6 20.Rd8 Rd7 21.Rd7 Qd7 22.Qd7) 19.Qe8 1–0. GuestRZBS – Edmilson, freechess.org, 2019.

4.a4 cb5 5.ab5 Qb6 6.Nc3 d6 7.Nd5+– Qd8 8.b6! e6?? (8...ab6 9.Ra8 Pinning (9.Ra8 Deflection)) 9.Nc7 Kd7 (9...Ke7 10.Ra7 Nd7 11.Na8+–) 10.Ra7 Ra7 (10...Na6 11.Na8 Nf6 12.Nf3+–) 11.ba7 Qc7 12.a8Q (12.ab8R?! Qb8 13.Qa1 f6+–; 12.ab8Q?! Qb8 13.Qa1 f6+–) 12...Nf6 13.e3 b6 (13...Nc6 14.Bb5+–) 14.Bb5 Kd8 15.Nf3 Ne4 (15...Bb7 16.Qa4 Ne4+–) 16.Qe4 d5 17.Qh4 Be7 18.Ng5 h6 19.Nf7 1–0. Janek – Fiorello, internet, 2018.

4.a4 cb5 5.ab5 Qb6 6.e4 a6 (6...d6!?+–) 7.Nf3+– a5 8.Nc3 e6? (8...Qd8 9.d4+–) 9.d4 (better 9.Na4 and White has reached his goal 9...Qd8 10.Bd4+–) 9...Nf6 10.Bd3 d5 11.e5 Nfd7 12.Ba3 Ba3 13.Ra3 f6 14.0–0 f5? (better 14...fe5 15.de5 Qc5+–) 15.Ng5 h6 (15...0–0 there is nothing else anyway 16.Qh5 h6+–) 16.Qh5 Kd8 17.Ne2 (better 17.Nf7 makes it even easier for White 17...Kc7 18.Nh8 Nc6 19.bc6 bc6+–) 17...Kc7 (17...Rf8 there is nothing better in the position 18.Nf7 Ke7+–) 18.Rc3 Nc6 19.bc6 bc6 (19...Kb8 cannot change what is in store for ? 20.Nf7 Rg8 21.Nd6 bc6 22.Rb3 Qb3 23.cb3+–) 20.Ne6 Kb8 21.Rb3 (21.Rb3 Qb3 22.cb3+–) 1–0. AvImd (1705) – ChezWarrior (1690), lichess.org, 2020.

4.a4 Nf6 5.Nf3+=.

4.c4 cb5 5.cb5 a6 6.a4 ab5 7.ab5 Ra1 8.Ba1 d6 9.e3 b6 10.Nc3 Bb7 11.Nf3 Nd7 12.Be2 Ngf6 13.0–0 g6 14.d4 Bg7 15.Nd2 0–0 16.Bf3 Qc8 17.Bb2 e5 18.Bb7 Qb7 19.Ne2 Nd5 (19...Rc8 20.Qb3=) 20.Nc4+= (20.Nc4 Qc7 21.Qb3 ed4 22.Bd4 Bd4 23.Nd4+=) 1–0. BeepBeepImAJeep (2550) – par40 (2150), lichess.org, 2017.

3.Bb2 d5

4.e3 e5 5.Be5 (--> 1.b4 e5 2.Bb2 Nc6 3.b5 Nb8 4.Be5 d5 5.e3).

4.e3 Bf5 5.Nf3 e6 6.c4 Nf6 (withdraw, 0–1). Brinkmann – Michalakis, corr 3GMM–41 1994–95.

4.Nf3 a6 5.e3 ab5 6.Bb5 c6 7.Be2 Nf6 8.0–0 Nbd7 9.c4 e6 10.Nc3 Nb6 11.cd5 ed5 12.Qc2 Bd6 13.e4 de4 14.Ne4 Be7 15.Nf6 Bf6 16.Qe4 Qe7 17.Qe7 Ke7 18.Rab1 Nd5 19.Bc4 Bb2 20.Rfe1 Kd6 21.Rb2 ½–½. Ganesan – Svensson, corr 3GMM½–04 1997–98.

3.Bb2 d6

4.d4 c6 (4...Bf5 5.e3=) 5.a4 (5.bc6 Nc6 6.d5 Qb6+=) 5...Bd7 (5...Bf5 6.Nf3=) 6.e4 d5 7.ed5 cd5 8.Nf3 Bg4 9.Be2 Qa5 10.Nbd2 e6 11.c3 Nf6 12.0–0 Ne4 The backward pawn on c3 becomes a target (better is 12...Nbd7!?=) 13.Ne4+/– de4 14.Ne5 Be2 (14...Bf5!?+/–) 15.Qe2+– Bd6 16.Qe4 Qc7 17.Rac1 (17.a5 Nd7 18.a6 Rb8 19.ab7 Rb7+–) 17...Nd7+/– 18.f4 f6 (18...Nb6!? 19.Ra1 a5+/–) 19.Nd3+– e5 (19...Nf8 20.c4+–) 20.c4 0–0–0 (20...Be7+–) 21.c5 (worse is 21.fe5 Be7 22.c5 Kb8+–; 21.de5?! Nc5 22.Nc5 Bc5 23.Kh1 g6+–) 21...Be7 22.c6 Kb8 23.cd7 Qd7 24.fe5 fe5 (24...Qe6 25.Rc2+–) 25.Ne5 Qe6 (25...Qd5 26.Qd5 Rd5+–) 26.Nc6! (26.Nc6 bc6 27.Qe6+–) 1–0. Schaar,Joerg (1940) – Teske,Heike (2170), remoteschach.de, 2006.

4.e3 e5 5.c4 Nf6 6.a4 Be7 7.Nc3 Be6 8.Nf3 0–0 9.Be2 Qd7 (9...Nfd7 10.0–0=) 10.0–0 c6 11.d4 ed4 12.Nd4 d5 13.Ne6 fe6 14.cd5 cd5 15.Rc1 a6 16.Qb3 ab5 17.ab5 b6 (17...Qd6 18.e4 Nbd7 19.ed5 ed5 20.Bf3+=) 18.Rfd1 Bc5 19.Bf3 Qe7? (better 19...Qf7+=) 20.Nd5!+– Nd5 (20...ed5 21.Bf6 Annihilates a defender: f6) 21.Bd5?? (better 21.Rd5 Nd7 22.Rg5 Qg5 23.Qe6 Kh8 24.Ba8 (24.Qd7 Rf3 25.Qg7 Qg7 26.Bg7 Kg7 27.gf3 Ra2–/+) 24...Ra8 25.Qd7+–) 21...ed5=+ 22.Qd5 Kh8?? (better 22...Qf7 23.Qa8 Qf2 24.Kh1 Qb2 25.Qd5 Kh8=+) 23.Qa8+– Nd7 (23...Bd6 24.Qa4+–) 24.Qb7 Nf6 (24...Bd6 25.Rc4+–) 25.Qe7 Be7 26.Rc7 Bc5 27.h3 (27.Bf6 gf6 28.Rdd7 Ra8 29.Rh7 Kg8+–) 27...Kg8 (27...h6 28.Ra1 Rd8 29.Rc6+–) 28.Bd4 Rf7 (28...Bd4 29.Rd4 Rb8+–) 29.Rf7 Kf7 30.Bc5 bc5 (30...Ne4 31.Bb6 Nc3 32.Ba5 Nb5 33.Rd5+–) 31.b6 Ne8 32.b7 Nc7 33.b8Q Nd5 (33...Nb5 34.Rd7 Ke6 35.Qe8 Kf6 36.Qf7 Kg5 37.Rd5 Kh4 38.Qf4) 34.Rd5 Kg6 (34...h5 35.Qf4 Kg8 36.Rd7 Kh7 37.Qg3 c4 38.Qg7) 35.Qe5 (35.Qd6 Kf7 36.Rf5 Ke8 37.Rf8) 35...h6 (35...Kf7 36.Rd7 Kg6 37.Rg7 Kh6 38.Qg5) 36.Qf5 1–0. BeepBeepImAJeep (2635) – MELOSO (1880), lichess.org, 2017.

4.Nf3 Bd7 5.a4 (5.e4 a6+=) 5...a6 (5...Nf6 6.Nc3=) 6.c4 (6.e4 Nf6 7.e5 de5 8.Ne5 ab5 9.ab5 Ra1+=) 6...ab5 7.ab5 Ra1 8.Ba1 Bc8 (8...Nf6 9.Bf6 gf6 10.e3+=) 9.e3 Nd7 (9...e5 10.d4 e4 11.Nfd2+=) 10.d4 Ndf6 11.Bd3 e5 (11...d5!?+=) 12.de5+– de5 13.Be5 Nd7 14.Bd4 c5 (14...Nc5 15.0–0+–) 15.Bb2 Nb6 (15...Ngf6 16.0–0+–) 16.0–0 Bg4 17.e4 Bf3 (17...Nf6 18.e5 Nh5 19.Bc1+–) 18.Qf3 (18.gf3?! Qh4+–) 18...Na4 19.Ba1 Bd6?? (19...Nb6+–) 20.Bg7 Bc7 (20...Be5 21.Be5 f6 22.Ba1+–) 21.Bh8 Qd6 (21...h6 22.e5 Qb8 23.e6 Bh2 24.Kh1 fe6 25.Bg6 Kd7 26.g3 Bg3 27.fg3+–) 22.e5 Qe6 (22...Qd7 23.Bf5 Qe7 24.Bh7 Be5 25.Be5 Qe5 26.Bg8+–) 23.Qb7 f6 24.Qc7 fe5 25.Bh7 Ne7 26.Rd1 Nb2 27.Rd8 Kf7 28.Bg8 Kg6 29.Be6 Nc4 (29...Ng8 30.Rg8 Kh6 31.Qg7 Kh5 32.Qg5) 30.Qe7 e4 (30...Nb6 31.Qf6 Kh5 32.g4) 31.Qf6 Kh5 32.g4 1–0. DEFFM – Seeni, freechess.org, 2018.

4.g3 Bd7 (4...a6 5.Nc3 ab5 6.Nb5=) 5.Bg2 (5.Nc3 Nf6+/–) 5...c6 (5...Bb5? 6.Bb7 Na6 7.Ba8 Qa8 8.Nf3+–) 6.Nc3 e5 7.a4 Nf6 8.d3 (8.d4!?+/–) 8...Be7+= 9.Nf3 Qc7 10.0–0 cb5 11.Nb5 Bb5 12.ab5 Nbd7 13.c4 0–0 14.Nd2 a5 15.ba6 Ra6 16.Ra6 ba6 17.Bc3 Nc5 18.Qa1 Rb8 19.Rb1 Rb1 20.Nb1 Bd8 21.h3 Qb6 22.Nd2 Nb3 (22...a5!?+=) 23.Nb3+/– Qb3 24.Ba5 Bb6 25.Bc6 Bd4 26.Qa4 Qa4 27.Ba4 Kf8 28.Bc6 Ke7 29.Bb7 Nd7 30.Ba6 Nc5 31.Bb5 f6 32.Kf1 Ne6 33.e3 Bc5 34.Ke2 g5 35.g4 h6 36.Bc6 Nf8 37.Be4 Nd7 38.Kf3 Bb6 39.Bb6 Nb6 40.Bc6 Ke6? (better is 40...Kd8+–) 41.Ke4 Nc8 42.Bd5 Ke7 43.Kf5 Nb6 44.Bc6 Nc8? (44...Kf7 45.f3 Nc8 46.Bd5 Ke7+–) 45.Kg6 Nb6 46.Kh6 Kf7 47.Bd5 (better is 47.f3 Nc8 48.Bd5 Ke8+–) 47...Ke7 48.Bc6 Nc8?? (48...Kf7 49.f3 Nc8 50.Bd5 Ke7+–) 49.Kg7+– Nb6 50.f3 Nc8 51.Kg6 Nb6 52.Kf5 Kf7 53.f4 ef4 54.ef4 gf4 55.Kf4 1–0. Macedo,A Soares De (1865) – De Araujo,Antonio Jose (1645), 15th IRT da Academia Potiguar de Xadrez, 2015.

3.Bb2 Nh6

4.e3 d6 5.Nf3 Ng4 (5...e5 6.Nc3=) 6.h3 Nh6 7.Be2 Rg8 (7...e5 8.Nc3+=) 8.0–0 Nf5 (8...g5 9.Nh2+=) 9.e4+– Nh6 10.d4 f5 (10...g5 11.Nh2+=) 11.Nbd2 fe4 12.Ne4 g6 (12...Bf5 13.Bd3+–) 13.Nfg5 1–0. DEFFM – GuestKLKZ, freechess.org, 2018.

4.e3 d6 5.f4 Bg4 (5...a6 6.Nc3+=) 6.Be2 Be2 7.Qe2 g6?? (better 7...a6+=) 8.Bh8+– Qd7 (8...f6 9.Nc3+–) 9.Nc3 Qg4 (9...f6 10.Qd3 Qc8 11.h4+–) 10.Nf3 e5 (10...Nd7 11.h3 Qh5 12.Kf2+–) 11.Nd5 Kd8 (11...Qc8 12.Nf6 Kd8 13.fe5+–) 12.Bf6 Be7 (12...Kc8 13.Qc4 c6 14.bc6 Nc6+–) 13.Be7 Kc8 14.Bd6! Nc6 (14...cd6 15.Ne7 Double attack) 1–0. DEFFM – GuestKVPK, freechess.org, 2020.

4.e4 d5+=.

3.e3 a6

4.Bb2 a5 5.c4 c6 6.Nf3 cb5 7.cb5 d6 8.Be2 Bd7 9.a4 Nf6 10.d4 (10.Bf6 gf6 11.Nc3 Rg8+–) 10...Nd5 11.0–0 g6 (11...e6 12.Nc3+–) 12.e4 Nb4 13.d5 Bg7?? (better 13...Rg8+–) 14.Bg7+– Rg8 15.Bh6 (15.Bd4 Bg4+–) 15...Qb6 (15...Bg4 16.Nbd2+–) 16.Be3 Qc7 (16...Qd8 17.Nfd2 Bc8 18.Nc3+–) 17.Nbd2 h5 (17...Nc2 18.Rc1 Ne3 19.Rc7 Nd1 20.Rd1+–) 18.Rc1 Qd8 19.Ng5 (19.Nc4 Bg4 20.Bb6 Qd7+–) 19...f6 (19...Na2 20.Rc4+–) 20.Nh7 (20.Ne6 Be6 21.de6 Na2+–) 20...Rg7 (20...Na2 21.Rc4+–) 21.Bh5! gh5 (21...Kf7 22.Nf6! ef6+–) 22.Qh5 Rf7 23.Qg6 Bb5 (23...e5 24.Nc4 Bc6 25.Ng5 Bd5 26.ed5 Qe7 27.Nd6 Qd6 28.Rc8 Kd7 29.Qf5 Ke7 30.Bc5 fg5 31.Qe6) 24.ab5 (better 24.Qg8 Kd7 25.Qf7+–) 24...Nd3 (24...Nd7 25.Qg8 Rf8 26.Nf8 Nf8+–) 25.Qg8 Kd7 26.Qf7 Nc1 27.Rc1 (27.Qe6 Ke8 28.Nf6 Kf8 29.Qg8) 27...a4 (27...Nc6 28.dc6 bc6 29.Rc6 Qc7 30.Nf6 Kc8 31.Nd5 Qc6 32.bc6 a4 33.Qf8) 28.Qe6 (28.Nf6) 28...Ke8 29.Nf6 Kf8 30.Qg8 1–0. GuestGKFL – GuestXZZT, freechess.org, 2017.

4.Bb2 e6 5.a4 d6 6.Nf3 Nd7 7.Be2 Nc5 (7...e5 8.0–0=) 8.d4 White gets the initiative 8...Ne4 9.Nbd2 d5 10.Ne4 de4 11.Nd2 f5 (11...Nf6 12.c4+=) 12.0–0 Bd7 (12...Nf6 13.ba6 ba6 14.Rb1+=) 13.c4+– ab5 (13...Bb4 14.Bh5 g6 15.Be2+–) 14.ab5 Ra1 15.Qa1 Bb4 (15...Nf6 16.c5+–) 16.Bh5 g6 (16...Kf8!?+–) 17.d5+– Nf6?? (better 17...gh5 18.Bh8 ed5+–) 18.Bf6 Qc8 19.Bh8 Bd2 (19...gh5 20.Qb2 Bf8 21.Bg7 ed5 22.Qe5 Kf7 23.Bf8 Qf8 24.Qd5 Be6 25.Qb7+–) 20.Be2 (20.Qg7 gh5 21.Qh7 Bc3 22.Bc3 Qd8 23.Qh8 Ke7 24.d6 Kd6 25.Rd1 Ke7 26.Bf6 Kf7 27.Qg7 Ke8 28.Qg8) 20...Kf7 (20...Bb4+–) 21.Qg7 (21.Qg7 Ke8 22.Qh7 Bc3 23.Bc3 e5 24.Qg6 Ke7 25.Bb4 c5 26.dc6 Kd8 27.Qf6 Kc7 28.Qe5 Kb6 29.c5 Ka7 30.Ra1) 1–0. DEFFM – xfguest, freechess.org, 2020.

4.c4 ab5 5.cb5 d5 6.Bb2 Nd7 7.Nf3 Ngf6 8.Be2 e6 9.0–0 Bd6 10.a4 e5 11.d3 0–0 12.Qc2 Qe7 13.Nbd2 Rd8 14.a5 Qe6 15.Rfc1 Qg4 16.Ra4 Qf5 17.e4 Qg6 (better is 17...Qh5!?+=) 18.Nh4+/– (18.Nh4 Qg5 19.Ndf3+–) 1–0. byron_de – Klaus Behrmann, ChessWorld.net, 2003.

4.c4 ab5 5.cb5 d6 6.Bb2 e5 7.Nc3 Be6 (7...Nf6 8.Nf3+=) 8.Nf3 Nd7 9.Be2 Ngf6 10.Ng5 Nc5 (10...Bf5 11.f4 Nc5 12.d4 ed4 13.ed4+=) 11.d4 (11.0–0 d5 12.d4 ed4 13.ed4 h6=) 11...h6 12.Ne6 (12.dc5?! hg5 13.cd6 Qd6 14.Qd6 Bd6+=) 12...Ne6 13.0–0 (13.de5 de5 14.a4 Qd1 15.Kd1 Bb4+=) 13...Be7 (13...ed4 14.ed4 d5 15.a4=) 14.Bf3 (14.de5 de5 15.Qc2 0–0+/–) 14...Rb8 (14...ed4 15.Nd5 0–0 16.ed4 Nd5 17.Bd5+=) 15.a4 (better is 15.de5 de5 16.Qd8 Bd8 17.Rfd1+/–) 15...d5?? (better is 15...ed4 16.ed4 d5+=) 16.de5+– Nd7 17.Nd5 (17.Qd5?! c6 18.Qe4 Qc7+–) 17...Bc5 (17...0–0 18.a5+–) 18.Nf4 Ng5 (18...0–0 19.Qc2 Qe7 20.Rad1+–) 19.e6 (better is 19.Bg4 h5 20.Bf5 Rh6 21.Nh5 Ne6+–) 19...fe6 (19...Ne6 20.Ne6 fe6 21.Bg7+–) 20.Bg7 (20.Bh5 Kf8 21.h4 Bd6 22.hg5 Bf4 23.ef4 hg5 24.fg5 Kg8+–) 20...Rh7 (20...Rg8 21.Bh5 Ke7 22.Bh6+–) 21.Bh5 Ke7 22.Ng6 Kf7 23.Bb2 (better is 23.Nf8 Ke7 24.Nh7 Nh7+–) 23...Ke8 (23...Kg8+–) 24.h4 Ne4 (24...Bd6 25.hg5 hg5+–) 25.Qg4 (25.Qg4 Qf6 26.Bf6 Nef6 27.Qe6 Kd8 28.Rfd1+–) 1–0. Frosinos,Ioannis – Kritsiligou,E, 4th Open, Korinthos GRE, 2000.

3.e3 c6

4.a4 d6 5.Bb2 Bd7 6.Nf3 a6 7.c4 (7.Nc3 Nf6+–) 7...Qb6 (7...ab5!? 8.cb5 cb5 9.ab5 Ra1 10.Ba1 Nf6+=) 8.Nc3 Nf6 9.d4 (9.Bd3 Bg4+–) 9...g6 10.a5 Qd8 11.b6 Bg7 12.Bd3 c5 13.dc5 dc5 (13...0–0 14.cd6 ed6 15.0–0+–) 14.Nd5 Nd5? (better 14...0–0 15.Nc7 Nc6 16.Na8 Qa8+–) 15.Bg7+– Rg8 16.cd5 Rg7 17.Rc1 Qc7 1–0. DEFFM – GuestSHVN, freechess.org, 2019.

4.Nf3 c5 (4...d5 5.Bb2=) 5.c4 b6 (5...d5 6.d4+=) 6.Be2 d6 7.0–0. gtate (1820) – bertjosh, net–chess.com, 2002.

3.e3 e6

4.Bb2 a6 5.a4 (5.Nc3 ab5 6.Nb5 Nf6=) 5...a5 (5...ab5!? 6.ab5 Ra1 7.Ba1 Nf6=) 6.c4 b6 (6...Nf6 7.Nf3+–) 7.Nc3 (7.Be2 Nf6+–) 7...Nf6 (7...Bb7 8.Nge2+=) 8.Be2 Qe7 (8...Bb7!? 9.Bf3 Bf3 10.Qf3 c6+–) 9.Nf3 Qb4 (9...Bb7!?+–) 10.Ba3+– (10.Ba3 Qa3 11.Ra3 Ba3 12.Nd4+–) 1–0. Pierre – Grevand, internet, 2020.

4.Bb2 Nf6 5.Bd3 d5 6.c4 (6.Nf3 Nbd7=) 6...Bb4 (6...a6 7.Qa4=) 7.Qa4 (7.Nf3 dc4 8.Bc4 Nbd7=) 7...Bd6 8.cd5 ed5 9.e4 (9.Nf3!?=) 9...Qe7 (9...Nbd7 10.ed5 Nb6 11.Qh4 Nbd5 12.Bc4–/+) 10.Ne2 (10.Bf6 Qf6 (10...gf6?! 11.Nc3=) 11.Nc3 Nd7–/+) 10...de4 (10...Ne4 11.Nbc3 Nc5–/+) 11.Bc4? (better is 11.Bf6!? Qf6 12.Qe4 Kd8 13.Nbc3=+) 11...0–0 (11...Nbd7 12.Bd4–+) 12.0–0 Bd7 (12...Nbd7 13.Bd4–+) 13.Re1 (13.f3 c6 14.fe4 Ne4–+) 13...Re8 14.Nec3 (14.Nbc3 Be6–/+) 14...Be5 (14...Qe5 15.g3 Qh5 16.Be2–+) 15.Ba3 (better is 15.Qb3 c6 16.Ba3–/+) 15...Bd6?? (15...Qd8 16.Bc5–/+) 16.Nd5?? (16.Bb2 Qe5 17.g3–+) 16...Nd5–+ 17.Bd5 Qe5 (17...Bh2 18.Kh2 Qe5 19.Kg1 Qd5–/+ (19...Qa1? 20.Bb7 a6 21.Ba8+–)) 18.Nc3?? (better is 18.Bd6 Qd5 19.Bc7 Bb5 20.Qa5–/+) 18...Qh2–+ 19.Kf1 Qh1 (19...Bg4 20.f3 Bf3 21.gf3 Bg3 22.Ne4 Re4 23.Bf7 Kh8 24.Bc5 Qh1 25.Bg1 Qh3) 20.Ke2 Bg4 21.f3 ef3 (better is 21...Bf3!? 22.Ke3 Qh6 23.Kd4 Qd2 24.Kc4–+) 22.Kd3 Bf5 (better is 22...Re1 23.Qg4 Nc6 24.Bf7 Kh8 25.bc6 f2 26.cb7 Rf8 27.Bd6 cd6–+) 23.Ne4 (23.Be4 Qh5 24.gf3–+) 23...Be4 (better is 23...Qg2!? 24.Kc3 Be4 25.Re4 Re4 26.Qe4–+) 24.Be4 (24.Re4 Rd8 25.Bf7 Kf8 26.Rh1 fg2 27.Rh7 Ba3 28.Kc2 Nc6 29.Rh8 Kf7 30.Qc4 Rd5 31.Qd5 Kf6 32.Qe6 Kg5 33.Rg4) 24...Qg2–+ 25.Bh7 Kh7 26.Re8 Qg6 (26...f2 27.Qh4 Kg6 28.Bd6 f1Q (28...cd6?! 29.Qf4=) 29.Rf1 Qf1 30.Ke3 Qg1 (30...Qb5 31.Re5 Qb6 32.Bc5 Qc5 33.Rc5 f5 34.Qf4 Kh7 35.Qf5 g6 36.Qf7 Kh6 37.Qf8 Kh7 38.Rc7 Nd7 39.Rd7) 31.Kf3 cd6 32.Qe4 Kg5 33.Qf4 Kg6 34.Qe4 Kf6 35.Qe7 Kg6 36.Qe4=) 27.Ke3 (27.Kc3 Qf6 28.d4 Qf5+=) 27...Qg5 28.Kd3 Qd5 29.Qd4?? (29.Ke3 Qg5 30.Kd3 Ba3 31.Qe4 g6 32.Rh1 Kg7 33.Qd4 f6 34.Qc4 Qf5 35.Kc3+–) 29...Qb5–+ 30.Kc2 Qe8 (better is 30...Qc6 31.Bc5 Qc5 32.Qc5 Bc5 33.Rc8–+) 31.Qd3 (31.Bd6 cd6 32.Rg1 Qc6 33.Kd1 f6–+) 31...Kg8 32.Bd6 Qc6 33.Kb3 (33.Kb2 Qd6 34.Qd6 cd6–+) 33...Qd6 34.Qf3 (34.Qd6 cd6 35.Rf1 Nc6–+) 34...Qe6 (better is 34...Nc6 35.Qg2 Qd3 36.Kb2 Qd4 37.Kb1–+) 35.Kc2 (35.Kb2 Qb6 36.Kc1 Nc6–+) 35...Qc6 (35...Nc6!? 36.Kc1–+) 36.Qc3 Qc3 37.dc3 Nc6 38.a4 Rf8 39.Rb1 b6 40.c4 (40.Re1 g5–+) 40...f5 41.Kd2 (41.Rf1 g5–+) 41...f4 42.Rf1 (42.Rh1 f3–+) 42...f3 (42...g5 43.Rg1 Rf5 44.Ke2–+) 43.Ke3 f2 (better is 43...Ne5 44.Kf2–+) 44.Rf2 Rf2 (45.Kf2 Na5–+) 0–1. NN – tulkos, internet, 2002.

4.Nf3 Qf6 5.Nc3 d6 6.Bb2 Qd8 7.Be2 Bd7 8.a4 a5 9.0–0 c6 10.Rb1 cb5 11.Bb5 Bb5 12.Nb5 Qd7 13.d3 Nc6 14.Re1 Nge7 15.Qd2 Nd5 16.e4 Ndb4 17.c3 Na6 18.d4 Na7 (18...d5 19.ed5 Qd5 20.Qe2+/–) 19.Na7 (19.c4 b6+/–) 19...Ra7 20.d5 (20.Qc2 Be7+/–) 20...e5 (20...Nc5 21.Ba3 Na4 22.e5+/–) 21.c4 (21.Ba3 Qa4 22.Qb2 Qd7+/–) 21...Qa4 22.Rec1 (22.Ra1 Qc4 23.Qa5 Ra8+=) 22...Nc5= 23.Ra1 Qd7 (23...Qb3 24.Ba3 Qd3 25.Qb2=) 24.Ra5 (24.Ba3 Qc7+= (24...Ne4? 25.Qe3 Ra8 26.Qe4+–)) 24...Nb3 (better is 24...Ne4 25.Qb4 Ra5 26.Qa5 Be7+=) 25.Qe1?? (better is 25.Ra7 Nd2 26.Ra8 Ke7 27.Nd2+=) 25...Na5 26.Ra1 b6 27.Bc3 (27.Qb4 Be7–+) 27...Qc7 (27...Nc4!? 28.Nd2 Nd2 29.Bd2–+) 28.Nd2 (28.Qb1–+) 28...Nc4 (better is 28...Be7–+) 29.Ra7 Qa7 30.Nc4 Be7 31.g3 (31.Ne3 0–0–+) 31...0–0 32.Qb1? (32.Bb4–+) 32...Rc8 33.Qb4 (33.Qb5 Qa2 34.Nd6 Bd6 35.Qb6 Bc5–+) 33...Qc7 (33...Qc7 34.Nb6 Rb8–+ (worse is 34...Qc3 35.Qc3 Rc3 36.f4–+)) 0–1. Fournier,Frederic (1880) – carlitostictoc (1825), Active ajedrez21.com, 2005.

3.e4 a6

4.Nf3 ab5 5.Bb5 c6 6.Bd3 d5 7.e5 Nd7 8.e6 fe6 9.Ng5 Ne5 10.Bh7 Nf6 11.Qe2 Nh7 12.Qe5 Ng5 13.Qg5 Qd6 14.f4 Rh6 15.Bb2 d4 16.0–0 Qb4 17.Bc1 d3 18.c3 Qe4 19.Rf3 Rf6 20.Bb2 e5 21.Qe5 Qe5 22.fe5 Rf3 23.gf3 Ra4 24.Kf2 g6 25.Na3 Bf5 26.c4 e6 27.Nb1 Bc5 28.Kg2 g5 29.Nc3 Rc4 30.a4 Bd4 31.Re1 Rb4 32.Ba1 Bb6 33.Rb1 Ba5 34.Rb4 Bb4 35.Bb2 Kd7 36.Kf2 Kc7 37.f4 g4 (< 37...gf4 38.Kf3–/+) 38.Kg3. PassedPawn – Klaus Behrmann, ChessWorld.net, 2003.

4.Nf3 ab5 5.Bb5 Nf6 6.e5 Ra5 7.Be2 (< 7.ef6 Rb5 8.0–0 gf6=+) 7...Ne4 8.d3 Nc5 9.d4 Ne4 10.0–0 d5 11.ed6 Nd6 12.c4 Nd7 13.c5 (not finished). marekt – Klaus_Behrmann, ChessWorld.net, 2003.

3.e4 d5

4.ed5 Qd5 5.Nc3 Qd4 6.Nf3 Qb4 7.Rb1 Qd6 8.Be2 b6 9.0–0 Bb7 10.Bb2 Nf6 11.d3 a6 12.a4 e6 13.Nd2 Qf4 14.Bf3 Bf3 15.Nf3 a5 16.Bc1 Qd6 17.Re1 h5 18.Ne4 Ne4 19.Re4 (worse is 19.de4 Qd1 20.Rd1 Nd7+=) 19...Nd7 20.Bf4 Qa3 21.Rb3 (21.Bc7 Rc8 22.Be5 Ne5 23.Ne5 Qc3+–) 21...Qe7 22.d4 0–0–0 23.Rc3 Nc5 24.Re1 (24.Qe1 Ne4 25.Qe4 Rd5 26.Rc7 Qc7 27.Bc7 Kc7 28.Qf4 Kd7 29.Qf7 Be7 30.Qg7 Rc8 31.Ne5 Re5 32.Qe5 Rc2+–) 24...Rd5? (24...Rd7!? 25.Qa1 Nb7+–) 25.Qe2 Qf6 26.dc5?? (better is 26.Be5 Qg6 27.Qc4+–) 26...Qc3–/+ 27.cb6 cb6 28.Be3 Kb7 29.Ng5 Rd7?? (better is 29...Bb4 30.Rc1 Qf6–/+) 30.Qf3+/– Ka7?? (better is 30...Rd5 31.Qf7 Kb8+/–) 31.Bb6!+– Kb6 32.Qc3 Rc7 33.Qd4 Kb7 (33...Bc5 34.Qg7 Rd8 35.c3+–) 34.c4 (34.b6 Bc5 35.Qg7 Bb6 36.Qh8 Rc2+–) 34...Kc8 (34...Bb4 35.Rd1 Rg8 36.h4+–) 35.Rc1 (35.Rd1 Bc5 36.Qg7 Rf8+–) 35...Rd7 (35...Bb4 36.Qg7 Rd8 37.Qf6+–) 36.Qb6 Bd6 37.c5 Bf4 38.c6 (38.Nf7 Rc7 39.Qe6 Kb7 40.Qe4 Kb8 41.Qf4 g5+–) 38...Bc1 (38...Re7 39.Rd1 Bg5 40.Qa5 Ra7 41.Qa7 Bd2 42.Qd7 Kb8 43.Qb7) 39.cd7 (39.cd7 Kd7 40.Qb7 Kd6 41.Nf7 Kc5 42.Nh8+–) 1–0. Salvatore – xorb, ChessWorld.net, 2011.

4.ed5 Qd5 5.Nc3 Qd8 6.Nf3 Nf6 7.Bd3 a6 8.Bb2 ab5 9.Nb5 Bg4 (9...c6 10.Nc3=) 10.Be5+= Na6 11.h3 (11.0–0 e6=) 11...Be6 (11...Bh5 12.0–0=) 12.0–0 Bd5 (12...Nd7 13.Bf4+=) 13.Nfd4 (13.c4 Bc6 14.Qe2 e6=) 13...c5 (13...Nd7!? 14.Bg3 Ndc5=) 14.Re1+= Qb6? (better 14...e6!? 15.Nf5 Qd7+–) 15.Rb1+– Kd8 (15...Qa5 16.Nd6! ed6 17.Bf6 Kd7 18.Qg4 Kc7 19.Bb5+–) 16.c4 (16.Nc7 Qc7 17.Bc7 Nc7+–) 16...cd4 17.cd5 Qa5 18.d6 Qa2? (18...e6 19.Qf3 (19.Nd4?! Qd5+–) 19...Nd7 20.Qf7+–) 19.Qf3 (better 19.Ra1!? Qe6 20.Nc7 Qc8 21.Bf6 gf6+–) 19...Nc5 20.Bd4 1–0. pierred – mgilbert, net–chess.com, 2017.

3.e4 e5

4.Nc3 Nf6 5.Nf3 d6 6.Bc4 Be7 7.d4 Bg4 8.de5 Bf3 9.Qf3 de5 10.0–0 0–0 11.Rd1 Qc8 12.Qg3 Bc5 13.Bg5 Ng4 14.Rf1 h6 15.Bd2 Kh7 16.Be2 Nf6 17.Qe5 Bd6 18.Qd4 Nbd7 19.Bg4?? (better is 19.Rad1+/–) 19...Ng4–+ 20.h3 Bh2 21.Kh1 Be5 22.Qc4 Nb6 23.Qe2 Nf6 24.f4 Bc3 25.Bc3 Qe6 26.e5 g6 27.a4 Nh5 28.f5? (better is 28.Kh2–+) 28...Ng3 29.Kh2 0–1. Gilkarste – Gorgol, ChessWorld.net, 2005.

4.Nf3 f6 5.Bc4+= Ne7 6.0–0 a6 7.Bb2 (7.d4!? ab5 8.Bb5+=) 7...ab5= 8.Bb5 c6 9.Be2 b5 (9...d5 10.ed5 Nd5 11.d4=) 10.Nc3 (10.d4!? d5 11.de5 de4 12.Qd8 Kd8 13.ef6 ef3 14.fe7 Ke7 15.Bf3+/–) 10...d5= 11.ed5 cd5 (better is 11...Nd5!? 12.Ne4 Qe7=) 12.Bb5+/– Bd7 13.Bd7 Qd7 14.h3 h5 15.a4 Qb7 16.Nb5 e4 1–0. pinetree11 – wee harv, ChessWorld.net, 2011.

4.Nf3 Nf6!? =.

2.b5 Nd4

3.a4 a5 4.e3 Nf5 5.Bb2 Nfh6 (5...d5 6.Nf3+=) 6.c4 e5 (6...Nf6!?+=) 7.Be5+– f6 (7...d6 8.Bb2+–) 8.Bd4 Bd6 (8...Nf5 9.Nf3+–) 9.Nf3 Nf5 (9...b6 10.Bd3+–) 10.Be2 (10.Bc3 Be7+–) 10...c5 (better 10...Nd4!? 11.Nd4 Ne7+–) 11.Bb2+– Nge7 12.Nc3 (better 12.e4 Nh6 13.d4+–) 12...g5?? (better 12...0–0+–) 13.Ne4 Be5 14.Ne5 (worse 14.Nf6 Bf6 15.Bf6 0–0 16.Bg5 h6+–) 14...Qc7 (14...fe5 15.Be5 d5+–) 15.Ng4 (better 15.Bh5 Kf8 16.Nf6 Nh4+–) 15...Ng8 (15...Kd8 16.Ng5! fg5 17.Bh8 d6+–) 16.Nef6 Nf6 17.Nf6 Ke7 18.Nd5 Kd8 19.Nc7 (better 19.Bf6 Ke8 20.Nc7 Kf8 21.Bh8 Rb8+–) 19...Kc7 20.Bh8 Nd6 21.Be5 Ra6 22.Bf3 (22.ba6 b6 23.Qb3 h5 24.Qd3 Kd8 25.Qd6 Ke8 26.Bh5 Kd8 27.Bf6) 22...Kb6 23.Bd6 Ka7 (23...g4 24.ba6 Ka7 25.ab7 Bb7 26.Qb3 gf3 27.Rb1 Bc8 28.Bc5 Ka6 29.Qb5) 24.Bc5 (24.ba6 b5 25.cb5 c4 26.b6 Kb6 27.Qb1 Ka6 28.Qb5 Ka7 29.Bc5) 24...b6 25.Bd4 (25.ba6 d6 26.Qb3 Bb7 27.Qb6 Ka8 28.Qb7) 25...d6 (25...Bb7 26.ba6 Kb8 27.a7 Kc8 28.Bb7 Kc7 29.Qf3 d5 30.Qd5 b5 31.Qc6 Kd8 32.Bf6) 26.0–0 (26.ba6 Bf5 27.Qb3 Kb8 28.Qb6 Kc8 29.Qc6 Kb8 30.a7) 26...Be6 (26...Bf5 27.ba6 d5 28.Qb3 Kb8 29.Qb6 Kc8 30.Qc6 Kb8 31.a7) 27.Bd5 (27.ba6 Bd7 28.Qb1 Bb5 29.Qh7 Bd7 30.Qd7 Ka6 31.Qb7) 27...Bc8 28.Bc6 (28.Qb1 h6 29.ba6 Bb7 30.Qb6 Ka8 31.Qb7) 28...Kb8 (28...Bd7 29.ba6 h6 30.Qb3 Kb8 31.Qb6 Kc8 32.Qb7 Kd8 33.Qd7) 29.Qh5 (29.ba6 Bb7 30.ab7 d5 31.Be5 Ka7 32.b8Q Ka6 33.Qb7) 29...Kc7 (29...Ra8 30.Qh6 Ka7 31.Qg7 Kb8 32.Bb6 Bd7 33.Qf8 Bc8 34.Qd6) 30.Qh7 Kb8 (30...Bd7 31.Qd7 Kb8 32.Qb7) 31.Qg8 (31.ba6 Ba6 32.Bb6 Bc4 33.Qc7) 31...Ka7 (31...Kc7 32.Qg7 Kb8 33.ba6 Ba6 34.Bb6 Bc4 35.Qc7) 32.Qc8 (32.Qc8 g4 33.Qc7) 1–0. AleksandrNekhoroshik (1705) – MBKwastaken, lichess.org, 2020.

3.a4 b6 4.Bb2+= e5 (4...Ne6 5.Nc3+=) 5.Nf3 (5.e3 Ne6 6.Be5 a6+/–) 5...Bc5 (5...Nf3 6.ef3 f6 7.a5=) 6.g3 (better is 6.e3!? Ne6 7.Ne5+/–) 6...Qf6 (6...Nf3 7.ef3 d6 8.f4=) 7.Bg2 (better is 7.Nd4 ed4 8.Bg2+=) 7...d5 (7...Bb7 8.0–0=) 8.0–0 (8.Nd4 ed4 9.Bd5 Rb8+/–) 8...Bf5 (8...Ne7 9.Nd4 ed4 10.e4+=) 9.d3 (9.Nd4 ed4 10.Bd5 0–0–0+/–) 9...e4 (9...Nf3 10.ef3 Bd4 11.c3=) 10.de4 de4?? (10...Nf3 11.Bf3 Qb2 12.Qd5 Rd8+/–) 11.Nd4+– 0–0–0 12.e3 (12.Nf5?! Qb2 13.Nd2 g6 14.Be4 Nf6+–) 12...Nh6 (12...Qg6 13.Nd2 Bd4 14.ed4+–) 13.f3 (better is 13.Nd2 Bd4 14.Bd4 Qg6+–) 13...ef3 (13...Be6 14.a5 Nf5 15.Qd2 (15.fe4?! Ne3 16.Qd3 Nf1+=; 15.Ne6?? Be3 16.Rf2 Rd1 17.Bf1 Qb2–+) 15...Rd4 16.Qf2 (16.Bd4 Nd4 17.ab6 Nf3 18.Bf3 Qa1+=; 16.ed4 Nd4 17.Kh1 ef3 18.Bf3 Nf3 19.Bf6 Nd2 20.Nd2 Bd5 21.Nf3 gf6+/–) 16...Ne3 17.Qe3 ef3 18.Bf3=) 14.Bf3 (better is 14.Qf3 Bd4 15.Qb7 Kd7 16.Bc6 Ke7 17.Qc7 Kf8 18.ed4 Rc8+–) 14...Bc2 (14...Rhe8 15.a5 Re3+–) 15.Qc2 (15.Nc2?! Qb2 16.Qc1 Be3 17.Qe3 Qc2+–) 15...Bd4 (15...Qg6 16.Be4 Qg5 17.Nc6+–) 16.ed4 (better is 16.Bd4 Qg6 17.Be4+–) 16...Rd4 (16...Qg6 17.Be4 Qd6 18.a5+–) 17.Bd4 (better is 17.Bb7! Kb7 18.Rf6 gf6 19.Bd4+–) 17...Qd4 18.Qf2 (better is 18.Kh1 c5 19.Rd1+–) 18...Qa1 19.Qc2 Rd8 (19...Qe5 20.Kg2 g6 21.Qc6+–) 20.Nc3 (better is 20.Qc6 Qd4 21.Kh1+–) 20...Qa3 21.Bc6 (21.Nd5 Qc5 22.Qc5 bc5 23.Ne7 Kd7+–) 21...Rd4? (21...Qc5 22.Kh1+–) 22.Re1 (better is 22.Nd5 Qc5 23.Qc5 bc5 24.Re1 Rd5 25.Bd5+–) 22...Nf5 (22...Qc5 23.Kh1 Rd8+–) 23.Qf5 Kd8 (23...Kb8 24.Re8 Rd8 25.Rd8) 24.Re8 1–0. Svenonius,Gerald – Stewart,Eric, IECC, 2006.

3.a4 c6 4.e3 Nf5 5.Bb2 a6 6.c4 (6.e4 Nd6 7.Nc3 ab5 8.ab5 Ra1 9.Qa1 b6+=) 6...Nd6 (6...ab5 7.ab5 Ra1 8.Ba1=) 7.Nf3 cb5 (7...ab5 8.ab5 Ra1 9.Ba1+=) 8.ab5+– a5 (8...Qc7 9.d3+–) 9.Nc3 Nf6 10.Nd5 (10.d3 b6+–) 10...e6 (10...Nd5!? 11.cd5 b6=) 11.Nf6+– gf6 12.Be2 Qc7 (12...Rg8!? 13.0–0 b6+–) 13.Bf6+– Rg8 14.0–0 Nc4? (14...Ne4 15.Bd4+–) 15.Qc2 (better 15.Qc1!? Qc5 16.Qc4 Qc4 17.Bc4 Be7 18.Be7 Ke7+–) 15...d5 (15...Rg2 16.Kh1 Rg6 17.Bd4+–) 16.d3 (16.Qh7?! Rg6 17.Bc4 Rh6+=) 16...Nb6?? (better 16...Rg2 17.Kh1 Bd6 18.dc4 Rg6+–) 17.Qc7 (17.Qc7 Bd7 18.Qb6+–) 1–0. AleksandrNekhoroshik – aabdallah63, lichess.org, 2020.

3.a4 d5 A) 4.Bb2 Nf5 5.Nf3 (5.e3 e6 6.Nf3 Nf6 7.Bd3 Bd6 8.0–0=) 5...e6 6.e3 f6 7.Be2 Ngh6 8.0–0=; B) 4.e3 Nf5 5.Nf3 (5.d4 Nf6 6.Nf3 Ne4 7.Bd3 Nfd6 8.0–0=; 5.Bb2 e6 6.Nf3 f6 7.Be2 Ngh6 8.d4+=; 5.Ba3 Nh4 6.a5 Nf6 7.Bb2 a6 8.ba6=) 5...e6 6.d4 Nf6 7.Bd3 Ne4 8.Ba3+=.

3.a4 d6 4.Bb2 e5 5.e3 Nf5 6.Bc4 Qg5 (6...Nf6 7.Be2+=) 7.Qf3 (better is 7.Nf3!? Qg6 8.d3+/–) 7...Nf6= 8.g3 Ne7 9.h4 (9.Nc3!?+=) 9...Qg6+= 10.Nh3?? (better is 10.Bb3+=) 10...Qc2–+ 11.Bc3 (11.Nc3 Qb2 12.Rb1 Qc2–+) 11...Bg4 12.Qb7 (12.Na3 Bf3 13.Nc2 Bh1 14.d4–+) 12...Qd1 0–1. toffie62 (1825) – donex7 (1800), gameknot.com, 2014.

3.a4 e6 4.Bb2 (4.c3 Nf5 5.e4 Nh4 6.d4 d5 7.e5 Ne7 8.Bg5+=; 4.e3 Nf5 5.e4 Qf6 6.Ra2 Nh4 7.Nc3 Bb4 8.Qh5=) 4...e5 (4...Nf5!?= 5.e4 Nh4 6.Nf3 d5 7.ed5 Nf3 8.Qf3+=; 4...Qf6 5.Nc3 (5.e3 Nf3 6.Nf3 Qb2 7.Nc3 Nf6 8.Rb1=) 5...Qg6 6.Rc1 e5 7.Nd5 Qd6 8.e4+=) 5.e3+/– Nf5 6.Be5 Bb4 (6...d6 7.Bb2+/– d5 8.Nf3+/–) 7.g4 (7.Qg4 Be7 8.Bc7+/–) 7...Nh4?? (better is 7...f6 8.Bc7 Qc7 9.gf5 d5 10.Qh5 Qf7 11.Qf7 Kf7+/–) 8.Bg7+– Qg5 (8...Ng6+–) 9.Bh8 Nh6 10.h3 d5 (10...b6 11.Rh2 Bb7 12.f4+–) 11.Nf3 Qe7 (11...Nf3 12.Qf3 Be6 13.Qf6 Qf6 14.Bf6+–) 12.Nh4 f6 (12...Qh4 13.Qf3 Qd8 14.Bd3+–) 13.Qf3 Qe5 14.Qf6 Qa1 15.Qa1 Be7 16.Qg7 Nf7 17.Qg8 Kd7 18.Qf7 b6 (18...Kd6 19.Be5! Ke5 20.Qe7 Be6 21.f4 Ke4 22.Qe6) 19.Nf5 Bb7 (19...Ba6 20.Qe7 Kc8 21.Qe8 Kb7 22.ba6) 20.Qe7 Kc8 21.Qe8 1–0. marekt – mikeyc, internet, 2008.

3.Nc3 b6 (3...d5 4.e3 Nf5 5.Nf3=) 4.e3+= Nf5 (4...Ne6 5.Qf3 Rb8 6.Bb2+=) 5.d4 (better 5.Qf3!? d5 6.Nd5+–) 5...Bb7 6.Nce2 (6.e4!? Nd6 7.Bd3+=) 6...e6=+ 7.Nf3 Bb4 (7...Nf6 8.Nf4=+) 8.c3= Bd6 9.Nf4 (9.Nd2 Nf6=) 9...Bf4 10.ef4 Qe7 (10...a6 11.ba6 Ba6 12.Ba6 Ra6 13.Qe2=+) 11.Bd3= Nf6 12.0–0 h6 (12...0–0 13.Re1 Qd6 14.Ne5+=) 13.Re1 0–0?? (better 13...Nd6+=) 14.Bf5+– g6 (14...a6 15.ba6 Ba6+–) 15.Nh4 (better 15.Bd3+–) 15...gf5 (15...Nd5 16.Ng6 fg6 17.Bg6 Nc3+–) 16.Nf5! Qd8 (16...ef5 A pinning theme 17.Re7) 17.Nh6 Kg7 18.f5 ef5? (18...Rh8 19.Qd2 Kf8+–) 19.Nf5 Kg6 (19...Kh7 20.Qd2 Ng4 21.Qf4+–) 20.Ne7 (20.Qd3 Ng4 21.Qh3 Qf6 22.Qg4 Kh7+–) 20...Kg7 21.Qd2 Rh8 22.Qg5 Kh7 (22...Kf8 23.Qh6! Rh6 24.Bh6 Ke8 25.Nc6 Ne4 26.Re4 Qe7 27.Re7) 23.Qh6 1–0. MARYMARY – raggiodisole93, ChessWorld.net, 2018.

3.Nc3 e5 4.e3 Nf5 5.Nf3 d6 6.d4 ed4 7.ed4 Be6 8.d5 Qf6 9.Bd2 Bd7 10.Bd3 0–0–0 11.0–0 g6 12.Ne4 Qg7 13.Bc3 f6 14.Re1 h6 15.Rb1 h5 16.Neg5 Nge7 17.Ne6 Be6 18.Re6 Ng8 19.Bf5 gf5 20.Qd3 f4 21.Bd4 Kb8 22.Qa3 b6 23.Qc1 Qg6 24.Rb2 Qf5 25.c4 Bg7 26.Bc3 h4 27.Nd4 Qg4 28.Nc6 Kc8 29.f3 Qg5 30.Nd8 Kd8 31.Bd2 Bh6 32.Re4 f5 33.Bf4 Qg7 34.Bh6 Rh6 35.Re6 Qd4 36.Kf1 f4 37.Re4 Qd3 38.Kg1 Qa3 39.Qf4 Rf6 40.Qg5 Qc5 41.Rf2 Kc8 42.Qg8 Kb7 43.Re8 Rf8 44.Qf8 Qb5 45.cb5 a6 46.Ra8 a5 47.Qc8 1–0. BESTIA – NERO, WinBoard, 2001.

3.c4 c5 4.e3 Nf5 5.Bb2 a5 (5...d5!?=) 6.Nf3+= b6 (6...d5 7.cd5 Qd5 8.Nc3+=) 7.Ne5 (7.Bd3 Nd6+/–) 7...a4 (7...Bb7 8.d3+=) 8.Nf7! Kf7 9.Qh5 Ke6 (better is 9...g6 10.Qf3 Bg7 11.Bg7 Bb7 12.Qb7 Kg7+/–) 10.e4 Nd4 (10...Kd6 11.Be5!! Ke5 12.Qf5 Kd6 13.Qd5 Kc7 14.Qa8 Bb7 15.Qa4 g5+–) 11.Qd5 Kf6 12.Qf5 1–0. Wall,Bill – Frank J, internet, 2003.

3.c4 d5 4.e3 Nf5 5.Nc3 d4 6.Ne4 Nf6 7.Bd3 de3 8.de3 e6 9.Nf3 h6 (9...Bb4 10.Ke2+=) 10.a4 (10.0–0 Ne4 11.Be4 Qd1 12.Rd1 a6+=) 10...g5 (better is 10...Bb4!? 11.Ke2 Ne4 12.Be4 Nd6=) 11.Bb2+/– Bg7 12.Qb3 g4 13.Nfd2 Qd7?? (better is 13...e5+/–) 14.Bf6 0–0 15.Qc3 Rd8 16.Be2 Nd6 (16...Qe7 17.Bg4 Qf8+–) 17.Bg7 Ne8 18.Rd1 Ng7 (18...f5 19.Nf6 Nf6 20.Qf6 Qg7 21.Qd8 Kh7 22.c5+–) 19.Nf6 Kf8 20.Nd7 Rd7 21.0–0 h5 22.Ne4 f5 23.Nf6 (23.Qf6!? Kg8 24.Ng5 f4+–) 23...Rf7 24.Rd8 Ke7 25.Rfd1 (25.Rg8 h4 26.Qe5 c6 27.Rd1 g3 28.Rgd8 gf2 29.Kf2 Rf6 30.Qc7 Bd7 31.R1d7) 25...Rf6 26.Qb4 Kf7 27.Qf8 Kg6 28.Qg8 Rf7 29.Rc8 Rc8 30.Qc8 b6 31.Rd7 Rd7 32.Qd7 e5 33.Qc7 Ne8 34.Qe5 Ng7 35.f3 gf3 36.Qg3 Kh6 37.gf3 f4 38.Qf4 Kh7 (38...Kg6 39.Qf8 Nf5 40.Bd3 Kg5 41.Qf5 Kh4 42.Qf6 Kh3 43.Bf5) 39.Qf7 (39.Qf8 Nf5 40.Bd3 Kg6 41.h4 a6 42.Bf5) 39...Kh8 (39...a6 40.Bd3 Kh6 41.Qf6) 40.Qa7 (40.Qf8 Kh7 41.Bd3 Nf5 42.Bf5) 40...Kh7 41.Qb6 (41.Bd3 Kh6 42.Qe7 Nf5 43.Bf5 h4 44.Qf6 Kh5 45.Qg6) 41...h4 42.a5 Ne8 43.a6 1–0. Willi_weizenkeim – Nat_Clark, playchess.de, 2004.

3.c4 Nf6 4.Bb2 Nf5 5.Nf3 e6 6.e3 Bc5 7.Be2 a6 8.a4 0–0 9.0–0 d5 10.d4 Be7 11.ba6 ba6 12.Nbd2 Ng4 13.h3 (13.Ba3 Nge3 14.fe3 Ne3 15.Be7 Qe7+=) 13...Nge3= 14.fe3 Ne3 15.Qb3 Nf1 16.Rf1 c6 17.Ne5 Qd6 18.Rf3 (18.c5 Qc7 19.Qb6 Qb6 20.cb6 Bd6+/–) 18...f6= 19.Ng4 Rb8 20.Qa2 Qd8 21.Ba3 White plans c5 21...Ba3 22.Ra3 h6 23.c5 (23.Ne3 Qa5=) 23...Rb4 (23...e5 24.Rg3–/+) 24.Nf3+= a5 (24...e5 25.Ne3+=) 25.Rb3 Qc7 26.Rb4 ab4 27.Qb3 Qa5 28.Ne3 Bd7 29.Nd1 (29.Ne1 Ra8 30.Bd1 Rd8=) 29...g5 (29...e5!? 30.Nb2 Re8–/+) 30.Nb2 Kg7 31.Bd3 (31.Qe3 Qc7=) 31...Re8 32.Bc2 e5 33.de5 (33.Qe3 Qc7+=) 33...fe5 (better is 33...Qc5 34.Kf1 fe5–/+) 34.Qd3?? (34.Qe3 Qc7+=) 34...e4 (better is 34...Qc5 35.Kf1 e4 36.Qd4 Qd4 37.Nd4 c5–+) 35.Qd4+= Kh7 (better is 35...Kg8!? 36.Nd2 Qc7 37.Qb4 Bh3–/+) 36.Nc4+= Qc7 37.Nd6 Rf8 (37...Re6 38.Qb4 g4 39.hg4+–) 38.Qb4 Rf4 (38...Bf5 39.a5+/– (39.Nf5?! Rf5 40.Nd4 Rf6+=)) 39.Ne5 (better is 39.Qb6 Qb6 40.cb6+–) 39...Kg7? (better is 39...Be6+/–) 40.Qd4+– (40.Nd7?! Qd7 41.a5 Kg8+/–) 40...Qa5 (40...Kg8 41.Ng6 Kh7 42.Nf4 gf4 43.Be4 Kg8+–) 41.Nec4 (41.Nec4 Kg8 42.Na5+–) 1–0. hertford (2020) – bellboy (1935), ChessWorld.net, 2003.

3.e3 d6?? 4.ed4+– Bd7 5.Nc3 Nh6 6.Bd3 a6 7.ba6 ba6 8.Nf3 f6 9.0–0 g6 10.Re1 a5 11.Bc4 Nf5 12.Nd5 Rb8 (12...Bg7+–) 13.Nf6 1–0. pcmvr (2850) – riaanvdb (1795), net–chess.com, 2011.

3.e3 f5?? 4.ed4+– e6 (4...Nf6 5.Nf3+–) 5.Bb2 (5.Nf3 Nf6+–) 5...Nf6 6.Nf3 d5 (6...a6 7.Be2+–) 7.Ne5 Qd6 (7...Bd6 8.Be2+–) 8.Be2 g6 (8...Qb4 9.Qc1+–) 9.f4 (9.0–0 Nd7+–) 9...Bh6 (9...Nd7 10.a4+–) 10.Ba3 Qd8 11.0–0 1–0. Wall,Bill – Diaz,Fernando, chess.com, 2007.

3.e4 c5 4.c4 (4.c3!? Ne6 5.Bc4+=) 4...Nf6=+ 5.d3 Qa5 6.Nd2 (6.Bd2 Qb6=) 6...a6=+ 7.Bb2 (7.ba6 Ra6 8.Ne2 Ne2 9.Be2 Qc3=+) 7...e5 (7...ab5 8.e5 Ng8 9.Ngf3 Nf3 10.Qf3–/+) 8.Qc1? (8.Ngf3 d6 9.Nd4 cd4=+) 8...Bd6 (better is 8...ab5!? 9.Bd4 ed4–/+) 9.Bc3=+ Qa4 10.Qb2? (10.Bd4 ed4 11.b6=+) 10...Ne6?? (better is 10...Nc2 11.Ke2 Na1 12.Qa1 ab5 13.Be5 Be7–+) 11.Ngf3 0–0 (11...ab5 12.Qb5 (12.Ne5? b4–+) 12...Qb5 13.cb5=) 12.Be2 (better is 12.Ne5 ab5 13.Qb5 Qb5 14.cb5+/–) 12...Nd4?? (better is 12...ab5 13.Qb5 Qb5 14.cb5 Nd4 15.Bd4 cd4=+ (15...ed4? 16.e5+–)) 13.Bd1+– (13.Bd4?! cd4 14.ba6 ba6=; < 13.Nd4 ed4 14.Bd1 dc3 15.Qc3 Qb4 16.Qb4 cb4–/+) 13...Nb5 (13...ab5 14.Ba4 ba4+–) 14.Ba4 Nc3 15.Qc3 Rb8 16.Nh4 (16.Rb1 Re8+–) 16...b5 17.cb5 ab5 18.Rb1 (better is 18.Nf5 b4 19.Qc2 Bc7 20.Ne7 Kh8 21.Qc5 Re8 22.Qc7 Ra8+–) 18...ba4 19.Rb8 Bb8 20.Qc5 d6 21.Qb5 Bd7 22.Qc4 (22.Qa5 Rc8 23.Nf5 Rc1 24.Ke2 Rh1 25.Qd8 Be8 26.Qb8 Rh2 27.Nd6 Kf8 28.Ne8 Ne8 29.Qb4 Kg8+–) 22...Re8 (22...Rc8 23.Qb4+–) 23.Ndf3 (23.Nf5 d5 24.Qc5 Bf5 25.ef5 h5+–) 23...Be6 (23...Rc8 24.Qb4+–) 24.Qa4 Kf8 (24...Rc8 25.0–0+–) 25.Ng5 Bd7 (25...Bg4 26.Qb3 d5 27.f3+–) 26.Nh7! Kg8 27.Nf6 gf6 28.Qd7 Kf8 29.Nf5 Ba7 30.Qa7 Kg8 31.Nd6 Re6 32.Qf7 Kh8 33.Qe6 f5 34.Nf7 Kh7 35.Qf5 Kg7 36.Ne5 Kg8 37.Ng6 Kh7 38.Qh5 Kg8 39.Ne7 Kg7 40.Qf5 Kh8 41.Qg5 Kh7 42.Nf5 Kh8 43.Qg7# 1–0. Taulien,Christian – Tiedemann,Marcel, remoteschach.de, 2002.

3.e4 e5 4.Nf3 Nf3 5.Qf3 Nf6 6.Be2 (6.Bc4 Bc5=) 6...Be7 7.Bb2 d6 8.h3 0–0 (8...Be6 9.0–0=) 9.0–0 Bd7 (9...Be6 10.c4=) 10.a4 (10.d4 ed4 11.Bd4 Be6+=) 10...c6 11.c4 h6 (11...d5 12.ed5 e4 13.Qf4 cd5 14.cd5+=) 12.d4+= ed4 13.Bd4 cb5 (13...Qa5 14.Rd1+=) 14.ab5 a6 15.Nc3 Qc8 (15...Re8 16.ba6 ba6 17.Rfb1+/–) 16.Nd5 Nd5 17.ed5 Bf5 18.Qg3 The mate threat is Qxg7 18...Bg6 19.b6 Qf5 20.Rfe1 Rfe8 (20...Bf6 21.Bg4 Qg5 22.Be3+=) 21.Rad1 (21.Bg4 Qd3 22.Qd3 Bd3+/–) 21...Rad8 (21...Qg5 22.Bg4+=) 22.Bg4 (22.Bd3 Qg5 23.Qg5 Bg5 24.Bg6 fg6 25.Re8 Re8+=) 22...Qc2+= 23.Bh5 Bf8 (23...Rc8 24.Rc1 Qd3 25.Qg4+=) 24.Bg6+/– fg6 25.Bc3 (25.Be3 Qc4 26.Qg6 Rc8+/–) 25...g5 26.Re8 Re8 (26...Re8 27.Ra1 Re4+=). Andre,Karl – Frenzel,Lothar, corr SOK–91–71, 1991.

3.a4 a6

4.Bb2 c5 5.e3+= Nf5 6.Nf3 d5 7.c4 (7.ba6 ba6 8.Nc3 Rb8=) 7...e6 8.d4 Nf6 9.Bd3 cd4 10.Nd4 Nd4 11.Bd4 Bb4 12.Nd2 0–0 (12...dc4 13.Bc4 Ne4 14.Ra2 ab5 15.0–0 Bd2 16.Bb5 Bd7 17.Rd2 Bb5 18.ab5–+) 13.0–0 dc4 (13...ab5 A) worse is 14.ab5 Ra1 15.Ba1 Bd2 16.Bf6 gf6 (16...Qf6?! 17.Qd2 dc4 18.Bc4=) 17.Qd2 dc4–+; B) 14.cb5 Bd6 15.Nf3=) 14.Nc4+= (14.Bc4? e5 15.Be5 Qd2 16.Bf6 gf6–/+) 14...Nd5 15.Qh5 The mate threat is Qxh7 15...f5 16.Ne5 Nf6 (16...Nf4 17.ef4 Qd4 18.Qh4=) 17.Qf3+/– Bd6 18.ba6 (better is 18.Rfd1!?+/–) 18...Be5= 19.Be5 Qd3 20.ab7 Bb7 21.Qb7 Ne4?? (better is 21...Ra5 22.Bf6 gf6+/–) 22.Qg7 1–0. Wolfram,Fritz – Frenzel,Lothar, corr SOK–89–40, 1989.

4.Bb2 Ne6 5.e3 ab5 6.Bb5 b6 (6...c6 7.Be2=) 7.Nf3+= Bb7 8.Nc3 (8.0–0 Nf6+=) 8...Nf6 9.0–0 (9.Ra2 g6=) 9...c6 (9...g6 10.Rb1=) 10.Bd3 (10.Be2 Ra5+=) 10...Nc5 11.Be2 e6 (11...d5 12.Ne5=) 12.d4+= White gets the initiative 12...Na6 13.e4 Be7 (13...d5 14.e5 Nd7 15.Bc1+=) 14.e5 Nd5 (14...Ng8 15.Ne4+=) 15.Nd5+/– cd5 16.Ba3 Nb4 (16...Ba3 17.Ra3 0–0 18.Rb3+=) 17.Qd2 (17.Qb1 Ra4 18.c3 Nc6 19.Be7 Ra1 20.Bd8 Rb1 21.Rb1 Kd8+/–) 17...Ra4 18.Bb5 Ra3 (better is 18...Ra5!? 19.Bd7 Qd7 20.Bb4 Ra1 21.Ra1 0–0+/–) 19.Ra3+– Nc2 (19...Nc6 20.Bc6 dc6 21.Ra7+–) 20.Ra7+/– Qc8? (better is 20...Na3!? 21.Rb7 Nb5+–) 21.Rc1+– Qb8 22.Rb7! Qb7 23.Qc2 0–0 24.Qc7 Qa8 (24...Qc7 25.Rc7 Ra8 26.Kf1+–) 25.Qd7 Qa3 (25...Bb4 26.Rb1 Qa3 27.Qb7+–) 26.Rc7 Bb4 (26...Bd8 27.Rc8 Be7+–) 27.Ng5 Qc1 (27...Qa1 28.Bf1 Qb2 29.Nf7 Qd2 30.Qe6 h5+–) 28.Bf1 (28.Rc1 Bd2 29.Rc8 Bb4 30.Rf8 Bf8 31.Qf7 Kh8 32.Qf8) 28...Qg5+= 29.Qb5 Ba5 (29...Qd2 A) 30.Qb6? Ba5 31.Rc2 Qc2 (31...Bb6?! 32.Rd2 Ra8 33.Bb5+=) 32.Qa5 Qd1–+; B) 30.Qd3+=) 30.Qd3 (30.g3 Qd2 31.Qd3 Qe1+=) 30...h6 (30...Qd8 31.Ra7+=) 31.g3 (31.Be2+=) 31...Bd2 (31...Qd8 32.Rc6+=) 32.h4 (32.Rb7 Bc1=) 32...Qd8+= 33.Qc2 Ba5 (33...Bb4 34.Qc6+=) 34.Bb5= Qb8 (34...Be1 35.Qc6=) 35.Qc6 Be1 (35...Qa8 36.Qa8 Ra8 37.Bc6+=) 36.Kf1 (36.Ba6 Qd8=) 36...Ba5 37.Kg2 (37.Ke2 Qd8+=) 37...Bd2 38.Bd3 Ba5 (better is 38...Qa8!?=) 39.Bg6+/– Qe8?? (39...fg6 40.Qd7) 40.Bf7!!+– Qf7 (40...Rf7 Deflection from e8 41.Qe8 Theme: Double Attack) 41.Rf7 Rf7 42.Qe8 Rf8 43.Qe6 Kh8 44.Qd6 Rc8 (44...Re8 45.Qd5 Be1 46.Qc6+–) 45.e6 b5 46.e7 b4 47.Qa6 Re8 48.Qa5 Re7 49.Qd8 Re8 50.Qe8 Kh7 51.Qb5 (51.Qb5 g5 52.hg5 hg5 53.Qd5+–) 1–0. pierre – opponent, internet, 2008.

4.Bb2 Ne6 5.e3 ab5 6.Bb5 c6N 7.Be2 Nc5 8.Nc3 e5 (8...Nf6 9.Nf3=) 9.Nf3 d6 (9...e4 10.Nd4=) 10.d4+= Nd7 11.0–0 f6 (11...Ngf6 12.de5 de5 13.Bc4=) 12.Nh4 (12.e4 Ne7+=) 12...Nb6 (12...d5 13.Bh5 g6 14.Ng6 hg6 15.Bg6 Ke7 16.Ba3 Nc5 17.Bc5 (17.dc5?! Rh6 18.Bd3 e4+/–) 17...Kd7 18.de5 Bc5 19.Nd5+–) 13.Bd3 (13.e4 Ra5+=) 13...g6 (13...Be6 14.Qe2=) 14.f4 (14.Nf3 Be6+=) 14...f5= 15.g3 e4 16.Be2 d5 17.Ng2 (17.Ba3 Ne7+=) 17...Be6 (17...Bb4 18.Na2 Bd6 19.Nc3+=) 18.Ba3 Bg7 (18...Ne7 19.Qb1=) 19.Bc5 (19.Qb1 Bc8= (worse is 19...Na4 20.Na4 Ra4 21.Qb7+–)) 19...Nd7+= 20.Bd6 Ngf6 (20...Ne7 21.Qd2+=) 21.Qb1 (better is 21.Rb1 b6 22.Qc1=) 21...Qa5 (better is 21...b6!?=) 22.Qb7+/– Qc3? (better is 22...Kf7 23.Ra3 Rhc8+/–) 23.Qa8+– Kf7 24.Qa6 (24.Qb7 Bf8 25.Ra3 Qd2 26.Bf8 Rf8+–) 24...Qc2 (24...c5 25.Be5 Ne5 26.fe5 Nd7+–) 25.Rac1 (25.Rac1 Qa2 26.Rc6+–) 1–0. Wall,Bill – Javier, internet, 2002.

4.Bb2 Ne6 5.e3 ab5 6.Bb5 Nf6 7.Nc3 (7.Nf3 c6 8.Be2 Qb6 9.Bf6 ef6=) 7...c6 8.Bd3 (8.Be2 d5=) 8...d5 (8...Nc5 9.Be2=) 9.Nf3 g6 10.Ne5 Bg7 11.a5 (11.Be2 0–0+=) 11...0–0 (11...Ra5 12.Ra5 Qa5 13.Be2–/+) 12.a6+= Nd7 (12...Qc7 13.ab7 Bb7 14.f4+=) 13.ab7 Bb7 14.Ra8 Ba8 15.Nd7 Qd7 16.0–0 Bb7 (16...Rb8 17.Ba1+=) 17.Qg4= Nc5 18.Qd7 Nd7 19.Rb1 (19.Ba3 c5 20.Bb5 Bc3 21.Bd7=) 19...Nc5 (19...Rb8!?+=) 20.Ba3+= Nd3 21.Be7 (worse is 21.Rb7 Bc3 22.dc3 Ra8 23.cd3 Ra3+=) 21...Ba6? (better is 21...Ra8 22.cd3 Ba6+=) 22.Bf8+– (22.cd3?! Re8 23.Bc5 Bd3=) 22...Bf8 (22...Kf8 23.cd3 Bc3 24.dc3 Bd3+–) 23.cd3 Bd3 24.Rb6 Kg7 25.Rc6 Bc4 (25...h5 26.f3 Bb4 27.Nd5 Bd2 28.e4+–) 26.e4 Bb4 (26...Bd3 27.ed5 Bb4 28.d6+–) 27.Nd5 (27.ed5 Bd3+–) 27...Bd5 28.ed5 1–0. marr – madafis, internet, 2010.

4.e3 Ne6 5.Bb2 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 Nf6 9.Nf3 g6 10.Be2 Bg7 11.0–0 0–0 12.h3 (12.Nc3 d6+=) 12...d5 13.cd5 Qd5 14.Nc3 Qd6 15.d4 Nd5 (15...Rd8 16.Bc4+=) 16.Ne4+= Qd7 17.bc6 bc6 18.Qc2 f5 19.Nc5 Nc5 20.Qc5 f4 (20...Qd6!?+=) 21.e4+– Nf6 22.Bc4 Kh8 23.Ne5 Qe8 24.f3 e6 (24...Nd7!? 25.Qc6 Ne5 26.Qe8 Re8 27.de5 Rd8+–) 25.Nc6+– Nh5 (25...Nd7 26.Qd6 Nb6 27.Bb3+–) 26.Bc3 Rf7 27.Na5 (better 27.Ne5 Rb7 28.Ra1+–) 27...Rc7?? (27...Qd8 28.Rb1 Rc7 29.Nc6+–) 28.Qb4 (better 28.Qc7 Qd7 29.Qd7 Bd7 30.Rb1+–) 28...Bf8 (28...Qd8 29.Rd1+–) 29.Qb3 (29.d5 Bg7+–) 29...Ng3 30.Rb1 Qe7 (30...Bg7 31.Kh2+–) 31.d5 Bg7 32.Bg7 (32.Bb4 Bd4 33.Kh2 Qf6 34.de6 g5+–) 32...Kg7 33.Qb2 Kh6 34.Qd4 ed5 35.Qd5 Be6 (35...Be6 36.Qe6 Qc5 37.Kh2 Qa5+–). KLINGON09 (1750) – spiker90 (1765), lichess.org, 2020.

4.e3 Nf5 =.

3.a4 c5

4.c3 Ne6=+ 5.a5 (5.Nf3 Nf6=+) 5...Nf6 6.e3 (6.c4–/+) 6...Nd5 (better 6...d5!?–/+) 7.Bc4 (7.Qb3 Nf6=) 7...Nec7 (7...Ndc7 8.e4=+) 8.Bb2 e6 9.Bd5 (9.Nf3 Be7+=) 9...Nd5 10.e4 (10.Nf3 Be7=) 10...Nf4=+ 11.b6?? (11.Qf3 Ng6 12.c4 Be7=+) 11...a6 (better 11...Nd3 12.Ke2 c4–+) 12.Kf1? (12.Qf3 Ng6 13.c4 Be7=+) 12...e5 (better 12...Nd3!? 13.Qe2 c4–+) 13.g3 Nd3 14.Qc2?? (better 14.c4–/+) 14...c4–+ 15.Nf3 (15.Ba3 d5 16.Bf8 Kf8–+) 15...d6 (15...d5 16.Ne5 Bh3 17.Ke2 Ne5 18.Ba3–+) 16.h4 (16.Ne1 Qf6 17.f3 d5 18.ed5 Bg4 19.Qa4 Kd8 20.Qc4 Bf3 21.Qd3 Be4 22.Ke2 Bd3 (22...Bh1?! 23.c4–+) 23.Nd3 e4–+) 16...f6 (better 16...Qf6 17.Kg2 d5–+) 17.h5 (17.Ne1 Nb2 18.Qb2–+) 17...h6 (17...f5!? 18.h6–+) 18.Nh4 (better 18.Ne1 Nb2 19.Qb2–/+) 18...Bg4?? (18...Qd7 19.Rh2–+) 19.f3?? (19.Ng6 Bf3 20.Rh4=+) 19...Be6 (better 19...Bh5!? 20.Qa4 Qd7 21.Qd7 Kd7 22.Ra2–+) 20.Ng6–/+ Rh7 (better 20...Rg8–/+) 21.f4? (21.Ba3 Kf7 22.Rh4 Rc8–/+) 21...ef4?? (21...Qc8 22.Ba3 Bh3 23.Kg1 Qg4–+) 22.Nf4=+ Nf4 23.gf4 Bg4 (23...Rc8 24.Kg2=+) 24.Rg1 (better 24.e5!? f5 25.e6=) 24...Qd7=+ 25.f5 (25.d4!?=+) 25...Bh5–/+ 26.Qa4 (26.d4 cd3! 27.Qd3 Bf7–/+) 26...g5 (26...Bf7 27.Rg4–+) 27.Qd7 (better 27.fg6!? Rg7 28.Kf2–+) 27...Rd7 28.Ra4 (28.Na3 d5 29.ed5 Rc8–+) 28...Rc8 (28...d5 29.Kg2 de4 30.Rc4 Bf3 31.Kf2–+) 29.Na3 (29.Kf2–+) 29...Re7?? (29...d5 30.ed5 Ba3 31.Ra3 Rd5 32.Rh1–+) 30.Rc4? (better 30.Nc4 Be2 31.Ke2 Re4 32.Kd3–/+) 30...Rc4–+ 31.Nc4 Re4 32.d3? (32.Ne3–+) 32...Be2 33.Kf2 Bd3 34.Na3 (34.Ne3 Rf4 35.Ke1 Kf7–+) 34...Rf4 (better 34...Re2 35.Kf3 Rb2 36.Ke3 Bf5 37.Nc4–+) 35.Kg3 (35.Ke3 Bf5 36.Nb5 ab5–+) 35...h5 36.Bc1 (36.Re1 Kf7 37.Bc1–+) 36...h4 37.Kg2 Rg4 38.Kh2 Rg1 39.Kg1 d5 40.Kf2 Bc5 41.Kf3 Bf5 (41...h3 42.Nb5 Bb5 43.c4 g4 44.Kg3 Bd6 45.Kg4 h2 46.Bf4 Bf4 47.cb5 Bd6 48.Kf3 h1Q 49.Kf2 Qh4 50.Ke2 Qe4 51.Kf2 Bc5 52.Kg3 Qe3 53.Kg2 Qf2 54.Kh3 Bd6 55.Kg4 Qg3 56.Kh5 Qg5) 42.c4 Ba3 (better 42...h3 43.Nb1 g4 44.Kg3 Bd6 45.Kf2 h2 46.Na3 h1Q 47.Bf4 Qf3 48.Ke1 Bb4 49.Bd2 Bd3 50.Bb4 Qe2) 43.Bd2 (43.Ba3 dc4 44.Bb4–+) 43...dc4 44.Ke3 (44.Be3 c3 45.Bf2 c2 46.Be3 h3 47.Bd2 h2 48.Kg2 Bd6 49.Kf2 h1Q 50.Bg5 Bc5 51.Be3 c1Q 52.Bc5 Qce1) 44...h3 45.Kf2 (45.Kf3 h2 46.Kf2 h1Q 47.Bc3 Bc5 48.Bd4 Bd4 49.Ke2 Bc2 50.Kd2 Qd1) 45...g4 (45...h2 46.Be3 h1Q 47.Bd4 Qh2 48.Ke1 Bb4 49.Bc3 Bc3 50.Kd1 Qd2) 46.Bf4 Bb4 47.Kg3 (47.Ke2 c3 48.Kf2 Ba5 49.Be3 h2 50.Kg2 g3 51.Bc5 Be4 52.Kg3 h1Q 53.Bd6 Qf3 54.Kh4 Bf5 55.Bf4 Qg4) 47...Ba5 48.Be3 (48.Bd6 Bb6 49.Kf4 h2 50.Kf5 h1Q 51.Kf6 g3 52.Ke6 Qe4 53.Kf6 Bd8 54.Kg7 Qg4 55.Kh7 Kf7 56.Bf8 Bf6 57.Bc5 Qh5) 48...c3 49.Kf4 (49.Kf2 h2 50.Kg2 g3 51.Bd4 Be4 52.Kh3 h1Q 53.Kg3 Qf3 54.Kh4 Bf5 55.Bc3 Qg4) 49...Bd7 50.Bd4 Kf7 51.Be3 (51.Ke3 c2 52.Ke4 c1Q 53.Bg1 Bc6 54.Kd3 Qd1 55.Ke3 Qd2) 51...h2 52.Bd4 (52.Bc1 h1Q 53.Ke3 Qc1 54.Kd4 Qf4 55.Kd3 Qd2 56.Ke4 Bc6 57.Kf5 Qg5) 52...h1Q 53.Bc3 (53.Bf6 Kf6 54.Ke3 Qf3 55.Kd4 Be6 56.Kc5 Qd5) 53…Qf3 0–1. venaverme – bleeddry, gameknot.com, 2018.

4.e3 Nf5 5.Bb2 e6 6.Nf3 b6 7.Bd3 Nd6 8.c4 Be7?? (better is 8...Bb7+=) 9.Bg7+– Bf6 10.Bh8 Bh8 11.Ra2 Bb7 (11...Nf6 12.Nc3+–) 12.Nc3 (12.Bh7 Nf6 13.Bd3 Ng4+–) 12...Bc3 13.dc3 Qf6 14.Ra3 (14.Bh7 Ke7 15.Rc2 Qg7+–) 14...h6 15.Bc2?? (better is 15.a5+–) 15...Nc4+= 16.Rb3 0–0–0 (16...Na5 17.Rb1+=) 17.e4 (17.Qe2 d5 18.0–0 Ne7+/–) 17...d5 (17...Na5!? 18.Rb1 Qc3 19.Qd2 Qd2 20.Nd2 d5+=) 18.Qe2+/– de4 19.Ng1?? (better is 19.Be4 Bd5 20.Bd5 ed5 21.0–0+/–) 19...Nd2 (better is 19...Rd2 20.Bd1 Re2 21.Ne2–+) 20.Ra3 e3?? (20...Qg5 21.g3 Nb1 22.Rb3 Qc1 23.Bd1–+) 21.f3? (21.fe3 Qg5 22.h4–/+) 21...Qh4–+ 22.g3 Qg5?? (better is 22...Qf6 23.Be4 Ne4 24.Qe3 Ng5–+) 23.a5 (better is 23.c4+=) 23...Nf3?? (better is 23...Qf6 24.ab6 ab6 25.Qe3 Nc4–+) 24.Nf3+– Qh5 (24...Bf3 25.Qf3 Qd5 26.0–0 Qf3 27.Rf3+–) 25.Rf1 Rd2 (25...Nf6 26.ab6 ab6 27.Qe3 Nd5+–) 26.Nd2 Qe2 (26...ed2 27.Qd2 Nf6+–) 27.Ke2 Nf6 (27...ed2 28.ab6 ab6 29.Rf7+–) 28.Rf6 ed2 29.Kd2 1–0. pittol – donkings, gameknot.com, 2015.

3.a4 e5

4.Bb2 Bc5 5.d3 c6 (5...Qf6 6.e3 Ne6 7.Nf3=) 6.c4 (better 6.e3!? Qa5 7.Nd2+=) 6...Bb4=+ 7.Nd2 Qa5 (7...d5 8.cd5 Qd5 9.Ngf3=+) 8.Ngf3= Nf3 9.ef3 Nf6 (9...d6 10.f4=) 10.Be5+= d6 11.Bf6 gf6 12.Qe2?? (12.Qc2!?+=) 12...Kd7 (better 12...Kd8 13.Qd1 a6–/+) 13.g3?? (better 13.Kd1 Bc3 14.Ra2=+) 13...Re8–+ 14.Bh3 Kc7 (14...Kd8 15.Bc8 Rc8–+) 15.Qe8+– Bd2 16.Kf1 (better 16.Ke2 Bh3 17.Qa8+–) 16…Bh3 (16...Bh3 17.Kg1 Re8 18.b6 ab6 19.Rf1 Qf5 20.f4 Qd3 21.Rd1 Qe4 22.Rd2 Qe1) 0–1. JUANKARODA (1725) – witenight (1735), lichess.org, 2020.

4.Bb2 d6 5.Bd4 ed4 6.Nf3 Qf6 7.c3 dc3 8.Nc3 =.

4.Bb2 d6 5.e3 Ne6 6.Bc4 (6.Ne2 Nf6=) 6...f5 (6...Nf6 7.Nf3=+) 7.d4 (7.Nf3 d5 8.Ne5 dc4 9.Qh5 g6 10.Ng6 Nf6 11.Bf6 Qf6 12.Nh8 Kd8 13.Nf7 Ke7+–) 7...d5 8.Bb3 e4 (8...ed4 9.ed4 Nf4 10.Qf3 Qe7 11.Kf1=) 9.c4 (9.Ne2 Bb4 10.c3 Ba5=) 9...Nf6 (9...Qg5 10.g3 (10.cd5? Qg2 11.de6 Bb4 12.Ke2 Qh1–+) 10...dc4 11.Bc4=) 10.Ne2 c6 (10...a6 11.ba6 ba6 12.cd5 Nd5 13.0–0=) 11.0–0 Bd6 12.Nec3 (better is 12.Nd2=) 12...Bh2!–/+ 13.Kh2 Ng4 14.Qg4 fg4 15.cd5 Ng5 (better is 15...cd5 16.Nd5 0–0–+) 16.dc6?? (16.Ba3–+) 16...Nf3! 17.gf3 gf3 18.Rh1 Qh4 (18...Qg5 19.Bf7 Kf7 20.Ne4 Qg2) 19.Kg1–+ Qg4 20.Kf1 Qg2 (21.Ke1 Qh1 22.Kd2 Qh4–+) 0–1. Boutchenik,Victor – Betton,Olivier, Paris op–C, 1998.

4.Bb2 d6 5.e3 Ne6 6.Nf3 Ne7 7.d4 ed4 8.Nd4 =.

4.Bb2 f6 5.e4 (5.f4 Qe7 6.e3 Nf5 7.Nc3 ef4 8.Nd5=; 5.e3 Ne6 6.Be2 d5 7.Nf3 e4 8.Nd4=) 5...Ne7 6.Bd4 ed4 7.Bc4 f5 8.Qf3 =.

4.c3 Ne6 5.d4 ed4 6.cd4 d5 7.e3 Bd6 8.Nf3 =.

4.c3 Ne6 5.e4 d5 6.Nf3 Nf6 7.Ne5 Ne4 8.d3 =.

4.c3 Ne6 5.Nf3 e4=+ 6.Ne5 d5 7.e3 g6 8.f3 Nh6 9.fe4 de4 10.Bc4? (better is 10.d4!?–/+) 10...Qg5–+ 11.Be6 (better is 11.d4 Qg2 12.Rf1 Qh2 13.Qd2 Qg3 14.Qf2 Qf2 15.Rf2–+) 11...Be6 (11...fe6?! 12.d4 ed3 13.Nd3 Qg2 14.Nf2–+; 11...Qe5?! 12.Bc8 Rc8 13.Bb2=+) 12.d4 Qg2 13.Rf1 Be7 14.Rf2 (14.Qe2 Qe2 15.Ke2–+) 14...Bh4 15.Qe2 Ng4 16.Ng4 Bg4 17.Qa2 (17.Qf1 Qf3 18.Kd2 Bf2 19.Kc2–+) 17…Qg1 (18.Kd2 Qf2#) 0–1. Kunk – marekt, ChessWorld.net, 2003.

4.e3 Ne6 5.a5 (5.Bb2 e4 6.d3 Nf6 7.de4 Ne4 8.Nf3=; 5.d4 e4 6.d5 Nc5 7.Bb2 Nf6 8.Bc4=) 5...d5 6.Bb2 Bd6 7.Nf3 Qf6 8.c4 =.

4.e3 Nf5

5.Bb2 d6!? =.

5.Bb2 Qe7 6.Nf3 e4 7.Nd4 d5 8.Nf5 =.

5.Bb2 Nf6 6.Be5+= Nd5 7.e4 d6 (7...Qe7 8.ed5 Qe5 9.Qe2 Qe2 10.Be2+=) 8.Bb2+/– (8.ed5?! de5 9.Nc3 Nd4=) 8...Nde3?? (better is 8...Qe7 9.d3 Nf6+/–) 9.de3+– (9.fe3?! Qh4 10.g3 Ng3+–) 9...Ne7 10.Bc4 Be6 11.Nd2 Ng6 12.Bd5 Bd5 13.ed5 Be7 (13...Qg5 14.Qf3+–) 14.Bg7 Rg8 15.Bh6 (15.Bd4 Bf6 16.Ngf3 Bd4 17.Nd4 Ne7+–) 15...Qd7 (15...Bg5 16.Bg5 Qg5 17.Ne4 Qg2 18.Qf3+–) 16.Ngf3 Bf6 17.Ne4 Ba1 (17...Bh8 18.Rb1 Qg4 19.Ng3 Bc3 20.Nd2+–) 18.Qa1 Qf5 (18...0–0–0 19.Nf6 Qf5 20.e4+–) 19.Nf6 Ke7 20.Ng8 (better is 20.Qc3!? Ne5 21.Qc7 Nd7 22.Ng8 Rg8+–) 20...Rg8 21.Qc3 Kd7 22.0–0 (22.Qd3!? Ne7 23.Qf5 Nf5+–) 22...Ne5 23.Nh4 (23.Ne5!? de5 24.f4 Qg6+–) 23...Qh5?? (better is 23...Nf3! 24.Kh1 Nh4+=) 24.g3 (better is 24.f4 Ng6 25.Ng6 Qg6 26.Bg5+–) 24...Qh6 25.Kh1 Qe6?? (25...Qh5 26.Qd2+–) 26.Qd4 (better is 26.de6 fe6 27.f4+–) 26...Qg4 (26...Qh3 27.Rg1 Rg4+/–) 27.Qg4 (27.Qa7?! Qc4 28.Re1 Qd5 29.Kg1 Qe4+/–) 27...Ng4 28.a5 Nh6 29.c4 Re8 30.Rb1 Ng8 (30...Re4 31.Rc1+–) 31.b6 (31.Nf5 Re5 32.Nd4 Ne7+–) 31...ab6 32.ab6 Nf6 33.Nf5 Ng4 34.Kg2 (34.Kg2 Ra8 35.bc7 Kc7 36.Rb2+–) 1–0. tomnrw – escaped, mySchach.de, 2003.

5.e4 Nd4 6.c3 Ne6 7.Nf3 Nf6 8.Ne5 =.

5.g4 Nd6 6.Nc3 Nf6 7.Bg2 e4 (7...h6 8.d3=) 8.g5 b6? (better is 8...Ng8=) 9.gf6+– Qf6 10.Ne4 (10.Nge2 Bb7+–) 10...Qa1 11.Nd6 Bd6 12.Ba8 Qa4 13.Be4?? (better is 13.Bb2+–) 13...Qe4–+ 14.Nf3?! (14.Qf3 Qc2 15.Ne2–+) 14...Bb7 15.Rg1 Qf5 (better is 15...Qf3 16.Qf3 Bf3 17.Rg7 Be5–+) 16.Nd4–/+ Qf6 17.f3? (better is 17.Qg4!?–/+) 17...Qh4 18.Kf1 Bh2 19.Rg2 (19.Rg7 Be5 20.Rg2 Qh5–+) 19...Be5 20.Bb2 Qh1 21.Rg1 Qh3 22.Kf2 0–0 (22...a6 23.Qf1 Qf1 24.Rf1–+) 23.Qf1 Qh4 (23...Qf1!? 24.Rf1 c5 25.bc6 dc6 26.Rb1–+) 24.Ke2 a6 (24...Qh2 25.Ke1–+) 25.Qg2? (better is 25.Kd1!? Ra8 26.Nf5–/+) 25...ab5–+ 26.Ba3? (26.Rh1 Qd8–+) 26...Re8 (better is 26...Ra8!? 27.Bb2 c5 28.Rh1–+) 27.Nf5 Qc4 28.Kd1 Qa4?? (better is 28...g6 29.d4 Bd4 30.Nd4 Re3–+) 29.Ng7 (better is 29.Nh6 Kh8 30.Nf7 Kg8 31.Ne5+–) 29...Ra8?? (better is 29...Qa3 30.Ne8 Kf8+=) 30.Nf5 (30.Ne8 Bg3 31.Qg3 Qg4 32.Qg4 Kh8 33.Qg7) 30...Kh8 (30...Qg4 31.Nh6 Kh8 32.Nf7 Kg7 33.Qg4 Kf6 34.Qg5 Ke6 35.Qe5 Kf7 36.Rg7) 31.Nh6 Bf3 (31...Qg4 32.Nf7 Kg7 33.Qg4 Kf6 34.Qg5 Ke6 35.Qe5 Kf7 36.Rg7) 32.Qf3 Bg7 (32...Rf8 33.Qf7 Qc2 34.Kc2 Ra8 35.Rg8 Rg8 36.Qg8) 33.Qf7 (33.Qf6 Qc2 34.Kc2 Bf6 35.Nf7) 33...Bh6 (33...Qc2 34.Kc2 Bh6 35.Bb2 Bg7 36.Qg7) 34.Bb2 (34.Qf6 Bg7 35.Qg7) 34...Bg7 (34...Qd4 35.Bd4 Bg7 36.Qg7) 35.Bg7# 1–0. bhunterd – achillesofteoy, gameknot.com, 2013.

3.a4 Nf6

4.e3 Ne6 5.Bb2 g6 (5...d5 6.Nf3=) 6.Nf3 a6 (6...Bg7 7.Be2=) 7.g4 (7.ba6 ba6 8.Bf6 ef6=) 7...h6= 8.h4 (8.e4 Bg7 9.e5 Nd5=+ (worse 9...Ng4 10.h3+=)) 8...Bg7=+ 9.Bg2 (9.Rg1!?=+) 9...Ng4–/+ 10.Bg7 Ng7 11.ba6 Ra6 (worse 11...ba6 12.Nh2 Nf2 13.Kf2+–) 12.Nd4 (12.Rg1 d5–/+) 12...d5 13.Nc3 (13.Bf1 Rf6 14.f4 e5 15.Bb5 c6 16.fe5 Qc7–+) 13...c6 (13...e5 14.Nb3 Nf6 15.a5–/+) 14.Bf1 (14.Bf3 Nf6–/+) 14...Ra8 15.f3 (15.Be2 Nf6–/+) 15...Qc7 (15...Nf6 16.f4–+) 16.fg4?? (better 16.Nde2 Nf6 17.Rb1–+) 16…Qg3–+ (16...Qg3 17.Ke2 Bg4 18.Kd3 Bd1 19.Nd1 c5–+) 0–1. croach – pcmvr, net–chess.com, 2017.

4.e3 Ne6 5.d4 c5 6.d5 Nc7 7.Nc3 d6 8.Nf3=.

4.e3 Ne6 5.Nf3 Nc5=.

4.e3 Ne6 5.Nf3 g6 6.Be2 Bg7 7.0–0 0–0 8.Bb2=.

4.e3 Nf5 5.d4 d5 6.Nf3 Nd6 7.Bd3 Bf5 8.Bf5=.

4.e3 Nf5 5.Nf3 d5 6.d4 Nd6 7.Bd3 Bf5 8.Bf5=.

3.a4 g6

4.Bb2 Bg7 5.Nc3 (5.e3 Nf3 6.Nf3 Bb2=) 5...Nf6 (5...e5 6.e3 Ne6 7.Bc4=) 6.e3 Ne6 (6...Nf5 7.Nf3=) 7.Rb1 (7.Nf3 c5=) 7...0–0 8.Be2 c5 9.Nf3 (9.bc6 dc6 10.Nf3 Qd6=) 9...d5 10.d4 (10.0–0 Qa5=) 10...cd4 11.Nd4 Nd4 12.ed4 (12.Qd4 Bf5 13.Qd2 Rc8=+) 12...Bf5 13.0–0 Rc8 14.Bf3 Qd7 (14...e6 15.g4 Be4 16.Ne4 Ne4 17.Be4 de4 18.f3=+) 15.Rc1 (15.Re1 Rc4=+) 15...Rc7 (better 15...Ne4 16.Qe1 Bd4 17.Nd5 Bb2 18.Be4 Rc4 19.Bf5 Qd5–/+) 16.Ne2 (better 16.Qd2!?=+) 16...Bh6–+ 17.c3 (17.Ra1 Bc2 18.Qe1 Rfc8–+) 17...Bc1 18.Bc1 (18.Nc1 Bg4–+) 18...Be4 19.Ng3 (19.Be4 Ne4 (worse 19...de4 20.Bd2–+) 20.Bb2 a6–+) 19...Rc3 20.Ne4 (20.Be2 Rfc8 21.Bd2 Rc2–+) 20...de4 21.Be2 Rfc8 22.Bb2 (22.Bf4 Nd5 23.Bg5 Ra3–+) 22...Rc2 23.Ba3 Qe6 24.Bc5 Qa2 (24...R8c5?! 25.dc5 Rc5 26.Qd4–+; 24...R2c5?! 25.dc5 Rc5 26.Qd2–+) 25.Re1 (25.Bg4 Rc7 26.b6 ab6 27.Bb6–+) 25...Rd2 26.Qd2 (26.Qc1 Re2 27.Re2 Qe2–+) 26…Qd2 (26...Qd2 27.Kf1 Rc7–+) 0–1. mic – pcmvr, net–chess.com, 2017.

4.c3= Nf5 (4...Ne6 5.e4=) 5.Bb2 (5.e4 Nd6 6.d3 Bg7+=) 5...e5 (5...Nf6 6.Nf3=) 6.e4 Nfh6 (6...Ng7 7.d4 ed4 8.cd4=) 7.c4 Qh4 (7...Bg7 8.d4=) 8.Qf3 (8.Be5 Bc5 9.d4 Bb4 10.Nd2 Qe4 11.Qe2 Qe2 12.Ne2+–) 8...Bb4?? (8...d6 9.Nc3=) 9.g3?? (better is 9.Be5 f6 10.Bc7+–) 9...Qe7= 10.Bc3 (10.Bh3 Nf6=) 10...Bc3 (10...Bc5 11.Qd3+=) 11.Qc3 (11.Nc3 Nf6=) 11...d6 12.d4 (12.a5 Nf6=) 12...ed4+= 13.Qd4 Nf6 14.f3 0–0 (14...Nf5 15.Qd3+=) 15.g4 (15.Kf2 a6=) 15...c5 (better is 15...Nhg4 16.fg4 Ne4–/+) 16.Qc3?? (16.bc6 Nhg4 17.fg4 Ne4=) 16...Nd7 (better is 16...Ne4 17.Qe3 Qh4 18.Ke2 Nf2 19.Qf2 Re8 20.Qe3 Re3 21.Ke3 Qf6–+) 17.Nd2= Re8 18.a5 b6 19.a6 Ne5 (19...Qh4 20.Kd1=) 20.h3 (20.0–0–0 Qh4+=) 20...Qf6= 21.Ke2 (better is 21.0–0–0 Neg4 22.Qf6 Nf6 23.Ne2=) 21...Qe6?? (21...Neg4!? 22.Qf6 Nf6=) 22.Ra4 (22.g5 Nf5 23.ef5 Qf5+/–) 22...Qf6 (22...Qe7 23.f4 Nd7 24.Kd1+=) 23.Qe3+= Be6?? (better is 23...Qh4+=) 24.Qh6+– Rad8 (24...Nd7 25.Kd1+–) 25.g5 (better is 25.Kd1+–) 25...Qf4 26.h4?? (better is 26.Kd1+–) 26...d5 (26...f6 27.h5 Nf7 28.hg6 Nh6 29.gh7 Kh7 30.Rh6 Kg7–+) 27.Nh3?? (27.cd5 Bd5 28.Bh3–+) 27...Qg3?? (27...Bh3 28.cd5 f5 29.Bh3 Nf7–+) 28.Nf2 (28.cd5 Bd7 29.Kd1 Nf3 30.Be2 Nd2 31.Kd2 Bh3 32.Rh3 Qh3 33.Bd3–+) 28...dc4–+ 29.Ra3 f5?? (better is 29...Rd2 30.Kd2 Qf2 31.Kc1 Rd8–+) 30.Kd1 (better is 30.gf6 Rd7 31.Qg5 Qg5 32.hg5+–) 30...Qf2–+ 31.h5 (31.Be2 Nf7 32.h5–+) 31...Qd2 0–1. yeatond – dyeaton (1685), net–chess.com, 2007.

4.e3 Nf5 5.Bb2 Bg7 6.Bg7 Ng7 7.c4 (7.Nf3 Nf6+=) 7...e6 (7...e5 8.d4 ed4 9.ed4=) 8.Nc3 Qf6 (8...e5 9.Nf3 d6 10.d4+=) 9.Ne4 (9.d4 d6+–) 9...Qf5 (9...Qe7 10.d4+=) 10.Ng3 Qe5 (10...Qf6 11.d4+=) 11.Nf3 Qd6 12.Be2 Nf6 13.0–0 h5 14.d4 b6 (14...h4 15.Nh1+–) 15.a5 (better 15.e4 Qf4 16.e5+–) 15...c6? (better 15...h4 16.Nh1 h3+–) 16.ab6+– Qb8 17.ba7 Ra7 18.Ra7 Qa7 19.bc6 dc6 20.d5 (better 20.Ng5!?+–) 20...cd5 (20...h4 21.Nh1 ed5 22.cd5+–) 21.cd5 0–0 (21...Nd5 22.Qd2+–) 22.de6+– Be6 23.Nd4 (23.Qd6 Nd5+–) 23...Rd8 (23...h4 24.Nh1+–) 24.Bf3 (24.Qd3 Qc7+–) 24...Bf5 (24...Bc4 25.Re1+–) 25.Qe2 (25.Ngf5?! Nf5 26.Nc6 Rd1 27.Na7 Rd2+–) 25...Bg4? (25...Qc5 26.Ra1+–) 26.h3 (better 26.Nc6 Qa8 27.Nd8 Qd8 28.Rd1+–) 26...Bf3 27.Qf3 (27.gf3?! Qd7 28.Kh2 Ne6+=) 27...Qa6 28.Kh2 (28.Rc1 Qb6+–) 28...Qd6 29.Kh1 Nd5 30.Rc1 (30.Ne4 Qc7+–) 30...Qa3 (30...Qf6 31.Qe2+–) 31.Rc6 (31.Rb1 Qd6+–) 31...Qa4 (31...Qa8 32.Rc5+–) 32.Nge2 (32.Rc5 Qa8+–) 32...Qd1 33.Kh2 Ne7 34.Rc1 Qd2 (34...Qa4 35.Kg1+–) 35.Qf6 Qc1?? (35...Ngf5 36.Nf5 Nf5+–) 36.Nc1 (36.Qe7?! Qc8=) 36...Nd5 (36...Rd7+–) 37.Qd8 Kh7 38.Qd5 Ne6 39.Ne6 (39.Ne6 h4 40.Qd7 Kg8 41.Qe8 Kh7 42.Qf7 Kh6 43.Qf8 Kh5 44.Qh8) 1–0. AleksandrNekhoroshik – Ce1945, lichess.org, 2021.

3.Bb2 Nb5

4.a4 Nd6 5.Ba3 e6 6.Bd6 cd6 7.e3 e5 8.Qf3 Nf6 9.Bc4 (better 9.Nc3=+) 9...b6?? (better 9...e4 10.Qg3 d5–/+) 10.Qa8+– g6 (10...d5 11.Bd5 Qc7 12.Nf3+–) 11.Qa7 Bg7 (11...d5 12.Bb5+–) 12.Qa8 (better 12.Nc3 d5 13.Nd5 Nd5 14.Bd5 0–0+–) 12...Bb7 (12...Qc7 13.Ba6 Ke7+–) 13.Qb7 0–0 14.Bd5 Nd5 15.Qd5 Qe7 (15...Qc7 16.Nc3+–) 16.Nc3 Re8 (16...Rc8 17.Nf3+–) 17.Ne4 (17.Rb1!? Qd8+–) 17...h6 18.Nd6 e4 (18...Qe6 19.c4 Qd5 20.cd5+– (20.Ne8 Qg2 21.Ke2 Qh1–+)) 19.Ra3 1–0. atif_zubair – gab_Z, lichess.org, 2019.

4.e3 a6 5.a4 Na7 6.c4 d6 7.Be2 Bf5 8.Nf3 h6 (8...e5 9.0–0=+) 9.Qb3 Rb8 10.Nd4 Be4 11.d3 (better 11.0–0!?=+) 11…Bg2–+ (11...Bg2 12.Rg1 Bh3–+) 0–1. GuestJXBM – GuestXYTF, freechess.org, 2017.

4.e3 Nd6 5.Nf3 Nf6 6.Be2 g6 7.0–0 (7.Nc3 Bg7=) 7...Bg7=+ 8.Ne1 (8.d3 0–0=+) 8...0–0–/+ 9.f4 (9.d4 b6–/+) 9...Nfe8 (9...b6 10.Nc3–/+) 10.Bg7=+ Ng7 11.a3 b6 12.Bf3 Rb8 13.Nc3 Ngf5 14.Rb1 Nh4 15.a4 Nf3 16.Qf3 Bb7 17.Qe2 Qc8 18.a5 Ba6 19.d3 b5 20.Nd5 c6?? (better 20...Qd8=+) 21.Ne7+– Kg7 22.Nc8 Rfc8 23.Qg4 (23.e4 b4+–) 23...f5 24.Qg5 Nf7 (24...Re8 25.Nf3+–) 25.Qe7 Rc7 (25...Rb7 26.e4 fe4 27.f5+–) 26.c4! Rbb7 (26...bc4 27.Rb8 Pinning (27.Rb8 Deflection)) 27.Nf3 d6 28.Qh4 (28.Qe8 bc4 29.Rb7 Bb7+–) 28...c5 Black plans b4 29.Ng5 Ng5 30.fg5 b4 (30...bc4 31.Qf4 Rb1 32.Rb1+–) 31.d4 (better 31.e4 Kh8 32.ef5 Rg7+–) 31...Bc4 32.dc5 Bf1 33.Kf1 (better 33.Qd4 Kf7 34.Qd5 Kg7 35.Kf1 h6 36.Qd6 Rf7+–) 33...dc5 34.Qh6 (better 34.Qf4!? Re7 35.Qd6 Rbc7 36.Qf6 Kg8+–) 34...Kg8 35.Qh4 Kg7 36.Qc4 (36.Qf4 Re7 37.Qd6 Rbc7 38.Qf6 Kg8+–) 36...h6 37.h4 (37.gh6 Kh7+–) 37...Rc6 (37...hg5 38.Qd5 Kh6 39.h5+–) 38.a6 (better 38.Rd1 Re7 39.Rd8+–) 38...Rbb6 (38...Rbc7+–) 39.Rd1 Rc7 (39...Rd6 40.Rd6 Rd6 41.gh6 Kf6 42.Qc5 Rd1 43.Ke2+–) 40.Rd5 (40.Rd8 hg5 41.hg5 Rf7 42.Qh4 Rc7 43.Qh6 Kf7 44.Qf8 Ke6 45.Qf6) 40...Rbc6 (40...hg5 41.Rd8 gh4 42.Qh4+–) 41.e4 (41.Rd8 hg5 42.hg5 Rf7 43.Qh4 Rfc7 44.Qh6 Kf7 45.Qf8 Ke6 46.Qf6) 41...fe4 42.Qe4 Rf7 43.Kg1 Rcc7 (43...Rc8 44.h5! gh5 45.Qe5 Kg8 46.g6 Rf5 47.Qe6 Kg7 48.Rd7 Rf7 49.Rf7 Kg8 50.Qc8) 44.Re5 (44.Qe5 Kh7 45.Rd8 Rf1 46.Kf1 Rf7 47.Ke2 Rg7 48.Qe8 c4 49.Qh8) 44...c4 (44...hg5 45.Re6 Rf1 46.Kf1 Rf7 47.Ke2 Rf5 48.h5 Kh7 49.Rg6 g4 50.Qe7 Rf7 51.Qf7 Kh8 52.Rg8) 45.Rb5 (45.Re8 Rf8 46.gh6 Kh7 47.Rf8 Rd7 48.h5 Rd1 49.Kh2 Rh1 50.Kh1 Kh6 51.Qg6) 45...b3 (45...Rc8 46.h5 gh5 47.gh6 Kh8+–) 46.Qd4 (46.Qe5 Kg8 47.Rb8 Rf8 48.Qc7 b2 49.Qc4 Kh7 50.Rb7 Kh8 51.Qc3 Rf6 52.Qf6 Kg8 53.Qd8) 46...Kh7 47.gh6 (47.Rb8 Rc8 48.Rc8 Rg7 49.Qd8 c3 50.Qh8) 47...Rfd7+– 48.Qf6 (better 48.Qc3 Rd1 49.Kh2+–) 48...c3 (48...Rf7 49.Qc3 b2+–) 49.Rb3 (49.h5 Rc6 50.Qc6 Rd6 51.Qc7 Rd7 52.Qd7 Kh6 53.Qf7 gh5 54.Rh5) 49...c2+– 50.Rc3 Rd1 51.Kh2 c1Q 52.Rc1 Rdc1 53.Qf2 R1c6 54.Qe2 Rd6 (54...Kh6 55.Qe5 Kh7+=) 55.Qb2 (better 55.Kh3!?+=) 55...Ra6= (55...Kh6?? 56.Qh8 Rh7 57.Qf8 Rg7 58.Qd6+–) 56.Qb8 Rac6 57.Qb2 (57.g4 a5=+ (57...Kh6 58.Qh8 Rh7 59.g5 Kh5 60.Qh7 Kg4 61.Qd7 Kh4 62.Qc6 Kg5 63.Kg3 Kf5 64.Qc5 Ke4 65.Qa7 Ke5 66.Qe7 Kd5 67.Kf4 Kc4 68.Qe2 Kb4 69.Ke5 Kc5 70.Qc2 Kb5 71.Kd5 Kb6 72.Qc6 Ka7 73.Qc7 Ka8 74.Kc6 g5 75.Qb7)) 57...a5 (57...Rc4 58.Qf6–/+) 58.Qa2 Ra6 59.Qa4 (59.g4 a4= (59...Kh6?? 60.Qg8 Raa7 61.Kg3 Rc3 62.Kf4 Rc4 63.Qc4+–)) 59...Raa7 60.g3 Rcb7 61.Kh3 Kh6 62.Qf4 (62.g4 Rd7=+) 62...Kh7–/+ 63.Qa4 Rb4 64.Qc6 a4 (64...Rab7 65.Qc2–/+) 65.Qc5 (better 65.h5!? Rbb7 66.Qg6 Kh8 67.Qh6 Kg8 68.Qe6 Kg7 69.Qg6 Kf8 70.Qd6 Kf7 71.Qa3=) 65...Rbb7–/+ 66.Qa3 Rb3 67.Qc5 Rbb7 68.Qa3 Rb3 (better 68...Re7–+) 69.Qc5= Rbb7 ½–½. Akrapovik (1655) – Dauren9999 (1900), lichess.org, 2021.

4.e4 Nd6 5.e5 Nf5 6.Nf3 e6 7.d4 d5 8.Bd3 Ngh6 9.Nbd2 Bb4 10.0–0 0–0 11.Ng5?? (better is 11.c3 Be7 12.Qc2=+) 11...Nd4 (better is 11...Qg5 12.Nf3 Qh5–+) 12.c3?? (better is 12.Nh7 Nhf5 13.Nf8 Qf8 14.c3+–) 12...Qg5–+ 13.cb4 Nc6 (better is 13...Qe5!? 14.Rc1 Ne2 15.Qe2 Qb2 16.Rc7 Qa2–+) 14.Nf3 Qf4 15.Bc1 Qb4–/+ 16.a4 Nf5 17.Ba3 Qf4 18.Bf8 Kf8 19.Re1 Nfd4 20.Bh7?? Nf3–+ 21.Qf3 Qf3 22.gf3 g6 23.f4 Kg7 24.Bg6 fg6 25.Kh1 Nb4 26.Rg1 Nd3 27.Rg5 Nf2 28.Kg2 Ne4 29.Rg4 c5 30.Rg1 c4 31.Kf3 c3 32.Rg6 Kf8 33.Rg8 Ke7 34.R1g7 1–0. gtate (1810) – ofi, net–chess.com, 2002.

3.c4 c6

4.Bb2 Nf5 5.e4 Nd6 6.e5 Nf5 7.bc6 dc6 8.d4 Be6 (8...Qb6 9.Bc3=) 9.Nf3+= Ngh6 (9...Rb8 10.Bd3+=) 10.Bd3+/– f6 (10...Bd7 11.0–0+/–) 11.0–0 fe5 12.Ne5 b5? (better is 12...Qd6+/–) 13.Nc6+– Qc7 14.cb5 Nd4 15.Bd4 Ng4 16.g3 h5 17.Bg6 Bf7 18.Bf7 Kf7 19.Qf3 Kg6 20.Qe4 Kg5 21.h4 Kh6 22.Qe6 Nf6 23.Be3 g5 24.Bg5 Kh7 25.Qf7 Bg7 26.Bf6 Rag8 27.Ne7 Qd8 28.Qg6 1–0. tonjan (1670) – jaunis111, internet, 2007.

4.e3 Nf5 5.a4 (5.e4 Nd4=) 5...cb5 (5...e5 6.e4 Nd4 7.Ne2=) 6.ab5 a6 7.Nc3 e6 8.Qb3 d6 9.g4 (9.Nf3 Nh4+=) 9...Nfe7 10.d4 e5 11.d5 (11.Bg2!?=) 11...Bg4=+ 12.Be2 Bf5 13.e4 Bg6 (13...Bc8 14.Nf3=+) 14.Nf3 (14.c5 a5 (< 14...dc5 15.ba6 Nf6 16.Qb7+–) 15.b6 Nc8 16.Qb5 Ke7+–) 14...Qd7 (14...f5 15.ba6 Ra6 16.Rb1 fe4 17.Qb5 Qd7 18.Qd7 Kd7 19.Ng5=+ (19.Rb7?? Kc8 20.Rb4 ef3 21.Bf3 Nf6–+)) 15.ba6 ba6 (better is 15...Ra6 16.Ra6 ba6+/–) 16.Nb5?? (16.c5 Rc8 17.Ra6 Rc5 18.Be3 Rc3 19.Qc3+–) 16...Qb7?? (better is 16...Be4 17.Qa4 Nc6=+) 17.Nd6+– (17…Kd8 18.Nb7 Kc7 19.d6 Kd7 20.Ne5 Kc8 21.Qb6 Kb8 22.Nd7 Kc8 23.Qc7) 1–0. chessdv8 – kilmer48, Live Game Caissa's Web, 2004.

3.c4 e5

4.Bb2 Bc5 5.e3+= Qe7?? (5...Ne6 6.Be5 d6 7.Bb2+=) 6.Nf3?? (6.ed4 Bd4 7.Nc3 Nf6+–) 6...d6?? (better is 6...Nf3 7.Qf3 Nf6=) 7.ed4+– (7.Nd4 ed4 8.Bd3 de3 9.fe3 f5+/–; worse is 7.Bd4 ed4 8.Be2 de3 9.de3 Nf6+=) 7...ed4 (7...e4 8.Ng5! (8.dc5?! ef3 9.Be2 fe2 10.Qe2 f6+/–) 8...Bb6 9.c5 dc5 10.dc5 Qg5 11.cb6 cb6 12.h4+–) 8.Be2 Qe4 (8...Nf6 9.0–0 (9.Nd4?! Qe5 10.f4 Qf4+–) 9...0–0 10.Na3+– (10.Nd4?! Qe5=)) 9.0–0 f6 (9...Nf6 10.d3 Qg6+–) 10.Nh4 (better is 10.Re1 Kf8 11.d3+–) 10...Qh4= 11.g3 Qe4?? (better is 11...Qg5=) 12.Bh5 (12.Re1 Qe5+–) 12...g6 13.Bf3 (13.Re1 Qe5 14.Bf3 a6+–) 13...Qe5?? (better is 13...Qd3+=) 14.Re1+– Bh3 (14...Ne7 15.Re5 fe5 16.d3+–) 15.Re5 fe5 16.Bg2 (16.Bb7 Rb8 17.Bc6 Bd7 18.Bd7 Kd7+–) 16...Be6 (16...Bg2 17.Kg2 0–0–0 18.d3+–) 17.d3 (17.Ba3 Bb6+–) 17...0–0–0 (17...Rb8 18.Nd2 Nf6 19.Nb3+–) 18.Ba3 (better is 18.Nd2 Rf8+–) 18...Nh6 (18...Ba3 19.Na3 Ne7 20.Qf3+–) 19.Qf3 Rdf8 (19...Bb6 20.Qb7 Kd7 21.c5 dc5 22.Nd2+–) 20.Qb7 Kd7 (20...Kd8 21.Qb8 Kd7 22.Bc6 Ke7 23.Qc7 Kf6 24.Nd2+–) 21.Qc6 Ke7 22.Qc7 Bd7 23.Qa7 (better is 23.Bc5 dc5 24.Bc6+–) 23...Ba7–+ 24.Bc6?? (24.Nd2–+) 24...Bf5 (24...Bc6 25.bc6 Ng4 26.f4 ef4 27.Nd2–+) 25.f3 (25.Nd2 Bd3 26.Re1 Ke6–+) 25...Bd3 26.Nd2 Bf5 (26...Nf5 27.Rc1–+) 27.g4 (27.Re1 Nf7–+) 27...d3 (better is 27...Bd7 28.Ne4 Nf7 29.Bd7 Kd7 30.Rb1–+) 28.Kf1 (28.c5 Bd7 29.Bd7 Kd7 30.b6–+) 28...Bg4 29.Ne4 (29.Rb1 Be3 30.Bb4–+) 29...Rf3 30.Ke1 (30.Kg2 Nf5 31.c5 d2 32.cd6 Kd8 33.Nd2 Ra3–+) 30...Re3 (better is 30...d2 31.Kd2 Ra3–+) 31.Kf1 Rf8 32.Kg1 Rg3 33.Kh1 Bf3 0–1. Tiedemann,Marcel (1750) – Taulien,Christian (2110), remoteschach.de, 2002.

4.Bb2 d6 5.e3 =.

4.Bb2 Nf6 =+.

4.Nc3 g6 5.e3= Ne6 6.Be2 (6.d4 ed4 7.ed4 Bb4=) 6...Nf6 7.Qc2 (7.Bb2 Bg7=) 7...Bc5 (7...Bg7 8.Bb2=) 8.Nf3+= Bd6 (8...d6 9.0–0+=) 9.d4 (9.0–0 0–0+/–) 9...ed4 10.Nd4 (10.ed4 c5 11.d5 Nd4 12.Nd4 cd4+/–) 10...c6 (10...Bc5 11.Nb3+=) 11.0–0+/– 0–0 12.f4 (12.Re1 Re8+=) 12...Re8 (12...Qe7 13.f5 Ng7 14.fg6 fg6 15.Qd3+=) 13.Rf3 (13.Ne6 de6 14.bc6 bc6+=) 13...Nd4 (13...cb5 14.cb5 Nd4 15.ed4=) 14.ed4 Bb4 (14...cb5 15.Nb5 Be7+=) 15.a4 (15.f5 cb5 16.fg6 fg6 17.Nb5 d5+=) 15...b6 (15...d5 16.bc6 dc4 17.Be3+=) 16.Ba3 (16.f5 Bc3 17.Rc3 a6+/–) 16...Ba3= Black fights for the Initiative 17.Ra3 d5 18.bc6 (18.cd5!? Nd5 19.Nd5 (worse is 19.bc6 Nc3 20.Rac3 Qd4 21.Kf1 Bg4–/+) 19...Qd5 20.bc6=) 18...dc4–/+ 19.Nb5 (19.Rf2!? Be6 20.d5 Nd5 21.Nd5 Bd5 22.Bc4 Bc6 23.Ra1–/+) 19...a6 20.c7 (20.Qc4 ab5 21.ab5 Ra3 22.Ra3–+) 20...Qd5 (20...Qd7 21.Qc4 ab5 22.ab5 Ra3 23.Ra3 Qe7–+) 21.Bc4–/+ Qd7 22.Rad3 (22.Qd2 Bb7 23.Rfd3 Rac8–/+) 22...Re1–/+ 23.Kf2 (23.Rf1!? Rf1 24.Kf1 ab5 25.Bb5–+) 23...Rh1–+ 24.Nc3 Qc7 25.Qb3 Bb7 (25...Rh2?! 26.Kg1 Rh5 27.Nd5 Nd5 28.Bd5–/+) 26.Nd5 Bd5 (26...Ne4 27.Ke2 Bd5 28.Bd5–+) 27.Bd5 Qe7?? (better is 27...Rd8 28.Bc4 Rc8–+) 28.Bc4?? (better is 28.Rde3 Ng4 29.Kg3 Ne3 30.Re3+/–) 28...Qe1 0–1. Golem_01 – Raffaela_0002, computer chess game, 2000.

4.e3 Ne6 5.Bb2 =.

4.e3 Ne6 5.d4 ed4–/+ 6.ed4 c6 (6...Bb4 7.Bd2 Qe7 8.Bb4 Qb4 9.Qd2 Qd2 10.Kd2 Nd4 11.Nc3+=) 7.bc6 (7.Nf3!?=) 7...dc6+= 8.Nf3 Bb4 9.Nbd2 (better is 9.Bd2!? Be7 10.Be3=) 9...Nd4–/+ 10.Be2? (10.Nd4 Qd4 11.Rb1 Bc3–/+) 10...Nf3 (better is 10...Bc3!? 11.Nd4 Ba1–+ (11...Qd4?! 12.Rb1–/+; 11...Bd4?! 12.Rb1–/+)) 11.Bf3–/+ Nf6 12.0–0 0–0 13.Qc2 Bc5 (13...Re8 14.Rd1–/+) 14.Ne4 Ne4 15.Be4 g6 16.Bh6 (16.Bb2 Re8+=) 16...Re8–/+ 17.Rad1 Qh4 18.Qc3?? (better is 18.Qd2–/+) 18...f6 (18...Qh6 19.Qf3 Qh4 20.Rde1–+) 19.Bc1 (19.Be3 Be3 20.Bg6 hg6 21.fe3–+) 19...Be6 (better is 19...Re4 20.Be3 Rc4–+) 20.Bd3 Bd4 21.Qd2 Be5 22.Qh6 (better is 22.g3!? Qd4 23.Qc2–/+) 22...Bh2–+ 23.Kh1 Bg3 (better is 23...Qh6!? 24.Bh6 Be5–+) 24.Qh4–/+ Bh4 25.g3 Bg5 26.Bg5 (26.f4 Bh6–+) 26...fg5 27.Kg2 Kg7 28.Rfe1 Bg4 29.Re8 Re8 30.Rd2? (better is 30.f3 Be6 31.Kf2–+) 30...Rd8 31.Rb2 (31.Kf1–+) 31...Rd3 32.Rb7 Rd7 33.Rb4 Be2 34.c5 (34.f3 Rf7–+) 34...a5 (34...g4 35.Rb1–+) 35.Ra4 (35.Rb2 Bd3–+) 35...Ra7 (35...g4 36.f3 gf3 37.Kf2–+) 36.a3 (36.Re4 Bd3 37.Rd4 Bf5–+) 36...Bb5 (better is 36...g4 37.f4 gf3 38.Kf2–+) 37.Rd4 a4 38.Kf3 (38.Rd8 Rf7–+) 38...Re7 39.Kg4 (39.Re4 Rf7 40.Kg2 Rf5–+) 39...h6 (39...Re5!? 40.Rd7 Kh6 41.Rd4–+) 40.f4 gf4 41.Kf4 Kf6 (41...Rf7 42.Ke3 Rf5 43.Rf4–+) 42.g4 (42.Rd6 Re6–+) 42...Re5 (42...g5!? 43.Kf3–+) 43.Rd6 Re6 44.Rd4 (44.Rd7 g5 45.Kf3 Be2 46.Kg3 Re3 47.Kf2 Bg4 48.Rd6 Re6–+) 44...g5 45.Kf3 Ke5 46.Rd2 (46.Ke3 Rf6 47.Rd2 Rf4–+) 46...Rf6 47.Kg3 Ke4 0–1. alaamattar (2100) – mic (2100), net–chess.com, 2012.

3.e3 Nb5??

4.Bb5+– b6 5.Bb2 (5.Nf3 Bb7+–) 5...Bb7 6.Nf3 g5?? (6...e6+–) 7.Bh8 g4 (7...a6 8.Bd3 g4 9.Ne5+–) 8.Ne5 Bg2 (8...c6 9.Qg4 Nf6 10.Qc4+–) 9.Rg1 (better is 9.Qg4 Nf6 10.Qg2 c6 11.Bf6 ef6 12.Nc6 dc6 13.Bc6 Ke7 14.Qe4 Kd6 15.Ba8 f5 16.Qd5 Ke7 17.Qe5 Kd7 18.Qf5 Kd6 19.Qf4 Ke7 20.Qe4 Kd7+–) 9...Bf3 (9...c6 10.Qg4 Nf6 11.Qg2 cb5 12.Bg7+–) 10.Nf3 gf3 (10...c6 11.Bd3 h5+–) 11.Rg8 f6 12.Bg7 Kf7 13.Rf8 Qf8 14.Bf8 Rf8 15.Qf3 (15.Qf3 c6 16.Qh5 Ke6 17.Bd3+–) 1–0. Trkn – adam, itsyourturn.com, 2000.

4.Bb5+– e5 5.Bb2 (--> 1.b4 e5 2.Bb2 Nc6 3.b5 Nd4 4.e3 Nb5 5.Bb5).

4.Bb5+– Nf6 5.Bc4 (5.d4 c6 6.Bd3 d6+–) 5...e6 6.Bb2 Be7 7.d3 d5 8.Bb3 Bd7 9.Nd2 Bb5 10.Ngf3 Bd6 11.e4 Qe7?? (11...de4 12.de4 Bf4+–) 12.e5 Bc5 13.ef6 gf6 14.Qe2 e5 (14...Rg8 15.0–0+–) 15.Bd5 0–0–0 16.c4 Ba6 17.d4 (17.Rb1 c6 18.Be4 Qe6+–) 17...Bd6 (17...Rd5 18.Qe4 Rd4 19.Nd4 ed4 20.Qe7 Be7 21.Bd4+–) 18.Qe4 c6 19.Bc6! bc6 (19...ed4 20.0–0–0+–) 20.Qc6 Kb8 21.Qa6 ed4 22.Kf1 Bc5 23.Re1 (23.Rb1 Rd6 24.Bd4 Rb6 25.Rb6 ab6 26.Bc5 Qc5+–) 23...Qb7 24.Qb7 (24.Qf6 Rhe8 25.Rb1 Rd6+–) 24...Kb7 25.Nb3 Bb4 26.Rd1 (26.Rb1!? Bc3+–) 26...Bc3 27.Bc3 dc3 28.Rd8 (28.Rc1 Rhg8+–) 28...Rd8 29.Ke2 Re8 30.Kd3 c2 31.Re1 Rd8 32.Kc2 Kb8 33.Nfd4 Rc8 34.Kc3 Rg8 35.g3 h5 (35...Rc8 36.Re7 Rc7 37.Re8 Rc8 38.Nc6 Kc7 39.Rc8 Kc8 40.Na7 Kb8 41.Nc6 Kc8 42.Ne7 Kd8 43.Nd5+–) 36.Re7 h4 37.Rf7 (37.Rf7 Rc8 38.Na5+–) 1–0. Le Duigou,Goulven (1640) – Le Gros,Nicolas, Hennebont Grand Prix, 2006.

4.Bb5+– g6 5.Bb2 Nf6 6.Nf3 Bg7 7.0–0 0–0 8.Bc4 d5 9.Bb3 c6 10.Ne5 Ng4 11.Ng4?? (better 11.f4+–) 11...Bb2–+ 12.Nh6 Kg7 13.Nf7 Ba1?? (better 13...Kf7 14.Nc3 Ba1 15.Qa1 Kg8–/+) 14.Nd8+– Rd8 15.d4 (15.c3 a5+–) 15...Bb2 (15...a5 16.a4 b5 17.ab5 cb5 18.Qf3+–) 16.a3 (16.Qd2 Bf5+–) 16...c5 (16...Ba1 17.c4 dc4 18.Bc4+–) 17.c3 cd4 (17...c4 18.Bc4! dc4 19.Qc2+–) 18.ed4 b5 (18...Bf5 19.Qe2 Bb1 20.Qe7 Kh6 21.Qe3 Kg7 22.Qe5 Kh6 23.Rb1+–) 19.Qc2 Bc3 (19...Ba3 20.Na3 a6 21.Ra1+–) 20.Nc3 Ba6 (20...e6 21.Nb5 Kg8 22.Qc5+–) 21.Nd5 Rac8 22.Qe4 Re8 23.Qe5 Kh6 24.Qf4 (24.Ne3 g5 25.Bf7 b4 26.Nf5) 24...Kg7+– 25.Re1 Rf8 26.Re7 Kh8 (26...Rf7 27.Rf7 Kh8 28.Qe5 Kg8 29.Ne7) 27.Qe5 Kg8 (27...Rf6 28.Qf6 Kg8 29.Qg7) 28.Nf6 (28.Qg7) 28...Kh8 29.Rh7 1–0. Adjailton (1865) – aref1234, lichess.org, 2016.

4.Bb5+– a6

5.Be2 b5 6.Nf3 b4 (6...Bb7 7.Bb2+–) 7.a3 ba3 (7...e6 8.0–0+–) 8.Ba3 a5 (8...Nf6 9.0–0+–) 9.Ne5 a4 (9...Bb7 10.0–0 Qc8+–) 10.Bc4 d5 (10...e6 11.Qf3 Nh6 12.Qa8 Ba3 13.Na3+–) 11.Bb5 c6 (11...Qd7 12.Nd7 Bd7 13.Bd7 Kd7 14.Qg4 Kd8 15.Qh5+–) 12.Bc6 Bd7 13.Qh5 g6 14.Nd7 Rc8 (14...gh5?? 15.Nf6) 15.Nf6 1–0. Pierre – Waldorffy, internet, 2020.

5.Be2 c6 6.Nf3 Qa5 (6...Nf6 7.0–0+–) 7.0–0 Nf6 8.Bb2 Ne4 (8...e6 9.d4+–) 9.Nc3 (9.d3 Nc5+–) 9...Qb4 (9...Nf6 10.a4+–) 10.Rb1 Nc3 (10...Nf6 11.h3+–) 11.Bc3 (worse 11.dc3 Qa5+–) 11...Qa3 (11...Qd6 12.Ne5 Qc7 13.Bc4+–) 12.Ra1 (better 12.Ne5!? d5 13.Bd3 Qd6+–) 12...Qc5 (12...d6 13.Qb1+–) 13.Bb2 (13.Ne5 d6 14.Bd4 Qa5+–) 13...a5 (13...f6 14.c4+–) 14.d4 (14.Bd4 Qd6+–) 14...Qa7 (14...Qb6 15.Rb1+–) 15.Ne5 (15.c4 d6+–) 15...a4 (15...d6 16.Nd3+–) 16.a3 (16.Qd3 d6 17.Nf3 e6+–) 16...Qb8 (16...d6 17.Nd3+–) 17.Bc4 (better 17.e4 f6 18.Nc4+–) 17...Qd6 (17...d5 18.Ba2 Bf5+–) 18.Bf7 Kd8 19.Bb3! Qb8 (19...ab3 20.Nf7 Double attack) 20.Nf7 Kc7 21.Ba2 Ra5 (21...Rg8 22.d5 d6 23.dc6+–) 22.Nh8 Rb5 23.Rb1 (better 23.Qf3 Rb2 24.Qf8 b6+–) 23...g5 24.d5 (24.c4 Ra5+–) 24...e5 25.Be5 (25.Nf7 d6 26.dc6 Qa8+–) 25...d6 26.Bg3 g4 27.Rb5 (better 27.Qd3 Rb1 28.Rb1+–) 27...c5 28.Rc5 Kd8 29.Nf7 Ke7 30.Ng5 (30.Nd6 Kd8 31.Qd4 Qd6 32.Bd6 Bd6 33.Qf6 Be7 34.Qh8 Bf8 35.Qf8 Kd7 36.Rc8 b5 37.Qd8) 30...Qa7 31.Rc7 (31.Rc8 Qc5 32.Rc5 Kf6 33.Nh7 Ke7 34.Bh4 Kf7 35.Rc7 Ke8 36.Qg4 Be7 37.Re7 Kd8 38.Qd7) 31...Kd8 32.Rh7 Bd7 33.Bh4 (33.Qa1 Kc7 34.Qc3 Qc5 35.Qc5 Kd8 36.Bd6 Ke8 37.Bf8 Kd8 38.Be7 Ke8 39.Rh8) 33...b5 34.Ne6 Ke8 (34...Kc8 35.Nf8 Qb6 36.Nd7 Qa7 37.Qd4 Qd4 38.ed4 b4 39.Nb6 Kb8 40.Re1 ba3 41.Re8) 35.Qg4 Be6 36.Qe6 Qe7 37.Re7 Be7 38.Qe7 1–0. GuestTFGS – GuestKKLL, freechess.org, 2020.

5.Be2 d5 6.Bb2 Nf6 7.Nf3 e6 8.0–0 Bd6 9.c4 c6 (9...0–0 10.Ne5+–) 10.cd5 cd5 11.Nc3 0–0 12.d4 h6 (12...b5 13.Bd3+–) 13.Qb3 Qc7 14.Rfc1 Qd7 15.h3 b5 16.a4 (better is 16.Ba3 Qe7 17.Bd6 Qd6+–) 16...Bb7? (16...b4 17.Nd1 Qe7+–) 17.ab5 ab5 18.Ra8 Ra8 19.Ra1 (better is 19.Ne5!? Qd8+–) 19...b4 (19...Ra1 20.Ba1 b4 21.Nb5+–) 20.Ra8 Ba8 21.Na2 Qb7 22.Ne5 Be5 (22...Ne4 23.Qa4 Qb8 24.Nd7+–) 23.de5 Ne4 24.Qb4 Qb4 25.Nb4 Kf8 26.Bd4 Ke7 27.f3 Ng5 (27...Ng3 28.Bc5 Kd8 29.Bd3+–) 28.Kf2 (28.Bc5!? Kd8 29.Bf8 g6 30.Bh6 Nh7+–) 28...Kd7 29.Bb5 Kc7 (29...Kd8 30.Bd3 g6 31.h4+–) 30.Na6 Kb7 (30...Kd8 31.Bb6 Ke7 32.Bc5 Kd8 33.Bf8+–) 31.Nc5 Kc7 32.Be8 (better is 32.h4 Nf3 33.gf3 Bc6+–) 32...Kd8 33.h4 (better is 33.Bf7 Nf7 34.Ne6 Kd7 35.Ng7 Ng5+–) 33...Ke8 34.hg5 hg5 35.Kg3 Ke7 36.Kg4 f6 37.ef6 (better is 37.Kh5!? Kf7+–) 37...gf6 38.g3 e5 (38...Bc6 39.Bc3+–) 39.Bc3 Kd6 40.Nd3 Bb7 41.Kf5 Ke7 42.Nc5 (42.Kg6 Ba6 43.Bb4 Ke8+–) 42...Bc8 43.Kg6 Kd6 44.Bb4 Kc6 (44...d4 45.e4 g4 46.fg4+–) 45.Kf6 d4 46.ed4 ed4 47.Nd3 (47.Kg5 Kb5 48.Ba3 Kc4+–) 47...Kb5 48.Ke5 (better is 48.Bd2+–) 48...Kc4 49.f4 gf4 50.Nf4 d3?? (50...Kb4 51.Kd4 Kb5 52.Kd5+/–) 51.Nd3 Kd3 52.Bc5 Kc4 53.Be3 Kd3 54.Bh6 Ke2 55.g4 (55.Ke4!?+/–) 55...Bg4= ½–½. Fournier,Frederic (1830) – micky3779 (1820), Active, 2005.

5.Be2 e5 6.Bb2 d5 (6...d6 7.Nc3+–) 7.Nf3 (7.Be5 Nf6+–) 7...g6? (better is 7...e4 8.Nd4 Qg5+–) 8.Ne5 Qd6 (8...f6 9.Nd3 Bd6+–) 9.Nf7! Kf7 10.Bh8 b5 (10...Nf6 11.c4+–) 11.Bf3 (better is 11.a4 b4 12.c3+–) 11...d4 (11...Ne7 12.d4+–) 12.Bd4 (better is 12.Ba8 Nf6+–) 12...a5 (12...c6+–) 13.Ba8 Bh6 14.Qf3 Qf6 15.Bf6 Nf6 16.Nc3 (16.Qc6 Bd7 17.Qc7 Bg7+–) 16...b4 17.Nd5 Bg4 18.Qf6 Ke8 (18...Kg8 19.Ne7) 19.Qe7 1–0. Trkn – I's, itsyourturn.com, 2000.

4.Bb5+– c6

5.Ba4 d5 6.d4 Nf6 7.Nd2 (7.Bb3 Bg4 8.Ne2 e6+–) 7...e6 8.c3 Bd6 9.Ngf3 0–0 (9...Qa5 10.Bb2+–) 10.Bc2 Qe7 (10...Qa5 11.Bb2+–) 11.a4 b6 12.Ne5 (12.a5 Ba6+–) 12...Bb7 13.Ndf3 (13.a5 ba5 14.0–0 Rfb8+–) 13...Nd7 (13...Ne4 14.Bb2+–) 14.h4 (14.a5 c5+–) 14...f6 (14...c5 15.a5+–) 15.Nd7 Qd7 16.Qd3 e5?? (better 16...f5+–) 17.Qh7 Kf7 18.Bg6 (18.de5 Be5 19.Bg6 Ke7 20.Qg7 Kd6 21.Qd7 Kd7 22.Ne5 fe5+–) 18...Ke7 19.Qg7 Kd8 20.Qd7 Kd7 21.Bf5 (21.h5 Rh8+–) 21...Kc7 22.Ba3 (22.h5 e4 23.Nh4 Rh8+–) 22...e4 (22...Rg8 23.de5 fe5 24.Ng5+–) 23.Bd6 Kd6 24.Nd2 Rg8 25.g4 (25.Rh2 Bc8 26.Bc8 Rac8+–) 25...Bc8 26.Bc8 (26.a5!? Bf5 27.gf5 b5+–) 26...Rac8 27.Rg1 f5 (27...Rg7 28.Ke2 Rh8 29.h5+–) 28.g5 Rh8 (28...Rg7 29.Nf1+–) 29.Rh1 Rh5 (29...Rcg8 30.f4 ef3 31.Nf3+–) 30.0–0–0 (30.Nf1 Ke6 31.Ng3 Rh7+–) 30...Rg8 (30...Rch8 31.Rdg1 Rh4 32.Rh4 Rh4 33.g6+–) 31.f3 Rgh8 32.f4 (better 32.g6!? Ke6 33.Rdg1 Kf6 34.fe4 fe4+–) 32...Rh4 33.Rh4 Rh4 34.Nb3 (34.c4 dc4 35.Nc4 Kd5+–) 34...Rh3 35.Re1 c5 36.dc5 bc5 37.Na5 Rg3 (37...c4 38.Rg1 Rh7 39.Rg2+–) 38.c4 (better 38.Rd1!? c4+–) 38...d4 39.Kd2 d3 (39...a6 40.Re2+–) 40.Kc3 Rg2 (40...Kd7 41.Rh1 Re3 42.Rh7 Ke6 43.Rh6 Ke7 44.Rf6+–) 41.Nb3 (better 41.Rh1+–) 41…Rc2 0–1. afsharian – kevinalvarez, lichess.org, 2018.

5.Bd3 d5 6.Bb2 f6 (6...Nh6 7.Nf3+–) 7.Qh5 g6 (7...Kd7 8.Bh7 Nh6 9.Bg6+–) 8.Bg6! Kd7 (8...hg6 Exploits the pin 9.Qh8) 9.Bh7 Kc7 10.Be5 (better is 10.Nc3+–) 10...fe5 (10...Kb6 11.Na3 c5 12.Rb1 Kc6+–) 11.Qe5 Kd7 (11...Kb6 12.Qh8 Nf6 13.Nf3+–) 12.Bf5 e6 (12...Ke8 13.Bg6 Kd7 14.Qh8+–) 13.Be6 Ke8 14.Bc8 Qe7 (14...Ne7 15.Bb7 Rh6 16.Ba8 Qa8 17.Nc3+–) 15.Qh8 Nf6 16.Bb7! Rb8 (16...Qb7 A deflection 17.Qf6) 17.Bc6 Kd8 18.Nc3 d4 19.Nd5 Qd6 20.Nf6 Qc6 21.Qf8 Kc7 22.Qg7 Kb6 23.Nd7 (23.Rb1 Qb5 24.Rb5 Kb5 25.Qa7 Rc8 26.a4 Kc6 27.Qd7 Kc5 28.ed4 Kb6 29.Nd5 Ka6 30.Qc8 Ka7 31.Qc7 Ka6 32.Qb6) 23...Kb5 24.a4 Kb4 25.Qd4 Qc4 26.Rb1 Ka5 (26...Ka3 27.Qa1 Qa2 28.Qc3 Rb3 29.Rb3 Qb3 30.Qb3) 27.Qa7 Qa6 28.Qc5 Ka4 (28...Rb5 29.Rb5 Qb5 30.Qb5) 29.Ra1 (29.Rb8?! Qf1 30.Kf1=; 29.Nb8?! Qf1 30.Kf1=) 1–0. wampo (1820) – Da_Master_Fitz, GameColony.com, 2002.

5.Bd3 d6 6.Nf3+–.

5.Bd3 e5 6.Nf3+–.

5.Bd3 Nf6 6.Bb2 d6 7.f4 Bg4 8.Be2 (8.Nf3 e6+–) 8...Qd7 (8...Be2 9.Ne2 e6 10.0–0+–) 9.Nf3 (9.Bf6 Be2 10.Ne2 gf6+–) 9...Ne4 (9...e6 10.0–0+–) 10.d3 (10.0–0 e6+–) 10...Nc5 11.Nc3 +–. pierre – lachezar, ChessHere.com, 2005.

5.Be2 a6 6.c4 e6 7.Nf3 g6 8.Bb2 Nf6 9.0–0 Bh6 (9...Be7 10.e4!+–) 10.Qc2 Qc7 (10...b5+–) 11.Bf6 (11.Bf6 0–0 12.Qb2+–) 1–0. GuestGCPD – GuestLPWT, freechess.org, 2017.

5.Be2 c5 6.Nc3 b6 (6...Nf6 7.Ba3+–) 7.Nf3 Nf6 8.Ne5 d6 (8...Bb7 9.0–0+–) 9.Bb5 Bd7 10.Nd7 Nd7 11.Qf3 Rc8 12.Bb2 f6 (12...e6 13.Ne2+–) 13.Nd5 Kf7 (13...c4 14.a4 a6 15.Ba6+–) 14.Nf4 Ne5 (14...e5 15.Qd5 Ke8+–) 15.Qd5 e6 16.Qe6 1–0. Gu65 – Gu59, free online game, 2018.

5.Be2 d5 6.Bb2 e6 (6...Bf5 7.Nf3+–) 7.c4 (7.Nf3 Nf6+–) 7...Nf6 8.Nf3 Ne4 (8...Be7 9.0–0+–) 9.d3 (9.0–0 dc4 10.Bc4 Nf6+–) 9...Bb4 10.Nbd2 0–0? (11.de4 de4+–; 10...Nd2 11.Nd2 0–0+–). coloplayah (2015) – msfnet, net–chess.com, 2005.

5.Be2 d5 6.Nf3 Nf6 7.0–0 Bf5 8.Bb2 e6 9.Nh4 g5 (9...Bg6+–) 10.Nf5 ef5 11.c4 (11.Bd3 Bg7+–) 11...f4 (11...Bg7 12.cd5 Qd5 13.f4+–) 12.cd5 Nd5 (12...Bg7 13.dc6 bc6+–) 13.Bh8 f6 (13...Qd7 14.Bg4 f5 15.Bh5 Kd8 16.Nc3+–) 14.e4 (14.Qc2 Qe7+–) 14...Nb6 15.Bh5 (better 15.Qb3 Qe7 16.Bg4 Bg7 17.Bg7 Qg7+–) 15...Ke7 (15...Kd7 16.Qg4 Kc7 17.Qf5+–) 16.Qb3 (16.e5 Kd7 17.Qc2 Be7 18.Qh7 f5+–) 16...Kd6 17.Nc3 (better 17.e5 Kc7 18.Bf6 Qd5 19.Bg5 Nc4+–) 17...Rc8 18.e5! Kc7 (18...Ke5 19.Rae1 Combination; 18...fe5 19.Qa3 Double attack (19.Ne4 Deflection; 19.Ne4 Decoy)) 19.Bf6 Qd3 20.Bg4 Re8 21.Qf7 Qd7 22.Bd7 Nd7 (22...Re7 23.Be7 Nd7 24.Bf8 Kc8 25.Bd6 b5 26.Qe8 Kb7 27.Qd7 Kb6 28.Qc7 Ka6 29.Qc6 Ka5 30.Qb5) 23.Qe8 Nf6 (23...Kb6 24.Rab1 Kc5 25.Na4 Kc4 26.Qd7 Bb4 27.Rfc1 Kb5 28.Qb7 Ka5 29.Rb4 c5 30.Rc5) 24.Qf8 Nd7 (24...Kd7 25.Qg7 Ke6 26.ef6 Ke5 27.f7 Kf5 28.f8Q Kg4 29.Qh7 c5 30.f3) 25.Nd5! cd5 (25...cd5 26.Rfc1 Mate attack) 26.Rfc1 Kb6 27.Rab1 Ka6 28.Qa3 1–0. DEFFM – GuestZSXQ, freechess.org, 2019.

5.Be2 Nf6 6.c4 e5 7.Bb2 d6 8.Nf3 Be7 9.0–0 Be6 10.d3 0–0 11.Nbd2 d5 (11...Re8 12.e4+–) 12.Ng5 (12.Be5 dc4 13.dc4 Nd7+–) 12...dc4 (12...Qd6 13.Ndf3 Nd7 14.Ne6 Qe6 15.Qc2+–) 13.Ne6 fe6 14.Nc4 b5 (14...e4 15.Qc2+–) 15.Ne5 c5 16.Bf3 Rc8 17.Nc6 Qc7 (17...Qd7 18.Ne7 Qe7 19.Qb3+–) 18.Ne7 (18.Qb3!? Nd5 19.Bd5 ed5 20.Qd5 Kh8+–) 18...Qe7 19.Qb3 c4 20.dc4 (20.Qb5 c3 21.Bc1 Qd7+–) 20...bc4 21.Qc3 Qc5 (21...Nd5 22.Qe5 Rf5+–) 22.Ba3 Qc7 23.Bf8 Rf8 (23...Kf8 24.Rac1+–) 24.Rab1 (better 24.Rac1 Rc8+–) 24...Nd7 (24...Nd5 25.Bd5 ed5 26.Rb5+–) 25.Rb7 Qd8 (25...Qe5 26.Qc4 (26.Rd7?! Qc3 27.Ra7 Qe5=+) 26...Nf6 27.Rd1+–) 26.Rd1 (better 26.Qc4 Qe8 27.Bg4 Kh8+–) 26...Rf7 (26...Qf6 27.Qf6 Nf6 (worse 27...Rf6 28.Rdd7 Rf5 29.Bg4 h6 30.Bf5 ef5 31.Rg7 Kf8 32.Rgc7 c3 33.Rc8) 28.Ra7 Rc8+–) 27.Qc4 Rf3 28.Qe6 Kh8 29.Rdd7 Qg8 (29...Qa8 30.Rg7 Rh3 31.gh3 Qb7 32.Qg8) 30.Qg8 Kg8 31.Rg7 Kh8 (31...Kf8 32.gf3 a6 33.Rgc7 h6 34.Rc8) 32.gf3 a5 (32...a6 33.Rgd7 Kg8 34.Rd8) 33.Rg3 (33.Rgd7 Kg8 34.Rd8) 33...a4 (33...h6 34.Rbg7 h5 35.R7g5 h4 36.Rh5) 34.Rb8 1–0. GuestRVYW – GuestYWQZ, freechess.org, 2017.

3.e3 Nc2??

4.Qc2+– d5 5.Bb2 Bf5?? (5...Nf6+–) 6.Qf5 Nh6 (6...e6 7.Qc2+–) 7.Qc2 Nf5 (7...f6+–) 8.Qf5 e6 9.Qc2 c6 (9...Qd7 10.Nf3+–) 10.bc6 bc6 (10...Qc7 11.cb7 A) 11...Qc2 12.ba8Q (worse 12.ba8N Qb2 13.Nc7 Kd8=+; 12.ba8B?! Qb2 13.Bb5 Kd8=) 12...Ke7 13.Qb7 Kd8 14.Nc3 Qb2 15.Qb2 a5 16.Qb7 Bc5 17.Bb5 Be3 18.Qd7; B) 11...Qb7+–) 11.Qc6 Qd7 12.Qa8 Ke7 13.Ba3 Qd6 14.Bd6 Kd6 15.f4 (better 15.Qd8 Kc6+–) 15...Be7 16.Qh8 Bh4 17.g3 Bf6 18.Qf8 (18.Qb8 Kc6 19.Bb5 Kc5 20.Qa7 Kb5 21.Na3 Kc6 22.Rc1 Bc3 23.Rc3 Kd6 24.Qc7) 18...Be7 (18...Kd7 19.Bb5 Kc7 20.Qc5 Kb7 21.Qc6 Kb8 22.Ba6 Ba1 23.Qb7) 19.Qb8 Kc6 20.Na3! d4 (20...Ba3 21.Bb5) 21.Rc1 (21.Rc1 Bc5 22.Bb5 Kd5 23.Qe5) 1–0. GuestZSWT – GuestMSDV, freechess.org, 2016.

4.Qc2+– d6 5.d4 e5 +–.

4.Qc2+– d6 5.Nf3 Bg4 6.Be2 +–.

4.Qc2+– d6 5.Nf3 g6 (5...Bg4 6.Be2+–) 6.Bb2 Nf6 7.Be2 Bf5 8.Bd3 (8.d3 Bg7+–) 8...Bc8 (8...Bd3 9.Qd3 Bg7+–) 9.Be2 (9.0–0 Bg4+–) 9...Bf5 10.d3 d5 (10...Bg7 11.0–0+–) 11.0–0 Bh6 (11...Bd7 12.Nc3 c6 13.Ne5+–) 12.Nbd2 (12.Bf6 ef6 13.Rc1 Bf8+–) 12...a6 (12...Bg7 13.Rfc1+–) 13.a4 (13.Rfc1 ab5 14.Bf6 ef6 15.Qc7 Qc7 16.Rc7 b4+–) 13...ab5 (13...0–0 14.Nb3+–) 14.ab5 Ra1 15.Ra1 Ng4 (15...Bg7+–) 16.Bh8 d4 (16...f6 17.e4 Be6 18.h3 Nf2 19.Kf2+–) 17.Bd4 Qd6 (17...Bf8+–) 18.Ra8 Bc8 19.Rc8 Kd7 20.Ra8 Qh2 21.Nh2 Nh2 (21...c6 22.bc6 bc6 23.Ra7 Ke6 24.Qc6 Kf5 25.Bg4 Kg5 26.Ndf3) 22.Ne4 (22.Qc5 Bf4 23.ef4 Nf3 24.Bf3 e5 25.Qd5 Ke7 26.Bc5 Kf6 27.Qe5) 22...c6 (22...Nf3 23.Bf3 c6 24.bc6 bc6 25.Nc5 Kd6 26.Ra7 Be3 27.Rd7) 23.bc6 bc6 24.Ra7 Ke6 (24...Kd8 25.Qc6 Nf3 26.Bf3 Be3 27.Qd7) 25.Qc4 Kf5 26.Qf7 1–0. Vaast,Jean Philippe (1640) – Checkouri,Eloise, Sainte Marie op, 2005.

4.Qc2+– e5 5.Bb2 d6 6.Nf3 g6 (6...Nf6 7.Be2+–) 7.Be2 Bg7 8.0–0 Bf5 9.d3 Nf6 10.a4 0–0 11.e4 Bg4 12.Nbd2 a6 13.Rfc1 ab5 14.ab5 (14.Qc7?! ba4 15.Qc2 Bh6+–) 14...Ra1 15.Ba1 c6 (15...Bh6 16.d4+–) 16.bc6 bc6 17.h3 (17.Qc6 Bh6 18.Re1 Bd2 19.Nd2 Be2 20.Re2 Nh5+–) 17...Bd7 18.Nc4 d5 (18...Qe7 19.Rb1+–) 19.ed5 (19.Nce5!? c5+–) 19...Nd5 20.Nce5 Nb4 (20...Re8 21.Bf1+–) 21.Qb3 Nd5 22.Nd7 Qd7 23.Bg7 Kg7 24.Ne5 Qf5 25.Qb2 Qf6 (25...f6 26.Qb7 Kg8 27.Nc6 Qg5+–) 26.Rc6 Qf5 (26...Qd8 27.Ng6 f6 28.Nf8 Qf8 29.d4+–) 27.Ng6 f6 28.Nf8 Kf8 29.Qb8 (better is 29.Bf3 Qe5 30.Qe5 fe5 31.Bd5 Ke8+–) 29...Kg7 30.Qb7 Kg6 31.Rc5 Qe5 32.Bf3 Qe1 33.Kh2 Nf4 34.Be4 f5 (34...Qe4 35.Qe4 Kg7 36.Rc7 Kh6 37.Qh7 Kg5 38.h4 Kg4 39.f3) 35.Bf5 (35.Qb6 Ne6 36.Qe6 Kg7 37.Rc7 Kf8 38.Qc8) 35...Kf6+– 36.Qb6 1–0. hal1958 – dhbruch, playchess.de, 2003.

4.Qc2+– Nf6 5.Nf3 +–.

3.e3 Ne6

4.a4 a6 5.ba6 ba6 6.Nc3 (6.d4 Nf6=) 6...Bb7 (6...Rb8 7.e4=) 7.Rb1 Nf6?? (better 7...Rb8=) 8.Rb7+– g6 (8...Nc5 9.Rb1+–) 9.Ba3 (9.d4 d5+–) 9...Qc8 (9...Bg7 10.e4+–) 10.Qb1 Bg7 (10...a5 11.Nf3+–) 11.Ba6! 0–0 (11...Ra6 12.Rb8 Combination) 12.Ra7! Qa6 (12...Ra7 13.Bc8 Discovered attack (13.Bc8 Deflection)) 13.Ra6 Ra6 14.Be7 Re8 (14...Rfa8 15.Nge2+–) 15.Bf6 Bf6 16.Nge2 Rb6 17.Qa2 (17.Qd1 Bg7+–) 17...Ra8 (17...Reb8 18.0–0 Rb2 19.Rb1 Rb1 20.Nb1+–) 18.Nd5 (18.0–0 Rba6+–) 18...Rb7 (18...Ra4 19.Nf6 Kf8 20.Nd7 Kg7 21.Qa4 Rb1 22.Nc1 Rc1 23.Ke2 Rh1 24.Ne5 Rh2 25.Qe8+–) 19.Nf6 (19.Nf6 Kg7 20.Qa1 Ra4 21.Ne8 Kf8 22.Qh8 Ke7 23.0–0+–) 1–0. pcmvr – croach, net–chess.com, 2017.

4.Bb2 c5 5.c4 d5 6.cd5 Nc7 7.e4 Bd7 8.a4 e6? (8...Nf6 9.Qe2+=) 9.de6?? (better is 9.d6+–) 9...Ne6 10.Bc4 Ng5 11.d3 Nf6 12.Nd2 Be7 13.Ngf3 (13.e5!? Ng8+–) 13...Nf3 14.Nf3 (< 14.gf3 0–0+=) 14...Bg4 (14...0–0 15.e5 Ng4 16.d4+/–) 15.h3 Bf3 16.Qf3+– Qa5 17.Ke2 Qb4? 18.Rhb1 Qa5 19.e5 Nd7 20.Bf7 Kd8 21.e6 Nb6 22.Qb7 Bg5 23.Bg7 Re8 24.Be8 Ke8 25.Qf7 Kd8 26.Bf6 Bf6+– 27.Qf6 Kc7 28.Rc1 Qb4 29.e7 Nd5 30.Qc6 Kb8 31.e8Q 1–0. ISickboyI – Seimi Agus Eion, ChessWorld.net, 2005.

4.Bb2 c5 5.c4 d6 6.Nf3 Nc7 7.Nc3 e5 8.Qc2 (8.d4 cd4 9.ed4 Qe7+=) 8...Nh6 9.Be2 Bf5 10.d3 Ne6 11.Nd5 Nc7 12.e4 Nd5 13.cd5 Bg4 14.h3 (14.0–0 Be7+=) 14...Bf3= 15.gf3 Qa5 (15...Qg5 16.Bf1=) 16.Bc3+= Qb5 17.d4 c4 18.de5 de5 19.Be5 Bb4 (19...f6 20.Bd4 Rc8 21.Kd1+=) 20.Kf1 0–0 (20...f6!? 21.Bc4 Qd7+–) 21.Bc4 Qc5 22.Qb3 (22.Rg1 f6 23.Bf4 Nf7+–) 22...b5 23.Be2 Qe7 24.Bb2 a6 25.Rg1 g6 26.a4 ba4 27.Ra4 a5 28.Qe3 Qh4 29.Qd4?? (better 29.Kg2+–) 29...Qh3= 30.Rg2 f6 (30...Qh1 31.Rg1 Qh3 32.Rg2 Qh1 33.Rg1 Qh3=) 31.Kg1+= Bd6 32.Qe3 Kg7? (better 32...Rfb8!? 33.Qc1 Qd7+=) 33.e5+– fe5 (better 33...Nf5 34.Qd3 Be5 (worse 34...fe5 35.Rh2 Qh2 36.Kh2+–) 35.Be5 Ne7+–) 34.Be5?? (better 34.Rh2 Qd7 35.Qh6 Kg8 36.Bc3+–) 34...Be5=+ 35.Qe5 Kg8 36.d6 Attacks the isolani on a5 36...Nf7 37.Bc4 Rab8 (37...Qf3 38.Qd4 Rfe8 39.Ra1=+) 38.Bf7 (38.Ra1!?=) 38...Rf7–/+ 39.Re4 (39.Ra1 a4–/+ (worse 39...Rf3 40.Qa5 Rd3 41.Qa2 Kf8 42.Qc4=)) 39...Rb1 40.Re1 Re1 41.Qe1 Qd7 42.Qa5 Qd6 43.Qa2 Qd1 44.Kh2 Qf3 45.Rg3? (better 45.Qe6!?–/+) 45…Qf2–+ (45...Qf2 46.Rg2 Qa2 47.Ra2 h5–+) 0–1. GuestLZZB – Indonesianplayer, freechess.org, 2017.

4.Bb2 c5 5.c4 Nf6 6.Nf3 g6 7.Be2 (7.Bf6 ef6 8.Nc3 Bg7+=) 7...Bg7= 8.0–0 0–0 9.Qc2 (9.Nc3 a6=) 9...d5 (9...a6 10.a4=) 10.d4 (10.cd5 Qd5 11.Nc3 Qd6+=) 10...cd4= 11.ed4 (11.Nd4 Nd4 12.Bd4 Bf5=) 11...dc4 12.Bc4 a6 (12...Nf4 13.Bc1 Bf5 14.Qb3=+) 13.a4 (13.Na3 Nf4=) 13...ab5 14.ab5 Ra1 15.Ba1 Qc7 (15...Nf4 16.Rc1=) 16.Qb3 (16.Rc1 Qd6=) 16...Nd8 (16...Qf4 17.Qa3=) 17.Nbd2 (17.d5 Bf5+=) 17...Qb6 (17...b6 18.Re1+=) 18.Bb2 (18.d5 Bf5+=) 18...Bf5 19.Ne5 (better 19.d5+=) 19...Ne4? (better 19...Ne6+=) 20.Bf7?? (better 20.Ne4 Be5 21.de5 Be4 22.Rd1+–) 20...Nf7–+ 21.Ndc4? (21.Ne4!? Be5 22.de5 Be4–+) 21...Qc7 (21...Qe6 22.Qb4–+) 22.b6 (22.Rc1 Ned6–+) 22...Qb8 (22...Qc8 23.f3 Be6 24.Qb4–+) 23.Nf7 Rf7 (23...Kf7? 24.Nd6 Kf6 25.d5 e5 26.de6 Ke7 27.Ne4 (27.Bg7?! Nd6 28.Bf8 Qf8+–) 27...Bb2 28.Qb4 Ke6 29.Ng5 Kf6 30.Nh7 Kg7 31.Nf8+– (31.Qf8?! Qf8 32.Nf8 Kf8=)) 24.Ne5? (24.d5–+) 24...e6 (better 24...Be5 25.de5 Nd2–+) 25.Nf7= Nd2 26.Qb5? (better 26.Qd1 Nf1 27.Ne5 Nh2 28.Kh2=) 26...Nf1–+ (26...Kf7? 27.Qd7 Kf6 28.f4+–) 27.Qd7 (27.Ne5 Nd2 28.Qd7–/+) 27...e5?? (27...Qh2 28.Kf1 Qh1 29.Ke2 Bg4 30.Ke3 Qe1 31.Kf4 Qf2 32.Kg4 Qg2 (32...Qf7?! 33.Qd8 Bf8 34.Kg3–/+) 33.Kf4 Qf2 (33...Qb2?! 34.Qe8 Bf8 35.Nh6 Kg7 36.Qf7 Kh6 37.Qf8 Kh5 38.Qc5 e5 39.Qe5 Kh6 40.Qg5 Kg7 41.Qe7 Kg8 42.Qb7 Qd4 43.Kf3=) 34.Ke4 Qf7 (34...Qb2?! 35.Nh6 Bh6 36.Qe6 Kf8 37.Qf6 Ke8 38.Qe6 Kd8 39.Qd6 Ke8 40.Qe6 Kd8 41.Qd6 Ke8 42.Qe6=) 35.Qc8 Bf8–+) 28.Qe7?? (28.Qd5 Nd2 29.Nd6 Kh8 30.de5+–) 28...Bd3?? (better 28...ed4!? 29.Nd6 Nd2 30.Qf7 Kh8–/+) 29.Nd8?? (better 29.Nd6 Qf8 30.Qe6 Kh8 31.Nf7 Kg8 32.Ne5 Kh8 33.Nd3+–) 29...ed4?? (29...h6 30.de5 Nd2 31.Qf7 Kh8+–) 30.Qe6 Kh8 31.Nf7 (31.Qe8 Bf8 32.Qf8) 31...Kg8+– 32.Nh6 (better 32.Ne5! Kh8 33.Nd3+–) 32...Kh8+= 33.Nf7 Kg8 34.Nh6 (better 34.Ne5! Kh8 35.Nd3+–) 34...Kh8+= 35.Nf7 (better 35.g3 Bh6 36.Bd4 Bg7 37.Qd7+=) 35...Kg8+– 36.Nh6?? (better 36.Ne5! Kh8 37.Nd3+–) 36...Kh8+= 37.Nf7 (better 37.g3 Bh6 38.Bd4 Bg7 39.Qd7+=) 37...Kg8+– 38.Nh6?? (better 38.Ne5! Kh8 39.Nd3+–) 38...Kh8+= 39.Nf7 (better 39.g3 Bh6 40.Bd4 Bg7 41.Qd7+=) 39...Kg8+– 40.Nh6 (better 40.Ne5! Kh8 41.Nd3+–) 40…Kh8= ½–½. DEFFM – GuestSHDD, freechess.org, 2016.

4.Bb2 c5 5.Nf3+= d5 6.c4 (6.Be2 a6+=) 6...Nf6 (6...d4 7.Qc2+=) 7.cd5 Nd5 8.Bc4 Nb6 (8...Nec7 9.Ne5 e6 10.0–0+=) 9.Be2 Nc7 (9...Bd7 10.Ne5 Qc7 11.0–0+/–) 10.Qc2 e6 11.d4 (11.0–0 Ncd5+=) 11...cd4 12.Bd4 Bb4 (12...Bd7 13.Nc3+=) 13.Nbd2 0–0 (13...f6 14.Bb6 ab6 15.Rc1+=) 14.Bd3 (14.0–0 Ncd5+/–) 14...g6 (14...f5 15.0–0+=) 15.Rb1 (15.Rc1 Ncd5 16.0–0+/–) 15...Nbd5 (better is 15...Be7!?+/–) 16.e4+– Bd2 17.Qd2 (17.Kd2?! Nf4+=; 17.Nd2?! Nf4 18.Bf1 Qd4 19.Qc7 e5=) 17...Nf6 (17...Nb6 18.0–0+–) 18.0–0 b6 19.Rfc1 (better is 19.Rbc1 Nfe8 20.Rfd1+–) 19...Bb7?? (better is 19...Nfe8+–) 20.Bf6 Qf6 21.Rc7 Rab8 (21...Qd8 22.Rbc1 Rc8 23.Rc8 Bc8 24.Qh6+–) 22.Rbc1 Rfd8 (22...Kg7 23.Qe3+–) 23.e5 Qg7 24.Qe3 (24.Ng5 Qe5 25.Nf7 Qd5 26.Nh6 Kh8 27.Qc3 e5 28.Qe5 Qe5 29.Nf7 Kg8 30.Ne5 Bd5+–) 24...Rdc8 (24...Bf3 25.Qf3 Rd4+–) 25.Rb7! (25.Rb7 Rc1 26.Qc1 Rb7 27.Qc8 Qf8 28.Qb7+–) 1–0. Waibel,Ulrich – Oppe,Achim, compuserve, 1998.

4.Bb2 Nc5 5.c4 d5 6.cd5 Qd5 7.d4 Ne4 8.Nf3 Bg4 9.Qc2 Rc8?? (better is 9...Bf3 10.gf3 Ng5=) 10.Bc4+– Qf5 11.Bd3 Ngf6 12.Nbd2 Bf3 (12...e6 13.Ne4 Ne4 14.Bc3+– (< 14.Be4 Bb4 15.Kf1 Qb5 16.Bd3 Qa5+–)) 13.gf3 (13.Nf3?! e6+/–) 13...Qg5 14.Ne4 (14.Be4?! Ne4 15.fe4 Qb5+–) 14...Qg2 (14...Ne4 15.fe4 Qg2 16.0–0–0+–) 15.Nf6 ef6 16.0–0–0 Bd6 (16...c6 17.Be4 (17.Bh7?! g6 18.d5 Qf3 19.Bg6 fg6+–) 17...Rc7 18.bc6 bc6 19.h4+–) 17.Be4 c5 (17...Qg5 18.Bb7 Rb8+–) 18.f4 Qh3 (18...Qh1 19.Rh1 Rc7 20.d5+–) 19.Bf5 (19...Qh5 20.Bc8+–) 1–0. MrkT – Pauline Calf, internet, 2005.

4.Bb2 d6 5.a4 Bd7 6.c4 c6 7.d4 cb5 8.ab5 Nf6 9.Qf3 Qc7 10.Bc3 (10.Nc3!?+=) 10...g6 (10...Ng5!? 11.Qe2 Nge4=+) 11.Ba5= b6?? (11...Qc8 12.Nd2=) 12.Bc3 (better 12.Qa8 Nd8 13.Bd2 a5+–) 12...Bg7?? (better 12...Rc8=+) 13.d5 (better 13.Qa8 Qd8 14.Ra7+–) 13...Nc5 14.Nd2 (14.Qd1 0–0–/+) 14...0–0 (better 14...Bg4 15.Qg3 Nh5 16.Qg4 Bc3–+) 15.Nh3? (better 15.Qd1–/+) 15...e6 (better 15...Bg4 16.Qf4 Bh3 17.gh3 Nh5 18.Bg7 Nf4 (18...Kg7?! 19.Qd4 Nf6 20.Be2=+; 18...Ng7?! 19.Ne4=+) 19.Bf8 Kf8 20.ef4 e6–+) 16.de6 (16.Bf6 a5 17.ba6 Ra6 18.Ra6 Na6+–) 16...Be6?? (16...fe6 17.Qd1–/+) 17.Nf4?? (better 17.Bf6 Bg4 18.Qf4 Bf6 19.Qf6+–) 17...Ncd7 (better 17...Bg4!? 18.Qc6 Qe7–/+) 18.Ne6 fe6 19.Bd3?? (better 19.Qc6 Rac8 20.Qc7 Rc7 21.Be2=) 19...Nd5 (better 19...Nh5 20.Qe2 Bc3–+) 20.Qe2 (20.Bg7 Rf3 21.gf3–+) 20...Nc3 21.Qg4 Nb5! 22.Qe6 (22.cb5 Ba1 Discovered attack) 22...Rf7 (better 22...Kh8 23.cb5 Ba1 24.0–0–+) 23.Rb1 (23.cb5 Ba1 24.Bc4–+) 23...Nc3 24.Rb3 (24.Ne4 Nc5 25.Nc5 dc5–+) 24...Qc6 (better 24...Nc5 25.Rc3 Bc3 26.Qd5–+) 25.Ne4 (25.Be4 Ne4 26.Qe4 Rc8 27.Qc6 Rc6–+) 25...Ne4 (better 25...Nc5!? 26.Nc5 Qg2 27.Rf1 dc5 28.Ra3 Qh2 29.Kd2–+) 26.Be4 (26.Qe4 Qc8 27.Qd5–+) 26...d5 (better 26...Qa4 27.0–0 Nc5–+) 27.Qc6+– de4 28.Qa8 Rf8 29.Qa7 Nc5 30.Rb6 Nd3 31.Kd2 Nf2 32.Rf1 Be5 33.Re6 (33.Qe7 Rf5 34.Rb7 Rf3 35.Qe6 Rf7 36.Qf7 Kh8 37.Qh7) 33...Bh2 34.Qc5 (34.Re7 Be5 35.Re5 Rb8 36.Qb8 Kg7 37.Qb7 Kh6 38.Qe7 Nd3 39.Rh1) 34...Bg3 35.Re4 (35.Qd5 Kg7 36.Qg5 Rf7 37.Qg3 Rd7 38.Rd6 Ra7 39.Rf2 Ra2 40.Kc3 Ra3 41.Kb4 Ra4 42.Ka4 Kg8 43.Rd7 h5 44.Qb8) 35...Rd8 (better 35...Ne4 36.Kc2 Nc5–+) 36.Rd4+– Ne4 37.Ke2 Nc5 38.Rd8 Kg7 39.Rc8 (better 39.Rd5 Ne6 40.Rd7 Kg8+–) 39...Ne4 40.Ra1 Be5 (40...Bd6 41.Ra7 Kf6 42.Rh7+–) 41.Ra7 Kh6 42.Kf3 Nd2 43.Kg4 Ne4 (43...Nf1 44.Re7 Bd6 45.Re6+–) 44.c5 Nf6 45.Kf3 g5 46.c6 g4 47.Ke2 Ne4 (47...Kg6 48.c7 Bc7 49.Rcc7+–) 48.Ra6 (48.Re8 Nc3 49.Kd3 Nb5+–) 48...Nc3 49.Kd3 Nb5 50.Re8 (better 50.c7 Kh5 51.Ra5+–) 50...Bg7 (50...Nc7 51.Re5 Na6+–) 51.c7 Kg5 (51...Kh5 52.c8Q Kh4 53.Rg8 Nd6 54.Qd8 Kg3 55.Qd6 Kf2 56.Rg7 h5 57.Qh2 Kf1 58.Rf7 Ke1 59.Ra1) 52.c8Q Nd6 (52...Na7 53.Ra5 Kh4 54.Qd8 Kg3 55.Qb8 Kf2 56.Qh2 Nb5 57.Ra2 Bb2 58.Rb2 Kf1 59.Qh1) 53.Qc5 (53.Qd8 Bf6 54.Rg8 Kh4 55.Qd6 Bg7 56.Rg7 h5 57.Qh2) 53...Nf5 54.Rg8 g3 (54...Kh4 55.Qf5 Kg3 56.Rg7 h5 57.Qf4 Kg2 58.Ra2 Kg1 59.e4 g3 60.Qc1) 55.Rg7 Kh4 (55...Kh5 56.Qf5 Kh4 57.Rh7) 56.Qf5 h5 (56...h6 57.Rh6) 57.Qf4 (57.Ra4) 1–0. hamidrezaderakhshan – ALDUIN_A (1605), lichess.org, 2020.

4.Bb2 d6 5.Nf3 c5 6.Bc4 Nf6 7.0–0 b6 8.Bf6 ef6 9.Bd5 Rb8 10.Bc6 Bd7 11.Bd7 Qd7 12.a4 a6 13.c4 Be7 14.d4 cd4 15.Nd4 Nd4 16.Qd4 0–0 17.Nc3 a5 18.Nd5 Bd8 19.Rfd1 Re8 20.Nb6 Bb6 21.Qd6 Qb7 22.c5 Bc7 23.Qd5 Qc8 24.c6 Rd8 25.Qf3 Rd1 26.Rd1 Qe6 27.Rc1 Qd6 28.g3 Qa3 29.Qd1 Rd8 30.Qc2 g6 31.Rb1 Kg7 32.b6 Be5 33.b7 Bc7 34.h4 h5 35.Kg2 Qd6 36.Rb2 Qd5 37.e4 Qe5 38.f4 Qe6 39.Rb3 f5 40.ef5 gf5 41.Rb5 Qd6 42.Kh3 Kf8 43.Rf5 Qe6 44.Kg2 Rd2 45.Qd2 Qf5 46.Kf3 Qg4 47.Kf2 Qe6 48.Qc2 Qd5 49.Qb2 Qc5 50.Ke2 Qc4 51.Ke1 Qe4 52.Kf2 Qe8 53.Qb5 Qb8 54.Qc5 Ke8 55.Ke3 Qd8 56.Qh5 Qd6 57.Qb5 Qe6 58.Kd4 Qd6 59.Ke4 Qe6 60.Kf3 Qd6 61.b8Q Bb8 62.c7 Ke7 63.cb8Q Qd1 64.Qe2 Qe2 65.Ke2 1–0. Machete99 – guest1140, ICC, 2002.

4.Bb2 d6 5.Nf3 Bd7 6.c4 Nc5 7.d4+– Ne6 8.Bd3 g6 (8...Nf6 9.0–0+–) 9.d5 Ng7 10.a4 e6 11.Nbd2 ed5 (11...Nf6 12.0–0+–) 12.cd5 Ne7 13.e4 c6 14.0–0 cd5 15.ed5 Nd5 16.Re1 Be6 17.Be4 Nb4 18.Bb7 Rb8 19.Ne4 Rb7 (19...Qb6 20.Rb1 Rb7 21.Bg7 Bg7 22.a5+– (22.Rb4?! d5 23.a5 Qd8+=; 22.Nd6?! Ke7 23.Nb7 Qb7 24.Rb4 Bc3+–)) 20.Bg7 Bg7 21.Nd6 Ke7 22.Nb7 Qd1 (22...Qc7 23.Qb3 Qc3 24.Rab1 Qb3 25.Rb3+–) 23.Rad1 (23.Red1?! Ba1 24.Ra1 Bd5+–) 23...Bc3 24.Re3 Bg7 (24...Rc8 25.Nd6 Rd8 26.Nf5 gf5 27.Rd8 Kd8 28.Rc3+–) 25.Nc5 Rd8 26.Rd8 Kd8 27.Ne6 fe6 28.Re6 (28.Ng5 Kd7+–) 28...Nd5 (28...Kd7 29.b6 ab6 30.Rb6 Nd5 31.Rb7 Nc7+–) 29.Rd6 (29.Rd6 Ke7 30.Rd5+–) 1–0. DEFFM – GuestGGWT, freechess.org, 2018.

4.Nc3 c5 5.Nf3 (5.e4 d6+=) 5...d5= 6.d4 (6.Bb2 Nf6=) 6...Nf6 7.Be2 (7.Bd3 c4 8.Be2 Nc7=) 7...cd4 8.ed4 Qc7 9.Bd2 Bd7 (9...g6 10.0–0=) 10.0–0 Rc8 (10...g5 11.Rb1=) 11.a4 (11.Bd3 Nf4=) 11...g6 (11...Nf4 12.Ne5=) 12.Bd3 (12.a5 Nf4+=) 12...Nf4 (12...Bg7 13.a5=) 13.Ne5 (13.Bf4 Qf4 14.Ne2 Qc7=) 13...Nd3 14.cd3 Bg7 (14...Qb6 15.Nd7 Kd7 16.Rc1=) 15.Qf3 Be6 (15...Qd6 16.Rac1=) 16.Rfc1 (16.a5 0–0=) 16...Qd6 (16...Qb6 17.Qe3=) 17.Ne2 (17.Bf4 Qb6 18.a5 Qd8+=) 17...0–0 18.h3 (18.a5 Bf5=) 18...Nd7 19.Ng4 (19.Bf4 Ne5 20.Be5 Be5 21.de5 Qe5+=) 19...Bg4+= 20.Qg4 e6 21.Rcb1 (21.Qf3 a6+=) 21...Rfe8 22.Bf4 Qe7 23.Bg5 Nf6 (23...Bf6 24.Bf6 Nf6 25.Qf3+=) 24.Qf4 (24.Qh4 Rc2 25.Re1 Rec8+=) 24...Nh5 (24...Rc2 25.Re1+=) 25.Qd2 Qd6 26.Rc1 (26.a5 Qd7+=) 26...b6 (26...a6 27.Rab1+=) 27.Rc3 (27.Rc8 Rc8 28.Rc1 Rc1 29.Qc1 Qf8+=) 27...Bf6 (27...Rc3 28.Qc3 h6 29.Be3+=) 28.Bh6 Rc3 (28...Rc3 29.Qc3 Ng7+=). Psion – Psion, 3 Min/Zug, 1989.

4.c4 d5 5.cd5 Qd5 6.a4 g6 7.Bb2 Bg7 8.Bg7 Ng7 9.Nc3 Qd6 10.Nf3 Bg4 11.Qb3 (11.h3 Bf3 12.Qf3 0–0–0+–) 11...0–0–0 (11...Bf3 12.gf3 e5 13.Bc4=) 12.Nd4 (better 12.Ne4!? Qe6 13.Qe6 Be6 14.d4+=) 12...e5 13.Ne4 Qd7 14.Nc5 Qd5 (better 14...Qe7!? 15.Nc6 A) 15...bc6?? 16.bc6 Rd3 17.Qb7 (17.Qd3?! Qc5 18.Qb5 Qb5 19.ab5 Kb8+=) 17...Kd8 18.Qb8 (18.Bd3?! Qc5 19.0–0 Ne7+=; 18.Nd3 Qd6+–) 18...Bc8 19.Nb7 (19.Bd3?! Qc5 20.0–0 Ne6+=; 19.Nd3 e4 20.Qa7 Qf6+–) 19...Ke8 20.Bd3+–; B) 15...Qc5 16.Nd8 Kd8 17.Qf7 Ne8=) 15.Qd5+= Rd5 16.Ndb3 Ne6 (16...Rd6 17.Bc4+=) 17.Ne6 (17.Bc4!? Rd6 18.f3 Nc5 19.Nc5+– (19.fg4?! Nb3 20.Bb3 f6=)) 17...Be6+= 18.Bc4 Rd6 19.Be6 Re6 20.0–0 Nf6 21.f3 Rd8 22.Ra2 Nd5 23.Nc5 Red6 24.Ne4 R6d7 25.Ng5 (25.Nc5!? Re7 26.Rb1=) 25...h6–/+ 26.Ne4 b6 27.a5 f5 28.Nf2 Nb4 29.Rb2 (29.Ra4 ba5 30.d3 Kb7–/+) 29...Nd3 (better 29...ba5!? 30.e4 Rd2 31.Rd2 Rd2 32.ef5 gf5–+) 30.Nd3 Rd3 31.ab6 cb6 32.Rd1 Kb7 33.Kf2 R8d5 34.Ke2 Ra3 35.Rc1 Rc5 36.Rcc2 Rc2 (better 36...g5!?=+) 37.Rc2+– Rb3 38.Rc6 Rb5 39.Rg6 a5 40.Rh6 a4 41.Rd6?? (41.Rh7 Ka6 42.Rc7 a3+=) 41...Rc5?? (better 41...a3 42.Rd3 Ra5 43.Ra3 Ra3–+) 42.Rd3 b5 43.Ra3 Kb6 44.d4 (better 44.Ra2!?=) 44...ed4–/+ 45.ed4 Rc2 46.Kf1 (46.Ke3 Rg2 47.h3 Rh2–/+) 46...Ka5 47.g4? (better 47.Re3–/+) 47...fg4 48.fg4 Rh2 49.d5? (49.Re3 Kb4 50.Kg1 Rd2–+) 49...Rd2 (49...b4 50.Re3 b3 51.Kg1–+) 50.Rg3 (50.Ke1 Rd5 51.Ke2 b4–+) 50...Rd5 51.g5 b4 52.g6 Rd8 (52...b3 53.Ke2 b2 54.Rg1–+) 53.Rg5 Kb6 54.g7 Rg8 55.Rg6 Kc5 (55...Kb5 56.Rg5 Kc4 57.Rg4 Kc3 58.Rg3 Kb2 59.Rg4–+) 56.Rg5 (56.Ke2 a3 57.Kd3–+) 56...Kc4 57.Rg4 Kb3 58.Rg3 Ka2 Black prepares b3 59.Rg2 Ka3 60.Rg3 b3 61.Ke1 Ka2 62.Rg2 (62.Rg1 b2 63.Kd2 b1Q 64.Rb1 Kb1 65.Kc3 a3 66.Kd4 a2 67.Kc3 a1Q 68.Kd2 Qe5 69.Kd3 Rd8 70.Kc4 Rd4 71.Kb3 Qe3) 62...b2 63.Kd1 (63.Rd2 Kb3 64.Rd1 a3–+) 63…a3 (63...a3 64.Kd2 b1Q 65.Kc3 Ka1–+) 0–1. beatmeeasy (1955) – Feyzi02 (1965), lichess.org, 2020.

4.c4 d6 5.a4 Bd7 (5...a6 6.Bb2=) 6.Nf3 g6 7.Bb2 f6 8.d4 Bg7 9.Bd3 Nh6 10.Nbd2 0–0 11.Qc2 a6 12.0–0 ab5 13.ab5 Ra1 14.Ra1 c6 15.Qb3 cb5 16.cb5 Qb6 (better 16...Nf7!?+–) 17.Bc4+– Kh8?! (17...Kf7+–) 18.Be6 Be6 19.Qe6 Qb5 20.Ba3 Nf7 (20...Ng8 21.Rb1 Qa4 22.Bb2+–) 21.Qb3 (21.Qe7!? Qc6+–) 21...Qf5? (21...Qb3 22.Nb3 Ra8 23.d5+–) 22.h3 (22.Qb7 Re8+–) 22...Ng5 (22...Nd8 23.Bb4+–) 23.Ng5 (23.Qb7 Nf3 24.Nf3 Qc8+–) 23...Qg5 (23...fg5 24.f3+–) 24.Qb7 f5 25.Rc1 f4 26.Nf3 Qa5 27.Qb4 (27.Bb4 Qa4+–) 27...Qa6 (27...Qb4 28.Bb4 fe3 29.fe3+–) 28.e4 Ra8 (28...Qa7 29.Rc6+–) 29.Bb2 Qa7 (29...Qa2 30.Qb7 Re8 31.Rc7+–) 30.d5 Bb2 31.Qb2 Kg8 32.Ng5 Qa3 (32...Qb8 33.Qc3 Qf8+–) 33.Rc8! Rc8 Theme: Deflection from a3 34.Qa3 Rc1 1–0. BeepBeepImAJeep – sallegreco (1875), lichess.org, 2016.

4.c4 d6 5.Nc3 c6 (5...Nf6 6.d4=) 6.a4 (6.d4 Nf6+=) 6...cb5 (6...a6 7.Bb2=) 7.cb5 (7.ab5 a6+=) 7...g6 (7...Nf6 8.Nf3=) 8.Bb2 Bg7 9.Nf3 Nf6 10.d4 Qa5 (10...0–0 11.Bd3+=) 11.Qb3 (11.Bd3 0–0+=) 11...Qd8 (11...Nc7 12.Rc1+=) 12.Bc4 b6 (12...0–0 13.0–0+=) 13.0–0+/– Bd7 14.Nd2 0–0 15.Na2 (15.Rfc1 Re8+/–) 15...Qc8 (15...h6 16.Rfc1+=) 16.Rac1 Qb7 17.Nb4 Rac8 18.Rc2 (18.Rc3 Nc7+=) 18...Nc7 (18...Ng5 19.Rfc1+=) 19.d5 (19.Nc6 Rce8+/–) 19...e6 (19...Bf5 20.Rc3+=) 20.Nc6 (better is 20.Bf6 Bf6 21.Ne4+=) 20...Rce8? (20...Ncd5 21.Bf6 Bf6 22.Bd5 ed5 23.Qd5 Bc6 24.bc6+/–) 21.e4?? (better is 21.Bf6 Bf6 22.Ne4+–) 21...ed5+= 22.ed5 Bf5 23.Rcc1 Ne4 (23...Na8 24.Bd3 Bd3 25.Qd3+/–) 24.Ne4 Be4 (better is 24...Re4!? 25.Bg7 Kg7+/–) 25.Ba3+– Be5 (better is 25...Bh6 26.Bd6 Bc1 27.Rc1 a5+–) 26.Ne5 Re5 (26...de5 27.Rfd1+–) 27.Bd6 Rg5 (27...Rfe8 28.Qg3 (worse is 28.Be5 Re5 29.Rfe1 a6+–) 28...R5e7 29.Be7 Bd5 30.Bd6 Bc4 31.Rc4+–) 28.f3 Re8 (28...Bd5 29.Bc7 Rc8 30.Bd5 Rd5 31.Rfe1+–) 29.Bc7 (29.fe4!? Re4 30.Bc7 Qc7+–) 29...Qc7 (29...Bd5 30.Bd6+–) 30.fe4 Rh5 (30...Qc5 31.Kh1 Re4 32.Rf7 Rgg4+–) 31.d6! Qd7 (31...Qd6 Theme: Deflection from f7 32.Bf7 Theme: Double Attack) 32.Rf7 (32.Rf7 Qf7 33.Bf7 Kg7 34.Be8+–) 1–0. Zylla,Johannes – Huebscher, BS–Kreismeisterschaft, 1995.

4.d4 a6 5.c4 ab5 6.cb5 c6 7.Nc3 c5 (7...cb5 8.Bb5 Nc7 9.Bd3+=) 8.dc5 (8.d5 Ng5+=) 8...Qa5 (8...Nc5 9.Nf3+=) 9.Bd2+/– Nc5 10.Nd5 Qd8 (11.b6 Ne6+/–). Charlemagne – jaunis111, internet, 2007.

4.d4 c5 5.d5 Ng5 6.h4 Ne4 7.Qf3 Qa5 8.Nd2 f5 (better is 8...Ngf6!? 9.Bd3 Nd6–/+) 9.Qf5+= Ngf6 10.Ngf3 (10.Bd3 Nd6 11.Qe5=) 10...c4?? (better is 10...d6 11.Qf4 Qc3–/+) 11.Bc4+/– Qc3 (11...d6 12.Qf4+/–) 12.Rb1 g6 13.Qe5 Qc2 (13...d6!? 14.Qd4 Bg7+–) 14.Ne4 Qb1? (14...Ne4 15.Qh8 Qb1+–) 15.Nf6 Kd8 16.0–0 ef6 (16...d6 17.Qd4 Bg7+–) 17.Qf6 Kc7 18.Qh8 Kb8 (18...Qb4+–) 19.Qf8 Qc2 20.Qd6 1–0. cagey – ronsteel, Live Game Caissa's Web, 2004.

4.d4 c6 5.a4 Nc7 6.c4 f5 7.Bd3 e6 8.Ba3 Nh6 (8...Ba3 9.Na3 Nf6 10.Nf3+=) 9.h3 (9.Bf8 Kf8 10.Nf3 d6+/–) 9...Qg5 10.Qf3 Be7 11.Be7 Ke7 (11...Qe7 12.Ne2+/–) 12.Ne2 a6 13.b6 Ne8 14.Nbc3 a5 15.0–0 Ra6 (15...d6 16.Rfd1+/–) 16.Rab1 g6 17.e4 Nf6 (17...d6 18.c5 Ra8 19.Rfe1+–) 18.e5 Ne8 19.d5 (19.Nf4 Nf7+–) 19...Qd2? (better is 19...Nf7 20.d6 Kd8+/–) 20.Rfd1 Qa2 (20...Qg5 21.c5 Ra8 22.d6 Kf8+–) 21.Ra1 (better is 21.Na2 Nf7 22.Qe3+–) 21...Qb2 22.Qe3 cd5 (22...Qb6 23.c5 Qb4 24.Qg5 Kf7 25.Ba6+–) 23.Rdb1 Qb4 (23...Qa1 24.Ra1 (24.Qh6?! Qa3+/–) 24...d4 25.Qg5 Kf7 26.Nb5+–) 24.Rb4 (24.Rb4 ab4 25.cd5+–) 1–0. Mynya – Oot, playchess.de, 2005.

4.d4 c6 5.a4 Nc7 6.c4 Nf6 7.f3 (7.Bd3 d5+=) 7...a6 (7...e6 8.Bd3=) 8.Qb3 (8.b6!? Ne6 9.a5+=) 8...ab5=+ 9.cb5 Ncd5 (9...Nb5!? 10.Bb5 cb5 11.Qb5 Ra5=+) 10.e4+= Nc7 11.b6 (11.Nc3 e6+=) 11...Na6 12.a5 e6 13.Bd2 (13.Bg5 h6 14.Be3 d5=) 13...d5 14.e5 Nh5?? (14...Nd7 15.f4=) 15.g3 (better 15.g4!?+–) 15...g6+= 16.Ne2 Be7 17.Ra4 (17.Bh6 Rg8+=) 17...0–0 18.f4 (18.Qe3 Bd7=) 18...Bd7 19.Nec3 (19.Ra2 c5=) 19...c5=+ 20.Nb5 cd4 21.Rd4 Nc5 (better 21...Ng7 22.Bc3 Nf5=+) 22.Qa4?? (better 22.Qa3 Bb5 23.Bb5=) 22...Na4–+ 23.Ra4 Bb5 (23...Bc5!? 24.N1c3 Bc6 25.Bd3–+) 24.Bb5 Ng7 25.0–0 Nf5 Black prepares d4 (25...Bc5 26.Kg2–+) 26.g4 (26.Rc1 Rc8 27.Bd3 Rc1 28.Bc1 Qc8–+) 26...Nh4 (better 26...Bc5 27.Kg2 Ne3 28.Be3 Be3 29.g5–+) 27.g5 (27.Be3 f6 28.ef6 Bf6–+) 27...Bc5 28.Kh1 (28.Rf2–+) 28...d4 29.Rc1 Qd5 30.Kg1 Qg2 0–1. afsharian – Togamo, lichess.org, 2018.

4.d4 c6 5.bc6 bc6 6.Nf3 Rb8 7.Be2 g6 8.c3 Bg7 9.Nbd2 Nf6 10.0–0 0–0 11.Rb1 Rb1 12.Nb1 Bb7 13.Nbd2 Qc7 (13...c5 14.Bc4=) 14.Qc2 (14.c4!?=) 14...c5=+ 15.h3 cd4 16.ed4 Nh5 17.Bb2 (17.Re1 Nhf4 18.Ne4 Rc8–/+) 17...Nd4 18.Nd4 (18.cd4 Qc2) 18...Nf4?? (18...Bd4 19.Bh5 gh5=+) 19.Bf3?? (better is 19.N2f3+/–) 19...Ba6?? (better is 19...Bd4 20.Bb7 Qb7–/+) 20.c4+– Rc8 21.Rc1 Bd4 (21...e5 22.Ne2 Ne2 23.Be2+–) 22.Bd4 d5 (22...Bb7 23.c5+–) 23.c5 (better is 23.Qc3!? f6 24.cd5 Qc3 25.Rc3 Rc3 26.Bc3 Bb7+–) 23...e5 24.Be3 Ne2 (24...e4 25.Qa4 Bd3+–) 25.Be2 Be2 26.Nb3 (26.Ne4!? de4 27.Qe2 f5+–) 26...Bc4 27.Bd2 (27.Qd2 Rd8+–) 27...f5 28.Na5 Qc5 29.Nc4 Qc4?? (29...dc4 30.Bc3+–) 30.Qc4 (better is 30.Qb3 Qc1 31.Bc1 Rc1 32.Kh2+–) 30...Rc4 31.Rc4 dc4 32.Bc3 e4 33.Kf1 Kf7 34.Ke2 Ke6 35.g3 (35...Kd5 36.f4+/–) 1–0. annmarie – jmcd2002, Live Game Caissa's Web, 2004.

4.d4 d5 5.Bb2 c6 6.bc6 bc6 7.Nd2 Ng5 8.c4 e6 9.c5 (9.Qa4 Rb8 10.Rb1 Qc7+=) 9...Be7 (9...Qa5 10.Qc2 Ne4 11.Ngf3=) 10.Ngf3 Nf3 11.Nf3 Nf6 (11...Qa5 12.Qd2 Qd2 13.Kd2+=) 12.Bd3 (12.Qa4 Qc7+=) 12...0–0 (12...Ba6 13.Ne5 Qc7 14.Rb1=) 13.a4 (13.Qa4 Qc7+=) 13...a5 (13...Ba6 14.0–0 Bd3 15.Qd3=) 14.Bc3 (14.Qe2 Nd7+=) 14...h5 (14...Ba6!?+=) 15.Ne5+– Qc7 16.Qd2 (16.Rb1 Bd8+–) 16...Ne4 (16...Nd7 17.Nd7 Bd7 18.Qe2+–) 17.Be4 de4 18.Qc2 f6 (18...f5!?+–) 19.Ng6+– f5 (19...Re8 20.Qe4 Rb8 21.0–0+–) 20.Nf8 Bf8 21.Qb3 Rb8 22.Qa2 Be7 23.Qd2 Ba6 (23...Bd8 24.0–0+–) 24.Ba5 Qb7 25.Bb6 e5 (25...Bf6 26.Rd1+–) 26.a5 (better 26.Qa2!? Kf8 27.de5 Bd8 28.Bd8 Rd8+–) 26...Bf6 27.Qc3 ed4 28.ed4 Bd3 29.Rd1 (29.Ra4 Qd7+–) 29...Ba6 (29...Qd7 30.Qb3 Kh7 31.d5 cd5 32.Rd3 ed3 33.0–0+– (worse 33.Qd3 Re8 34.Kf1 d4+–)) 30.Qb3 (30.Ra1 Qf7+–) 30...Kh7 (30...Qf7 31.Qf7 Kf7 32.h3+–) 31.Qe6 Bd3 (31...Qc8 32.Qc8 Rc8 33.f4+–) 32.Qf5 g6 (32...Kg8+–) 33.Qf6 Qa6 (33...Qd7 34.Rd2 Qd5 35.Qe7 Kh6+–) 34.Qf7 Kh6 35.Bc7 (35.Bc7 Rb7 36.Ra1+–) 1–0. alessandrocarvalhaes (1890) – CEBOUS (1895), lichess.org, 2020.

4.d4 d5 5.f4 f5 (5...Nf6!?=) 6.c4+= dc4 (6...Nf6 7.cd5 Nd5 8.Nf3+=) 7.Bc4+– c6 (7...Nf6!?+–) 8.Qb3 Bd7? (better 8...Qd7+–) 9.Be6 Be6 10.Qe6 g6 (10...Qd5 11.Qd5 cd5 12.Ba3+–) 11.a4 (11.bc6 Rc8 12.Qb3 Rc6+–) 11...Bg7 (11...Qd6 12.Qc4+–) 12.bc6 (better 12.Nc3 c5 13.Nf3 cd4+–) 12...bc6 (12...Rc8 13.Ne2 Rc6+–) 13.Qc6 Kf8 14.Nf3 (better 14.Ne2+–) 14...Rc8+= 15.Qb7 (15.Qc3 Rc3 16.Nc3 Ke8+=) 15...Rc1= 16.Kd2 (better 16.Kf2!? Rh1 17.Ng5 Bd4 18.Ne6 Ke8 19.Nd8 Ba1 20.Nc6+=) 16...Rh1–/+ 17.Qa7?? (17.Ng5 Qa5 18.Nc3 Bd4 19.Qc8 Kg7 20.Rh1–+) 17...Nf6 (better 17...Qc8 18.Kd3 Bf6–+) 18.Ne5 (18.Qb7 Ne4 19.Ke2 Bf6–+) 18...Nd5 (better 18...Ne4 19.Kc2 Be5 20.fe5 Qc8 21.Kb3–+) 19.Nd7 (19.Nc6 Qd6 20.Qb8 Qb8 21.Nb8 Kf7–+) 19...Kf7 20.Nc5 (20.a5 Qc8 21.Nc5 Rh2 22.Nc3 Nf4 23.Ne2 Rg2 24.Re1–+) 20...Qd6 21.Qd7 (21.Nd3 Rb8 22.h4 Rhb1 23.Rb1 Rb1–+) 21...Qd7 (better 21...Rb8!? 22.Qd6 Rb2 23.Kd3 ed6 24.Nb3 Rb3 25.Kc4 Rbb1 26.Rb1 Ne3 27.Kd3 Rb1 28.Ke3 Rb3 29.Ke2 Bd4 30.h3–+) 22.Nd7 Rc8 23.Nc5 (23.Nc3 Ra1 24.Nd5 Ra4–+) 23...e5 (better 23...Rc5 24.dc5 Ba1 25.Na3 Rh2 26.Kd3 Rg2 27.Nc2–+) 24.fe5 Nf6! 25.e6?? (25.ef6 Bf6 Combination) 25...Ke7–+ 26.a5 (26.Kd3 Rc5! 27.dc5 Ke6–+) 26...Nd5 (better 26...Rc5 27.Ra2 Ne4 28.Kd3 Rd1 29.Nd2–+) 27.a6 (27.Nc3 Ra1 28.Nd5 Kd6–+) 27...Nb4 (27...Rc5!? 28.a7 Nc7 29.a8Q Na8 30.Ra8–+) 28.a7 (28.Ke2 f4 29.a7 A) 29...Rh2 30.a8Q Ra8 31.Ra8 fe3 32.Ra7 Kf8 33.Rf7 (33.Ke3 Bd4 34.Kd4 Nc6 35.Kd5 Na7–+) 33...Kg8 34.Rd7 Bd4 35.Rd8 (35.Rd4?! Rg2 36.Kf3 Rf2 37.Kg3 Nc6+–) 35...Kg7 36.Rd4 Rg2 37.Kf3 (37.Ke3?! Nc2 38.Kf3 Nd4 39.Kg2 Ne6+=) 37...Rf2 38.Kg3+– (38.Ke3?! Nc2 39.Kf2 Nd4+–); B) 29...Ra8–+) 28...Ra8 (28...Rh2?! 29.a8Q Ra8 30.Ra8 Rg2 31.Kc3 Nd5 32.Kd3=) 29.Kc3 (29.Nd7 Nd5–+ (29...Ke6?! 30.Nb6 Re8 31.a8Q Ra8 32.Na8–/+)) 29...Nc6 (better 29...Nd5 30.Kb2 Ne3–+ (worse 30...Rh2 31.Nc3 Rg2 32.Kb3 Ne3 33.Nb5–+)) 30.Kb2 (30.Ra6 Rb1 31.Rc6 Ra7–+) 30...Na7 (30...Nd4 31.ed4 Bd4 32.Nc3 Bc3 33.Kc3 Ra1 34.Nb3 R1a7 35.Nd4 Rc8 36.Kd3–+) 31.Nc3 (31.h3 Rg1 32.g4 f4–+) 31...Ra1 32.Nd5 (32.Ka1 Nb5 33.Kb2 Nc3 34.Kc3–+) 32...Kd6 33.Ka1 (33.Nb6 Nc6 34.Na8 Ra8–+) 33...Nc8 34.Kb2 Kd5 35.e4 (35.Kc3 Bh6 36.Nb3 Be3–+) 35...Kc4 (35...Kd4 36.Nd7 fe4 37.e7 Ne7 38.Kb3–+) 36.Nb3 (36.e5 Kd4 37.e7 Ne7 (37...Kc5?! 38.e8Q–/+) 38.Ne6 Ke5 39.Ng7 f4–+) 36...Nd6 (better 36...fe4 37.Nc1–+) 37.e5 Ne4 38.e7 Rb8 (better 38...Nc3!? 39.Nc1 Kd4 40.e6–+) 39.Kc2 Rc8 (better 39...Bh6–+) 40.Kb1 (40.h3–+) 40...Rb8 (40...Kb3 41.h3 Nc3 42.Ka1 Ra8) 41.Kc2–+ Rc8 (41...Rb3?! 42.e8Q Rc3 43.Kb1–/+) 42.Kb1 Rb8 (42...Kb3 43.h3 Nc3 44.Ka1 Ra8) 43.Kc2= ½–½. afsharian – uccchess, lichess.org, 2018.

4.d4 g6 5.Nf3 Bg7 6.c3 (6.e4 c5=) 6...a6 (6...Nf6 7.Bd3=) 7.ba6 (7.e4 ab5 8.Bb5 c6=) 7...b6 8.Nbd2 (8.Qa4 Nf6=) 8...Ba6= 9.Ba6 Ra6 10.Bb2 (10.e4 Qa8=) 10...Nf6 11.Qe2 (11.c4 Qa8=) 11...Qa8 12.a3 0–0 13.c4 Ne4 (13...Rd8 14.0–0=) 14.0–0 Nd2 (14...Rd8 15.Rab1=) 15.Qd2 Qe4 16.Rfd1 (16.Qb4 d6=) 16...Rfa8 17.Ne1 (17.d5 Nc5 18.Bg7 Kg7 19.Qb2 Kg8=) 17...Ra4 18.Rdc1 (18.Rac1 h6=) 18...Nd8 (18...h6 19.Qd3 Qd3 20.Nd3=) 19.f3 (19.Qd3 Qd3 20.Nd3 h6=) 19...Qf5 (19...Qe6 20.Nd3=) 20.e4 (20.Rab1 Nc6 21.Qd3 Qg5=) 20...Qa5 21.Qe2 (21.Qa5 R8a5 22.Rc2 d6=+) 21...Ne6=+ 22.Rd1 (22.e5 d5 23.cd5 Qd5=+) 22...b5 (22...c5 23.Nc2–/+) 23.Rac1 (23.cb5 Nd4 24.Qf2 Qb6–/+) 23...bc4–/+ 24.Rc4 (24.Qf2 c5 25.Bc3 Qb5 26.dc5 Ra3 (26...Nc5?! 27.Rb1 Qc6 28.Bb4–/+; 26...Qc5?! 27.Qc5 Nc5 28.Bb4=) 27.Bg7 Kg7–+) 24...Rb8 25.Ra4 (25.Rcc1 Nd4 26.Bd4 Bd4 27.Kh1 d6–+) 25...Qa4–+ 26.Rd3? (better 26.Ba1 Nd4 27.Qd3–+) 26…Nf4 (26...Nf4 27.Qf2 Nd3 28.Nd3 Qd1 29.Qf1 Qc2–+; 26...Bd4?! 27.Bd4 Nd4 28.Qd1 Qd1 29.Rd1–/+; worse 26...Nd4 27.Bd4 Bd4 28.Kf1–+) 0–1. mgilbert – pcmvr, net–chess.com, 2017.

4.Nf3 a6 5.ba6+= ba6 6.Nc3+/– Bb7 (6...Rb8 7.Ba3+/–) 7.Rb1 (7.Ba3 Nf6 8.Rb1 Rb8+/–) 7...Rb8 8.Ba3 d6 (8...Nf6 9.Rb3 Bc6 10.Bc4+/–) 9.Rb3+– Qc8 (9...Ba8 10.Ba6 g6 11.d4+/–) 10.Qb1 Nc5?? (better is 10...a5+–) 11.Bc5 dc5 12.Ba6! c4 (12...Ba6 13.Rb8 Pinning (13.Rb8 Deflection)) 13.Rb7 Rb7 14.Bb7 Qe6 15.Qb5 Kd8 16.Qa5 Qb6 17.Qa8 Kd7 18.Qc8 Kd6 19.Ne4 1–0. wiking – cgong, internet, 2010.

4.Nf3 a6 5.ba6 ba6 6.Be2 Bb7 7.0–0 h6 8.c4 Ng5 9.Ne5 d6 10.Qa4 c6 11.Nf3 (11.Nc6? Qd7–+) 11...Qd7 12.c5 d5 (12...Nf6!?=) 13.Ne5+– Qc7 14.f4 Ne4 15.Bh5 (15.d4 Ngf6+=) 15...g6= 16.Ng6 fg6 17.Bg6 Kd8 18.Bb2 Ngf6? (better 18...Nef6+=) 19.Be5+– Qd7 (19...Qc8 20.Qa5 Kd7 21.Bf5 e6 22.Be4 Ne4 23.Bh8 Bc5+–) 20.Qa5 Kc8 21.Bf5!! e6 (21...Qf5 22.Qc7) 22.Be6! Qe6 (22...Qe6 23.Qc7) 23.Qc7 1–0. GuestSXJB – GuestBJKB, freechess.org, 2018.

4.Nf3 a6 5.ba6 b6 6.a4 (6.d4 g6+=) 6...c6 (6...Ba6 7.Ba6 Ra6 8.d4=) 7.Bb2 (7.e4 Ba6 8.Ba6 Ra6=) 7...Nf6 (7...Ba6 8.Ba6 Ra6 9.0–0=) 8.Na3 (8.Be2 Ba6 9.0–0 Be2 10.Qe2 d5=) 8...g6 (8...Ba6 9.Ba6 Ra6 10.Nc4=) 9.a5+= b5 (9...ba5 10.Nc4=) 10.Nd4 (10.c4 b4 11.Nc2 c5+=) 10...Ba6= 11.Ne6 fe6 12.Bd4 d6 (12...Bg7 13.c4 bc4 14.Nc4 Bc4 15.Bb6+= (worse 15.Bc4 Ra5 16.Rb1 c5=+)) 13.Qb1 (13.c4 b4 14.Bb6 Qc8=) 13...Qb8 (13...Bg7 14.Bb6 Qd7 15.c4 bc4 16.Bc4=) 14.Qb3 (14.Be2 e5 15.Bc3 Bg7=) 14...Bc8 (14...Bg7 15.Be2+=) 15.g3 (15.c4!? b4 16.Nc2=) 15...Ra5=+ 16.Bg2 c5 Black plans b4 17.Bc6 Bd7 18.Bd7 Kd7 19.Bc3 b4 20.Nc4 Ra1 21.Ba1 Qb5 (21...Qb7 22.0–0=+) 22.Qd3 Kc7 (22...Qb7 23.0–0 Bg7 24.e4=+) 23.e4= Rg8 24.Bf6 (24.Bb2 d5 25.Bf6 Qc4 26.Be5 Kc6 27.Qc4 dc4=+) 24...ef6=+ 25.0–0 Qa4 (25...Qa6 26.c3=) 26.Rc1 (26.f3 Qa7=+) 26...Rg7 27.Ne3 (27.Qf3 f5=) 27...Kd8=+ 28.Qc4 Re7 29.c3 (29.d4 Qa7 30.Rd1 cd4 31.Rd4 Rb7=+) 29...Ke8 (29...Bh6!?=+) 30.Rb1= Kf7 31.f4 f5 (31...Qa5 32.cb4 cb4 33.Rb4=) 32.ef5+= gf5 33.cb4 Rb7 (33...cb4 34.Rb4 Qa1 35.Kg2 Qa8 36.Kh3=) 34.b5 Qc4 35.Nc4 Ke8 (35...d5 36.Ne5 Ke7 37.Kf2=) 36.Na5 (36.b6 d5 37.Na5 Rb8=) 36...Rb6= 37.Kf2 d5 38.Nc6 Kd7 (38...c4 39.Ke3=) 39.Ke3 (39.d3 Bg7=) 39...Kc7 (39...Bg7 40.h3=) 40.Ne5 (40.d3 Bg7=) 40...Bg7 41.Nc6 (41.h3 Kd6 42.d4 c4=) 41...c4 42.d3 (42.Ne5 Rb7 43.d3 Be5 44.fe5 Kb6–/+) 42...Kd6 43.d4 Bf6 44.Kd2 h5 45.Kc3 h4 (45...Rb7 46.Rb2=) 46.Kb4 (46.gh4 Bh4 47.Ne5 Rb7=) 46...hg3 (46...Rc6 47.bc6 Bd4 48.Kb5=) 47.hg3 Rb7 48.Ra1 Rb6 49.Ne5 Kc7 ½–½. pierred – pcmvr, net–chess.com, 2017.

4.Nf3 a6 5.ba6+= Nf6 6.Nc3+=.

4.Nf3 b6 5.a4 Bb7 (5...a6 6.Bb2+=) 6.a5 (6.Be2 a6+=) 6...ba5= 7.d4 (7.Bb2 a6 8.ba6 Ba6 9.Ra5 Bf1 10.Ra8 Qa8 11.Rf1 Qb7=) 7...d5 (7...a6!?=) 8.Nbd2 (8.Ne5 Nf6+=) 8...c6 (8...a6 9.Ne5 ab5 10.Qh5=) 9.Ne5+– c5 10.b6 a6 (10...ab6 11.Bb5 Decoy; 10...Qb6 11.Rb1 Decoy) 11.c4+– Qb6?? (better 11...Nf6 12.cd5 Qd5 13.Ra5 Nd7 14.Nd7 Qd7+–) 12.Qa4+– (12.Qa4 Bc6 13.Nc6+–) 1–0. pcmvr – mic, net–chess.com, 2017.

4.Nf3 b6 5.c4 Nf6 6.Nc3 g6 7.Bb2 Bg7 8.Be2 Bb7 9.d4 d5 (9...0–0 10.0–0=) 10.cd5 Nd5 11.Nd5 Bd5 12.a4 (12.0–0 0–0+=) 12...Qd6 13.0–0 Qb4? (13...0–0!?=) 14.Ba3+– Qb3 (14...Qc3 15.Qb1+–) 15.Qb3 (better 15.Qc1!? Rc8 16.a5 ba5 17.Nd2+–) 15...Bb3+= 16.Nd2 Bd5 (16...Ba4?? 17.Bb2 Bc2 18.Rfc1+–) 17.e4 (better 17.Nc4+=) 17...Nd4–/+ 18.Bd3 Be6 19.Rac1 (19.Rad1–/+) 19...Be5 (19...0–0–0!? 20.Bb2 Rhg8–+) 20.Nc4 (20.f4 Bd6 21.Bd6 cd6=+) 20...Bf4–/+ 21.Rc3 Bg4 (21...Rd8 22.Rb1–/+) 22.Ne3 Be2 23.Re1 Bd3 24.Rd3 Be5 (24...Be3 25.fe3 Ne6 26.Red1–/+) 25.Nd5 (25.f4 Bf6 26.Kf1 Ne6+–) 25...e6 (25...Nc2 26.Rc1 Na3 27.Ra3=+) 26.Nb4 (26.Bb2 ed5 27.ed5 Kd7 28.Re5 Nf5=) 26...h6 (26...0–0–0 27.Bb2=+) 27.Red1 (better 27.f4 Bg7 28.Nc6 Nc6 29.bc6+=) 27...Bg7?? (better 27...0–0–0 28.Bb2 Ne2 29.Kf1 Rd3 30.Rd3 Bb2 31.Ke2 f5=) 28.Rd4+– Bd4 29.Rd4 0–0 (29...Rd8!? 30.Rd8 Kd8 31.Nc6 Kc8+–) 30.Nc6+– Rfe8 31.h3 a6 32.Bb4 h5 (32...ab5!? 33.ab5 Ra1 34.Kh2 Rea8+–) 33.g3 ab5 34.ab5 Ra1 35.Kg2 Rea8 36.Rd8?? (better 36.Rd7 Rb1 37.Rc7+–) 36...Rd8= 37.Nd8 Rb1 38.Nc6 Kg7 39.h4 Kf6? (39...Rb3 40.Kf1=) 40.e5?? (better 40.Bc3 e5 41.Be5 Ke6 42.Kf3+–) 40...Kf5= 41.Be7 (better 41.f3 g5 42.hg5 Rb2 43.Kh3 Kg5 44.Be7 Kg6 45.Nd4=) 41...Rb5?? (better 41...Ke4=+) 42.Nd4+– Ke5 43.Nb5 c5 44.Bd8 Kd5 45.Kf3 (45.Bb6?! Kc6 46.Bc5 Kc5+–) 45...c4 (45...Kc6 46.Na3 b5+–) 46.Bb6 Kc6 47.Bd4 (better 47.Na3!? Kb6 48.Nc4 Kc7+–) 47...Kb5 48.Ke4 Kb4 49.f3 (better 49.Ke5 f5+–) 49...Kb3 50.g4?? (better 50.Ke5 c3 51.Kf6+–) 50...hg4+= 51.fg4 f5 52.gf5 ef5 53.Kf4 c3?? (53...Kc2+–) 54.Bc3 (better 54.Kg5+–) 54...Kc3= 55.h5 gh5 56.Kf5 ½–½. Darkseid (1815) – Emym Ibwy (1765), ChessWorld.net, 2009.

4.Nf3 b6 5.d4 d5 (5...g6 6.Nc3=) 6.Bd3 (6.c4 Nf6+=) 6...Bb7 7.Nbd2 (7.c4 Nf6+=) 7...h6 (7...g6!?+=) 8.0–0 Qd6? (8...Nf6!?+–) 9.c4 (better 9.a4+–) 9...0–0–0?? (better 9...Nf6+–) 10.Qa4 (10.Ne5 Ng5 11.f4 f6+–) 10...Kb8 (10...dc4 11.Ba3 Qd7 12.Nc4+–) 11.Ba3 Qd7 12.Ne5 Qe8 13.Nc6 Bc6 14.bc6 Rd6 (14...dc4 15.Nc4 Nf6+–) 15.Bd6 ed6 (15...cd6 16.Rab1 Qc8 17.cd5+–) 16.cd5 Ng5 (16...Nd8 17.Rfb1 Ne7 18.Qb5 Nd5 19.Qd5 Qc6 20.Qf5+–) 17.h4 (17.Bf5 a5 18.Rab1 Qc8 19.Bc8 Kc8 20.Rb6 Kd8 21.Rb8 Ke7 22.Qa5 Kf6 23.Rf8 Nh7+–) 17...Qc8 (17...Nh7 18.Bf5 a5 19.Rab1+–) 18.hg5 hg5 19.Ne4 g4 (19...Be7 20.Rab1 Nf6 21.Rb3+–) 20.Ng5 Qd8 (20...Nh6+–) 21.Nf7 Qh4 22.Nh8 Qh8 23.Qa6 (23.Qa6 Qh2 24.Kh2 g3 25.Kg3 Nf6 26.Qb7) 1–0. GuestTRFZ – salafy, freechess.org, 2020.

4.Nf3 b6 5.Be2 d5 (5...a6 6.Bb2+=) 6.0–0 Bb7 7.Bb2 Qd6 (7...a6 8.Ne5 Nf6 9.ba6 Ba6 10.Ba6 Ra6 11.Qe2+=) 8.c4 dc4 9.Bc4 0–0–0 (9...Qb4 10.Qc2+/–) 10.d4 (10.Ne5 Nh6+–) 10...Qb4+/– 11.Qb3 Qd6?? (11...Qb3 12.Bb3 Bf3 13.gf3+/–) 12.Nc3 (better is 12.Ne5!? Ng5 13.f4 Nh3 14.gh3 Nh6+–) 12...c5? (better is 12...Bf3 13.gf3 Ng5 14.Bf7 Nf6+/–) 13.bc6!+– Bc6 14.Ba6 Bb7 15.Qc4 Qc7 16.Bb7 Kb7 17.Qb5 Qd7 18.Ne5 Qb5+= 19.Nb5 Nh6 20.Rfc1 f6 21.Nc6+/– Ra8 22.a4 Nd8? 23.d5 e6 24.d6?? Nc6–+ 25.d7 Bb4 26.Rd1 Nf7 27.Ba3 Ba3 28.Ra3 Rhd8 29.Rad3 a6 30.Nd6 Nd6 31.Rd6 Ne5 32.Kf1 Kc7 33.Re6 Rd7 (34.Rc1 Kb7–+) 0–1. gtate (2005) – jcekota (2125), net–chess.com, 2004.

4.Nf3 c5 5.Bb2 Nf6 6.h4 (6.Be2 d5+=) 6...Nc7 7.c4 e6 8.Nc3 d5 9.d4 dc4 10.dc5 Qd1 11.Rd1 Bc5 12.Bc4 Bb4 13.0–0 Ke7 14.a3 Ba5 15.a4 Bb4 16.e4 Rd8 17.Rd8 Kd8 18.Rc1 Nce8 19.e5 Nd7 20.Na2 Bc5 21.Ng5 Ke7 22.Be2 h6 23.Ne4 b6 (23...Bb6 24.Bh5 g6 25.Bf3+/–) 24.Nc5 bc5 25.Bf3 Rb8 26.Ba3 a6 (26...Bb7!? 27.Bb7 Rb7 28.Bc5 Nc5 29.Rc5 Nc7+–) 27.Bc5 Nc5 28.Rc5 ab5 29.Nb4 (29.Rb5 Rb5 30.ab5 Nc7+–) 29...Bd7 30.a5 Kd8? (better is 30...Rc8 31.Rc8 Bc8+–) 31.a6 Nc7 32.a7 Rc8 (32...Ra8 33.Rc7 Kc7 34.Ba8 Kb6+–) 33.Na6!! Na8 (33...Na6 34.Bb7 Double attack (34.Bb7 Decoy)) 34.Rc8 (34.Rc8 Bc8 35.Ba8 Ba6 36.Bf3+–) 1–0. marekt – jilatitil, ChessWorld.net, 2015.

4.Nf3 g6 5.Bb2 Nf6 6.c4 (6.Nc3 Bg7=) 6...Bg7 (6...a6 7.Nc3=) 7.d4 (7.Nc3 0–0=) 7...a6 8.a4 0–0 (8...ab5 9.ab5 Ra1 10.Ba1=) 9.Nc3 b6 (9...d6 10.h3=) 10.Be2 ab5 (10...Bb7 11.0–0=) 11.ab5+= Ra1 (11...Bb7 12.0–0+=) 12.Qa1 Bb7 13.0–0 c6 (13...Qa8 14.Na4+=) 14.Ne5 (14.bc6 dc6 (14...Bc6?? 15.d5+–) 15.Qa3 Qc7+–) 14...Qc7 (14...cb5 15.Qa7 Qa8 16.Qa8 Ra8 17.cb5+=) 15.bc6 dc6 16.f4 Nd7 (16...Ra8 17.Qd1+=) 17.Qa3 (17.d5 A) worse 17...Ne5 18.de6 (worse 18.fe5 Ra8 19.Qb1 Nc5=+) 18...Ra8 19.Na4 fe6 20.Be5 Be5 21.fe5+–; B) 17...Ra8 18.Qb1 B1) 18...Ne5? 19.de6 (worse 19.fe5 Nc5=+) 19...Bc8 20.fe5 Be6 21.Ne4+–; B2) 18...cd5 19.Nd5 Bd5 20.cd5 Nec5+=) 17...Ne5 18.fe5 (worse 18.de5 Nc5=) 18...f6 (18...Rb8 19.Qb3+=) 19.Qb3 (19.c5 b5 20.Ne4 Bc8+– (20...fe5 21.Qa2 Rf1 22.Kf1+–)) 19...Rb8+= (19...fe5? 20.c5 Bc8 21.cb6+–) 20.ef6 ef6 21.Nd5 (21.Ba3 Re8+–) 21...Qd8 22.Nf4 (worse 22.Qb6 Ba8 23.Qd8 Nd8 24.Nf6 Bf6 25.Rf6 Rb2=+) 22...Nf4 23.ef4 (23.Rf4 f5+=) 23...f5+= 24.Rd1 Qc7 (24...Qe7 25.c5 Kh8 26.Bf3+=) 25.c5 Kh8 26.cb6 Qf4 27.g3 (27.Qa3 Re8 28.Bf1 Qe4+=) 27...Qd6 28.Qa3 (28.Ba3 c5 (28...Bd4?? 29.Rd4 Qd4 30.Kf1 Qa1 31.Kg2 c5 32.Kh3+–) 29.d5 Ra8+=) 28...Qd8= 29.Qa7 h6 (29...Qc8 30.Qa4=) 30.Bf3 (30.Bc3 Qc8 31.Qa2 c5+=) 30...Qc8 31.Qa3 Qe8 (31...Qd8 32.Qb4 Kh7 33.d5=) 32.Qd6 Exerts pressure on the isolated pawn (32.Kg2!?+=) 32...c5= 33.Bb7 Rb7 34.dc5 (34.Qc5 Qe3 35.Kg2 Qe2 36.Kh3 Re7 37.Qe7 Qe7–+) 34...Qe3 35.Kf1 ½–½. Bartsch,Christian (1750) – Parra,Christian (2150), IECG, 2000.

4.Nf3 g6 5.d4 c5 6.d5 Bg7 7.c3 Nc7 8.d6 ed6 (8...Ne6 9.Bc4+=) 9.Qd6 Nb5? 10.Bb5+– Qa5? (10...a6 11.Bd3 Qe7 12.Qe7 Ne7+–) 11.Qc5 a6 (11...Qd8+–) 12.Bd7! (12...Bd7 13.Qa5+–) 1–0. guest – torito, internet, 2007.

4.Nf3 h5 5.Bb2 Nf6 6.Be2 h4 7.h3 g5 8.Bf6 ef6 9.0–0 (9.d4 f5+=) 9...f5= 10.Nd4 Nd4 11.ed4 Bg7 (11...d5 12.Re1=) 12.c3 f4 (12...d5 13.a4=) 13.Bd3 0–0 14.Re1 Re8 15.Re8 Qe8 16.Qf3 Qe1 17.Kh2 c6 18.a4 d5 19.a5 (19.Bc2 Bd7 20.Bd3 Re8 21.bc6 bc6–/+) 19...Bd7 20.a6 b6 21.bc6 Bc6 22.Ra2 Re8 23.Na3 Ba8 24.Nb5 Re7 25.Nd6 Bf6 26.Nf5 Re8 (26...Rc7 27.Rc2+=) 27.Nh6 (27.Qh5 Qe6+–) 27...Kf8+/– 28.Qh5 Qe6 29.Bf5 (29.Nf5!? Rc8 30.Qh6 Ke8 31.Ng7 Bg7 32.Qg7+–) 29...Qe7+= 30.Ng4 Bg7 31.Bd3 f3 32.gf3 Bc6 33.f4 gf4 34.Ne5 Ba8? (34...Be5 35.de5) 35.Bb5+– Rd8 36.Nf3 Rd6 37.Qh4 Qh4 38.Nh4 Re6 39.Nf5 Re2?? (better is 39...Rf6 40.Ra1 Bc6 41.Bc6 Rc6+–) 40.Be2 (40...Bc6 41.Bf3+–) 1–0. market (2180) – MG (2040), GameColony.com, 2002.

4.Bb2 a6

5.a4 a5 6.Nf3 d5 7.c4 dc4 (7...Nf6 8.cd5 Qd5 9.Nc3+=) 8.Bc4 c6 (8...Nf6 9.0–0+/–) 9.Ne5 (better is 9.bc6 bc6 10.Ne5+/–) 9...Ng5?? (9...Qb6!?+/–) 10.f4 (better is 10.Qh5 e6 11.f4+–) 10...Ne4?? (better is 10...f6+/–) 11.Bf7 1–0. Istvanny (1605) – jaunis111, internet, 2007.

5.a4 a5 6.Nf3 f6 7.Be2 b6 8.0–0 Nc5 +/–.

5.a4 a5 6.Nf3 f6 7.Be2 b6 8.0–0 g5?? 9.Ne5!+– d6 (9...fe5 10.Bh5 Mate attack) 10.Bh5 1–0. Valpa – Footyhead, playchess.de, 2004.

5.a4 a5 6.Nf3 f6 7.Be2 b6 8.0–0 Nh6 9.c4 c6 10.d3 g5 11.Nfd2 c5 12.d4 d6 13.dc5 dc5 14.Bh5 Kd7?? (14...Nf7 15.Nc3+/–) 15.Ne4 (better is 15.Qf3 Kc7 16.Qa8+–) 15...Kc7 16.Qd8 Kd8? (16...Nd8 17.Ng5! Bb7 18.Bf3+–) 17.Be2?? (better is 17.Nf6 Bg7 18.Rd1 Kc7 19.Nd5 Kb7 20.Nbc3+–) 17...Bg7 18.Ra2 (18.Nbc3 f5 19.Rad1 Bd7+/–) 18...f5? (better is 18...Bb7!? 19.Rd1 Kc8+=) 19.Bg7+– Ng7 20.Ng5 Ne6 21.Ne6 Be6 22.Rd2 Ke8 23.Bf3 Rd8 24.Bh5 Bf7 25.Bf7 Nf7 26.Rd8 Nd8 27.Nc3 e6 28.e4 f4 29.f3 h5 30.Rd1 h4? (30...Nf7 31.Ne2 e5 32.Nc3+/–) 31.h3?? (better is 31.Rd6+–) 31...Nf7 32.Ne2 e5 33.Nc3 Rh6 34.Nd5 Rd6 ½–½. Valpa – Footyhead, playchess.de, 2004.

5.a4 c6 6.Nf3+= cb5 (6...Nf6 7.Be2+=) 7.ab5 Qb6 (7...Nf6 8.Be2+=) 8.c4 Nc5 (8...Nf6 9.Be2+–) 9.d4 Ne4 10.Nc3 Nc3 11.Bc3 Nf6 12.c5 Qd8?? (better 12...Qe6+–) 13.Ba5+– b6 14.Bb6 (14.Bb6 Qb6 15.cb6+–) 1–0. GuestCGQT – GuestLWCD, freechess.org, 2018.

5.c4 ab5 6.cb5 c6 7.bc6 bc6 8.Nf3+= Nf6 9.Bc4 (9.Be2 Rb8 10.Bc3 Nd5+=) 9...d5 10.Bb3 (10.Be2 g6+=) 10...Rb8 (10...Nc5 11.Bc2=) 11.0–0 (11.Qc2 Rb6+=) 11...g5 (11...Ba6 12.Ne5 Bf1 13.Nc6+–) 12.Ne5 Bg7?? (better 12...Rb6+–) 13.Nc6+– Qd6 14.Nb8 Qb8 15.Bd5 (15.Bf6 Bf6 16.d4 Qd6+–) 15...Ng4?? (better 15...Qb2 16.Be6 Be6 17.Qa4 Nd7 18.Qa8 Nb8=) 16.Bg7?? (better 16.Qg4 Bb2 17.Nc3 Ba1 18.Ra1+–) 16…Qh2 0–1. alt20 – thanos_home, lichess.org, 2016.

5.c4 ab5 6.cb5 Nf6 7.Bf6 (7.d4 d5=) 7...ef6 8.Nc3 (8.Nf3 d5=) 8...g6 (8...d5 9.Nf3=+) 9.Nf3 (9.Bc4 c6=) 9...Bg7 (9...d5 10.Be2=) 10.d4 (10.Bc4 c6+=) 10...0–0 (10...Ra3 11.Rc1+=) 11.Bc4 d6 12.0–0 c6 (12...Ra3 13.Qc1 Ra8 14.a4+/–) 13.a4 (13.bc6 bc6 14.d5 cd5 15.Bd5 Ra5+/–) 13...f5 14.Re1 (14.bc6 bc6 15.Rc1 d5=) 14...Nc5 (14...f4 15.bc6 fe3 16.Re3 bc6 17.d5 cd5 18.Bd5=) 15.Ne2 (15.Qc2 Be6 16.Be6 Ne6 17.bc6 bc6+=) 15...Ne4 16.Qc2 (16.Nf4+=) 16...Be6 (16...d5 17.Bd3 c5 18.dc5 Ba1 19.Ra1+=) 17.Bd3 (17.Be6 fe6 18.bc6 bc6 19.Qc6 Rc8+/–) 17...Bd5 (17...Qd7 18.bc6 Qc6 19.Qc6 bc6 20.Be4 fe4 21.Ng5+=) 18.Nd2 (better is 18.Nf4!?+/–) 18...Nd2= 19.Qd2 Qg5 (better is 19...c5=) 20.Ng3 (20.Nf4!?+=) 20...Rfe8 21.Qc2 h5 22.f4 Qg4 23.Qf2 Qh4 24.Re2 Re6 25.a5 Qe7 26.bc6 bc6 27.Nf1 c5 28.Nd2? cd4–+ 29.Rae1?? de3 (30.Re3 Bd4–+ (30...Ra5?! 31.Re6 fe6 32.Nc4–+); 29...Ra5?! 30.e4 fe4 31.Ne4–+) 0–1. coloplayah (1980) – gmiller (1965), net–chess.com, 2006.

5.a4 ab5

6.cb5 b6 7.a4 Nc5 8.d4 Ne6 (8...Ne4 9.Bd3 Bb7 10.Nf3+=) 9.Bc4 Bb7 10.Nf3 Nf6 11.0–0 h5 (11...g6 12.Ne5+=) 12.Nbd2 h4 13.h3 Ne4 14.d5 (14.Ne5 Nd2 15.Qd2 d6+–) 14...Nd2 15.Qd2 (15.de6? Nc4 16.Qb3 Nd6–+) 15...Nc5 16.Ng5 (16.a5 ba5 17.Ra5 Ra5 18.Qa5 e6+–) 16...f6 (16...e6!? 17.Nf3 Na4=) 17.Nf3 (17.Qc2 Rh6 18.Nh7 e5 19.Nf8 Kf8+–) 17...d6 (better 17...e6+–) 18.Qd3?? (18.a5 ba5 19.Ra5 Ra5 20.Qa5 Qc8+–) 18...Qd7 (better 18...Nd3 19.Bd3 Bd5–+) 19.Qg6+– Kd8 20.Bd4 (20.Nd4 Qe8 21.Qc2 g5+–) 20...Rh6 21.Qc2 e6 22.Bc5 (better 22.de6 Ne6 23.Rac1 Bf3 24.Be6 Qe6 A) 25.gf3?! Qd7+= (25...Qh3? 26.Qc7 Ke8 27.Qc6 Kf7 28.Qd5 Kg6 29.Qa8+–); B) 25.Qc7 Ke8 26.gf3 Ra4 27.Kh2+–) 22...dc5? (better 22...ed5 23.Bd6 Bd6+–) 23.de6+– Qe7 (23...Qe8 24.e4+–) 24.Rad1 (24.Rfd1 Kc8+–) 24...Kc8 25.Qf5 (better 25.e4+–) 25...Ra5?? (25...Kb8 26.Bd5 Bd5 27.Rd5+–) 26.Bd5 (26.Rd7 Kb8 27.Re7 Be7+–) 26...Kb8 (26...Bd5 27.Rd5 g6+–) 27.Bb7 Kb7 28.Qe4 Kb8 (28...Kc8 29.Rd7 Qd6 30.Rd6 Bd6 31.e7 Be7 32.Qe7+–) 29.Rd7 Qe8 30.Rfd1 (better 30.e7 Be7 31.Re7 Qd8+–) 30...Bd6 (30...Be7 31.Qc6 Qc8 32.Re7 Rh8+–) 31.Qc6 (31.R1d6 Qc8 32.Rd8 Rh8 33.Rc8 Rc8+–) 31...Ra7 (31...Qe6 32.R1d6 Qd6 33.Rd6 Rh8+–) 32.Rg7 (better 32.R1d6 Rh8 33.e7+–) 32...f5 (32...Qc6 33.bc6 Rh8+–) 33.Qe8 Kb7 34.e7 (34.Qc6 Kb8 35.Rg8 Bf8 36.Rf8) 34...Re6 (34...Rg6 35.Qc6 Kb8 36.e8Q) 35.Qc6 Kb8 36.Rg8 1–0. alt20 – nunutsu, lichess.org, 2016.

6.ab5 Ra1

7.Ba1 b6 8.Qf3 d5 (8...Nf6 9.Bf6 ef6 10.Bc4+=) 9.d4 (9.Nh3 Nc5+=) 9...Bb7 (9...Ng5 10.Qf4 e6 11.Nf3=) 10.Bd3 (10.Nh3 Qa8 11.Bc3 Qa2+=) 10...Ng5= 11.Qe2 Qa8 (11...e6 12.Bb2=) 12.Bc3 (12.Bb2 Nf6=) 12...Nf6 (12...e5 A) worse is 13.de5 d4 14.h4 Bg2 (worse is 14...dc3 15.hg5 Bg2 16.Rh7 Rh7 17.Bh7+/–) 15.hg5 Bh1 (15...dc3 16.Rh7 Rh7 17.Bh7+/–) 16.ed4 Qg2–/+; B) 13.h4+=) 13.Nf3 Nge4 14.Be4 (14.0–0 e6+=) 14...Ne4= 15.0–0 e6 16.Nfd2 Nc3 (16...Nf6 17.Nf3=) 17.Nc3 Bb4 18.Ncb1 Bd2 (18...0–0 19.Nf3=) 19.Qd2 (19.Nd2 0–0+=) 19...0–0= 20.Qc3 (20.Nc3 Qa5=) 20...c6 21.Nd2 cb5 22.Rb1 (22.Qb2 Qa5 23.Nf3 Rc8=) 22...Rc8+= 23.Qb2 Bc6 (23...Qa4 24.c3 Qa5 25.Qb5 Qc3 26.Nf1+= (26.Qb6? Qd2 27.h3 Ba8–+)) 24.Ra1 Qb7 (24...Qb8 25.Nf3=) 25.Nb1 (25.Nf3 f6=) 25...Ra8 (25...Qc7 26.Ra2+=) 26.Ra8 Qa8 27.h3 (27.Qc3 Qa5+=) 27...Qa4 28.Nc3 Attacks the isolani on b5 28...Qc4 (28...Qa5 29.Qb3+=) 29.Qb3 (29.Na2 Bb7+=) 29...b4 (better is 29...f6+=) 30.Qc4?? (better is 30.Na2=) 30...dc4–+ 31.Nd1 (31.Na2 b3 32.cb3 cb3 33.Nc3–+) 31...c3 32.Kf1 Ba4 (32...Be4 33.Ke2–+) 33.Ke1 Bc2 34.f3 b5 35.e4 (35.h4 Bd1 36.Kd1 b3–+) 35...Kf8 36.Ne3 (36.h4 Bd1 37.Kd1 b3–+) 36...Bb1 (better is 36...b3 37.Ke2 b2 38.Nc2 b1Q–+) 37.Kd1 b3 38.Kc1 Bd3 39.Kd1 (39.Nd1 b4 40.Nb2–+) 39...b2 0–1. Trkn – Thomas Lazar, itsyourturn.com, 2000.

7.Ba1 b6 8.Nf3 Bb7 9.Be2 Qa8 10.Nc3 Nc5 11.0–0 Ne4 (11...Nf6 12.d3+=) 12.Ne4+– Be4 13.d3 Bd5 (13...Bb7 14.c4+–) 14.c4 (14.Qd2+–) 14...Be6 (14...Bb7 15.Be5 d6 16.Bc3+–) 15.Ng5 (15.Nd4 Qc8+–) 15...Bf5 16.e4 (16.f4 h6 17.Nf7 Kf7 18.Bh5 g6+–) 16...Bg6+– 17.f4 h6 18.Nh3 (18.Nf3+–) 18...Nf6 (better 18...Qd8+–) 19.f5+– Bh7 20.e5 Ng8 21.Bh5 c6 (21...Kd8 22.Bf7 Qa3 23.Qf3+–) 22.Bf7! Kf7 (22...Kd8+–) 23.Qh5 g6 24.fg6 Ke8 25.g7 Kd8 26.Rf8 (26.gf8Q Kc7 27.Qa8 Nf6 28.Qa7 Kc8 29.ef6 Bf5 30.Be5 d6 31.Qf5 e6 32.Qe6 Kd8 33.Qb6) 26...Kc7 27.Ra8 Bd3 (27...Bg6 28.Qg6 h5 29.Qe8 cb5 30.Qc8) 28.Qe8 Bc4 29.Ra7 (29.Qc8) 1–0. DEFFM – GuestHGVP, freechess.org, 2018.

7.Ba1 c6 8.bc6 (8.Nf3 Nf6+=) 8...dc6 9.Nf3 f6 (9...Nf6 10.Be2+=) 10.Bc4 (10.d4 Ng5+=) 10...Nh6 11.0–0 Nf5 (better is 11...b5 12.Be2 Nc7+=) 12.Nd4 (better is 12.d4+/–) 12...Ned4=+ 13.ed4 Nd4 14.Bd4 (14.Re1 e5=+) 14...Qd4–/+ 15.Be2 g6 (15...e5 16.c3 Qf4 17.d4–/+) 16.c4 (16.c3 Qf4–/+) 16...e6 (16...e5 17.Nc3–+) 17.Qc2 Qe5 (17...e5 18.Nc3–/+) 18.Bf3 Bd6 19.g3 f5 20.Qc3 0–0 21.Qe5 Be5–+ 22.Re1 Bd6 23.d4–/+ Bb4 24.Rd1 Bd7 25.c5 Ra8 26.Nd2 Ra3 27.Rb1?? Bd2–+ 28.Rb7 Be8 29.Rb8 Kf7 30.Rb7 Kf6 31.Rh7 Rf3 0–1. tanto (1715) – amtrack (1705), net–chess.com, 2002.

7.Ba1 d6 8.Nf3 +=.

7.Ba1 Nf6 8.Nf3 g6 9.d3 d5 10.Be2 Bg7 11.Be5 0–0 12.0–0 Nd7 (12...Qd7 13.Nc3+=) 13.Bg7 Kg7 (13...Ng7 14.Nbd2+=) 14.Nbd2 Ndc5 (14...Nf6 15.d4+=) 15.Qb1 Qd7 (15...Qd6 16.Qb2 Kg8 17.Ra1+/–) 16.c3 b6 (16...Qd6!?+/–) 17.d4+– Nb7 18.c4 (18.Ne5 Qe8+/–) 18...dc4 19.Ne5 Qd5 (19...Qe8 20.Bc4 Nd6 21.Rc1+/–) 20.Bc4+– Qd8 21.Qb2 (21.Nc6 Qe8+–) 21...f6+/– 22.Nc6 Qd7 23.Nb8 Qe8 24.Na6 (24.Bd5 Nd6 25.Bc6 Qf7+–) 24...Nd6+/– 25.Be6 (25.Be2 Bb7+/–) 25...Be6+= 26.Nc7 Qd7 27.Ne6 Qe6 28.Rc1 (28.Rb1 Ra8+=) 28...Qd5 (28...Ra8!?+=) 29.Rc7 Re8 30.Qb4 Kf8 31.Rc6 Nb5 (better is 31...Rb8!?+/–) 32.Rf6+– Kg7 33.Rb6 Nd6 34.Qc5 Qc5 (34...Qf5 35.Qf5 gf5 36.h4+–) 35.dc5 Nc8 36.Rb2 (36.Rb8 Rd8 37.Nf1 Kf6+–) 36...Rd8 37.f4 Kf6 38.Nf3 Rd5 (38...Rd1 39.Kf2+–) 39.Rc2 Na7 40.c6 Ke6 41.e4 Rd6 (41...Rd1 42.Kf2 Kd6+–) 42.Ng5 Kf6 43.e5 Kf5 44.ed6 Kf4 (44...ed6 45.c7 Kf6+–) 45.de7 Kg5 46.e8Q 1–0. Trkn – guest945, ICC, 2004.

4.Bb2 b6

5.d4 c5 6.d5 Ng5 (6...Nc7 7.Nf3+=) 7.Bd3+– d6 (7...h6 8.f4 Nh7 9.Nf3+–) 8.f4+– e5? (8...c4!? 9.Bc4 Ne4+–) 9.fg5 (9.Nc3 e4 10.Bc4 h6 11.fg5 Qg5+–) 9...Qg5 10.Qf3 f6 (10...Nf6 11.Nc3+–) 11.h3 (11.Nh3 Qh4 12.Nf2 a6+–) 11...Ne7 12.h4 Bb7?? (12...Qg4+–) 13.hg5 Bd5 14.e4 Bb7 15.gf6 gf6 16.Qf6 Rg8 17.Qd6 Ng6 18.Qe6 Ne7 19.Rh7 Rg7 20.Rg7 Bc8 21.Re7! Be7 Blocks the square `8 22.Qc6 Theme: Double Attack (22.Qc6 Kd8 23.Qd5 Bd7 24.Qa8 Bc8 25.Qa7+–) 1–0. petrobbo (2050) – Hislop, ChessWorld.net, 2013.

5.Be2 Bb7 6.Nf3 Nc5 (6...Nf6 7.Nc3=) 7.0–0 Na4 (7...a6 8.Nc3+=) 8.Bd4 c5 (8...Nf6!?+–) 9.bc6!+– Bc6 (9...Bc6 10.Ne5 Decoy; 9...dc6 10.c4 Combination) 10.Ne5 Bd5?? (better 10...Nf6+–) 11.Bb5 Nf6 12.Ba4 a6 (12...e6 13.g3+–) 13.c4 Be6 (13...Bc4 14.Nc4 b5 15.Nc3 ba4 16.Qa4+–) 14.Nc3 b5 (14...g6 15.Rb1+–) 15.cb5 ab5 16.Bb5 (16.Nb5!? Nd5 17.e4 Nb4+–) 16...Ra5 (16...g6 17.f4 Bg7 18.g4 Ng4 19.Ng4 Bd4 20.ed4+–) 17.a4 (17.Qb1 g6 18.Bd7 Bd7+–) 17...Qa8 (17...g6 18.f4 Bg7 19.g4 Ng4 20.Ng4 Bd4 21.ed4+–) 18.Bb6 Nd5 (18...g6 19.Ba5 Qa5+–) 19.Ba5 Ne3 20.de3 Qa5 (20...Qb7 21.Rb1 f6 22.Bd7 Qd7 23.Qd7 Bd7 24.Rb8 Bc8 25.Rc8) 21.Bd7 Kd8 22.Be6 Kc7 23.Rb1 fe6 (23...Qb6 24.Qd7 Kb8 25.Rb6 Ka8 26.Bd5) 24.Qd7 1–0. DEFFM – discanto, freechess.org, 2019.

5.Qf3 Rb8 6.Bc4 +=.

5.Qf3 d5 6.c4 (6.Nh3 Nc5+=) 6...Bb7 7.cd5 Bd5 8.Qd1 a6 9.ba6 Qd7 (9...Nc5 10.Nc3+=) 10.Nc3+/– Nc5 (10...Nf6 11.Nf3 Bf3 12.Qf3+/–) 11.d4 (11.Nf3 Nf6+/–) 11...Na6 12.Nd5 (12.Nf3 Bf3 13.Qf3 c6+/–) 12...Qd5 13.Qb3 Qb3?? (better is 13...e6 14.Bb5 Ke7+/–) 14.ab3+– Nf6 15.Ba6 Nd5 (15...Nd7+–) 16.Bb5 (16.Bb5 c6 17.Bc6 Kd8 18.Ra8 Kc7 19.Bd5+–) 1–0. pcmvr (1960) – inaldo, internet, 2007.

5.Nf3 a5 6.Bc4 Bb7 7.0–0 d5 8.Be2 Nc5 9.c4 Ne4 10.d3 Nef6 11.cd5 Bd5 (11...Nd5 12.Nc3+–) 12.e4 Bb7 13.Nbd2 e6 14.Qc2 (14.Rc1 Rc8+–) 14...Bc5 (14...Rc8!?+=) 15.Nb3 Qd7? (better 15...Be7+–) 16.Nc5+– bc5 17.Qc5 Rc8 (17...Qd6 18.Rfc1 Qc5 19.Rc5+–) 18.Qa7 c6 19.Ne5 Qd8 (19...Qe7+–) 20.bc6 Ba8 1–0. DEFFM – GuestVBGH, freechess.org, 2018.

5.Nf3+= a6 6.Ne5 Nh6 7.Nc3 +=.

5.Nf3+= Bb7 6.c4 (6.Be2 a6+=) 6...d5 (6...a6 7.ba6 Ra6 8.c5+=) 7.cd5+/– Bd5 (7...Qd5 8.Nc3 Qd6 9.d4+/–) 8.Nc3 Bb7 9.Be2 (9.Bc4 Nf6+/–) 9...Nc5 (9...Nf6 10.Bc4+/–) 10.d4 Ne4 (10...Nd7 11.0–0+/–) 11.Ne4 Be4 12.Bd3 (12.0–0 e6+/–) 12...Bb7 (12...Nf6 13.Rc1+/–) 13.0–0 e6 14.Rc1 Nf6 15.Ne5 Qd5 (15...Bd6 16.Nc6 Bc6 17.Rc6+/–) 16.f3 Qa2 (16...Qd8 17.Nc6 Bc6 18.Rc6+/–) 17.Rc7 Nd5 (17...Qb2 18.Rf2 Qb4 19.Rb7+–) 18.Rb7 (18.Qc1 Qb2 19.Qb2 Nc7+–) 18...Qb2 19.Qe2 (better is 19.Qa1!? Qd2 20.Ra7 Qe3 21.Kh1+–) 19...Qe2+/– 20.Be2 Ne3 21.Rc1 Be7 (21...Nf5 22.Nf7 Nd4 23.Bd3+/–) 22.Kf2 (22.Rcc7 Bf6+/–) 22...Nf5 (22...Nd5 23.Ra1+=) 23.Rcc7+/– f6 24.Nc6 Now all is on a7 24...Bd6 25.Ra7 (25.Rd7 Bh2 26.Bc4 (26.Ra7?! Ra7 27.Ra7 Bg3 28.Kg1 0–0=) 26...Bg3 27.Ke2+/–) 25...Ra7 (25...0–0!? 26.Ra8 Ra8+/–) 26.Ra7+– 0–0 (26...Rf8 27.Bd3 Ne7 28.Bh7+–) 27.Bc4 Re8 28.g4 Nh4 29.h3 (29.Rd7 Bh2 30.Nd8 Kh8+–) 29...Kf8 (29...Ng6 30.Rd7 Ba3 31.Rb7+–) 30.Rb7 (30.Rd7 Ba3 31.Nd8 Re7 32.Ne6 Kf7 33.Nc5 Ke8 34.Re7 Ke7+–) 30...f5 (30...Ng6 31.Rb6 Nf4 32.h4+–) 31.Rb6 e5? (31...Ng6+–) 32.de5 (better is 32.Rb7 Be7 33.Ne5+– (worse is 33.Ne7 Re7 34.Re7 Ke7 35.de5 Ng6+–; worse is 33.Re7 Re7 34.Ne7 Ke7 35.de5 Ng6+–)) 32...Bc5+/– 33.Kg3 Bb6 (33...g5 34.Rb7 f4 35.Kh2 Nf3 36.Kg2 Ne5 A) 37.Rh7 f3 (37...Nc4 38.Rh8 Kf7 39.Nd8 Ke7 40.Nc6 Kd7 41.Rh7 Kd6 42.Rh6 Kc7 43.b6 Nb6 44.Na5 Re2 45.Kf1–+) 38.Kg3 Nc4 39.Rh8 Kg7–+; B) 37.Bd5+/–) 34.Kh4+– fg4 35.hg4 (35.Kg4 Ra8 36.Bd5 Ra1+/–) 35...g6 (35...Be3 36.Bd5+/–) 36.e6 (36.Kg5 Kg7 37.Kf4 Ra8+–) 36...Kg7 (36...Ra8 37.e7 Kg7 38.g5+–) 37.f4 Bc5 38.f5 Ra8 39.Kg3 (better is 39.fg6 hg6 40.Bd5+/–) 39...Kf6? (better is 39...gf5 40.gf5 Kf6+=) 40.Kf4+– g5? (better is 40...Bd6 41.Ke4 Ra1+–) 41.Ke4 Ra4 (41...Bd6+–) 42.Kd5 Ba3 (42...Bb6 43.e7 Ra8 44.Kd6+–) 43.b6 Ra8 44.b7 Re8 45.b8Q Rb8 46.Nb8 (46.Nb8 Ke7 47.Nd7+–) 1–0. Kucharkowski,Jens – Thiel, Freital, 1982.

5.Nf3+= Nc5 6.d4 Ne4 7.Bd3 Bb7 8.Qe2 (8.Nbd2 Ngf6 9.Ne4 Ne4 10.Ne5+/–) 8...c5? (8...Ngf6 9.0–0+=) 9.a4 (better is 9.bc6!? Bc6 10.Ne5+–) 9...Qc7 10.0–0 Qd6? (10...Ngf6!?+=) 11.c4 (11.Ne5 Ngf6+–) 11...cd4 (11...Ngf6!?+/–) 12.ed4+– Nef6 (12...Ngf6 13.Ne5+–) 13.a5 Ng4 (13...Nh5 14.g3+–) 14.Ne5 Ne5 15.de5 (15.Qe5?! e6+–) 15...Qh6 16.ab6 Qg5 (16...Qb6 17.Be4 Be4 18.Qe4 Rc8+–) 17.Be4 d5 (17...ab6 18.Nd2 Rb8 19.Nf3+–) 18.ed6 Rd8 (18...ab6 19.Bb7 Ra1 20.Bc6 Kd8 21.Ba1 e5 22.Be5 Ne7 23.de7 Qe7 24.Rd1 Kc8 25.Qe3 Qd7 26.Bd7 Kb7 27.Qf3 Ka7 28.Bc8 Bd6 29.Qb7) 19.Bb7 ab6 20.Bc6 Rd7 21.Ra8 1–0. Boehnke,Hartmut (2175) – Mitschke,Norbert (1895), remoteschach.de, 2006.

5.Nf3+= Nf6 6.Be2 a5 (6...a6 7.a4+=) 7.0–0+/– c5 (7...Bb7 8.Ne5+/–) 8.Na3 h6 (8...Bb7 9.c4+/–) 9.Nc4 (9.c4 d5+/–) 9...d6 (9...g6 10.Nfe5+=) 10.Nh4 (10.d3 g5+/–) 10...Ng5 (10...a4 11.Bf3 Ra7 12.Bc6 Bd7 13.Bf6 Bc6 14.bc6+=) 11.f4+/– d5 (11...Ne6 12.Nf3+/–) 12.Ne5 (better is 12.fg5 hg5 13.Ng6 fg6 14.Ne5+/–) 12...Qc7?? (better is 12...Nge4+/–) 13.fg5+– hg5 14.Nf5 (14.Nhf3 g4 15.Ng5 Rh5+–) 14...Bf5 (14...e6 15.Ng3 Bd6 16.d4+–) 15.Rf5 Nd7 (15...g4 16.Bg4 e6 17.Rg5+–) 16.Rg5 (16.Bh5 g6 17.Ng6 Rh7 18.Nf8 Nf8+–) 16...f6 (16...e6 17.Bh5 Ne5 18.Be5+– (18.Re5?! 0–0–0+–)) 17.Rh5 (better is 17.Bh5!? Kd8 18.Nf7 Kc8 19.Rd5 Rh7+–) 17...Rh5 18.Bh5 Kd8 19.Nd7 (better is 19.Nf7!? Kc8+–) 19...Qd7 20.Qf3 e6 (20...Rc8 21.d3+–) 21.a4 (21.c4 Bd6+–) 21...Ra7 (21...Kc7 22.Rd1+–) 22.Rf1 (22.e4 Be7+–) 22...Be7 (22...Bd6 23.Bg6+–) 23.Qg4 g5 (23...Bd6+–) 24.Bf6 Bf6 (24...Qd6 25.Qg5 Rd7 26.Qg8 Kc7+–) 25.Rf6 Qg7 (25...c4+–) 26.Qe6 Qd7 27.Qg8 (27.Qb6 Ke7 28.Rf7 Ke8 29.Qb8 Qd8 30.Ra7 Kf8 31.Qd8) 27...Ke7 (27...Kc7 28.Bg4! Ra8 29.Qa8 Qe6 30.Qa7 Kd8 31.Rf8 Qe8 32.Qd7) 28.Rf7 (28.Qf8) 28...Ke6 (28...Kd6 29.Qf8 Kc7 30.Rd7 Kd7 31.Bg4 Kc7 32.Qe7 Kb8 33.Qd8 Kb7 34.Qc8) 29.Rd7 (29.Qg6 Ke5 30.Qf6 Ke4 31.Bf3) 29...Kd7+– 30.Qf7 Kd6 31.Qa7 Ke5 (31...d4 32.Bg4 de3 33.de3 Kd5 34.Qf7 Kd6 35.Qd7 Ke5 36.Qe6) 32.Qb6 1–0. Schutz – Tebbe, 1985.

4.Bb2 c6

5.a4 Qa5 6.Nf3 Nf6 7.Be2 Nd5 8.0–0 c5 9.c4 Nb4 10.Nc3 Qb6 (10...b6 11.Na2 a6 12.Nc1 ab5 13.ab5 Qa1 14.Ba1 Ra1 15.d4+–) 11.a5+– Qd6 12.Ne4 Qc7 13.Qb3 b6 (13...d6 14.Bc3+–) 14.ab6 Qb6 15.d4 (15.Nc5 Nc5 16.Qb4 a5+–) 15...Bb7 (better 15...a5+–) 16.dc5 Nc5 17.Nc5 (17.Qb4?! Be4 18.Bd4 d6+–) 17...Qc5 18.Bd4 (better 18.Bc3 e5 19.Ne5+–) 18...Qd6? (18...Qc8+–) 19.c5 (worse 19.Ra7 Ra7 20.Ba7 Bf3 21.Bf3 e6+–) 19...Qd5 (19...Qg6 20.Qb4 f6 21.Qc4+–) 20.Qb4 e6 21.Rfc1 Be7 22.Qa4 (22.Qa4 0–0 23.c6 dc6 24.bc6+–) 1–0. GuestJCSP – GuestBFTD, freechess.org, 2017.

5.a4 a6 6.Nf3 ab5= 7.ab5 Ra1 8.Ba1 cb5 (8...Nf6!?=) 9.Bb5+– Qa5 (9...Nf6 10.Nc3+–) 10.Nc3 Nc5 (10...Nf6!?+–) 11.Ne5 Nf6 12.0–0 e6 13.d4 (13.Nc4 Qc7+–) 13...Nce4 14.Ne4 (14.Qd3 Nd6+–) 14...Ne4+– 15.c4 Bd6? (better 15...Nd6 16.Qh5 Qb4+–) 16.Qg4 0–0 (16...Be5 17.de5 Nc3 18.Qg7 Rf8 19.Qh7 Nb5 20.cb5 b6+–) 17.Qe4 f5 18.Qh4 b6 (18...Qd8 19.Qg3 Bc7+–) 19.Nd7 Bd7 20.Bd7 e5 (20...Rf6 21.d5 e5 22.Qh3+–) 21.c5! bc5 (21...Bc5 22.dc5 Qc5 23.Be6 Kh8 24.Qg3+–) 22.de5 Qa7 (22...Qd8 23.Be6 Kh8 24.Qd8 Rd8 25.ed6 Rd6+–) 23.Be6 (23.Be6 Kh8 24.ed6 Qb8 25.Qe7 Rg8 26.d7 Qh2 27.Kh2 h6 28.Bg8 Kg8 29.Qg7) 1–0. GuestGMHQ – GuestPFFH, freechess.org, 2020.

5.a4 cb5 6.ab5 Nc7 7.Nc3 e5 (7...d5 8.Nf3+=) 8.Nf3+– Bb4 (better 8...d6!?+–) 9.b6+– Na6 (9...ab6 10.Ra8 Na8 11.Nd5+– (worse 11.Ne5 Nf6+–)) 10.Ba6 (10.Nd5 Bd6 11.Ne5 Nf6+–) 10...ba6 (10...Bc3 11.Bc3 (11.dc3?! Qb6 12.Ne5 Qb2+–) 11...ba6 12.Ne5+–) 11.Nd5 Bc5? (11...Bd6 12.Ne5 Bb7+–) 12.Nc7 Ke7 (12...Kf8 13.Na8 e4 14.Ne5 ab6 15.Qh5+–) 13.Na8 Bd6 (13...Bb7 14.Ne5 (worse 14.Be5 f6+–) 14...Nf6 15.Nc7+–) 14.Be5 (14.Be5 Be5 15.Ne5+–) 1–0. Guest – Guest775, internet, 2020.

5.a4 cb5 6.ab5 d6 7.Nf3 Qb6 8.d4 (8.Nc3 Nf6+–) 8...Bd7 9.c4 Nf6 10.Bd3 (better 10.Nbd2+–) 10...d5? (better 10...g6+=) 11.c5+– Qa5?? (11...Qd8+–) 12.Ra5 1–0. DEFFM – Majinu, freechess.org, 2019.

5.a4 cb5 6.ab5 d6 7.Nf3 Bd7 8.c4 Nc5 9.Nc3 Bg4 10.d4 Bf3? (better is 10...Nd7+/–) 11.Qf3+– (11.gf3?! Nd7+/–) 11...Nb3 (11...Nd7 12.Qb7 Ngf6 13.Ra7 Ra7 14.Qa7+–) 12.Ra3 (better is 12.Qb7 Rc8 13.Ra7+–) 12...Na5 13.Bd3 b6?? (13...Rc8 14.Ra4+–) 14.0–0 (better is 14.Ra5 Nf6 15.Ra6+–) 14...Nf6 15.Nd5 Nd7? (15...Rc8 16.Nf6 gf6 17.Rc3+–) 16.Bc3 (16.Nc7 Qc7 17.Qa8 Nb8+–) 16...e6? (16...Rb8 17.Ba5 ba5 18.Rfa1+–) 17.Nf4 (better is 17.Nc7! Qc7 18.Qa8 Qd8 19.Qd8 Kd8 20.Ba5 d5+–) 17...Nf6? (better is 17...Nc4 18.Bc4 d5 19.Nd5 Ba3 20.Nc7 Qc7 21.Qa8 Nb8+/–) 18.Ba5 ba5 19.Ra5 Qa5 20.Qa8 Ke7 21.Qb7 Nd7 (21...Ke8 22.c5 dc5 23.dc5+–) 22.g4 (better is 22.c5 dc5 23.dc5+–) 22...g5 (22...Qb6 23.Qa8+–) 23.Nh5 (better is 23.c5 Bh6 24.c6 gf4 25.Qd7 (25.cd7?! Rd8+–) 25...Kf6 26.h4+–) 23...h6 (23...Qb6 24.Qa8+–) 24.f4 (better is 24.c5 dc5 25.dc5+–) 24...Qd2 25.Bb1 (better is 25.Qe4 Kd8 26.Bb1+–) 25...Qe3+/– 26.Kh1 Qd4? (26...Qe2 27.Qf3 Qf3 28.Rf3 gf4+/–) 27.f5?? (better is 27.fg5 Kd8 28.Qa8 Ke7 29.Nf6 Nf6 30.gf6 Kd7 31.Re1 Qc4 32.Qa7 Qc7 33.b6 Qa7 34.ba7+–) 27...Qg4?? (better is 27...Qc4 28.Re1 Kd8= (28...Qg4 29.f6 Kd8 30.Qa8 Kc7 31.Qa7 Kd8 32.Qa8 Kc7 33.Qc6 Kd8 34.Rc1+–)) 28.f6 Kd8 29.Qa8 Kc7 30.Qa7 Kc8 31.Qa6 Kc7 32.b6 (32.Qc6 Kd8 33.b6 Nb6 34.Qb6 Kc8 35.Bd3 Qh5 36.c5 Qh2 37.Kh2 dc5 38.Ba6 Kd7 39.Rd1 Bd6 40.Qd6 Ke8 41.Bb5) 32...Nb6= 33.Qa7 Kc6 34.c5 dc5 35.Rc1?? (better is 35.Ng3 Bd6 36.Be4 Nd5 37.Qa6 Kc7 38.Rb1=) 35...Qf3–+ (35...Qh5 36.Be4 Nd5 37.Qa6 Kc7 38.Rb1+=) 36.Kg1 Qe3 37.Kg2 Qc1 (37...Qd2 38.Kg1 Qc1 39.Kg2 Qb2 40.Kg1 Qb1 41.Kf2 Qc2 42.Kf1 Qd1 43.Kf2 Qh5 44.h3–+) 38.Be4 Nd5 39.Qa6 Kd7 40.Qb7 Nc7 41.Qc6 (41.Bc6 Kd6 42.Ng3 Nd5 43.Bd5 Qd2 44.Kg1 Qd4 45.Kf1 Qd1 (45...ed5 46.Nf5 Ke6 47.Nd4 cd4 48.Qc8 Ke5 49.Qe8 Kf6 50.Qc6 Kg7 51.Qd5=+) 46.Kf2 ed5 47.Qf7 Qc2 48.Kg1 g4–+) 41...Kc8 42.Ng3 Qb2 43.Kh3 (43.Kg1–+) 43…Qe5 (44.Qb7 Kd8–/+; better is 43...h5 44.Qb7 Qb7 45.Bb7 Kb7–+) 0–1. maxum – ChiefWahoo, Live Game Caissa's Web, 2004.

5.a4 cb5 6.ab5 Nf6 7.c4 g6 8.Nf3 Bg7 9.Be2 0–0 10.0–0 b6 11.d3 Bb7 12.Nbd2 Nc7 13.Nb3 d5 14.Nfd2 dc4 15.dc4 e6 16.Bf3 Rb8? (better is 16...Qc8+=) 17.Ra7 Bf3 18.Nf3 (18.gf3?! Ra8 19.Rb7 Rb8 20.Rb8 Qb8+/–) 18...Nce8? (18...Qd1 19.Rd1 Rfd8 20.Rd8 Rd8 21.Bd4+–) 19.Nbd4 (19.Ba3 Qc8 20.Bf8 Bf8+–) 19...Rc8? (better is 19...Ra8 20.Nc6 Qd1 21.Rd1 Ra7 22.Na7 Ne4+–) 20.Nc6 Qd1 21.Rd1 Ne4 (21...Rc7 22.Ra6 Nd7+–) 22.Ne7 Kh8 23.Bg7 (better is 23.Nc8 Bb2 24.Nb6+–) 23...Kg7 (23...Ng7 24.Nc8 Rc8+–) 24.Nc8 N8f6 25.Nb6 Rb8 (25...Nc5 26.Ne5+–) 26.Na4 Rc8 (26...Ng4 27.Rdd7 Rf8 28.b6+–) 27.Rc1 (27.Ne5 Ne8+–) 27...Rd8 (27...Ng4 28.c5 Ngf2 29.Ne5+–) 28.b6 (28.Ne5!? Nd6 29.Rd1 Nb7 30.Rd8 Nd8+–) 28...Nd7 (28...Rf8 29.c5 Nd5 30.Ne5+–) 29.Rd1 (29.Rd1 Nb6 30.Rd8 Nc4 31.Rdd7+–) 1–0. Hal1958 – Froilo, playchess.de, 2005.

5.a4 cb5 6.Bb5 a6 7.Be2 Nf6 8.Nf3 Ne4 9.Nc3 Nc3 10.Bc3 d6 11.0–0 d5 (11...Nc5 12.Qb1+/–) 12.a5 Nc7 (12...f6 13.Bb4+/–) 13.Bb2 e6 14.c4 f6 15.Qc2 Be7 16.Rfc1 0–0 17.Bd3 f5 18.Be5 dc4 19.Bc4 Nd5 Black prepares the advance f4 20.Qb3 Bf6 21.d4 f4? (better is 21...Rf7+–) 22.e4 Be5 23.ed5 (23.de5?! Nc7+–; 23.Bd5?! Bd4 24.Nd4 ed5+/–) 23...ed5 (23...Bf6 24.de6 Kh8+–) 24.Bd5 Kh8 25.Ne5 Qh4 (25...Qd6 26.Re1 g5 27.Rac1+–) 26.Rc7 Qg5 (26...Bf5 27.Nf7 Rf7 28.Rf7+–) 27.Nf7 Rf7 28.Rf7 Be6 (28...Bg4+–) 29.Be6 f3 30.Qf3 1–0. pierred – anony, internet, 2015.

5.a4 d5 6.Nf3 Nf6 7.Be2 Nc5 (7...g6!?=) 8.d4 Nce4 9.Ne5 (9.0–0 Bf5+=) 9...Qd6 (9...Qa5 10.Nd2 Qb4 11.bc6 A) 11...Qb2? 12.Rb1 Nc3 13.Rb2 Nd1 14.cb7 (14.Bd1?! bc6 15.Nc6 Bd7+–; 14.Kd1?! bc6 15.c4 h5+/–) 14...Bb7 15.Rb7+– (15.Bd1?! Bc8+–; 15.Kd1?! Bc8+–); B) 11...bc6+/–) 10.0–0+/– Bg4?? (better is 10...Nd7+/–) 11.Bg4+– Ng4 12.Qg4 Qb4 (12...cb5 13.Nc3 Nc3 14.Bc3 g6+–) 13.Qd7 1–0. Offenbach/Holaus,Verena (2285) – Rupp,Gerald (1770), remoteschach.de, 2006.

5.a4 Nf6 6.f4 g6 7.Nf3 Bg7 8.Be2 0–0 9.0–0 Ne4 10.Bg7 Ng7 11.c4 d6 12.Qc2 f5 13.Nc3 Nc3 14.Qc3 Ne8 15.c5 Bd7 16.Ng5 Nf6 17.Qb3 Kg7 18.Rac1 Re8? (18...h6 19.bc6 bc6 20.Qc3+=) 19.Bf3 (better is 19.Qf7!? Kh8 20.Rf3+–) 19...d5+/– 20.Be2 Ne4 21.Qb2 Kg8 22.Ne4 fe4 23.g4 e6 24.g5 (24.Qe5 Rc8+=) 24...Qc7 25.Bg4 Rad8 26.h4 (26.Qf6 Qa5 27.bc6 bc6=) 26...e5= 27.b6 (27.Be2 Bh3 28.Rf2 ef4 29.Rf4 Rf8+=) 27...ab6+= 28.cb6 Qc8 29.Be2 Bg4 30.d4 ef4 (30...ed3 31.Bd3 Bh3 32.Rf2 Qg4 33.Kh1 Qh4 34.Qd2–+) 31.ef4? (better is 31.Rf4!? Be2 32.Qe2=) 31...Be2 32.Qe2 Qh3 33.Qh2 Qd3 34.Rcd1 Qa3 35.h5 Re7 (35...Qa4?! 36.hg6 hg6 37.Qh6+=) 36.Ra1 Qb4 37.Rfd1 Qb6 38.hg6 hg6 39.Ra3 Rh7 40.Rh3 Qc7 (40...Rdd7!?–+) 41.Rh7–/+ Qh7 42.Qg3 (42.Qh7!? Kh7 43.Rb1–/+) 42...Qc7 43.Rf1 Kg7 44.Qh3 0–1. Buczinski,Henryk – Drabiniok,Kazimierz, Siemianowice Slaskie Poland, 1991.

5.Nc3 cb5 6.Bb5 Qb6 7.a4 a6 8.a5 Qc7 9.Bd3 b5 10.Nd5 Qd6 11.Be4 Ra7 (11...Bb7 12.Ba3 Qe5 13.Nf6 Nf6 14.Bb7+=) 12.Nf3+/– f6 13.Nd4 g6 14.Bf3 Bb7 15.Ne6 de6? (better is 15...Bd5!? 16.Bd4 Rb7 17.Nf8 Kf8+=) 16.Bd4+– Ra8 17.Nf6! Nf6 (17...ef6 18.Bb7 Discovered attack; 17...Nf6 18.Bb7 Discovered attack) 18.Bb7 Rb8 19.Qf3 Bg7 20.Qc6 Qc6 21.Bc6 Kf7 22.Bf3 Nh5 23.c3 (23.Bh5 Bd4 24.Bg6 hg6 25.ed4 Rh4+–) 23...Bd4 24.cd4 Rhc8 25.0–0 Rc2 (25...b4 26.Be2 Rc6 27.Rfc1+/–) 26.Rfc1+– Rbc8 27.Rc2 Rc2 28.Bb7 Rd2 (28...b4 29.g4 Ng7 30.Rb1+–) 29.Ba6 b4 30.Bc4 Nf6 (30...Rc2 31.a6 Rc4 32.a7+–) 31.a6 Nd7 32.a7 Nb6 33.a8Q Na8 34.Ra8 Rd1 (34...Rc2 35.Bf1 b3 36.f4+–) 35.Bf1 b3 (35...g5 36.Rb8 Rb1 37.f4+–) 36.Rb8 Rb1 37.g3 b2 38.Kg2 Kf6 39.Rb5 h6 40.Bd3 Rd1 41.Bc2 b1Q 42.Rb1 Rb1 43.Bb1 g5 44.Kf3 h5 45.g4 h4 46.Ke4 Kg6 (46...h3 47.Bc2+–) 47.Ke5 Kf7 (47...Kg7 48.Ke6 Kf8 49.Kf5+–) 48.h3 (48.h3 Ke8 49.Ke6+–) 1–0. Macko – Superyetkin, playchess.de, 2005.

5.Nc3 cb5 6.Bb5 Nc7 7.Be2 e5 (7...d5 8.Nf3+=) 8.d4 ed4 9.Qd4 Nf6 10.Nf3 d5 11.0–0 Be7 12.Rfd1 Be6 13.Qa4 Bd7 14.Qf4 Ne6 15.Qe5 0–0 (15...Bc6!?+/–) 16.Nd5+– Nd5 17.Qd5 Bc6 18.Qf5 Qb6?? (better is 18...Qc8+–) 19.Bd3 Ng5 (19...g6 20.Qe5 f6 21.Qe6 Kh8 22.Bg6 Be8 23.Qb6 ab6 24.Be8 Rfe8+–) 20.Ng5 (20...g6 21.Qe5 Qb2 22.Qb2 Bg5 23.Bb5+–) 1–0. orane (1795) – ManuelCardoso (1645), Tour A637, 2004.

5.Nc3 Qb6 6.Rb1 Nf6 7.Nf3 Nd5 (7...Nc7 8.Na4 Qa5 9.c4 cb5 10.cb5+=) 8.bc6+/– Qc6 9.Ne5 Qd6 (better is 9...Nc3!? 10.Bc3 Qc7+/–) 10.Qh5 Nf6 11.Qf7 Kd8 12.f4 b6 13.Bc4 Bb7 14.Nb5 Qc5 (better is 14...Qb4 15.a3 Qc5+–) 15.Ba3 (15.Be6?! Qb5 16.Bc4 Qb4+–) 15...Qc8 16.Be6 de6 (16...Bg2 17.Rg1 Bc6 18.Rg7 Bb5 19.Be7 Kc7 20.Bf6 Bg7 21.Bg7+–) 17.Nd4 Bd5 (17...Kc7 18.Be7 Be7 19.Qe7 Kb8 20.Qg7+–) 18.c4! Bc4 (18...Qc4 19.Nc4) 19.Ndc6 Kc7 20.Ne7 Be7 21.Qe7 Nd7 22.Rc1 b5 23.Nc4 bc4 24.Rc4 Kb7 25.Rc8 Kc8 26.Ke2 Rb8 27.Rc1 (27...Kb7 28.Qd7 Ka8 29.Rc7 Rbf8 30.Ra7 Kb8 31.Bd6) 1–0. market (2285) – il_conte, GameColony.com, 2002.

5.Nc3 Nc7 6.Nf3 cb5 7.Bb5 Nb5 8.Nb5 Qb6 9.c4 a6 10.Bd4 Qa5 11.Bc3 Qb6 12.Nbd4 (12.Qa4 f6+=) 12...d6 13.0–0 e5 14.Ne2 Bg4 15.Qa4 (15.d3 Bf3 16.gf3 Nf6+=) 15...Qc6 16.Qc6 bc6 17.Ba5 (17.d3 f5=) 17...Bf3 (17...d5 18.Rab1=+) 18.gf3 Ne7 19.d4 Ng6 20.Rab1 Nh4 (20...ed4 21.ed4 Nh4 22.Rb3=) 21.f4 Nf3 (21...e4 22.Rb7=) 22.Kg2 Nd2?? (better is 22...e4=) 23.Bd2+– ed4 24.Nd4 c5 25.Nc6 Rc8 (25...h6 26.Rfd1+–) 26.Rb6 Ra8 27.Rb8 Rb8 28.Nb8 Be7 29.Na6 (29.Rb1!? f5+–) 29...0–0 (29...Kd7 30.Rb1 Ra8 31.Rb7 Kc6 32.Re7 Ra6 33.Rf7 Ra2 34.Bc3+–) 30.Rb1 (30...Ra8 31.Rb6+–) 1–0. Vettenburg – Johannesen, corr ICCF, 1984.

5.Nc3 g6 6.Nf3 Bg7 7.Be2 Nf6 8.bc6 (8.0–0 cb5 9.Nb5 0–0=) 8...bc6 (8...dc6 9.0–0=) 9.0–0 (9.Rb1 0–0+=) 9...d5 (9...0–0 10.Rb1=) 10.Na4 (10.Ne5 Qd6 11.Nc6 a6+=) 10...0–0 11.c4 Ba6 12.Rc1 (12.d3 dc4 13.dc4 Qc8=) 12...Rb8 (12...dc4 13.Bc4 Bc4 14.Rc4+=) 13.Be5+= Rb4 (13...Rb7 14.d4+=) 14.a3 Rb7 15.d4 Qa5 16.Re1 Rd8 17.Qc2 dc4 18.Bc4 Bc4 19.Qc4 Rb5 20.Rb1 a6 21.Rec1 Rc8 22.Qc2 Nf8 (22...h6 23.Rb5 ab5 24.Nc5 Nc5 25.Qc5+=) 23.Nb2+/– Qd8 24.a4 Rb6 25.Nd3 N8d7 26.Qc4 (26.Rb6 Qb6 27.Rb1 Qd8+/–) 26...a5 27.Rb6 ½–½. Woschkat,Karl_Heinz – Kiebitz,Siegfried, compuserve, 1995.

5.c4 a6 6.a4 ab5 7.cb5 cb5 8.Bb5 Nf6 9.Nf3 Nd5 (9...Nc7 10.Nc3+=) 10.0–0+– Ndc7 11.Nc3 (11.Be2 b6+–) 11...Nb5+= 12.Nb5 Nc7 13.h3 Nb5 (13...d5 14.Qc2 Na6 15.Rfc1+=) 14.ab5+– Ra1 (14...Rb8 15.Ra7+–) 15.Qa1 (worse 15.Ba1 d6+–) 15...e6 (15...f6 16.Rc1 d5 17.Qa8+–) 16.Bg7+– Bg7 (16...Rg8 17.Bf6 Be7 18.Be7 Ke7 19.Qa4+–) 17.Qg7 Rf8 (17...Ke7 18.Rc1 b6 19.Qg5 Ke8 20.Qe5+–) 18.Qh7 Qf6 (18...d6 19.Ra1+–) 19.d4 (19.Qc2 Qd8+–) 19...Rh8 (19...b6 20.Qe4 Qd8 21.Ra1+–) 20.Qe4 Qg7 21.Kh2 (21.Rc1 Ke7+–) 21...f5 (21...Rg8 22.g3+–) 22.Qc2 b6 (22...Ke7+–) 23.Qc8 Kf7 (23...Ke7 24.Qb7 Kf6 25.Rc1+–) 24.Qd7 Kf6 25.Qg7 Kg7 26.Ne5 (26.Rc1 Kf6+–) 26...Rd8 27.Rc1 Ra8 (27...Rd5 28.Rb1+–) 28.Rc6 Kf6 (28...Re8 29.Rb6 Re7 30.Rb8+–) 29.Rb6 (better 29.Rc7 Rg8 30.g4 fg4 31.hg4 Kg5+–) 29...Ra2 (29...Ra7 30.Rc6 Ra5 31.b6+–) 30.Kg3 (30.Rb7 Rf2 31.h4 Rg2 32.Kg2 f4 33.Rf7) 30...Ra5 31.Kf3 (better 31.Rb7 Rb5 32.Rb5+–) 31...Ra3 32.g3 (32.Rb7 Ra2 33.h4 Rf2 34.Kf2 f4 35.Rf7) 32...Ra5 33.h4 (better 33.Rb7 Rb5 34.Rb5+–) 33...Ra4 34.Rb7 Ra8 (34...Rd4 35.ed4 f4 36.Rf7) 35.Rf7 1–0. Abdullaevich (1800) – CHARLESESE, lichess.org, 2019.

5.c4 cb5 6.cb5 f6 (6...d6 7.Nf3+=) 7.Be2 g6 (7...d5 8.Nf3+=) 8.Nc3 Bg7 9.Rc1 b6 10.Bf3 Rb8 11.Qc2 Nc7 12.Nh3 h6?? (better is 12...a6+/–) 13.Qg6+– Kf8 14.Bh5 Qe8 15.Nf4 e5 (15...Qg6 16.Ng6 Kf7 17.Nh8 Kf8 18.Ng6 Ke8 19.Nf4 Kf8+–) 16.Ba3 Ne7 17.Ncd5 ef4 18.Be7 (18.Be7 Qe7 19.Ne7 Ke7 20.Qg7 Kd6 21.Qh8+–) 1–0. Woelfelschneider,Peter – Jarz, 2009.

5.c4 Qb6 6.a4 d5 (6...Nf6 7.a5 Qd8 8.Nf3+=) 7.cd5 cd5 8.Nf3 Nc5 9.Qc2 (9.a5 Qd8+=) 9...e6 (9...Bg4 10.a5 Qd6 11.Ne5+=) 10.Be2 Be7?? (better is 10...Bd7+=) 11.Bg7 Bf6 12.Bh8 Bh8 13.Nc3 (13.d4 Ne4+–) 13...Nf6 (13...Ne4 14.Rc1 Bc3 15.dc3+–) 14.Rc1 Ncd7 15.0–0 e5 16.d4 ed4 17.ed4 Ng4 18.Nd5 Qd8 19.Nc7 Ke7 20.Qe4 Kf8 21.Na8 Ndf6 22.Qc2 Nd5 23.Qc8 Qc8 24.Rc8 Kg7 25.Ne5 Ne7 26.Bg4 (26...Nc8 27.Bc8+–) 1–0. nogumo – Kitama, mySchach.de, 2005.

5.Nf3 f6 6.a4 a6 7.d4 ab5 8.ab5 Ra1 9.Ba1 Qa5 10.Nbd2 cb5 11.d5 Nc7 12.c4 (better 12.d6!? ed6 13.Bd3+=) 12...bc4=+ 13.Bc4 d6 (13...Nd5!? 14.0–0 Nb4=+) 14.0–0+= e6 (worse 14...Nd5 15.Nb3 Ne3 16.fe3+–) 15.de6 Ne6 (15...d5 16.Bd3+=) 16.Be6 (better 16.Ne4!? Qc7 17.Qb3+–) 16...Be6= 17.Qc2 Be7 18.Rb1 Nh6 19.Nc4 (19.Bd4 b5+=) 19...Bc4 (better 19...Qc7!? 20.Qa4 Kf7=) 20.Qc4+– d5 (20...Nf7 21.Bd4 Nd8 22.e4+=) 21.Qc8 Bd8 22.Qe6 Be7 23.Nd4 Nf7 (better 23...Qc5+–) 24.Rc1?? (better 24.Nf5 Qc7 25.Ng7 (25.Ne7?! Qe7 26.Qd5 Nd8+–; 25.Qe7?! Qe7 26.Ne7 Ke7+=) 25...Kf8 26.Bf6+–) 24...Nd8+= 25.Qc8 (25.Qg4 Qa3 26.Qd1 0–0+=) 25...0–0= 26.Qc3 (26.Qd7 Rf7 27.Bc3 Qa3=) 26...Bb4 (26...Qc3 27.Bc3 Nc6 28.Rb1=+) 27.Qb2 (27.Qd3 Nc6=) 27...Nf7 28.Ne6 Re8 (28...Ba3 29.Qa2 Ra8 30.Rb1=+) 29.Nd4 (29.Ng7!? Re5 30.Rb1=) 29...Ne5 30.Qc2 Nc4 31.Nb3 Qa6 32.Bc3 ½–½. sirgeshdb – Magister01 (1690), lichess.org, 2020.

4.Bb2 d5

5.c4 c6 6.Nf3 f6 (6...cb5!? 7.cb5 Nf6=) 7.Nc3+= g5 (7...Nc7 8.d4+=) 8.bc6+/– bc6 9.cd5 cd5 10.Qb3 (10.Bb5 Kf7+/–) 10...d4 (10...Nc7 11.Bb5 Bd7 12.Rc1+=) 11.Nd4 (11.Bb5 Bd7 12.Qe6 dc3 13.Bd7 Qd7 14.Qd7 Kd7 15.Bc3 g4+/–) 11...Nd4 12.ed4 Qd4 13.Be2 Kd8?? (better is 13...a5+/–) 14.Bf3+– Qe5 15.Ne4 (better is 15.Ne2 Rb8 16.Be5 Rb3 17.ab3 fe5 18.Ra7+–) 15...Qb8 (15...Be6 16.Be5 Bb3 17.Ng5 Bc4 18.Ba8 fe5+–) 16.Qd5 Bd7 17.Nc5 Qc8 18.Ne6 1–0. Taulien,Hans_Juergen – Kirstein,Michael, remoteschach.de, 2001.

5.c4 d4 6.a4 c5 7.Nf3 de3 8.fe3 Nf6 9.Be2 g6 10.0–0 Bg7 11.d4 0–0 12.d5 Nc7 13.Nbd2 (13.Be5 Bf5+=) 13...Nce8 (better 13...Nfd5!? 14.cd5 Bb2=+) 14.Qc2 Bg4 (14...Bf5!? 15.Qb3 e6+=) 15.e4+– Bf3 16.Bf3 Nd7 17.Bg7 Kg7 18.Qc3 f6 19.Bg4 Ne5 20.Be6 Nd6 21.Rae1 b6 22.Rf4 a6 23.Ra1 ab5 24.ab5 (24.cb5!? c4 25.Rh4=) 24...Ra1=+ 25.Qa1 Qa8 26.Rf1 Qa1 27.Ra1 Rb8 (better 27...Ndc4!? 28.Nc4 Nc4=+) 28.Ra4+= f5 29.ef5 gf5 30.Kf2 Kf6 31.Ke3 Ng4 32.Kf4 Nh2 33.Ra3 Ng4 34.Rh3 (34.Bf5 e5 35.Kg4 Rg8 36.Kh4 Kf5 37.Rf3 Kg6 38.Rg3 Kf7 39.Rg8 Kg8=) 34...Kg6 35.Bf5 Nf5 36.Kg4 Nd4 (36...e6!?=) 37.Re3 Kf7 38.Kf4 Kf6 (38...Rf8 39.Nf3 Kg6 40.Ke4 Nf3 41.gf3+– (41.Rf3 Rf3 42.gf3 h5–+)) 39.Ne4 (39.Nf3!? Re8 40.Re5+–) 39...Kg6+= 40.Ke5 Rf8 Threatening mate: Rf5 41.Ng3 (41.Rg3 Kh5 42.Nc3 Rf2+–) 41...h5 (41...Rf2 42.d6 Rf6 43.de7 Re6 44.Kf4 Re3 45.Ke3 Kf7+=) 42.Ke4 (42.Ne2 Rf5 43.Ke4 e5+=) 42...h4 (better 42...Rf2!? 43.Kd3 Rg2–/+) 43.Ne2+= Nf5 44.Rf3 (better 44.Nf4 Kh6 45.Rf3=) 44...Nd6–+ 45.Ke3 (better 45.Kd3 Rf3 46.gf3–+) 45...Ra8?? (better 45...Nc4!? 46.Kf2 Rf3 47.Kf3 Kf5–+) 46.Nf4 (46.Kd3 Ra4 47.Re3 Kf6 (47...Rc4? 48.Re7 Rb4 49.Re6 Kf5 50.Rd6 Rb5 51.Rh6+–; 47...Nc4?! 48.Re7 Kf5 49.Nc3=) 48.Rf3 Kg5=+) 46...Kf5 (46...Kh6!?–/+) 47.Nd3=+ Kg5 48.Ne5 Ra3 49.Kf2 Ne4 (49...Ra2!? 50.Kg1 Re2 51.Nf7 Nf7 52.Rf7 Re4=+) 50.Ke2= Ra2 51.Kd3 (51.Ke3 Nf6=) 51...Nf6 (51...Nf2!? 52.Ke3 Nd1 53.Kd3 Rg2–/+) 52.Nf7 Kg4 (52...Kh5 53.d6 Ra3 54.Ke2 Rf3 55.Kf3 ed6 56.Nd6=) 53.Ne5 (53.d6 Ra3 54.Ke2 Ra2 55.Kd1 Ra1 (55...Rg2? 56.Ne5 Kh5 57.de7 Rg1 58.Ke2 Rg2 59.Kf1+–) 56.Kc2 Ra2 57.Kb3 Rg2 58.Ne5 Kg5 59.de7 Re2 60.Rf6 Re5=) 53...Kg5= 54.Ke3 (54.Nc6 Rg2 55.Ne7 Rg3=) 54...Ra3 55.Nd3?? (55.Ke2 Ra2 56.Kf1 Ne4=) 55...Ng4?? (better 55...Rc3!?–+) 56.Kd2 (better 56.Ke4 Rc3 57.Rf5 Kh6 58.Ne5 Ne5 59.Re5 Rc4 60.Kf3=+) 56...h3?? (better 56...Ra2 57.Kd1 Rg2–+) 57.Rh3 (better 57.gh3 Nh6 58.Rg3 Kf6 59.Re3+–) 57...Nf2?? (better 57...Ra2 58.Kc3 Rg2+–) 58.Nf2+– Ra2 59.Ke3 Ra3 60.Nd3 (better 60.Ke4 Ra2 61.Rg3 Kh4+–) 60...Ra4 (60...Rc3 61.Rh7 Rc4 62.Re7+–) 61.Rg3 (61.Ne5 Ra1 62.Nd7 e6 63.Nb6 ed5 64.Nd5 Re1 65.Kf3 Rf1 66.Ke4 Rf2 67.Rg3 Kh6+–) 61...Kf6 (61...Kh4 62.Rg6 Rc4 63.Rb6+–) 62.Rf3 Kg7 63.Rf4 e6 (63...Ra2 64.Ne5+–) 64.Re4 (better 64.de6 Ra7+–) 64...ed5 65.Re7 (better 65.cd5 Ra2+–) 65...Kf6 66.Re5 (better 66.Rb7 Rc4 67.Rb6 Ke7+–) 66...Ra3? (66...dc4 67.Nc5 bc5 68.Rc5 Ke6+–) 67.Rd5 Ra1 (67...Ke7 68.Ke4+–) 68.Re5 (68.Rd6 Kf5+–) 68...Rf1 (68...Ra4 69.Re4+–) 69.Re4 (better 69.Re8 Rg1 70.Rb8 Rg2 71.Rb6 Kf5 72.Nc5 Rg4+–) 69...Kf7 (69...Rg1+–) 70.Rf4 Rf4 71.Nf4 Kf6 72.Nd5 Ke5 73.Nb6 Kd6 74.Na4 Ke5 75.Nc5 Kd6 76.Nd3 Kc7 77.c5 Kb7 78.Kd4 Ka8 79.Ke5 (79.Ke5 Kb7 80.g4+–; 79.g4 Kb8 80.g5 Kb7 81.g6 Kc8 82.g7 Kb8 83.g8Q Kb7 84.Qf7 Kc8 85.c6 Kb8 86.Qb7) 1–0. BeepBeepImAJeep (2640) – Geck0 (2410), lichess.org, 2016.

5.c4 d4 6.Nf3 g5 (better is 6...de3!? 7.fe3 a6+=) 7.Nd4+/– c5?? (better is 7...Nd4 8.Bd4 Nf6+/–) 8.Ne6+– (8.Ne6 Be6 9.Bh8+–) 1–0. Wall,Bill – Bayaa, internet, 2003.

5.c4 Nf6 6.Nf3 a6 7.a4 (7.ba6 ba6 8.Ne5 Bb7+=) 7...ab5= 8.ab5 Ra1 9.Ba1 c6 10.Be2 Qa5 11.Nc3 dc4 12.Bc4 g6 13.0–0 Bg7 14.Qb3 0–0 15.Bb2 Nc5 (15...cb5 16.Bb5 Nc5 17.Qa3+=) 16.Qc2 (16.Qa3!? Qa3 17.Ba3+–) 16...Bf5+= 17.Qd1?? (better 17.d3+=) 17...Qb4–+ 18.d4 (18.e4 Bg4 19.bc6 bc6 20.Qc2 Qc4 21.Ne5–+) 18...Ncd7 (better 18...Qb2 19.Qa1 Qb4–+) 19.Qb3 Qb3 20.Bb3 c5 21.Na4 cd4 22.Nd4 (worse 22.Bd4 Bd3–/+) 22...Be4 23.Rc1 Ra8 (23...Rd8 24.f3 Bh6 25.Kf2+=) 24.h3 (24.Rc7 e5 25.Nf3 h6+–) 24...Bf8 (better 24...Bd5!? 25.Nc3 Bb3 26.Nb3 Ne8=) 25.Rc7+– Ne5 (25...e5 26.Nc3 Bd6 27.Rd7 Nd7 28.Ne4 Ba3=) 26.Ne6!+– fe6 27.Be5 Bd5 (better 27...Kf7+–) 28.Bd5 (better 28.Nb6 Ra7 29.Nd5 Nd5 30.b6+–) 28...Nd5+= 29.Nb6?? (better 29.Rc4+=) 29...Nb6 (better 29...Nc7!? 30.Bc7 Ra5–+) 30.Rb7 Nd5 (30...Nc4 31.Rb8 Ra2 32.Bd4–+) 31.Bd4 White prepares b6 (31.b6 Bg7 32.Bg7 Kg7=+) 31...Ra2 (31...Bg7 32.Bg7 Kg7 33.Kh2–/+) 32.g3 (32.b6 Ra5 33.Rd7 Rb5=+) 32...Rc2 (better 32...Bg7!?–/+) 33.b6=+ Rc1 34.Kg2 Rb1 35.Rb8 (35.e4 e5 36.Bc5 Nc3=+) 35...Kf7 (35...e5 36.Bc5 Kf7 37.Rb7–+) 36.b7? (better 36.e4!? e5 37.Be5–/+) 36...Bg7 37.Ba7? (better 37.Bg7 Kg7 38.e4–+) 37...Be5 38.Rc8 Rb7 39.Bd4 (39.Bc5 Rb3 40.Rd8 h5–+) 39...Bd4 40.ed4 Rb4 41.Rh8 Rd4 42.Rh7 Kf6 43.Rh8 Rd1 44.Rb8 Rd2 45.Rb2 (45.Kf3–+) 45...Rb2 46.Kf3 Nc3 47.h4 Ke5 48.Ke3 Ne4 (48...Nd1 49.Kd3 Rf2 50.Kc4–+) 49.f3 (49.f4 Kd5 50.g4 Rb3 51.Ke2 e5 52.fe5 Kd4 53.Ke1 Ke3 54.Kf1 Kf3 55.Kg1 Rb1 56.Kh2 Nf2 57.h5 Rh1) 49...Rg2 (49...Rb3 50.Ke2 Ng3 51.Kd1 Rf3 52.Kd2 Ne4 53.Kc2 Kd4 54.h5 gh5 55.Kb2 h4 56.Kc2 h3 57.Kb2 h2 58.Kc2 h1Q 59.Kb2 Qg2 60.Kc1 Rf1) 50.f4 (50.fe4 Rg3 51.Kd2 Rh3 52.Ke1 Rh4 53.Ke2 Ke4 54.Kd2 Rh3 55.Kc2 g5 56.Kc1 Kd3 57.Kb1 Kc3 58.Ka2 Rh2 59.Kb1 Rh1 60.Ka2 g4 61.Ka3 Ra1) 50...Kf5 51.Kf3 Rg3 52.Ke2 Kf4 53.h5 (53.Ke1 Rg2 54.Kd1 Ke3 55.Kc1 Nc3 56.h5 Kd3 57.hg6 Rc2) 53...Rh3 (53...gh5 54.Ke1 Rd3 55.Ke2 Rd2 56.Kf1 Kf3 57.Kg1 e5 58.Kh1 Ng3 59.Kg1 Rg2) 54.h6 Rh6 55.Kd3 Rh5 56.Kd4 Rh3 (56...Rc5 57.Kd3 Kf3 58.Kd4 e5 59.Kd3 Rc3) 57.Kc4–+ ½–½. BeepBeepImAJeep (2445) – Gilevich (2310), lichess.org, 2017.

5.d4 Bd7 6.Nf3 c5 (6...c6 7.c4=) 7.c4 (7.dc5 Nf6+=) 7...dc4 (7...Nf6 8.dc5 dc4 9.Bc4 Nc5 10.0–0+=) 8.Bc4 Qb6 (8...cd4 9.Nd4 Nd4 10.Bd4+=) 9.a4 a5 (9...cd4!? 10.Ne5 0–0–0+=) 10.Ne5+/– Rd8 (10...Nf6 11.Nd7 Nd7 12.d5+/–) 11.Qb3 (11.Qf3 Nf6+–) 11...Nh6 12.d5 (12.Nd7 Kd7 13.d5 Ng5+/–) 12...Ng5 (12...Nc7 13.0–0+/–) 13.h4 (13.Nd7 Rd7 14.Nc3 e6+/–) 13...Ne4 14.Nc3 Nd6 15.e4 Nc4 16.Nc4 Qg6 17.Na5 (17.Rg1 b6+=) 17...b6 (17...Qg2 18.Rf1 Bh3 19.Kd2–/+) 18.Nc4 (better is 18.Nc6!? Qg2 19.Rf1+=) 18...Qg2= 19.0–0–0 Rb8 (19...Qf2 20.Nb6 Bg4 21.Rd2=) 20.Ne5 (20.Qc2 Bg4 21.Rde1+=) 20...g6 (20...Qf2 21.Nd7 Qe3 22.Kb1 Kd7=) 21.Nd7 (21.Qc2 Ng4 22.Rdg1 Bh6 23.Kb1 Qh1 24.Rh1 Ne5+–) 21...Kd7 22.Ne2 (22.d6 e5+= (22...Qf2?? 23.de7 Ke8 24.Nd5 Be7 25.Bh8 Bh4 26.Qc3+–)) 22...Rg8+= 23.Qc4 (23.Qg3 Qg3 24.fg3 Ra8=) 23...Ng4 (23...Qf2 24.Rd2+=) 24.e5 (24.Rhg1!? Qh3 25.f4=) 24...Nf2+= 25.e6 Kd6?? (better is 25...fe6 26.de6 Ke8+=) 26.Qf4 1–0. Zylla,Johannes – Haferlach, BSF–VM C–Turnier, 1995.

5.d4 Nf6 6.c4 =.

5.Be2 Nf6 6.g4 (6.Nf3 Nc5+=) 6...g5 (6...d4 7.Na3=) 7.Nf3 Bd7 (7...h5 8.gh5 Bg7 9.h4 Nh5 10.Bg7 Nhg7 11.d4=) 8.Ne5 (8.h4!? Bg7 9.hg5+–) 8...Bg7= 9.Nd7 (9.h4 gh4 10.Rh4 Ne4=) 9...Qd7 10.0–0 (10.h4 gh4 11.d4 h3=) 10...0–0 (10...h5 11.gh5 Nh5 12.d4–/+) 11.f4 gf4 12.ef4 h6 13.g5 (better 13.f5!? Ng5 14.Be5=) 13...hg5–/+ 14.fg5 Ng5 15.Qe1 Nfe4 16.d3?? (better 16.Bg7 Kg7 17.d3–/+) 16...Nh3 (better 16...Bb2 17.de4 Ba1 18.Qg3–+) 17.Kh1 (17.Kg2 Bb2 18.de4 Ba1 19.Qg3 Bg7 20.ed5 Qd5 21.Kh3 Qa2–+) 17...Bb2 18.de4 Ba1 19.Qg3 Kh8 (better 19...Bg7 20.Bg4 e6–+) 20.Rg1?? (20.Qh4 Kg7 21.Qg3 Kh7 22.Qh4 Kg7 23.Qg3 Kh7 24.Qh4 Kg7=) 20...Bf6 (20...Ng1 21.Qh4 Kg8 22.Kg1–+) 21.e5 (21.Rg2 Rg8 22.Qe3 Rg2 23.Qh6 Kg8 24.Kg2–+) 21...Rg8 (21...Ng1?! 22.ef6 ef6 23.Qh4 Kg8 24.Qg3 Kh7 25.Qh4 Kg7 26.Qg3 Kh6 27.Qh4 Kg6 28.Qg3 Kh7 29.Qh4 Kg7 30.Qg3 Kh7=) 22.Qe3 (22.Bg4 Qg4 23.Qg4 Nf2 24.Kg2 Rg4 25.Kf2 Bh4 26.Rg3–+) 22...Rg1 23.Qg1 Ng1 24.Kg1 (24.Bd3 Qg4 25.Bf1 Nf3 26.Bg2 Rg8 27.Bf3 Qf3) 24...Rg8 25.Kf2 (25.Bg4 Qg4 26.Kf2 Qe4 27.Kf1 Qe3 28.ef6 Rg1) 25...Qh3 (25...Qf5 26.Bf3 Qc2 27.Be2 Bh4 28.Ke3 d4 29.Kf4 Qe2 30.h3 Bg3 31.Kf5 Qe5) 26.Ke1 Bh4 (26...Rg1 27.Kf2 Qh2 28.Ke3 Qe5 29.Kd2 Qf4 30.Kd3 Qd4) 27.Kd2 Qh2 (27...Rg1 28.c4 Bg5 29.Kc2 Rb1 30.Bf3 Qf5 31.Kc3 Qf3 32.Kd4 Rd1 33.Kc5 Qa3) 28.Nc3 Qe5 (28...Qf4 29.Kd1 Rg1 30.Bf1 Qf1 31.Kd2 Bg5) 29.b6 (29.Nd1 Rg2 30.Kc1 Qe2 31.Ne3 Qe3 32.Kb1 Qa3 33.b6 Rg1) 29...Bg5 30.Kd1 (30.Ke1 Qg3 31.Kf1 Be3 32.ba7 Qf2) 30...Qc3 31.bc7 (31.ba7 Qd2) 31…Qd2 0–1. anotherheaven (1815) – Xeibi (2160), lichess.org, 2015.

5.Nf3 a6 6.ba6 ba6 7.c4 Nf6 (7...c6 8.Be5+=) 8.Ne5 Bb7 9.d4 (better is 9.Qa4 Nd7 10.Nc6 Bc6 11.Qc6 dc4 12.Bc4+/–) 9...Nd7? (better is 9...Rb8!?+=) 10.cd5+– Bd5 11.Nf7! Kf7 (12.Qh5 g6 13.Qd5 Nf6 14.Qd8 Nd8+– (< 14...Rd8 15.Ba6 c5 16.Bc4+–)). pcmvr (2225) – dennism (2195), net–chess.com, 2006.

5.Nf3 Nc5 6.c4 dc4 7.Bc4 Nd3 8.Bd3 Qd3 9.Nc3=.

5.Nf3 Nc5 6.c4 Nf6 7.cd5 Qd5 8.d4+– Nce4 9.Qc2 (9.Ne5 e6 10.a3+–) 9...Bd7? (better 9...Bf5!? 10.Bd3 e6+–) 10.Ne5+– Bb5 (10...Bf5!? 11.Bd3 e6+–) 11.f3 Nd6?? (11...Bf1 12.fe4 Ne4 13.Rf1 f6+–) 12.Nc3 Qe6 13.Nb5 Nb5 14.Bb5 c6 15.Nc6! Rc8 (15...bc6 16.Bc6 Double attack) 16.Na5 Kd8 17.Nb7 1–0. Janek – Freeday, internet, 2018.

5.Nf3 Nc5 6.c4 Bg4 7.d4 Ne4 8.c5 (8.cd5 e6 9.de6 Bb4 10.Ke2 Be6=) 8...e6 9.h3 Bf3 (9...Bh5 10.Nc3=) 10.gf3 Ng5?? (better 10...Nef6=) 11.h4+– Ne4 (11...Nf3 12.Qf3 Be7 13.h5+–) 12.fe4 de4 13.Nc3 Qf6 (13...Ne7 14.Ne4 Nd5 15.Qf3+–) 14.Ne4 Qf5 (14...Qd8 15.Qf3 Qd7 16.Bd3+–) 15.Bd3 0–0–0 (15...Kd8+–) 16.Nd6! cd6 (16...cd6 17.Bf5 Discovered attack; 16...Bd6 17.Bf5 Discovered attack) 17.Bf5 dc5 (17...ef5 18.Qa4 Kb8 19.b6+–) 18.Be4 (better 18.Bd3 Nf6+–) 18...b6 (18...Nf6 19.Bg2 Rg8 20.Qc2+–) 19.Qa4 Kb8 20.dc5 Bc5 21.Qa6 Rd7 (21...Bb4 22.Kf1 Rd1 23.Rd1 Nf6 24.Qb7) 22.Be5 Bd6 23.Bd6 Rd6 (23...Rc7 24.Qb7) 24.Qb7 1–0. DEFFM – GuestIDXY, freechess.org, 2018.

5.Nf3 Nc5 6.Be2 Bg4=.

5.Nf3 Bd7 6.a4 a6 (6...Nf6 7.Be2+=) 7.c4 ab5 (7...dc4 8.Bc4 ab5 9.ab5 Ra1 10.Ba1+=) 8.cb5 (8.cd5 Nc5 9.ab5 Ra1 10.Ba1 Bf5+/–) 8...Nc5 (8...Nf6 9.Be2+=) 9.Nc3 (9.a5 Nf6+=) 9...Bg4 (9...Nf6 10.Qc2=) 10.d4 Ne4 11.Bd3 Nc3 (11...Ngf6 12.a5+=) 12.Bc3 e6 13.0–0 (13.a5 Nf6+=) 13...Nf6= 14.h3 (14.a5=) 14...Bf3 (14...Bh5!?=) 15.Qf3+= (15.gf3?! Bd6=) 15...b6 (15...Bd6 16.a5+=) 16.Rfc1 (16.a5 ba5 17.Ba5 Bd6+/–) 16...Be7 (16...Bd6 17.a5+=) 17.Qd1 (17.Bd2 Bd6+=) 17...0–0+= 18.Qc2 (18.a5 ba5 19.Ba5 Ra7+=) 18...g6 (18...Bd6 19.a5+=) 19.Bb2 (19.a5 Qd7+/–) 19...Nh5 (19...Bd6!?+/–) 20.Qc7+– Bd6 (20...Nf6+–) 21.Qd8 Rfd8 22.Rc6 Rab8 23.a5 ba5 24.Ra5 Bb4 (24...Nf6 25.Raa6 Bf8 26.Kf1+–) 25.Raa6 (25.Ra4 Bd6+–) 25...Nf6 26.Rc7 (better is 26.Ba3 Ba3 27.Ra3+–) 26...Nd7? (better is 26...Rd7 27.Rc2 Rdb7+–) 27.Raa7 Nb6 (27...Nf6 28.Rf7 Ra8 29.Rg7 (29.Rf6 Ra7 30.Bb1 Rd6+=) 29...Kh8 30.f3+–) 28.Rf7 Bf8 29.Rh7 Ra8 (29...Nc8 30.Rac7+–) 30.Rhc7 (better is 30.Bg6!? Rdb8 31.e4 Nc4 32.ed5 Ra7 33.Ra7 Rb5+–) 30...Ra7 31.Ra7 Nc8 (31...Nc4 32.Bc1 Rc8 33.Kf1+–) 32.Rb7 (better is 32.Ra8 Be7 33.Bg6 Nd6 34.Rd8 Bd8+–) 32...Nd6 33.Rc7 (33.Rb6 Kf7+–) 33...Rb8 34.Ba3 (better is 34.Rc6 Nc4 35.Bc1 Rb5+–) 34...Nb5 35.Bb5 Ba3 36.Bd7?? (better is 36.Bd3 g5 37.Ra7+–) 36...Bd6?? (better is 36...Rb1 37.Kh2 Bd6 38.g3 Bc7 39.Be6 Kf8 40.Bd5 Ba5+=) 37.Rc8 (better is 37.Be6!? Kh8 38.Rc8 Rc8 39.Bc8 Kg7+–) 37...Rc8 (37...Kf7 38.Rb8 Bb8 39.f4+–) 38.Bc8 (better is 38.Be6 Kf8 39.Bc8+–) 38...Kf8?? (38...Kf7+–) 39.Be6 Ke7 40.Bd5 (40.Bd5 Kd8 41.f4+–) 1–0. Figiel – Edgar, internet, 2000.

5.Nf3 Bd7 6.c4 dc4 7.Bc4 Nf6 8.Nc3 Nc5 9.d4 Nce4 10.0–0 Nc3 11.Bc3 e6 12.Qb3 a6 13.a4 ab5 14.ab5 Ra1 15.Ra1 Ne4 16.Bb4 Bb4 17.Qb4 Qe7?? (better is 17...Nd6+/–) 18.Ra8+– (18.Ra8 Qd8 19.Rd8 Kd8 20.Ne5+–) 1–0. Fournier,Frederic – De Vallee,Arnaud, Partie Libre, 1996.

5.Nf3 Bd7 6.Be2 Nc5 +=.

5.Nf3 Nf6 6.c4 c6 7.Nc3 d4 8.Nd4 Nd4 9.ed4 Qd4 10.Be2 Bf5 (10...Rb8 11.Rb1=) 11.Qb3 (11.Nd5 Qb2 12.Nc7 Kd7 13.Na8 e6–/+) 11...Qh4 (11...Qd7 12.d4=) 12.0–0 (12.bc6 bc6 13.Qb7 Rc8+–) 12...e6 (better 12...Rc8!?+=) 13.bc6+– bc6 14.Qb7 Rd8 15.Qc6 Nd7 16.Nb5 Be7?? (better 16...Be4 17.Qa6 Rb8+–) 17.Bg7 (17.Bg7 Bf6 18.Nd6 Ke7 19.Bh8 Bh8 20.Nf5 ef5 21.Rad1+–; 17.Na7?! 0–0 18.d4 Nf6+–) 1–0. onur604 (2320) – PrinceDetritus (2355), lichess.org, 2020.

5.Nf3 Nf6 6.Be2 a6 7.ba6 ba6 8.Nc3 c6 9.Rb1 Rb8 10.0–0 Bd7 (10...c5!?+=) 11.Ba6+/– Qa5 12.Be2 Nc5 13.Ne5 Nfe4? (better is 13...e6!?+/–) 14.Ne4+– (14.Nd7?! Nd7 15.Ne4 de4+–) 14...Ne4 15.Bh5 (15.Nd7?! Kd7 16.Be5 Rb1 17.Qb1 Ke6+/–) 15...g6 (15...Nd6 16.Bc3 (worse is 16.Nd7 Kd7 17.Bc3 Rb1 18.Qb1 Qb5+–) 16...Qc7 17.Qf3+–) 16.Nd7 Rg8 (16...Rb2 17.Rb2 Bg7+–) 17.Nb8 gh5 18.d3 Nd2 19.Nc6 Qa4 20.Ne7 (20.Qd2?! Rg2 21.Kh1 Rh2 22.Kh2 Qh4 23.Kg2 Qg5 24.Kh1 Qh4 25.Kg1 Qg5 26.Kh2 Qh4 27.Kg1 Qg5 28.Kh2 Qh4=) 20...Be7 21.Qd2 (better is 21.c4 Qa5 22.Bd4 (worse is 22.Qh5 Nb1 23.Qh7 Rf8+–) 22...Nb1 23.Qb1 dc4 24.dc4+–) 21...Qg4?? (better is 21...Rg2! 22.Kh1 Rh2 23.Kh2 Qh4 24.Kg2 Qg4 25.Kh1 Qh4 26.Kg1 Qg5 27.Kh2 Qh4 28.Kg1 Qg5 29.Kh2 Qh4=) 22.f3+– Qh4 (22...Qd7 23.Bd4 Qc7 24.Rb5+–) 23.Be5 Bd8 24.Rb8 Qg5 25.Bf4 (25.f4 Qg4 26.c4 Qg6+–) 25...Qe7 (25...Qg6 26.c4+–) 26.Qa5 Rg6 27.Bc7 Kd7 28.Bd8 Qg5 29.Qc7 Ke6 30.Qc6 Ke5 31.d4 Kf5 32.Qd5 1–0. b4_player (2225) – kaisa (1620), GameColony.com, 2003.

4.Bb2 f6

5.Nc3 c6 6.Nf3 Qa5 7.a3 Nc5 8.Be2 e5 9.0–0 Na4 10.Na4 Qa4 11.bc6 Qc6 12.e4 Qe4 13.d4 d6 (13...ed4 14.Nd4 Qd5 15.Re1+/–) 14.de5 de5?? (better is 14...Qc6 15.Nd4 Qc5+–) 15.Bb5+– Kf7 (15...Ke7 16.Re1 Qf5 17.Ne5 fe5 18.Re5 Qe5 19.Be5+–) 16.Re1 Qf5 (16...Qg4 17.h3 Qe6 18.Re5 fe5 19.Ng5 Ke7 20.Ne6 Be6 21.Qf3+–) 17.Bc4 Be6 (17...Ke7 18.Ne5! fe5 19.Re5 Qe5 20.Be5+–) 18.Nh4 Qg4 (18...Qf2 19.Kf2 Bc5 20.Kg3 Bc4+–) 19.Qg4 Bc4 20.Qc4 Ke7 21.Be5! Ke8 (21...fe5 22.Re5) 22.Bd6 Ne7 (22...Be7 23.Re7! Ne7 24.Qe6 Kf8 25.Qe7 Kg8 26.Qe6) 23.Qc7 Rd8 (23...Kf7 24.Re7 Be7 25.Qe7 Kg8 26.Qe6) 24.Re7 Be7 25.Qe7 1–0. MT – guest1045, ICC, 2004.

5.c4 c5 6.Nf3 d6 7.a4 a5 (7...g5 8.Be2+–) 8.Nc3 b6 (8...g5 9.Bd3+–) 9.Bd3 Ra7 10.Qc2 g6 11.0–0 Bg7 12.Be4 h5? (better 12...Nh6!?+–) 13.Bg6+– Kf8 (13...Kd7 14.Bf5 Ke8 15.Nd5+–) 14.Nd5 Bd7 (14...h4 15.Bf5+–) 15.Nh4 Ng5 (15...Rh6 16.f4+–) 16.f4 Ne6 (16...Nf7 17.Bh7 Ke8 18.Qg6+–) 17.Bf5 (better 17.Bh7 Be8 18.d4+–) 17...Nc7 (17...Kf7+–) 18.Ng6 Kf7 19.Nh8 Bh8 20.Nb6 e6 (20...Be8 21.Nd5 Nd5 22.cd5+–) 21.Bg6 Kg7 22.Nd7 Qd7 23.f5 (better 23.b6 Rb7 24.bc7 h4+–) 23...Ne7 (23...Rb7+–) 24.Bf6! Kf6 (24...Kh6 25.Bh8 Qc8+–) 25.fe6 Ke6 26.Qe4 Be5 27.Bf7 1–0. GuestXCFJ – GuestPQPT, freechess.org, 2017.

5.c4 Nc5 6.Qh5 g6 7.Qc5 e6 8.Qd4 e5 9.Qh4 Be7 10.Nc3 c6 (10...d6 11.d4+–) 11.Rb1 f5 (11...cb5 12.Nb5 d6 13.Nc3+–) 12.Qg3 d6 13.c5! f4 (13...dc5 14.Qe5 Deflection) 14.ef4 ef4 (14...Bf5 15.Rc1 ef4 16.Qf4+–) 15.Qf4 Nf6 16.Ne4 0–0 (16...Ne4 17.Bh8 Bf5 18.bc6 Bg5+–) 17.cd6 Ne4 (17...Bf5 18.Bc4 Kg7+–) 18.Bc4 (18.Bc4 Be6 19.Be6 Rf7 20.Qf7) 1–0. Janek – bitsky, internet, 2017.

5.c4 d5 6.a4 dc4 7.Bc4 c6 8.Nf3 cb5 9.ab5 g6 (9...Nc7 10.0–0+–) 10.Qb3 Qd6 11.Ba3 Qb6? (better 11...Qd7+–) 12.Nc3+– Nh6 (12...Bg7+–) 13.Nd5 (better 13.Na4 Qc7 14.Be6 Be6 15.Qe6+–) 13...Qd8 14.Nf6! ef6 15.Bf8?? (better 15.Be6 Qb6 16.Bc8 Rc8 17.Bf8 Kf8 18.Nd4+–) 15...Nf8–/+ 16.b6 a6 17.Bb5 (17.0–0!?–/+) 17...Bd7 18.Bd7 Qd7 (18...Nd7 19.0–0–+) 19.0–0 Ne6 20.Rfc1 0–0 (20...Nf7!?–/+) 21.Rc7=+ Qd6 22.Nd4 Rfe8 23.Rb7 Kf8 (23...a5!?=) 24.Ne6 Qe6 25.Qe6 (25.Qb4 Kg8+=) 25...Re6= 26.Rh7 (better 26.Rc1 Re7 27.Re7 Ke7 28.Rc7 Kd6 29.Rh7=) 26...Ng8?? (better 26...Nf7–/+) 27.Ra7 (better 27.b7!? Rb8 28.Rc1+–) 27...Rb8= 28.b7 Attacks the isolani on a6 28...Re7 (28...Rb6 29.Kf1=) 29.R1a6 (29.Rb1 Kf7+=) 29...Reb7 30.Rb7 Rb7 The mate threat is Rb1 31.g3 Rb1 32.Kg2 Kg7 33.d4 Kh6 34.h3 f5 35.g4 Ne7 36.Re6 fg4?? (better 36...Rb7+=) 37.Re7+– gh3 38.Kh3 Rh1 39.Kg3 Rh5 (39...g5 40.e4+–) 40.Kf3 (40.e4 Rh1+–) 40...Rg5 (40...Rf5 41.Ke2+–) 41.Ke2 Rf5 42.Re5 Rg5 (42...Rf8+–) 43.Rg5 Kg5 44.e4 Kf6 45.e5 Ke6 46.Ke3 Kd5 47.f4 g5 48.f5 (better 48.fg5 Ke6 49.Ke4 Kd7+–) 48...g4 49.f6 g3 50.Kf3 (better 50.f7 g2 51.Kf2 Kd4+–) 50...g2 51.Kg2 (51.Kg2 Kd4 52.f7 Ke5 53.f8Q+–) 1–0. RichardSommer (2055) – Trevorrivaldo (2060), lichess.org, 2020.

5.Qh5 g6 6.Qd1 Ng7 1–0. DEFFM – GuestFFPK, freechess.org, 2016.

4.Bb2 Nf6

5.a4 b6 6.a5+= Nc5 7.a6 (7.Nf3 e6+=) 7...e5 (7...d5 8.Nf3=) 8.g3 (8.Be5 Be7+=) 8...d6 (8...e4!?=) 9.Bg2+= Rb8 10.Qf3?? (10.Nc3!?+=) 10...Bd7 (better 10...Bg4!? 11.Qc6 Bd7–/+) 11.Qe2 (11.Nc3 Be7=) 11...Be7 (better 11...e4=+) 12.c4?? (better 12.d4 ed4 13.ed4+=) 12...0–0 (12...e4 13.Ra3–+) 13.Ba3 (13.e4 Bg4 14.f3–/+) 13...e4 (13...Bg4 14.Bf3 Bf5 15.Bc5 dc5 16.e4–/+) 14.Nc3? (better 14.Bc5 bc5 15.Nc3–/+) 14...Nd3–+ 15.Kf1 c5?? (15...Bg4!? 16.f3 Be6 17.Qd1 Bc4 18.Nge2 ef3 19.Bf3–+) 16.Nh3?? (16.Ne4 Nb4 17.Bb4 cb4 18.Nf6 Bf6+–) 16...Bh3 (better 16...Be6 17.Ne4 Bc4–+) 17.Bh3=+ Ne5 (better 17...d5!? 18.cd5 Nd5 19.Ne4 c4=+) 18.Kg2 (better 18.Bg2+=) 18...Nfd7? (18...g6 19.Rhd1+=) 19.Nd5?? (19.Ne4 Nf6 20.Nf6 Bf6+–) 19...Bf6? (19...f5 20.Rhf1=) 20.Nf6?? (better 20.Bf5+–) 20...Nf6=+ 21.Bb2 Nd3 22.Bf6 Qf6 23.Rhf1 (23.f3 Qf3 24.Qf3 ef3 25.Kf3 Ne5 26.Ke2 Nc4=+) 23...Nb4 (23...Ne5!?=+) 24.f3= ef3 25.Qf3 Qb2 26.Rfd1 Nd3 (26...Qb3 27.Qe2=) 27.Kh1 (27.Bf5 Nb4=) 27...Rbe8 (27...Qc2 28.Bf1 Qc4 29.Ra3–/+) 28.Bg2 (28.Bf5 Nb4=) 28...Ne5 (28...Qc2!?=+) 29.Qd5+= Qb4 30.Rac1 Rd8 (30...Re6 31.Qb7 Nd3 32.Rb1 Qc4 33.Bd5+=) 31.d4 (31.Rf1 g6+=) 31...cd4 (31...Ng4!? 32.Qf3 Nf6=) 32.ed4+= Ng6? (better 32...Ng4 33.Qf3 h5+=) 33.Rb1 (33.Qb7 Ra8 34.Bd5 Kh8+–) 33...Qa3 (33...Qa5 34.Qb7 Ra8 35.Bd5+–) 34.Qb7 Ra8 35.Qd7 (better 35.Bd5 Rae8 36.Qa7+–) 35...Rad8?? (better 35...Rfd8 36.Qf5 Ne7+–) 36.Qa7+– Rfe8 (36...Qe3 37.Qb6 Ne5 38.Re1+–) 37.Qb6 Rb8 38.Qa7 Rbd8 (38...Qa2 39.Bd5 Rf8 40.Rf1+–) 39.b6 Ne7 (39...Qa4 40.b7 Nf8 41.Qb6+–) 40.b7 Rb8 (40...Nc8 41.bc8B Rc8 42.Rf1+–) 41.Qb6 h6 (41...Nc8 42.bc8Q Rbc8+– (42...Rec8 43.Qc7 Ra8 44.Ba8 Qa6 45.Rb8 Qa8 46.Ra8 Ra8 47.Rb1 g5 48.Qd6 Ra6 49.Qa6 Kg7 50.Rb7 h6 51.Qe6 h5 52.Rf7 Kh8 53.Qe8)) 42.a7 (42.a7 Qa2 43.ab8Q Rb8 44.Qd6+–) 1–0. invictus31 – Dlastboardbender, lichess.org, 2018.

5.a4 g6 6.c4 Bg7 7.Nf3 0–0 8.Be2 c6 9.0–0 Qb6 10.d4 c5 11.Nbd2 (11.d5 Nd8+–) 11...d6 (11...cd4 12.ed4 d5 13.Re1+=) 12.Nb3 White prepares the advance a5 (12.a5 Qd8+–) 12...cd4+= 13.Nfd4 Nc5 14.a5 Qd8 15.Nc5 dc5 16.Nb3 Qc7 (16...Bf5 17.Qd8 Rad8 18.Ra2+=) 17.Bf3 (17.b6!? ab6 18.ab6 Ra1 19.bc7 Rd1 20.Rd1+–) 17...Rb8 18.Qe2 Be6 19.Rfd1 b6 20.a6 Bf5 21.g4 (21.e4 Be6+–) 21...Be4 (better 21...Ng4!? 22.Bg4 Bb2=+) 22.h3 e5 23.Nd2 (23.Be4 Ne4 24.Qd3 Ng5+=) 23...Bf3 24.Qf3 e4 (24...Qe7!?+=) 25.Qg2+– Qe7 26.Rac1 (26.g5 Nh5 27.Bg7 Kg7 28.Ne4 f6+–) 26...Rfd8 (26...Rbe8 27.Bc3=) 27.Bf6 (27.g5 Nd7 28.Bg7 Kg7 29.Ne4 f5 30.gf6 Nf6 31.Nf6 Qf6 32.Rd8 Rd8 33.Qb7 Kg8 34.Qa7 Rf8+–) 27...Bf6 28.Ne4 Bb2 29.Rb1 Bg7 30.Ng3 Re8 31.Qc6 Rec8 (31...Red8 32.Qe4 Qh4 33.Kg2+–) 32.Qd7 (32.Rd7 Qf8 33.Qd6 Qd6 34.Rd6 Rc7+–) 32...Qf6 (better 32...Qh4!? 33.Kg2 Ra8+–) 33.Qa7+– Qc3 (33...Ra8 34.Qb7+–) 34.Rbc1 (34.Ne4 Qc2 35.Nd6 Rf8+–) 34...Qb2 (34...Qf6 35.Rd7 Qf3 36.Rd5+–) 35.Qd7 Qa3 (35...Qf6 36.Rd3+–) 36.Ne4 Bb2 (36...Re8 37.Nd6 Rf8 38.Qc6+–) 37.Ng5 (37.Rc2!? Be5+–) 37...Rf8 38.Rb1 Bf6 39.Ne4 Be5 (39...Bg7 40.Qd3 Qa5 41.g5+–) 40.Qd5 (40.Qd3 Qa2+–) 40...Bg7 (40...Rbe8 41.Qd3 Qa2 42.Rd2+–) 41.g5 (41.Qd3 Qa5+–) 41...Ra8 42.Nf6 (better 42.Qd3 Qa5+–) 42...Kh8 (42...Bf6 43.gf6 Qc3+–) 43.Qf3 Qc3 (43...Rfd8 44.Nd7 Qa5 45.Qb7+–) 44.Qf4 (44.Nd7!? Rg8+–) 44...Bf6 45.Qf6 (45.gf6?! Rfb8+–) 45...Qf6 46.gf6 h5 (46...Rfd8 47.Kf1 Kg8 48.Rd8 Rd8 49.Ke2+–) 47.Rd6 Kh7 (47...Rfb8 48.Rd7+–) 48.h4 (better 48.Rb6 g5+–) 48...Rfe8 49.Rbd1 Re6 (49...Re4 50.Rb6 Rg4 51.Kf1 Rh4+–) 50.Re6 fe6 51.Rd7 Kg8 (51...Kh6 52.a7 g5 53.hg5 Kg5 54.f7+–) 52.a7 Kf8 53.f4 Ke8 54.Rg7 Kf8 55.Kg2 (55.Kg2 Rd8 56.Kf3+–) 1–0. BeepBeepImAJeep – Almshkh (1735), lichess.org, 2018.

5.c4 g6= 6.Nf3 c5 7.d4 cd4 8.ed4 (8.Nd4 Bg7=) 8...d5 9.Ne5 (9.Be2 Nf4 10.0–0 Bg7=) 9...Bg7 10.Be2 Nf4 11.Bf3 dc4 12.0–0 N6d5 A valuable piece 13.Nc4 0–0 14.Ne5 Bf5 (14...Qb6 15.Qb3 Be6 16.Na3+=) 15.Qb3 (15.Nc3 Qd6=) 15...Rc8 16.Rc1 Rc1 17.Bc1 Qb6 18.Na3 (18.Qb2 Nd3 19.Nd3 Bd3 20.Bd5 Qd4 21.Qd4 Bd4–/+) 18...Qd4 (better is 18...Be5!? 19.Bf4 Bd4–+ (worse is 19...Nf4 20.de5 Nd3 21.Rf1–/+; worse is 19...Qd4 20.Be5 Qe5 21.Rd1=)) 19.Bb2+= Qb4 20.Rd1 (20.Qb4 Nb4 21.Bb7 Rd8+=) 20...Qb3–/+ 21.ab3 Rd8 22.g3 Nh3 23.Kf1 Be6 24.Nac4 f6 (24...Ng5 25.Bh1+=) 25.b6 (25.Nc6!? bc6 26.bc6–/+) 25...a6–/+ (25...fe5 Not 26.ba7 Ra8 27.Bd5 Bd5 28.Rd5 Ra7 29.Kg2+=) 26.Nd3 Nb6 27.Nb6 Bb3 28.Rd2 Bh6 29.Bd1 Bc4!? (29...Bd2?! 30.Bb3 Kg7 31.Nd5=) 30.Nc4 Bd2 31.Bc2 (31.Be2 Bh6 32.f4 b5–/+) 31...Bh6 32.f4 b5 (32...g5 33.Kg2 Nf4 34.gf4 gf4 35.Kf3+=) 33.Na5 (33.Ne3 a5+=) 33...g5 (33...Kh8 34.Nb3+=) 34.Kg2 (34.Nc6 Rd7 35.Bb3 Kg7+=) 34...g4 (34...Nf4 35.gf4 gf4 36.Nc6=) 35.Nb7= White gets strong initiative 35...Rb8 (35...Rc8 36.Bb3 Kh8 37.Nbc5=) 36.Nbc5+= Bg7 37.Na6 Rb6 38.Bb3 Kh8 39.Nac5 e5 (39...Rd6 40.Be6 h5 41.Bc3+=) 40.fe5+/– fe5 41.Ne5 h5 42.Ne6 Be5 43.Be5 Kh7 44.Bc2 Kg8 45.Ng7 Rc6 46.Bb3 Kh7 47.Nh5 Kg6 48.Nf4 Kf5 49.Bb8 Nf4 50.Bf4 Ke4 (50...Rc3 51.Bd1+/–) 51.Bd1 b4 (51...Kf5 52.h3 gh3 53.Kh3+/–) 52.Kf2 (52.Bd2!?+–) 52...Rf6+/– 53.Bc2 (53.Ke1 Kd3+/–) 53...Kd4+= 54.Ke1 (54.Kg2 Kc4+=) 54...b3= 55.Bb1 Rc6 56.Kd2 b2 57.Be3 Kd5 58.Kd1 Rc3 59.Bd2 Rc7 60.Be3 Rc6 61.Bf4 Kd4 Active king in the endgame 62.Ba2 (62.Bc2 Rc5 63.Bh6 Rd5=) ½–½. Luzuriaga,Norberto Horacio – Mesquita, Candidatos, 2002.

5.Ne2 a6 6.Ng3 ab5 7.Bb5 c6 8.Be2 g6 9.0–0 Bg7 10.e4 d6 11.d4 Nf4 12.Bf3 0–0 13.e5 (13.c4 Ne6=) 13...de5=+ 14.de5 Qd1 15.Rd1 N6d5 (better 15...Nd7!?–/+) 16.Nd2= Be6 17.Nde4 (17.a3 Rfd8=) 17...Nb4=+ 18.c3? (18.Nc5 Bd5 19.Bd5 cd5=) 18...Nc2 (18...Nbd3!? 19.Bc1 Nc1 20.Rdc1 Ba2–+) 19.Rac1 Na3 20.Ba3 Ra3 21.Nc5 b6 (21...Be5!? 22.Nb7 Bd5 (worse 22...Rc3 23.Rc3 Bc3 24.Ne4–/+) 23.Bd5 cd5–+) 22.Ne6=+ fe6 23.Bc6 Ra2 24.Rd7 Be5 25.Re7 (25.c4!?=+) 25...Bc3–/+ 26.Rb7? (26.Rc3 Deflection from a1 26...Ra1) 26...Bd4–+ 27.Bd7 (27.Rf1 Bf2! 28.Kh1 Bd4–+) 27...Bf2 (better 27...Rf2 28.Kh1 e5–+) 28.Kf1 (28.Kh1 Rfa8 29.Nf1 Ra1 30.Ra1 Ra1–+) 28...Bg3 (28...Be3 29.Be6 Ne6 30.Ke1 Bf2 31.Kf1 Bc5 32.Rf7 Rf7 33.Ke1 Bb4 34.Rc3 Bc3 35.Kd1 Nd4 36.Ne4 Rf1) 29.hg3 Nd3 (29...Ng2 30.Kg1 Re2 31.Rcc7=) 30.Kg1 Nc1 31.Be6 Kh8 32.Ba2 Na2 33.Rb6 Kg7 34.Rb7 Kh6 35.Rb3 Nc1 36.Rb5 Ne2 37.Kh2 Nd4 (better 37...Rf5!? 38.Rb4–+) 38.Rb7 Nf5 39.Kh3 (39.g4 Ne3–+) 39...Ne3 (39...Rc8 40.Kg4–+) 40.g4 Kg5 (better 40...Rf4–+) 41.Rh7 (41.Kg3 Ng4 42.Rh7 Ne3–+) 41...Rf2 (41...Nf1 42.Rh6 Kh6 43.g5 Kg5 44.g4 Rf3 45.Kg2 Kg4 46.Kh1 Kh3 47.Kg1 Ne3 48.Kh1 Rf1) 42.Re7 Nd5 (better 42...Ng4 43.Re4 Rf4–+) 43.Re5= Kf6 44.Rd5 Rc2 45.Rd3 Rc4 46.Rf3 Kg7 47.Kh4 Rc8 48.Kg5 Rc5 49.Kh4 g5?? (better 49...Rc8=) 50.Kh5+– Rc7 51.Rf5 Rc1 52.Rg5 Kf7 Threatening mate... how? 53.Kh6 Rh1 54.Rh5 Rf1?? (54...Rg1 55.Rf5 Kg8 56.Rf2+–) 55.g5 (better 55.Rf5 Rf5 56.gf5+–) 55...Rg1 56.g6 Kg8 57.Re5 The mate threat is Re8 57...Rh1 58.Kg5 Kg7 (58...Kg7 59.Re7 Kg8+–). aravind555 (1755) – Ehin (1730), lichess.org, 2020.

5.Nf3 d5 6.c4 c6 7.Nc3 g5 (7...d4 8.ed4 Nd4 9.Nd4 Qd4 10.Be2+=) 8.Be2 (8.bc6 bc6 9.cd5 cd5 10.Bb5 Bd7 11.Bd7 Qd7+/–) 8...Rg8 9.0–0 g4 10.Ne5 Bg7 (10...d4 11.ed4 Nd4 12.Bd3+=) 11.Ng4 (11.bc6 bc6 12.Nc6 Qd6+/–) 11...Bh8 (better is 11...Ng4!? 12.Bg4 dc4 13.bc6 Qb6+=) 12.Nf6+– Bf6 13.d4 a6 (13...Nc7 14.bc6 bc6 15.Qc2+/–) 14.bc6 bc6 15.Rb1 Rb8 16.cd5 cd5 17.Qa4 Qd7 (17...Kf8+–) 18.Qd7 Bd7 19.Nd5 (19.Ba6?! Nc7 20.Bd3 Bh3+/–) 19...Kf8 (19...Bc6 20.Nf6 ef6 21.f3+–) 20.Ba3 (20.Nf6!? ef6 21.Ba6 Ra8+–) 20...Re8 (20...Kg7+–) 21.Nf6 1–0. jboger (2210) – kinderchocolate (2565), net–chess.com, 2013.

5.Nf3 d5 6.Be2 Bd7 7.0–0 c5 8.Ne5 Ne4 9.Nc3 Nc3 10.Bc3 Qc7 11.Bh5 Ng5?? (better is 11...Nd8 12.Qf3 Be6+/–) 12.f4+– (12.Nd7?! Qd7 13.d3 d4+=) 12...Ne4 (12...d4 13.ed4 (13.fg5?! Qe5 14.Bf7 Kd8+=; 13.Nd7?! Nh3 14.gh3 Qd7 15.ed4 cd4+–) 13...cd4 14.Bd4+– (14.fg5?! Qe5 15.Bf7 Kd8+=; 14.Nd7?! dc3 15.fg5 Kd7+–)) 13.Nf7 (13.Bf7?! Kd8 14.Bd5 Nd6+–) 13...g6 (13...Rg8 14.Nh6 g6 15.Ng8 Nc3 16.dc3+–) 14.Nh8 (14.Bh8?! Kf7 15.Bf3 Bg7 16.Bg7 Kg7 17.Be4 de4+–) 14...Nc3 15.dc3 Bg7 (15...e6 16.f5 ef5 17.Ng6 hg6 18.Bg6 Ke7 19.Qd5+–) 16.Ng6 hg6 17.Bg6 Kf8 18.Qd5 e6 19.Qc4 White intends f5 (better is 19.Qg5 Bb5 20.f5 Bf1 21.Rf1+–) 19...Rd8 (19...Ke7+–) 20.f5 Kg8 21.fe6 Bb5 1–0. NN – Fritz 8, 2004.

5.Nf3 Ne4 6.d3 Nd6 7.c4 c6 8.a4 Qc7 9.Qc2 Qa5 10.Bc3 Qc7 11.Be2 cb5 12.ab5 a5 13.Nbd2 a4? 14.Ra4+– Ra4 15.Qa4 Nc5 16.Qc2 b6 17.0–0 e6 18.Ra1 f5 19.Ne5 Nf7 20.Nf7 Kf7 21.Bf3 Kg8 22.d4 Ne4 23.Be4 fe4 24.Qe4 d5 25.Qd3 dc4 26.Nc4 Bd7 27.Rb1 Be7 28.h3 Bf6 29.Bb4 Bb5 30.Rc1 Bc6? 31.Nd6 Be4 32.Rc7 Bd8 33.Qe4 h5 34.Rc8 Kf8 35.Qf4 Kg8 36.Qf7 Kh7 37.Qh5 Kg8 38.Rd8# 1–0. coloplayah (1980) – jsivage (1925), net–chess.com, 2006.

5.Nf3+= g6 6.Be2 Bg7 7.0–0 0–0 8.c4 (8.d4 a6=) 8...b6 (8...a6 9.d4=) 9.Nc3 Bb7 10.d4 d5 (10...a6 11.a4+=) 11.Ne5+/– Qd6 12.a4 Nd7? (better is 12...Rfe8+/–) 13.Ba3+– Ndc5 (13...Nec5 14.f4 (14.dc5?! Qe5 15.c6 Qc3 16.cb7 Rab8 17.Qd5 Nc5+–) 14...dc4 15.Bc4+–) 14.cd5 (14.f4 Rfd8+–) 14...Bd5 (14...Be5 A) 15.de5?! Qe5 16.Qe1 Bd5+/–; B) 15.dc5?! Nc5 (15...Bh2? 16.Kh1 Nc5 17.Ne4+–) 16.Bc5 Bh2 17.Kh1 Qc5+= (worse is 17...bc5 18.g3+/–); C) 15.de6 Bh2 16.Kh1 Qe6 17.Kh2+– (17.dc5?! Be5 18.c6 Bc6 19.bc6 Bc3+–; 17.Bc5 Qh3 18.d5 Qh4 19.Be7 Qe7+–)) 15.Nd5 Qd5 16.Nc6 (16.dc5?! Qe5 17.cb6 ab6+=) 16...Rfe8 (16...Qg5 17.Rc1 Nd8 18.dc5 (worse is 18.Bc5 bc5 19.Rc5 Qf6+–) 18...Nc6 19.cb6+–) 17.dc5 (17.dc5 Qg5 18.cb6 ab6 19.Rc1+–) 1–0. Dopper,Johan – Benhassine, corr 3GMM–31, 1997.

5.Nf3 g6 6.Be2 Bg7 7.0–0 0–0 8.c4 c6 9.a4 cb5 10.ab5 b6 (10...d5 11.d4+=) 11.Nc3 Bb7 12.d4 d5 (12...Qc7 13.Qd3+=) 13.Ne5 dc4 14.Bc4 Nd5 15.Qb3 Nc3 16.Nf7 (better is 16.Qc3 Nc7 17.Rfc1+/–) 16...Nd5?? (better is 16...Ne2! 17.Kh1 Kf7 18.Be6 Ke8+/–) 17.Nd8+– Rad8 (17...Rfd8 18.e4 Bd4 19.ed5 Bb2 20.Qb2 Bd5 21.Bd5 Rd5+–) 18.Ra7 (18.Ra7 Ng5 19.Ba3+–) 1–0. pcmvr (2740) – funkade (2270), net–chess.com, 2007.

4.d4 Nf6

5.d5 Nc5 6.c4 c6 7.a4 (7.dc6 bc6 8.bc6 d6=) 7...cd5=+ 8.cd5 e6 9.Ba3 (9.de6 fe6 10.Nf3 d5=) 9...ed5 (9...Nd5 10.Nf3–/+) 10.Nc3 Nfe4 (10...Qa5 11.Nge2=+) 11.Nd5= d6 (better is 11...Qa5 12.Bb4 Nd3 13.Bd3 Bb4 14.Kf1 Nc3+=) 12.f3?? (12.Bc4!?+=) 12...Nf6 (12...Qh4!? 13.g3 Ng3–/+) 13.e4 (13.Nf6 Qf6 14.Rc1 Qh4 15.g3 Qa4 16.Qa4 Na4=+) 13...Nd5=+ 14.Qd5 (14.Bc5 Nc3 15.Qd3 Qa5=+) 14...Qf6 (better is 14...Qa5 15.Kf2 Qc3–/+) 15.Rd1?? (15.Rc1=+) 15...Be6 (better is 15...Qc3 16.Qd2 Qa3–+) 16.Qd4= Qd4 17.Rd4 0–0–0 (17...Rd8 18.Nh3=) 18.Bc4 Bc4 (18...Nb3 19.Bb3 Bb3 20.Kd2+=) 19.Rc4+= Kb8 20.Ne2 (20.Rd4!? Ne6 21.Rd1=) 20...Nd3= 21.Kd2 Ne5 (better is 21...Nf2 22.Ra1 d5 23.ed5 Ba3 24.Ra3 Rd5 25.Rd4 Rhd8=) 22.Rhc1?? (better is 22.Rd4+/–) 22...Nc4 (22...d5 23.R4c3 Nc4 24.Kc2 Ba3 25.Rd1–+) 23.Rc4 d5 24.ed5 (24.Rc3 de4 25.Ke3 Ba3 26.Ra3 ef3 27.Kf3–+) 24...Ba3 (25.Rd4 Rd7–+; better is 24...Rd5!? 25.Kc2 Ba3 26.Nc3–+) 0–1. kamera – dommers, GameColony.com, 2002.

5.d5 Nc5 6.c4 e5 7.Nf3 d6 8.Be2 =.

5.d5 Nc5 6.Nf3 e6 =.

5.Nf3 c5=.

5.Nf3 Ne4 6.Bd3 N6g5 7.Ng5 Ng5 8.0–0 e6? (8...d5 9.Nd2+–) 9.c4?? (9.f4 Nh3 10.gh3 d5+–) 9...b6? (better 9...d5+–) 10.f4+– Nh3 11.gh3 Qh4 (11...Bb7 12.Ba3+–) 12.Qg4 Qf6 13.Nd2 (13.Qg2 Rb8+–) 13...Bb7 14.Ne4 Qg6 (14...Qe7 15.f5 0–0–0+–) 15.Nd6! Bd6 (15...cd6 16.Bg6 Discovered attack; 15...Bd6 16.Bg6 Discovered attack) 16.Bg6 hg6 17.Kf2 (17.a4 Bb4+–) 17...0–0–0 (17...Be4 18.Ke2+–) 18.Bb2 f5 19.Qg6 Rh3 20.Ke1 (20.Ke2 Rh2 21.Rf2 Rdh8+–) 20...Rh2 (20...Re3 21.Kd1+–) 21.Rf2 Rh1 (21...Rh3 22.Ke2 Bf8+–) 22.Rf1 (better 22.Ke2!? Rhh8+–) 22...Rh2 23.Rf2 Rh1 24.Rf1 (better 24.Ke2 Rhh8 25.d5 ed5 26.cd5 Bd5 27.Qf5 Bc4 28.Kd2 Bb4 29.Bc3+–) 24…Rh2= ½–½. OnlyPolishOpening (1710) – DXXDS, lichess.org, 2020.

4.Nf3 c6

5.a4 a6 6.Bb2 (6.bc6 dc6 7.Nc3 g6+=) 6...cb5 (6...ab5!? 7.ab5 Ra1 8.Ba1 Nf6=) 7.ab5+– b6? (better 7...a5+–) 8.ba6+– Bb7 (8...b5 9.Bb5 Qb6+–) 9.ab7 Ra1 10.Ba1 Qb8 (10...Nc5 11.Be5 Nb7 12.Nc3+–) 11.Ba6 Nc5 (11...f6+–) 12.Be5 d6 13.Qe2 Nb7 (13...Kd8 14.Nd4 Na6 15.Nc6 Kc7 16.Nb8 Nb8 17.Qg4+–) 14.Qb5 Kd8 15.Bd4 e5 16.Bb6 Kc8 17.Qe8 1–0. DEFFM – GuestGPBF, freechess.org, 2020.

5.a4 Nc7 6.Bb2+– a6 (6...Nf6 7.Bd3+–) 7.c4 (7.Nc3!?+–) 7...ab5+= 8.cb5 cb5 9.ab5 Ra1 10.Ba1 Na8 (10...Nf6!?+=) 11.Be2 Qa5 (11...Nf6 12.0–0+–) 12.Qc1 Kd8 (better 12...Qd8!?+–) 13.Bc3 Qc7 (13...Qa7 14.Bd4 b6 15.Nc3+–) 14.0–0 f6 (14...Nf6 15.Qb2 Qb8 16.b6+–) 15.Qa3 Ke8 (15...Qb8 16.b6! Ke8+–) 16.Qa8 (16.Qa8 b6 17.Bd4+–) 1–0. GuestCMZR – mercymu, freechess.org, 2020.

5.a4 Nf6!?=.

5.Nc3 a6 6.bc6 bc6 (6...dc6 7.Bb2+=) 7.Rb1 Nc7 (7...Nf6 8.Be2+=) 8.Bb2 (8.Ne5 Nh6+=) 8...e6 (8...d5 9.Ne5+=) 9.e4 h6 (9...d5 10.Bd3+=) 10.e5 Nb5 11.a4 Nc3 12.Bc3 (worse is 12.dc3 d5=) 12...Ne7 13.d4 (13.Bc4 Nd5 14.Bd5 ed5+/–) 13...Nd5 (13...d5 14.Bb4+/–) 14.Bd2+/– Be7 (14...d6 15.c4 Ne7 16.ed6 Qd6 17.Bd3+/–) 15.c4 Nc7 16.Bd3 d6 17.ed6 Bd6 (17...Qd6 18.Be4 0–0 19.Bb4+/–) 18.Be4 Bd7 19.c5 Be7 20.Ne5 0–0 21.Bc6 (21.Ba5 Bf6+/–) 21...Bc6 22.Nc6 Qd7 23.Qf3 Nd5 24.Ne7 Ne7 25.Rb7 Qd8 26.0–0 (26.c6 Rc8 27.Bb4 Nc6 28.Bf8 Qf8+/–) 26...Nd5 (26...Nf5 27.Bc3+/–) 27.Rc1 (27.Rfb1 Rc8+/–) 27...Qc8 (27...Rc8 28.Qg3 Qf6 29.Qe5 Qe5 30.de5+/–) 28.c6 Rb8 29.Rcb1 White gets strong initiative 29...Rb7 (29...Ra8 30.Qg3 Kh8 31.Qd6+–) 30.cb7 (worse is 30.Rb7 Qc6 31.Qb3 Rc8+=) 30...Qb8 31.Qe2 Qa7 32.Qc4 Nb6 (32...h5 33.Bc1 Qb8 34.Ba3+–) 33.Qc5 Rb8 (33...Qb7 34.Qb6 Qe4+–) 34.Qb6 Rb7 35.Qb7 Qd4 36.Qc8 Kh7 37.Qc2 f5 38.Bc3 Qd5 39.Rb6 a5 (39...Kg8 40.Ra6 Qd7 41.Qe2+–) 40.Rb5 Qd6 (40...Qd7+–) 41.Rb7 e5 42.Qf5 Qg6 (42...Kh8 43.h4 Qd8 44.Qg6 Qd1 45.Kh2 Qh1 46.Kh1 Kg8 47.Qg7) 43.Qe5 Qb1 (43...Kh8 44.Qb8 Qe8 45.Qe8 Kh7 46.Rg7) 44.Rb1 1–0. kamret (2195) – frezze15, GameColony.com, 2003.

5.Nc3 a6 6.bc6 dc6 7.Bb2 Nf6 8.Ne5 Nc5 9.Bc4 e6 10.d4 Nce4 (10...Ncd7 11.0–0=) 11.Ne4+/– Ne4 12.0–0 f6?? (better is 12...Nf6+/–) 13.Qh5+– g6 14.Ng6! (14.Ng6 hg6 15.Qh8+–) 1–0. pierre – otiem, internet, 2010.

4.Nf3 d5

5.Bb2 Bd7 6.c4 c6 7.cd5 cd5 8.Be2 Qb6 (8...Nf6 9.Nc3+–) 9.a4 Nf6 10.a5 Qc5 11.Ba3 Qc7 12.0–0 Qa5 (12...g5!?+–) 13.Nc3 Qb6 (13...Qd8 14.Qb3+–) 14.d4+– Nc7 15.Bc5 Qe6 16.Ng5 (16.Ne5 b6 17.Bb4 h5+–) 16...Qf5+– 17.f4 h6 18.Bd3 Ne4?? (better 18...Qg4 19.Nf3 b6+–) 19.Nge4 (19.Be4?! de4 20.Nge4 b6+=; 19.Nce4?! de4 20.Be4 Qf6+–) 19...de4 20.Be4 Qe6 (20...Qf6 21.Qd3 e6 22.Bb7 Bc5 23.dc5+–) 21.Qd3 Qb3 (21...Bc8 22.f5 Qd7 23.Ba7 Kd8+–) 22.Rfb1 Qe6 23.f5 White plans b6 23...Qf6 24.Bb7 Rb8 (24...Rd8 25.Ra7 e5 26.Ne4 Qf5 27.Bb6+–) 25.Ra7 Bf5 (25...e6 26.b6 Na6 27.Ba6 Bc5 28.Ne4+–) 26.Be4 Rd8 (26...Be4 27.Ne4 Qe6 28.Rc7 f5+–) 27.b6 Ne6 28.Qb5 Rd7 29.Qd7 1–0. GuestHTPN – GuestVSWX, freechess.org, 2019.

5.d4 a6 6.ba6 ba6 7.c4 dc4 8.Bc4 c5 9.Ne5 Nf6 10.0–0 (10.Qf3!? Bd7 11.Nd7 Kd7 12.dc5 Nc5 13.Bf7 e6+/–) 10...cd4+/– 11.Qf3 Rb8 12.Nc6 Qc7 13.Nb8 Qb8? (13...Qc4 14.Na3 Qd5=) 14.Ba6+– Ba6 15.Qc6 (15.Qc6 Nd7 16.Qa6+–) 1–0. marekt – Hammi.Bogart, ChessWorld.net, 2003.

5.d4 c5 6.c4 cd4 (6...Nf6 7.cd5 Nd5 8.e4 Nf6 9.d5 Nc7 10.Nc3+=; 6...g6 7.Bb2 Bg7 8.cd5 Qd5 9.Nc3 Qd8 10.dc5+/–; 6...dc4 7.Bc4 cd4 8.ed4 g6 9.0–0 Bg7 10.Be3+=; 6...Qa5 7.Bd2 Qd8 8.cd5 Qd5 9.Nc3 Qd8 10.d5+=) 7.ed4 Nf6 8.Ne5 g6 9.Nc3 Bg7 10.Be3 +=.

5.d4 c5 6.bc6 bc6 7.c4 Qa5 8.Bd2+/– Qd8 9.cd5 Nc7? (better is 9...Qd5!? 10.Nc3 Qd6+/–) 10.dc6+– Nd5 (10...Bf5 11.Nc3+–) 11.Nc3 Nc3 12.Bc3 Qd5 13.Qb3 e6 14.Qd5 ed5 15.Ba5 Ne7 (15...Rb8 16.Bd3+–) 16.c7 Nc6 17.Bb5 Bd7 18.Rc1 Na5 (18...Ne7 19.Bd7 Kd7+–) 19.c8Q Rc8 20.Rc8 Ke7 21.Rc7 Kd8 (21...a6 22.Rd7 Ke6 23.Ba4+–) 22.Rd7 (22.Bd7?! Kc7 23.Bb5 Bd6+/–) 22...Kc8 23.Rf7 Bb4 (23...Nc4 24.Bc6 Nb6 25.Ra7+–) 24.Ke2 g6 25.Rb1 Bd6 26.Ng5 h6 27.Bd7 Kd8 (27...Kc7 28.Ne6) 28.Rb4 (28.Ne6). Alissa – Seimi Agus Eion, ChessWorld.net, 2005.

5.d4 c5 6.bc6 bc6 7.c4 Nf6 8.Bd3 Rb8 9.Qa4 Qc7 10.cd5 +=.

5.d4 c5 6.bc6 bc6 7.c4 Nf6 8.Ne5 +=.

5.d4 c5 6.Be2 g6 (6...c4 7.Nc3 Nf6 8.0–0 a6 9.ba6 Ra6 10.Ne5+=; 6...Qa5 7.Bd2 Qb6 8.Nc3 Nf6 9.Na4 Qd6 10.0–0+=; 6...g5 7.Bb2 Bg7 8.0–0 c4 9.e4 de4 10.Ne5+=; 6...Nf6 7.c4 cd4 8.ed4 dc4 9.Bc4 Nc7 10.Bg5=) 7.c4 Bg7 8.cd5 Qd5 9.0–0 cd4 10.Bb2 =.

5.d4 Qd6 A) 6.c4 Nf6 (6...a6 7.Ba3 Qd8 8.ba6 ba6 9.Ne5 Nf6 10.Nc3+–; 6...c6 7.bc6 bc6 8.Ba3 Qc7 9.Bd3 Rb8 10.0–0+/–; 6...dc4 7.Bc4 Nf6 8.0–0 Ne4 9.Ne5 Qd8 10.Ba3+/–; 6...Nh6 7.Ba3 Qd8 8.Nc3 c6 9.bc6 Qa5 10.Qc1+/–) 7.Ba3 c5 8.Nc3 Qc7 9.Qb3 dc4 10.Bc4+=; B) 6.Ba3 Qd8 (6...c5 7.bc6 Qc6 8.Ne5 Qb6 9.c4 Qa5 10.Qd2+/–; 6...Qb6 7.c4 dc4 8.Bc4 Qa5 9.Qd2 Qa4 10.Qd3+/–; 6...Qd7 7.Bd3 Nf6 8.c4 c5 9.bc6 Qc6 10.Ne5+/–) 7.c4 Nf6 8.cd5 Nd5 9.Bd3 g6 10.0–0+=; C) 6.Be2 Nf6 (6...a6 7.ba6 ba6 8.c4 dc4 9.Bc4 Nf6 10.Ne5+/–; 6...Bd7 7.Ne5 Nf6 8.Ba3 Qb6 9.c4 c6 10.Nd7+/–; 6...Qb6 7.c4 dc4 8.Bc4 Nf6 9.0–0 Ne4 10.Bd3+/–; 6...c5 7.bc6 bc6 8.Ba3 Qc7 9.c4 Rb8 10.0–0+/–) 7.c4 dc4 8.Bc4 c5 9.bc6 Qc6 10.Qb3+=; D) 6.Bd3 Nf6 (6...Bd7 7.0–0 Nf6 8.c4 dc4 9.Bc4 c5 10.bc6+/–; 6...c5 7.bc6 bc6 8.Ba3 Qc7 9.0–0 Nf6 10.c4+/–; 6...c6 7.bc6 bc6 8.Ba3 Qc7 9.0–0 Nf6 10.c4+/–; 6...Qb4 7.c3 Qd6 8.c4 Nf6 9.0–0 c5 10.bc6+/–) 7.0–0 Bd7 8.Ne5 c5 9.bc6 Bc6 10.c4+/–.

5.d4 Nf6 A) 6.Bd3 a6 (6...g6 7.0–0 Bg7 8.c4 dc4 9.Bc4 0–0 10.Nc3+=; 6...c6 7.bc6 bc6 8.c4 Rb8 9.Qa4 Qc7 10.cd5+=; 6...c5 7.bc6 bc6 8.c4 Rb8 9.Qa4 Qc7 10.cd5+=; 6...Bd7 7.0–0 g6 8.c4 Bg7 9.Ne5 c6 10.bc6+=) 7.ba6 ba6 8.c4 c5 9.0–0 cd4 10.ed4+=; B) 6.Be2 g6 (6...a6 7.ba6 ba6 8.c4 c5 9.Ne5 cd4 10.ed4+=; 6...c5 7.bc6 bc6 8.c4 Rb8 9.Ne5 Qc7 10.Nc3+=; 6...c6 7.bc6 bc6 8.c4 Rb8 9.Nc3 Bd7 10.0–0+/–; 6...Ne4 7.c4 dc4 8.Bc4 g6 9.0–0 Bg7 10.Qc2+=) 7.0–0 Bg7 8.c4 a6 9.ba6 ba6 10.Nc3+=; C) 6.Ne5 Ng5 (6...Nd7 7.Nd7 Qd7 8.c4 dc4 9.Nc3 h6 10.Bc4+/–; 6...g6 7.c4 Bg7 8.Nc3 Ng5 9.Bd3 Bf5 10.0–0+=; 6...a6 7.ba6 ba6 8.c4 c5 9.cd5 Qd5 10.Nc3+/–; 6...Rb8 7.c4 Ng5 8.cd5 Nd5 9.Bd3 Nb4 10.h4+/– 1.09) 7.Bd3 Nge4 8.c4 dc4 9.Bc4 Nd6 10.Bd3+=; D) 6.c4 c6 (6...Bd7 7.cd5 Nd5 8.e4 Nf6 9.Qc2 g6 10.Bc4+/–; 6...c5 7.bc6 bc6 8.Bd3 Rb8 9.Nc3 dc4 10.Bc4+/–; 6...g6 7.Nc3 Bg7 8.Qb3 dc4 9.Bc4 0–0 10.0–0+=; 6...a6 7.ba6 ba6 8.Nc3 c6 9.Ne5 Qc7 10.Qa4+/–) 7.bc6 bc6 8.Bd3 Rb8 9.Nc3 Qc7 10.Bd2+=.

5.Be2 a6 A) 6.d4 ab5 (6...Nf6 7.ba6 ba6 8.c4 c5 9.Ne5 cd4 10.ed4+=; 6...c5 7.bc6 bc6 8.c4 Nf6 9.Ne5 Qc7 10.Nc3+/–; 6...c6 7.bc6 bc6 8.c4 Nf6 9.Nc3 Ne4 10.Ne4+/–) 7.Bb5 Bd7 8.Bd3 Nf6 9.0–0 c5 10.c4=; B) 6.Bb2 Nc5 (6...Nf6 7.ba6 ba6 8.0–0 Rb8 9.Be5 Ng4 10.d4+=; 6...ab5 7.Ne5 Nc5 8.Bb5 Nd7 9.Qh5 Nh6 10.0–0+=) 7.ba6 Na6 8.0–0 Nf6 9.Bf6 ef6 10.Nc3=; C) 6.0–0 ab5 (6...Nf6 7.ba6 b6 8.Bb5 Bd7 9.a4 c6 10.Be2+=) 7.Bb5 c6 8.Be2 Nf6 9.Bb2 b5 10.d3+=; D) 6.ba6 ba6 7.d4 Nf6 8.c4 c5 9.Ne5 cd4 10.ed4+=.

5.Be2 Nc5 A) 6.Ba3 Ne4 (6...Nd7 7.d4 Nb6 8.0–0 Bf5 9.Nbd2 Nf6 10.Bb4+=; 6...Na4 7.0–0 Nf6 8.c4 Nb6 9.cd5 Nbd5 10.Qc2+=) 7.0–0 Ngf6 8.c4 Bg4 9.d3 Nd6 10.h3+=; B) 6.Nc3 Bg4 (6...e6 7.d4 Ne4 8.Ne4 de4 9.Ne5 f6 10.Nc4+=; 6...Nf6 7.Ba3 Nce4 8.Ne4 de4 9.Ne5 Nd7 10.Nd7+=; 6...Bf5 7.Bb2 e6 8.0–0 Nh6 9.a4 f6 10.a5+=; 6...a6 7.ba6 Na6 8.0–0 e6 9.e4 de4 10.Ne4+=) 7.d4 Ne4 8.Ne4 de4 9.Ne5 Be2 10.Qe2=; C) 6.Bb2 Bg4 (6...Nf6 7.Bd4 e6 8.0–0 Bd6 9.Ne5 0–0 10.Nc3=; 6...e6 7.0–0 Nf6 8.c4 dc4 9.Bc4 a6 10.ba6=; 6...Bf5 7.0–0 e6 8.Nc3 Nf6 9.a4 Bd6 10.a5=; 6...Nh6 7.0–0 Bg4 8.Nc3 e6 9.d4 Nd7 10.e4+=) 7.0–0 e6 8.Bd4 Nf6 9.c4 dc4 10.Bc4=; D) 6.0–0 Nf6 (6...Bg4 7.Ba3 Ne4 8.c4 Ngf6 9.d3 Nd6 10.h3+=; 6...e6 7.Ba3 Bd6 8.d4 Ne4 9.Bd6 Nd6 10.a4+=; 6...Ne4 7.d3 Nd6 8.c4 dc4 9.dc4 Nf6 10.c5+/–; 6...a6 7.d4 Ne4 8.ba6 ba6 9.c4 e6 10.Ne5+=) 7.Ba3 Nce4 8.c4 Bg4 9.d3 Nd6 10.h3+=.

5.Be2 Qd6 6.Ba3 (6.0–0 Bd7 (6...Nf6 7.Bb2 a6 8.Be5 Qd7 9.Nc3 Nc5 10.ba6+=; 6...Nc5 7.Bb2 Bf5 8.Be5 Qb6 9.Nh4 Be4 10.d3+=; 6...h6 7.Ba3 Qb6 8.c4 d4 9.Qc2 de3 10.de3+/–; 6...a6 7.Ba3 c5 8.Bb2 Nf6 9.Be5 Qd7 10.Nc3+=) 7.Ba3 Qb6 8.Nc3 Nf6 9.Ne5 Rd8 10.d4+=; 6.Bb2 Nc5 (6...Nf6 7.0–0 Ng4 8.h3 Nf6 9.c4 c5 10.Be5+/–; 6...a6 7.ba6 ba6 8.c4 Nf6 9.Be5 Qd7 10.Nc3+/–; 6...Qc5 7.0–0 Bd7 8.a4 Nf6 9.Ne5 Bc8 10.d4+/– 1.00; 6...Bd7 7.Be5 Qc5 8.a4 f6 9.Bg3 Ng5 10.Ng5+/–) 7.0–0 Bf5 8.Be5 Qb6 9.Nh4 Nh6 10.d4+/–; 6.d4 c5 (6...Nf6 7.0–0 c6 8.bc6 bc6 9.c4 Rb8 10.Qa4+/–; 6...Bd7 7.Ne5 Nf6 8.Ba3 Qb6 9.c4 c6 10.Nd7+/–; 6...c6 7.c4 Nc7 8.bc6 bc6 9.Ne5 Nf6 10.Qa4+/–; 6...a6 7.ba6 ba6 8.c4 Nf6 9.Nc3 dc4 10.Bc4+/–) 7.bc6 bc6 8.Ba3 Qc7 9.0–0 Rb8 10.c4+=) 6...Qb6 (6...Qd7 7.d4 g6 8.Ne5 Qd8 9.c4 Bg7 10.Nc3+/–; 6...Qd8 7.0–0 Nf6 8.d4 a6 9.ba6 ba6 10.c4+/–; 6...c5 7.bc6 Qc6 8.Ne5 Qb6 9.c4 Qc7 10.Qa4+/–) 7.Nc3 (7.0–0 Nf6 8.c4 d4 9.Bb2 de3 10.de3+=) 7...Nc5? (better is 7...Nf6+= 8.0–0 Qa5 9.Bb2 Nc5 10.Ne5+=) 8.Nd5+– Qh6?? (better is 8...Qd6 9.c4 e6+–) 9.Nc7 Kd8 10.Na8 Nd7 11.d4 Qg6 (11...Ngf6 12.Qd2 e6 13.Qa5 b6 14.Qa7 Ba3 15.Ne5 Bb4 16.Kf1+–) 12.Ne5 Ne5 13.de5 Bd7 14.Qd4 Qg2 15.0–0–0 Qf2 (15...Nf6 16.ef6 Qh3 17.Qe5 Qg3 18.hg3 Ke8 19.Qb8 Bc8 20.Qc8) 16.Qd7 1–0. pierre – nornnan_11, chesspark.com, 2008.

5.Be2 Nf6 A) 6.0–0 a6 (6...g6 7.d4 Bg7 8.c4 0–0 9.Nc3 dc4 10.Bc4+=; 6...Nc5 7.Ba3 Nce4 8.c4 Bg4 9.d3 Nd6 10.h3+=; 6...g5 7.d4 Bg7 8.c4 a6 9.ba6 ba6 10.Nc3+=; 6...Bd7 7.Ne5 Ng5 8.Bb2 Bf5 9.d3 h6 10.Nd2+/–) 7.ba6 b6 8.Bb5 Bd7 9.a4 c6 10.Be2+=; B) 6.Bb2 Nc5 (6...a6 7.ba6 ba6 8.c4 Rb8 9.Be5 dc4 10.Bc4+=; 6...g6 7.Bf6 ef6 8.0–0 a6 9.ba6 ba6 10.d4+=; 6...g5 7.Bf6 ef6 8.0–0 g4 9.Ne1 f5 10.Nd3=; 6...Bd7 7.0–0 Nc5 8.c4 e6 9.Ne5 dc4 10.Bc4+=) 7.Bd4 e6 8.0–0 Bd6 9.Ne5 Nfd7 10.Nd7=; C) 6.c4 d4 (6...Nc5 7.Ba3 Nce4 8.0–0 Bg4 9.d3 Nd6 10.h3+=; 6...a6 7.cd5 Nd5 8.ba6 ba6 9.Ne5 Qd6 10.d4+/–; 6...dc4 7.Bc4 Nc5 8.d4 Be6 9.Be6 Ne6 10.0–0+=; 6...c6 7.bc6 bc6 8.d4 Rb8 9.Ne5 Qc7 10.Nc3+=) 7.d3 a6 8.ba6 Ra6 9.0–0 Qd6 10.Nbd2+=; D) 6.d4 g6 (6...c6 7.bc6 bc6 8.c4 Rb8 9.Ne5 Qc7 10.Nc3+=; 6...a6 7.ba6 ba6 8.Ne5 Ng5 9.0–0 e6 10.c4+=; 6...c5 7.bc6 bc6 8.c4 Rb8 9.Nc3 Ne4 10.Ne4+/–; 6...Bd7 7.0–0 c5 8.bc6 bc6 9.c4 Nc7 10.Ne5+/–) 7.0–0 Bg7 8.c4 a6 9.ba6 ba6 10.Nc3+=.

4.Nf3 Nf6

5.Ba3 d5 6.Nc3 g6 7.Bd3 Bg7 8.Rb1 0–0 9.0–0 Bd7 10.Ne5 c6 11.bc6 bc6 12.f4 Ne8 13.Rb7 N8c7 14.Qf3 Be5 15.fe5 Ng5 16.Qg3 e6?? (better is 16...Nge6+–) 17.Bf8 Kf8 18.Rc7! Qc7 19.Qg5 Qd8 (19...Kg8+–) 20.Qh6 Ke7 21.Rf7! Kf7 22.Qh7 Ke8 (22...Kf8 23.Bg6 Be8 24.Qh8 Ke7 25.Qg7 Bf7 26.Qf7) 23.Bg6 Kf8 24.Qf7 1–0. combat – pawn8, Live Game Caissa's Web, 2004.

5.Bb2 d5 6.c4 c5 7.cd5 Qd5 8.Nc3 Qd6 (8...Qd8 9.Rc1+=) 9.Bc4 Ng4? (better 9...b6!?+–) 10.Ne4+– Qb6 11.a4 h5 (11...f5 12.Ng3 f4 13.Ne4 fe3 14.fe3+–) 12.a5 Qc7 13.0–0 f5 14.b6! ab6 15.ab6 Ra1 16.Qa1 (16.bc7 Rd1 17.Bb5 Kf7 18.Nfg5 Ng5 19.Ng5 Kg6 20.Rd1 Kg5 21.f4 Kh6=; 16.Ba1?! Qb6 17.Neg5 Ng5 18.Ng5 e6+–) 16...Qb6 (16...Qd8 17.Nc3 Qb6 18.h3+–) 17.Neg5 Ng5 (17...Nd8 18.Qa8 Qc6 19.h3+–) 18.Ng5 Rh6 (18...e6 19.h3 Qc7 20.hg4 hg4+–) 19.h3 Nf6 (19...Qb4 20.Qa2 e6 21.hg4 hg4+–) 20.Qa8 Kd7 (20...Qc6 21.Bb5!! Nd7 22.Bc6 Rc6 23.Qa2+–) 21.Be6 Qe6 22.Ne6 Ke6 23.Qc8 Nd7 24.Ra1 Kd6 25.Qb7 e5 (25...Nb8 26.Qb8 Ke6 27.Qb3 c4 28.Qc4 Kd7 29.Ra7 Ke8 30.Ra8 Kd7 31.Qc8 Kd6 32.Ra5 Rh8 33.Be5) 26.Ra7 Nb6 (26...Nb8 27.Qb8 Kd5 28.Qb3 c4 29.e4 fe4 30.Qb5 Bc5 31.Rc7 c3 32.Qc5 Ke6 33.Bc3 Kf5 34.Qe5 Kg6 35.Rg7) 27.e4 fe4 28.Qb6 Kd5 29.Qb3 c4 30.Qb7 Kc5 (30...Rc6 31.Ra6 Ke6 32.Qc6 Kf5 33.Qg6 Kf4 34.Qh5 c3 35.Qg4) 31.Be5 Ra6 32.Ra6 g5 (32...c3 33.Ra5 Kc4 34.Qb5) 33.Ra5 1–0. DEFFM – GuestXJMM, freechess.org, 2019.

5.Bb2 d5 6.Be2 c6 7.a4 Bd7 8.c4 Nc5 9.0–0 e6 10.Be5 dc4 11.Bc4 cb5 12.ab5 Nce4 13.Nc3 Nc3 14.dc3 Be7 15.Qd3 0–0 16.Rfd1 Qc8 17.Ng5 Rd8 18.Bf6 Bf6 19.Qh7 Kf8 20.Qh8 Ke7 21.Qh5 Qc4?? (better is 21...g6 22.Qg4 Qc7+=) 22.Qf7 1–0. Fritz 11 – mgrowe, internet, 2013.

5.c4 a6 6.Bb2 ab5 7.cb5 Nd5 8.Nc3 Nc3 9.Bc3 c6 10.bc6 dc6 11.Be2 Nc7 12.0–0 Nd5 13.Bb2 e6 14.Qb3 b5 (14...f6!?=) 15.a4 b4 16.Rfc1 c5 17.d4 Qb6 (17...cd4!? 18.Nd4 Ba6+/–) 18.Bb5 Kd8? (better is 18...Bd7 19.dc5 Bc5 20.Bg7 Rg8 21.Bd7 Kd7+–) 19.dc5 (better is 19.Ne5!? Qc7 20.Nc6 Ke8 21.Nb4 Bd7 22.Nd5 ed5 23.Qd5 Rd8 24.dc5 Ke7+–) 19...Bc5 20.Qc4 Be7 (20...Bd6 21.Bg7 Rg8 22.Qh4 Ne7 23.Be5+–) 21.Ne5 (worse is 21.Bg7 Rg8 22.Bd4 Qb7+–) 21...Rf8 (21...Bf6 22.a5 Qb7+–) 22.Nc6 (22.Nc6 Kc7 23.Ne7 Kd8 24.Nd5+–) 1–0. Fournier,Frederic (1870) – flojillo490 (1825), Active, 2006.

5.d4 c6 6.Nc3 cb5 7.Bb5 Qa5 8.Bd2 Nd5 9.Nd5 Qb5 10.Nc3 Qa5 11.0–0 d6 12.Rb1 Qf5 13.e4 Qh5 14.d5 Nc7 15.Qe2 Qg4 16.Nb5 Na6 17.Qe3 b6 18.a4 Qd7 19.a5 Nc5 20.ab6 ab6 21.Rb4 Bb7 22.Nbd4 Qc7 23.Rfb1 Nd7 24.Bc3 Qc5 25.Rb5 Qc7 26.R5b4 Qc5 27.Nd2 Ba6 28.Qh3 h5 29.Nc6 b5 30.Nc4 Nb6 31.Bd4 Qc4 32.Rc4 Nc4 33.Ra1 e6 34.de6 Rh6 35.e7 Be7 36.Ra6 Rd8 37.Ra7 Re6 38.Nd8 Kd8 39.Qh5 Re4 40.Qh8 Bf8 41.Qf8 Re8 42.Bb6 Nb6 43.Qd6 Kc8 44.Qc7# 1–0. Betsy516 – Bace, 2001.

5.d4 Ne4 6.Bd3 N6g5? (better is 6...d5+=) 7.Ng5+– Ng5 8.Nc3 (better is 8.f4 e5 9.fg5+–) 8...c6+/– 9.0–0 a6 10.ba6 b6 11.e4 e6? (11...Ne6 12.Be3+/–) 12.Re1?? (better is 12.f4 Bb4 13.Bd2 (13.fg5 Bc3 14.Rb1 Bd4 15.Kh1 0–0+=) 13...Bc3 14.Bc3 Ne4 15.Be4 Ba6 16.Re1+–) 12...Bb4+= 13.Bd2 Bc3 14.Bc3 b5? (14...d5 15.ed5 cd5 16.Qg4 Ba6 17.f4 Bd3 18.cd3+–) 15.d5 (better is 15.f4+–) 15...f6 16.e5 Ba6? (better is 16...f5+–) 17.Qh5 Kf8 18.Rad1 (18.ef6!? gf6 19.h4 Nh3 20.gh3 Qe7+–) 18...Kg8? (better is 18...cd5 19.ef6 gf6+/–) 19.ef6 gf6 20.de6 Qe8 (20...Ne6 21.Qf3 Qf8 22.Bf6 Bc8+–) 21.Qg4 h5 22.Qf5 d6 (22...Rh6 23.ed7 Qf8 24.Bf6 Rf6 25.Qg5 Qg7 26.Re8 Rf8 27.Rf8 Rf8+–) 23.Bf6 Nf7 24.Qg6 Kf8 25.Qg7 1–0. rene822 – sueludad10, Live Game Caissa's Web, 2004.

3.e3 Nf5

4.a4 c6 5.Nf3 Nf6 (5...d5 6.d4+=) 6.c4 (6.d4 d5+=) 6...g6 (6...d5 7.d4=) 7.d3 (7.d4 Bg7+=) 7...d5= 8.Be2 (8.bc6 bc6 9.d4 Bg7=) 8...dc4 9.dc4 Qd1 10.Bd1 Bg7 11.0–0 (11.Bb2 0–0=) 11...Ne4 12.Ra2 (12.Ra3 Nfd6 13.Be2 Be6=) 12...0–0 (12...Nfd6 13.Nfd2 cb5 14.ab5=) 13.Bc2 (13.Bb2 cb5 14.Bc2 Ned6 15.Bg7 Kg7+=) 13...Nfd6 14.Bb3 (better 14.Be4!? Ne4 15.Bb2=) 14...Nc5–/+ 15.Bd1 cb5 (15...Nc4?! 16.Rc2 Be6 17.bc6 bc6 18.Ng5=) 16.cb5 (16.ab5 Be6 (16...Nc4?! 17.Rc2=) 17.Nbd2 Nc4–/+ (worse 17...Bc4 18.Nc4 Nb5 19.Bb2+–)) 16...Bf5 (16...Be6!? 17.Rd2 Bc4 18.Ba3–/+) 17.Na3–/+ Rfd8 18.Nd4 (18.a5 Rac8–/+) 18...Bd3 19.Re1 Rac8 (19...e5 20.Nf3–/+) 20.Bd2 Nde4 21.Bc2?? (better 21.a5–/+) 21...Nd2–+ 22.Bd3 (22.b6 e5 23.Ndb5 ab6 24.Bd3 Rd3–+) 22...Nd3 23.Rd2 (23.Rd1 Ne4 (worse 23...Bd4 24.Rad2 Nb2 25.Rb1–+) 24.Rf1 Bd4 25.ed4 Rd4–+) 23…Ne1 (23...Ne1 24.Kf1 Bd4 25.Rd4 Rd4 26.ed4 Rc1–+) 0–1. croach – pierred, net–chess.com, 2017.

4.a4 e5 5.Bb2 Bd6 (better is 5...e4!?=) 6.Bd3+/– Qg5 7.g3 b6?? (better is 7...Qf6+/–) 8.Qf3+– Rb8 9.Qf5 Qf5 10.Bf5 Bb7 11.f3 Ne7 12.Be4 Be4 13.fe4 0–0 14.Nf3 f5 15.Ne5 Be5 16.Be5 d6 17.Bb2 fe4 18.Nc3 d5 (18...Rbe8 19.a5 Rf5 20.ab6 ab6 21.Ra4+–) 19.Ba3 Rf7 20.Be7 Re7 21.Nd5 Rf7 22.Rf1 Rd7 23.Nc3 Re8 24.a5 h6 25.Ra4 Red8 26.Ne4 Rd5 27.c4 Re5 28.ab6 ab6 29.Nc3 Rc5 (29...Kh7 30.Nd5 Rh5 31.Rf2+–) 30.d4 Rh5 31.h4 1–0. rcm06 (2180) – donex7 (1815), gameknot.com, 2014.

4.Bb2 Nd6 5.a4 (5.Nf3 a6+=) 5...e6 (5...Nf6 6.Nf3+=) 6.Nf3 Ne4 (6...Nf6 7.Be2+=) 7.h3 (7.Be2 d5+=) 7...Ngf6 (7...d5 8.Be2=) 8.Bd3 (8.d3 Nc5=) 8...Nd6 (8...d5 9.0–0=) 9.0–0 (9.Nc3 Qe7+=) 9...h6 (9...Nde4 10.Nc3 Nc5 11.Be2+=) 10.c4 (better is 10.Nc3+/–) 10...g5? (10...b6 11.Nc3+=) 11.Nc3 (11.e4!? e5+–) 11...g4 (11...Rg8 12.e4 g4 13.hg4 Rg4 14.e5+–) 12.hg4 Ng4 13.Nh2 (13.Ne4 f6 14.Nh2 Ne4 15.Qg4+– (15.Be4?! h5+/–; 15.Ng4?! h5+/–)) 13...Nh2= 14.Kh2 Rg8 (14...Qh4 15.Kg1 Rg8 16.Qe2=) 15.f4 (15.g3 f5+=) 15...Qh4= 16.Kg1 b6 (16...f5 17.c5 Nf7 18.Bf5 ef5 19.Nd5=) 17.Qf3 (17.Bh7!? Rg3 18.Ne4 Ne4 19.Be4=) 17...Bb7+= 18.Be4 (better is 18.Ne4!? Ne4 19.Be4+=) 18...Rg3–/+ 19.Qe2?? (better is 19.Bb7 Rf3 20.Bf3–/+) 19...Ne4–+ 20.Ne4 Be4 21.Rf2 Bc5 (better is 21...Bb4 22.d3 Bc5–+) 22.d3 (22.a5 ba5 23.Ra5 Ke7–+) 22...Bb7 (better is 22...Re3 23.d4 Re2 24.Re2 Qf4 25.dc5 Bd3–+) 23.d4 Be7 (23...Bb4 24.Ba3 Bc3 25.Bb2–+) 24.Rd1 (24.a5 f5–+) 24...0–0–0 25.d5 Rdg8 26.Rd3 (26.Qc2–+) 26...Rh3 0–1. Trkn – pfctillidie, itsyourturn.com, 2000.

4.Bb2 Nd6 5.Nf3 a6 +=.

4.Bb2 Nd6 5.Nf3 b6 6.c4 h5 7.d4 a5 8.Bd3 Nf6 9.Qc2 Rh6 (9...Bb7 10.Nbd2+/–) 10.Nbd2 c6 11.a4 Ng4 12.h3 Re6? (12...Nf6+–) 13.hg4 Rh6 (13...hg4 14.Ne5 g3+–) 14.g5 Rh8 15.g6 (better is 15.c5 Nb7 16.Ne5+–) 15...fg6 (15...f6+–) 16.Bg6 Nf7 17.Ne5 (17.Qf5 Qc7 18.Qf7 Kd8 19.Qe8) 17...Rh6 18.Bf7 1–0. Leoninus666 – Skystealer, playchess.de, 2003.

4.Bb2 Ngh6 5.Nf3 f6 6.d4 a6 7.ba6 ba6 8.Nbd2 Rb8 9.Rb1 Bb7 10.c4 d6? (10...c5 11.d5+=) 11.Bd3?? (better is 11.e4+–) 11...e5+/– 12.de5 (12.Qa4!? c6 13.0–0+/–) 12...de5+= 13.Qc2 g6 14.0–0 Bb4 (14...Qd7 15.Rfd1+/–) 15.a3 (15.e4!? Ne7 16.Be5+–) 15...Bd2 16.Qd2 (16.Nd2 Qe7+/–) 16...Bf3+= 17.gf3 0–0 18.Qc2 Kg7 19.Kh1 (19.Rfd1 Qc8 20.Qa4 Rd8+=) 19...c5 20.Rg1 Nh4 21.Rg3 f5?? (better is 21...Qd6=) 22.Be5+– Kf7 23.Rb8 Qe7 24.Rf8 Qf8 (24...Kf8 25.Qb2 Qd8 26.Bc2+–) 25.f4 (better is 25.Bf4 Kg8+–) 25...Qa8 26.Kg1 (better is 26.e4 Ng4 27.f3 Ne5 28.fe5 f4+–) 26...Nf3 27.Kf1 Nh2 28.Ke2 N6g4 (28...N2g4 29.Bb2 Qc6 30.Qc3+–) 29.Rh3 (better is 29.Bf5 Qh1 30.Qb1 Qb1 31.Bb1+–) 29...a5 (29...Qg2 30.Rh7 Kf8 31.Rh8 Ke7+–) 30.Rh7 Kg8 (30...Ke6 31.e4 Ne5 32.ef5 gf5 33.Bf5 Kf6 34.fe5 Kg5 35.Qd2 Kf5 36.Rh5 Kg6 37.Qg5 Kf7 38.Qf6 Ke8 39.Rh8 Kd7 40.Qd6) 31.Rg7 (better is 31.Rh8 Kf7 32.Ra8 Nf3 33.Ra7 Kf8 34.Qb2 Nd4 35.Bd4 Nf6 36.Bf6 g5 37.Qb8) 31...Kf8 32.Rg6 Qf3 33.Kd2 Qf2 34.Kc3 Qe1 35.Qd2 Qa1 36.Qb2 Qe1 (36...Qb2 37.Kb2 Ne5 38.fe5 Ng4+–) 37.Kb3 Qd1 (37...a4 38.Ka4 Qd1 39.Ka5 Qd2 40.Qd2 Ne5 41.fe5 Kf7 42.Rf6 Kg7 43.Qg2 Ng4 44.Qb7 Kg8 45.Qf7 Kh8 46.Qf8 Kh7 47.Bf5) 38.Bc2 (better is 38.Ka2 Qd2 39.Qd2 Ne5 40.fe5 Nf3 41.Qa5 Kf7 42.Rf6 Ke8 43.Qa8 Ke7 44.Bf5 Ne5 45.Qf8) 38...Qe2 39.Bd6 Kf7 (39...Ke8 40.Qh8 Kd7 41.Qh7 Ke8 42.Qe7) 40.Qf6 (40.Qg7 Ke8 41.Qe7) 40...Ke8 (better is 40...Nf6 41.Rf6 Kf6 42.Bc5 Nf1–+) 41.Qe7 1–0. Fournier,Frederic (1695) – foski, Active, 2006.

4.c4 c5 5.Bb2 e6 (5...d5 6.Nf3=) 6.Nf3 (6.e4 Nd4+=) 6...Nf6 (6...d5 7.Bd3=) 7.Be2 d5 8.d4 Be7 (8...cd4 9.Nd4 Nd4 10.Qd4 dc4 11.Qd8 Kd8 12.Bc4=) 9.0–0 0–0 10.Nbd2 b6 11.Ne5 Bb7 12.Nb3 Qc7 13.cd5 Bd5 14.dc5 Bb3 (14...bc5!? 15.Qc2 Bd6=) 15.Qb3+= Qc5 (15...bc5 16.Qc4+=) 16.Nc6 (16.Rac1 Qd5+/–) 16...Qd6 (16...a5 17.Rfc1 (worse is 17.Ne7 Qe7 18.Ba3 Nd6+=) 17...Qd6 18.Qc2+/–) 17.Bf3 (better is 17.Rfd1 Qc7 18.Ne7 Ne7 19.Rac1+–) 17...Rae8? (better is 17...Rac8+/–) 18.e4+– (18.Na7?! Nh4 19.Be2 Qd2+–; 18.Ne7?! Qe7 19.e4 Nh4+/–) 18...Nh4 19.e5 (19.Na7?! Qf4+=) 19...Nf3 20.Qf3 Qd5 21.Ne7 (worse is 21.ef6 Qf3 22.gf3 Bf6 23.Bf6 gf6 24.Na7 Ra8+–) 21...Re7 22.ef6 Rd7 (22...Qf3 23.gf3 (23.fe7?! Qe2 24.ef8R Kf8+–) 23...gf6 24.Ba3+–) 23.fg7 Rfd8 (23...Re8 24.Qe2 Qd2 25.Rfe1+–) 24.Bf6 (24.Bf6 Re8 25.Qd5 ed5 26.Rfe1+–) 1–0. Roggensack Hanspach,Peter – Frenzel,Lothar, corr SOK–89–40, 1990.

4.c4 d5 5.Bb2 e6 6.Nf3 Ngh6 7.Be2 (7.d4 Bb4 8.Bc3 Be7+=) 7...a6 (7...dc4 8.Bc4 Bd7 9.Nc3=) 8.a4 (8.cd5 ed5 9.ba6 ba6+=) 8...Bc5 (8...dc4 9.Bc4 ab5 10.ab5 Ra1 11.Ba1=) 9.0–0 (9.cd5 ed5 10.Qc2 Bd6+=) 9...dc4 (9...d4 10.Ba3 Bb6 11.c5+=) 10.Bc4+= ab5 11.ab5 Rb8 (11...Ra1!? 12.Ba1 Ng4+=) 12.Nc3 0–0 (12...Nd6 13.Be2 0–0 14.d4+/–) 13.d4 Bb4 (13...Be7 14.Qc2+/–) 14.Qa4 (14.Qb3 Bd6+/–) 14...Bd6 15.Ne4 Be7 (15...Bd7 16.Nd6 cd6 17.Bd3+/–) 16.Qc2 g5 (16...Ng4 17.Rfc1+/–) 17.Rfd1 (17.Nc5 Ng4 18.Rfc1 h6+–) 17...Ng4 (better is 17...g4!? 18.Ne5 f6+–) 18.d5 c6?? (18...e5 19.Be5 Ne5 20.Ne5 Nd6+–) 19.de6 Qb6 (19...fe6 20.Rd8 Bd8 21.Neg5 cb5 22.Bb3 Bg5 23.Ng5+–) 20.ef7 Rf7 21.Qc3 Nfe3 (21...Nd4+–) 22.Qh8 1–0. aschellen – QueenMermaid, internet, 2006.

4.c4 d5 5.cd5 Qd5 6.Nc3 (6.Qc2 Nh4 7.f3 Qg5+=) 6...Qd8 7.Nf3 (7.d4 e6+=) 7...Nf6 (7...e6 8.d4+=) 8.Bb2 (8.Qa4 Nd7+=) 8...e6 9.d4 Bb4 (9...Bd7 10.e4 Ne7 11.Ne5+=) 10.Bd3 Ne7 (10...0–0 11.0–0+=) 11.0–0 (11.a3 Bd6+/–) 11...0–0 (11...Ned5 12.Qb3+=) 12.Qc2 h6 (12...c6 13.e4+=) 13.Rac1 (13.a3 Ba5+/–) 13...Bd6 (13...Bd7 14.e4+/–) 14.Ne4 (14.e4!? Bf4 15.Rcd1+/–) 14...Ne4+= 15.Be4 f5 (15...a6 16.ba6 Ra6 17.a3=) 16.Bd3 Nd5 17.Bc4 (better is 17.Qb3+/–) 17...Nf6 (better is 17...Qe8!?+=) 18.Qf5+– Nd5 (18...Qe8 19.Qd3+–) 19.Qe4 Kh8 (19...Qe8 20.Bd5 ed5 21.Qd5 Be6 22.Qb7+/–) 20.Kh1 (20.Ne5 Kg8+–) 20...Nf6 21.Qg6 Qe8 (21...Bd7 22.Ne5 Be8 23.Qc2+–) 22.Qe8 Re8 23.Ne5 Kg8 24.Bd3 (24.f4 a6+–) 24...g5 (24...a6 25.ba6 ba6 26.Nc6+–) 25.Nc4 (25.e4 Kg7+–) 25...Be7 (25...Nd5 26.Nd6 cd6 27.Be4+–) 26.h3 (26.e4 Rd8+–) 26...Nd5 27.Ne5 Bd6 28.a3 (28.e4 Nf4 29.Rfd1 Rd8+–) 28...Kg7 (28...a6 29.ba6 ba6 30.Nc6+–) 29.Rc2 (29.g3 a6+–) 29...Rf8 (29...a6 30.Nc4+–) 30.Rfc1 b6 (30...Be5 31.de5 c6 32.bc6 bc6 33.Rc6 Rf2 34.Bd4+– (34.Rc8?! Rc8 35.Rc8 Rb2+=)) 31.g3 a6 32.Nc4 (32.e4 Ne7 33.d5 ed5 34.Rc7 Bc7 35.Rc7 Re8 36.ed5 Bh3+–) 32...Be7 (32...ab5 33.Nd6 cd6 34.e4+–) 33.e4 Nf6 34.Ne5 Bd6 (34...Ne8 35.Nc6 Rf7 36.ba6 Ba6 37.Ba6 Ra6 38.d5 Kf8 39.de6+– (39.Ne7?! Re7 40.Rd2 Ra4+/–)) 35.Nc6 (35.Rc7 Bc7 36.Rc7 Kg8+–) 35...ab5 36.e5 (36.Bb5?! Ne4 37.Kg2 Nf6= (worse is 37...Ba3 38.Ra1+/–)) 36...Ba3 37.ef6 Rf6 (37...Kf6 38.Ra1 Bb2 39.Ra8 Bd4 40.Bb5+– (40.Nd4?! Bb7 41.Nc6 Ra8+/–)) 38.Ra1 (better is 38.Ba3!? Ra3 39.Ne5 c6 40.Bb5 cb5 41.Rc8 Ra7+–) 38...b4 39.d5! ed5 (39...Bb7 40.Bd4 Re8+–) 40.Nb4!! (40.Nb4 Bb2 41.Ra8 Bh3 42.Rb2+–; 40.Bf6?! Kf6 41.Nb4 Bb7+–) 1–0. Sternik,Ryszard – Frenzel,Lothar, corr SOK–115, 1999.

4.c4 d6 5.Bb2 e5 6.Nf3 h6 (6...e4 7.Nd4=) 7.Qc2 Be7 (7...Nf6 8.d4+=) 8.Be2 Nf6 (8...c5 9.bc6 bc6 10.c5+–) 9.Bd3 (9.e4 Nd4 10.Nd4 ed4 11.Bd4 0–0+–) 9...Qd7 (9...g6 10.0–0+=) 10.0–0 (10.e4!? Nd4 11.Nd4 ed4 12.Bd4+–) 10...Bd8+= 11.Nc3 0–0 12.a4 Qe6 13.Bf5 (13.a5 a6+=) 13...Qf5= 14.e4 Qg6 15.Nh4 Qg4 16.g3 (16.Nf3 Be6=) 16...Nh5 (16...Be6 17.f3 Qh5 18.Ne2=+) 17.f3 (17.Ng2 Be6=) 17...Qh3 (17...Qe6!? 18.Ng2 Qc4=+) 18.Ng2= f5 19.d4 f4 (better 19...ed4 20.Ne2 fe4 21.fe4 Bf6 22.Nd4 Qg4=) 20.de5?? (20.g4 ed4 21.Nd1 d3+=) 20...de5?? (better 20...fg3 21.Ne3 de5–/+) 21.g4+– Bg4 (21...Nf6 22.Nd1 Be7 23.Be5 Bg4 24.c5+= (worse 24.fg4 Bc5 25.Nde3 fe3–/+)) 22.fg4 Qg4 23.Qe2?? (23.Ba3 Rf7 24.Kh1=+) 23...Qe2?? (better 23...f3 24.Rf3 Rf3–+) 24.Ne2+= f3 25.Ng3 Ng3 26.hg3 fg2 27.Rf8 Kf8 28.Kg2 (better 28.Be5!? Bf6 29.Bf6 gf6 30.Kg2+=) 28...Bf6=+ 29.Rf1 Ke7 30.Rd1 (30.a5 a6 31.Bc3 Rd8–/+) 30...Rd8 (30...a6 31.Ba3 Ke8 32.Rd3–/+) 31.Rd8=+ Kd8 32.Kf3 Kd7 33.Ba3 Be7 34.c5 (34.Bc1 Bc5–/+) 34...c6 35.Kg4 Ke6 (35...g6 36.Kh3–/+) 36.Kh5 Kf7 37.Kg4 Kg6 (37...g6 38.Kf3–/+) 38.Bb4 1–0. GuestJXBM – GuestXYTF, freechess.org, 2017.

4.c4 e5 5.Bb2 d6 6.d4 ed4 7.ed4 =.

4.c4 e5 5.Nc3 c6 (5...Nf6!?=) 6.Nf3+– Bd6 7.Qc2 Nfe7 (7...Ngh6 8.Bb2+–) 8.Bb2 (8.Ne4!? Bc7 9.c5 Nf6 10.Nd6 Bd6 11.cd6 Ng6+–) 8...Bc7 9.Be2 Ng6 (9...Nf6 10.d4 ed4 11.Nd4+–) 10.a4 (10.h4 h5+–) 10...a6 (10...Nf6 11.h4+–) 11.0–0 d5? (better 11...Nf6+–) 12.cd5+– cd5 13.Nd5! Ba5 (13...Qd5 14.Qc4 Double attack (14.Qc7 Discovered attack; 14.Qc7 Deflection; 14.Qc4 Decoy; 14.Qc7 Overloading)) 14.Nc3 (14.Ne5 Qd5 15.Bc4 Qd2 16.Bf7 Ke7 17.Qc5 Qd6 18.Qd6 Kd6 19.Rfd1 Ke7 20.Bg6 Nh6+–) 14...N8e7 15.d4 ed4 16.Nd4 0–0 17.Bf3 (17.Rfd1!? ab5 18.Ndb5 Qb6+–) 17...Ne5 18.Be2?? (18.Be4 f5 19.Nf3 fe4 20.Ne5 Bc3 21.Qc3 Nd5+–) 18...Bb6?? (18...N5g6 19.Rfc1 Ne5+–) 19.Ne4 (19.Qe4 Bd4 20.ed4 N5g6+–) 19...N7g6 (19...Bd7+–) 20.a5! Bd4 (20...Ba5 21.Ba3 Combination) 21.Bd4 (21.ed4!? Ng4 22.ba6 Nf6+–) 21...ab5 (21...Bf5 22.ba6 ba6 23.f3+–) 22.Bb5 (22.f4 Nc4 23.f5 Nge5+–) 22...Ra5? (better 22...Bf5!? 23.f3 Ra5 24.Ra5 Qa5+–) 23.Ra5+– Qa5 24.Qb3 (24.Qb2!? Bd7 25.Bd7 Nd7 26.Bg7 Re8+–) 24...Be6 25.Qb2 f6 26.Nc5 Bd5 27.e4 Bc6 28.Bc6 bc6 29.Ne6 (better 29.f4 Nf7 30.g3+–) 29...Rc8?? (29...Re8 30.Ra1 Qb5 31.Nc5=) 30.Ra1 (better 30.Qb7 Ne7 31.Qe7+–) 30...Qb5+– 31.Qc2 Rb8 32.h3 Qb3? (better 32...Kf7 33.Nc5 Kg8+–) 33.Qb3+– Rb3 34.Ra7 Rb4?? (34...Rd3 35.Rg7 Kh8 36.Rc7+–) 35.Rg7 (better 35.Ra8 Rb8 36.Rb8 Kf7 37.Nc5+–) 35...Kh8 36.Ra7 Kg8 37.Ra8 (37.f3 Nf4 38.Nf4 Rd4+–) 37...Kf7 38.Nd8 Kg7 39.Ra7 Kh6?? (better 39...Kg8 40.Ne6 h6+–) 40.Be3 Kh5 (40...Nf4 41.Bf4 Kg6 42.Be5 fe5+–) 41.Rh7 1–0. beyonders – torabi, gameknot.com, 2010.

4.c4 e6 5.Nf3 Qf6 (5...d5 6.d4=) 6.Nc3 Bb4 7.Bb2 Nh4? (7...Qg6 8.a3 Bc3 9.Bc3+=) 8.Nh4+– Qh4 9.Nd5! f6?? (9...ed5 10.Bg7 Combination) 10.Nb4 1–0. DEFFM – GuestNCWX, freechess.org, 2018.

4.Bc4 d5 5.Bb3 =+.

4.Bc4 d5 5.Be2 =+.

4.Bc4 e6 5.Bb2 (5.Nf3 d5 6.Be2 Bd6=) 5...Qh4 (5...a6 6.ba6 ba6 7.Nf3=) 6.Bb3 (6.Bd3 d5=) 6...Ngh6 (6...Qg5 7.Qf3=) 7.Nf3 Qe4 (7...Qg4 8.0–0=) 8.0–0+= Bd6 (8...Nh4 9.Ne1+=) 9.Nc3 Qg4 10.h3 Qh5 (10...Qg6 11.Bc4+=) 11.Ne4 Nh4?? (better is 11...0–0+=) 12.Nh4+– (12.Nd6?! cd6 13.Kh1 Nf3 14.Bg7 Rg8 15.Bh6 Qh6 16.Qf3 d5+–) 12...Qh4 13.Bg7 Qe4 14.Bh8 Nf5 15.Qh5 Nh4 16.f3 (16.f3 Nf3 17.Rf3+–) 1–0. Wall,Bill – Adamas, internet, 2002.

4.Bc4 h6 5.Nc3 Nf6 6.Nf3 d5 7.Bb3 e6 8.0–0 Bd6 9.Bb2 0–0 10.Ne2 Bd7 11.c4 d4 (better is 11...dc4!? 12.Bc4 c6=) 12.Ned4+/– (worse is 12.Bd4 Nd4 13.ed4 Ba3+=) 12...Nd4 13.Nd4 Ne4 (13...e5 14.Ne2+/–) 14.d3 Bh2?? (better is 14...Nc5+/–) 15.Kh2+– Qh4 16.Kg1 e5 (16...Nf6+–) 17.Nf3 Qf6 (17...Qh5 18.de4 Bg4 19.Qe2+–) 18.Be5 Qg6 (18...Nf2 19.Qe2 Nh3 20.gh3+–) 19.de4 (19.de4 Bg4 20.Bc7+–) 1–0. Wall,Bill – Ted, chess.com, 2009.

4.Bd3 d5 5.Nf3 Nd6 6.0–0 Bg4 7.Bb2 Nf6 (7...e6 8.h3 Bf5 9.Bf5 Nf5 10.d3=) 8.a4 (8.h3 Bh5=) 8...e6 (8...Nfe4 9.Be2=) 9.h3 (9.a5 a6 10.ba6 ba6=) 9...Bf5 10.Bf5 Nf5 11.Qe2 Bc5 12.g4 (12.a5 a6=) 12...Nd6 13.Ne5 (better 13.a5=) 13...Nc4 (better 13...Nfe4!?=+) 14.Nc4+– dc4 15.Qc4 b6 (15...Qe7 16.a5 0–0 17.a6+–) 16.d4 (16.a5 0–0+–) 16...Bd6 17.Qc6 Ke7 (17...Nd7!?+–) 18.e4+– Re8? (better 18...Nd7+–) 19.e5 Ng4 (19...Kf8+–) 20.hg4 Bb4 (20...Rc8 21.Qh1+–) 21.c3 Ba5 (21...Bd6+–) 22.Ba3 (22.Ba3 Bb4 23.Bb4 Qd6 24.Bd6 cd6 25.Qd6) 1–0. DEFFM – oveis, freechess.org, 2018.

4.Bd3 d5 5.Bf5 Bf5=+ 6.Nf3 Qd7 (6...a6 7.ba6 Ra6 8.Bb2=+) 7.Qe2 (7.Nc3 a6=+) 7…Bc2 (8.d3 Ba4=+). Keg – Karen7, Caissa's Web Live Game, 2004.

4.Bd3 d6 5.Nf3 Nf6 6.Bb2 e5 7.e4 (7.Nc3 g6+=) 7...Nh6 (7...Ne7 8.Nc3+=) 8.0–0 Bg4 (8...Be7 9.Nc3+–) 9.h3 Bf3 (9...Be6 10.Nc3+–) 10.Qf3+– (worse 10.gf3 Nh5 11.Kh2 Qh4=+) 10...Qd7 (better 10...Be7!?+–) 11.g4 0–0–0 (11...d5 12.Nc3 Bb4 13.ed5 0–0–0+–) 12.g5 Nhg4 (12...d5 13.Nc3 (13.gf6 gf6 14.ed5 e4 15.Be4 Rg8 16.Kh1 Qb5+–; 13.gh6?! de4 14.Be4 Ne4 15.Qe4 Qh3+–) 13...d4 14.Ne2+– (14.gf6?! dc3 15.fg7 Bg7 16.Bc3 f6+–; 14.gh6?! dc3 15.Bc3 Qe6+–)) 13.hg4 Ng4 (13...Ne8 14.Qf5+–) 14.Qg3 (better 14.Qf5 Qf5 15.ef5 e4 16.Be4 d5+–) 14...Be7 (14...d5 15.Nc3 de4 16.Be4+–) 15.Be2 h5 16.f3 h4 (16...Nh6 17.gh6 Rh6 18.Kh2+–) 17.Qg4 Qg4 18.fg4 Bg5 (18...Rdf8 19.d4 Bg5 20.de5 Be3 21.Kh1 de5 22.Ba3+–) 19.Rf7 Bf6 (19...Bh6 20.Bc3 Rdf8 21.Rf8 Rf8 22.Na3+–) 20.Nc3 h3 (20...Rdf8 21.Rf8 Rf8 22.Rf1+–) 21.Nd5 (21.Rf1 Rd7 22.Rd7 Kd7+–) 21...h2 (21...Rd7 22.Rd7 Kd7 23.Rf1+–) 22.Kh1 Rd7 23.Rd7 Kd7 24.Rf1 Bg5 (24...Bd8+–) 25.Rf7 Kd8 26.Rc7 Bd2 27.Rb7 Rh7 28.Ra7 Kc8 29.Ne7 (29.b6 g6 30.Ba6 Kd8 31.Rh7 Bg5 32.b7 Ke8 33.b8Q Bd8 34.Qd6 Bg5 35.Bb5) 29...Kb8 (29...Kd8 30.Nc6 Ke8 31.b6 Be3 32.Ra8 Kf7 33.b7 Kg6 34.b8Q Bf4 35.Qd6 Kg5 36.Qe7 Kh6 37.Qh4 Kg6 38.Ne7 Kf7 39.Bc4) 30.b6 Be3 (30...g6 31.Nc6 Kc8 32.Rh7 d5 33.b7) 31.Nc6 Kc8 32.Rc7 1–0. DEFFM – GuestKZYT, freechess.org, 2019.

4.Bd3 e5?? 5.Bf5+– Nf6 (5...Nh6 6.Be4+–) 6.Nf3 (6.Bb2 g6 7.Bh3 e4+–) 6...g6 7.Bh3 e4 8.Ne5 Qe7 (8...d6 9.Bc8 Rc8 10.Ng4+–) 9.Bb2 d6 10.Bc8 Rc8 11.Nc4 h5 12.h4 Qe6 13.Qe2 d5 14.Na5 b6 15.Nc6 Bc5 16.Na7 Rd8 17.Nc6 Rc8 18.Bf6 Qf6 19.Nc3 g5 20.Nd5 Qa1+/– 21.Qd1 Qd1 22.Kd1 0–0? 23.d3 Ra8 24.de4 Bd6 25.e5 Ba3 26.Nc7 Rac8 27.Nd5 Ra8 (28.Nb6 Rae8+–; 27...g4 28.Nb6 Rc7 29.Nd5+–). vulpo – BIGAL 1971, ChessWorld.net, 2005.

4.Bd3 Nh4 5.g3 Ng6 6.Bb2 =.

4.d4 a6 5.Nf3 ab5 6.Bb5 Ra5 7.a4 c6 8.Bd3 e6 9.Ba3 (9.e4!? Nh4 10.Bd2+=) 9...Ra4= 10.Bf5 ef5?? (10...Qa5 11.c3 Ra3 (11...ef5? 12.Bf8 Ra1 13.Bg7+–) 12.Na3 Qc3 13.Ke2 Ba3+/–) 11.Bf8+– Ra1 12.Bg7 Qa5 (12...Nf6 13.Bh8 Ne4 14.Nfd2+–) 13.c3 (13.Nfd2 Nf6 14.Bh8 Ne4+–) 13...d5 (13...Qb5 14.Nfd2 Nf6+–) 14.Bh8 f4 15.0–0 Bf5 16.ef4 (16.Nfd2 fe3 17.Nb3 Rb1 18.Qb1 Bb1 19.Na5 Bd3+–) 16...Bb1?? (better is 16...Rb1 17.Qe2 Ne7 18.Rb1 Bb1+/–) 17.Qe1 (17.Qc1 Ne7+–) 17...Ne7 (17...Kd8 18.Qc1+–) 18.Bf6 Qa3 19.Nd2 Qd6 20.Be7 (20.Nb1?! Qf6 21.Qd2 b6+=) 20...Qe7 21.Qe7 (21.Nb3!? Ra2 22.Qb1 Re2+–) 21...Ke7 22.Rb1 Ra2 (22...Rb1 23.Nb1 Kd6 24.Kf1+–) 23.Rb7 Kd6 1–0. Fournier,Frederic – Chalvet,Philippe, Partie Libre (Active), 1994.

4.d4 g6 5.e4+– Nd6 6.e5 (6.Nc3 c6 7.bc6 dc6+–) 6...Nf5+= 7.Nf3 e6 (7...d6 8.Bd3+=) 8.Bd3+– Nh4 (8...d5 9.0–0+–) 9.0–0 h6 (9...Bg7 10.Nbd2+–) 10.c4 (10.Nbd2+–) 10...c6? (10...Nf3!? 11.Qf3 Ne7+–) 11.Nc3 cb5 (11...f5 12.Nd2 c5 13.dc5 Bc5 14.g3+–) 12.Nh4 (12.cb5?! d5+–) 12...Qh4 13.Nb5 Qd8 14.d5 a6 15.Qa4 (better 15.Nd6 Bd6 16.ed6+–) 15...ed5 (15...Bg7 16.Nd6 Kf8+–) 16.cd5 Bg7 (16...Bc5 17.Be3 ab5 18.Qa8 Be3 19.fe3 Ne7+–) 17.Nd6 Kf8 18.Ba3 Ne7 19.Qf4 f5 (19...Kg8 20.Qf7 Kh7+–) 20.ef6 Kg8 (20...Nf5 21.Nf5 Kg8 22.Ne7 Qe7 23.fe7 Kh7 24.Qf7 Re8 25.Qg6 Kg8 26.Qe8 Bf8 27.ef8Q) 21.fg7 Nf5 (21...Kh7 22.Bc1 Nf5 23.Nf5 Re8 24.Qh6 Kg8 25.Qg6 Qg5 26.Bg5 d6 27.Nh6) 22.gh8Q Kh8 23.Nf5 gf5 (23...Qf6 24.Qh6 Kg8 25.Ne7 Qe7 26.Be7 b5 27.Bg6 d6 28.Qh7) 24.Qh6 Kg8 25.Qg6 Kh8 26.Bb2 (26.Bb2 Qf6 27.Bf6) 1–0. GuestSBVJ – GuestPMVT, freechess.org, 2020.

4.Qf3 e6 5.Bd3 g6 6.Bb2+= f6 7.Ne2 d5 8.e4 de4 9.Be4 Nd6 10.Bd3 a6 (10...e5 11.Nbc3=) 11.a4 (11.ba6!? Rb8 12.Bd4+–) 11...ab5= 12.ab5 c6?? (better 12...Ra1 13.Ba1 e5=) 13.Ra8+– Bh6 (13...Kf7 14.Nbc3+–) 14.0–0 (14.bc6 bc6 15.Ba6 Qd7 16.Bc8 Nc8 17.Bf6 Nf6 18.Qf6 Rg8+–) 14...g5 (14...cb5 15.Nd4 Kf7+–) 15.bc6 bc6 16.Qc6 (better 16.Ba3 Bf8 17.Bd6 Qd6 18.Rc8 Kd7 19.Ra8+–) 16...Bd7 (16...Qd7 17.Qc5 Ne7 18.Bf6 Rf8+–) 17.Qd6 (better 17.Rd8 Kd8 18.Qd6+–) 17…Qa8 ½–½. aravind555 – pabloventos, lichess.org, 2018.

4.Nf3 b6 5.Bd3 d5 6.e4 de4 (6...Nd6!? 7.ed5 a6 8.ba6 Nf6+/–) 7.Be4+/– Nf6?? (better is 7...Rb8+/–) 8.Ba8+– g6 (8...Bd7 9.Bc6+–) 9.Bc6 Bd7 10.Bd7 Qd7 11.d4 Bg7 12.Na3 Ne4 13.Bb2 c5 14.bc6 Qc6 15.0–0 0–0 16.Re1 g5 17.d5 Qc5 18.Bg7 Nf2 19.Bd4 Nd4 20.Qd4 Qd4 21.Nd4 Ng4 22.Re7 a5 23.Rf1 f6 24.Ne6 Rf7 25.Re8 (25...Rf8 26.Rf8) 1–0. mikekelly666 – Kunk, ChessWorld.net, 2005.

4.Nf3 b6 5.e4 Nd6 6.e5 Nb7 (6...Nf5 7.Bd3 e6 8.Be4+–) 7.d4+– e6 8.Bd3 Bb4 9.Nbd2 Bd2 (9...Ne7 10.0–0+–) 10.Bd2 (10.Kd2?! Na5+–) 10...Qe7 (10...h6 11.0–0+–) 11.0–0 Na5 12.Ng5 h6? (12...Bb7 13.Qh5 g6+–) 13.Qh5 Bb7 (13...hg5 14.Qh8 Qf8+–) 14.Nf7! Qf7 15.Bg6 Qg6 (15...0–0–0 16.Bf7 Ne7 17.Ba5 ba5 18.c4+–) 16.Qg6 Kd8 (16...Kf8 17.Bb4 Ne7 18.Be7 Kg8 19.f4+–) 17.Qg7 Be4 18.Qf8 1–0. Pierre – Eenstein, internet, 2019.

4.Nf3 c6 5.a4 Qa5 (5...Nf6 6.Nc3 d5 7.Bb2+=) 6.Bb2 cb5? (better 6...Nf6+=) 7.ab5+– Qb4 (7...Qc7 8.e4 Nd6 9.Ra4+–) 8.Ba3 Qa5 9.c4 (better 9.Nc3 Qd8 10.e4+–) 9...Nd6?? (better 9...Nf6+–) 10.Bd3 (10.Nc3 Qc7 11.b6 Qb8+–) 10...Nc4 (10...e6+–) 11.Bc4 d6 (11...e6 12.Bd3+–) 12.Ng5 (better 12.Nc3 Qc7 13.Qb3+–) 12...Be6 (12...e6 13.Qh5 Nh6 14.Ne6 Be6 15.Be6 Qb6+–) 13.Be6 fe6 14.Qf3 Rc8 (14...Nf6 15.Qb7 Rd8 16.Qc6 Rd7+–) 15.Qf7 Kd7 16.Qe6 Kd8 17.Nf7 Kc7 18.Bd6! ed6 19.Ra5 Nf6 20.Nh8 Kb6 21.Qc8 Ka5 22.Qe8! (22.Qe8 Ne8 23.Nc3+–) 1–0. DEFFM – Trfd, freechess.org, 2019.

4.Nf3 d6 5.Be2 Bd7? 6.Bb2 (6.g4 Nfh6 7.g5+=) 6...e5= 7.e4 (7.Nc3 Nf6=) 7...Nh4 8.Nh4 Qh4 9.Nc3 Nf6 10.Bf3 Be7 11.0–0 0–0 12.g3 Qh3 13.Bg2 Qg4 14.h3 (14.Qg4 Bg4 15.f4 a6=) 14...Qd1 15.Rad1 c6 16.a4 a6 17.Ra1 (17.b6 a5=) 17...ab5 18.ab5 cb5 19.Ra8 Ra8 20.Ra1 Ra6 21.Ra6? (better 21.f4!?=+) 21...ba6–+ 22.Ba3 (22.f4 b4 23.Ne2 ef4 24.gf4 a5–/+) 22...Ne8 (22...a5!? 23.Bb2–+) 23.Bf1 (23.Nd5 Kf8–/+) 23...Be6 24.h4 Nc7 25.Bb4 g6 26.Ba5 Bd8 27.Bc7 (27.Nd5!? Nd5 28.Bd8–/+) 27...Bc7–+ 28.Nd5 Bd5 29.ed5 Kg7 30.Kg2 f5 31.Kf3 Kf6 32.g4 fg4 33.Kg4 h5 34.Kf3 Bb6 35.c3 e4! 36.Ke4 (36.Kg3 Ke5–+) 36...Bf2 37.c4 bc4 38.Bc4 a5 39.Bb5 Bh4 40.d3 (40.Be8 Be1–+) 40...Bg3 (40...g5!? 41.Bd7–+) 41.Kf3 Be5 42.Ke4 g5 43.d4 Bh2 44.Bd7 g4 45.Bf5 (45.Bb5–+) 45...Kg5 (better 45...a4 46.Bg4 hg4 47.Kd3–+) 46.Bg6 h4 (46...Kg6 47.Kd3 g3 48.Kd2 g2 49.Kc3 g1Q 50.Kc2 Qd4 51.Kb3 a4 52.Kc2 h4 53.Kc1 Bf4 54.Kc2 Qc4 55.Kd1 Qd3 56.Ke1 Bg3) 47.Bh7 a4 48.Ke3 a3 49.Bb1 h3 50.Kf2 g3 51.Kf1 g2 52.Kf2 (52.Ke2 g1Q 53.Bh7 a2 54.Be4 a1Q 55.Bb1 Qab1 56.Kf3 Qd3) 52…g1Q (52...g1Q 53.Ke2 Qb1 54.Kd2 a2 55.Ke2 Qc2 56.Kf3 a1Q 57.Ke3 Qac3) 0–1. Atotheking (1690) – Boumia2020 (1800), lichess.org, 2020.

4.Nf3 d6 5.Be2 e5= 6.0–0 e4 7.Ne1 (7.Nd4 d5=) 7...d5 8.Bb2 Nf6 9.c4 Bd6 (9...dc4 10.Bc4 Be7 11.Nc3=) 10.cd5 h5? (10...Nd5!? 11.Qc2 Qe7=) 11.d3 (11.Qc2!?+–) 11...Bh2 12.Kh2 Ng4 13.Kg1 Qh4 (13...Qd6 14.f4 (14.Bg4 hg4 15.f4 g3 16.Bg7 Ng7–+) 14...Nge3 15.Qa4 Nf1 A) 16.Qe4? Kd8 17.Bf1 Qb6 18.Kh2 Qf2–+ (18...Qb5?! 19.Bc3=+); B) 16.Bf1 Qb6 17.Kh2=+) 14.Be5+= Ne5 15.de4 Ng4 (15...Qe4!? 16.Nd2 Qb4+=) 16.Nf3+– Qf6 17.Qb3 (17.ef5?! Qa1 18.Qc2 Qf6=) 17...Qa1 18.Nc3 Qf1 19.Bf1 Nd6 20.e5 Nf5 21.e6 (21.b6 cb6 22.Bb5 Bd7+–) 21...fe6 22.de6 Ke7? (better 22...Ne7+–) 23.Nd5 Kd6 (23...Kd8 24.Qc2 Be6 25.Qc7 Ke8+–) 24.Qb4 Kd5 (24...Ke6 25.Nc7 Kf7 26.Na8 Rd8+–) 25.Bc4 Ke4 26.Qb1 1–0. GuestWKWG – guestbernard, freechess.org, 2019.

4.Nf3 d6 5.e4 Nfh6 6.Nc3 e6 7.Bc4 a6 8.ba6 ba6 9.Rb1 Bb7?? (better is 9...Nf6 10.0–0 Be7+–) 10.Rb7 Qc8 11.Rb1 Rb8 (11...Nf6 12.0–0+–) 12.Ba6! Qa6 (12...Qd8 13.Bb5 Rb5 14.Rb5+–) 13.Rb8 Ke7 14.Nb5 Qc6 (14...Kd7 15.Nc7 Qc4 16.Nb5 Qe4 17.Kf1+–) 15.0–0 Qe4 16.d3 Qa4 17.Nfd4 Qa6 18.Qf3 e5 19.Nc7 (19.Bg5 Nf6 20.Nc7 Qc8 21.Rc8 Kd7 22.Bf6 ed4 23.Ne8 Kc8 24.Qc6 Kb8 25.Rb1 Ka7 26.Bd4) 19...Qa7 (19...Qc4 20.Re8 Kd7 21.Qa8 Qd4 22.Qc8 Kc6 23.Nd5 Kb5 24.Qb7 Qb6 25.Qb6 Ka4 26.Ra8) 20.Re8 Kd7 21.Qc6 1–0. marekt (2065) – markomajka, gameknot.com, 2014.

4.Nf3 e5 5.Ne5 d6 6.Nf3 g6 (6...Nf6 7.d4+–) 7.Nc3 (7.d4 Nh4+–) 7...a6 (7...Be6 8.e4 Nh4 9.Nd4+–) 8.ba6 ba6 9.Rb1 Nf6 (9...Bg7 10.Bb2+–) 10.e4+– Be7? (better 10...Ne7+–) 11.ef5 gf5 (11...Bf5 12.Nd4 Bd7 13.Qf3+–) 12.Bd3 Be6 (12...d5 13.0–0+–) 13.Nd4 Ng4 (13...Rg8 14.Qf3+–) 14.Bf5 Ba2 (14...Bf5 15.Nf5 Rg8+–) 15.Nc6 Bb1 (15...Nf2 16.Qf3 Bh4 17.Nd8 Nh1 18.g3 Ng3 19.hg3 Bg3 20.Qg3 Rd8 21.Qg7+–) 16.Bg4 Bf6 (16...Rb8 17.Ba3+–) 17.Nb1 Qd7 18.Qe2 Qe6 19.Be6 fe6 20.Qe6 Kf8 21.Qf6 Kg8 (21...Ke8 22.Qe7) 22.Ne7 1–0. Janek – strahar, internet, 2016.

4.Nf3 g6 5.Bb2 (5.e4 Ng7+–) 5...f6 (5...Bg7!? 6.Qc1 e5 7.Be5 Nf6+=) 6.e4 Nd6 7.e5 (7.Bd3!?+–) 7...fe5+= 8.Bd3 Bg7 9.0–0 (9.Be5 Be5 10.Ne5 Nf7+=) 9...e6 (9...Nf7!?=) 10.Be5 Be5 11.Ne5 Qf6 12.f4 b6 13.Nc3 Bb7 14.a4 g5? (better 14...Qe7+–) 15.Qh5+– Kd8 16.Qg5 Ke7 (16...h6 17.Qh5+–) 17.a5 Nh6 (17...Rf8+–) 18.a6 Rhg8 (18...Bg2 19.Qf6 Kf6 20.Kg2 Ke7+–) 19.ab7 Rg5 (19...Nb7 20.Qh5 Nd6 21.Bh7 Rg7 22.Ng6 Rg6 23.Bg6 Rg8 24.Qh6 Rg6 25.Qh7 Rg7+–) 20.ba8Q Qg7 21.fg5 Qe5 22.Qf8 1–0. DEFFM – GuestDCTP, freechess.org, 2019.

4.g4 Nh4 5.Nf3 Nf3 6.Qf3 =.

4.Bb2 a6

5.a4 ab5 6.ab5 Ra1 7.Ba1 b6 8.c4 Nf6 9.Nc3 g6 10.Nf3 (10.e4 Ng7+=) 10...Bg7 (10...Bb7 11.e4 Ng7 12.e5+=) 11.e4+– Nh6 12.h3 (12.d4 0–0+–) 12...d6 (12...Bb7 13.g4 Nhg8 14.Bg2+=) 13.d3 (13.d4 Bb7 14.Bd3 0–0+–) 13...Nd7 (13...e5 14.Be2+=) 14.d4 0–0 15.Bd3 e6 (15...e5 16.Nd5+=) 16.0–0 e5 (16...Bb7 17.Qe2+=) 17.Nd5+– ed4 (17...Bb7 18.de5 Ne5 19.Ne5 de5 20.Qd2+–) 18.Nd4 (18.Bd4 Ne5 19.Ne5 de5+–) 18...Nc5 (18...Bb7!?+=) 19.Nc6+– Qd7 (better 19...Qg5!? 20.f4 Qh4 21.Bg7 Kg7 22.Nc7 Bh3+–) 20.Nf6+– Bf6 21.Bf6 Re8 22.Bg5 1–0. pierred – croach, net–chess.com, 2017.

5.a4 ab5 6.ab5 Ra1 7.Ba1 c6 8.c4 (8.Nf3 d5+=) 8...cb5 9.cb5 Nf6 10.Nc3 (10.Nf3 d5+=) 10...Qb6 (10...e5 11.g4 Nh4 12.g5=) 11.Nf3 (11.Qc2 d6+=) 11...d6 (11...d5 12.Bd3+=) 12.Be2 (12.Qc2 Bd7+=) 12...Bd7 (12...e5 13.0–0+=) 13.0–0 (13.Qa4 e6+–) 13...e5 (13...d5 14.Na4 Qa5 15.Bf6 ef6 16.Qc2+–) 14.Qa4 Be7 (14...Nh6 15.Qa8 Qd8 16.Qb7+–) 15.Qa8 (15.g4!? e4 16.Ne1+– (16.gf5?! ef3 17.Qa8 Qd8 18.Qd8 Kd8 19.Bf3 b6+–)) 15...Bd8+= 16.e4 Ne7 17.Na4 (17.d4 Ng6+=) 17...Qc7 (17...Qa5 18.Qa5 Ba5=) 18.b6 (18.d4 0–0=) 18...Qc6 (18...Qc8!? 19.Qa5 Qc6–/+) 19.Nc3= 0–0 (worse 19...Ne4 20.Bb5 Qc8 21.Bd7 Kd7 22.Qa4 Qc6 23.Qc6 Kc6 24.Ne4+–) 20.Qa3 (20.Bb5!? Qc8 21.Qa3 Bb6 22.Qd6 Bb5 23.Nb5=+) 20...Bb6 21.Bb5 (21.Ne5 de5 22.Qe7 Bd4=+ (worse 22...Ne4 23.Bb5 Qc5 24.Qd7 Nc3 25.Bd3=)) 21...Qc7 (21...Qc5 22.Qc5 Bc5 23.Bd7 Nd7 24.Nb5–/+) 22.Bd7 Qd7 23.Na4 (23.Qb3 Bc5–/+) 23...Ra8 (23...Bf2!? 24.Kf2 Ra8 25.Nb6 Ra3 26.Nd7 Nd7 27.Bb2–+) 24.Nb6–/+ Ra3 25.Nd7 Nd7 26.d4 f6 (26...ed4 27.Nd4 Nc5 28.f3–/+) 27.Bb2 (27.Rb1 Ra2–/+) 27...Ra2 28.Rb1 b6 29.Bc3 (29.Kf1 Kf7–/+) 29...Rc2 30.Bb4 Nc6 31.Bd6 (31.Kf1 ed4 32.Bd6 Nc5–+) 31...ed4 32.h3 Kf7 (32...Nc5 33.e5–/+) 33.Rd1 (better 33.Bc7–/+) 33...Ke6 (33...Rc4 34.Kf1–+) 34.Bg3? (34.Nd4 Nd4 35.Rd4 g6=+) 34...h6 (better 34...Rc4–+) 35.Nd4=+ Nd4 36.Rd4 Ne5 (36...g6 37.f3=+) 37.f4 (37.Rb4 Nc4=) 37...Nc4=+ 38.f5 Ke7 39.Rd5 (39.Bf2 Ke8=+) 39...Rc1 (39...Ne3!? 40.Bd6 Ke8–/+) 40.Kh2 (40.Kf2 h5=) 40...Ne3 (40...Rb1 41.Bf2=) 41.Bd6=+ Kf7 (41...Ke8 42.Bf4 Nd5 43.Bc1=+) 42.Rb5= Nf1 43.Kg1 Nd2 44.Kf2?? (better 44.Kh2=+) 44…Ne4–+. GuestXHBX – pupici, freechess.org, 2016.

5.a4 ab5 6.ab5 Ra2?? 7.Ra2+– 1–0. GuestNPTV – GuestTXWC, freechess.org, 2017.

5.a4 ab5 6.Bb5 Nd6 7.Be2 b5 (7...Nf6 8.Nf3+=) 8.a5 (better 8.ab5!? Bb7 9.Ra8 Ba8 10.Nf3+–) 8...Bb7 9.Nf3 e6 (9...c5 10.a6 Ra6 11.Ra6 Ba6 12.0–0=+) 10.0–0 (10.Bd4 Ne7=) 10...Bf3 (10...c6 11.Bc3=) 11.Bf3 (worse 11.gf3 c6=+) 11...Nc4?? Exerts pressure on the isolated pawn (11...c6 12.Bc3=) 12.Bc3?? (better 12.Ba8 Qa8 13.Bc3+–) 12...Ra6 (12...c6!?+=) 13.d3 Nd6 14.Nd2 Qb8 (14...c6 15.Nb3+–) 15.Bb2 Ne7 16.Re1 Nc6 17.Nb3 Qa7 18.Qd2 f6 19.Bc6 dc6? (better 19...Rc6 20.Bd4 Qa8+–) 20.Nc5?? (better 20.Bd4 Qa8 21.Nc5+–) 20...Qc5–+ 21.Ba3 Qa7 22.Bd6 Bd6 23.c3 (23.Reb1 0–0–+) 23...Ra5 24.Rab1 0–0 25.e4 Ra2 26.Qe3 (26.Rb2 Ra8–+) 26...Bc5 (better 26...Qe3!? 27.Re3 Rfa8 28.Kf1–+) 27.d4 Bb6 28.Qg3 (28.Qh3 e5 29.Red1 Kh8–+) 28...e5! 29.Red1 (29.de5 Bf2 Double attack (29...Bf2 Pinning; 29...Bf2 Deflection)) 29...Rd8 30.Rd3 c5 (better 30...ed4 31.Qg4 Ra1 32.Qd1 Rb1 33.Qb1–+) 31.d5 (31.de5 Rd3 32.Qd3–+) 31...c4 32.Rf3 (32.Re3 Be3 33.Qe3 Qe3 34.fe3 Rb8–+) 32...c6! 33.Rf6 (33.dc6 Ra1 Combination) 33...Bf2! 34.Rf2 Rf2 (better 34...Rf8 35.Kh1 Qf2 36.Qf2 Raf2–+) 35.Qf2–/+ Qf2 (35...cd5?? 36.Qa7 de4 37.Qc7+–) 36.Kf2 cd5 37.Rd1? (better 37.Rb5 d4 38.Rc5 dc3 39.Rc4 Rd2 40.Kf3–+) 37...d4 38.Ke2 d3 39.Kd2 Rf8 40.Ke3 Kf7 41.Rb1 Rb8 42.Rb4 Kg6 43.g3 Kg5 44.h3 h5 45.Rb1 Rb6 46.Kf3 (46.Rb2 h4 47.g4 Rd6–+) 46...g6 (46...h4 47.gh4 Kh4 48.Ke3–+) 47.Ke3 (47.h4 Kf6 48.Ke3 Kg7–+) 47...Kh6 (47...h4 48.gh4 Kh4 49.Ra1–+) 48.Kf3 (48.h4 g5–+) 48...g5 (better 48...Rd6 49.Ke3 b4 50.Kd2 bc3 51.Kc3–+) 49.Kg2 (49.Ke3–+) 49...g4 (better 49...b4 50.g4–+) 50.h4 (50.hg4 Rd6 (worse 50...hg4 51.Kf2–+) 51.Kf3 b4 52.Rb4 d2–+) 50...Kg6 (better 50...b4–+) 51.Kf2 Kh6 (51...Rf6!? 52.Ke1 Rf3 53.Rb5 Re3 54.Kd1 Re4 55.Rb6 Kf5 56.Rb4–+) 52.Ke3?? (52.Kg2 b4 53.Kf2 Rd6 54.Rb4 d2–+) 52...Kg6 53.Ra1?? (53.Kf2 b4 54.Rb4 Rb4 55.cb4 Kf6–+) 53...Kh6 54.Ra8?? (54.Rb1 Kg7–+) 54...Kg6 (better 54...Rd6!? 55.Kd2 b4 56.Ra1–+) 55.Rg8?? (55.Ra1 Rf6–+) 55...Kh6 56.Rh8?? (56.Ra8 Rf6 57.Rh8 Kg7 58.Rb8 Rf3 59.Kd2 Rg3 60.Rb5 Rg2 61.Kd1 Rg1 62.Kd2–+) 56...Kg7–+ 57.Rh5 (57.Rc8–+) 57...Kg6 (better 57...Rd6 58.Kd2 b4 59.Rg5 Kh6–+) 58.Re5=+. alessandrocarvalhaes (1730) – Sudba123 (1610), lichess.org, 2018.

5.a4 d5 6.Nf3 c5 (6...ab5 7.ab5 Ra1 8.Ba1=) 7.c4 d4 8.ed4 Nd4 9.Nd4 cd4 10.d3 (better is 10.Bd3!?+=) 10...e5+= 11.g3 (11.Qe2 Bb4 12.Nd2 f6–/+) 11...Nf6 12.Bg2 Rb8 (better is 12...ab5!? 13.Nd2 b4–/+) 13.0–0= Bg4? (13...Bd6 14.Nd2=) 14.Bf3 (better is 14.Qe1!? Nd7 15.Bd4+–) 14...Bf3= 15.Qf3 Bb4 16.Ba3 Qe7 17.Bb4 Qb4 18.ba6 ba6 19.Qc6 Nd7 20.f4 Rb6?? (better is 20...Qc5 21.Qe4 0–0=) 21.Qc8+– Ke7 22.Qh8 Qb2 23.Na3 (better is 23.Nc3 dc3 24.Qg7 Qa1 25.Ra1+/–) 23...Nc5?? (better is 23...Rh6 24.Nc2! Qc2+/–) 24.Qg7+– ef4 (24...Ne6 25.Qe5 Qd2 26.Rab1 Rb1 27.Rb1 Qe3 28.Qe3 de3 29.Nc2+–) 25.Qe5 Re6 26.Qc5 Kd7 27.Qa7 (27.Rab1 Ke8 28.Rb2 Rb6 29.Rb6 Kd8 30.Re1 fg3 31.Rd6) 27...Ke8 28.Qa8 (28.Rab1 Qb4 29.Rb4 Kf8 30.Rf4 Re7 31.Rb8 Kg7 32.Qe7 Kg6 33.Rg8 Kh6 34.Rh4) 28...Ke7 29.Qf3 (29.Rab1 Qb1 30.Rb1 Kf6 31.Qh8 Kg5 32.Qh7 f3 33.Qf7 f2 34.Kg2 f1B 35.Rf1 Re2 36.Kh3 Rf2 37.Rf2 Kh6 38.Kg4 a5 39.Rf6) 29...fg3 30.hg3 Kd6 31.Qd5 Ke7 32.Qc5 Ke8 (32...Kd8 33.Rab1 Qf2 34.Rf2 f6 35.Rb8 Kd7 36.Rb7 Kd8 37.Qc7 Ke8 38.Rb8) 33.Qa7 (33.Qc8 Ke7 34.Qc7 Ke8 35.Qf7 Kd8 36.Qe6 Qf2 37.Rf2 Kc7 38.Rf7 Kb8 39.Qe8) 33...f6 34.Qh7 Re2 35.Rae1 Re3 (35...Kd8 36.Qh8 Kc7 37.Qg7 Kc8 38.Qg4 Kb7 39.Re2 Qa3 40.Rb1 Kc7 41.Qg7 Kc6 42.Qb7 Kd6 43.Rb6 Kc5 44.Rc6) 36.Re3 de3 37.Qe4 1–0. Mansor,Tarek – Ebner,Martin, Baden–ch op U1600, 2009.

5.Nf3 c5 6.d4 ab5 7.dc5 (worse is 7.Bb5 Qa5 8.Nc3 Qb4=) 7...d5 8.cd6 (8.Ne5!? Qa5 9.Nc3+–) 8...Nd6+= 9.Nbd2 Nf6 10.Nb3 e5 (10...Nd7 11.Bd3+=) 11.Ne5 Nfe4? (11...Be6 12.Nf3+/–) 12.Qf3 (better is 12.Bb5 Ke7 13.Bd3+–) 12...b6?? (better is 12...Be6 13.a3 Ng5+/–) 13.Bb5+– Ke7 (13...Bd7 14.Bd7 Qd7 15.Nd7 Kd7 16.Rd1+–) 14.Nf7! Qc7 (14...Nf7 15.Qe4 Deflection (15.Qe4 Overloading)) 15.Nd6 (15.Be5 Bg4 16.Qf4 Rg8 17.Nd6 Nd6 18.Qg5 Kf7 19.Qg4 Rd8 20.Bd6 Qc3 21.Kf1 Rd6 22.Qc4 Qc4 23.Bc4 Kf6 24.Bg8 h5+–) 15...Nd6 16.Bd3 (better is 16.Qa8!? Nb5 17.Qe4 Be6 18.Qh4 Kd7 19.Rd1 Nd6 20.Qa4 Kc8+–) 16...Bb7 17.Qg3 Ke8 18.0–0 Rd8 19.Rfd1 Qd7 (19...Kf7 20.Be5 Qc6 21.Nd4+–) 20.Qe5 Be7 21.Qg7 Rf8 (21...Nf7 22.Nd4 Bf8 23.Qf6+–) 22.Bh7 Qc6 (22...Qe6 23.Nd4 Qd5 24.e4+–) 23.Nd4 Qc4 (23...Qd5 24.e4! Qc4 25.e5+–) 24.Ba3 Bf6 (24...Bd5 25.Bd3 Qc7+–) 25.Bg6 Rf7 26.Qf6 Ne4 27.Qe7 1–0. MrThayer (2230) – Rob L, ChessWorld.net, 2003.

4.Bb2 b6

5.e4 Nd6 6.e5 Ne4 +=.

5.Qf3 d5 6.c4 e6 7.Bd3 Bb7 8.Bf5 ef5+=.

5.Qf3 d5 6.c4 e6 7.cd5 Bb7 8.e4+/– Bb4?? (better is 8...Nh4 9.Qg3 ed5 10.Bg7 Bg7 11.Qg7 Ng6+=) 9.ef5+– Bd5 10.Qg4 (better is 10.Qg3 Ne7 11.fe6 Be6 12.Qg7+– (worse is 12.Bg7 Rg8 13.Qe5 Nd5+–)) 10...Qe7 (10...Bf8 11.Bg7 Nf6 12.Bf6 Qf6+–) 11.Qg7 ef5 12.Ne2 0–0–0 13.Qh8 (13.a3 Bd2 14.Nd2 Qd7+–) 13...f6 (13...Re8 14.Kd1 Bg2 15.Bg2 Qe2 16.Kc2 Qf2 17.Bc6+–) 14.Bd4 (14.a3 Bc5 15.Nbc3 Bb3+–) 14...Bc4 15.a3 Ba5 16.Kd1 (better is 16.Be3 Nh6 17.Qd8 Kd8+–) 16...Bb3 17.Ke1 Rd4 18.Nbc3 (18.h4 Rd8 19.Rh3 Bc4+–) 18...f4?? (18...Rd8 19.g3+=) 19.Rc1 (19.Rb1 Bc4 20.Kd1+–) 19...Rd8+= 20.Rb1 Bc4 (20...Bc4 21.f3 Nh6 22.Qd8 Kd8+=). mtrc – plabrado, internet, 2002.

5.Qf3 d5 6.c4 e6 7.cd5 ed5!? 8.Bd3 Nge7=.

5.Qf3 d5 6.c4 e6 7.cd5 Qd5?? 8.Bc4?? (better 8.e4 Nd4 9.ed5 Nf3 10.Nf3 (10.gf3?! ed5 11.Ne2 Ne7+–) 10...ed5 11.Bd3+–) 8...Qf3= 9.Nf3 Bb7 10.Be2 0–0–0 (10...c5 11.Nc3=) 11.0–0+= Bb4 (11...f6 12.Rc1+–) 12.d3 (12.Ne5 Ngh6 13.a3 Be7+–) 12...f6 13.a3 Bc5 (13...Ba5 14.d4+–) 14.Nbd2 (14.d4 Bd6+–) 14...Nge7 (14...e5 15.Rfd1+=) 15.Nb3 (15.d4 Bd6+–) 15...Bd6 (15...Bf3 16.gf3 Bd6 17.Rfc1+=) 16.e4 Nh6 17.Nbd4 (17.Rfc1 Ng6+=) 17...Kd7 18.Rfc1 e5 19.Nc6?? (better 19.Nb3+=) 19...Nc6–/+ 20.bc6 Bc6 21.Rc3 Bc5 22.Rac1 Ng4 (22...a6 23.Nd2 Bb5 24.Bd1–/+) 23.Kf1 (23.Nd2 h5 24.Bg4 hg4=) 23...Rc8 (23...Bb5 24.Nd2 Nh6 25.f4–/+) 24.h3 (24.Nd2 Nh2 25.Kg1+=) 24...Nh6–/+ 25.Bd1 Bb5 26.a4 Ba6 27.Bb3? (27.Ke2 Nf7–/+) 27...Bd6 (better 27...Bb4–+) 28.Bc4=+ Bc4 29.Rc4 (29.dc4 Bb4 30.Rd1 Ke6–/+) 29...c5 30.Ne1 (30.Rb1 Nf7–/+) 30...Nf7 31.Nc2 a6 32.Ne3 h5 33.Nd5 Rb8 34.g3 (34.R4c3 b5–/+) 34...Rhc8 (34...b5 35.ab5 ab5 36.R4c2–+) 35.f4 1–0. GuestPDDT – GuestZVSW, freechess.org, 2018.

5.Qf3 d5 6.Bc4 Nf6? (6...e6 7.Bd3=) 7.Bb3?? (better is 7.Bf6 dc4 8.Qa8 ef6 9.Nc3+–) 7...e6 (7...e5 8.Be5 Nh4 9.Qd1 Ng2 10.Kf1=) 8.d3 (8.c4 a6=) 8...Nh4 (8...a6 9.c4+=) 9.Qf4?? (better is 9.Qg3 Ng6 10.c4=) 9...Ng2–+ (9...Ng2 10.Kd1 Nf4 11.ef4 a6–+) 0–1. Trkn – Tim, itsyourturn.com, 2000.

5.Qf3 d5 6.Bd3 e6 +=.

5.Qf3 Nd6?? 6.Qa8+– Nf6 7.Qa7 Bb7 (7...e6 8.Qb8+–) 8.d3 Nd5 (8...Ba8 9.Qa4+–) 9.e4 Nb4 10.Na3 (10.Qa4 c5 11.c3 Nd3 12.Bd3 c4 13.Bc4 Ne4+–) 10...Qa8 (10...e5 11.Be5 Bc8 12.Kd1+–) 11.Qa8 Ba8 12.c3 (better 12.f3 f5 13.c3 Nd3 14.Bd3 fe4 15.Bc2+–) 12...Be4 (12...Nd3 13.Bd3 Ne4+–) 13.de4 Ne4 14.cb4 e6 15.Nf3 (better 15.Nc2 c6+–) 15...Bb4 16.Ke2 Bc5 17.Bd4 (better 17.Rc1 Ke7+–) 17...Ba3 18.Bg7 Rg8 19.Bh6 (19.Bd4!? f5+–) 19...Nc3 20.Kd3 (20.Kd2 Bb2 21.Re1 Na2+–) 20...Nb5 21.Rb1 Nd6 22.Rb3 (22.Be3 Nf5+–) 22...Bc5 23.Be3 Be3 24.fe3 (24.Ke3 Ke7+–) 24...Nf5 (24...f5 25.Kc2+–) 25.Ra3 Ke7 (25...Nh6 26.Ra7 Kd8 27.g3+–) 26.Rc3 (26.Ra7 Rc8+–) 26...c6 (26...c5 27.e4 Nd6 28.e5+–) 27.Nd4 (27.e4 Nd6+–) 27...c5 (27...Nd6 28.Nb3+–) 28.Nf5 ef5 29.g3 Ra8 (29...d5 30.Bg2 Kd6 31.Kc2+–) 30.a3 b5 (30...d5 31.Bg2 Rd8 32.Ke2+–) 31.Bh3 (31.Bg2 Ra5+–) 31...b4 (31...f4 32.gf4 d6 33.Rb1+–) 32.ab4 cb4 33.Rb3 Ra3 (33...Ra5 34.Rb4 h6 35.Rhb1+–) 34.Ra3 ba3 35.Ra1 1–0. GuestVHYP – GuestTVNJ, freechess.org, 2018.

5.Qf3 Ne3?? 6.de3+– Rb8 7.c4 Bb7 8.Qd1 d6 9.Nf3 e5. algernon (2345) – capacuba (2210), net–chess.com, 2008.

4.Bb2 c6

5.a4 cb5 6.ab5 b6 7.Bd3+– Nd6 8.Nf3 Bb7 9.0–0 a6? (better 9...f5+–) 10.ba6 Ba6 (10...Bc6+–) 11.Ba6 b5 (11...e6 12.Nc3+–) 12.Ne5 (better 12.Nc3 Nc4 13.Bb5 Ra1 14.Qa1 Nd6+–) 12...Qb6 (12...Nf6 13.Qf3+–) 13.Bd4 Qc7 (13...Qa6 14.Ra6 Ra6 15.Nc3+–) 14.Bb5! Ra1 (14...Nb5 15.Ra8 Mate attack) 15.Bd7 Kd8 16.Ba1 f6 (16...Nf6 17.Ba4 e6 18.Nc3+–) 17.Qf3 Qa7 (17...Qb7 18.Bc6 Qa6+–) 18.Nc6 (18.Nc6 Kd7 19.Na7+–) 1–0. DEFFM – GuestTTJZ, freechess.org, 2019.

5.a4 Nf6 6.Nf3 e6 7.Bc4 Bc5 8.d3 (8.d4 Bb4 9.c3 Be7+=) 8...a6 9.bc6 dc6 (9...bc6 10.d4 Rb8 11.Ra2 Qa5 12.Nbd2=) 10.Nbd2 b5? (better 10...0–0!?=) 11.ab5+– cb5 12.Bb3 (better 12.Bb5 Kf8 13.Bc6+–) 12...0–0= 13.Ne5 Bb7 14.e4 Nd4 15.Ba2 Qc7 16.Nef3 Rfd8 17.Rc1 Qf4 18.0–0? (better 18.Bd4 Bd4 19.Nd4 Rd4 20.Qf3=+) 18...e5?? (better 18...Nf3!? 19.Nf3 Be4–+) 19.Ra1 (better 19.g3 Qh6 20.Ne5+=) 19...g5?? (better 19...Nf3 20.Nf3 Ne4–/+) 20.Bc1 (20.g3 Qg4 21.Ne5 Qd1 22.Rad1 Ne6+–) 20...Qg4 (20...Ng4 21.c3 Nc6 22.Nb3 Bf2 23.Rf2 Nf2 24.Kf2 Qe4 25.Nc5+– (25.de4?! Rd1 26.Nc5 Ra7+–)) 21.Ne5 Qe6?? (better 21...Qd1 22.Rd1 Nc2 23.Nf7 Rf8+–) 22.Be6+– Ne6 23.Bb2 Ne4 (23...Bb4 24.Nc6! Bc6 25.Bf6+–) 24.Qh5 (better 24.de4 Be4 25.Re1+–) 24...Nd2 (24...Nd6 25.Ng4 Kf8+–) 25.Qf7 Kh8 26.Ng6 1–0. alessandrocarvalhaes (1790) – Stoindlscheyba (1850), lichess.org, 2019.

5.c4 cb5 6.cb5 a6 7.Nc3 Nd6 8.Nf3 ab5 9.Nb5 Nb5 (9...Nb5 10.Bb5 Nf6+=). xadrezpg (2395) – tacitus (1980), net–chess.com, 2010.

5.c4 cb5 6.cb5 b6 7.a4 Bb7 8.Nf3 Bf3 9.Qf3 Nh4 10.Qg3 Nf5 11.Qf4 e6 12.Bd3 Bd6 13.Qf3 Nh4 14.Qe4 (better is 14.Qg4 Bf8 15.0–0+/–) 14...Nf5?? (14...f5!? 15.Qd4 Bf8+= (15...Ng2? 16.Kf1 Qf6 17.Kg2+–)) 15.Qg4?? (15.g4 Nh4 16.Bg7+–) 15...Nf6 16.Qf3 Nh4 17.Qh3 Nf5? (17...Ng6!?+=) 18.Bf5 (better is 18.e4 Nh6 19.e5+–) 18...ef5+/– 19.Qf5 0–0 (19...Rc8 20.Bf6 Qf6 21.Qf6 gf6 22.Nc3+–) 20.Nc3 (20.Bf6!? Qf6 21.Qf6 gf6+–) 20...Be7 21.Nd5 g6?? (better is 21...Nd5 22.Qd5 Rc8+/–) 22.Nf6 Bf6 23.Qf6 (23.Bf6?! gf5 24.Bd8 Rfd8+–) 23...Qf6 24.Bf6 d5 25.d4 Rac8 26.0–0 Rc2 27.g4 h5 28.g5 Kh7 (28...h4 29.Kg2+–) 29.h4 (29.Rfc1 Rcc8+–) 29...Re8 (29...Rfc8 30.f3+–) 30.Rac1 Rd2 (30...Rec8 31.Rc2 Rc2 32.Re1+–) 31.Rfd1 (31.Rc7!? a6+–) 31...Re2 (31...Rd1 32.Rd1 Rc8 33.f3+–) 32.Rc7 Re4 (32...Kg8 33.Rdc1 Kf8+–) 33.Rf7 (33.Rc8 Rg4 34.Kf1 Rf2 35.Kf2 Rg2 36.Kg2 a6 37.Rh8) 33...Kg8+– 34.Rg7 Kf8 35.Rg6 Rg4 (35...Rh4 36.Rc1 Re4 37.Rg7+–) 36.Kf1 Rc2 37.Rh6 Rh4 (37...Kf7 38.Rh5 Ke6 39.Rh6+–) 38.Rh8 (better is 38.g6 Rh1 39.Kg2 Rh2 40.Kg1+–) 38...Kf7 39.Rh7 Kg6 40.Ra7 (better is 40.Rg7 Kf5 41.Kg2 Rg4 42.Kf3+–) 40...Rh1 41.Kg2 Rd1 42.Rg7 Kf5 43.Be5 (43.Bd8 Ra1 44.Rf7 Kg6 45.Rf6 Kg7+–) 43...Rdd2 (43...Ra1 44.Rd7 Ra4 45.Kf3+–) 44.Rf7 (better is 44.Kg3 Ke4 45.Rf7+–) 44...Ke4?? (better is 44...Kg5 45.a5 Rb2 46.ab6 Rb5+–) 45.Rf4 Kd3 46.g6 Rc8 47.g7 Rg8 48.Kf3 (48.Rf8 Rg7 49.Bg7 Ra2+–) 48...h4 (48...Ra2 49.Rf8 Rg7 50.Bg7 Ra4 51.Rb8+–) 49.Bf6 (better is 49.Rh4 Ra2 50.Rh8 Rg7 51.Bg7 Ra4+–) 49...h3 50.Rh4 Rf2 (51.Kf2 Kc3 52.Rh3 Kb4+–; 50...Rc2 51.Be5 Rc4+–) 0–1. OPA – kilmer49, Live Game Caissa's Web, 2004.

5.d4 d5 6.Nf3 Nf6 7.Bd3 e6 8.bc6 bc6 9.0–0 Bd6 10.Ne5 0–0 11.Nc6?? (11.Nd2 h5+=) 11...Qc7 (better 11...Qb6–+) 12.Ne5= Rb8 13.Qc1 Ne7 (13...Be5 14.de5 Ng4 15.Nc3 Qe5 16.g3=) 14.a4 (better 14.Nc3 Be5 15.de5 Qe5 16.Nb5+–) 14...a5? (14...Ne4 15.f3 Ng5 16.f4+=) 15.Ba3 (better 15.Na3 Bd7 16.Nb5 Bb5 17.ab5+– (17.Bb5?! Rfc8+=)) 15...Be5= 16.de5 Ng4?? (better 16...Qe5 17.Nd2 Qc7+=) 17.Bd6+– Qb7 18.Bb8 (better 18.f3 Nh6 19.Qa3+–) 18...Qb8 19.f4 Qb6 20.Rf3 d4 21.e4 Bb7 22.Nd2 Rb8 (22...Rc8 23.Qa3 Nc6 24.Nc4+–) 23.Rb1 Qc6 (23...Qa7 24.Nc4+–) 24.Nc4 Ra8 (24...Qc7 25.Qa3 Rd8 26.Na5+–) 25.h3 Nh6 (25...Ne3 26.Ne3 de3 27.Qe3+–) 26.Qb2 Bc8 (26...Ba6 27.Nd6 Bd3 28.cd3+–) 27.Nd6 (27.Qd4 Bd7+–) 27...Bd7 (27...Qc5 28.Qb5 Qb5 29.ab5+–) 28.Qd4 (better 28.g4 Kf8 29.Bb5+–) 28...Be8 (28...Qa4 29.Qf2+–) 29.Ne8 (better 29.Rb7 Qa4 30.Qa4 Ba4 31.Re7 Kf8+–) 29...Qe8 (29...Re8 30.Rb5 Qc7 31.Qd6 Qa7 32.Qc5 Qc5 33.Rc5+–) 30.Bb5 Qc8 31.c4 Qc7 32.c5 (32.Qd6 Qa7 33.c5 g6+–) 32...Rc8 (32...Rd8 33.Qc3 Ng6 34.c6+–) 33.Rd3 f6 (33...Ng6 34.Qf2 Rb8+–) 34.Bd7 fe5 (34...Rf8 35.Be6 Kh8 36.Qd6 Qd6 37.ed6+–) 35.Qe5 Qe5 36.fe5 Rf8 37.Be6 Kh8 38.Rb7 Nc6 39.Rdd7 1–0. Darkseid (1755) – McAffinity (1650), ChessWorld.net, 2005.

5.Qg4 d5 6.a4?? (better is 6.Qa4+=) 6...Ne3!–+ 7.Qg3 (7.de3 Bg4 Discovered attack; 7.fe3 Bg4 Discovered attack) 7...Nc2 8.Kd1 Na1 9.Ba1 Nf6 10.Bf6 ef6 11.Qe3 (11.Bd3 g6–+) 11...Be7 12.Bd3 0–0 13.Nf3 Be6 (13...c5!? 14.Bc2–+) 14.Nd4 Qd7 15.Ke2 (15.Nc3 Bd6–+) 15...Bc5 16.Rc1 (16.Qf4 Rfe8 17.Ne6 Bd6–+) 16...Rfe8 17.Rc5 (17.bc6 Bg4 18.Kf1 Re3 19.Bh7 Kh7 20.cd7 Rd3 21.Rc5 Rd4–+) 17...Bg4 18.f3 (18.Kf1 Re3 19.fe3 Qd6–+) 18...Re3 (18...Qd6!? 19.Rc1 Re3 20.de3–+) 19.de3 Be6 (better is 19...Qd6 20.Nb3 Bd7 21.bc6 Bc6 22.g3–+) 20.Nc3 (20.bc6 bc6 21.Rc6–+) 20...Re8 (better is 20...Qe7 21.Rc6 bc6 22.bc6–+) 21.bc6 bc6 (better is 21...Qd6 22.Ra5 bc6 23.Kd2–+) 22.Rc6 Rc8 23.Rc8 Qc8 24.Kd2 Qb7 25.Kc2 Bd7 26.Ndb5 (26.Kd2 g6–+) 26...a6 (better is 26...Bb5 27.Bb5 Qb6 28.Kd3–+) 27.Nd6 (27.Nd4–+) 27...Qc7 28.Nf7 (28.Nf5 Qh2 29.Ne7 Kf8 30.Ned5 Qg2 31.Be2 Ba4 32.Kd3 Bc6–+) 28...Ba4 29.Kd2 Kf7 (better is 29...Bc6 30.Ba6 Kf7 31.g3–+) 30.Nd5 (30.Na4 Qh2 31.Be2 Qg2 32.Nc3–+) 30...Qh2 31.Bc4 Qg2 32.Kd3 Qc2 33.Kd4 Qd2 34.Ke4 Bc2 35.Kf4 (35.Bd3 Qd3 36.Kf4 Qg6 37.Nf6 Kf6 38.e4 Qg5) 35...g5 (35...Qh2 36.Kg4 h5) 36.Kg4 Qg2 37.Kh5 Bg6 (37...Qh3) 38.Kh6 Qh3 0–1. Willi_weizenkeim – Miguelito, playchess.de, 2005.

4.Bb2 d5

5.a4 e6 6.Nf3 Nf6 7.Bd3 Nd6 (7...Bc5!?=) 8.0–0 Be7 9.Qe2 0–0 10.Rc1 c5 11.c4 dc4 12.Bc4 Nc4 13.Rc4 b6 14.Nc3 Bb7 15.e4 Qc7 16.d4 Rad8 17.a5 Rd7 (worse is 17...ba5 18.Ba3+/–) 18.ab6 ab6 (18...Qb6? 19.dc5 Bc5 20.Na4 Bf2 21.Qf2 Qf2 22.Kf2 Ne4 23.Ke1+–) 19.dc5 Bc5 20.Na4 Ra8 21.Rac1 Qd8 22.Nc5 bc5 23.Bf6 Qf6 24.Rc5 h6 25.Ne5 Rd4 26.Nc6 Rda4 27.g3 Ra1?? (better is 27...Ra2 28.R5c2 Qg5+–) 28.e5+– R8a2 29.Qa2 (29.Qa2 Ra2 30.ef6+–; 29.ef6?! Rc1 (29...Re2?? 30.Ra1 Rb2 31.Kf1+–) 30.Rc1 Re2+=) 1–0. marekt (2115) – donex7 (1790), gameknot.com, 2014.

5.c4 dc4 6.Bc4 Nd6 7.Be2 Bd7 8.Nc3 c6 9.a4 e5 10.Nf3 f6 11.Qc2 Rc8 12.d4 e4 13.Ne4 cb5 14.Nd6 Bd6 15.Qe4 Ne7 16.ab5 Bb4 17.Nd2?? (better is 17.Kf1 Qb6 18.Qd3+/–) 17...Bd2–/+ 18.Kd2 Bf5 19.Qb7 Rc7 20.Qf3 Rc2 21.Ke1 Rb2 22.Ra7? (22.Kf1!?–/+) 22...Qd6 23.Ra8 Bc8 (23...Kf7 24.Ra1 Qb4 25.Kf1 Rb1 26.Rb1 Qb1 (26...Bb1?! 27.g4–/+) 27.Bd1 Be4 (27...Qb5?! 28.Kg1–+) 28.Qh5 g6–+) 24.Qh5–/+ g6 25.Qh6?? (better is 25.Qc5 Rb1 26.Bd1 Qc5 27.dc5–+) 25...Qb4 (25...Qb4 26.Kf1 Rb1 27.Bd1 Qc4 28.Ke1 Qc2 29.Qg6 hg6 30.Rc8 Nc8 31.b6 Qd1) 0–1. byron_de – PassedPawn, ChessWorld.net, 2003.

5.c4 dc4 6.Bc4 e6 7.a4 Bc5?? (7...Nh4 8.g3 Nf5 9.Nf3=) 8.Nf3 (better 8.g4 Nd4 9.ed4 (9.Bd4?! Bd4 10.Nc3 Bc5=) 9...Bd4 10.Bc3+–) 8...Nf6+= 9.0–0 0–0 10.d4 Bb6? (10...Bd6 11.Nc3 Be7 12.e4+–) 11.Nc3?? (better 11.a5 Nd6 12.Bd3 (worse 12.ab6 Nc4 13.ba7 Nd6+–) 12...Ba5 13.Ra5+–) 11...a5 12.Bd3 c6 13.Qc2 Ne7 14.Ne5 Bc7 15.Rad1 Ng6 (15...Bd7 16.Ne4 Ne4 17.Be4 cb5 18.Bh7 Kh8 19.Be4+–) 16.f4 (16.bc6 bc6 17.Bg6 fg6+–) 16...Re8 (16...Bd7 17.Ba3 Re8 18.Nd7 Qd7 19.Ne4+–) 17.bc6+– bc6 18.Nc6 (18.Ng6?! hg6 19.Ne4 Nd5+–) 18...Qd6 (18...Qd7 19.Bb5 Qd6 20.e4+–) 19.Nb5 Qd5?? (19...Qd7 20.Ne5 Be5 21.de5 Nd5 22.Bg6 fg6+–) 20.Nc7 Qh5 (20...Qd6 21.Na8 Bb7 22.Na5 Ba8 23.Nc4+–) 21.Na8 (better 21.Be2 Qf5 22.Qf5 ef5 23.Na8 Nd5+–) 21...Ng4 Do you see the mate threat? 22.h3 Bb7 (22...Ne3 23.Qc5 Qc5 24.dc5+–) 23.Bg6 (better 23.hg4!? Qg4 24.Nc7 Rc8 25.Bg6 Rc7 26.Bh7 Kh8+–) 23...hg6 (23...Qg6 24.Qg6 (24.hg4 Qc2 25.Rc1 Qb2–+) 24...hg6 25.hg4 Bc6 26.Nc7+–) 24.hg4 Qg4 25.Nb6 (25.Nc7!? Rf8 26.Ne7 Kh7+–) 25...g5 26.Rf3 (26.Na5!? Ba6 27.Nac4 Bc4 28.Nc4 Rc8+–) 26...gf4 27.Rf4 Qg3 28.Rdf1 Rf8 29.R4f3 (29.Ne7 Kh8 30.d5 Qe3 31.Qf2 Qf2 32.Kf2 Bd5 33.Rh4) 29...Qg4 30.Ne7 Kh8 31.Rh3 Qh3 32.gh3 g6 33.Ng6! Kg7 (33...fg6 34.d5 Discovered attack) 34.Nf8 Kf8 (34...f5 35.Ne6 Kh6 36.Qc7 Be4 37.Qg7 Kh5 38.Qg5) 35.Qc7 (35.Qg6 Bf3 36.Ba3 Ke8 37.Qg8) 35...Kg7 (35...f6 36.Rf6 Kg8 37.Qf7 Kh8 38.Rh6) 36.Qf7 Kh6 37.Qb7 (37.Rf6 Kg5 38.Qg6 Kh4 39.Qg4) 37...e5 (37...Kg6 38.Qg2 Kh6 39.Rf6 Kh7 40.Qg6 Kh8 41.Rf8) 38.Rf6 Kg5 39.Qg7 Kh4 (39...Kh5 40.Qg4) 40.Rh6 (40.Qg4) 1–0. BeepBeepImAJeep (2550) – BOKHODOM (1990), lichess.org, 2017.

5.c4 e6 6.cd5 ed5 7.Nf3 Nf6 8.Bd3 Nd6 9.Nd4 Bg4 10.f3 Bd7 11.0–0 a6 12.ba6 ba6 White gets strong play along the open b–file 13.Ba3 Nb7 14.Bf8 Kf8 15.Qb3 Qb8 16.Nc3 c5 17.Nf5 Na5 18.Qb8 (18.Qa3 Qb4 19.Qc1 Nc6+=) 18...Rb8= 19.Rab1 Rb1 (19...Ra8 20.g4=) 20.Rb1+= (worse is 20.Bb1 Nc4 21.Rd1 g6+=; worse is 20.Nb1 c4 21.Bc2 Bf5 22.Bf5 Ke7+=) 20...Nc6 21.Rb6 g6 22.Ng3 Ke7 (22...c4 23.Bc2 Ke7 24.Ba4+= (worse is 24.Ra6 Nb4 25.Rf6 Kf6–/+)) 23.Ba6+/– (worse is 23.Ra6 Nb4 24.Rf6 Kf6–/+) 23...Rb8 24.Rb8 Nb8 25.Be2 h5 26.h4 Nc6 27.Bb5 (27.Bb5 Nb4 28.a3+/–) 1–0. Sternik,Ryszard – Deneuville,Christian, corr SOK–123, 1999.

5.c4 e6 6.Nf3 Nf6 7.Be2 Bb4 8.a3 (8.cd5 Qd5 (8...Nd5? 9.e4+–) 9.Bf6 gf6+=) 8...Ba5 (8...Bd6 9.Qc2=) 9.0–0 (9.cd5 0–0 (9...Nd5? 10.e4+–) 10.de6 Be6+–) 9...0–0 10.cd5 ed5 (10...Nd5? 11.e4+–; 10...Qd5? 11.Bf6 gf6 12.Qa4+–) 11.d3 Re8 12.Ne5 Qd6 13.d4 c6 (13...Nd7!?=) 14.bc6 bc6 15.Qa4 Bb6 (15...Bc7 16.Qc6 Qc6 17.Nc6+–) 16.Qc6 (16.Nc6? Bd7–+) 16...Qc6 17.Nc6 Bb7 18.Bb5 (18.Ne5 Rac8 19.Rd1 Rc2+–) 18...a6 19.Ba4 Rf8 (19...Rac8 20.Ne5 Re7 21.Nd2+–) 20.Nc3 Rac8 21.Ne5 Nd4 (21...Rc7 22.Rfc1+–) 22.ed4+– Bd4 23.Nd7?? (better 23.Nd1 Bb2 24.Nb2+–) 23...Nd7= 24.Bd7 Rc7 (worse 24...Bc3 25.Bc8 Rc8 26.Bc3 Rc3 27.Rfc1+–; worse 24...Rc3 25.Bc3 Bc3 26.Rab1+=) 25.Nd5 Rd7 26.Bd4 Rd5 27.Be3 Rfd8 28.a4 R5d6 29.a5 Rg6 30.Bb6?? (better 30.f3=) 30…Rg2 (30...Rg2 31.Kh1 Rf2 32.Kg1 Rg2 33.Kh1 Rg3 34.Rf3 Bf3) 0–1. GuestMMBV – GuestPMYW, freechess.org, 2017.

5.Bd3 Nd6 6.Nf3 Bg4 7.0–0 e5 (better is 7...e6!?=) 8.Be5+/– f6 9.Bc3 Ne4 10.Bb2 Bd6 11.h3 Bh5 12.Be2 Qd7 13.Nc3 Ne7 14.Nd4 Bg6 15.d3 Nc3 16.Bc3 Be5 17.f4 (17.Rb1!?+/–) 17...Bd4+= 18.Bd4 Qb5 19.c4 Qd7 20.cd5 Nd5 21.Qb3 b6 22.Bf3 Bf7 23.Qa3 (23.Bg4!? Qd6 24.Qa4 Kf8 25.Rae1=) 23...c5+= 24.Bb2 Rd8 (24...0–0 25.Bd5 Qd5 26.e4+=) 25.d4= 0–0 (25...Qe7!?=) 26.dc5+/– bc5 27.Qc5 Rfe8 28.Bd4 a6 29.Be2 Nf4?? (better is 29...Qe6+/–) 30.Rf4+– Rc8 31.Qa7 (31.Qa5!? Rc6+–) 31...Qa7 32.Ba7 Ra8 33.Bd4 a5 34.Bf3 Rab8 (34...Ra6 35.a4+–) 35.Rg4 (better is 35.Rf5!? a4+–) 35...Bh5 36.Rg3 Bg6 37.h4 Re7 (37...Kf8 38.h5 Bf7 39.h6+–) 38.h5 Bd3 (38...Be4 39.Bf6 Rf7 40.Be4 Rf6 41.Rc1+–) 39.Bf6 Re3 (39...Rd7+–) 40.Bd5 (40.Bd5 Kf8 41.Bg7 Ke7 42.Re3 Kd7 43.Rd3+–) 1–0. mikebaldini (1650) – extrmn8r (1695), gameknot.com, 2014.

5.Bd3 e5 6.Be5+= Nf6 7.Qf3?? (7.Nf3 Bd6+/–) 7...Nd6?? (better is 7...Nh4 8.Qe2 Ng2 9.Kd1 Bd6+=) 8.Bf6+/– Qf6 9.Qf6 gf6 10.Nf3 h5 11.Nc3 Be6 12.Nh4 (12.a4 Bg7+/–) 12...0–0–0 13.a4 Nc4 (13...f5 14.a5+/–) 14.a5 Ne5 15.Bf5 d4 16.Ne4 de3 17.de3 (17.fe3!? Bh6+–) 17...Rd5 18.Be6 (18.Nf6?! Rb5 19.Ne4 Rb4+=) 18...fe6 19.Nf6 (better is 19.b6!? a6 20.bc7+=) 19...Rb5+= 20.g3 (20.f4 Nc4 21.Ne4 Bg7–/+ (21...Ra5?! 22.Ke2=)) 20...Bb4 (better is 20...Bg7 21.Ne4 Nf3 22.Ke2 Nh4 23.gh4 Ba1 24.Ra1 Rd8–/+) 21.Ke2= Rd8 22.Rad1 Rd1 23.Rd1 (23.Kd1? Be7 24.Ng8 Bh4–+) 23...Ra5 24.Nf3?? (better is 24.Rb1 Nc6 25.Ng6=) 24...Nf3–+ 25.Kf3 Rf5 26.Kg2 Rf6 27.Rd4 Bd6 28.Rh4 Rf5 29.Re4 Kd7 30.Rd4 Ke7 31.e4 Rc5 32.Rd2 a5 33.f4 e5 34.f5 Kf6 (34...a4 35.Kh3–+) 35.h4 (35.Kh3 Rc4 36.Re2 a4–+) 35...b5 36.Kh3 (36.g4 hg4 37.h5 Kg5–+) 36...a4 37.g4 Rc3 38.Kg2 hg4 39.Rd5 (39.h5 Re3–+) 39...a3 40.Rb5 (40.Rd2–+) 40...a2 41.Ra5 Ba3 42.Ra6 c6 43.h5 (43.Kg1 a1Q 44.Kg2 Rc2 45.Kg3 Qg1) 43...a1Q 44.Ra8 (44.Rc6 Rc6 45.h6 Rc2 46.Kg3 Qg1 47.Kh4 Rh2) 44...Qe1 45.Rf8 Bf8 0–1. mikebaldini (1690) – jaime60 (1720), gameknot.com, 2014.

5.Bd3 Ngh6!? =.

5.Nf3 b6 6.c4 a5 7.cd5 Qd5 8.Nc3 Qd6 9.d4 Qb4 10.Qc2 Bb7 11.Ne5 Nfh6?? (11...e6 12.a3 Qd6 13.Rc1+/–) 12.a4 (12.Nc4 Bd5 13.a3 Qc4 14.Bc4 Bc4 15.Qe4+–) 12...Qd6+/– 13.Ba3 Qe6 (13...Qd8 14.Rd1+/–) 14.Bc4+– Qf6? (14...Qc8 15.0–0+–) 15.Ne4 (better is 15.Bd5!? 0–0–0 16.Bb7 Kb7 17.Qe4 c6 18.Nc6 Kc8+–) 15...Qh4 16.Bd3 (better is 16.Be6 fe6 17.Qc7+–) 16...f6? (16...Rc8 17.0–0+–) 17.Nc6 (better is 17.Qc7 fe5 18.Qb7+–) 17...f5 18.Ng3 g6 19.Ne5 (19.e4 fe4 20.Ne4 Ng4+–) 19...Rc8 (19...Bg2? 20.f3 c5 21.Qg2+–) 20.Nf3 (20.Nc6 Ng4+–) 20...Qf6 21.Bb2 Bg7 22.0–0 (22.Rc1!?+/–) 22...Bf3+= 23.gf3 e6 24.Qc6 Kd8 (better is 24...Kf7+/–) 25.d5?? (better is 25.Bc4 Ne7 26.Qe6+/–) 25...Qb2–+ 26.de6 Nf6 27.Rad1 (27.f4 Ke7–+) 27...Ke7 28.Bc4 Qe5 29.Rd7 (better is 29.Ne2–+) 29...Nd7 30.Qd7 Kf6 31.e7 (31.f4 Qc3 32.e4+/–) 31...Qe7 32.Qc6 (32.Qd4 Qe5 33.Qd7 Rhd8 34.Qc6 Qd6–+) 32...Qd6 (32...Qd6 33.Qb7 Rhd8–+) 0–1. Wall,Bill – Smith,Steven, San Antonio, TX USA, 1994.

5.Nf3 Nd6 6.Be2 Bd7 7.Nc3 a6 (better is 7...Nf6!?+=) 8.ba6+/– Ra6? (better is 8...Nf6 9.ab7 Rb8+/–) 9.Ba6+– (9.Ba6 ba6 10.Nd5+–) 1–0. pierre – taqnu, internet, 2010.

5.Nf3 Nd6 6.Be2 Nf6 7.0–0 c6 8.bc6 bc6 9.c4 dc4 10.Qa4 Bd7 11.Na3 e6 (11...c5 12.Qd1=) 12.Nc4 Nc4 13.Qc4 Rb8 14.Be5 Rb4 15.Qa6 Bc5 (15...Qb6!?+=) 16.Rab1 0–0 (16...Rb6 17.Qa4+/– (17.Qa7?! Rb1 18.Qc5 Qb6 19.Qb6 Rb6+=)) 17.Rb4 Bb4 18.Qa7 c5? (better is 18...Qa8!? 19.Qa8 Ra8+/–) 19.Bf6+– gf6 20.a3 Ba5 21.Qc5 Qa8 22.Qd4 Qd8 23.Qg4 Kh8 24.Qh5 Qc7 25.Bd3 f5 26.Ng5 Kg7 27.Qh7 Kf6 28.Qh6 Ke7 29.Nh7 Rd8 30.Qg5 Kd6 31.Qf6 Bc6 32.Bf5 (32.Bf5 Rg8 33.e4+–; 32.Rc1 Rd7 33.Nf8 Bd2+–) 1–0. Sternik,Ryszard – Stobbe,Arthur J, corr Matteus Chess op, 1999.

5.Nf3 Nf6 6.c4 dc4 7.Bc4 Nd6 8.Be2 g6 9.0–0 Bg7 10.Nc3 0–0 11.a4 Nfe4 12.Rc1 c5 13.d3 Nf6 14.Qc2 Re8 15.Rfd1 e5 16.Nb1 e4 17.de4+/– Nfe4 18.Bg7 Kg7 19.Nc3 Qa5 20.Ne4 Ne4 21.Bd3 Nf6 22.Qc5 Qa4 23.Ra1 Qb3 24.Bc4 Qb2 25.Rdc1?? Qf2+= 26.Kf2 Ne4 27.Ke2 Nc5 28.Bf7 Kf7 29.Rc5 Bg4 30.Kf2 Bf3 31.gf3 a5= 32.b6 Ra6 33.Raa5 Rb6 34.Rab5 Rb5 35.Rb5 Re7 36.e4 Rc7 37.Kg3 Ke7 38.Kf4 Kd6 39.h4 Rf7 40.Ke3 Kc6 41.Rd5 b5 42.f4 b4 43.Rd8 Rb7 44.Rd2 b3 45.Rb2 Kc5 46.Kd3 Kb4 47.Kd2 Rf7 48.e5? Rf5?? 49.Ke3=+ Rf8 50.Ke4 Ka3 51.Rg2 b2–/+ 52.Rg3 Ka2 53.Rg2 Ka1 54.Rg1 b1Q 55.Rb1 Kb1 56.e6 h6 57.Ke5 g5?? (58.hg5 hg5 59.fg5 Rg8=+; better is 57...Rf5 58.Ke4 Rf6–+) 0–1. Valles,L – Buenafe,J, Alfafar–Burjasot, 1991.

5.Nf3 Nf6 6.c4 e6 7.d4 Bb4 8.Nc3 Ne4 9.Rc1 c6 (9...Nh4 10.Ne5=) 10.a4 Qa5 11.Qb3 cb5 12.cb5 (12.cd5? ba4 13.Qc2 a3–/+) 12...Bd7 13.Bd3 Bc3 (13...0–0 14.Ne5 Be8 15.Be4 de4 16.Nc4 Bc3 17.Bc3+/–) 14.Bc3+/– Nc3 15.Rc3 (15.Qc3!? Qc3 16.Rc3+/–) 15...Rc8= 16.Kd2 Nd6 17.Rhc1 Ne4 (17...0–0 18.Ke2+=) 18.Be4+/– de4 19.Ne5 f5? (19...Qd8 20.Rc8 Bc8 21.Qa3+/–) 20.Nd7?? (better is 20.Nc4 Rc4 21.Qc4+–) 20...Kd7+= 21.Ke2 Rc3 22.Rc3 Qb6 23.Qc4 Qd6 24.h3 Rf8 Black prepares f4 25.a5 f4 26.Qc5 fe3 (26...Qc5 27.Rc5 f3 28.gf3 ef3 29.Kd3+/–) 27.Qd6 (27.fe3 Qc5 28.Rc5 Kd6+/–) 27...Kd6 28.Ke3 (worse is 28.Re3 Rf5 29.Rb3 Rd5=) 28...Rf5 29.Rb3 (worse is 29.Ke4 Rb5 30.Rf3 Ra5=) 29...b6 30.ab6 ab6 31.Ke4 Rf2 32.g4 (32.Rc3 Re2 33.Kf3 Rb2 34.Rc6 Kd5 35.Rb6 h6=) 32...g5 33.Rc3 Rf4 34.Ke3 Kd5 35.Rc6 Re4 36.Kf3 Rd4 37.Rb6 Rd3 38.Kg2 ½–½. Trkn – Bangman, itsyourturn.com, 2000.

5.Nf3 Nf6 6.Bd3 Nd6 7.a4 Bg4 8.h3 Bh5 9.Bf6 gf6 10.Nc3 e6 11.a5 c5 12.bc6 bc6 13.e4 Bg7 14.Qe2 de4 15.Be4 Qc7 16.Bd3 f5 17.Qe3 Rg8 18.Nd4 Qd7 19.Nb3 (19.Rb1 Nc4 20.Bc4 Bd4=+) 19...Bc3 20.dc3 Rg2 21.Qh6 Bg6?? (better is 21...Bf3=+) 22.Bf1+– Rf2 23.Kf2 Ne4 24.Ke1 Qd6 25.Qe3 e5?? (better is 25...f4 26.Qd4 Rd8=) 26.Bg2+– Qc7 27.Be4 fe4 28.h4 f5 29.h5 Bf7 (29...f4 30.Qg1 Bf7 31.Qg7+–) 30.Qh6 0–0–0 31.Qh7 Qd7 32.Rh2 f4 (32...Bd5 33.Qd7 Rd7 34.Nc5+–) 33.Qe4 Bd5 34.Qd3 (34.Qe5 Re8 35.Qe8 Qe8 36.Re2 Qh5–+) 34...Rg8 35.h6 e4 36.Qa6 Kd8 37.h7 Rh8 38.Rd1 Rh7 39.Nc5 (39...Rh2 40.Nd7 Rh1 41.Kd2 e3 42.Kc1 Rd1 43.Kd1 Kd7 44.Qa7 Ke6 45.Qd4+–) 1–0. marekt – PassedPawn, ChessWorld.net, 2003.

5.Nf3 Ngh6 6.Be2 (6.Bd3 e6+–) 6...Ng4 (6...e6 7.c4+=) 7.h3 Nf2?? (better 7...Nf6+=) 8.Kf2+– Qd6 9.Be5 Qg6 (9...Qd7 10.c4 f6 11.Bh2+–) 10.Bd3 (better 10.Bc7!? e6+–) 10...f6 11.Bh2 (11.Bc7 e5 12.g4 e4 13.gf5 Bf5+–) 11...e5 12.Nh4! e4?? (12...Nh4 13.Bg6 Pinning (13.Bg6 Deflection)) 13.Ng6 hg6 14.Be2 Nh4 (14...Bd6 15.Bd6 Nd6 16.Qc1+–) 15.c4 dc4 16.Qc2 Ng2 17.Qe4 Be7 18.Qg6 Kd7 19.Bg4 Kd8 20.Qg7 Re8 21.Kg2 Bf8 22.Bc7 (22.Qc7) 1–0. GuestKPLB – GuestMWCG, freechess.org, 2020.

5.h4 Nf6 6.g4 Nd6 7.g5 Nfe4 8.d3 Nc5 9.a4 e5 (9...c6!?=+) 10.Be5+= Bf5 (10...h6 11.Qh5+=) 11.Nf3 Kd7 (11...Nd7 12.Bf4+–) 12.Nbd2 (12.Nc3 Be6+–) 12...Be7 (better 12...f6!? 13.gf6 gf6 14.Bd6 Bd6+–) 13.Nd4+– Be6 14.N2f3 (better 14.Bg7 Rg8 15.Ne6 Ne6 16.Bb2+–) 14...c6? (better 14...Ne8+–) 15.Bg7+– Kc7 (15...Qa5 16.Ke2 Rhg8 17.bc6 Ke8 18.Be5+–) 16.Ne5 (better 16.Bh8 Qh8 17.Bh3+–) 16...Rg8 17.Bh6 f6 18.gf6 (18.bc6?! fe5 19.Ne6 Ne6+=; 18.Ne6?! Ne6 19.Bh3 Nf8 20.Bf8 fe5 21.Be7 Qe7 22.bc6 bc6+–) 18...Bf6 19.Bf4 Be5 20.Be5 Qe7 21.bc6 bc6 22.Qd2 Bg4 (22...Kd7+–) 23.Qa5 Kd7 24.Qc5 Qe5 25.Qc6 Ke7 26.Kd2 (26.Qa8! Qd4 27.ed4 Ra8+–) 26...Kf6 (26...Raf8 27.Qc7 Ke8 28.Qb8 Bc8+–) 27.f4 Qe7 28.Kc3 (better 28.Qd5 Nf5 29.Nf5 Bf5 30.e4 Qb4 31.Ke3+–) 28...Rgc8 29.Rb1?? (better 29.Kd2 Rc6 30.Nc6–+) 29...Rc6 30.Nc6 Qe3 31.Re1 (31.Nb4 Qc5 32.Kd2–+) 31...Qc5 (better 31...Qe1 32.Kb2 Qf2 33.a5–+) 32.Kd2 Qc6 33.Re5 (33.Be2 Be2 34.Re2 Qa4–+) 33...Nc4! 34.dc4 dc4 35.Bc4 (35.Rg1 Rd8 36.Kc3 Qb6 37.Bc4 Qg1–+) 35...Qd6 (better 35...Qc4 36.Re3 Rc8–+) 36.Kc3 (36.Bd3 Qb4 37.Ke3 Qb6 38.Kd2 Qf2 39.Kc3 Rc8 40.Kb3–+) 36...Qe5 (better 36...Qa3 37.Kd4 Qb4–+) 37.Kd3?? (better 37.fe5 Ke5 38.Re1 Kf4 39.Re7+–) 37...Qf4 (37...Rd8 38.Bd5 Qd5 39.Kc3 Qd4 40.Kb3 Rb8 41.Ka3 Qb2) 38.Re1 Bf5 39.Kc3 Qe5! 40.Kb4 (40.Re5 Ke5 Combination) 1–0. FeegLood (2495) – Arka50 (2465), lichess.org 2016.

5.Nf3 e6

6.c4 Nf6 7.d4 Ne4 8.Qc2 Bb4 9.Bc3 Nc3 10.Nc3 0–0 11.a3 Ba5 12.Bd3 dc4 13.Bc4 Nd6 (13...Bd7 14.0–0=) 14.Bd3 Bd7 15.a4 c6 16.Ke2 (16.0–0 Rc8 17.Bh7 Kh8=) 16...Qc7 (16...Rc8 17.Bh7 Kh8 18.Ne4 cb5 19.Qb1=) 17.Ne4 (17.Bh7 Kh8 18.Bd3 cb5 19.Nb5 Qc2 20.Bc2 Nb5 21.ab5 Bb5 22.Bd3 Bd3 23.Kd3 Bb4+=) 17...Nf5 (better is 17...Ne4!? 18.Be4 f5=) 18.Ne5+/– White gets the initiative 18...Be8 19.bc6 bc6 20.Nc5 Qc8 (20...Bb6!?+/–) 21.g4+– Nh4 (21...Ne7 22.Bh7 Kh8 23.Bd3+–) 22.Bh7 Kh8 23.Be4 (23.Bd3 Bc7+–) 23...f6 24.Nf3 (24.Nc4 Bc7+–) 24...Nf3 25.Bf3 Bb4 (25...e5 26.Rad1+–) 26.h4 a5 27.Rac1 Ra7 (27...e5 28.h5+–) 28.h5 Re7 29.Nd3 Qa6 (29...Ba3 30.Ra1 Bd6 31.h6+–) 30.Qc4 (30.Bc6 Rc7 31.Qc4 Qc4 32.Rc4 Rc6–/+) 30...Qc4 31.Rc4 c5 32.Nc5 (32.dc5?! Ba4 33.c6 Rc7+–) 32...Rc7 33.Rhc1 Rc5 34.Rc5 (34.dc5?! Ba4 35.Rb4 ab4+–) 34...Bc5 35.Rc5 Ba4 36.Ra5 Bb3 37.Be4 Kg8 38.Bg6 Bc4 39.Kd2 Rb8 40.e4 Kf8 41.f4 White plans g5 41...Rb7 (41...Rb2 42.Kc3 Ra2 43.Rc5+– (43.Kc4?! Ra5 44.e5 fe5 45.fe5 Ra1+=)) 42.Kc3 Rc7 43.Rc5 Rc5 44.dc5 Be2 45.g5 (45.c6 Ke7 46.g5 e5+–) 45...fg5 (45...e5 46.fe5 fg5 47.c6+–) 46.fg5 Bb5 47.Kd4 Ke7 48.Ke5 Bd7 49.h6 gh6 50.gh6 (50.gh6 Kf8 51.Kd6+–) 1–0. Husslein – Frenzel,Lothar, corr SOK–87–16, 1987.

6.c4 Nf6 7.d4 Ne4 8.Nc3 Bb4 9.Qb3 Bc3 10.Bc3 Nc3 11.Qc3 dc4 12.Bc4 Bd7 13.Bd3 Nd6 14.a4 0–0 15.0–0 b6 16.Qc2 g6 17.Rfc1 c6 18.Qb3 Rc8 19.Ne5 cb5 20.ab5 Qe7 21.Qa3 Rc1 22.Rc1 f6 23.Nc6 ½–½. Fournier,Frederic – Deneuville,Christian, AJEC Partie Libre, 1997.

6.c4 Nf6 7.d4 Be7 8.Bd3 Ne4 9.0–0 c6 10.bc6 bc6 11.Nc3 Nfd6 12.Ne5 Bd7 13.Be4 Ne4 14.Ne4 de4 15.Qg4 0–0 16.Qe4 Qc7 17.Rab1 f6 18.Nd7 Qd7 19.Bc3 Rab8 20.Qf3 Qc7 21.h3 Rbd8 22.Rfd1 Bd6 23.a4 a5 24.c5 Be7 25.Rb6 Qa7? 26.Qc6 e5 27.Rb7 Qa8 28.Qe6 Kh8 29.Re7 Rde8 30.de5 f5 31.c6 Re7 32.Qe7 Re8 33.Qe8! Qe8 34.c7 h6 35.Rd8 Kh7 36.Re8 Kg6 37.c8Q Kh5 38.Qf5 g5 39.Ba5 (39...Kh4 40.Qg4#) 1–0. pierre (2125) – rla, internet, 2007.

6.Bd3 Nf6 7.0–0 Be7 8.Bf5 (8.Ne5 0–0=) 8...ef5 9.Nd4 0–0 10.Qf3 a6 (10...Qd7 11.d3=) 11.ba6+= Ra6 12.Nf5 Bf5 13.Qf5 Qd7 14.Qd7 Nd7 15.Re1 Re8 (15...Rfa8 16.a3+=) 16.d3 Bf6 17.Bf6 Nf6 18.Nd2 c5 (18...Rea8 19.Reb1 b6 20.Rb2+=) 19.Reb1+/– Rb8 (19...b6 20.c4+/–) 20.c4 Ra3 (20...dc4 21.Nc4 Nd5 22.Rb5+/–) 21.Rb3 Rb3 (21...Ra4 22.Rb6+/–) 22.ab3 Kf8 23.Ra7 dc4 24.Nc4 (24.Nc4 Rd8 25.Rb7 Rd3 26.Rf7 Kg8 27.Kf1+–) 1–0. marekt – byron_de, ChessWorld.net, 2003.

6.d4 Nf6 7.Bd3 Nd6 8.0–0 Bd7 9.a4 c6 (9...g6 10.Ne5+=) 10.Nc3+/– cb5 11.ab5 Be7 12.Ne5 0–0 13.f3 Re8 (13...Be8 14.e4+/–) 14.Qe2 Qc7 15.e4 de4 (15...Bc8 16.Qe3+/–) 16.fe4+– Bf8 (16...Bc8 17.Qf2+–) 17.Nd7 Qd7? (17...Nd7 18.e5 Nf5 19.Bf5 ef5+–) 18.e5 Nb5 (18...Nf5 19.ef6 Qd4 20.Kh1 Rac8+–) 19.Nb5 Nd5 20.Na7 Nc7 (20...Red8 21.c4 Nb6 22.Bc3+–) 21.c4 Be7 (21...g6+–) 22.Bh7! Kh7 23.Qh5 Kg8 24.Qf7 Kh8 25.Rf3 (25.Rf3 Qd8 26.Rh3 Bh4 27.Qh5 Kg8 28.Rh4 Qh4 29.Qh4+–) 1–0. Pamieci Krzysztofa P – napohybel, internet, 2016.

6.d4 Nf6 7.Be2 Ne4 8.0–0 Bd6 9.c4 b6 10.Nc3 Bb7 11.Qc2 0–0 12.cd5 ed5 13.Bd3 Nh4 14.Ne5 (< 14.Be4 de4 15.Ne4 Nf3 16.gf3 Qh4=+) 14...Qg5 15.f4 (15.Be4 de4 16.g3 Be5 17.de5 Nf3 18.Kg2 Qe5–+) 15...Qf5 16.Rac1 f6? (better is 16...a6!?+=) 17.Nc6 Qe6?? (better is 17...Bc6 18.bc6 Qg6+–) 18.Ne4 (18.Be4?! de4 19.d5 Qe8 20.Ne4 a6+–) 18...de4 (18...Bc6 19.Nd6 Bd7 20.Qc7 Qe3 21.Rf2 Rad8+–) 19.Be4 (better is 19.Bc4 Qc4 20.Qc4 Kh8 21.Qe6+–) 19...Bc6? (better is 19...Rfe8 20.Bh7 Kh8+/–) 20.Bc6+– (20.bc6?! f5 21.Bd3 Qe3 22.Kh1 Rae8+/–) 20...Rad8 21.e4 Qg4 22.e5 fe5 23.Bd5 Kh8 24.fe5 Be7 25.Be4 g6 26.h3 Qg3 27.Rf8 Rf8 28.d5 (better is 28.Qe2 Nf5 29.Bf5 gf5 30.Rc7+–) 28...Bc5+/– 29.Kh1 Rf2 30.Qc3 Qc3 31.Bc3 Nf5 32.d6?? (32.Bf5 gf5 33.d6 cd6 34.ed6 Kg8+–) 32...cd6?? (better is 32...Rf1! 33.Rf1 Ng3 34.Kh2 Nf1 35.Kh1 Ng3 36.Kh2 Nf1 37.Kh1 Ng3 38.Kh2 Nf1=) 33.ed6+– Kg8 34.d7?? (better is 34.Bf5 Rf5 35.Rd1+–) 34...Be7?? (better is 34...Rf1! 35.Rf1 Ng3 36.Kh2 Nf1 37.Kh1 Ng3 38.Kh2 Nf1 39.Kh1 Ng3 40.Kh2 Nf1=) 35.Bb4! Kf8 (35...Bb4 36.d8Q) 36.d8Q 1–0. byron_de – Hammi.Bogart, ChessWorld.net, 2003.

4.Bb2 d6

5.e4 Nfh6 6.d4 f5 7.Nd2 fe4 8.Ne4 Nf6 9.Bd3 Nf7 10.Nf3 e6 11.0–0 Be7 (11...Ne4 12.Be4 d5 13.Bd3+=) 12.c4 0–0 13.Qc2 h6 14.Ng3 b6 (14...Bd7 15.Rfe1+=) 15.Rfe1 Bb7 (15...a6 16.a4+=) 16.Nh4 (16.Re6 Bf3 17.Nf5+–) 16...Nh8? (better is 16...Bc8!?+/–) 17.Re6+– Ng4?? (17...a6+–) 18.Bh7 Kf7 19.Qf5 Nf6 20.Rae1 Re8 21.Ng6 Bc8 22.Nh8 (22.Nh5 Qd7 23.Nh8 Rh8 24.Qg6 Kf8 25.Qg7 Ke8 26.Qh8 Kf7 27.Rf6 Bf6 28.Qf6) 22...Rh8+– 23.Re7 Qe7 (23...Kf8 24.Qg6 Qe7 25.Re7 Ke7 26.Qg7 Kd8 27.Qf6 Ke8 28.Bg6 Kd7 29.Qg7 Kd8 30.Qh8 Ke7 31.Qg7 Kd8 32.Qf8 Kd7 33.Bf5) 24.Re7 (24.Qg6 Kf8 25.Re7 Ke7 26.Qg7 Kd8 27.Qf6 Ke8 28.Bg6 Kd7 29.d5 Rf8 30.Qg7 Rf7 31.Qf7 Kd8 32.Bf6) 24...Ke7+– 25.Qg6 Be6 (25...Kd8 26.d5 Nh7 27.Qg7 Re8 28.Qh7 Bd7+–) 26.Qg7 1–0. Haralambof,Vladimir – Madan,R, Tel Aviv ol (Men) fin–C, 1964.

5.e4 Nh4 6.d4 =.

5.e4 Nh4 6.f4 e6 7.g3 Ng6 8.d3 Nf6 9.Nf3 a6 10.a4 Bd7 11.Nbd2 Be7 12.Bg2 ab5 13.ab5 Ra1 14.Qa1 Bb5 15.0–0 Bd7 16.c4 0–0 17.e5 Ne8 18.d4 d5 (18...Bc6 19.Qe1=) 19.c5 Bb5 20.Rc1 Qd7 21.Qa7 Qc6 22.Qa3 Kh8 (22...f6 23.h3=+) 23.Qe3 (23.h4 Kg8=) 23...b6 (23...f6 24.ef6 Nf6 25.Re1=) 24.cb6 Qb6 25.Ba3 Ba3 26.Qa3 Be2 (26...Kg8 27.Nb3+=) 27.Qc5 Qc5 28.Rc5 Ne7 29.Kf2 Bf3 30.Bf3 c6 31.Bd1 (31.Nb3 Nc7=) 31...Nc7= 32.Ba4 Rb8 33.Bc6 (33.Nf3 Rb2 34.Rc2 Rb6=) 33...Na6=+ (< 33...Nc6 34.Rc6 Nb5 35.Nf3+=) 34.Rc1? (better is 34.Ra5 Nc6 35.Ra6 Nd4 36.Nf3 Nf3 37.Kf3 Rb3 38.Kf2=+) 34...Nb4 0–1. byron_de – marekt, ChessWorld.net, 2003.

5.e4 Nh4 6.Qh5 Ng6 7.Be2 Nf6 (7...e5 8.d4=+) 8.Bf6= ef6 9.Nf3?? (better is 9.Nc3=) 9...Nf4–+ (10.Qd5 Nd5 11.ed5 Be7–+) 0–1. Hardin – Hender, Live Game Caissa's Web, 2004.

5.Nf3 e5 6.c4 Nf6 7.a4 h6 (7...e4 8.Nd4=) 8.Be2 Ng4 (8...e4 9.Nd4=) 9.h3 (better 9.0–0+=) 9...Nf2? (better 9...Nf6+=) 10.Kf2+– e4 11.Nh2 (better 11.Nd4!?+–) 11...Qh4+= 12.Kg1 Ng3 13.Qe1 f5 (better 13...Be7!?+=) 14.Nf1+– Ne2 15.Qe2 Qg5 (15...Be6 16.a5+–) 16.Nh2 (16.Nc3 Qf6+–) 16...h5 (16...Be6 17.a5+–) 17.Nc3 c6 18.Qf2 (18.d3 Qg6+–) 18...Rh6 (18...Be6 19.Rf1+–) 19.Qf4 (19.d4 ed3 20.Nf3 Qe7+–) 19...Qg6 (19...Qf4 20.ef4 Be6 21.Rc1+–) 20.Ne2 (20.d3 ed3 21.Rd1 Be6+–) 20...Be7 21.h4 Qf7 22.Rc1 Bf6 (22...a6 23.Kf2+–) 23.Bd4 (23.Bf6 Rf6 24.Kf2 Be6 25.bc6 bc6+–) 23...c5 (23...Be7 24.c5+–) 24.Bf6 Rf6 25.Nf1 (25.Kf2 Qg6+–) 25...Rg6 (25...Be6 26.Neg3 (26.Qd6?! Bc4 27.Qf4 Be2=) 26...Bc4 27.d4+–) 26.g3 (26.Nfg3 Bd7+–) 26...Qe7 (26...Be6 27.Nc3 (27.Qd6?! Bc4 28.Qg6 Qg6 29.Rc4 b6=+) 27...Rd8 28.Nd5+–) 27.Kh2 (27.Qf2 Be6+–) 27...Rg4+– 28.Qf2 Be6 (28...g5 29.hg5 Qg5 30.Nf4+–) 29.Rg1 (29.Kg2 Rg6+–) 29...0–0–0 (better 29...Qf7+–) 30.Kh3?? (better 30.Kg2!?+–) 30...g5 (30...f4!? 31.Kh2 fg3 32.Rg3 Rf8=+ (worse 32...Qh4 33.Kg1+=)) 31.hg5 (31.Nh2 Rf8 32.b6 a6+=) 31...Qg5 (31...Rh8!? 32.Nf4 h4+=) 32.Nf4+– Bf7? (better 32...Qg8+–) 33.Nh2+– Rh8 34.Ng4 hg4 (34...Qg4 35.Kh2 h4 36.Nh3 hg3 37.Rg3+– (37.Qg3?! Qh5+–)) 35.Kg2 b6 36.Nd5 (better 36.a5+–) 36...Bd5?? (36...Rh2 37.Kf1 Rf2 38.Kf2 Bd5 39.cd5–+) 37.cd5? (better 37.Rgf1 Be6 38.Qf4=) 37...Qf6?? (better 37...Rh2! 38.Kf1 Rf2 39.Kf2 f4 40.ef4 Qd5–+) 38.Qf4 Rd8 (38...Re8 39.Rgf1 Re5 40.Qg4+–) 39.Rh1 Qf7 (39...Kb8 40.Rcf1 Qb2 41.Qf5+–) 40.Rh4 (better 40.Rcf1!? Qd5 41.Qf5 Qf5 42.Rf5 Rd7+–) 40...Qd5 41.Rch1 (better 41.Rf1 Rf8+–) 41...Qd2 42.Qf2 Qf2 43.Kf2 Rf8 (43...d5+–) 44.Rh7 Kb8 45.Rd7 Rc8 (45...d5 46.Rhh7 d4 47.Rb7 Ka8 48.Ra7 Kb8 49.Rhb7 Kc8 50.Rb6+–) 46.Rd6 (46.Rhh7 Re8 47.Rb7 Ka8 48.Ra7 Kb8 49.Rhb7 Kc8 50.Rb6 Re6 51.Ra8 Kc7 52.Rc6 Kb7+–) 46...c4 47.Rc1 (47.Rh7!? c3+–) 47...c3 48.Rc2 (48.Rd5 Rf8+–) 48...Rc4 49.Rd5 Kc7 50.Rf5 Kd6 51.Rf4 (better 51.Rg5 Ke6+–) 51...Ke5 (51...Kc5 52.Rg4 Kb4+–) 52.Rg4 Ra4 (52...Kf6 53.Rf4 Kg6 54.g4+–) 53.Rc3 Ra2 54.Kg1 Rd2 (54...Kf5 55.Rf4 Kg5 56.Rc8+–) 55.Rf4 (55.Rc6 Rd1 56.Kg2 Rd2 57.Kh3 Rf2+–) 55...Rd5 (55...a5 56.ba6 Ra2 57.Rc4 Ra6 58.Rfe4 Kd6 59.Red4 Ke5 60.Rb4+–) 56.Rc7 (better 56.g4!? Rd1 57.Kf2 Rd6+–) 56...Rb5 57.Ra7 Rb1 58.Kg2 1–0. Abdullaevich (1840) – excubitor (1815), lichess.org, 2020.

5.Nf3 e5 6.c4 Nf6 7.Nc3 Be6 8.Bd3 Be7 9.e4 Nh6 10.h3 0–0 11.0–0 Nd7 12.Be2 f6 13.d4 b6 14.Qc2 Kh8 15.Nd5 Bd5 16.cd5 ed4 17.Nd4 (17.Bd4?! Nc5+–) 17...Nc5 18.Ne6 Ne6 19.de6 d5 20.Rad1 Bd6 21.ed5 (21.Rd5?! Re8 22.Bc4 Re6+–) 21...Qe7 22.Bd3 g6 23.Rfe1 Ng8 24.h4 Qg7 25.h5! Ne7 (25...gh5 26.Qe2 Decoy) 26.hg6 hg6 27.Re3 Kg8 28.Rh3 Be5 29.Bc1 Rfd8 30.Bh6 Qh7 31.Be4 f5 32.Bf3 Rab8 (32...Rac8+–) 33.Qe2 Bf6 34.Bf4 Qg7 35.Bc7 Rbc8 (35...g5 36.Bh5 Ng6 37.Bd8 Rd8 38.Bg6 Qg6 39.e7 Be7 40.Qe7+–) 36.d6 g5 (36...Qf8 37.Bd8 Rd8 38.de7 Rd1 39.Qd1 Qe7 40.Qd5+–) 37.Bd8 Rd8 38.Bh5 Ng6 (38...g4 39.Bf7 Kf8+–) 39.e7 Re8 40.Qe6 Qf7 41.d7 Re7 (41...Qe6 42.de8Q Kg7 43.Qg6 Kh8 44.Be2) 42.d8Q Kg7 43.Qf7 Rf7 44.Qe8 g4 (44...Re7 45.Qg6 Kf8 46.Rd8 Re8 47.Re8) 45.Rd7 Rd7 (45...Be7 46.Re7! Ne5 47.Rf7 Nf7 48.Qf7 Kh8 49.Bg4) 46.Qg6 Kh8 (46...Kf8 47.Qf6 Kg8 48.Bf7 Rf7 49.Rh8) 47.Bg4 1–0. b4_player – story, casual, 2013.

5.Nf3 e5 6.Be2 Nf6 7.0–0 b6 8.d4 Qd7? (better 8...e4 9.Nfd2 a6+=) 9.de5+– de5 10.Ne5 Qd1 11.Rd1 Bd6? (better 11...Bb7+–) 12.Bf3 Nh4 (12...Rb8 13.Nc6 Ra8+–) 13.Bc6 (better 13.Ba8!? a6+–) 13...Nd7 14.Nd7 Bd7 15.Ba8 Bb5 (15...0–0 16.Bc6 Bc6 17.bc6+–) 16.Bg7 Rg8 17.Nc3 (better 17.Bf6 Be7 18.Bh4 Bh4+–) 17...Rg7 (17...Bd7 18.Bd4+–) 18.Nb5 Rg2 (18...Ke7 19.Na7 Nf5+–) 19.Bg2 Be5 20.Bc6 Ke7 21.Rd7 Kf6 22.Rad1 1–0. GuestJPPT – GuestTBGM, freechess.org, 2018.

5.Nf3 e5 6.e4 Nh4 7.d4 Bg4 8.Qd3 Bf3 9.gf3 Ng6 10.Nc3 Nf6 11.0–0–0 Nd7 12.Qe3 Be7 13.Rg1 h6 14.Kb1 Bg5 15.Qe1 a6 16.ba6 ba6 17.Nd5 c6 18.Ne3 Rb8 19.Nf5 (19.Ba6 Be3 20.Qe3 Qb6–/+) 19...0–0 20.Ka1 (< 20.Nd6 Rb2 21.Kb2 Qb8 22.Ka1 Qd6–+) 20...Bf6 21.Bh3 (< 21.Nd6 Rb2 22.Kb2 Qb8 23.Ka1 Qd6–+) 21...Qc7 22.Qd2 Rfd8 23.f4 Nb6 24.fe5 de5 25.Qa5 ed4 26.Qa6 Ra8 (26...c5–/+) 27.Qd3–+ Na4 (27...Qh2 28.Qb3 Kh8 29.Nh6 (29.Qb6 Qh3 30.Bd4 Qf3 31.Qc6 Qa3–+; 29.Nd4?? Bd4 30.Bd4 Rd4–+) 29...gh6 30.Qf7+–) 28.Rb1 Nb2 29.Rb2 Nf4 (29...Qh2?! 30.Qg3 Qg3 A) 31.fg3?? d3 32.cd3 Rd3–+ (32...Bb2?! 33.Kb2 Rd3 34.Rg2–+); B) 31.Rg3–+) 30.Nh6 (30.Ng7 Bg7 (30...Nd3 31.Ne6 Kh8 32.Nc7 Nb2 33.Na8–+) 31.Qg3 Qe5–+) 30...Kh8 31.Qd2 d3 32.c3 Ne2 33.Rc1 Rdb8 (33...Nc1 34.Qc1 Ra3 35.Kb1 Rc3 36.Qd2 Qh2 37.Nf7 Kg8 38.Qd1 Kf7 39.e5 Be5 40.Qh5 Ke7 41.Qh4 Bf6 42.Rb7 Kd6 43.Qb4 Rc5 44.Qe1 Qh3 45.a4–+) 34.Rb8 Rb8 35.e5 (35.Bf5 Nc1 36.Qc1–+) 35...Be5 (35...gh6 36.Qh6 Kg8 37.ef6 Qg3 38.fg3 Rb1 39.Rb1 Nc3 40.Rb8#; 35...Nc1 36.ef6 Qh2 37.fg7 Kh7 38.Bf5 Kg7 39.Qg5 Kf8 40.Qg8 (40.Qc1?? d2 41.Qd1 Qf2–+) 40...Ke7 41.Qf7 Kd6 42.Qd7 Kc5 43.Qd4 Kb5 44.Qb4 Ka6 45.Qa3 Kb7 46.Qc1+–) 36.Ng4 Nc1 37.Qc1 d2! 38.Qd2 Qb6 (39.Qd8 Rd8 40.a4 Bc3 41.Ka2 Qb2#) 0–1. PassedPawn – marekt, ChessWorld.net, 2003.

5.f4 c5 6.c4 (6.Nf3 d5+=) 6...e6= 7.Nf3 b6 (7...Be7 8.g4 Bf6 9.Nc3+=) 8.e4 (8.Bd3 d5+=) 8...Nfe7 9.d3 (9.d4 Ng6 10.Qd2 Nf6+=) 9...Bb7 (9...d5 10.Na3=) 10.Be2+= Ng6 (10...d5 11.ed5 ed5 12.0–0=) 11.Qd2 Nf6 12.0–0 d5 (12...Qd7 13.f5 ef5 14.ef5+=) 13.ed5 (13.f5 ef5 14.ed5 Qd6+/–) 13...ed5+= 14.d4 (14.f5 Ne7+=) 14...Ne4 (14...Bd6 15.Qe3 Qe7 16.Ne5=) 15.Qe3 Be7 (15...Qf6 16.Ne5 cd4 17.Bd4 Ne5 A) worse is 18.Be5 Bc5 19.Qc5 bc5 (worse is 19...Nc5 20.Bf6 gf6 21.cd5+/–) 20.Bf6 Nf6+=; B) 18.fe5+=) 16.f5+= Nh4 17.Nh4 Bh4 18.cd5 Bg5?? (better is 18...Bd5 19.Bf3 Bg5+=) 19.Qe4+– Be7 (19...Qe7 20.Qe7 Be7 21.Rd1+–) 20.dc5 (20.f6!? gf6 21.Bc4 Rc8+–) 20...Bd5 21.Qg4 Bc5 (21...Bf6 22.Nc3 h5 23.Qg3 Bd4 24.Kh1+–) 22.Kh1 f6 (22...Qc7 23.Bg7 (worse is 23.Qg7 0–0–0 24.Nc3 Bd4+–) 23...h5 24.Qg5+– (24.Bh8?! hg4 25.Nc3 Bb7+=)) 23.Qg7 (better is 23.Rd1!? Qe7 24.Rd5 0–0+–) 23...Rg8 (23...Qe7 24.Bh5 Kd7 25.Qf6 Rhg8 26.Qe7 Ke7+–) 24.Bh5 1–0. Berg Christensen – Haugen,Arild, 1973.

5.f4 e5 6.Nh3 =.

4.Bb2 e6

5.c4 Bc5?? 6.g4+– Nd6?? (6...Ne3 7.de3 f6+–) 7.Bg7 Nh6 8.Bh8 c6 9.Bg7 Ng8 10.Bd3 (10.a3!? cb5 11.cb5 Ne4+–) 10...cb5 11.cb5 Qg5 12.Bb2 (better is 12.Bd4 Bd4 13.ed4+–) 12...Qd5 13.Bh7 (better is 13.Nf3!? Qd3 14.a4 Nc4+–) 13...Qh1 14.Kf1 Ne7 15.h3 Qd5? (better is 15...Nb5!? 16.d4 Bb4+/–) 16.d4 Bb6 17.a4 Nc4 18.Bc3 a6 19.Nf3 (19.a5!? Bd8 20.b6 Qb5+–) 19...ab5+/– 20.e4 Qc6 21.ab5 Qb5 22.Kg2 Ra1 23.Ba1 Ba5 24.Bc3 b6 25.Ba5 Na5 26.Nc3 Qc6 27.Qd3 Qc4 28.Qc4 Nc4 29.e5 Bb7 30.Kg3 Nd5 31.Nd5 Bd5 32.Bd3 Nb2 33.Bb5 Nd1 34.Ne1 Nc3 35.Bd3 b5 36.Nc2 Ke7 37.f4 d6 38.h4 de5 39.de5 Bb3 40.Nd4 Bc4 41.Bc4 bc4 42.Kf3 Nd5 43.Nc2 c3 44.Ke4 Kf8 45.f5 Nc7 (45...Kg8+–) 46.f6 Kg8 47.g5 Kh7 48.h5 Nd5 49.Kf3 Nb6 50.Ke3 (better is 50.Nd4!?+–) 50...Nd5+/– 51.Kd3 Nf4 52.Kc3 Nh5 53.Nd4 Kg6 54.Nf3 Kf5 55.Kd3 Nf4 56.Ke3 Nh3 Exerts pressure on the backward pawn (56...Ng6 57.Kd4=) 57.g6 (57.Kd4!?+=) 57...Kg6= 58.Nh4 Kg5 59.Nf3 Kf5 60.Kd4 Nf4 61.Nd2 Ne2 62.Ke3 (62.Kd3!?=) 62...Ng3 (62...Ke5!? 63.Ke2 Kf6 64.Ne4 Kg6=) 63.Kd4 ½–½. hal1958 – fighter, playchess.de, 2003.

5.c4 d5 6.Nf3 Nf6 7.d4 Ne4 8.c5 Bd7 (8...Qf6 9.Nc3+=) 9.Nc3+= Nf6 (9...Nc3 10.Bc3 a6 11.ba6 ba6 12.Bd3+=) 10.Bd3+/– c6 (10...Be7 11.0–0+/–) 11.a4 (11.Ne5 cb5 12.Nd7 Nd7 13.Nd5 b6+–) 11...Ne7 (11...Be7 12.0–0+/–) 12.0–0 (12.Ne5 g6+–) 12...Qc7 (12...g6 13.Ne5+–) 13.a5 (13.Qe2 Ng6+–) 13...g6 (13...Ng6 14.a6+–) 14.a6 Nc8? 15.e4 de4 16.Ne4 Nd5 17.Nf6! Ke7 18.Nd7 Kd7 19.ab7 Qb7 20.bc6 Kc6 21.Qa4 Kc7 22.Qa5 Kd7 23.c6! Kc6 24.Ne5 (24...Kd6 25.Qc5) 1–0. pierred – all knight, chessworld.net, 2006.

5.c4 Nf6 =.

5.Nf3 b6 6.a4 (6.Bd3 Bb7+=) 6...a5 7.ba6 Qf6?? (better is 7...Nf6+=) 8.Bf6+– gf6 (8...Nf6 9.a5+–) 9.d4 (9.a5!? ba5 10.Ra5 Nge7+–) 9...Bb4 10.c3 Bd6 (10...Ba5 11.e4 Nd6 12.Qc2+–) 11.a5 Nge7 (11...Ba6 12.ab6 Bb7 13.Ra8 Ba8 14.Qa4+–) 12.Nbd2 b5 (12...Nc6 13.ab6 cb6 14.e4+–) 13.e4 Ng7 14.e5 fe5 15.de5 Bc5 16.Ne4 0–0 17.Nc5 Nd5 18.c4 bc4 19.Bc4 Nf4 20.Qd2 Ng6 21.Ne4 Kh8 22.Nf6 Rd8 23.Qh6 Nf8 24.Ng5 (24.Ng5 Ba6 25.Nf7) 1–0. gioco1b4 – Mcvicar, ChessWorld, 2012.

5.Nf3 d5 6.Bd3 Qe7 (6...Nf6!?+=) 7.0–0 Bd7 (7...Nf6 8.h3+–) 8.Nc3 Nd6 (8...Nf6 9.Ne5+–) 9.a4 Nf6 10.a5 (10.Ne5 h5+–) 10...h6 (10...Nfe4!?+–) 11.Ne5 Bc8 (11...Nfe4 12.a6 ba6 13.Ra6+– (13.Nd7?! Qd7 14.Be4 Ne4+–)) 12.a6+– Nd7 13.f4 Ne5 (13...h5+–) 14.fe5 ba6?? (14...Nc4 15.Bc4 dc4+–) 15.ed6 Qd6 (15...cd6 16.Qh5+–) 16.Qh5 g6 (16...Qd7 17.Rf7!! Qf7+–) 17.Bg6! fg6 18.Qg6 Kd7 19.Rf7 Be7 20.Ba3 c6 1–0. DEFFM – Jpscom, freechess.org, 2019.

5.Nf3 Nge7 6.c4 d5 7.a4 Bd7 8.Nc3 c6 9.Be2 dc4 10.Bc4 cb5 11.Bb5 Bb5 12.Nb5 Qd3?? (better is 12...a6 13.Nbd4 Nd4 14.Bd4 Nc6=) 13.Nc7+– Kd8 14.Na8 Ke8 (14...Ng6 15.Qb1 Qb1 16.Rb1+–) 15.Nc7 Kd8 16.Nb5 (16.Ne5 Qe4 17.Nf7 Kc7 18.Nh8 Qg2 19.Rc1 Kd7+–) 16...Nc6 17.Rc1 (17.Na7!? Nb4 18.Rc1 Nd6+–) 17...Ke8 18.Qc2 Nb4 (18...Qc2 19.Rc2 a6 20.Nc7 Kd7+–) 19.Qc8 Ke7 (19...Qd8 20.Ne5 Nd6 21.Nd6 Bd6 22.Qb7 Be5+–) 20.Rc7 Qd7 21.Rd7 1–0. Fournier,Frederic – reytop2003, Active, 2004.

4.Bb2 Nf6

5.c4 a6 6.a4 (6.ba6 Ra6 7.Nf3 e6=) 6...ab5 7.ab5 Ra1 8.Ba1 d5 9.Nf3 dc4 10.Bc4 Be6? (better 10...Nd6!? 11.d3 Bf5=) 11.Be6+– fe6 12.Qb3 Qd5 13.0–0?? (better 13.Qa4 Nd6 14.Nc3+–) 13…Qb3–+ 0–1. AhmedSultanov (1645) – Tango_1317 (1635), lichess.org, 2019.

5.c4 Ne4 6.Qf3 (better is 6.Qc2 d5 7.Nf3+/–) 6...Ned6?? (better is 6...d5 7.Nc3 Nh4+=) 7.c5+– e6 (7...Nh4 8.Qh3 Ndf5 9.g4+–) 8.cd6 Nd6 9.a4 Nc4 (9...a6 10.Nc3 ab5 11.Nb5 Nb5 12.Bb5 c6+–) 10.Bc4 a6 11.ba6 ba6 (11...d5+–) 12.Qa8 Bb4 13.Bg7 Rg8 14.Bc3 c5 15.Ne2 Ke7 16.Qf3 d5 17.Bf6 Kd7 18.Bd8 Rd8 19.Qf7 Kd6 20.Bd3 Rd7 21.Qf4 (better is 21.Qe8 Kc7 22.Qe6 Rd6+–) 21...e5 22.Qf6 Kc7 23.Qe5 Rd6 24.Bh7 (24.Nf4 Ba5 25.Nd5 Kd7 26.Bf5 Kc6 27.Ne7 Kc7 28.Nc8 Kb8 29.Qd6 Kb7 30.Qd7 Bc7 31.Nd6 Kb6 32.a5 Ka7 33.Qc7 Ka8 34.Be4) 24...Kd7 25.Bf5 Kc7 26.Bc8 d4 27.Qe7 Kc6 1–0. Hal1958 – Waller, playchess.de, 2002.

5.c4 g6 6.Nf3 Bg7 7.Be2 0–0 8.0–0 b6 9.Nc3 Bb7 10.a4 d5 (10...c5 11.d3=) 11.h3 (11.Nd5 Nd5 12.Bg7 Ng7 13.cd5 Bd5+–) 11...Re8 (11...d4 12.ed4 Nd4 13.Nd4 Qd4 14.Qc2=) 12.a5 dc4 13.a6 Bd5 14.Nd5 (14.Ne5 Nd6+=) 14...Qd5= 15.Rc1 Qb5 16.Bf6 Bf6 17.Bc4 Qa5 18.d4 Nd6 19.Be2 Rac8 20.Rc6 Nb5 (20...e5 21.de5 Be5 22.Qb3=) 21.Qb3 Nd6 22.Rfc1 Attacking the backward pawn on c7 22...Ne4 23.Rc7 Rc7 (23...Nd6!?+–) 24.Rc7+– Nd2 25.Qb5 (25.Nd2 Qd2 26.Qb5 Rb8+–) 25...Nf3+– 26.gf3 Qe1 27.Kg2 (27.Bf1 Ra8+–) 27...Ra8 (27...Bh4!? 28.Qe8 Kg7=) 28.Bc4 (28.Bd3 Bh4 29.Qb2 Qa5+–) 28...Bh4 The mate threat is Qxf2 29.Qb2 e6? (29...Qa5 30.Bb5 e6 31.Kf1+–) 30.Qa2?? (30.d5 e5 31.d6 Rf8+–) 30...Kf8? (30...Qc1 31.Rd7 Rc8=) 31.d5 (better 31.Be6 fe6 32.Rh7 Bf2 33.Qf2 Qf2 34.Kf2+–) 31...ed5?? (better 31...Qc3 32.de6 Be7+–) 32.Bd5 Rd8 (32...Qf2 33.Qf2 Bf2 34.Ba8 Be3 35.Ra7 b5+–) 33.Rf7 Ke8 (33...Kg8 34.Ra7 Kf8 35.Qa3 Qb4 36.Qb4 Rd6 37.Qd6 Be7 38.Qe7) 34.Qa4 Rd7 (34...b5 35.Qb5 Rd7 36.Qd7) 35.Qd7 (35.Rd7?! Qf2 36.Kh1 Qe1 37.Kg2 Qg3 38.Kh1 Qh3 39.Kg1 Qg3 40.Kh1 Qh3 41.Kg1 Qg3 42.Kh1 Qh3=; 35.Qh4 Rf7 36.Bf7 Kf7 37.Qh7 Kf6 38.Qa7 Qa5+–) 1–0. RichardSommer (2130) – chengel (2095), lichess.org, 2020.

5.Nf3 b6 6.Be2 (6.Bd3 Nd6+=) 6...Bb7 (6...a6 7.Bd3 e6 8.Nc3=) 7.0–0 Bf3 (better 7...e6!?=) 8.Bf3+– (8.gf3?! e6=) 8...Rb8 (8...Rc8 9.d3+–) 9.c4 (9.d3 e6+–) 9...Nh4 (9...e6 10.Nc3+–) 10.g3 (10.Bf6 Nf3 11.Qf3 gf6+–) 10...Nf3+= 11.Qf3 e6 12.Nc3 (12.Be5 Be7+=) 12...Bb4 (12...Ra8 13.e4+=) 13.a3 Ba5 (13...Be7 14.e4+=) 14.d4 (14.e4 0–0+=) 14...Bc3 15.Bc3 d5 (15...a6 16.ba6 Ra8 17.e4+=) 16.Bb4 (16.Rfc1 a6+=) 16...dc4 (16...Rc8 17.Rfc1+=) 17.Qc6+– Qd7 18.Qc4 Ne4 (18...Ra8 19.Rfc1+–) 19.Rac1+– Rc8 20.Qc6 (20.f3 Nd6 21.Bd6 Qd6 22.Qc6 Kd8+–) 20...Qc6 21.Rc6 Nf6 (21...a5 22.ba6 Kd7 23.Rfc1+=) 22.Bd6+– Kd7 23.Be5 (23.Bf4 a5+–) 23...Rhg8 (23...a6 24.a4+–) 24.f3 (24.Rfc1 Ne8 25.h4 Nd6+=) 24...Ne8 (24...a6 25.a4+=) 25.g4+– f6 26.Bg3 g5 (26...a6 27.a4+–) 27.e4 (27.Rfc1 h5+–) 27...a6 28.a4 ab5 (28...h5 29.gh5 Rh8 30.Rfc1+–) 29.ab5 Ra8 30.Rfc1 Ra5 (30...Ra7!?+=) 31.Bc7+– Rb5 32.Bb6 Rb3 (32...Rh8 33.Kg2+–) 33.Kg2 (33.R1c3 Rc3 34.Rc3 h5+–) 33...f5 (better 33...h5+–) 34.Rc8?? (better 34.gf5 ef5 35.d5 Rb2 36.R1c2 Rc2 37.Rc2+–) 34...Rb2 (34...Rb6 35.Ra8–+) 35.Kh3 (35.R1c2 Rb6 36.gf5 ef5–/+) 35...fg4–+ 36.fg4 Rb6 37.e5 (37.Ra8 Rb7–+) 37...Rb7 38.Ra8 (38.R8c4–+) 38...Rb3?? (better 38...Nf6! 39.Ra2 Nd5–+) 39.Kg2= Rb2 40.Kg1? (better 40.Kg3=) 40...Rb7–+ 41.h3 (41.Rcc8 Rf8–+) 41...Rg7 (41...Nf6 42.Rg8 Ng8 43.Rf1–+) 42.Rcc8 Nc7 43.Rd8 Ke7 (better 43...Kc6 44.Rd6 Kb5–+) 44.Rd6?? (better 44.Rac8–+) 44...Rb1 45.Kg2 Na8 46.Kf2 (46.Rc6 Nb6–+) 46...Rb2 (46...Rf7 47.Ke2 Rb2 48.Ke3–+) 47.Ke3 (47.Kg3 Nc7 48.Rc6 Nb5–+) 47...Nc7 48.Kd3 Nb5 (48...Rf7 49.Ke3 Nd5 50.Rd5 ed5 51.e6 Ke6 52.h4 Rbf2 53.hg5 R7f3) 49.Kc4 (49.Rb6 Rf7 50.Rb7 Kf8 51.Rf7 Kf7 52.Kc4 Na3 53.Kc5 Rb5 54.Kc6–+) 49...Nd6 50.ed6 Kd6 1–0. DEFFM – Jangkrikboss, freechess.org, 2016.

5.Nf3 d6 6.Nc3 Bd7 (6...e5 7.Bd3=) 7.e4+= Nh6 8.h3 (8.Be2 e5+=) 8...e6 9.g4 Nhg8 10.e5 de5 11.Ne5 Bd6 12.d4 (12.Nd7 Nd7 (12...Kd7? 13.Qf3+–; 12...Qd7? 13.g5+–) 13.Bg2 Rb8+=) 12...Bb4 (12...Nd5!?=) 13.Qf3+= (worse 13.Nd7 Qd7 14.a3 Ba5=+) 13...c6? (13...Bc8 14.0–0–0 Qe7 15.Nc6+–) 14.bc6 (14.g5 Qb6 15.gf6 Nf6+–) 14...bc6? (14...Bc6 15.Nc6 bc6 16.Qc6 Kf8 17.Ba6+=) 15.Nc6 (better 15.g5!?+–) 15...Bc3 (15...Bc6 16.Qc6 Kf8 17.Ba6+=) 16.Bc3 Qc7 17.Ne5 Ne7?? (better 17...Rc8 18.Bc4 Ba4+–) 18.Qa8+– Nc8 19.Bb4 Nd5 20.Bc5 f6 (20...Qa5 21.Ke2 Qc3 22.Rc1+–) 21.Nd7 Qd7 (21...Kd7 22.Bb5 Kd8+–) 22.Bb5! Qb5 23.Qc8 Kf7 24.Qh8 Nf4 25.0–0–0 e5 26.Rhe1 Qa4 27.de5 Ng6 28.e6 1–0. bulent_2010 – shm19cs, ChessWorld.net, 2018.

5.Nf3 d6 6.Bf6 gf6 7.d4 (7.c4 e6=) 7...Bg7 (7...d5 8.c4=) 8.c4 e5 9.Nc3 (9.Qc2 Ne7=) 9...Be6 (9...Ne7 10.Qc2=) 10.Bd3 Ne7 11.Be4 (11.Qc2 f5 12.de5 de5= (< 12...Be5 13.0–0+/–)) 11...d5 (11...Qb8!?=) 12.cd5+/– Nd5 13.Rc1 0–0 (13...a6!?+/–) 14.Bd5 Bd5 15.de5 Bf3 (15...Be6 16.Qd8 Rfd8 17.ef6 Bf6 18.Ne4+/–) 16.Qf3+– (16.gf3?! fe5 17.Qd5 c6 18.bc6 bc6=) 16...fe5 17.Qb7 Qc8 18.Qc8+– Rac8 19.Nd5 Rfe8 20.e4 f6 21.Rc6 Kf7 22.Ra6 Red8 23.Ra7 Ke8 24.Nc7 Rc7 25.Rc7 Bf8 26.Rh7 Rb8 27.a4 Ra8 28.0–0 Ra4 29.Rc1 Ra8 30.b6 Rb8 31.b7 Kd8 32.h4 (32...f5 33.ef5 Rb7 34.Rb7+–) 1–0. pierre – Kingduke, ChessWorld.net, 2005.

5.h3 d5 (5...d6 6.Bf6 ef6 7.Nf3=) 6.Nf3 Ne4 (6...e6 7.Be2=) 7.g4 (7.Be2 a6=) 7...Nfd6 8.d3 Nf6 (8...Nc5 9.Ba3 Nd7 10.Bd6 cd6 11.d4=) 9.g5 (9.c4 dc4 10.dc4 h5=) 9...Nd7 10.d4 (10.Nc3 c6=) 10...e6=+ 11.Nbd2 Be7 12.h4 (12.Bd3 Bg5 13.Rg1 Bf6=+) 12...a6 (12...0–0 13.Bd3=+) 13.a4 (13.ba6 b6=) 13...ab5=+ 14.ab5 Ra1 15.Qa1 (15.Ba1 Nb6=+) 15...Nb6 (15...h6 16.Rg1=+) 16.Ne5 (16.Qa5 h6 17.g6 f6=) 16...Bd7 (16...h6=+) 17.c4 (17.Qa5 h6=+) 17...Ndc4 (17...dc4 18.Ndc4 Nbc4 19.Nc4 Nb5 20.Ne5 Bb4 21.Kd1–/+) 18.Nd7 (18.Ndc4 dc4 19.Nc4 Nc4 20.Bc4=+) 18...Nd2 (18...Qd7 19.Nc4 dc4 20.Bg2–/+) 19.Kd2?? (better 19.Nb6!? Nf1 20.Na4 Ne3 21.fe3+=) 19...Bb4 (19...Qd7 20.Qa7 Qc8 21.Bd3–/+) 20.Bc3 Bc3 21.Qc3 Qd7 22.Qc5 (22.Bd3 h6 23.Ra1 hg5 24.hg5 Rh2–/+) 22...Qd6 (22...h6!? 23.gh6 Rh6–/+) 23.Qd6=+ cd6 24.Bd3 Ke7 (24...Kd7 25.Ra1=+) 25.Rc1 (25.Ra1 e5=) 25...Kd7=+ 26.f3 (26.h5=+) 26...f6 (better 26...h6!?=+) 27.gf6+= gf6 28.Rg1 f5 (better 28...Kc8!?+=) 29.Rg7+– Kc8 30.Re7 Rg8 (30...Nc4 31.Bc4 dc4 32.Re6+–) 31.Re6+– (worse 31.Rh7 Rg2 32.Ke1 Nc4+=) 31...Rg2 (31...Nc4 32.Bc4 dc4 33.Rd6+–) 32.Kc3 Nc4 (32...Rg3 33.f4+–) 33.Bc4 dc4 34.Kc4 Rf2 (34...Rg3 35.Re7+–) 35.Rd6 (35.Kd5!? Kc7 36.f4 Rf3+–) 35...Rf3 36.Re6 (36.Rh6 Re3 37.Rh7 Re2+–) 36...Kd7 (36...Kd8 37.Rh6 Re3 38.Rh7+–) 37.d5 (better 37.Rh6 Re3 38.Rh7 Kc8+–) 37...Rf2? (37...h5 38.Kc5+–) 38.Kd3 (better 38.Rh6!? Rf3 39.Rh7 Kd6 40.Rh6 Kd7+–) 38...Rb2 39.b6 Rb3 40.Kd4 (40.Kc4 Ra3+–) 40...Rb4 41.Ke5 Re4 (41...Rh4 42.Kf5 Rh5 43.Ke4+–) 42.Kf5 Re6 (42...Rh4 43.e4 Rh1+–) 43.de6 Ke7 44.e4 h6 45.h5 (45.Ke5 h5 46.Kd5 Kf6 47.Kd6 Kg6 48.e7 Kf6 49.e8Q Kg7 50.Ke7 Kh6 51.Kf6 Kh7 52.Qd7 Kh6 53.Qg7) 45...Kd6 46.Kf6 1–0. DEFFM – GuestFZXT, freechess.org, 2016.

5.Nf3 d5

6.c4 dc4 7.Bc4 e6 8.0–0 Bd6 9.Nc3 0–0? (9...Nd5 10.Nd5 ed5 11.Bd5 Bh2 12.Nh2 Qd5 13.e4 Qb5 14.Rb1+–) 10.a4?? (10.e4 Nh4 11.Nh4 Ne4+–) 10...b6? (better 10...Be7+=) 11.e4+– Nh6 12.d4 White plans e5 (12.e5 Bb7 13.ed6 cd6+–) 12...c5? (better 12...Bb4!? 13.Qc2 Bb7+–) 13.bc6 (13.e5 cd4 14.Qd4 Nf5+–) 13...Nfg4? (better 13...Bb4 14.Bd3 Nh5+–) 14.h3 Nf6 15.e5 Nfg4 (15...Bc7 16.ef6 Qf6+–) 16.ed6 Qd6 17.Ba3 (better 17.hg4 Qc6 18.Ne5 Qc7+–) 17...Qf4 (17...Qc6 18.Qe2 Bb7 19.Bf8 Kf8+–) 18.hg4 (18.Bf8 Kf8 19.hg4 Ng4+–) 18...Ng4 (18...Rd8 19.Be7 Re8 20.Bg5 Qg4 21.Bh6 gh6 22.Ne5+–) 19.Bf8 Ne3 (19...Kf8 20.Qd3 Nf6+–) 20.fe3 Qe3 21.Kh1 Kf8 22.Qd3 (22.Qd3 Qd3 23.Bd3+–) 1–0. retiponziani (1865) – braken (1700), ChessWorld.net, 2011.

6.d4 e6

7.Bd3 a6 8.ba6 ba6 9.Nbd2 (9.Ne5 Nd7 10.Nc3 Ne5 11.de5 Qg5 12.0–0 c5 13.e4 Nh4 14.g3=; 9.Nc3 Rb8 10.Rb1 Bb7 11.0–0 Bd6 12.Qe2 Qc8 13.Na4 0–0 14.Nc5=; 9.Ba3 Ba3 10.Na3 Qd6 11.Bf5 Qa3 12.Bd3 Qc3 13.Nd2 c5 14.dc5=; 9.c3 Rb8 10.Ba3 Ba3 11.Na3 c5 12.Rb1 Rb1 13.Nb1 Qa5 14.dc5=; 9.c4 dc4 10.Bc4 Bd6 11.Nc3 Bb7 12.Qe2 Rb8 13.Rb1 Ne4 14.0–0=) 9...Bd6 10.c4 Rb8 11.Rb1 dc4 12.Nc4 Bb7 13.Qa4 Qd7 14.Qd7 +=.

7.Bd3 Bb4 A) 8.Nbd2 A1) 8...0–0 9.a4 (9.a3 Be7 10.0–0 Nd6 11.a4 a6 12.ba6 ba6 13.Ne5 Bb7 14.Rb1+=; 9.Rb1 Bd7 10.0–0 Rc8 11.Bc1 Qe7 12.Ne5 c5 13.bc6 Bc6 14.c4+=; 9.Ne5 a6 10.ba6 b6 11.c3 Bd6 12.Qe2 c5 13.Bb5 Ne8 14.Nc6=; 9.0–0 Bd7 10.Ne5 c6 11.bc6 Bc6 12.a3 Bd6 13.c4 Be5 14.de5+=) 9...a6 10.0–0 Qe7 11.c3 Bd6 12.c4 b6 13.Qc2 Rd8 14.Ne5+=; A2) 8...Bd7 9.Ne5 (9.0–0 0–0 10.Ne5 c6 11.bc6 Bc6 12.a3 Bd6 13.c4 Be5 14.de5+=; 9.a4 a6 10.ba6 ba6 11.0–0 0–0 12.c4 dc4 13.Nc4 Bc6 14.Nce5+=; 9.Rb1 c6 10.bc6 Bc6 11.a3 Bd6 12.0–0 0–0 13.Ne5 Rc8 14.c4=) 9...Ne4 10.c3 Bd6 11.Ne4 de4 12.Be4 Be5 13.de5 Bb5 14.Bb7+/–; A3) 8...a6 9.c3 (9.ba6 ba6 10.Ne5 0–0 11.0–0 Bb7 12.a3 Bd6 13.Qf3 Rb8 14.Rab1+=) 9...Bd6 10.ba6 ba6 11.Ba3 Ba3 12.Qa4 Bd7 13.Qa3 Bb5 14.c4+=; B) 8.c3 B1) 8...Bd6 9.0–0 (9.Ba3 0–0 10.Bd6 Nd6 11.0–0 Bd7 12.a4 c6 13.Qe2 Qa5 14.Ra2=) 9...Qe7 10.Nbd2 Bd7 11.a4 a6 12.ba6 ba6 13.c4 Bb4 14.Qc2+/–; B2) 8...Be7 9.Nbd2 (9.Ne5 0–0 10.0–0 Nd7 11.Ba3 Ne5 12.Be7 Qe7 13.de5 Qg5 14.Qf3=; 9.Ba3 Nd6 10.Ne5 0–0 11.0–0 Bd7 12.Qe2 c6 13.bc6 Bc6 14.Nc6=; 9.0–0 0–0 10.Nbd2 Qe8 11.Ne5 a6 12.ba6 b6 13.Qf3 Ba6 14.c4=) 9...0–0 10.0–0 Bd7 11.Ne5 Qe8 12.a4 c6 13.Qe2 Nd6 14.c4+=.

7.Bd3 Bd6 A) 8.Ba3 Ba3 9.Na3 Qd6 10.Nb1 a6 11.ba6 ba6 12.Nbd2 0–0 13.Rb1 Bd7 14.c4+=; B) 8.Ne5 B1) 8...Ne4 9.Qf3 (9.0–0 Qg5 10.Qf3 f6 11.Nc4 Nh4 12.Nd6 cd613.Qh3 e5 14.f4–+; 9.Nc3 Nc3 10.Bc3 0–0 11.0–0 f612.Nf3 Bd7 13.Rb1 Re8 14.e4+=; 9.Be4 de4 10.Nc3 Qh411.Nc4 Bb4 12.a3 Bc3 13.Bc3 Qg5 14.Rg1+=) 9...Ng510.Qe2 0–0 11.0–0 Qe7 12.c4 f6 13.Nf3 dc4 14.Bc4+=; B2) 8...Nd7 9.Nd2 (9.0–0 a6 10.ba6 ba6 11.c4 Rb8 12.Qc2 Be513.de5 dc4 14.Bc4=) 9...0–0 10.0–0 Qf6 11.Ng4 Qh412.c4 Bb4 13.h3 c6 14.Nf3+=; B3) 8...a6 9.ba6 ba6 10.0–0 0–0 11.Ba3 Ne4 12.c4 Ba3 13.Na3 f614.Nc6+=; B4) 8...Qe7 9.a4 (9.0–0 a6 10.ba6 ba6 11.c4 dc4 12.Nc4 Bb713.Nbd2 Nh6 14.e4+/–; 9.Nd2 0–0 10.c4 Rd8 11.0–0 Ne412.Be4 de4 13.Qe2 f6 14.Ng4+=; 9.c4 0–0 10.0–0 Ne411.Qc2 Nf6 12.c5 Be5 13.de5 Ng4 14.Nd2+/–) 9...0–010.0–0 Ne4 11.Be4 de4 12.Nc3 Be5 13.de5 Rd8 14.Qg4+/–; B5) 8...0–0 9.Ba3 (9.c4 a6 10.ba6 dc4 11.ab7 Bb7 12.Bf5 ef513.0–0 Re8 14.a4=; 9.0–0 Ne4 10.Be4 de4 11.Nc3 Qh412.g3 Qe7 13.Qg4 f6 14.Nc4+=; 9.Qf3 Nd7 10.Bf5 ef511.0–0 c6 12.bc6 bc6 13.Nd7 Bd7 14.Ba3=; 9.Nd2 Nd710.0–0 Qf6 11.Ndf3 Nh4 12.Nh4 Qh4 13.f4 f6 14.Nf3=)9...Ne4 10.0–0 Qe7 11.Bd6 cd6 12.Nf3 Nh4 13.c4 Nf3 14.Qf3+=; C) 8.0–0 C1) 8...Qe7 9.Ne5 (9.Nbd2 Bd7 10.Qe2 c6 11.a4 0–0 12.e4 de413.Ne4 Nd5 14.Nd6+=; 9.a4 a6 10.ba6 ba6 11.Ba3 Rb812.Bd6 Qd6 13.Nbd2 0–0 14.c4+=; 9.c4 dc4 10.Bc4 0–011.Qc2 Ng4 12.e4 Nh4 13.e5 Nf3 14.gf3+=; 9.Nc3 0–010.e4 de4 11.Ne4 Ne4 12.Be4 a6 13.Re1 Qf6 14.a4+=)9...a6 10.ba6 ba6 11.c4 dc4 12.Nc4 Bb7 13.Nbd2 Nh4 14.e4+/–; C2) 8...a6 9.ba6 (9.a4 0–0 10.ba6 ba6 11.Ba3 Rb8 12.Ne5 Ba313.Na3 Qd6 14.Bf5=; 9.Nc3 0–0 10.Ne5 ab5 11.Nb5 Be712.c4 dc4 13.Bc4 Nd6 14.Bd3=) 9...ba6 10.Ba3 Rb811.Bd6 Qd6 12.Nbd2 0–0 13.c4 Rb2 14.Qc1+=; C3) 8...0–0 9.Ba3 (9.Ne5 Ne4 10.Be4 de4 11.Nc3 Qh4 12.g3 Qe713.Qg4 f6 14.Nc4+=; 9.Qe2 a6 10.ba6 ba6 11.Ba3 Ba312.Na3 Qd6 13.Bf5 Qa3 14.Bd3=) 9...a6 10.Bd6 Qd611.ba6 ba6 12.Nbd2 Rb8 13.c4 Rb2 14.Qc1+=.

7.Bd3 Nd6

8.0–0 a6 9.ba6 (9.a4 ab5 10.ab5 Ra1 11.Ba1 Bd7 12.Nc3 Be7 13.Ne5 0–0 14.Qf3=) 9...b5 10.Ne5 Ba6 11.Ba3 Nfe4 12.Qe2 c5 13.dc5 Nc4 14.Nc4 +/–.

8.0–0 Bd7 9.Nc3 (9.a4 Be7 10.Ne5 0–0 11.Nd2 c6 12.Ba3 Qe8 13.Qf3 cb5 14.Nd7+=; 9.Qe2 Be7 10.Ne5 0–0 11.a4 c6 12.Ba3 Qc7 13.Nd2 Rfc8 14.c4+=; 9.Na3 Nde4 10.c4 dc4 11.Bc4 c6 12.bc6 Bc6 13.Ne5 Qa5 14.Qd3+=) 9...Be7 (9...Nfe4 10.Rb1 Qf6 11.Ne5 0–0–0 12.a4 Nc3 13.Bc3 h5 14.a5+=) 10.a4 (10.Ne5 0–0 11.a4 Nfe4 12.Qh5 Nf6 13.Qf3 c6 14.Ba3+=) 10...Nde4 (10...0–0 11.Ne5 c6 12.Ba3 Qa5 13.Rb1 Rfc8 14.Qf3+=) 11.h3 (11.Ne5 0–0 12.a5 c6 13.a6 Nc3 14.Bc3+=) 11...c6 (11...Bb4 12.Ne2 a6 13.ba6 ba6 14.c4=) 12.Qe1 (12.Ne5 0–0 13.Ne4 de4 14.Bc4+=) 12...Bb4 13.bc6 Bc6 (13...bc6 14.a5+=) 14.a5 Bd7 (worse is 14...Ba5 15.Ra5 Qa5 16.Ne4 Qe1 17.Nf6 (17.Ne1? de4 18.Be2 b5–+) 17...gf6 18.Re1+/–) 15.a6 ba6 16.Ra6 (worse is 16.Ba6 Rb8 17.Ra3 Nc3 18.Rc3 Ne4–+) 16...Qc7?? (better is 16...Rc8 17.Ne4 Be1 18.Nd6 Kf8 19.Re1 Rc7=) 17.Nb5+– 0–0 (17...Qc4 18.Bc4 Be1 19.Nc7 Kd8 20.Na8 Bf2 21.Rf2 Nf2+–) 18.Nc7 Be1 19.Re1 Rab8 20.Ba3 Rfc8 21.Ra7 Rb6 22.Na6 g6 23.Nb4 Nc3 24.Nd2 (better is 24.Ne5!? Be8+–) 24...Bb5 25.Nb1 Bd3 26.cd3 (26.Nd3?! Rb1 27.Rb1 Nb1+–) 26...Nb5 27.Ra4 Rcb8 28.Nc2 Nd7 29.Kf1 Kg7 30.Nd2 (30.Bc5!? R6b7 31.Rc1 e5+–) 30...Rc8 31.Nb4 (better is 31.Na1+–) 31...Na3+/– 32.Nd5 (worse is 32.Ra3 Rb4 33.Nf3 Rb7+/–) 32...ed5 33.Ra3 Rb2 34.Ke2 Rcc2 35.Rd1 Nb8? (better is 35...h5+–) 36.Ke1?? (better is 36.Ra5+–) 36...Nc6+= 37.f3 Nb4 38.e4 Na2 39.ed5 Nc3 40.Rc3 Rc3 41.d6 Rd3 42.Ne4? (better is 42.d7 Rb8 43.Ne4 Rd1 44.Kd1+=) 42...Rd1–+ 43.Kd1 Rb4 44.d5 (44.Kc2!? Rd4 45.Kc3–+) 44...Rd4 45.Ke2 Rd5 46.Ke3 f5 47.Nc3 Rd6 48.Kf4 Kf6 49.g4?! (49.Ke3 Ke6–+) 49...g5 50.Kg3 (50.Ke3 Ke5 51.gf5 Rh6–+) 50...f4 51.Kf2 Rd2 (better is 51...Rd4 52.Kf1 Rc4–+) 52.Ne2 (52.Kf1 Rd4 53.Ke2–+) 52...Ke5 53.Ke1 Re2 54.Ke2 Kd4 55.Kd2 h6 56.Ke2 Kc3 57.Kf1 Kd3 0–1. Nestorenko,Dmitry – Zhurba,Valery, New Years All–Ukrainian Open, Poltava .Ukraine, 2009

8.0–0 Nde4 9.a4 (9.c4 dc4 10.Bc4 a6 11.ba6 ba6 12.Ne5 Nd7 13.Bd3 Bb7 14.Qa4+=; 9.Nbd2 Be7 10.Ne5 Nd2 11.Qd2 Ne4 12.Qe2 0–0 13.c4 f6 14.Nf3+=; 9.Ne5 Bd7 10.a4 a6 11.ba6 ba6 12.c4 dc4 13.Bc4 Bb4 14.Qc2+/–) 9...Bd6 10.Ne5 c5 11.f3 c4 12.Be2 c3 13.Ba3 Ba3 14.Ra3 +–.

8.0–0 Nfe4 9.Nbd2 (9.Ne5 Qg5 10.Nd2 f6 11.Nef3 Qg4 12.a4 Be7 13.c4 dc4 14.Nc4+=; 9.a4 Be7 10.Nbd2 a6 11.ba6 ba6 12.Ne5 Bb7 13.Rb1 Rb8 14.Nb3+=; 9.Na3 Bd7 10.Ne5 Be7 11.c4 dc4 12.Nac4 Bb5 13.Nd6 Nd6 14.Nf7+=; 9.Ba3 Bd7 10.Qe2 Be7 11.Ne5 c6 12.bc6 Bc6 13.f3 Nf6 14.Nc6+=) 9...Be7 10.a4 0–0 11.c4 Nd2 12.Nd2 dc4 13.Nc4 Nc4 14.Bc4 +=.

8.0–0 Be7 9.Qe2 (9.Nbd2 0–0 10.a4 a6 11.ba6 ba6 12.Ne5 Bb7 13.Rb1 Nfe4 14.Qh5=; 9.a4 a6 10.Ne5 ab5 11.ab5 Ra1 12.Ba1 0–0 13.Nc3 Nfe4 14.f3=; 9.Ne5 Nd7 10.Nd2 0–0 11.Qh5 f5 12.Ndf3 Rf6 13.Qg5 Ne4 14.Qf4=; 9.Nc3 0–0 10.Ne5 Nfe4 11.Qh5 f6 12.Nf3 Qe8 13.Qe8 Re8 14.Rfb1=; 9.Ba3 Bd7 10.Nc3 Rc8 11.Ne5 0–0 12.Qf3 c6 13.bc6 Bc6 14.Rfb1=) 9...0–0 10.Ne5 Nfe4 11.f3 f6 12.Ng4 Ng5 13.Nd2 Bd7 14.a4 +=.

8.Nbd2 A) 8...Be7 9.Ne5 (9.Qe2 Nfe4 10.0–0 0–0 11.a4 a6 12.ba6 ba6 13.Rfb1 Bb7 14.Nb3+=; 9.a4 a6 10.ba6 ba6 11.0–0 Rb8 12.Rb1 0–0 13.Ne5 Bb7 14.Qe2+=; 9.0–0 0–0 10.a4 a6 11.ba6 ba6 12.Ne5 Bb7 13.Rb1 Nfe4 14.Qh5=; 9.Ba3 Bd7 10.Rb1 c6 11.bc6 Bc6 12.Ne5 0–0 13.Nc6 bc6 14.0–0=) 9...Bd7 10.a4 c6 11.Qe2 cb5 12.ab5 0–0 13.Ba3 Nde4 14.Be4+=; B) 8...Nfe4 9.a4 (9.0–0 Be7 10.a4 a6 11.ba6 ba6 12.Ne5 Bb7 13.Rb1 Rb8 14.Nb3+=; 9.Rb1 Bd7 10.Qe2 Qf6 11.0–0 Be7 12.a4 0–0 13.Ne5 Rad8 14.Nb3+=; 9.Qe2 Be7 10.0–0 0–0 11.a4 a6 12.ba6 ba6 13.Rfb1 Bb7 14.Nb3+=) 9...Be7 10.0–0 0–0 11.c4 Nd2 12.Nd2 dc4 13.Nc4 Nc4 14.Bc4+=; C) 8...Bd7 9.Qe2 (9.a4 c6 10.bc6 Bc6 11.0–0 Rc8 12.Ne5 Qc7 13.a5 Nde4 14.Nc6+=) 9...Nfe4 10.0–0 Qf6 11.a4 Nd2 12.Nd2 Be7 13.Rfc1 Qh4 14.c4+=; D) 8...Nde4 9.c4 (9.0–0 Be7 10.c4 0–0 11.Ne5 Nd2 12.Qd2 dc4 13.Bc4 Nd5 14.e4+=) 9...Nd2 10.Qd2 Ne4 11.Qa5 Bd7 12.Ne5 Bd6 13.Nd7 Qd7 14.0–0+=; E) 8...a6 9.ba6 ba6 10.Ne5 Bb7 11.0–0 Rb8 12.c4 Nc4 13.Ndc4 dc4 14.Qa4+=.

8.Ne5 A) 8...Nd7 9.Nd2 (9.0–0 Be7 10.Nd2 0–0 11.a4 Qe8 12.Qh5 f5 13.Qe8 Re8 14.Nd7+=) 9...Be7 10.0–0 0–0 11.a4 Nf5 12.e4 Nd6 13.Re1 Nf6 14.ed5+=; B) 8...Be7 9.Nc3 (9.a4 0–0 10.0–0 Nfe4 11.f3 f6 12.Ng4 Ng5 13.Nd2 Nf5 14.c4+=; 9.0–0 0–0 10.Nc3 Nfe4 11.Qh5 f6 12.Nf3 Qd7 13.Rab1 Rb8 14.a4=; 9.Qf3 Bd7 10.Nc3 0–0 11.0–0 Nfe4 12.a4 f5 13.Qh5 c6 14.Rfb1=; 9.Qe2 Bd7 10.0–0 0–0 11.a4 c6 12.Nd2 Rc8 13.Ba3 Re8 14.Rfc1+=; 9.Nd2 Bd7 10.a4 c6 11.Qe2 Rc8 12.0–0 0–0 13.Ba3 Nfe4 14.Be4+=) 9...Nfe4 10.0–0 0–0 11.Qh5 Nf6 12.Qf3 Nfe8 13.Ba3 Bd7 14.Bc5+=; C) 8...Nfe4 9.0–0 (9.Nc3 Qh4 10.0–0 f6 11.Nf3 Qh5 12.Be2 Qf5 13.Ne4 de4 14.Nd2+=; 9.a4 Qg5 10.0–0 f6 11.Nf3 Qg6 12.Nfd2 f5 13.c4 Be7 14.Qc2+=; 9.Ba3 Bd7 10.Qf3 c6 11.Bd6 Nd6 12.bc6 Qa5 13.c3 Bc6 14.Nc6=; 9.Na3 Qg5 10.0–0 f6 11.Nf3 Qg4 12.c4 dc4 13.Nc4 Nc4 14.Bc4+=) 9...Qg5 10.Nd2 f6 11.Nef3 Qg4 12.a4 Be7 13.c4 dc4 14.Nc4+=; D) 8...Nde4 9.0–0 (9.f3 Nd6 10.0–0 Be7 11.a4 0–0 12.Nd2 Nd7 13.e4 f6 14.Nd7+=) 9...Be7 10.c4 dc4 11.Bc4 0–0 12.Qc2 Nd6 13.Bd3 Bd7 14.Nc3+=; E) 8...Bd7 9.Qe2 (9.a4 Be7 10.0–0 0–0 11.Nd2 c6 12.Ba3 Qe8 13.Qf3 cb5 14.Nd7+=; 9.Nc3 Nf5 10.0–0 Bb4 11.a4 0–0 12.Nb1 Be7 13.Ba3 a6 14.ba6+=) 9...Be7 10.0–0 0–0 11.a4 c6 12.Nd2 cb5 13.ab5 Nfe4 14.Be4+=.

5.Nf3 e6

6.a4 Be7 (6...Bc5 7.Bd3=) 7.Be2 (7.Bd3 d5=) 7...0–0 8.0–0 b6 (8...d5 9.h3=) 9.c4 (9.Nc3 Bb4=) 9...Bb7 (9...a6 10.Qc2 ab5 11.e4+=) 10.d3 d5 11.Nbd2 Re8 (11...Qd6 12.cd5 ed5 13.Qc2+=) 12.Rc1 (12.cd5 ed5 (12...Bd5? 13.e4+–; 12...Qd5? 13.e4 Qd8 14.ef5+–; worse 12...Nd5 13.e4+–) 13.Qc2 Bb4+=) 12...dc4 (12...Qc8 13.Qc2+=) 13.Nc4+= Rc8 (13...a6!?+=) 14.Nce5 (14.e4 Nd6+–) 14...Qd6 (14...Bc5!?+–) 15.Nc6+– Bc6 (15...Nd7!? 16.e4 Nh6 17.Rc4 (17.Ne7?! Qe7 18.Nd4 Red8+–) 17...Bc6 18.Rc6+– (18.bc6?! Nf8+–)) 16.Rc6 (16.bc6?! Ng4+=) 16...Qb4 17.Qc2 Bd8? (better 17...Nh4+–) 18.e4 Ne7 (18...Nh6 19.Ne5 Rf8+–) 19.Bc3 (better 19.Rc4 Qd6 20.e5+–) 19...Nc6 20.Bb4 Nb4 21.Qc4 c5 22.Rb1 Be7 23.Rc1 Red8 24.Nd2 (better 24.g3+–) 24...Rd6?? (better 24...Rd7+–) 25.e5+– Rd4 (25...Rdd8 26.ef6 Bf6+–) 26.Qd4!! cd4 (26...Rd8 27.Qc4 Nfd5 28.Rd1+–) 27.Rc8 Bf8 28.ef6 gf6 (28...Nd5 29.Ra8 gf6 30.Ra7+–) 29.Ra8 1–0. Chaparro Grande,F (1675) – Sanabria Taskila,Jenny M, 34th Torneo Internacional El Corte Ingl, 2013.

6.c4 Bc5 7.d4 Bb4 8.Nbd2 0–0 9.Bd3 d5 10.0–0 dc4 11.Nc4 Qd5 12.a3 Be7 13.Nce5 Ne4 14.Qc2 Ned6 15.e4 Ne4 16.Be4 Qb5 17.g4 f6 18.gf5 fe5 19.fe6 g6 20.de5 Qb6 21.Rae1 c5 22.Ba1 Qe6 23.Re3 c4 24.Nd4 Qe5 25.Qc4 Rf7 26.Bd5 Qg5 27.Kh1 Qf6 28.Nc2 b5 29.Bf6 bc4 30.Re7 Bb7 31.Rb7 Raf8 32.Rf7 Rf7 33.Rb1 h5 34.Rb8 Kh7 35.Rh8# 1–0. Bonetti,Shane – KNEiTER, ICC, 2002.

6.c4 Bc5 7.d4 Bb4 8.Nbd2 0–0 9.Bd3 d5 10.0–0 dc4 11.Nc4 Qd5 12.a3 Be7 13.Nce5 Ne4 14.Qc2 Ned6 15.e4 Ne4 16.Be4 Qb5 17.g4 f6 18.gf5 fe5 19.fe6 g6 20.Ne5 Be6 21.Bg6 h6 22.Bh7 Kh8 23.Ng6 Kg7 24.d5 Bf6 25.Nf8 Bd5 26.Qc7 Bf7 27.Ne6 Kh7 28.Qf7 Kh8 29.Bf6# 1–0. Bonetti,Shane – KNEiTER (1730), ICC, 2002.

6.Bd3 d5+=.

6.Be2 Be7 7.0–0 0–0 8.d3 d5 9.Nbd2 Bd7 (9...Nd6 10.c4=) 10.a4 c6 11.c4 c5 12.Nb3 White prepares the advance a5 12...b6 (12...a6 13.Ne5+=) 13.a5+– Bd6? (13...Qc8 14.Qc2+–) 14.Qc2 (14.e4 de4 15.de4 Ne4+–) 14...e5 (14...Ng4!?+–) 15.Be5 Be5 16.Ne5 Re8 17.Nd7 Qd7 18.ab6 ab6 19.Ra8 Ra8 20.Bf3 Re8 21.cd5 Nd5 22.e4 (22.Bg4 Rd8 23.e4 Nd4 24.Nd4 Qg4+–) 22...Nd4 23.ed5?? (better 23.Nd4 Nb4 24.Qc4 Qd4 25.Qd4 cd4 26.Be2+=) 23...Nc2–+ 24.Rc1 (24.Nd2 Nd4–+) 24...Nd4 (better 24...Qb5 25.Nd2 Qd3 26.Nf1–+) 25.Nd4 cd4 26.Rc6 (26.g4 h5 27.h3 Qb5 28.Be4–+) 26…Re1 0–1. avz81 (1725) – KINGTRAPPED (1705), lichess.org, 2018.

4.d4 d5

5.Bd3 Nd6 6.Nc3 (6.Ba3=) 6...Qd7 (6...Nf6!?=) 7.Nf3 (better is 7.Nd5 e6 8.Nc3+/–) 7...b6? (better is 7...Nf6!?+=) 8.Nd5+– Qg4?? (better is 8...Bb7 9.Ne5 Qc8+–) 9.Nc7 Kd8 10.Na8 Qg2 (10...Bb7 11.0–0 Ba8+–) 11.Rg1 Qh3 12.Rg3 Qh5 13.e4 (13.Rg5 Qh6 14.e4 Bb7+–) 13...Bg4 (13...Bb7 14.e5 Nf5 15.Ng5 Ng3 16.Qh5 Nh5 17.Nf7 Kd7 18.Nh8+–) 14.c4 (14.h3 Bc8 15.Ne5 Qd1 16.Kd1 Bb7 17.Nc6 Kd7+–) 14...e6 (14...f5 15.h3 Bh3 16.e5+–) 15.h3 Bh3 (15...Bf3 16.Qf3 Qf3 17.Rf3+–) 16.Ng5 Bg4 (16...Qd1 17.Kd1 Bg4 18.Rg4+–) 17.Qg4 Qh1 (17...Qg4 18.Rg4 Nh6 19.Rh4+–) 18.Rg1 Qh2 19.Bf4 Qh6 20.Bd6 Bd6 21.Nf7 (21.Nf7 Ke7 22.Nh6 Nh6 23.Qg7 Nf7 24.e5 Bb4 25.Kd1+–) 1–0. GGeorge – Dennis, itsyourturn.com, 2000.

5.Nf3 Nd6 =.

5.Nf3 Nf6 6.Nbd2 Nd6 7.a4 g6 (7...Bg4 8.Bd3=) 8.c4+= dc4 9.Nc4 Bg7 10.Bb2 0–0 11.Rc1 a6 12.ba6 b6 The passed pawn on a6 quickly leads to threats 13.Nfe5 Ba6 14.Nc6 Qe8 Black is in command 15.Nd6 ed6 16.Ba6 Ra6 17.0–0 Qe4 18.Nb4 Ra7 19.Qb3 c5 20.Nd3 Qa8 Exerts pressure on the isolated pawn 21.a5 Ra5 22.Qb6 Ra6 23.Qb3 Rb8 24.Qc2 Ra2 25.Rb1 cd4 26.Nc1 Qa4 27.Qe2 d3 28.Nd3? (better is 28.Bf6!? de2 29.Rb8 Bf8 30.Ne2–/+) 28...Nd7–+ 29.Qd2 Nc5 30.Nc5 dc5 31.Bc3? (better is 31.Bf6 Rd2 32.Rb8 Bf8 33.Be7–+) 31...Rb1 (31...Rd2 32.Rb8 Bf8 33.Bd2+=) 32.Qd8 Bf8 33.Rb1 Qc2 (33...Qc2 34.Rf1 Qc3–+) 0–1. Mothes,Rainer – Deneuville,Christian, corr SOK–98–131, 1999.

5.Nf3 Nf6 6.Nbd2 e6 7.c4 Bb4 8.Qb3 Bd2 (8...Ba5 9.Bd3=) 9.Bd2+= 0–0 10.Bd3 Ne7 (10...dc4 11.Qc4 Nd6 12.Qc2+=) 11.0–0+/– a5 12.c5 h6 (12...Ne4 13.Qc2+/–) 13.a4 c6 (13...Ne4 14.Qc2+/–) 14.b6 Re8 15.Ne5 Nf5 16.Qc2 Nd7 17.Nd7 Bd7 18.Bc3 Qg5 19.Qd2 Nh4 The mate threat is Qxg2 20.f4 Qg4 21.Ra2 Nf5 22.Rf3 f6 23.h3 White launches an attack 23...Qh5 24.g4 Nh4 25.Rf1 (25.gh5 Nf3 26.Kf1 Nd2 27.Rd2 Red8–/+) 25...Qf7 26.Qf2 Ng6 27.Qe1 Re7 28.Re2 Qe8 29.Bc2 (29.g5 e5 30.gf6 ed4 31.Bd4 Bh3 32.fe7 Bf1 33.Qf1 Ne7+–) 29...e5 30.de5 fe5 31.f5 Nf8 32.e4 d4 33.Ba5 Nh7 (33...Qf7 34.Qb4 Qf6 35.Bb3 Kh8 36.Rd1+/–) 34.Bb3 Kh8 35.Bd2 Qf8 36.Qh4 Qf6 37.Qg3 Be8 (37...Ree8 38.Qd3+/–) 38.h4+– White prepares g5 38...Qf8 39.g5 h5? (better is 39...Bf7+–) 40.f6! gf6 (40...Qf6 41.gf6) 41.gf6 Nf6 (41...Rf7 42.Bf7 Bf7 43.Qe5 Ra4+–) 42.Rf6! Qf6 Theme: Deflection from g8 (42...Bf7+–) 43.Qg8 1–0. Lohr – Frenzel,Lothar, corr SOK–90–56, 1990.

4.e4 Nd4

5.Bb2 Ne6 6.Nc3+= a5 (6...d6 7.Nf3+=) 7.Nf3 b6 (7...Nf4 8.d4+=) 8.Bc4 (8.Ne5 g6+/–) 8...c6 (8...Nf4 9.Nd5 Ng6 10.0–0+/–) 9.Be6 (9.bc6 dc6 10.Ne5 Qd4+/–) 9...de6 10.bc6 f6 (10...Qd6!?+/–) 11.Nb5+– e5?? (11...Ba6 12.c4+–) 12.0–0 (better is 12.Ne5 fe5 13.Qh5 g6 14.Qe5+–) 12...Bg4 (12...Ba6 13.c4 Rc8 14.Qa4+–) 13.h3 Bf3 14.Qf3 (14.gf3?! Qc8+=) 14...Qd2?? (better is 14...Rc8 15.c7 Qd7+–) 15.Nc7 (15.Nc7 Kf7 16.Qb3 e6 17.Qe6 Kg6 18.Na8+–) 1–0. Wall,Bill – Vestigial, internet, 1999.

5.c3 Nb5? 6.Bb5+– c6 7.Be2 Qc7 8.d4 Nf6 9.e5 Nd5 10.Nf3 Nc3 (10...d6+–) 11.Nc3 Qa5 12.Bd2 c5 (12...d5 13.0–0+–) 13.Rc1 cd4 (13...Qd8 14.dc5 e6+–) 14.Nb5 Qb5 15.Bb5 a6 16.Qc2 ab5 (16...f6 17.e6 Kd8 18.Qc7 Ke8 19.Qc8 Rc8 20.Rc8) 17.Qc8! Rc8 18.Rc8# 1–0. market (1920) – noidea, GameColony.com, 2002.

5.c3 e5? 6.cd4+– ed4 7.Nf3 Qf6 (7...d5 8.e5+–) 8.Bb2 Bb4 (8...Bc5 9.Qc2 d6 10.Qd3+–) 9.Bd4 Qf4 (9...Qg6+–) 10.Bg7 Qe4 (11.Be2 a6+–) +–. Woschkat,Karl_Heinz – Lausch,Axel, remoteschach.de, 2003.

5.c4 e5 6.Nf3 Nf3 7.Qf3 Nf6 (7...Bc5 8.Nc3=) 8.Bb2 d6 (8...Qe7 9.Nc3=) 9.d4 Bg4 (9...d5 10.Qg3 (worse is 10.de5 Ne4 11.Bd3 Bb4 12.Kf1 Bc5 13.Be4 de4 14.Qe4 Be6–/+; 10.ed5?! Bb4 11.Nd2 Bd2 12.Kd2 e4=) 10...Ne4 11.Qe5 Be6 12.c5=) 10.Qg3 ed4 11.Bd4 Be6 (11...Qe7 12.f3 Be6 13.Nc3+=) 12.Bd3 Ng4 13.0–0 f6 (13...h5!?+=) 14.f4+/– c5 (better is 14...Nh6+/–) 15.bc6+– bc6 (15...Nh6 16.cb7 Rb8 17.Ba7 Rb7 18.Bd4+–) 16.f5 Nh2 17.Kh2 (17.fe6?! Nf1 18.Bf1 Qe7+/–) 17...Bf7 18.Nc3 d5 (18...a6+–) 19.cd5 Bd6 (19...Be7 20.Ne2 0–0 21.Be3+–) 20.e5 fe5 21.Be5 Be5 22.Qe5 Kf8 (22...Qe7 23.Rae1 Qe5 24.Re5 Kd8 25.dc6+–) 23.f6 g6 24.dc6 Qd3 (24...Rc8 25.Rad1 Qc7 26.Qc7 Rc7+–) 25.Rad1 Qd7 26.cd7 1–0. Trkn – guest3776, ICC, 2004.

5.Nf3 e5 6.Bb2 Bc5 7.Bc4 Nf3 8.Qf3 Qe7 9.0–0 (9.Qg3 Nf6 10.Qe5 Qe5 (worse 10...Ne4 11.Bf7 Kd8 12.Qe7 Ke7 13.Bg7+–) 11.Be5 Ne4+=) 9...Nf6 10.Qg3 0–0 (10...d6 11.Nc3= (worse 11.Qg7 Rg8 12.Qh6 Be6 13.Be6 Qe6–/+)) 11.Qe5+= Re8? (better 11...Qe5!? 12.Be5 Ne4 13.Bc7 Re8+=) 12.Qe7+– Re7 (12...Be7!? 13.e5 Ng4 14.h3+–) 13.e5 Ng4 (13...Nh5 14.d4 Bb6 15.a4+–) 14.d4 Bb6 15.h3 (15.a4 Ba5+–) 15...Nh6 16.a4 (16.Nd2 d6+–) 16...c6 (16...Nf5 17.Rd1 c6 18.d5+–) 17.g4 cb5 (17...Bc7 18.Ba3 Re8 19.Nd2+–) 18.ab5 a6 (18...a5 19.ba6! ba6 20.Nd2+–) 19.Nd2 d5 (19...Bc7 20.Ne4+–) 20.ed6 Rd7 (20...Re8 21.ba6 ba6 22.Bc3+–) 21.Rfe1 Kf8 22.Bd5 Bc7 (22...Bd8 23.Nc4 a5+–) 23.dc7 Rd5 (23...g5 24.Re5 f6 25.Ba3 Kg7 26.Re7 Re7 27.Be7 Ng8+–) 24.Ba3 (24.Ba3 Rc5 25.Bc5 Kg8 26.Re8) 1–0. DEFFM – GuestHLGP, freechess.org, 2019.

5.Nf3 Ne6 6.Bc4 d6 7.0–0 Nf6 8.Nc3 a6 (8...Ne4 9.Ne4 d5 10.Ne5 dc4 11.Bb2+/– (11.Nc4? Qd4–+)) 9.ba6+/– ba6 10.d4 Bb7 11.Qe2 g6 12.Rb1 Rb8 13.Ng5 Ng5 14.Bg5 Bg7 15.e5 Nh5 16.g4 h6 (16...f6!? 17.Bd2 fe5 18.de5 Be5 19.gh5 Qd7+–) 17.Bd2 Rg8 (17...c5 18.d5 Be5 19.gh5 e6 20.Ba6 Qh4+–) 18.Rb7 (worse is 18.gh5 e6 19.Ba6 Ba6 20.Rb8 Qb8 21.Qa6 gh5 22.Qc6 Kd8+–) 18...Rb7 19.Qf3 e6 (19...Nf4 20.Qc6 (20.Bf4?! Rb4 21.Qc6 Kf8+–; 20.Qf4?! e6+–) 20...Qd7 21.Bf7 Kd8 22.Qd7 Kd7 23.Bg8 (worse is 23.Bf4 Rf8 24.e6 Kc8+–) 23...de5 24.Na4+–) 20.Qc6 (20.gh5?! Rb8 21.hg6 Qd7+–) 20...Qd7 21.Qb7 de5 22.Ba6 (worse is 22.gh5 ed4 23.Ba6 Ke7+–) 22...Ke7 23.Ne4 f5 (23...c5 24.Qb6 Rc8 25.Bc8 Qc8 26.Qa7 Qd7 27.Qc5 Ke8+–) 24.Bb4 Kf7 25.Nd6! Qd6 (25...cd6 26.Qd7 Double attack) 26.Bd6 fg4 27.Qc7 Kf6 28.f4 e4 (28...g3 29.Bd3 e4 30.Be4 gh2 31.Kh2 Nf4 32.Qe7) 29.Be7 Kf5 30.Qc5 e5 31.Bc8 Rc8 32.Qc8 1–0. Pcmvr – Jule, playchess.de, 2004.

5.Nf3 Ne6 6.Be2 d6 (6...d5 7.ed5 Nf4 8.0–0 Qd5 9.d4 Ne2 10.Qe2=) 7.Bb2 (7.d4 Nf6 8.Nc3 g6+=) 7...d5 (7...Nf6 8.e5 de5 9.Be5+=) 8.ed5+= Qd5 (8...Nf4 9.0–0+=) 9.0–0 (9.Be5 Bd7+=) 9...Bd7 (9...Nf4 10.Be5 Ne2 11.Qe2+=) 10.c4+– Qc5 (10...Qe4 11.Nc3 Qf5 12.Nd5+–) 11.d4 Qf5 12.Ne5 0–0–0? (better 12...Nf6+–) 13.Bg4+– (13.Nd7 Rd7 14.d5 Nf4+–) 13...Qf4 14.g3 (14.Nd7?! Kd7 15.g3 Qg5+–) 14...Qf6 15.Qa4 Kb8 (15...a6+–) 16.Nd7 Rd7 17.b6! cb6 (17...ab6 18.Qd7 Discovered attack (18.Qd7 Deflection); 17...cb6 18.Qd7 Discovered attack) 18.Qd7 a6 19.Nd2 h5 (19...Ng5 20.f4 Ne4 21.Ne4+–) 20.Bf3 Nh6 21.Qb7 1–0. DEFFM – GuestNDXN, freechess.org, 2018.

5.Nf3 Nf3 6.Qf3 e6 7.d4 +=.

5.Bb2 e5=

6.Nf3 Bc5 =.

6.Bd4 ed4

7.Nf3 Bc5 8.c3 d5 9.cd4 =.

7.Nf3 d5

8.Qe2 Bc5 =.

8.e5 Bc5 9.c3 Bg4 10.Be2 Bf3 11.Bf3 =.

8.e5 Qe7 9.Nd4 (9.c3!?=) 9...Qe5+= 10.Qe2 Bd6 11.Nc3 (11.c3 Nf6–/+) 11...Ne7 (11...Nf6 12.Qe5 Be5 13.Nf3–/+) 12.Nf3 (12.Qe5 Be5 13.Nf3 Bd6+=) 12...Qf6–/+ 13.Rb1 0–0 14.Qd1 (14.Qe3 Bf4 15.Qd4 Qd4 16.Nd4 Re8–/+) 14...Re8 15.Be2 d4 (15...Qg6!? 16.0–0 Bh3–/+) 16.Ne4+= Qg6 17.Nd6 cd6 (17...Qd6 18.0–0+=) 18.0–0= Nd5 (18...Bh3 19.Ne1 Be6 20.a3=) 19.Nd4 (19.Bd3!? Qg4 20.Re1=) 19...Nf4+= The mate threat is Qxg2 20.Bf3 Ne6?? (better is 20...Bh3 21.g3 Bf1 22.Kf1 Nd3 23.Bb7 Rab8=) 21.Re1+/– Bd7 (21...Qg5 22.Ne6 Re6 23.d4+/–) 22.Ne6 Re6 23.Re3 (23.Bb7 Re1 24.Qe1 Re8+/–) 23...Rae8 (23...Re3 24.de3 Rc8 25.c4+/–) 24.Rbb3 (24.Bb7 Re5+–) 24...Re5 (24...a6 25.ba6 ba6 26.Rb7+–) 25.Re5 (25.c4 Bc8+/–) 25...Re5+= 26.Bb7 (better is 26.d4 Re7 27.g3+/– (27.Bb7?! Qc2 28.Rb1 Qd1 29.Rd1 Bb5=)) 26...Bb5?? (better is 26...Qc2 27.Rb1 Qd1 28.Rd1 Rb5+=) 27.Rg3?? (better is 27.f4 Rc5 28.d4 Qc2 29.Qc2 Rc2 30.Rb5+–) 27...Bc4 (better is 27...Qc2! 28.Qa1 Qb2–+) 28.Rg6+– Be2 (28...hg6 29.a4 Ra5+–) 29.Rd6 (29.Rd6 Kf8 30.Qc1+–) 1–0. vik – freshys, internet, 2001.

8.e5 Bg4 9.Be2 Bf3 (9...Qe7 10.0–0+=) 10.Bf3= (10.gf3? Qg5 11.Bd3 Qe5 12.Qe2 Bd6–+) 10...Nh6 (10...Bc5 11.c4 dc3 12.Nc3+=) 11.0–0 (11.c4 dc3 (11...dc4? 12.Bb7 Rb8 13.Bc6 Ke7 14.Qa4+–) 12.Nc3 d4+/–) 11...Nf5 (11...c6 12.c4 dc3 13.bc6 bc6 14.Qa4+=) 12.d3 (12.c4 dc3 13.Nc3 Ne7+/–) 12...Qd7 (12...Bc5 13.c4 dc3 14.Nc3=) 13.a4 (13.c4 dc3 14.Nc3 c6+=) 13...a6 (13...Bb4 14.Qc1 Nh4 15.Qf4 Nf3 16.Qf3+=) 14.c4 ab5 15.cb5 Bb4 (15...Be7!?+=) 16.Qb3+/– c5?? (better is 16...Ba5 17.Bd5 c6 18.bc6 bc6+/–) 17.bc6+– bc6 (17...Qe7 18.cb7 Rb8 19.Qd5+–) 18.Qb4 Qa7 19.Rc1 Kd7 (19...Ne7+–) 20.Bg4 Ke6 (20...g6 21.Qd6 Ke8 22.Qc6 Kf8 23.Bf5 gf5+–) 21.Qd6 1–0. Trkn – War Lord, itsyourturn.com, 2000.

8.e5 Bg4 9.h3 Bf3 10.Qf3 =.

5.c3 Ne6

6.d4 b6 7.f4 c5 8.Nf3 Qc7 9.e5 d5 10.Be2 cd4 11.cd4 f6 12.0–0 g5 13.ef6 Nf6 14.fg5 Ng4 15.h3 h5 16.hg4 hg4 17.Ne5 Bg7 18.Bg4 Be5 19.de5 Qe5 20.Bh5 Kd8 21.Re1 Qa1 22.Qd5 Kc7 23.Bf4!! Nf4 24.Re7 (24.Re7 Bd7 25.Rd7 Kb8 26.Qb7#) 1–0. nordlicht – Bauernfaenger, mySchach.de, 2003.

6.d4 d5 7.ed5 Qd5 8.Nf3 Nf6 9.Be2 (9.Bd3 Bd7 10.c4 Qd6+=) 9...Qd8 (9...Qd6 10.0–0+=) 10.0–0 (10.Bc4 Nd5+=) 10...g6 11.Bc4 Bg7 12.Re1 (12.Ne5 0–0+=) 12...0–0 13.Ne5 Ne8 (13...a6 14.Qa4+=) 14.Qb3+/– Be5 15.de5 N8g7 (15...c5 16.Rd1 Qc7 17.Bh6+/–) 16.Bh6 (16.Rd1 Qe8+/–) 16...Nc5 (16...c6 17.Rd1 Qc7 18.bc6 bc6 19.Qb4+/–) 17.Qb4 (17.Qa3 Nce6+/–) 17...b6 18.Nd2 a5 19.Qb2 Nd3 20.Bd3 Qd3 21.e6 f6 22.Rad1 Rd8+= 23.Qa3 Nf5 24.Qa4 Be6 25.Re6 Nh6 26.Re7 Rd7 27.Rd7 Qd7 28.Nf1 Qe7+= 29.Ne3 Rd8 30.Qc4 Nf7+= 31.Nd5 Qe6 32.a4 Rd6 ½–½. Kopp,Jean_Raymond – Poulsen,Rene (2080), IECG, 2004.

6.d4 g5 7.d5+/– Nf4 8.g3 (8.h4 e6+/–) 8...Ng6 9.Bg5 h6 (9...Bg7 10.Nf3+/–) 10.Be3 e5 (10...Bg7 11.f4+/–) 11.de6+– fe6 (11...de6 12.Qd8 Kd8 13.Nf3+–) 12.Qh5 Kf7 (12...N8e7 13.Bd3 Rg8 14.e5+– (14.Bh6 Rh8–+)) 13.Nf3 White plans e5 (better is 13.e5+–) 13...Bg7? (13...d6 14.e5+–) 14.Bd3 (better is 14.Nh4 N8e7 15.f4+–) 14...Qf6 (14...N8e7+–) 15.e5 Qd8 16.Qg6 (better is 16.Bg6 Kf8 17.Nd4 d6 18.Qf3 Nf6 19.ef6 Qf6+–) 16...Kf8 17.Bd4 (17.Nbd2 Ne7 18.Qg4 d6+–) 17...Ne7 18.Qg4 Nf5 (18...d6 19.ed6 e5 20.de7 Qe7 21.Qe4 ed4 22.cd4+–) 19.Bf5 ef5 20.Qf5 Kg8 21.Nh4 (21.Nbd2 Qe8+–) 21...Rh7 (21...d6 22.Qg6 de5 23.Be5+–) 22.Qg6 Qg5 (22...d6 23.f4+–) 23.0–0 (better is 23.Qe8 Bf8 24.f4 Qg4+–) 23...d5 (23...Qg6 24.Ng6 d6 25.f4+–) 24.Qe8 Bf8 25.Bc5 Bh3 (25...Re7 26.Be7 Qe7 27.Qe7 Be7+–) 26.Qa8 Rf7 27.f4 (27.Re1 Qh4 28.e6 Re7 29.Qf8 Kf8 30.gh4 Ke8 31.Be7 Ke7+–) 27...Qg7 (27...Qe5 28.Rc1 (28.fe5?? Rf1) 28...Qe2 29.Na3+–) 28.e6 (28.Rf2!? Bd7+–) 28...Be6 29.Re1 (29.f5 Bd7 30.Ng6 Bb5+–) 29...Kh7 (29...Bd7 30.Bd4 Qg4 31.Qb7 Rf4 32.Qd5 Rf7 33.a4+–) 30.Bf8 Rf8 31.Qb7 Bg8 32.f5 d4 33.Ng6 (33.Qe4!? Rf6 34.Qd4 a6 35.ba6 Ra6+–) 33...Rf7 (33...Rf5 34.Re7 Rf7 35.Ne5 Re7 36.Qe4 Kh8 37.Ng6 Kh7 38.Ne7 Kh8 39.cd4+–) 34.Qe4 h5 35.cd4 Qf6 36.Ne7 h4 37.Ng8 (37.Qh4!? Qh4 38.gh4 Kg7+–) 37...Kg8 38.Nc3 (38.g4 Qg5+–) 38...Qf5 39.Qf5 Rf5 40.Re8 Rf8 41.Rf8 (41.Rf8 Kf8 42.gh4+–) 1–0. Trkn – Harry N, itsyourturn.com, 2001.

6.Nf3 d5 7.e5 Bd7 8.d4 g6 9.Qb3 c6 10.bc6 bc6 11.Bd3 Bg7 12.0–0 a6 13.Ng5 f6 14.Nh7 f5 15.Ng5 Ng5 16.Bg5 Bh6 17.Bd2 e6 18.c4 dc4 19.Bc4 Qh4 20.Be6 Bg7 21.Bd7 Ke7 22.Qb4 c5 23.Qc5 Kd8 24.Qb6 Kd7 25.e6 Ke7 26.Qc7 Ke6 27.Re1 Kf6 28.Qd6 Kf7 29.Qd5 Kf8 30.Qa8 Qd8 31.Qd8 Kf7 32.Qe8 Kf6 33.Qe6# 1–0. Betsy516 – Nero5, computer chess game, 2001.

6.d4 Nf6

7.d5 Nc5 8.e5 Ng8 +=.

7.e5 Nd5 8.c4 Nb6 9.c5 +=.

7.e5 Nd5 8.Qf3 c6 9.Bc4 Nec7 10.Nh3 d6 11.Ng5 (better is 11.bc6 bc6 12.ed6 Qd6 13.Ng5+=) 11...Be6 (better is 11...f6!? 12.e6 Ne6 (12...Nb5?? 13.Bb5 Qb6 14.Nf7+–) 13.bc6 bc6 14.Bd5 cd5 15.Qd5 Nc7 16.Qf7 Kd7=) 12.Ne6+/– fe6 13.bc6 bc6 14.0–0 Qd7 (14...g6 15.Be2+/–) 15.Be2 (15.Nd2 Rb8+/–) 15...de5 (better is 15...Rb8!?+/–) 16.de5+– g6 17.c4 Nb6 (17...Bg7 18.Qe4+–) 18.Rd1 Ncd5 (18...Qc8 19.Qc6 Nd7 20.Nc3+–) 19.Bb2 Bg7 (19...Rg8 20.cd5 ed5 21.Bd4+–) 20.cd5 Nd5 21.Nc3 (better is 21.Na3 Rd8+–) 21...0–0–0 (21...Rb8 22.Nd5 cd5+–) 22.Nd5 ed5 (22...cd5 23.Qb3 Qb7 24.Qa4+–) 23.e6! Qe8 (23...Qe6 24.Bg7) 24.Ba6 Kc7 25.Bg7 Rg8 26.Rab1 Rg7 (26...Qf8 27.Rb7 Kd6 28.Qa3 c5 29.Qg3 Ke6 30.Qe5 Kf7 31.Qf6 Ke8 32.Bb5 Rd7 33.Rb8) 27.Rb7 Kd6 (27...Kc8 28.Qb3 Rf7 29.Ra7) 28.Qf4 Kc5 (28...Ke6 29.Re1) 29.Rc1 1–0. b4_player – opponent, gamecolony.com, 2007.

7.e5 Nd5 8.Qf3 c6 9.Bc4 Nec7 10.Nh3 d6 11.Ng5 Be6 12.Ne6+/– fe6 13.bc6 bc6 14.0–0 de5 (14...g6 15.Bb3 de5 16.c4 ed4 17.cd5 ed5 18.Re1+–) 15.Qh5+– g6 16.Qe5 Rg8 17.Qe2 Bg7 18.Rd1 a5 19.Bg5 h5 (19...Rf8 20.Bh4+/–) 20.Qe4 Kf7 (20...Bf6 21.Bc1+–) 21.Qf3 Ke8 22.Bd3 Bf6 23.Bc1 e5 (23...Nb5 24.a4 Nd6 25.Re1+–) 24.c4 Nb4 25.de5 (better is 25.Be4 ed4 26.a3+– (26.Bc6?! Nc6 27.Qc6 Qd7=)) 25...Nd3?? (25...Be5 26.Be4 Ncd5 27.cd5 cd5+–) 26.Rd3 (26.ef6 Ne5 27.f7 Nf7 28.Qc6 Kf8 29.Rd8 Rd8+–) 26...Qc8 (26...Qd3 27.Qd3 Be5+–) 27.ef6 ef6 (27...Kf7 28.fe7 Qf5+–) 28.Qc6 Kf7 29.Rd7 Kf8 (29...Ke8 30.Rg7 Kd8 31.Qf6 Ke8 32.Qe7) 30.Qf6 Ke8 31.Qf7 1–0. Fritz 10 – NN, 2007.

7.e5 Nd5 8.Qf3 c6 9.Bc4 d6 10.bc6 bc6 11.Bd5 cd5 12.Qd5 +=.

7.e5 Ng8 8.Nf3+/– Nh6 (8...c6 9.bc6 bc6 10.Be3+/–) 9.d5 Nc5 10.e6 (10.Qd4 b6+/–) 10...Nf5 11.ef7 (11.Ba3 d6 12.ef7 Kf7+/–) 11...Kf7 12.g4 Nd6 13.Qd4 b6 14.Ba3 Nde4 (14...a6 15.Bc5 bc5 16.Qc5 ab5 17.Bb5+/–) 15.Nbd2 (15.Ne5 Kg8+/–) 15...Nd2 16.Qd2 d6 (16...Bb7 17.Bc5 bc5 18.Qf4 Ke8 19.Bc4+–) 17.Qf4 (17.Bc5 bc5 18.Ng5 Kg8+/–) 17...Kg8 18.Ng5 Threatening mate... how? 18...Qe8 19.Bc5 bc5 20.Bd3 (20.Qe4 g6+/–) 20...h6 (20...g6 21.Rb1+=) 21.Ne6+/– Be6 22.de6 g5 (22...Rb8 23.Bc4+/–) 23.Qf3 (23.Qe4 Bg7 24.Rc1 Rd8+/–) 23...Rb8 24.a4 (24.h4 Bg7 25.Rc1 Qf8+/–) 24...Bg7 25.Rc1 (25.Ra3 Qf8 26.Bf5 h5+/–) 25...Qf8 26.Bf5 Be5 27.h4 gh4 (27...Qf6!?+/–) 28.Rh4+– Rb6 29.Qd5 (29.Rh5 a6 30.g5 hg5 31.Rg5 Bg7+–) 29...a6 30.ba6 (30.Qc4 ab5 31.ab5 Qe8+/–) 30...Ra6 31.Qe4 Qa8 32.Qe3 Ra4 33.Rh6 Bf4?? (better is 33...Ra1 34.Rh8 Bh8 35.Ra1 Qa1 36.Kd2 Qa2 37.Bc2 Qd5 38.Kc1 Bg7+=) 34.Rh8+– Kh8 35.Qh3 Kg7 36.Qh7 Kf6 37.Bc2 Qf8 (37...Bd2 38.Kd2 Qd5 39.Bd3 Qg5 40.Ke2 Rf4+–) 38.Qf5 (38.Ba4?! Bc1 39.Bd7 Bh6 40.Qf5 Kg7 41.Qf8 Kf8+/–) 38...Kg7 39.Qg6 (39.Ba4?! Qf5 40.gf5 Bc1=) 39...Kh8 40.Qh7 (40.Ba4 Bc1 41.g5 Qg7 42.Qe8 Qg8+/–) 1–0. marekt – Quadro, internet, 2001.

4.e4 Nd6

5.Nc3 a6 6.ba6 ba6 7.e5 Nf5 (7...Nb5!?+/–) 8.Qf3+– Nd4? (better is 8...d5 9.Qd5 Qd5 10.Nd5 Ra7+/–) 9.Qa8 Nc2 10.Kd1 Na1 11.Bb2 d6 (11...Nh6 12.h3+–) 12.Nf3 Bg4 (12...de5 13.Ba1 Nh6 14.Ba6 Ba6 15.Qa6+–) 13.Qa6 de5 (13...f6 14.ed6 cd6 15.Ba1 e5+–) 14.Bb5 Bd7 15.Ne5 Bb5 16.Qb5 Qd7 (16...c6 17.Qc6 Qd7 18.Qd7) 17.Qd7 1–0. Taulien,Hans_Juergen (2350) – VHopffgarten,Clemens (1960), remoteschach.de, 2002.

5.Nc3 Nf6 6.e5 (6.e5 Nde4 7.ef6 Nf6 8.Qf3+–) 1–0. b4_player – opponent, gamecolony.com, 2007.

5.Nc3 g6 6.Nf3 f6 (6...Bg7 7.d4+=) 7.d4+/– g5 8.Bd3 e6 9.0–0 Nh6 10.e5 Ndf5 (10...Ndf7!? 11.ef6 g4+/–) 11.Ne4+– Rg8?? (11...Be7 12.ef6 Bf6 13.Nf6 Qf6 14.Bg5 Qg7+–) 12.Nf6 Kf7 13.Ng5 Rg5 (13...Kg7 14.Qh5 Be7 15.Nf7 Bf6 16.Nh6+–) 14.Bg5 Ng8 (14...Ng7 15.Bh6 d6+–) 15.Qh5 1–0. Taulien,Hans_Juergen (2350) – Stahn,Hartmut (2000), remoteschach.de, 2004.

5.e5 Nc4?? 6.Bc4+– e6 7.d4 c5 8.d5 d6 9.f4 (9.de6 Be6 10.Be6 fe6+–) 9...de5 10.fe5 (10.de6 Qd1 11.Kd1 Be6 12.Be6 fe6 13.fe5 Ne7+–) 10...Be7?? (better 10...Qh4 11.Kf1 Qc4 12.Qe2 Qe2 13.Ne2 ed5–/+) 11.d6 (11.Qg4 Nf6 12.ef6 Bf6+–) 11...Bh4 (11...Bd6 12.Nf3 Bc7 13.Qd8 Bd8+–) 12.g3 Bg5 13.Ba3 Nh6 14.Bc5 Bd7 15.a4 (15.Qe2 Rc8 16.Bd4 Nf5+–) 15...0–0?? (better 15...Rc8 16.Qd4 Nf5+–) 16.Nf3 (16.Qd3 Rc8 17.Bd4 Nf5+–) 16...Nf5 (16...Rc8 17.h4 (17.Ng5?! Qg5 18.Bd4 Rc4+–) 17...Bh4 18.Rh4 Rc5 19.Qd3+–) 17.0–0 (better 17.Bd3 Qa5 18.Kf2 Bh6+–) 17...Be3 (17...Rc8 18.Ba7 Rc4 19.Qe2+–) 18.Be3 Ne3 19.Qe2 Nf1 20.Kf1 a6 21.Nc3 ab5 22.Bb5 Bb5 23.Nb5 Qd7 24.Qe4 f6 25.Kg2 fe5 (25...Rac8 26.ef6 Rf6 27.Ne5+–) 26.Qe5 (26.Ne5 Qc8+–) 26...Qc6?! (26...Rf5 27.Qe1 Raf8+–) 27.c3 (better 27.Nbd4 Qc3 28.Rb1 Rf3 29.Rb3 (29.Nf3?! Qc2 30.Nd2 Qd2 31.Kg1 Qc2 32.Qe6 Kh8+–; 29.Qe6?! Rf7 30.Rb7 Raf8 31.Rf7 Rf7 32.Qe8 Rf8+–) 29...Qd2 30.Kf3 Rf8 31.Kg4 Qd1 32.Kh4+–) 27...Qf3–+ (27...Rf3? A) 28.Qe6 Kh8 29.Nd4 Rf6 (worse 29...Qc3 30.Nf3 Qb2 31.Nd2 Qa1 32.d7+=) 30.Nc6 Re6=+; B) 28.Nd4 Rg3 29.Kg3 Qc3 30.Nf3+–) 28.Kh3 Qh5 (better 28...Rf6 29.Qg5 Rg6–+) 29.Kg2 (better 29.Qh5 Rad8 30.Qe5+–) 29…Qe5 (29...Qe5 30.Re1 Qe1 31.Kh3 Qf1 32.Kh4 Rf2 33.h3 Rh2 34.g4 Rh3 35.Kg5 Qf6) 0–1. alessandrocarvalhaes (1880) – Anextiomarus (1840), lichess.org, 2019.

5.f3 idea c4, d4. Adam, Frenzel.

5.Nc3 b6

6.e5 Nb7 7.Bc4 Nc5 +/–.

6.e5 Nb7 7.d4 d6 (7...a6 8.ba6 Na5 9.d5+=) 8.Qf3+– e6 9.Bd3 d5 10.Nge2 (10.Nh3 Bb4 11.Bd2 Ne7+–) 10...Be7 (10...a6 11.ba6 Na5 12.a7+=) 11.Rb1 (11.0–0 a6+–) 11...f5 (11...a6!?+–) 12.g4 g6 (12...fg4!? 13.Qg4 g6+–) 13.gf5 gf5 14.Qh5 Kd7 15.Nd5! c6 (15...ed5 Theme: Deflection from f5 16.Bf5 A beautiful mate combination) 16.bc6 Kc6 17.Bb5 Kd5 18.Qf3 1–0. Vendelo – AnnaL, internet, 2020.

6.e5 Nb7 7.Nf3 a6 8.Bb2 Nc5 +=.

6.e5 Nb7 7.Nf3 a6 8.Ng5 ab5 9.e6 Nh6 (9...fe6 10.Bb5) 10.Qf3+= f6 11.Bd3?? (11.Nh7 de6 12.Bb5 Kf7 13.Nf8 Kf8+/–) 11...de6?? (11...fg5 12.Qh5 g6 13.Bg6 hg6 14.Qg6 Nf7 15.Qf7) 12.Bb5+/– Bd7 13.Ne6 (13.Qb7?! fg5 14.Bd7 Kd7+/–) 13...Qc8 14.Nd5 Na5?? (14...Kf7 15.Bd7 Qd7 16.Ndc7 Ra7+–) 15.Ndc7 Kf7 16.Ng5 (better is 16.Bd7 Qd7 17.Qa8 Qa4+–) 16...Kg6 17.h4 (17.Bd3 Nf5 18.Na8 Kg5 19.h4 Kh6 20.Nb6 Qc7 21.Nd7 e6 22.Bf5 ef5 23.Qf5 Ba3 24.Nf6 Qe7 25.Ne4 Bc1 26.Qf4 g5 27.Qg5 Qg5 28.hg5 Kg7 29.Rc1 Re8+–) 17...f5 (17...Nb3 A) 18.ab3? Ra1 19.Bd7 Rc1 (19...Qd7 20.Nd5 Rc1 21.Ke2 Rh1 22.Qd3 Kh5 23.Nf4 Kg4 24.Qd7 Nf5 25.Nf7+–) 20.Ke2 Qd7 21.Rc1 Qc7–/+; B) < 18.cb3 Qc7 19.h5 Kg5 20.d4 Qc1 21.Rc1 Bb5 22.Qa8 e5+–; C) 18.Qf4 Kh5 19.Bd7 (19.ab3 Ra1 20.Be2 Ng4 21.Bg4 Bg4–+; 19.cb3 Ra5 20.Bd7 Qd7 21.Qf3 Ng4+–) 19...Qd7 20.cb3+– (20.Na8 Na1 21.Qf3 Qg4+=)) 18.Nd5 Qb8?? 19.h5 Kg5 20.d4 f4 21.Bf4 Kf5 22.Bd7 e6 23.Bh6 Qf4 24.Qf4# 1–0. Buss,Michael – Mongilutz, USCF, 1995.

6.e5 Nf5 7.Bd3 d5 8.Qf3 +/–.

6.e5 Nf5 7.Qf3+/– Rb8?? 8.Qf5+– d6 9.Qd3 e6 10.Nf3 d5 (10...Bb7 11.Ne4+–) 11.a4 Ra8 12.Be2 Bb4 13.0–0 a6 14.Qd4 a5 (14...Qe7 15.Bb2+–) 15.Qg4 g6 16.Ba3 f5 17.Qf4 Bb7 (17...Bc3 18.dc3 Bb7 19.c4+–) 18.Bb4 ab4 19.Qb4 c5 (19...g5 20.Nd4 Qe7 21.Qb3+–) 20.bc6 Ba6 (20...Bc6 21.Rfb1+–) 21.Ba6 Ra6 22.c7! Qc7 (22...Qd7 23.Nb5 Ne7 24.Nd6 Qd6 25.ed6+–) 23.Qb5 Kf7 24.Qa6 Ne7 25.Ng5 Kg7 26.Ne6 (26...Kh6 27.Nc7+–) 1–0. Woschkat,Karl_Heinz – Bitterling,Erik, remoteschach.de, 2002.

6.e5 Nf5 7.Qf3+/– d5 8.Qd5 Nd4 +/–.

5.Nc3 c6

6.a4 e5 7.Nf3 Nf6 8.Qe2 Qe7 9.Ba3 b6 (9...Qe6 10.a5+=) 10.g3 (10.d4 ed4 11.e5+– (11.Nd4?! Nfe4 12.Ne4 Qe4=)) 10...Bb7= 11.Bg2 (11.d3 Qe6=) 11...c5 (11...Qe6 12.0–0=) 12.d3+= a6 13.0–0 ab5 14.ab5 Ng4 (14...Qe6 15.h3+/–) 15.Bh3 (15.Bb2+/–) 15...f5 (15...Nh6!?+/–) 16.ef5+– h5 (16...e4 17.de4 Nh6 18.Rfe1+–) 17.Nh4 g5 18.Ng6 Qf6 19.Nh8 Qh8 20.f3 e4 21.fg4 Qc3+/– 22.gh5 Nb5+= 23.de4 Ra3 24.Qb5?? Ra1 25.f6?? Be4 26.Qd7 1–0. Gregor123 – Master1, mySchach.de, 2004.

6.bc6 bc6 (6...dc6 7.e5 Nf5 8.Bb2=) 7.e5 (7.Rb1 e5+=) 7...Nf5 8.g4 (8.Rb1 d5+=) 8...Nd4 (8...Nh4 9.d4=) 9.Nf3+= White gets the initiative 9...Nf3 10.Qf3 Bb7 (10...Rb8 11.d4+=) 11.Rb1+= Rb8 12.Ba3 Qa5 13.Ne4 (13.Qf4 g5 (worse is 13...Qa3 14.e6 Qd6 15.Qf7 Kd8 16.Qf8 Kc7 17.Qg7 Qe6 18.Be2+/–) 14.Qa4 Qe5 15.Be2 a5=) 13...Qe5 14.Qe3 Qd5?? (better is 14...Nh6 15.f4 Qe6=) 15.Nd6+– Kd8 16.Qa7 (better is 16.Nb7 Ke8 17.Bg2+–) 16...c5?? (better is 16...ed6 17.Qb8 Bc8+–) 17.Qa5 1–0. mtra – lebucher1, internet, 2002.

6.Nf3 cb5

7.Rb1 a6 8.d3 f6 (8...b6 9.Be2=) 9.Be3 e6 10.Rb3 Nf7 11.Be2 Bd6 (11...d5 12.a3=) 12.0–0 Ne7 13.a4 b4 (13...ba4 14.Na4 b5 15.Nb6=) 14.Na2 a5 (14...Qa5 15.c3=) 15.Rb1 (15.c3 f5=) 15...0–0 (15...Qc7 16.Nc1=) 16.c3 bc3 17.Nc3 Bc7 18.Qc2 d5 19.Nb5 (19.Rfc1 Bd6=) 19...Bb8 20.Rfc1 Ra6 21.Nc3 (21.Qb3 Rc6=) 21...e5 (21...Rc6 22.Nd4 Qd6 23.g3=) 22.Nd5 Nd5 23.ed5 Ba7 (23...Nd6 24.Qb2 Ba7 25.Rc2=) 24.Ba7 (24.d4 Rb6+=) 24...Ra7 25.d4 Bg4 26.de5 fe5 27.Qb3 Exerts pressure on the backward pawn (27.Qe4 Bf3 28.Bf3 Ng5=) 27...Qf6 (27...e4 28.Nd4 Ne5 29.d6 Rf7 30.Bg4 Ng4+–) 28.Qe3 White is in command 28...Rfa8 29.Rc7 Bf3 (29...e4 30.Qe4 Bf5 31.Qf4 Bb1 32.Qf6 gf6 33.Nd4–+) 30.Bf3 (30.Qf3 Qf3 31.Bf3 Rd8+/–) 30...Nd6 31.Bg4 Qf4 (31...Kh8 32.Re1+/–) 32.Qf4 ef4 33.Rd7 Nc4 (33...Ne4+–) 34.Be6 Kh8 35.d6 Ne5 36.Rc7 Nc6 (36...Rd8 37.d7 f3 38.Rbb7 (38.Rcb7?! Rb7 39.Rb7 g5+–) 38...Rb7 39.Rb7+–) 37.Bc8 (37.Rcb7?! Rb7 38.Rb7 Nd8+–; 37.Rbb7?! Rb7 38.Rb7 Nd8+–) 37...Nd8 (37...Nd4+–) 38.Re1 (38.Bb7?! Nb7 39.Rbb7 Rb7 40.Rb7 Rd8+–) 38...h5 39.Re8 Kh7 40.Rd8 (40.Bf5 Kh6 41.h4 Nf7 42.Re6 g6 43.Rg6 Kh7 44.Rf7 Kh8+–) 40...b5 41.Bf5 Kh6 42.Ra8 Ra8 43.Bc8 Ra6 44.Ba6 (44.Ba6 g5 45.d7+–) 1–0. Rohde,Friedhelm – Frenzel,Lothar, corr 3GMM–28, 1995.

7.e5 b4 8.ed6 bc3 9.dc3 =.

7.e5 Nc4 8.Nb5+= Nb6 (8...d5 9.ed6 Nd6 10.Bb2+=) 9.Bd3 (9.Be2 a6 10.Nc3 d6+=) 9...a6 10.Nc3 Qc7 (10...d5 11.0–0+=) 11.0–0 (11.Qe2 e6+–) 11...e6 (11...d6 12.ed6 Qd6 13.Ne4+–) 12.Re1 (12.Bb2 Nc4 13.Bc4 Qc4+=) 12...Bc5 (12...d5 13.ed6 Bd6 14.Ne4+=) 13.Ne4 Ne7 (13...Be7 14.Bb2+–) 14.c4 (14.Nc5 Qc5 15.Rb1 Nc4+–) 14...d5 15.ed6! Bd6 16.Bb2 Nc4? (better 16...f6+–) 17.Bc4+– Bh2 (17...0–0+–) 18.Nh2 Qc4 (18...0–0+–) 19.Nd6 (19.Nd6 Kd8 20.Nf7 Kc7 21.Rc1+–) 1–0. Janek – tonact, internet, 2016.

7.Bb5!? Nb5

8.Nb5 a6 9.Nc3 g6 (9...b5 10.a3+=) 10.Bb2+/– Bg7 11.d4 (11.Rb1!?+/–) 11...d6= 12.0–0 Bg4 13.Nd5 Rc8 14.Ne3 White begins to deal mighty blows 14...Bd7 15.c4 Nf6 16.e5 Ne4 (16...de5 17.Ne5 b5 18.c5=) 17.Qc2+= f5 (better is 17...Bf5+=) 18.e6!+– Be6 19.d5 Discovered attack 19...Bd5 20.Nd5 0–0 (20...e5 21.Qa4 Kf7 22.Rab1+–) 21.Bg7 Kg7 22.Qb2 Nf6?! (22...Kh6+–) 23.Ng5 Qd7 24.Nb6 (24.Nb6 Qc6 25.Ne6 Kf7 26.Rae1+–) 1–0. Gross,Wilhelm – Frenzel,Lothar, corr SOK–90–56, 1990.

8.Nb5 d6 9.0–0+= g6 (9...Nf6 10.d3=) 10.Bb2 Nf6 (10...e5 11.d4 a6 12.Na3+/–) 11.e5 Nd5 (11...Qb6 12.a4 (12.ef6?! Qb5 13.fe7 Qb2 14.ef8B Kf8+/–) 12...de5 13.Be5+–) 12.c4 (better is 12.ed6 Rg8 13.de7 Be7 14.Re1+–) 12...Bg7? (better is 12...Bd7+/–) 13.cd5+– de5 14.Be5 (14.Rc1 0–0+–) 14...0–0 (14...Be5 15.Ne5 f6 16.Rc1+–) 15.Bg7 Kg7 16.Qe2 Bg4 17.Qe5 f6 18.Qe4 Bf5 19.Qe3 a6 20.Nbd4 Qd5 (20...Bg4 21.Rfe1+–) 21.Nf5 Qf5 22.Nd4 (22.Nd4 Qe5 23.Ne6 Kf7 24.Qe5 fe5 25.Nf8 Rf8 26.Rfb1+–; worse is 22.Qe7 Rf7 23.Qe3 Rc8+–) 1–0. Schwertel,Gottfried – Dubleumortier,Alain, corr 3GMM–39, 1996.

8.Nb5 Nf6 9.e5 Ne4 10.0–0 =.

5.Nc3 e5

6.Bd3 Qg5 7.Nf3 Qg2 8.Rg1 Qh3 9.Bf1 Qe6=+ 10.d4 ed4 11.Qd4 c5 12.bc6 bc6 13.Bf4= c5 14.Qe3+= Bb7 15.Ng5 Qf6? 16.e5+– Nf5 17.ef6 Ne3 18.Be3 gf6 19.Nge4 f5 20.Rg8! Rg8 21.Nf6 Kd8 22.Ng8 Bg7 23.Bg5 Kc7 24.Nf6 Bh8 25.Nb5 Kc6 26.Rb1 a6 27.Bg2 Kb6 28.Nd6 (28...Kc7 29.Nfe8 Re8 30.Ne8 Kc8 31.Bb7 Kb8 32.Ba6 Ka7 33.Nc7 Bc3 34.Bd2+–; 28.Nd7 Ka5 29.Bd2 Bc3 30.Bc3 Ka4 31.Nc5#) 1–0. gtate (2150) – flaviolucas (2165), net–chess.com, 2006.

6.d4 ed4 7.Qd4 f5 8.Be2 Qf6?? (better is 8...Ne7+/–) 9.e5+– Qd8 10.ed6 Bd6 (10...Qf6 11.Qe3 Qe6 12.dc7 Bb4+–) 11.Qg7 1–0. pcmvr – Hammi.Bogart, ChessWorld.net, 2003.

6.Nf3 Qe7 7.Nd5+/– Qd8 8.Ne5 Nf6 9.Qf3 Nd5 10.ed5 Qe7 11.Qe3 (better is 11.Qh5+=) 11...Nf5–/+ 12.Qe2? (better is 12.Qc3 d6 13.d4–/+) 12...Nd4–+ 13.Qe4? (13.Ng6 hg6 (13...Ne2 14.Ne7 Nc1 15.Nc8+=; 13...Qe2?! 14.Be2 hg6 15.Bd3–+; 13...fg6?! 14.Qe7 Be7 15.Bd3–+) 14.Qe7 Be7–+) 13...Nc2!! 14.Qc2 Theme: Deflection from e5 (14.Kd1 Na1 15.Qd4–+) 14...Qe5 A double attack 15.Be2 Qa1 16.Qb2 (16.Qc7 Qa2 17.Qe5 Kd8–+) 16...Qb2 17.Bb2 d6 (17...a6 18.ba6 ba6 19.Kd1–+) 18.0–0 Bf5 19.Re1 0–0–0 20.Bf3 Rg8 21.h3 g5 (21...Kd7 22.Bd4–+) 22.Bh5 (22.Bf6 Bg7 23.Bd8 Kd8 24.Kf1–+) 22...Rd7 (better is 22...Bg7 23.Bc3 Rd7–+) 23.Re8= Rd8 24.Rd8?? (24.Re1 Bg7 25.Bc3–+) 24...Kd8–+ 25.Bf7 Rg7 26.Bg7 Bg7 27.Bh5 Bd3 (27...Bd3 28.a4 Bc2–+) 0–1. Hasler,Ulrich – Frenzel,Lothar, corr SOK–88–25, 1989.

6.Nf3 f6 7.d4 ed4 8.Qd4 a6 9.Qa4 b6 10.ba6 b5? (better is 10...Bb7!?+=) 11.Nb5+– Nb5 12.Bb5 c6 13.Bc4 Qb6 (better is 13...Ba6 14.0–0 Bc4 15.Qc4 Qe7+–) 14.Qb3 Qb3 (14...Bb4 15.Bd2 Bc5 16.Bg8 Bf2 17.Kd1+–) 15.ab3 (15.cb3?! Ba6 16.a4 Ne7+–; 15.Bb3?! Ba6 16.a4 0–0–0+–) 15...Bd6 (15...d5 16.ed5 cd5 17.Bd3+–) 16.0–0 (16.Ke2 Bc5+–) 16...Ne7 (16...Bc5 17.c3+–) 17.Be3 White intends a7 (17.c3 Bc5+–) 17...Bb4 18.Ra4 Bd6 (18...Bc3 19.Rd1+–) 19.a7 Bc7 20.Rd1 d5 (20...d6 21.b4+–) 21.ed5 cd5 22.Bd5 (22.Rd5 Bd7 23.Ra6 Bc8+–) 22...Nd5 23.Rd5 (23.Rd5 Bb7 24.Rd3+–) 1–0. pierred – danieleh, chesspark.com, 2007.

6.Qh5 Qe7 7.Nd5 Qe6?? 8.Nc7+– (8.Nc7 Kd8 9.Ne6 de6 10.Qe5+–) 1–0. Yannick – Talewisx, playchess.de, 2005.

6.Qh5 Qe7 7.Nd5 Qe6?? 8.Nc7+– Kd8 9.Ne6 fe6 10.Qe5 Ke7 (10...Nf6 11.d3+–) 11.Ba3 Nf6 12.Bd6 Kf7 13.Bd3 Bd6 14.Qd6 Ne8 15.Qf4 Ke7 16.e5 b6 17.Qh4 Kf8 18.Qb4 Kf7 19.Nf3 Bb7 20.Ng5 Kg8 21.Qe7 Bg2 (21...Nd6 22.ed6 Rf8 23.Ne6 de6 24.Qe6 Rf7 25.Qe8 Rf8 26.Bc4 Bd5 27.Bd5) 22.Qf7 1–0. pierre – tuck, internet, 2010.

6.Qh5 Qe7 7.Nd5 Nf6 8.Ne7 (8.Nc7? Kd8 9.Qf3 Kc7 10.Qc3 Kd8–+) 8...Nh5 9.Nd5 Kd8 (9...Rb8 10.Nf3 c6 11.Nc3+=) 10.Nc3 (10.Nf3 f6+= (10...Ne4? 11.Ne5 Nd6 12.Ba3+–)) 10...Be7 (10...f5 11.Nf3 fe4 12.Ne5+=) 11.Nf3 Re8 12.g4 (12.d3 f6+=) 12...Nf6 (12...Nf4 13.Ne5 Bf6 14.d4+=) 13.Ne5= Bf8 (13...Nfe4 14.Ne4 Bh4 15.Nd6 cd6 16.Bc4=) 14.d4+= Nfe4 15.Ne4 Ne4 (15...f6 16.Bd3 Ne4 17.Be4 fe5 18.d5+=) 16.Nf7+/– Ke7 17.Bc4 White intends g5 17...Kf6 (17...Nf6 18.Ba3 d6 19.g5+/–) 18.0–0 Bb4 19.g5 Kg6 20.Ne5 Kf5 21.Be2 Do you see the mate threat? 21...Ke6 22.Bg4 (22.Bh5 Rf8 23.Bg4 Ke7+/–) 22...Ke7 23.Bf5 (23.Bf3 Nd2 24.a3 Nf3 25.Nf3 Bc3+/–) 23...Nd6 (23...d5 24.Bh7 Bc3 25.Ba3 Ke6 26.Rad1 Ng5 27.Bg6 Bd4 28.Ng4 (28.Be8?! Be5 29.f4 Nh3 30.Kh1 Nf4+–; 28.Rd4?! Ke5 29.Rd3 Rg8+–) 28...Nf3 29.Kh1+–) 24.Bh7 Nb5 25.Rb1 a5 26.Bg6 (26.a3 Na3 27.Ba3 Ba3+/–) 26...Rg8 (26...Nc3 27.Rb3 d6 28.Be8 de5 29.Re1+–) 27.Bf7 Rd8 28.g6 Kf6 (28...Rh8 29.Bg5 Kd6 30.Nc4 Kc6 31.d5 Kc5 32.Be3 Nd4 33.Rfd1+–) 29.Nf3 (29.a3 Na3 30.Rb3 Nc2 31.Rf3 Ke7 32.Bg5 Kd6 33.Bd8 Nd4+–) 29...Rh8 30.Rb3 (30.Re1 Rh5 31.Re5 Re5 32.de5 Kf5+–) 30...Nd6 31.Bg5 (31.Ne5 Rh5+–) 31...Kf5+/– 32.Re3 (32.a3 Nf7 33.gf7 Bd6+/–) 32...Ne4 (32...Nf7 33.gf7 b5 34.Rb1+–) 33.Bh4+– c6 (33...a4 34.Bg3+–) 34.Bg3 (34.a3 Bf8+–) 34...d5 35.Be5 (35.c4 Nd6 36.Bd6 Bd6 37.cd5 Bf4+–) 35...Bf8 (35...Nf6 36.c3 Be7 37.Bc7+–) 36.c4 White gets deadly initiative 36...dc4 37.Bc4 Nd6 38.Bd3 Kg4 39.Rb1 Bf5 (39...Ra7 40.Kh1 Kh5 41.Rg1+–) 40.Bd6 Bd3 (40...Bd6 41.Rb7 Bd3 42.Rd3+–) 41.Rb7 Bd6 42.Rd3 Kf5 (42...Rh3 43.Kg2 Rh6 44.Rg7+–) 43.Rg7 (43.Rg7 Rag8 44.Ra7 Rg6 45.Kf1 Bh2 46.Ra5 Ke6 47.Rc3+–) 1–0. Pandit – Blumberg, email 4AMM–09, 1997.

6.Qh5 Nf6 7.Qe5 Be7 8.Qf4 0–0 9.e5 1–0. PassedPawn – byron_de, ChessWorld.net, 2003.

6.Qh5+/– Nf6 7.Qe5 Be7 8.Qf4 Ng8 +–.

6.Qh5+/– Nf6 7.Qe5 Be7 8.Qf4 Nh5? 9.Qf3 g6 10.g4 Ng7 11.e5 Ne6 12.ed6 Bd6 13.Nge2 Be5 14.Bb2 Ng5 (14...h5+–) 15.Qe3 d6 16.d4 Bg4 17.Bg2 Rb8 (17...0–0 18.de5 f6 19.f4+–) 18.de5 1–0. PassedPawn – Hammi.Bogart, ChessWorld.net, 2003.

6.Nf3 Nf6

7.d3 c6 8.d4 Nde4 9.Ne4 Ne4 10.de5 cb5 11.Bb5 Qa5! 12.Nd2 Nd2 13.Bd7 Bd7 14.Bd2 Qe5 15.Kf1 Bc6 16.Qe2 Bb5 17.Re1 0–0–0 18.Bf4 Be2 19.Re2 Rd1 20.Re1 Re1# 0–1. Trkn – warjournal, itsyourturn.com, 2000.

7.d3 Qe7 8.Bg5 Nb5 9.Nd5 =.

7.d3 Be7 8.Bd2 (8.Ne5 c6 9.a4 a6+/–) 8...0–0 (8...c6 9.a4+=) 9.Ne5+/– Nde8 10.Be2 d6 11.Nf3 a6 12.0–0 ab5 13.Nb5 c6 14.Nbd4 Nc7 15.c4 Nfe8 (15...c5 16.Nb3+/–) 16.Qb3 Na6 17.Nf5 Bf6 18.d4 c5 19.Rab1 (19.Rfd1 Bf5 20.ef5 cd4 21.Qb7 d3–/+) 19...cd4 20.N3d4 Nc5 21.Qc2 Be5 22.f4 Bf6 23.Bb4 Nc7 (23...Qb6 24.Bc3 Qa7 25.Ra1+/–) 24.e5+– Be7 25.Ne7 Qe7 26.Bd3 h6 27.Rfe1 N7a6 28.Bh7 Kh8 29.Bc3 Ne6 (29...de5 30.Re5 Qh4 31.Nf5 Bf5 32.Qf5+–) 30.Nf5 Qd7 (30...Qc7 31.Nd6 g6 32.f5 Kh7 33.fe6 fe6 34.Bd4+–) 31.Nd6 Nf4 32.Bf5 Ne6 33.Qf2 Qe7 34.Rf1 Nac5 (34...Kg8+–) 35.Be6 Ne6 36.Bb4 (36.Nf7?! Kg8 37.Bb4 Qf7 38.Bf8 Qf8 39.Qf8 Nf8+=) 36...Qc7 (36...Qg5 37.Nf7 Rf7 38.Qf7 Ra2 39.Rf2 Rf2 40.Qf2 Qe5 41.Re1+–) 37.Nf7 (37.Nb5 Qe5 38.Bf8 Nf8+–) 37...Rf7 38.Qf7 Qf7 (38...Qc4 39.Rbc1 Qd4 40.Kh1 Qb4 41.Qe8 Kh7 42.Rc8 Rc8 43.Qc8+– (43.Qe6?! Qf4 44.Rg1 Rc5+=)) 39.Rf7 Ra2 40.Rbf1 (40.Bd6 Kg8 41.Rbf1 Kh7+–) 40...Ra4 41.Re7 Rb4 (41...Kh7 42.Re8+–) 42.Re8 Kh7 43.Rc8 Kg6 44.g3 b5 (44...Ra4+–) 45.Rc6 (45.Rc6 bc4 46.Re6 Kg5 47.h4 Kh5 48.Rc6+–) 1–0. Woschkat,Karl_Heinz – Frenzel,Lothar, corr SOK–91–71, 1991.

7.Bd3 Qe7 +=.

7.Qe2 =.

7.Ne5 Qe7 8.f4 Nfe4 9.Nd5 Qh4 10.g3 +=.

5.Nc3 e6

6.d4 a6 7.e5 Nb5 8.Nb5 ab5 9.Bb5+=.

6.d4 b6 7.Nf3 a6 8.ba6 Ba6 9.Ba6 Ra6 10.0–0 g6 (10...Ne7 11.d5+=) 11.Qd3 (11.Qe2 Ra5+–) 11...Ra8 12.Rd1 Bg7 (12...Be7 13.e5 Nb7 14.d5+–) 13.Bf4+– Qe7 +–. Pcmvr – Byron_de, ChessWorld.net, 2003.

6.Nf3 b6 7.e5 Nf5 8.Be2 (8.Bd3+= Bb7 9.Qe2 Nh4 10.Nh4 Qh4 11.Be4=; 8.Rb1 Bb7 9.Be2 a6 10.ba6 Ba6 11.d3=) 8...a6 9.0–0 Bb4 10.a3 Bc3 11.dc3 +=.

6.Nf3 Rb8 7.Be2 A) 7...f5 8.e5 (8.d3 a6 9.a4 Ra8 10.Rb1 ab5 11.ab5+/–) 8...Ne4 9.0–0 Bb4 10.Ne4 fe4 11.Ne1+/–; B) 7...a6 8.a4 f6 9.d4 Ra8 10.ba6 ba6 11.e5+/–.

6.Nf3 Ne7 A) 7.Be2 A1) 7...Ng6 8.0–0 (8.d4 a6 9.ba6 b6 10.0–0 Ba6 11.Ba6+=; 8.d3 Be7 9.0–0 0–0 10.d4 a6 11.ba6=) 8...Nf4 9.d4 Ne2 10.Qe2 Be7 11.Bf4+=; A2) 7...f5 8.e5 (8.d3 Ng6 9.Be3 Be7 10.e5 Nf7 11.d4+=) 8...Ne4 9.0–0 a6 10.Ne4 fe4 11.Ng5+/–; A3) 7...b6 8.e5 Ndf5 9.0–0 a6 10.d4 ab5 11.Nb5+=; A4) 7...a6 8.ba6 b6 9.0–0 Ba6 10.Ba6 Ra6 11.Qe2+=; B) 7.d4 B1) 7...c6 8.a4 (8.Bd2 Ng6 9.Bd3 cb5 10.Nb5 Nb5 11.Bb5+=; 8.bc6 Nc6 9.Be2 f5 10.ef5 Nf5 11.d5=) 8...cb5 9.ab5 Qc7 10.Qd3 f5 11.Bd2+/–; B2) 7...a6 8.ba6 ba6 9.e5 Nb7 10.Bd3 c5 11.0–0+=; B3) 7...f5 8.e5 (8.Bd3 fe4 9.Ne4 Ne4 10.Be4 Nf5 11.c3+=) 8...Nf7 9.Bd3 Ng6 10.0–0 Be7 11.Qe2+=; B4) 7...Ng6 8.Bd3 Be7 9.0–0 0–0 10.Be3 f5 11.Ne5+=; C) 7.Bd3 Ng6 8.Rb1 (8.e5 Nf5 9.Bf5 ef5 10.0–0 d5 11.d3+=) 8...f5 9.ef5 Nf5 10.Bf5 ef5 11.0–0+=.

6.Nf3 f5 A) 7.d3 A1) 7...Nf7 8.Rb1 (8.Qe2 Ngh6 9.Bb2 Be7 10.Rb1 0–0 11.Qd2=; 8.ef5 ef5 9.Be2 Bb4 10.Bb2 Nf6 11.a3=; 8.a3 d5 9.e5 a6 10.d4 ab5 11.Bb5+=; 8.Be3 Bb4 9.Bd2 Qf6 10.Ne2 Bd2 11.Nd2=; 8.e5 d6 9.d4 de5 10.de5 Qd1 11.Nd1=) 8...d5 9.e5 d4 10.Ne2 a6 11.Ned4+=; A2) 7...Be7 8.Be2 (8.Be3 Nf7 9.ef5 ef5 10.Be2 Nf6 11.0–0+=; 8.e5 Nf7 9.Be2 a6 10.0–0 ab5 11.Nb5+=) 8...a6 9.ba6 ba6 10.Rb1 Bb7 11.e5+=; A3) 7...a6 8.ba6 ba6 9.Rb1 Bb7 10.e5 Nb5 11.Nb5+=; B) 7.ef5 Nf5 8.Bb2 (8.Bd3 Nf6 9.0–0 Be7 10.Re1 0–0 11.Bf5=) 8...Nf6 9.Bd3 Bc5 10.Bf5 ef5 11.Qe2=; C) 7.e5 C1) 7...Nf7 8.Bc4 (8.d4 g5 9.Bc4 g4 10.Nd2 d6 11.ed6+=; 8.Rb1 g5 9.d4 d6 10.ed6 g4 11.Nd2+=; 8.Bb2 g5 9.d4 Bg7 10.h3 d6 11.ed6+=) 8...d5 9.ed6 Nd6 10.Bb3 Nf6 11.0–0+/–; C2) 7...Ne4 8.Bb2 (8.Bd3 d5 9.ed6 Nc3 10.dc3 Bd6 11.0–0+=; 8.Be2 a6 9.0–0 Nc3 10.dc3 ab5 11.Bb5+=; 8.Rb1 a6 9.ba6 b6 10.Ne4 fe4 11.Nd4=) 8...Nh6 9.Be2 Be7 10.d3 Nc3 11.Bc3+=.

6.Nf3 f6 A) 7.a4 A1) 7...f5 8.e5 (8.d3 Nf7 9.ef5 ef5 10.Be3 Nf6 11.Bd4=) 8...Ne4 9.Be2 d5 10.0–0 Nc3 11.dc3+/–; A2) 7...b6 8.e5 (8.Bb2 Bb7 9.Bd3 a5 10.0–0 Qe7 11.Ba3+=; 8.Bd3 a6 9.Bb2 Bb7 10.0–0 ab5 11.ab5+=; 8.d4 Bb7 9.Bd3 a6 10.Bf4 ab5 11.Nb5+=; 8.Ba3 a6 9.ba6 Ba6 10.Ba6 Ra6 11.0–0+=) 8...Nf5 9.Bd3 fe5 10.Ne5 Qf6 11.Ng4+/–; A3) 7...Be7 8.Rb1 (8.d4 a6 9.Bf4 g5 10.Bg3 ab5 11.Nb5+=; 8.Ba3 f5 9.Bd6 Bd6 10.ef5 ef5 11.Bc4+=; 8.Be2 a6 9.ba6 ba6 10.d3 Bb7 11.0–0+=; 8.Bb2 a6 9.Be2 ab5 10.ab5 Ra1 11.Qa1+=; 8.Bd3 a6 9.Ba3 Nf7 10.ba6 ba6 11.0–0+=) 8...a6 9.d4 b6 10.Bd3 ab5 11.ab5+=; A4) 7...a6 8.ba6 (8.Bb2 b6 9.Bd3 Bb7 10.0–0 ab5 11.ab5+=) 8...ba6 9.Rb1 Bb7 10.d3 Rb8 11.Be2+=; B) 7.d4 B1) 7...f5 8.e5 (8.Bg5 Be7 9.Be7 Qe7 10.e5 Ne4 11.Ne4+=) 8...Nf7 9.Bd3 d6 10.0–0 de5 11.de5+=; B2) 7...a6 8.Bd3 ab5 9.Nb5 Nb5 10.Bb5 Bb4 11.Bd2+=.

6.Nf3 g6 7.Bd3 Bg7 (7...f5 8.e5 (8.Bb2 Bg7 9.ef5 gf5 10.0–0 Nf6 11.Ne5+=) 8...Nf7 9.Bc4 g5 10.d4 g4 11.Nd2+=) 8.0–0 (8.Qe2 f5 9.e5 Nf7 10.Bc4 g5 11.d4+=; 8.Bb2 f5 9.ef5 gf5 10.0–0 a6 11.a4+=; 8.Rb1 f5 9.Bb2 Ne4 10.Be4 fe4 11.Ne4+=) 8...Ne7 (8...f5 9.ef5 gf5 10.Bb2 Nf6 11.Re1+=) 9.e5 Ndf5 10.g4 (10.Bb2 0–0+= 11.Re1+=; 10.Be2 g5 11.g4+=) 10...Nh6= 11.h3 (11.g5=) 11...0–0 12.Be2 Nd5 (12...f6!? 13.ef6 Bf6= (worse is 13...Rf6 14.g5 Rf3 15.Bf3+/–)) 13.Nd5+= ed5 14.d4 c6 (better is 14...d6!?+/–) 15.Bg5+– Qe8 (15...f6 16.ef6 Rf6 17.Bf6 Bf6 18.Qd2+–) 16.Qd2 cb5? (better is 16...Ng4 17.hg4 Qe6+–) 17.Bh6 Qe6 (17...d6 18.Bg7 Kg7 19.ed6+–) 18.Bg7 Kg7 19.Qb4 (19.Bb5 d6+–) 19...a6 (19...d6 20.Qd6 Qd6 21.ed6+–) 20.Ng5 Qc6 (20...Qe8 21.Rae1+–) 21.Nh7! Rh8 (21...Kh7 22.Qf8) 22.Ng5 d6 23.Rfe1 (23.f4!? b6+–) 23...de5 24.de5 a5 (24...Be6+–) 25.Qe7 Be6 26.Bb5! Qb6 (26...Qb5 27.Ne6) 27.Qf6 Kg8 28.Nf7! Rh3 (28...Bf7 29.Qb6) 29.Qg6 Kf8 30.Ng5 Rh8 31.Re3 d4 (31...Rh3 32.Qf6 Kg8 33.Rh3 Qf2 34.Kf2 Bg4 35.Rh8) 32.Rf3 Ke7 33.Qf6 1–0. pierre – vbogi, internet, 2008.

6.Nf3 g6 7.d4 f5 8.Bg5 (8.e5 Nf7 9.Bd3 d6 10.0–0 de5 11.de5+=) 8...Be7 9.Be7 Qe7 10.e5 Ne4 11.Ne4 +=.

6.Nf3 g6 7.Be2 A) 7...f5 8.e5 (8.Bb2 Bg7 9.e5 Nf7 10.d4 d6 11.ed6+=; 8.d3 Bg7 9.e5 Nf7 10.d4 d6 11.ed6+=) 8...Nf7 9.0–0 g5 10.d4 g4 11.Nd2+/–; B) 7...f6 8.d4 (8.Bb2 a6 9.ba6 b6 10.0–0 Ba6 11.Ba6+=; 8.a4 b6 9.d3 a6 10.Bb2 Bg7 11.0–0+=; 8.0–0 a6 9.ba6 b6 10.d4 Ba6 11.Bf4+=; 8.Rb1 a6 9.ba6 b6 10.0–0 Ba6 11.d3+=; 8.d3 a6 9.ba6 b6 10.0–0 Ba6 11.Bf4+=) 8...a6 9.ba6 b6 10.0–0 Ba6 11.Ba6+=; C) 7...b6 8.e5 Nf5 9.0–0 Bb7 10.Rb1 a6 11.ba6+=; D) 7...a6 8.ba6 (8.Bb2 Bg7 9.ba6 ba6 10.e5 Nf5 11.0–0+=; 8.e5 Nb5 9.Nb5 ab5 10.Bb5 c6 11.Be2=) 8...b6 9.e5 Nf5 10.a7 Ra7 11.d4+=.

6.Nf3 Nh6 7.d4 (7.Be2 f5 8.e5 Ne4 9.0–0 Bb4 10.Na4 Nf7 11.c3+=) A) 7...Ng4 8.h3 Nf6 9.Bd3 Ng8 10.0–0 f5 11.ef5+–; B) 7...Ng8 8.Bd3 (8.Rb1 a6 9.ba6 b6 10.e5 Nf5 11.d5+=) 8...f5 9.e5 Nf7 10.0–0 d6 11.ed6+/–; C) 7...f5 8.Bh6 (8.Bg5 Be7 9.Bh6 gh6 10.Ne5 0–0 11.Bd3+/–) 8...gh6 9.Ne5 Qg5 10.h4 Qg7 11.Qh5+/–.

6.Nf3 Be7

7.Rb1 A) 7...b6 8.Bd3 (8.e5 Nf5 9.Bd3 Bb7 10.Qe2 Ngh6 11.0–0+=; 8.Be2 a6 9.ba6 Ba6 10.d3 Bb7 11.0–0+=; 8.Bb2 a6 9.ba6 Ba6 10.Ba6 Ra6 11.Qe2+=) 8...a6 9.ba6 Ba6 10.Ba6 Ra6 11.0–0+=; B) 7...f5 8.e5 (8.d3 Nf7 9.d4 fe4 10.Ne4 Nf6 11.Nf6+=) 8...Nf7 9.d4 g5 10.Bd3 g4 11.Nd2+=; C) 7...a6 8.Bb2 (8.ba6 b6 9.e5 Nf5 10.d4 Ba6 11.Ba6+=) 8...b6 9.ba6 Ba6 10.Ba6 Ra6 11.Qe2+=.

7.Bd3 A) 7...Nh6 8.Bb2 (8.Ba3 0–0 9.0–0 f6 10.Re1 Ng4 11.Bf1+=; 8.0–0 f5 9.e5 Ndf7 10.Be2 0–0 11.d4+=; 8.Be2 f5 9.e5 Ne4 10.0–0 0–0 11.Nb1+=; 8.Rb1 f5 9.e5 Ndf7 10.0–0 Ng4 11.Qe2+=) 8...a6 9.a4 0–0 10.0–0 ab5 11.ab5+=; B) 7...a6 8.ba6 (8.Bb2 Nh6 9.ba6 ba6 10.Rb1 Rb8 11.e5+=) 8...ba6 9.Rb1 f6 10.Ba3 Nb7 11.Be7+=; C) 7...f6 8.0–0 (8.Bb2 Nh6 9.0–0 a6 10.a4 0–0 11.Qe2+=; 8.Rb1 b6 9.0–0 Nh6 10.Be2 a6 11.ba6+=; 8.Ba3 Nf7 9.Bb2 Ngh6 10.0–0 0–0 11.Re1+=) 8...a6 9.ba6 ba6 10.Rb1 Bb7 11.Qe2+=; D) 7...f5 8.Bb2 (8.e5 Nf7 9.0–0 g5 10.Re1 c5 11.Kh1+=) 8...Nh6 9.e5 Ndf7 10.0–0 d6 11.ed6+=.

7.Be2 A) 7...b6 8.0–0 (8.e5 Nf5 9.0–0 a6 10.d4 ab5 11.Nb5=; 8.Bb2 a6 9.0–0 f6 10.a4 Bb7 11.ba6+=; 8.d4 a6 9.0–0 Bb7 10.e5 Nb5 11.Nb5=; 8.a4 a6 9.Bb2 Bb7 10.0–0 ab5 11.ab5+=) 8...a6 9.Bb2 Bb7 10.ba6 Ba6 11.Ba6+=; B) 7...f5 8.e5 (8.d3 a6 9.ba6 fe4 10.de4 b6 11.Be3+=) 8...Ne4 9.0–0 Nc3 10.dc3 a6 11.c4+=; C) 7...a6 8.Bb2 (8.0–0 Nb5 9.Nb5 ab5 10.Bb5 Ra5 11.a4+=; 8.d4 Nb5 9.Nb5 ab5 10.Bb5 Nf6 11.Qe2=; 8.e5 Nb5 9.Nb5 ab5 10.Bb5 b6 11.0–0=; 8.ba6 b6 9.0–0 Ba6 10.d3 Bb7 11.Be3+=) 8...b6 9.0–0 f6 10.a4 Bb7 11.ba6+=.

7.d4 A) 7...a6 8.ba6 (8.e5 Nf5 9.Bd3 ab5 10.Nb5 d5 11.Bf4+=; 8.Bd3 Nb5 9.Nb5 ab5 10.Bb5 Nf6 11.Qe2=; 8.Bf4 Nb5 9.Nb5 ab5 10.Bb5 Nf6 11.Qe2=) 8...b6 9.d5 Ba6 10.Ba6 Ra6 11.0–0+=; B) 7...c6 8.bc6 (8.a4 a6 9.ba6 b6 10.a7 Ra7 11.Bf4+=; 8.Rb1 cb5 9.e5 Nc4 10.Nb5 d5 11.ed6+=) 8...dc6 9.Bd3 Rb8 10.0–0 a6 11.Bf4+/–; C) 7...b6 8.e5 (8.Bd3 a6 9.0–0 Nb5 10.Nb5 ab5 11.Bb5=) 8...Nf5 9.Bd3 Bb7 10.d5 Bb4 11.Bd2+=.

7.Bb2 A) 7...Nh6 8.Bd3 (8.Rb1 b6 9.e5 Ndf5 10.Bd3 Bb7 11.0–0=; 8.Be2 f5 9.e5 Ne4 10.d3 Nc3 11.Bc3+=; 8.e5 Ndf5 9.Be2 d5 10.ed6 Qd6 11.Bd3=; 8.d4 0–0 9.Bd3 f5 10.e5 Ndf7 11.0–0+=; 8.a3 0–0 9.Bd3 f5 10.e5 Ndf7 11.Bc4=; 8.a4 f5 9.e5 Ne4 10.Ne4 fe4 11.Nd4+=) 8...a6 9.ba6 ba6 10.Rb1 Rb8 11.0–0+=; B) 7...f6 8.d4 (8.Bd3 a6 9.ba6 ba6 10.Rb1 Nh6 11.0–0+=; 8.a4 a6 9.Be2 ab5 10.ab5 Ra1 11.Ba1+=; 8.Be2 a6 9.ba6 b6 10.Rb1 Nh6 11.0–0=; 8.Rb1 a6 9.ba6 b6 10.d4 f5 11.ef5+=; 8.a3 b6 9.Bd3 a6 10.a4 Bb7 11.0–0+=; 8.d3 a6 9.ba6 b5 10.Be2 Ba6 11.0–0+=) 8...a6 9.ba6 b6 10.e5 Nf7 11.d5+=; C) 7...f5 8.e5 Nf7 9.Bc4 a6 10.ba6 ba6 11.Rb1+=; D) 7...a6 8.a4 (8.Be2 Nh6 9.a4 0–0 10.0–0 f5 11.e5+=; 8.Bd3 b6 9.0–0 Bb7 10.Qe2 ab5 11.Nb5+=; 8.ba6 ba6 9.Rb1 Bb7 10.Bd3 f6 11.Qe2+=; 8.Rb1 b6 9.ba6 Nh6 10.e5 Ndf5 11.Bd3=) 8...Nh6 9.Be2 ab5 10.ab5 Ra1 11.Qa1+=.

5.e5 Nf5

6.Nf3 d5 7.d4 e6 8.Bd3 Nge7 9.g4 Nh6 10.h3 f6 (10...Nhg8 11.h4+=) 11.ef6 (11.Bh6!? gh6 12.ef6+/–) 11...gf6+= 12.0–0 (12.a3 Nf7+=) 12...c6 13.Qe2 Qc7 14.bc6 Nc6 (14...Qc6?? 15.Bb5+–) 15.c4 Nb4 16.cd5 Nd3 17.Qd3 ed5 18.Re1 Kd8 19.Qb5 Qc6 20.Nc3 Qb5 21.Nb5 Bd7 22.Rb1 Rg8 23.Bh6 Bh6 24.Nd6 Kc7 25.Nb7 f5 (25...Rae8!? 26.Re8 Re8+/–) 26.Re2+– Bc8?? (better is 26...Rab8 27.Rc2 Bc6+–) 27.Ne5 (better is 27.Re7 Bd7 28.Nc5 fg4 29.Rd7 Kc8+–) 27...Bb7 28.Rc2 Kb8 (28...Kd8 29.Nf7 Ke8 30.Nh6 Rg6 31.Nf5 Ba6+–) 29.Nd7 1–0. Macko (1780) – Huib, playchess.de, 2006.

6.Nf3 d6 7.Bc4 e6 8.Bb2 d5 9.Bd3 Bc5 10.Bf5 ef5 11.d4 Bb6 12.0–0 Ne7 13.a4 Ng6?? (better is 13...a5+=) 14.a5+– 0–0 15.ab6 cb6 16.Nc3 Be6 17.Qe2 a5 (17...Re8 18.Ra2+–) 18.ba6 ba6 19.Ra6 Nf4 20.Qb5 Ra6 21.Qa6 g5 22.g3 (22.Ra1!? g4 23.Ne1 Qc7+–) 22...Nh3 23.Kg2 f4 24.Qb5 h5 (24...g4 25.Ng1 f3 26.Kh1 Ng1 27.Kg1+–) 25.Nd2 h4 (25...g4 26.Ba3 f3 27.Kh1+–) 26.Ba3 Re8 27.Rb1 hg3 28.hg3 Kg7 29.Qb6 Qc8 (29...g4 30.Qd8 f3 31.Kf1 Rd8 32.Nb3+–) 30.Bc5 Rh8 31.Nb5 Nf2 (31...g4 32.Kf1+–) 32.Kf2 (32.Nd6!? Qd7 33.Kf2 Rh2 34.Ke1 Bg4 35.gf4 Re2 36.Kd1 Re5 37.Kc1 Re1 38.Kb2 Rb1 39.Kb1 gf4+–) 32...Rh2 33.Ke1 Qh8 34.Nc7 (better is 34.Nf1 fg3 35.Bf8 (35.Nh2?! Qh2 36.Qd8 g2 37.Qg5 Kh7=) 35...Kg8 36.Qd8+–) 34...Rh1 35.Nf1 Qh3?? (35...Rf1 36.Kd2 Qh2 37.Kc3 Rb1 38.Ne8 Kg6 39.Qb1 fg3+=) 36.Qa6 Qg3 37.Kd2 Qf2 38.Kc3 Rh6 (38...Qf3 39.Kb2+–) 39.Rb8 (better is 39.Ne8 Kg6 40.Qd3 Kh5 41.Nf6 Rf6 42.ef6+–) 39...Bf5 (39...Qf3 40.Kb2 Kg6 41.Rg8 Kf5+–) 40.Bf8 Kg8 41.Bh6 Kh7 (41...Bc8 42.Qc8 Kh7 43.Qh8 Kg6 44.Qf6 Kh7 45.Rh8) 42.Rh8! Kh8 (42...Kh8 43.Qf6 Mate attack) 43.Qf6 1–0. Macko – Romel, playchess.de, 2005.

6.Nf3 e6 7.c4 (7.d4 a6+=) 7...c6 8.Be2 Bc5 (8...d6 9.d4=) 9.Bb2 Nge7 10.0–0 0–0 11.d3 cb5 12.cb5 a6 13.a4 ab5 14.ab5 Ra1 15.Ba1 Qa5 16.Nc3 Ng6 17.Qa4 b6 18.Qa5 ba5 19.Bb2 (19.Rc1 Ba3 20.Rc2 Bb7+=) 19...Nd4 20.Nd4 Bd4 21.Na4 Nf4 (21...Be5!? 22.Be5 Ne5+=) 22.Bf3+/– Bb2 23.Nb2 Rd8 (23...f6 24.Ra1 fe5 25.Ra5+/–) 24.d4 (24.Ra1 f6 25.ef6 gf6 26.Ra5 d5+–) 24...d6 25.Rd1 (better is 25.Ra1!?+–) 25...de5+= 26.de5 Nd5 (26...Rd1!? 27.Bd1 Nd5+=) 27.b6 Bb7 28.Ra1 (28.Nc4!? a4 29.Nd6+/–) 28...Rc8 29.g3 (29.Ra5 Rc1 30.Nd1 Nb6=) 29...g5 30.Ra5 g4 (30...Rc1 31.Kg2 g4 32.Bd5 ed5 33.Ra7=) 31.Bg4 Nb6 (31...Rc1 32.Nd1 Nc3 33.Ra7 Nd1 34.f3 Ne3 35.Kf2 Ng4 36.fg4+=) 32.Bh3 (better is 32.Rb5 Rc6 33.Nd3+–) 32...Rc1+= 33.Bf1 Bd5 (better is 33...Rb1!? 34.Nd3 Be4=) 34.Nd3+= Rb1 35.Rc5 (35.f4!?+=) 35...Nc4 (35...Bc4!? 36.Kg2 Rd1 37.Rc4 Nc4+=) 36.f4= Nd2 (better is 36...Be4 37.Rc8 Kg7=) 37.Rc1+/– Rc1 38.Nc1 Nf3 39.Kg2 (better is 39.Kf2+/–) 39...Ne5= 40.Kg1 Nf3 41.Kg2 Ng5 42.Kg1 Nf3 ½–½. valpa – froilo, playchess.de, 2003.

6.g4 Nfh6= 7.d4 d6 8.ed6 Qd6 (8...Bg4 9.dc7 Qc7 10.Be2 Be2 11.Ne2+=) 9.f3 e5 10.de5 Qe5 11.Qe2 Qe2 12.Ne2 Bd7 13.Nbc3 Bb4 14.a3 Ba5 15.Kf2 0–0–0 (15...a6 16.ba6 Ra6 17.Be3=) 16.Bb2 (16.Be3 Kb8=) 16...f6 17.Ng3 Ne7 18.Na4 a6 19.c4 (19.ba6 Bb6 Double attack (19...Ba4 Pinning; 19...Ba4 Deflection; 19...Bb6 Decoy)) 19...ab5 20.cb5 Nd5 21.Nc5 Bb6 22.Rc1 Rhe8 23.Nge4 (better is 23.Bd4=) 23...Ng4!–+ 24.Kg3 (24.fg4 f5 Double attack (24...Re4 Deflection; 24...f5 Decoy; 24...Re4 Overloading)) 24...Nge3 25.Nd7 Kd7 26.h4 Kc8 (26...f5 27.Ng5 Ra8–+) 27.Be2 (better is 27.Bh3!? Kb8 28.Nc5–+) 27...Nf5–+ 28.Kg2?? (28.Kh2–+) 28...Nf4 29.Kf1 (29.Kh2 Rd2!! 30.Rce1 Rb2–+ (30...Ne2?! 31.Nd2 Bf2 32.Ne4 Be1 33.Re1–+)) 29...Ne3 (better is 29...Re4 30.Rh2 Ng3 31.Ke1 Nd3 32.Kd2 Nc1 33.Kc1 Re2 34.Re2 Ne2 35.Kc2–+) 30.Kf2 Nc4 (30...Nc4 31.Kf1 Nd2 32.Ke1 Ng2 33.Kd1 Ne4 34.Kc2 Nf2–+) 0–1. nay (2215) – vitorluiz (2350), net–chess.com, 2007.

4.e4 Nh4

5.Bb2 d5 6.Qh5 e6 7.Nc3 Ng6 8.ed5 Nf6 9.Qe2 Nd5 10.Nf3 a6 11.a4 Nb4 12.Qd1 ab5 13.ab5 Ra1 14.Ba1 Be7 15.Bc4 0–0 16.0–0 b6 17.Re1 Bb7 18.Ne4 Bd5 19.Bd5 Qd5 20.Nc3 Qh5 21.Qb1 Nf4 22.Ne4 Qg6 23.g3 Qg4 (24.Nfg5 Ne2 25.Kf1 Bg5 26.Qb4 f5 27.Bg7 Kg7 28.Qb2 Kg8 29.Ng5 Ng3 30.hg3 Qg5 31.Re6 Qd2+/–) +/–. pcmvr (2150) – marekt (2610), ChessWorld.net, 2003.

5.Bb2 d6 6.f4 Ng6 7.f5 Ne5 (7...e6!? 8.fg6 Qh4 9.Ke2 Qh5 10.Ke1 Qh4 11.Ke2 Qh5 12.Ke1 Qh4 13.Ke2=) 8.d4+= Nd7 9.Nd2 Ngf6 10.c4 a6 11.e5 de5 12.de5 Ng8 13.e6 Ndf6 14.ef7 Kf7 15.ba6 Ra6 (15...ba6 16.Qf3 Rb8 17.Be5=) 16.c5 Ra5 17.Bc4 Ke8 18.Qb3 (better is 18.Nb3 Qd1 19.Kd1+/–) 18...Bf5?? (better is 18...Nh6=) 19.Bf7+– (19.Qb7?! Rc5 20.Ngf3 Nh6+=) 19...Kd7 20.Nc4 Qa8 21.Rd1 (better is 21.0–0–0 Kc8 22.Na5 Qa5 23.Be6 Be6 24.Qe6 Kb8 25.Rd8 Ka7+–) 21...Kc8 22.Be6!! Be6 (22...Nd7 23.Bf5 Ngf6 24.Bf6 ef6 25.Bd7 Kb8+–) 23.Nb6! cb6 24.Qe6 (24...Nd7 25.Qd7 Kb8 26.Qd8 Ka7 27.Qb6 Kb8 28.Rd8#) 1–0. Woschkat,Karl_Heinz – Frenzel,Lothar, corr SOK–92–83, 1992.

5.Bb2 Ng6 6.Nf3+= d6 7.d4 Bg4 (7...Nf6 8.Bd3+=) 8.Nbd2 (8.h3 Bh5+=) 8...e5 (8...Nf6 9.h3 Bf3 10.Qf3+=) 9.h3 Bd7 (9...Bf3 10.Nf3 Nf6 11.Bd3+=) 10.de5+/– de5 11.Ne5 Ne5 12.Be5 Ne7 13.Bb2 (13.Bc4 Ng6 14.Bb2 Qg5+/–) 13...Ng6 (13...Be6 14.Bc4+/–) 14.c4 (14.Bc4 Qg5 15.Qf3 Be6 16.Be6 fe6+/–) 14...Qg5 (14...Be6 15.c5+/–) 15.Qb3 (15.Bd4 Nf4 16.Qf3 a6+/–) 15...Be6 (15...0–0–0 16.Rd1+/–) 16.g3 (16.Nf3 Qf4 17.Bd3 0–0–0+/–) 16...0–0–0 Threatening mate: Qxd2 17.0–0–0 (17.f4 Qh6+/–) 17...Qc5 (17...Qh6 18.f4 Bg4 19.Re1+/– (worse is 19.hg4 Qh1 20.f5 Ne7=)) 18.f4+/– f5 (18...Bd7 19.Nf3 f5 20.ef5 Qf5 21.Bg2+–) 19.ef5 (19.Bd3 Ne7+/–) 19...Bf5 20.Qf3 Kb8 (20...Qb6 21.g4 Bd7 22.f5+–) 21.Bg2 Do you see the mate threat? 21...c6 22.bc6 Rd3 23.Qh5 Rg3 (23...bc6 24.Be4 Be4 25.Qc5 Rd2 26.Qf8 (worse is 26.Kd2 Bc5 27.Bg7 Bb4 28.Ke3 Re8+=) 26...Rf8 27.Kd2 Bh1 28.Rh1+–) 24.Be4 Be4 25.Qc5 Bc5 26.Ne4 Be3 27.Kb1 Rf3 28.f5 (28.Rd7 bc6 29.Bg7 Rg8+–) 28...Rf5 29.cb7 Rg8 (29...Re8 30.Nd6 Rff8 31.Bg7+–) 30.Rd7 Ne5 31.Rd5 Bf4? (better is 31...Re8!?+–) 32.Rf1 g5 33.Nd6 Rgf8 (33...Rf6 34.Rf4! gf4 35.Be5 Rg1 36.Kc2 Rg2 37.Kd3 Rd6 38.Bd6 Kb7 39.Bf4 Rg7+–) 34.Rc5 (34.Be5 Be5 35.Nf5 Bf4+–) 34...Nc6 35.Rf4! Rc5 (35...gf4 36.Rc6) 36.Rf8 (36.Rf8 Kc7 37.Rc8 Kd6 38.Rc6 Kc6 39.b8Q Rc4 40.Qc8 Kd5 41.Qd7 Kc5 42.Qa7 Kc6 43.Qh7+–) 1–0. Jacewicz,Grzegorz – Frenzel,Lothar, corr 3GMM–28, 1996.

5.d4 d5 6.Bg5 Ng6 =.

5.d4 d5 6.Qh5 e6+=.

5.Nf3 e6 6.d4 d5 7.e5 a6+=.

4.e4 Nfh6

5.Bb2 Nf6 6.Bf6 ef6 7.Nf3 f5 8.e5 Bc5 (8...d6 9.Qe2 de5 10.Qe5 Be7 11.Bc4=+) 9.d4 Bb6 10.c4 (10.c3 d5=) 10...Ba5 11.Nbd2 d6 12.ed6 Qd6 13.c5 Qe6 (13...Qf4 14.Bd3=) 14.Qe2 Qe2 15.Be2 0–0 (15...Be6 16.0–0–0+=) 16.0–0 Re8 17.Bc4 f4 18.Nb3 b6 (better is 18...Bc3!? 19.Rac1 Bb2+=) 19.Na5+– ba5 20.Rfe1 Be6 21.Be6 fe6 22.a4 (22.Ng5 e5 23.Re5 Nf7 24.Nf7 Kf7 25.Rf5 Kg8 26.Rf4 a6 27.ba6 Ra6+–) 22...Nf5 23.Re4 a6 24.ba6 Ra6 25.Rf4 Rb8 26.Re4 h6 27.g4 Ne7 28.Ree1 Rb4 29.Reb1 (29.h4 Kf7+/–) 29...Nc6 (29...Nd5 30.Rd1+/–) 30.Rb4 ab4 31.Kf1 Ra8 (31...b3 32.h3+/–) 32.Ke2 b3 33.Kd3 Rf8 34.Ke3 (better is 34.Ke4+/–) 34...Nb4= 35.Rb1? (better is 35.Ne1 Nd5 36.Kd3 Rf2 37.Rb1=) 35...Nd5–+ (36.Kd3 Rf3 37.Kc4 Rf2 38.Rb3 Rh2–+) 0–1. KHW – somusque, ChessWorld.net, 2002.

5.Nc3 c6 6.Rb1 cb5 7.Bb5 a6 8.Be2 e5 9.d4 ed4 10.Qd4 Nf6 11.Bh6 gh6 12.e5 Ng8 13.Ne4 d6?? (13...Qa5 14.Kf1 Qa2+–) 14.ed6 (14.Nd6?! Bd6 15.ed6 Nf6+–) 14...f6 (14...Qa5 15.Kf1 Bf5+–) 15.Bh5 Kd7 16.Nc5 Kc6 17.Bf3 1–0. pcmvr – Kunk, ChessWorld.net, 2003.

5.c4 e5 6.Nf3 d6 7.Nc3 Nf6 8.d3 (8.Be2 a6=) 8...g6 (8...Nhg8 9.Be2+=) 9.Bg5 Be6 10.d4 ed4 11.Nd4 Bg7 12.Qd2 Nhg4 13.f3 Ne5 14.Ne6 fe6 15.Be2 0–0 16.0–0 Qd7 17.Be3 Nf7 18.Rfd1 b6 19.a4 Rac8 (19...a5 20.f4+=) 20.a5+/– Ne8 21.ab6 ab6 22.Ra7 Qd8 23.Rda1 Qf6 24.R1a3 Qh4 25.Bf2 Qh5 (25...Qf6 26.f4+/–) 26.f4 Bc3 27.Rc3 Qh6 28.Rh3 Qg7 29.Rha3 (29.Bg4 Qf6+–) 29...Qf6 30.Bg4 Nh6 (30...Rd8!?+/–) 31.Bd4+– Qf7 32.Bh3 Nf6 33.Bb6 Nfg4 34.g3 e5 35.Qe2 ef4 36.Bg4 Ng4 37.Rf3 (better is 37.Qg4 fg3 38.Ra1+–) 37...Qe6+/– 38.Rc7 Rc7 (38...fg3!? 39.hg3 Rfe8+/–) 39.Bc7 fg3 40.Rf8 Kf8 41.hg3 Ne5 42.b6 Qd7 (42...Qe7+–) 43.Qb2 Kf7 (43...Nf3 44.Kg2 Ng5 45.Qf6 Nf7 46.Kf3+–) 44.b7 Qg4 (44...Nc6 45.b8Q Nb8 46.Qb8 Ke7+–) 45.Qf2 Ke6 46.b8Q Nf3 47.Qf3! (47.Qf3 Qf3 48.Qe8 Kf6 49.Qf8 Ke6 50.Qf3+–) 1–0. Spiegel,Ulrich – Frenzel,Lothar, corr, 1989.

5.d4 c6 6.Nc3 cb5 7.Bb5 a6 8.Bc4 (8.Bd3 e6+/–) 8...e6 9.Rb1 (9.Bd3 d5+=) 9...g6 (9...Qc7 10.Qd3=) 10.Nf3 (10.a4 Qc7 11.Qd3 b6+/–) 10...Bg7 (10...Qc7 11.Qd3+=) 11.Bg5 (11.Bd3 Qc7 12.Rb3 Ne7+/–) 11...Ne7 (11...Qc7!? 12.Qd3 b5+=) 12.Qd2+/– Nhg8 13.0–0 b5 14.Be2 Qc7 15.a4 ba4 16.Na4 Nf6 17.Nc5 0–0?? (better is 17...d6 18.e5 de5 19.Ne5 Nfd5 20.Be7 Ne7+/–) 18.e5+– Ne8 (18...Nfd5 19.c4 f6 20.cd5 Nd5 21.ef6 Bf6+–) 19.Be7 (19...f6 20.Bf8 Bf8 21.Nd3+–) 1–0. fajgo – fe19, Internet, 2002.

5.d4 c6 6.Bd3 cb5 7.Nf3 e6 8.0–0 a6 9.a4 ba4 10.c4 Bd6 11.c5 Bb8 12.Qa4 f6 13.Na3 Nf7 14.Nc4 Ne7 15.Nb6 Ra7 16.Nc8 Qc8 17.Bd2 0–0 18.Rfc1 Nd8 19.Qb3 Kh8 20.Rab1 Ndc6 21.d5 ed5 22.ed5 Ne5 23.Be2 (23.Ne5!? Be5 24.Be3 Qb8+–) 23...Nf5 24.Qa4 Qc7 25.d6 Nf3? (better is 25...Qc6 26.Qc6 Nc6+/– (26...bc6? 27.Ne5 fe5 28.Bd3+–)) 26.Bf3+– (26.gf3?! Qc6 27.Qc6 bc6+=) 26...Nd6?? (26...Qc8+–) 27.Ba5 (27.cd6?! Qd6 28.Qb4 Qh2 29.Kf1 Re8+–) 27...Qc8 28.cd6 Qe8 29.Bb6 Qe6 (29...Ra8 30.Re1 Qf7 31.Qd4+–) 30.Ba7 Ba7 31.Rb7 Re8 32.Qe4 (32.Ra7?? Qe1 33.Re1 Re1) 32...Qf7 (32...Qe4 33.Be4 Bb8 34.Rd7 Rf8+–) 33.Qe8! Qe8 34.Ra7 h5 35.Ra8 1–0. capablancaven – mynox (1700), gameknot.com, 2011.

5.d4 e6 6.Bd3 Bb4 7.c3 Ba5 8.Nf3 d5 9.e5 Ne7 10.Bh6 gh6 11.Qc1 a6 (11...c6!?+/–) 12.Qh6+– ab5 (12...Rg8 13.h4 Rg2 14.Qh7+–) 13.Ng5 (< 13.Bb5 c6 14.Bd3 Qb6+/–) 13...Qd7 14.0–0 (< 14.Bh7 Qc6 15.0–0 Bc3 16.Nc3 Qc3 17.Nf7 Rf8+/–) 14...Ng6 15.Nh7 Kd8 16.Qg7 Qe8 17.Qf6 (17.Ng5!? Rf8 18.f4+–) 17...Qe7+/– 18.Qg7 (18.Bg6 Qf6 19.ef6 fg6 20.f7+/–) 18...Qe8+– 19.Qf6?? (19.Ng5 Rf8+–) 19...Qe7+/– 20.Qg7 (better is 20.Bg6!? Qf6 21.ef6 (21.Nf6?! fg6 22.a3 Ra6+=) 21...fg6 22.f7+/–) 20...Qe8= ½–½. Scarian – Austin, internet, 2005.

5.Nf3 d6 6.d4 Nf6 7.Nc3 b6 8.Bd3 Nhg4 9.h3 Nh6 10.e5 de5 11.de5 Nd7 12.Be4 Rb8 13.e6 fe6 14.Bc6 (14.Bh6 g6 15.Ng5 Nf6 16.Qd8 Kd8+–) 14...Bb7?? (better is 14...Nf5 15.Ng5 Bb7 16.Ne6 Qc8+–) 15.Ne5 Bc6 16.Nc6 Qc8 17.Bh6 Ra8 18.Qh5 g6 19.Qh4 Bh6 (19...Nf6+–) 20.Qe7 1–0. Pleschke,Helmut – Korhonen,Paul, IECG, 1999.

5.Nc3 e6

6.Bc4 c6 7.Qe2 a6 8.bc6 dc6 9.Nf3 b5 10.Bb3 a5 11.a3 a4 12.Ba2 b4 13.ab4 Bb4 14.Qc4 Qb6 15.Bb3 Ba6 16.Ra4 Bc4 17.Ra8 Ke7 18.Bc4 Qc5 19.Bb3 Bc3 20.dc3 Qc3 21.Bd2 Qc5 22.Bh6 gh6 23.0–0 Kf6+= 24.Rd1 Kg7 25.Rdd8 Qb4 26.h3 c5 27.Nd2 h5 28.Kh1 Qc3 29.Rd3+= Qb2 30.Rg3 Kh6 31.Nf3 c4 32.Ng5 Kg6= 33.Ne6 Kf6 34.Ng7 h4 35.Ra6 Ke7 36.Nf5 Kd8 37.Ra8 Kc7=+ 38.Rg4?? cb3–+ 39.Rag8 bc2 40.Rh8 c1Q–+ 41.Kh2 Qf2 42.Rc8 0–1. NN – Fritz 8, 2004.

6.Bc4 Nf6 7.Qe2 Be7 8.e5 Nfg8 9.Nf3 d5 10.Bb3 Nf5 11.d4 a6 12.Rb1 ab5 13.Qb5 c6 14.Qd3 b6 15.Ba4 b5 16.Bb3 b4 17.Ne2 Ba6 18.c4 c5 19.dc5 Bc5 20.g4 Nh4 21.Ba4 Kf8–/+ 22.Nh4 Bc4–+ 23.Ng6 hg6 24.Qc2 Qh4 25.Nf4?? Qf2! 26.Qf2 Bf2 27.Kf2 Ra4 28.Ke3? g5 29.Nh5 Nh6 30.Kd4 Ba2 31.Rb2 Ng4 32.Ng3 b3 33.Kc5 Ne5 34.Rd1 Nc4 35.Re2 Ra5 36.Kd4 (36.Kb4 Ra8 37.Bb2 f5–+) 0–1. NN – Fritz 8, 2004.

6.Bc4 Nf6 7.Qe2 Be7 8.e5 Nfg8 9.Nf3 Nf5 10.d4 d5 11.Bd3 Ngh6 12.0–0 0–0 13.a3 Bd7 14.Rd1 c6 15.a4 Qa5 16.Bb2 Qb4 17.Ra2 Rfc8 18.Nb1+= Qa5 19.Qd2 Qb6 20.Nc3 cb5 21.ab5+= a6 22.Na4 Qc7= 23.b6 Qd8 24.Nc5 Bc5 25.dc5 Rc5 26.Ba3 Rc6=+ 27.Qf4 Rb6 28.c4 Ba4 29.Rdd2 Bc6 30.Bc2 a5 31.Bc5 Rba6 32.cd5? Bd5–+ 33.Ra4 Qc7 34.Bd4 Bf3 35.Qf3 b5 36.Be4 ba4 37.Ba8 Qd8 38.Bb7?? Rb6?? 39.Bb6–/+ Qd2 40.h3 Qe1–+ 41.Kh2 Qe5 42.Kh1 Qb5 43.Bc7?? Nd4 44.Qe4 Qf1 45.Kh2 Ne2 46.h4 If White now only could play Ba6... 46...Qg1 47.Kh3 Qh1 48.Bh2 Ng1 49.Kg3 Nf5 50.Kg4 0–1. NN – Fritz 8, 2004.

6.Bc4 Nf6 7.Qe2 Be7 8.e5 Nfg8 9.Nf3 Nf5 10.d4 d5 11.Bd3 Ngh6 12.0–0 0–0 13.a4 Bd7 14.a5 c6+= 15.bc6 Bc6 16.Ba3 Ba3 17.Ra3 Rc8 18.a6 b6 19.Rb1 Qc7 20.Nb5 Bb5 21.Rb5 f6 22.Rb4 Qe7 23.Rab3 Qd8 24.Rb1 Qc7 25.c4 fe5 26.cd5 ed5 27.de5 Qe7 28.Rb5 Rfd8 29.Qd2 Qe6 30.Re1 Rc5 31.Rb4 Qe7 32.g4 Nh4 33.Be2?? Rc2!–+ 34.Qc2 Qb4 35.Nd2 Ng4 36.Bd3?? Qd2!! 37.Bh7 Kf8 38.Qd2 Nf3 39.Kf1 Nd2 40.Ke2 Ne5 41.Kd2 Nf3 42.Kd1 Ne1 43.Ke1 g5 44.Bf5 Ke7 45.Ke2 Kf6 46.Bc2 d4 47.h3 b5 48.Bd3 b4 49.Kd2 b3 50.Kc1 Rh8 51.Bf1 Rb8 52.Bd3 b2 53.Kb1 Ke5 54.Bc2 Kf4 55.Bd3 Kf3 56.Bf5 Kf2 57.Bd3 Ke3 58.Bf5 d3 59.Be6 d2 60.Bg4 0–1. NN – Fritz 8, 2004.

6.Nf3 d5 7.Bb2 Nf6 8.e5 Nd7 9.Be2 Ng4 10.d4+= Be7 11.h3 Nh6 12.0–0 0–0 13.Bd3 Nb6 14.a3 Nf5 15.Qd2 Nc4 16.Bc4 dc4 17.g4 Nh6 18.Ne4 Qd5 19.Qf4 Qb5=+ 20.Rab1 Qd5 21.Nc3 Qa5–/+ 22.Nd2 b5 23.Qf3 Bd7 24.a4 c6 25.ab5 cb5 26.Ra1 Qc7 27.Ra6? f5 28.ef6 Bf6 29.Ba3 Be7?? 30.Qe4?? Ba3–+ 31.Ra3 b4 32.g5 Nf5 33.Nd5 ed5 34.Qd5 Kh8 35.Ra6 Qf4 36.Nc4 Qg5 37.Kh2 Qf4 38.Kg1 Ng3! 39.Qd7 Nf1 40.f3 Nh2 41.Ne5 (41.Qd5 Qg3 42.Kh1 Nf3 43.Qf3 Rf3 44.Rf6 Qe1 45.Kg2 Qf2 46.Kh1 Rh3#) 0–1. NN – Fritz 8, 2004.

5.d4 d5

6.ed5 Qd5 7.Nc3 Qd6 8.Nge2 Bg4 9.Bf4 Qf4 10.Nf4 Bd1 11.Ncd5?? 0–0–0–+ 12.Rd1 g5 13.Nh3 Rd5 14.Bc4 Rd7 15.Ng5 e6 16.Nf7 Bb4 17.Ke2 Nf7 18.Be6 Nf6 19.Bd7 Kd7 20.c4 Rg8 21.g3 Ne4 22.Rdf1 Nd2 23.Rc1 Nd6 24.a3 Re8 25.Kd3 N2e4?? 26.Rc2–/+ Ba3 27.Ra1 Bb4 28.Ra7 Be1 29.Raa2 Nf5 30.c5 Nf6 31.Re2=+ Re2 32.Re2 Bb4 33.Kc4 Ba3 34.Ra2 Bc1 35.Ra7 Bb2–/+ 36.d5 Bd4–+ 37.f3 Bg1 38.b6 Ne3 39.Kb5 Ned5 40.h3?! Ne8 41.f4? Ke6 42.Rb7 cb6 43.Rb6 Nb6 44.cb6 Nd6 45.Kc6 Bh2 46.b7 Nb7! 47.Kb7 Bg3 48.Kc6 Bf4 49.Kc5 Ke5 50.Kc4 Ke4 51.Kc5 Be5 52.h4 h5 53.Kc6 Bf6 54.Kc7 Bh4 55.Kc6 Bf6 56.Kc5 0–1. NN – Fritz 8, 2004.

6.ed5 Qd5 7.Nc3 Qd6 8.Nge2 Bg4 9.Bf4 Qf4 10.Nf4 Bd1 11.Ncd5?? 0–0–0–+ 12.Rd1 g5 13.Nh3 Rd5 14.Bc4 Rd7 15.Ng5 e6 16.Nf7 Bb4 17.Ke2 Nf7 18.Be6 Nf6 19.Bd7 Kd7 20.c4 Rg8 21.g3 Ne4 22.Rdf1 Nd2 23.Rc1 Re8 24.Kd3 Nd6 25.a3 N2e4?? 26.Rc2–/+ Ba3 27.Ra1 Bb4 28.Ra7 Nc8 29.Raa2 c5 30.bc6 bc6 31.Rcb2 c5 32.f4 Ned6 33.Re2 Re2 34.Re2 Nb6 35.Rc2 h6 36.g4=+ Ba3 37.f5 Na4 38.dc5 Nc5 39.Kc3 Nce4–+ 40.Kd4 Bc5 41.Ke5 Be3 42.h3 Nf2 43.Rc3 Nh3 44.c5 Nf7 45.Ke4 Bf2 46.c6 Kc7 47.f6 Bh4 48.Kf5 Nf2 49.Rc2 Nd8?? 50.g5 hg5 51.Rd2 Kc8?? 52.Rc2?? g4–+ 53.Ke5 Bg3 54.Kd5? Nd1 55.Rc1 Ne3 56.Ke4 Bf2 57.Rc3 g3 58.c7 Nf7 59.Kf3 Nd5 60.Rc1 Nf6 61.Rc2 Ne5 62.Kg2 Nd3 63.Kf1 Nd5 64.Rd2 (64.Re2 N3f4 65.Rf2 Ne3 (65...gf2?! 66.Kf2 Nd3 67.Kf3–/+) 66.Ke1 Nd3 (66...gf2?! 67.Kf2 Ned5 68.Kf3–/+) 67.Ke2 gf2 68.Kd3 f1Q 69.Ke3 Kc7–+) 0–1. NN – Fritz 8, 2004.

6.ed5 Qd5 7.Nc3 Qd6 8.Nge2 Bg4 9.Bf4 Qf4 10.Nf4 Bd1 11.Ncd5?? 0–0–0–+ 12.Rd1 g5 13.Nh3 Rd5 14.Bc4 Rd7 15.Ng5 e6 16.Nf7 Bb4 17.Ke2 Nf7 18.Be6 Nf6 19.Bd7 Kd7 20.c4 Rg8 21.g3 Ne4 22.Rdf1 Nd2 23.Rc1 Re8 24.Kd3 Nd6 25.a3 N2e4?? 26.Rc2–/+ Ba3 27.Ra1 Bb4 28.Ra7 Be1 29.Raa2 Nf5 30.c5 Nf6 31.Re2=+ Re2 32.Re2 Bb4 33.Kc4 Ba3 34.Ra2 Bc1 35.Ra7 Bb2–/+ 36.d5 Bd4–+ 37.f3 Bg1 38.b6 Ne3 39.Kb5 Ned5 40.Rb7 Kc8 41.c6? Ne8 42.Kc4 Nb6 43.Kd3 Bh2 44.g4 Nd6 45.Ra7 Bf4 46.Ra6 Kd8 47.Ra5 Nbc4 48.Ra8 Ke7 49.Rh8 Ne5 50.Kd4 Nf3 51.Kd5 Ng5 52.Rb8 Nde4 53.Kc4 Nf6 54.Rb4 Ng4 55.Kb3 (55.Rb1 Ne3 56.Kd3 Kd6–+) 0–1. NN – Fritz 8, 2004.

6.ed5 Qd5 7.Bf4 Bf5 8.Qd2 Qd7 9.Nf3 Be4 10.Ne5 Qf5 11.Nc3 0–0–0 12.g4! Ng4 13.Bh3 N8f6 Black launches an attack 14.Rg1 h5 15.Nf7 Nd5 16.Nd5 Qf7 17.Nc7 g5 18.Be5+– Rh6 19.f4 gf4 20.Bf4 Rg6 21.Qc3 Kd7 22.Bg3 Bg7 23.Rf1 Rf6 24.Rf6 ef6 25.Bf4 Rc8= 26.b6 ab6 27.Bf1 Bh6 28.Bh6 Rc7–+ 29.Bb5 Kd8 30.Qd2 Qe7 31.Be2 Rc2 32.Qd1 Nh6 33.Rc1 Qb4 34.Kf1 Ng4 35.Bg4 0–1. NN – Fritz 8, 2004.

6.ed5 Qd5 7.Bf4 Nf5 8.c3 Nd6 9.Qe2 Nf6 10.Be5 Bg4 11.f3 Bf5 12.c4 Qe6 13.c5 Nc8 14.Bc7 Qe2 15.Ne2 Nd5 16.Be5 Nb4 17.Ng3 Nc2=+ 18.Kf2 Bg6 19.b6 a6 20.c6 Nb6?? 21.cb7+– Na1 22.ba8Q Na8 23.Ba6 f6 24.Bf4 e6 25.Bb5 Kd8 26.Rc1 Nc2 27.Bc6 Nb4= 28.Bb5 Nc2 29.Rd1 Nc7 30.a4 Nd5 31.Ne2 Nd4 32.Nd4 Bb1?? 33.Ne6+– Ke7 34.Ng7!! Rg8 35.a5 Bg7 36.Rd5 Rd8 37.Rc5 Ke6 38.Rc7 Bf8 39.a6 Kd5 40.Bc4 Kd4 41.Be3 Ke5 42.a7 Bb4 43.Rb7 Ra8 44.Rb4 Bc2 45.Rb8 Ra7 1–0. NN – Fritz 8, 2004.

4.Nf3 d5

5.Bb2 Qd6 6.h3+– Ng3?? (better 6...Qe6+–) 7.fg3 (7.Be5!? Nh1 8.Bd6 cd6+–) 7...Qg3 8.Ke2 Bd7 9.Be5 Bb5 (9...Qg6 10.Nc3 Nf6+–) 10.c4! Bc4 (10...Bc4 11.d3 Decoy; 10...dc4 11.Bg3 Combination) 11.d3 Qg6 12.dc4 dc4 (12...0–0–0 13.Qa4 a6 14.Qa5+–) 13.Bc7 Rc8 (13...Qe6+–) 14.Ne5 Qe6 15.Qa4 b5 16.Qb5 Qc6 17.Qc6 1–0. Janek – terfig, internet, 2017.

5.Bb2 Bd7 6.a4 e6 7.Be2 Bd6? (7...f6 8.Nc3+=) 8.0–0?? (8.g4 Nge7+–) 8...Nh4?? (better is 8...Nf6=) 9.Bg7+– Nf3 (9...Ng6+–) 10.Bf3 Qg5 11.Bh8 e5 (11...0–0–0 12.Bb2+–) 12.Bd5 0–0–0 13.d3 (better is 13.Qf3 f5 14.Bb7 Kb8+–) 13...Nh6 (13...Ne7 14.Bb7! Kb7 15.Qf3 Kb8 16.Bf6+–) 14.Nd2 e4 (14...Rh8 15.Qf3+–) 15.Be4 Rg8 (15...Rh8 16.Qf3 Ng4 17.Bb7 Kb8+–) 16.Bd4 Bh3 (16...Bg4 17.f4 Qh5 18.Qc1+–) 17.g3 (17.Bb7!? Kb8 18.f4 Qg6+–) 17...Ng4 (17...Bf1 18.Nf1 Nf5 19.Ba7+–) 18.Bg2 (18.Qf3!? Bf1 19.Bb7 Kd8 20.Nf1 f6+–) 18...Bg2 19.Kg2 Nh2 (19...Qg6 20.Nc4+–) 20.Ne4 (20.Kh2?? Qh4 21.Kg2 Rg3 22.fg3 Qg3 23.Kh1 Qh2) 20...Qh4 (20...Qf5 21.Nd6 cd6 22.e4+–) 21.Nd6 cd6 22.Rh1 h5 23.Rh2 Qg5 24.Qh5 1–0. Hal1958 – Kubik, playchess.de, 2005.

5.Bb2 e6 6.c4 Bd7 7.cd5 ed5+=.

5.Bb2 e6 6.c4 Nf6 7.Bd3 Be7 (7...dc4 8.Bc4 Nd6 9.Be2=) 8.0–0= dc4 9.Bc4 0–0 10.a4 (10.d4 a6=) 10...Nd6 11.Ne5 Nc4 12.Nc4 Bd7 (12...Qd3 13.Ne5 Qd6 14.d3=) 13.Bf6 Bf6 (< 13...gf6 14.Qg4 Kh8 15.d4+=) 14.Nc3 c6 (14...Rc8 15.Qf3 c6 16.Nd6=) 15.Rb1 (15.d4!?=) 15...cb5=+ 16.Nb5 Bc6 (better is 16...Bb5 17.Rb5 Qd3=+) 17.d4?? (better is 17.Nbd6=) 17...Qd5–+ 18.Qb3 (18.f3 Qc4 19.Nd6–+) 18…Qg2 0–1. Zimmer,Georg – Frenzel,Lothar, corr Bilguer, 1990.

5.Bb2 e6 6.c4 Nf6 7.cd5 ed5 (7...Nd5? 8.e4+–) 8.Bd3 Bd6 9.Qc2 Nh6 10.0–0 0–0 (10...Qe7 11.a3+=) 11.Bd4 (11.Bf6 Qf6 12.Nc3 c6+=) 11...Be6 (11...Bg4 12.Ng5 g6 13.Nc3=) 12.Ng5+= g6? (12...Bh2 13.Kh2 Nfg4 14.Kg1 Qg5 15.Bh7 Kh8 16.f3+=) 13.Ne6 (better 13.Bg6!? Bh2 14.Kh2 Qd6 15.Kg1 fg6 16.Bc5+–) 13...fe6+= 14.Bg6 (better 14.f4 Qe7 15.Nc3+=) 14...Bh2?? (better 14...e5 15.Bh7 Nh7 16.Qg6 Kh8–/+) 15.Kh2+– Nfg4 16.Kg1 (better 16.Kg3 Qd7 17.Nc3+–) 16...Qh4?? (16...e5 17.Bh7 Kh8 18.Be5 Ne5+–) 17.Bh7 Kf7 18.Bg6 (better 18.Qc7 Ke8 19.Bg6 Nf7+–) 18...Ke7 (18...Kg8 19.Qc7 Nf7+–) 19.Qc7 1–0. DEFFM – guestGDYJ, freechess.org, 2017.

5.Bb2 Nf6 6.c4 e6 7.a3 Be7 (7...Nd6 8.cd5 ed5 9.Bd4=) 8.d4 (8.cd5 ed5 (8...Nd5? 9.e4+–) 9.Bd3 Nd6=) 8...0–0 (8...Bd7 9.cd5 ed5 10.Bd3=) 9.cd5 ed5 10.Bd3 Be6 (10...Nd6 11.Nc3=) 11.0–0 Ne4 (11...Nd6 12.Qc2=) 12.Nbd2 (12.Qc2 Nfd6+=) 12...Nfd6= 13.Qc2 f5 (13...Bf5 14.Nb3=) 14.a4 (14.Rac1 Rc8+=) 14...Rc8 15.Nb3 (15.Ne5 Nf7=) 15...c6 (15...Nc4 16.Bc4 dc4 17.Na5=) 16.Nc5 Bf7 (16...Nc5 17.dc5 (17.Qc5? Nc4 18.Qa7 Nb2–+) 17...Ne4 18.Nd4=) 17.Ne5 (17.bc6 Rc6 18.Ne5 Rc7=) 17...Nc5 (better is 17...cb5!? 18.ab5 b6=) 18.dc5+/– Ne4 19.bc6 bc6 20.f3 Nc5 21.Bf5+– Bg6? 22.Ng6 hg6 23.Bg6 Bf6 24.Qc5 Bb2+/– 25.Rab1 Qf6 26.Qc2 Be5 27.f4 Bd6 28.Rf3 d4?? 29.Rb7 de3 30.Qc4 (30...Qf7 31.Bf7 Rf7 32.Qf7 Kh7 33.Qg7) 1–0. gtate (2000) – mari (1985), net–chess.com, 2006.

5.d4 Nf6 6.Bd3 e6 (6...Nd6 7.Ba3=) 7.0–0+= Bd6 8.Bf5 (8.Ba3 0–0+=) 8...ef5= 9.Nbd2 (9.Ba3 a6=) 9...0–0 10.a4 f4 (10...a6 11.ba6 b6 12.Ba3=) 11.Nb3 (11.ef4 Bf4 12.Ne5 Re8=) 11...Ne4 (11...fe3 12.Be3 Ne4 13.Re1=+) 12.Qd3 (12.ef4!? a6 13.Re1=) 12...Bf5–/+ 13.Qe2 (13.ef4? Ng3 14.Qd2 Nf1 15.Kf1 Qe7–+) 13...Re8 14.Bb2 (14.c4 fe3 15.fe3 dc4–/+) 14...Bg4 15.Rfe1 (15.a5–/+) 15...fe3 (15...Bb4 16.Rec1–/+) 16.fe3 (better 16.Qe3!? Bh5 17.Ne5=+) 16...Qf6 17.Rf1 (better 17.h3 Bh5 18.Ba3–+) 17...Qh6 18.g3 (18.h3 Ng3 19.Qd2 Re3–+) 18...Ng5 19.Nbd2 Nf3 (19...Re3! 20.Qg2 Bh3 21.Qf2 Bf1 22.Ng5 Qg5 23.Rf1–+) 20.Nf3 Re3 (20...Qe3?! 21.Qe3 Re3 22.Ne5–+) 21.Qg2 Bh3 (better 21...Qh5!? 22.Ne5 Be5 23.de5–+) 22.Qf2 Bf1 23.Rf1? (better 23.Bc1 Rf3! 24.Qf3–+) 23...Rae8?? (better 23...Re6–+) 24.Bc1 (24.Ne5 f6 25.Bc1 Be5 26.Be3 Bg3 27.Bh6 Bf2 28.Rf2 Re1 29.Kg2 gh6 30.Rf6 Ra1–/+) 24...Re2 (better 24...Qe6!? 25.Be3 Qe3–/+) 25.Bh6= Rf2 26.Rf2 gh6 27.Kg2 (27.Nh4 c6=) 27...Re4 (27...Re3 28.Nh4=) 28.c3= Re3 (28...h5 29.Nh4=) 29.Rc2 Kg7 30.Kf2 Re7 31.Nh4 Kf6 32.Nf3 c6 33.Nd2 (33.c4 c5=) 33...c5=+ 34.Nb3 (34.Nf3 Re6=+) 34...c4–/+ 35.Na5 Kf5 (better 35...Rd7 36.Rb2 h5–/+) 36.Kg2? (36.Re2 Rd7=) 36...Kg4 (36...Ke4!? 37.Rf2 Kd3 38.Rf3 Kd2–+) 37.Rf2 f5 38.h3 Kg5 39.Rf3 (39.Kf3 h5 40.h4 Kf6–/+) 39...Ba3 (39...h5 40.Kf1–/+) 40.Rf2 h5 41.h4 Kg6 (41...Kf6 42.Kf3–/+) 42.Ra2 Bd6 43.Rf2 h6 44.Kf3 b6 (44...Kf6!?–/+) 45.Nc6=+ Rc7 (45...Re1!? 46.Re2 Bg3 47.Ne7 Kf7 48.Nf5 Re2 49.Ke2 Bf4=) 46.Re2= a6?? (better 46...Kf6 47.Nd8 Re7 48.Re7 Ke7 49.Nc6 Kd7 50.Na7 Ba3=) 47.Re6+– Kf7 48.Rh6 (better 48.Rd6 ab5 49.ab5+–) 48...ab5 49.ab5 Ba3 (49...Rd7 50.Ne5 Be5 51.de5+–) 50.Rh5 (better 50.Rh7 Ke6 51.Rc7+–) 50...Kf6 51.Rh6 Kg7 52.Rh5 Bc1?? (52...Kf6 53.Rh8 Bb2+–) 53.Rf5 Kg6 (53...Rf7 54.Kg4 Rf5 55.Kf5 Bb2+–) 54.Rd5 Rf7 (54...Bb2 55.Ne5 Kg7 56.Rd7 Rd7 57.Nd7 Bc3 58.Nb6 Bd4 59.Nc4+–) 55.Kg2 (55.Ke4 Kh7 56.Ne5 Rf6+–) 55...Rf6 (55...Rc7 56.Ne5 Kf5 57.Rd6+–) 56.Ne5 Kg7 57.Rd7 Kh6 (57...Kf8 58.Nc4 Rg6 59.h5+–) 58.Ng4 Kg6 59.Nf6 Kf6 60.Rd6 Ke7 61.Rb6 Kd7 (61...Bb2 62.Rc6 Bc3 63.Rc4+–) 62.Rc6 (62.Rc6 Ba3 63.Rc4+–) 1–0. Dino_Jarach (1860) – jiogetsmoney (1850), lichess.org, 2018.

5.Be2 Nd6 6.0–0 Bg4 7.Nc3 Nf6=.

5.Be2 e6 6.0–0 Nf6 =.

5.Be2 e6 6.c4 (6.0–0 Nf6=) 6...dc4 7.Bc4 Nd6 8.Be2 Nf6 9.0–0 (9.Nc3 Be7=) 9...Be7 10.Nc3 0–0 11.Qc2 (11.Ne5 Nd5=) 11...Nd5 (11...a6 12.ba6 b6 13.e4=) 12.Nd5 (12.Bb2 Bd7=) 12...ed5 13.Bb2 (13.Nd4 Bf6 14.Bb2 Re8=) 13...Bf5 14.Qc3 (14.Qb3 Be6=) 14...Bf6 15.Nd4 Ne4 16.Qc1 Bg6 (16...Be6 17.Ne6 fe6 18.d3=) 17.d3+= Nd6 18.Qc5 Re8 19.Rfc1 Nf5 20.Rc2 (20.Bf3 c6 21.bc6 Bd4 22.Bd4 bc6 23.Qc6 Nd4 24.ed4 Rb8+/–) 20...Nd4 (20...b6 21.Qb4 Bd4 22.Bd4=) 21.Bd4+= b6 22.Bf6 Qf6 23.Qc3 d4 24.Qd4 Qd4 25.ed4 a6 (25...Re7 26.Rac1+=) 26.ba6 (26.Kf1 ab5 27.Rc7 b4+=) 26...Re7 (26...Kf8 27.Bf3 Ra6 28.g3 Bd3 29.Rc7 Ra2 30.Rac1=) 27.Rac1 (27.d5+=) 27...Ra6 (27...Kf8!?+=) 28.Rc7+/– Rc7 29.Rc7 The mate threat is Rc8 29...Kf8 30.Rc2 Ra3 31.Rd2 (31.Kf1 Ke7+/–) 31...Ke7 32.f3 (32.f4 Bf5+/–) 32...Kd6 (32...f5 33.Rb2+/–) 33.Rb2 (33.Kf2 Kd5 34.Ke3 Ra7+/–) 33...Kc7 (33...Kd5 34.Kf2 Bd3 35.Bd3 Rd3 36.Rb6 Rd2 37.Kg3 Rd4 38.Rb7+/–) 34.d5 (34.f4 f6+/–) 34...Bd3 35.d6 Kd7 36.Bd3 Rd3 37.Rb6 Rd1 38.Kf2 Rd2 39.Kg3 Ra2 40.Rb7 Ke6 41.f4 Rd2 42.f5 Kf6 43.Rd7 Rd5 ½–½. Hildingstam,Stefan – Deneuville,Christian, corr or01–012 E–mail, 2002.

5.Be2 Nf6 6.0–0 g6 (6...a6 7.ba6 ba6 8.d4=) 7.c4 dc4 8.Bc4 Nd6 9.Be2 Bg7 (9...a6 10.ba6 b6 11.Bb2+=) 10.d4 0–0 11.Nc3 Bd7 12.Ba3 Rc8 13.Rc1 c6 14.Qa4 cb5 15.Qa7 Ra8 (15...Nc4 16.Bc5+=) 16.Qc5+/– Qa5 17.Bb4 Qa6 (17...b6 18.Qd6 (worse is 18.Ba5 bc5 19.dc5 Ra5 20.cd6 ed6=) 18...ed6 19.Ba5 Ra5 20.Rb1+=) 18.a4 Qc6 19.ab5 Qc5 20.dc5 Nc8 (20...Nf5 21.e4 Nh6 22.e5+–) 21.Ne5 (21.Rfd1 h6+–) 21...Be6 (21...Bf5 22.c6 bc6 23.Nc6+–) 22.Bf3 White plans c6 (22.c6 bc6 23.Nc6 Re8+–) 22...Rb8 (better is 22...Nd5!? 23.Nd5 Be5+–) 23.c6 White launches an attack 23...bc6 24.Nc6 White creates threats along the open c–file 24...Rb7 25.Nd4 Rc7 (25...Rb6 26.Na4 Rb8 27.Nc5+–) 26.Ne6 fe6 27.Ne2 Rc1 28.Rc1 (28.Nc1?! Nd6+–) 28...Nd5 29.Bd5 (29.Bc5 Kf7+–) 29...ed5 30.Nf4 Nd6 (30...Nb6 31.Be7 Ra8 32.Bc5+–) 31.b6 (31.Bd6 ed6 32.Nd5 Ra8+–) 31...d4 32.Bd6 (32.Ne6 Rb8 33.Bd6 ed6+–) 32...ed6 33.b7 With the decisive threat Rc8 33...Be5 34.Nd3 de3 35.fe3 (35.fe3 Kg7 36.Rc8 Rc8 37.bc8Q+–) 1–0. Rohde,Friedhelm – Frenzel,Lothar, corr SOK–92–86, 1992.

4.Nf3 e6

5.Bb2 f6 6.e4 Nd6 7.Bd3 e5 (7...Be7 8.Nc3+–) 8.Nc3 Ne7 9.0–0 c5 10.Qe2 g6 11.Bc4 (11.Qe3 Qc7+–) 11...Bg7 (11...Nc4!? 12.Qc4 d6+–) 12.Bb3+– a5 (12...Qc7 13.Nd5 Nd5 14.Bd5+– (worse 14.ed5 c4–/+)) 13.ba6! ba6 (13...Ra6 14.Rab1 Combination; 13...ba6 14.Na4 Combination) 14.Ba3 Qc7 15.Qe3 Nb7 16.Nd5 Nd5 17.Bd5 (17.ed5?! d6 18.d4 Bd7+=) 17...h5 (better 17...Rb8+–) 18.Nh4 Rb8 (18...g5 19.Nf5 d6 20.Rab1+–) 19.Ng6 Bh6 (19...Rh6 20.Qg3 d6+–) 20.Qf3 (20.Nh8?! Be3 21.fe3 Qa5+=) 20...Bg7 (20...Rh7 21.Qf6 Qd6+–) 21.Nh8 Bh8 22.Qh5 Ke7 (22...Kd8 23.Qh8 Ke7 24.Qg7 Ke8 25.Qf7 Kd8 26.Qf8) 23.Qf7 Kd8 24.Qf8 1–0. GuestGHVY – GuestTYRT, freechess.org, 2020.

5.Bb2 f6 6.e4+– Nfh6 7.Bc4 (7.Nc3 Bb4+–) 7...Bb4 8.a3 Bc5 (8...Ba5 9.Nc3+–) 9.d4 Bb6 10.d5 Ng4 (better 10...Nf7!?+–) 11.0–0+– d6 (11...Ne7 12.h3 Nh6 13.de6 de6 14.Qd8 Kd8 15.e5 fe5 16.Be5+–) 12.de6 Ne7 (12...Qe7 13.Bd5 Be6 14.Bb7+–) 13.Nh4 h5 (13...Ne5 14.Be5 de5 15.Qg4+–) 14.h3 Ne5 15.Be5 fe5 (15...de5 16.Qe2 c6+–) 16.Qf3 g5 (16...Be6 17.Be6 Rf8 18.Qh5 g6+–) 17.Qf7 1–0. DEFFM – GuestNGPQ, freechess.org, 2019.

5.Bb2 Nf6= 6.Be2 (6.Bd3 d5+=) 6...d5 7.c4 Be7 8.Qc2 b6 (better 8...0–0!?=) 9.cd5+– ed5 (9...Nd5? 10.e4 Nf4 11.ef5+–) 10.Bd3 Nd6 11.Nd4 (11.Ne5 0–0+–) 11...Bd7 (11...0–0!?+=) 12.Nc6+– Bc6 13.Qc6 (13.bc6?! 0–0+=) 13...Kf8 14.0–0 g6 (14...Rc8 15.Be5+–) 15.f4+– Rb8 (15...Qe8 16.Qc7 Nb5 17.Qe5+–) 16.Nc3 (16.Be5 Rg8+–) 16...Nb7 17.Nd5 (better 17.Na4+–) 17...Rg8?? (17...Nd5 18.f5 f6+–) 18.Ne7+– Qe7 19.Bf6 Nd6 (19...Qc5 20.Qe4 Qd6+–) 20.Be7 Ke7 21.Qc7 Kf6 22.Qd6 Kg7 23.Qe5 (23.Qe5 f6 24.Qe7 Kh8 25.Qf6 Rg7 26.f5 Rbg8 27.fg6 hg6 28.Rf4 Rc8 29.Rh4 Kg8 30.Rf1 Re8 31.Bc4 Re6 32.Qd8) 1–0. DEFFM – GuestJDMB, freechess.org, 2019.

5.Be2 b6 (5...Nf6 6.0–0=) 6.Bb2 (6.e4 Nh4 7.0–0 Bb7+=) 6...Bb7 (6...a6 7.Nc3=) 7.0–0+= Bd6 (7...Nf6 8.c4+=) 8.d3 (better 8.c4+=) 8...Bf3? (better 8...f6+=) 9.Bf3+– (9.gf3 a6 10.a4 ab5 11.ab5 Ra1 12.Ba1 Nh4–/+) 9...Rb8 (9...e5 10.Ba8 Qa8 11.Nd2+–) 10.e4 Nd4 (10...Ngh6 11.ef5 Nf5 12.Be4+–) 11.Bd4 e5 (11...Qg5 12.Bb2+–) 12.Bb2 Nf6 (12...Qe7 13.a4+–) 13.Nd2 Qe7 14.Nc4 Bc5 (14...Qe6 15.Nd6 cd6 16.d4+–) 15.Be5 d6 (15...Qd8 16.d4 Be7 17.Ne3+–) 16.Bb2 White plans e5 (better 16.Bc3 Qe6+–) 16...Qd7 (16...0–0 17.d4 Qe6 18.Qd3+–) 17.e5 de5 (17...Ne4 18.ed6 Nf2 19.Qe2 Kf8+–) 18.Bc6 Rd8 19.Ne5 Ke7 20.Nd7 Nd7 21.Qg4 Nf6 22.Qg7 Rhg8 (22...Ng4 23.Rae1 Be3 24.Re3 Ne3 25.Qf6 Kf8 26.Qd8) 23.Qf6 (23.Qf6 Kf8 24.Qd8) 1–0. DEFFM – REDDHIOS, freechess.org, 2020.

5.e4 g5?? (better is 5...Nh4=) 6.ef5+– Bg7 7.d4 g4 8.Ne5 Be5 (8...ef5 9.Bc4 d5 10.Be2+–) 9.de5 h5 (9...ef5 10.Bc4+–) 10.fe6 Qe7 (10...fe6 11.h3+–) 11.ef7 Qf7 12.Nc3 Qe7 (12...Ne7 13.Qd4+–) 13.Nd5 Qe5 14.Qe2 Qe2 15.Be2 Kd8 (15...Kf7 16.Nc7 Rb8+–) 16.Bg5 Ke8 17.Nc7 Kf7 18.Na8 d5 (18...Kg6 19.Bh4+–) 19.Nc7 Nh6 (19...Kg6 20.Bh4+–) 20.0–0–0 Bf5 21.Rd5 Be4 22.Re5 Bg2 23.Rd1 Bf3 24.Bc4 (24.Rd7 Kg6 25.Bd3 Nf5 26.Bh4 Bd5 27.Nd5 Re8 28.Bf5 Kh6 29.Rh7) 24...Kg6 (24...Bd5 25.Rdd5 Re8 26.Ne8 Kg8 27.Rd7 Nf7 28.Bf7 Kh7 29.Bd5 Kg6 30.Be4) 25.Rd6 Kg7 26.Re7 Nf7 27.Rf7 Kg8 28.Rd8 1–0. pierre – golozol, chess.com, 2007.

4.Nf3 Nf6

5.Bb2 Ne4 6.Bd3 d5 7.0–0 e6 8.Nc3 Qf6? (better 8...Nc5+–) 9.Nd5!+– Qd8 (9...ed5 10.Bf6 Discovered attack) 10.Nc7! (10.Be4?! ed5 11.Bd3 Bd6+–) 10...Qc7 11.Be4 Bd7 12.a4 Rd8 (12...Bd6 13.c4!+–) 13.Bd3 h5 (13...Be7 14.Bf5 ef5 15.Bg7+–) 14.e4 Nd6 15.Ne5 h4 16.Qg4 Bc8 17.Bc3 (17.a5 h3 18.gh3 a6+–) 17...Qc5 18.Be2 g5 (18...Rh6 19.Rfe1 f6+–) 19.Nd3 Qc4 (19...e5 20.Nc5 Bg4 21.Bg4+–) 20.Bh8 Ne4 (20...Be7 21.Bc3 Qe4 22.Qh5+–) 21.Ne5 (21.Ne5 Qb4 22.c3 Nc3 23.dc3 Qg4 24.Bg4+–) 1–0. DEFFM – inemuri, freechess.org, 2019.

5.Bb2 e6!?=.

5.Bd3 d6 6.0–0 =.

5.Bd3 Nd6 6.Nc3 e6 7.e4 Ng8 8.0–0 a6 9.ba6 ba6 10.e5 Nb7 11.Rb1 Nc5 12.Bc4 c6 13.d4 Nb7 14.Bd3 d5 15.Na4 Rb8 16.Bd2 (16.Ba6?! Qa5 17.Bb7 Rb7 18.Rb7 Bb7+/–) 16...Na5 (16...Ne7+–) 17.Rb8 (17.Rb8 Qc7 18.Rc8 Qc8 19.Ba5+–) 1–0. b4_player – bambi, casual, 2013.

5.Bd3 d6 6.e4+= Nh6 7.Bb2 (7.Nc3 Bg4+=) 7...Bg4 (7...e5 8.Nc3=) 8.h3+= Bd7 9.Nc3 c6 (9...e6 10.0–0+=) 10.e5 (10.g4 d5+=) 10...de5 (10...Nh5 11.g3+=) 11.Ne5 c5 (11...e6!?+=) 12.g4 g5 13.Qf3 Qc8 (13...Bg7!?+–) 14.Ne4+– Bg7 (14...Rg8 15.Nf6 ef6 16.Qf6+– (16.Nd7?! Qd7 17.Bf6 Be7+–)) 15.Ng5 Be6? (15...Qc7 16.Nd7 Kd7 17.Nh7 Nh5+–) 16.Ne6 fe6 (16...Qe6 17.Bc4 Qc8+–) 17.g5 Nf5 (17...Qc7 18.gh6 Bh6 19.Rd1+–) 18.gf6 (18.gf6 ef6 19.Qh5 Kd8 20.Nf7 Kc7 21.Nh8+–) 1–0. pierred – mic, net–chess.com, 2017.

5.Bd3 Nh6 6.Ba3 (6.Bb2 d5+=) 6...c6 (6...d6 7.0–0=) 7.Nc3 (7.0–0 d5+=) 7...a6 (7...d5 8.bc6 bc6 9.Ne5+=) 8.bc6 (8.ba6 b5+=) 8...dc6 9.Rb1 b5 10.0–0 Bg4 11.h3 Bh5 (11...Bf5 12.Bf5 Nf5 13.e4+=) 12.g4+/– Nhg4 13.hg4 Bg4 14.Be2 h5 15.Ne5 Qc7 (15...Be2 16.Qe2 Qc7 17.Qf3+/–) 16.d4 (16.Ng4 hg4 17.f4 gf3 18.Bd6 Qd6 19.Rf3 Qh2 20.Kf1 Qh1 21.Kf2 Rh2 22.Kg3 Qg2 23.Kf4 Qg4 24.Ke5 Nd7) 16...Bh3 (16...Be2 17.Qe2 h4 18.Qf3+/–) 17.Bf3+/– Bg4 (17...Bd7 18.Nd7 Nd7 19.Kg2+/– (19.Bh5? g6–+)) 18.Kg2 (18.Ng4? hg4 19.Re1 gf3 20.Qf3 Rd8–+; 18.Nc6?! Rc8 19.d5 Bf3 20.Qf3 Nd5 21.Qd5 Qc6=; worse is 18.Bc6 Qc6 19.Nc6 Bd1 20.Rfd1 Rc8+/–) 18...Bf3 19.Qf3 Rc8 (19...h4!?+/–) 20.Ne4+– Ne4 (20...e6 21.Bf8 (21.Nf6?! gf6 22.Bf8 fe5+/–) 21...Ne4 22.Qe4 Rf8 23.c4+–) 21.Qf7 (21.Qe4?! g6+/–) 21...Kd8 22.Qe6 Qd6 (22...Ng5 23.Qf5 h4+–) 23.Bd6 1–0. marre – clegkyy, internet, 2010.

5.d4 d5 6.Ba3 Bd7 (6...Nd6 7.Bd3=) 7.Bd3 Nd6 8.Bd6 ed6 9.0–0 Be7 10.a4 0–0 11.c4 dc4 12.Bc4 Be6 (12...d5 13.Bd3=) 13.d5+= Bf5 14.Nc3 Ne4 15.Ne4 (15.Qd3 Ng3 16.e4 Nf1 17.ef5 Nh2 18.Kh2 Bf6+=) 15...Be4 16.Rc1 (16.Bd3 Bd3 17.Qd3 Bf6+=) 16...Bf6 17.Nd2 (17.Bd3 Bd3 18.Qd3 a6+=) 17...Bg6= 18.Bb3 (better is 18.e4!?=) 18...Bb2–/+ 19.e4 (19.Rc4!? Bd3 20.Bc2 Bf1 21.Qf1–/+) 19...Bc1–+ 20.Qc1 a6 21.Qc4 ab5 22.ab5 Qe7 23.Rc1 Rfc8 24.b6 c6 25.dc6 (better is 25.Qd3–+) 25...Rc6 (25...bc6?! 26.Qc3–/+) 26.Qf1 Rb6 (better is 26...Rc1!? 27.Qc1 Be4 28.h3–+) 27.Bd5 h6 28.f3 Kh7 29.Nc4 Rb4 30.Qe1 Rb5 31.Qg3 Rc5 32.Rd1 Rd8 (32...Qc7 33.Ne3–+) 33.Nb6? (33.Nd2–+) 33...Qc7 34.Na4 Rc1 (34...Rc2!? 35.Bb3 b5 36.Bc2 Qc2 37.Rd6 Rd6 38.Qd6 ba4 39.h4–+) 35.Qe1 Rd1 36.Qd1 b5 37.Nb2 Qc5 38.Kf1 f5 39.Nd3 Qd4 40.Qb1 (40.Nf2 Qd1 41.Nd1 fe4 42.fe4 Rf8 43.Ke1–+) 40...fe4 41.fe4 (41.Nf4 Rc8 42.Ng6 Qd5–+ (worse is 42...Kg6 43.Be4 Kf6 44.Qe1–+)) 41...Be4 (better is 41...Rf8 42.Ke1 Qe3 43.Kd1 Rf1 44.Kc2 Qe2 45.Kc3 Rb1–+) 42.Be4 g6 (42...g6 43.Nf4 Rf8=; worse is 42...Qe4 43.Qb5 Re8 44.h4–+) 0–1. sagaz (2370) – vitorluiz (2350), net–chess.com, 2007.

5.Be2 e6 6.0–0 d5 7.d4 Be7 =.

4.g4 Nd6

5.Bb2 a6 =.

5.Bb2 e6 6.c4 (6.Nc3 Nf6=) 6...Qg5 (6...h5 7.gh5 Nf6 8.Nc3=) 7.h4 (7.Nf3 Qe7+=) 7...Qg6 (7...Qd8 8.d3 c6 9.a4+=) 8.h5 Qg5 9.f4 Qd8 (9...Qe7 10.h6 f6 11.c5+=) 10.c5 (10.h6 f6 11.hg7 Bg7+=) 10...Ne4 11.h6 gh6?? (11...f6 12.Qc2 Nh6 13.Qe4 Bc5+–) 12.Bh8+– 1–0. Wall,Bill – GeekBeek, internet, 1999.

5.c4 c6 6.a4 cb5 (6...e6 7.d3 b6 8.Bg2=) 7.ab5+= Qb6? (7...h5 8.gh5 Nf6 9.Bb2+=) 8.Qb3 (8.Nc3!? Nf6 9.g5+–) 8...a6 (8...Ne4 9.d4=) 9.Bb2 (better 9.d4 Ne4 10.Bd3+=) 9...ab5?? (better 9...Ne4+=) 10.Ra8+– Qc7 (10...Qc6 11.f3 bc4+–) 11.cb5 e6 12.b6 Qc6 13.f3 Be7 (13...Ne7 14.Nc3 h5 15.Ba3 hg4 16.Nb5 Nb5 17.Bb5+–) 14.h4 (better 14.Bg7 Bf6 15.Bh8 Bh8+–) 14...Nf6 15.Bb5! Qc5 (15...Qb5 16.Qb5 Combination; 15...Nb5 16.Rc8 Pinning) 16.Ra5 (better 16.g5!? Nd5 17.Bg7 Nb6 18.Rc8 Nbc8 19.Bd7 Kd7 20.Bh8 Qc4+–) 16...0–0 (16...Qb6 17.Ra8 0–0 18.Ba4+–) 17.Ne2 (better 17.Bd4 Qc1 18.Qd1 Qd1 19.Kd1 Nb5 20.Rb5 d6+–) 17...Qb6 18.Bc3 Nb5 (18...Nd5 19.Ba4 Qc7 20.Ra7+–) 19.Rb5 Qc6 (19...Qd8 20.g5 Nh5 21.d4+–) 20.Nd4 (20.e4!? Qc7+–) 20...Qc7 21.Rg1 (21.Rh3 d5+–) 21...Nd5 (21...Qh2 22.Ne2 Qh4 23.Kd1+–) 22.Bb2 (22.h5!? b6 23.h6 Qh2+–) 22...Bh4 23.Ke2?? (23.Kd1 Qh2 24.Rf1 b6+–) 23...b6?? (23...Qh2 24.Kd3 Qg1 25.Nc3 Qf1 26.Nce2–+) 24.e4?? (better 24.Rh1 Qg3 25.Kd1+–) 24...Ba6?? (better 24...Qh2 25.Kd3 Qg1–+) 25.d3?? (25.Rh1 Bb5 26.Qb5 Nf4 27.Kd1 Bf6+–) 25...Nf4 (25...Qh2 26.Rg2 Qg2 27.Kd1 Ne3 28.Kc1 Qf1 29.Kd2 Qe1) 26.Ke3 (better 26.Kd1 Nh3 27.Rg2 Bb5 28.Qb5 (28.Nb5?! Qf4 29.Nd2 Qe3=) 28...Nf2 29.Kd2+–) 26...Bg5?? (26...e5 27.Nf5 Bb5 28.Nh4 Nd3 29.Qb5 Nb2+=) 27.Kf2 (better 27.Rg5 f6 28.Nb5+–) 27...Nh3 (27...Bh4 28.Ke3 Bg5 29.Rg5 f6+–) 28.Kg2+= Ng1? (28...Be3 29.Rd1 Nf4 30.Kf1 Nd5 31.ed5 Qh2=+) 29.Kg1?? (better 29.Rg5 g6 30.Kg1+–) 29...Be3 (better 29...Qg3 30.Kf1 Be3 31.Ke2 Qf2 32.Kd1–+) 30.Kf1?? (better 30.Kg2 Bb5 31.Nb5=+) 30...Qh2 31.Qc2 (31.Ke1 Rc8 32.Qc3 Rc3 33.Bc3 Qf2 34.Kd1 Qf1 35.Be1 Qd3 36.Nd2 Qd4 37.Rb3 Qa1 38.Nb1–+) 31...Qg1 32.Ke2 Bd4 (32...Qf2 33.Kd1 Qf1) 33.Rb6 (33.Bd4 Qg2 34.Bf2 Bb5 35.Qb3–+) 33...Bb6 34.Qd1 (34.Qd2–+) 34...Qe3 (34...Qf2) 35.Kf1 Bd3 (35...Qf2) 36.Kg2 Be2 (36...Qf2 37.Kh1 Bf1 38.Qf1 Qf1 39.Kh2 Bg1 40.Kg3 Qf2 41.Kf4 Qh2 42.Kg5 h6) 37.Qe1 Qf3 (37...Bf3 38.Kh2 Qe1 39.Bd4 Qh4 40.Kg1 Bd4 41.Kf1 Qf2) 38.Kh2 Bc7 (38...Bf2 39.Be5 Be1 40.Nd2 Qf2 41.Kh1 Bd2 42.Bg7 Bf3) 39.Kg1 Qg4 40.Kf2 (40.Qg3 Qg3 41.Kh1 Bf3) 40...Bb6 41.Bd4 Bd4 0–1. afsharian – land1977 (1620), lichess.org, 2018.

5.d4 a6 6.ba6 ba6 7.Bg2 c6 8.Nc3 Rb8 9.e4 (time, 1–0). marus – beyls, internet, 2001.

5.d4 a6 6.Nc3 =.

5.d4 c6 6.c4 (6.a4 Nf6=) 6...cb5+= 7.c5 (7.cb5 Nb5 8.Bb5 Qa5 9.Nc3 Qc3 10.Bd2 Qa3+=) 7...Nc4 8.e4 (8.a4 Qa5 9.Bd2 Nd2 10.Nd2 ba4 11.Ra4 Qd8=) 8...d5–/+ 9.cd6 Qd6 10.Nc3 Bg4 (better is 10...a6 11.Nd5 e5+=) 11.Qg4+/– (11.Qg4 Qd4 12.Nge2+/–) 1–0. Trkn – monkey_x, itsyourturn.com, 2001.

2.b5 Ne5

3.Bb2 a6?? 4.Be5+– f6 (4...ab5 5.e4+–) 5.Bb2 (5.Bc3 ab5 6.e3 c6+–) 5...ab5 6.Nc3 (6.e4!? b4+–) 6...b4 7.Nd5 (better is 7.Nb1+–) 7...c5 (better is 7...e6 8.Nf4 e5+–) 8.e3 (8.e4 Nh6+–) 8...e6 9.Nf4 g5?? (9...Nh6 10.a3+–) 10.Nh5 (better is 10.Qh5 Ke7 11.Ng6 hg6 12.Qh8+–) 10...d6 (10...d5 11.Bb5 Ke7 12.a4+–) 11.Ng3 (11.Bb5 Kf7+–) 11...b5 (11...Qd7 12.Qh5 Kd8 13.d4 cd4 14.Bd4+–) 12.Qh5 (12.Bb5 Ke7+–) 12...Kd7 (12...Ke7 13.Nf3 e5 14.Bb5+–) 13.Bb5 Kc7 (13...Ke7 14.Nf3 e5 15.a4+–) 14.Qf7 (14.Ne4 e5+–) 14...Kb6 (14...Qe7 15.Qe7 Be7+– (15...Ne7?? 16.Bf6 Rg8 17.Nf3+–)) 15.c4 (15.Be2 Ra7 16.Qh5 Kc7+–) 15...d5?? (better is 15...bc3 16.Bc3 Kb5+/–) 16.a4 (16.a3 Ra7 17.Qh5 e5+–) 16...dc4 (16...Qe7 17.Qe7 Be7 18.cd5 ed5 19.Nf3+–) 17.Ne4 (17.Bc4 Qe7 18.Qh5 Kc7+–) 17...Bb7 (17...Qe7 18.Qh5 Bb7 19.f3+–) 18.Nf6 Nf6 (18...Qe7 19.Nd7 (19.Ng8?? Qf7 20.Bh8 Qg8–+) 19...Ka7 20.Qe7 Ne7 21.f3+– (worse is 21.Nc5 c3 22.dc3 Bg2+–)) 19.Bf6 Be7 (19...Qc7 20.a5 Ra5 21.Qc7 Kc7 22.Ra5 (22.Bh8?! Rb5 23.f3 Kd6+–) 22...Bg2 23.Bc4+– (worse is 23.Bh8 Kb6+–)) 20.Bh8 (better is 20.Be7!? Qd5 21.f3 Bc6 22.Bc6 Kc6+–) 20...Qh8 (20...Bg2 21.Be5 (21.Qe6 Qd6 22.Qe5 Rh8 23.Qh8 Bf6 24.Qh7 Ba1+–) 21...Bh1 22.Qe6 Ka5 23.Bc4+–) 21.Qe6 (21.Qe7?! Qa1 22.Ke2 Bg2 23.Qd6 Kb7 24.Qd7 Kb6 25.Qd6 Kb7 26.Qe7 Kb6 27.Qd6=) 21...Ka5 (21...Ka7 22.Rc1 Qf6 23.Qh3+– (23.Qc4?! Bg2 24.d4 Rf8+–)) 22.Rb1 (22.Qe7 Qa1 23.Ke2 Kb6 24.Qd6 Ka7 25.Qc5 Kb8 26.Qb4 g4+–) 22...Bf8 (22...Qf6 23.Qd7 Bg2 24.Qc7 Qb6 25.Qe7 Bh1 26.Rc1+–) 23.Nf3 Ra6 (23...Bf3 24.gf3 Qg7 25.Bc4 Ra7+–) 24.Ba6 Ba6 25.0–0 (better is 25.Ne5 b3 26.Nd7+–) 25...Ka4 (25...Bg7 26.Qe7 Kb6+–) 26.Ra1 (26.Qa6) 26...Kb3 27.Qa6 Kc2 (27...Qa1 28.Ra1 Kc2 29.Qc4 Kb2 30.Qa2) 28.Qa2 (28.Qc4 Qc3 29.Ra2) 28...Kd3 29.Ne1 (29.Qb1 Ke2 30.Re1) 29...Ke4+– 30.Qc4 Kf5 31.Qe4 (31.Qf7 Qf6 32.g4 Kg4 33.f3 Kf5 34.e4 Ke5 35.Nd3 Kd6 36.Ra6) 31...Ke4+/– 32.f3 (32.d3 Kd5 33.Ra6+–) 32...Kf5? (32...Kd5 33.Nd3+=) 33.e4?? (33.Ra6 Ke5 34.f4 Kd5 35.fg5+–) 33...Kf4?? (better is 33...Ke6 34.Ra6 Bd6=) 34.Nd3 1–0. magicalverman – wizzreefer, Yahoo! Chess Game, 2000.

3.Bb2 b6 4.Be5 d6 5.Bg3 e5 6.Nc3 Nf6 7.e4 d5 (7...Be7 8.Nf3+–) 8.Be5 (8.ed5 Bd6+–) 8...de4 9.Bc4 Bc5 10.Qe2 (better is 10.Bf6 Qf6 11.Ne4 Qe5+–) 10...Bd4 (10...Bb7 11.Rd1+–) 11.Bf6 Bf6 12.Qe4 Be6 (12...Qe7 13.Qe7 Be7 14.Bd5+–) 13.Nf3 (13.Be6 0–0 14.Nge2 fe6 15.Qe6 Kh8+–) 13...a6 (13...0–0 14.Be6 Re8 15.0–0 Re6 16.Qb7+–) 14.0–0 ab5 15.Bb5 (15.Be6 fe6 16.Nb5 Kf7+–) 15...Ke7 (15...Kf8 16.Bc6 Ra5 17.Rfe1+–) 16.Qb4 (16.Bc4!? Bc3 17.dc3 Qd7+–) 16...c5 (16...Qd6 17.Qb1+–) 17.Qe4 Qb8 (17...Kf8 18.Rfe1+–) 18.Nd5 Kd8 (18...Kf8 19.Nf6 gf6 20.d4+–) 19.Nb6! Ra5 (19...Qb6 20.Qc6 Double attack (20.Qa8 Discovered attack; 20.Qa8 Deflection; 20.Qc6 Decoy; 20.Qa8 Overloading)) 20.Qc6 Qc7 21.Rab1 Ba2 22.Qc7 (22.Nd5 Qc6 23.Bc6 Bb1 24.Rb1 Kc8+–) 22...Kc7 23.Nc4 (23.Bc4!? Bb1 24.Nd5 Kc6 25.Rb1 Ra1 26.Ra1 Ba1+–) 23...Raa8 24.Rbd1?? (24.Ne3 Rhb8+–) 24...Rab8?? (better is 24...Rhb8+=) 25.Na3+– Ra8 26.Nc4 g5?? (better is 26...Rab8=) 27.d4 (27.Nce5 Be6 28.Bc4 Bc4 29.Nc4 Rhd8+–) 27...Rab8? (27...Rhb8 28.Ne3 cd4+–) 28.Na3 g4 29.Ne5 Rhg8 (29...cd4 30.Rfe1+–) 30.Bc4 (better is 30.Nd7 Bd4 31.Nb8 Kb8 32.c4+–) 30...h5 (30...cd4 31.f4 gf3 32.Nf3 Bc4 33.Nc4 Rbd8+–) 31.Ba2 Ra8 (31...cd4 32.f4 gf3 33.Nf3+–) 32.Nb5 Kb6 33.Bc4 (better is 33.Bd5 Be5 34.de5 Ra4+–) 33...h4 (33...Rgd8 34.Nf7 Rf8 35.dc5 Kc5 36.Nbd6+–) 34.Nd7 (better is 34.dc5 Kc5 35.Rd5 Kb6 36.Rd6 Kb7 37.Rf6+–) 34...Ka5 35.Nf6 (35.Ra1 Kb4 36.Rfb1 Kc4 37.Nb6) 35...Rg6 36.Nd7 (36.Nd5 Ka6 37.Ndc7 Kb7 38.Bd5 Kc8 39.Ba8 c4 40.Bd5 Rg7 41.Bc4 Kd7 42.Ra1 Rg6 43.Ra7 Ke7 44.Re1 Kf6 45.Bf7 Kg5 46.Bg6 g3 47.Ne6 Kg6 48.Rg7 Kh5 49.Re5 Kh6 50.Nd6 gh2 51.Kh2 h3 52.Nf7) 36...f5 37.Ra1 (37.c3 Ka6 38.Nd6 Ka5 39.Ra1) 37...Kb4+– 38.Ra8 Kc4 39.Rb8 (39.Ne5 Kd5 40.Rd8 Ke6 41.Rd6 Ke7 42.Ng6 Kf7 43.Re1 Kg7 44.Re7 Kh6 45.Nh4 Kh5 46.Rg6 Kh4 47.Rh7) 39...cd4 40.Na3 (better is 40.Rc8 Kd5 41.Re1 Rc6 42.Re5 Kc4 43.Rc6 Kb4 44.Nd4 Ka4 45.Rb5 f4 46.Ra6) 40...Kc3 41.Rd1 Rd6 (41...Rb6 42.Rb6 d3 43.Rd3) 42.Rb3 1–0. gtate (1750) – caffine, net–chess.com, 2001.

3.Bb2 Nf6?? 4.Be5+– e6 5.Nf3 Ne4 6.d3 Nc5 7.e4 d6 8.Bb2 d5 9.ed5 ed5 10.Be2 Na4 (10...Bd6 11.0–0+–) 11.Bd4 Qe7 12.0–0 Bf5 13.Re1 Qe6 (13...Be6+–) 14.Bf1 Bb4 (14...Be4 15.c4 Nc5 16.cd5 Qd5 17.de4+–) 15.Re6 Be6 16.c3 Bd6 17.Qa4 0–0 18.Nbd2 Rae8 19.c4 dc4 20.dc4 Bf4 21.c5 Bd2 22.Nd2 Bg4 23.f3 (23.Qa7 Rb8+–) 23...Bf5 24.Qb3 (24.Qa7!? Rd8 25.Bc3 Bc8+–) 24...Rd8 25.Qb2 Rfe8 26.Bg7 Re3 27.Bh6 (27.Bh6 Rc3 28.Qc3 Rd4 29.Qd4 f6 30.Qf6 a5 31.Qg7) 1–0. Fournier,Frederic – andy2000, Active, 2005.

3.Bb2 Ng4 4.e3 g5?? 5.Qg4 (better 5.Bh8 N4f6+–) 5...f6 (5...Nf6 6.Qg5 h6+–) 6.Qh5 1–0. DEFFM – GuestQNTK, freechess.org, 2016.

3.Nc3 e6 4.h3 (4.Rb1 d5=) 4...c5 (4...d5 5.e3+=) 5.h4 (5.e4 Nf6=) 5...c4 6.f3 (6.e4 d5=) 6...Ng6 7.h5 Bc5?? (better is 7...Qc7 8.e3 N6e7=) 8.hg6+– Qh4?? (8...fg6 9.e3 d5+–) 9.Rh4 Bd6 10.Rc4 (better is 10.Ne4 Bg3 11.Ng3 fg6 12.Rc4+–) 10...Bg3 0–1. Medhurst,Tiffany – Callaway,Joshua, Worksop College Inter–House Teams, 2006.

3.d4 f6?? 4.de5+– fe5 5.e4 (5.Nd2 Nf6+–) 5...Nf6 6.f4 (6.Nf3 e6+–) 6...d6 (6...e6 7.Bd3+–) 7.fe5 Ne4 8.Bd3 Nc5 (8...Bf5 9.Qh5 Bg6 10.Qg4+–) 9.Qh5 Kd7 10.Bh7 a6 (10...e6 11.Nf3+–) 11.Bf5 e6 12.Be6! Ne6 (12...Ke6 13.Qh8) 13.Qh8 Be7 (13...de5 14.Bd2+–) 14.Qd8 Kd8 15.ed6 cd6 (15...Bd6 16.ba6 Ra6 17.Nf3+–) 16.Bb2 (16.ba6 Bf6 17.c3 Ra6+–) 16...g6 (16...ab5 17.Ne2+–) 17.ba6 Ra6 (17...ba6 18.Nd2+–) 18.Nc3 (18.Nf3 b5+–) 18...Nd4 (18...Bh4 19.Kd1+–) 19.0–0–0 Bg5 (19...Nf5 20.Re1+–) 20.Kb1 Nf5 21.Nf3 Bf4 (21...Bf6 22.Rhe1+–) 22.Nd5 Bh6 23.Bf6 (23.Rhe1 Bf8+–) 23...Kd7 24.Rhe1 Kc6 (24...Bf8 25.Ng5 b5 26.g4+–) 25.Nb4 Kb5 26.Na6 ba6 27.Rd3 Kc6 (27...Ne3 28.Rb3 Kc6 29.Rc3 Kb7 30.Rce3 Be3 31.Re3+–) 28.g4 a5 (28...Ne3 29.g5 Bg5 30.Rc3 Kd7 31.Bg5+–) 29.Rc3 Kb7 30.gf5 gf5 31.Re7 Kb6 (31...Bd7 32.Rd7 Ka6 33.Nd4 a4 34.Bd8 Bg7 35.Rc6) 32.Rc8 (32.Nd4 a4 33.Rc6 Ka5 34.Ra7 Ba6 35.a3 Bg7 36.Rca6) 32...Ka6 (32...Be3 33.Nd4 Bd4 34.Bd4 Kb5 35.Rb7 Ka6 36.Rb3 f4 37.Ra8) 33.Rc6 (33.Nd4 a4 34.Rc6 Ka5 35.a3 Bg7 36.Ra7) 33...Kb5 34.Nd4 Kb4 35.Rb7 1–0. Johannes,Jan – Schmidt,Eberhard, corr TKM/A002, 1999.

3.e3 b6 4.Bb2 Bb7?? 5.Be5+– 1–0. DEFFM – GuestQJJV, freechess.org, 2016.

3.e3 c5 4.c4 d6 5.Be2 Be6 (5...d5 6.cd5 Qd5 7.Nf3=) 6.d3 Nh6 7.Bf3 (7.Nf3 a6 8.ba6 Ra6+=) 7...Bf5 (7...d5 8.cd5 Bd5 9.e4–/+) 8.Nc3 (better is 8.Bb7 Rb8 9.e4 Rb7 10.Bh6 gh6 11.ef5+=) 8...Qa5–/+ 9.Bb7? (9.Bd2 Nd3 10.Kf1+=) 9...Rb8–+ 10.Bc6 Bd7?? (better is 10...Nc6 11.Nge2 Ne5–+) 11.Bd5?? (11.Bd7!? Nd7 12.Bd2+/–) 11...Bg4 (better is 11...Qc3 12.Bd2 Qd3 13.Qa4–+) 12.Bf3?? (12.Qd2!?+/–) 12...Bf5 (better is 12...Bf3!? 13.Nf3 Qc3 14.Bd2 Nd3 15.Kf1 Qc4 16.Qb3 Qb5 17.Qb5 Rb5 18.Ke2–+) 13.Be2?? (13.Bc6 Nc6 14.Nge2–+) 13...Qc3–+ 14.Bd2 Qa3 (14...Nd3 15.Bd3 Qd3 16.Qa4–+) 15.Nf3? (15.e4 Nd3 16.Bd3 Qd3 17.ef5 Qe4 18.Ne2 Qg2–/+) 15...Nf3 (better is 15...Nd3 16.Bd3 Bd3–+) 16.Bf3 Bd3 17.Bc6 Kd8 18.Bc1?? (18.Qb3 Qb3 19.ab3=) 18...Qc3–+ 19.Bd2 Qc4 20.Ba5 Kc8 21.Rc1 Qa2 22.Bc3 Bf5 (better is 22...Bb5 23.Bd5 Qa4 24.Qd2–+) 23.0–0 Qe6?? (better is 23...Bg4 24.f3 Bf5–+) 24.Qa4+– Bd3?? (24...Rb7 25.Qa6 Qd7 26.Bd7 Bd7+–) 25.Rfd1 (25.Qa6 Kc7 26.Ba5 Rb6 27.Qa7 Kc8 28.Bb6 Bf1 29.Qb7) 25...Be2?? (25...Bb5 26.Bb5 Rb5 27.Qb5+/–) 26.Rd2 (26.Qa6 Kc7 27.Ba5 Rb6 28.Qa7 Kc8 29.Bb6 Bd1 30.Qb7) 26...Bg4?? (better is 26...Bb5 27.Bb5 Rb5 28.Qb5 Qd7 29.Qa6 Qb7+/–) 27.Qa6 Kd8 (27...Kc7 28.Ba5 Rb6 29.Qa7 Kc8 30.Bb6 Qe3 31.Qb7) 28.Ba5 Rb6 29.Qa7 Qc8 (29...Kc8 30.Bb6 Qe3 31.Qb7) 30.Bb6 1–0. Mphilliber – kiwi phill, ChessWorld.net, 2011.

3.e3 c6 4.d4 Ng6 5.Nf3 cb5= 6.Bd3 Nf6 7.0–0 d5 (7...a6 8.a4 b4 9.c3=) 8.Bb5 Bd7 9.a4 a6 (9...e6 10.Nbd2=) 10.Bd3+= a5 (10...e6 11.Nbd2+=) 11.c4 Qc7 (11...e6 12.Qb3+–) 12.Na3 (better 12.Nbd2+–) 12...Ng4? (12...e5 13.Bg6 hg6 14.de5 Ng4+–) 13.h3+– Nf6 14.cd5 h5?? (better 14...Nd5 15.Nb5 Qb6+–) 15.Nb5 Qb6 16.e4 Bb5 (16...0–0–0+–) 17.Bb5 Kd8 (17...Nd7 18.Qb3 Ra6 19.Ng5+–) 18.Ng5 Rh7 (18...Rg8 19.Nf7 Kc8 20.Ne5+–) 19.Nf7 Kc7 (19...Kc8 20.Qf3 Nh4 21.Qf4 Ng2 22.Kg2+–) 20.Be3 (better 20.Qf3 e5 21.de5+–) 20...Ne4 (20...Kb8+–) 21.Qc2 Kb8 22.Qe4 Ka7 23.d6! e6 (23...ed6 24.Qg6 Decoy (24.Qg6 Interception)) 24.d5 Qe3 25.Qe3 Kb8 26.Qe6 Nf4 (26...Ne5 27.Qe5 Ka7 28.Qd4 b6 29.Qf4 g5 30.Qf5 Rb8 31.Qh7 Rb7 32.Bc6 h4 33.Bb7 b5 34.Bc8 Kb8 35.Nh8 Bg7 36.Qg7 Kc8 37.Qc7) 27.Qe8 Ka7 28.Qe3 b6 29.Qf4 g5 (29...Rc8 30.d7 Rc6 31.d8Q Bd6 32.Qd7 Rc7 33.Qc7 Bc7 34.Qc7 Ka8 35.Bc6) 30.Qf5 Bd6 (30...Rb8 31.Qh7 Rb7 32.Bc6 Rd7 33.Bd7 g4 34.Nd8 Be7 35.Nc6 Kb7 36.Bc8 Kc8 37.Qe7 gh3 38.Qc7) 31.Qd7 Kb8 32.Qd6 Ka7 (32...Kb7 33.Qc6 Kb8 34.Qb6 Kc8 35.Rfc1) 33.Qc7 1–0. DEFFM – GuestGQQW, freechess.org, 2020.

3.e3 h5 4.Bb2+= d6 5.d4 Ng4 (5...Ng6 6.Nf3+–) 6.h3 Nf2?? (better 6...N4f6+–) 7.Kf2+– e6 (7...Nf6 8.Nc3+–) 8.Nf3 b6 (8...Be7 9.Nc3+–) 9.c4 Bb7 10.Be2 (10.Nc3 Nf6+–) 10...Nf6 11.Rf1 (better 11.Nc3 h4+–) 11...Ne4 12.Kg1 g5 (12...Ng3 13.Re1 g5+–) 13.d5 g4 (13...Rh6 14.de6 fe6+–) 14.Bh8 gh3 (14...Bh6 15.Bd4 e5 16.Nc3+–) 15.gh3 Ng3 16.de6 fe6 17.Rf2 Bf3 (17...Bh6 18.Kh2 Nf5+–) 18.Bf3 Rb8 19.Bc6 Ke7 20.Bf6 (20.Bf6 Kf7 21.Bd8 Kg8 22.Qf3 Rd8 23.Qg3 Kh8 24.Qg6 Bh6 25.Qh6 Kg8 26.Be4 d5 27.Qh7) 1–0. GuestCMGY – GuestSMSH, freechess.org, 2019.

3.e4 a6 4.ba6 (4.d4 Ng6+=) 4...ba6 5.d4 Nc6 (5...Ng6 6.h4 e6 7.h5+=) 6.c3 (6.Nf3 d5 7.ed5 Qd5+=) 6...Nf6 (6...e5 7.d5 Nce7 8.Nf3+=) 7.Bd3 Bb7 8.Nf3 Na5 (8...e6 9.0–0+=) 9.Nbd2 g6 (9...e6 10.Rb1+/–) 10.0–0 Bh6 (10...Bg7 11.Rb1+/–) 11.Re1 (11.Nb3 Nb3 12.Qb3 Bc1 13.Qb7 Rb8 14.Qa6 Bb2+/–) 11...Bd2 (11...Rb8 12.Qe2+/–) 12.Qd2 (12.Bd2 Rb8+–) 12...d5 13.e5 (13.ed5 Bd5 14.Qe2 e6+–) 13...Ne4+/– 14.Qc2 f5 (14...c5 15.e6 fe6 16.Bh6+/–) 15.Ng5 (15.ef6 Nf6 16.Bg6 hg6 17.Qg6 Kd7 18.Qf5 Ke8 19.Qf6 Rg8+–) 15...Ng5 (15...Qd7 16.f3 Ng5 17.Bg5+/–) 16.Bg5 Qd7 17.Rab1 Rb8 (17...c5!?+–) 18.Ba6 Qc8?? (18...0–0 19.e6 Qd6+–) 19.Qa4 c6 (19...Kf7 20.Qa5 Ba6 21.Rb8 Qb8 22.Qd5 Kg7 23.Qe6+–) 20.Qa5 Ba6 (20...h6 21.Qb4 hg5 22.Bb7+–) 21.Rb8 Qb8 22.Qa6 Kd7 (22...0–0 23.Qc6 Qc8 24.Qd5 e6 25.Qd6+–) 23.Qa3 Re8 24.h3 (24.e6 Kd8 25.Qa6+–) 24...Qa8 (24...Ke6 25.c4 dc4+–) 25.e6 Kc7 26.Bf4 Kb7 27.Rb1 Kc8 28.Qa8 1–0. Kinski,A – Haufe,P, Berlin–ch U15, 1997.

3.e4 d6 4.Bb2 Nf6 5.d4 Ned7 (5...Ng6 6.Nc3=) 6.Bd3 (6.e5 Nd5+=) 6...e5 7.Nf3 d5 (7...ed4 8.Nd4 Nc5 9.Nc3=) 8.de5 (8.Qe2 Bb4 9.c3 de4 10.Be4 Be7+=) 8...de4+= (8...Ne4 9.0–0=) 9.ef6 ef3 10.Qf3 Bb4 (10...Nf6 11.0–0 Be7 12.Nc3+=) 11.Nd2 (11.c3 Ne5 12.Qe4 gf6+=) 11...Bd2+/– (11...Nf6!? 12.0–0–0 0–0+/–) 12.Kd2 Nf6 13.Rhe1 Ne4??+– (13...Be6+/–) 14.Re4 Be6 15.Bg7 (15.h4 Qd5+–) 15...Qg5 16.Rf4 (16.Re3!? Qg7 17.Qb7 Rd8+–) 16...Qg7 17.Re1+/– (17.Qb7!? 0–0 18.Re1+–) 17...Rb8+– (17...0–0–0!?+/–) 18.Bc4 (18.Ra4 Rg8 19.g3 Qg5 20.Re3 Qc5+–) 18...Qh6? (18...0–0+–) 19.Be6 Qe6 (19...fe6 20.Re6 Qe6+–) 20.Re6 fe6 21.Qh3 (21.Qh5 Kd7 22.Rf7 Kc8 23.Qe5 Rd8 24.Ke3 Rd3 25.Kd3 h5 26.Qc7) 21...e5 (21...Rd8 22.Kc1 Rd6 23.Qh5 Kd8+–) 22.Qe6 Kd8 23.Rf7 Rf8 (23...Re8 24.Qd7) 24.Rf8 1–0. Lindberg,Rune – COMP, 1994.

3.e4 e6 4.d4 Ng6 5.Nf3 c6 6.Bd2 cb5 7.Bb5 a6 8.Ba4 (better is 8.Bd3!?+/–) 8...b5+= 9.Bb3 Bb7 10.d5 ed5 (10...Nf6!? 11.Qe2 ed5 12.Bd5 Bd5 13.ed5 Qe7–/+) 11.ed5= Nf6 12.Bg5 (12.0–0 Be7 (worse is 12...Bd5 13.Bd5 Nd5 14.Bg5+=) 13.d6 Bd6 14.Re1 Be7+=) 12...Bd6 13.Nc3 Bb4 14.Qd4 Bc3 15.Qc3 Qe7 16.Be3 (16.Kf1 0–0=) 16...0–0 (16...Nf4 17.Kd1 N4d5 18.Bd5 Bd5 19.Bc5–/+) 17.0–0 (17.Qd4!?=) 17...Nd5–/+ 18.Bd5 Bd5 19.Nd4 Qf6 20.f3 Rac8 21.Qd2 Ne5 22.Bg5 Qb6 23.Kh1 h6?? (23...f6 24.Bf4 Nc4 25.Qd3–/+) 24.Be7?? (better is 24.Nf5 Rfe8 25.Ne7 Re7 26.Be7=) 24...Rfe8–/+ 25.Nf5 Be6 (better is 25...Qg6 26.Qd5 Qf5–+) 26.Nd6+= Rc6?? (better is 26...Nc4 27.Nc8 Nd2 28.Nb6 Nf1–/+ (worse is 28...Re7 29.Rfe1+/–)) 27.Ne8+– Bf5 (27...Nc4 28.Qf4 Rc8 29.Nd6 Nd6 30.Bd6 Rc2 31.Rac1+–) 28.Qf4 Re6 29.Ng7 (better is 29.Qf5 Re7 30.Rae1+–) 29...Kg7 30.Bb4 Bc2 31.Bc3 f6 32.Be5 fe5 33.Qg3 Bg6 34.Rad1 d6 35.Qg4 Re7 36.h4 h5 37.Qg5 Rf7?? (better is 37...Rd7+–) 38.g4 hg4 39.h5 Rf6 40.fg4 (40.hg6?! Qb7 41.Qg4 Rg6+–) 40...Qc6 41.Kh2 Qc2 (41...Re6 42.hg6 Qc2 43.Kg3 Qg6 44.Qh4+–) 42.Rd2 Qd2 43.Qd2 Rf1 44.hg6 Rf6 45.Kg3 Rg6 (45...Kg6 46.Qd5 Kg7 47.Qb7 Kf8 48.Qa6+–) 46.g5 Re6 (46...d5 47.Kg4 Rd6 48.Qf2+–) 47.Qd5 Kf7 (47...Re7 48.Qd6 Rf7 49.Qe5 Kg6 50.Kg4+–) 48.Qb7 (48.Kg4 Ke7 49.Kf5 Rf6 50.gf6 Ke8 51.Qd6 Kf7 52.Qe7 Kg8 53.Qg7) 48...Kg6 (48...Re7 49.Qf3 Kg8 50.Qd5 Kg7 51.Qd6 Rf7 52.Qe5 Kh7+–) 49.Qd7 1–0. gumshoe (2350) – barelenio (1940), net–chess.com, 2014.

3.e4 f6 4.d4+/– Nf7 5.Nf3 d6 (5...e6 6.Bd3+/–) 6.Nc3+– e5 (6...e6!? 7.Bc4+–) 7.Bc4 Qe7 (7...Bg4 8.Be3+–) 8.Be3 (8.0–0 Bg4+–) 8...Be6 (8...f5 9.ef5 Bf5 10.0–0+–) 9.Nd5 Bd5 10.Bd5 (10.ed5?! f5 11.de5 de5+/–) 10...ed4 (10...0–0–0+–) 11.Nd4 Rb8 (11...Nd8 12.0–0+–) 12.0–0 Ngh6 13.f3 (better is 13.c3 Nd8 14.Bh6 gh6+–) 13...Qe5 (13...Qd7+–) 14.Ne6 Qc3 15.Ba7 Ra8 16.Bd4 Qa5 17.b6 (17.Bb7 Rb8 18.Bd5 Nd8 19.Nd8 Rd8 20.Bc6 Kf7 21.Bd5 Ke8+–) 17...c6 18.Nc7 (18.Nc7 Ke7 19.Na8 Qa8 20.Bb3+–) 1–0. marr – vyhodu, internet, 2010.

3.f4 Nc4 4.e3 b6?? (better is 4...d5=) 5.Bc4+– Bb7 6.Nf3 e6 7.Bb2 Nf6 8.Qe2 d5 9.Bd3 Bd6 10.0–0 0–0 11.Nc3 Rc8 12.a4 c6 (12...Bb4 13.Ne5+–) 13.bc6 Bc6 14.Nb5 a6 (14...Bb8 15.Nbd4+–) 15.Nd6 Qd6 16.Ba6 Ra8 17.Ba3 Qd8 18.Ne5 Be8 19.Bf8 (19.Bf8 Kf8 20.Bb5+–) 1–0. pcmvr – crisilva (2105), net–chess.com, 2015.

3.f4 Ng4 4.e4 e6?? (4...d5 5.Be2 N4f6 6.e5=) 5.Bb2?? (better is 5.Qg4 Nf6 6.Qe2+–) 5...Qh4 (5...N4f6 6.Nc3=) 6.g3+= Qh5 7.Be2 Qc5? (better is 7...f5+/–) 8.d4+– (8.Bg4?! Qb4 9.Nc3 Qb2=) 8...Qd6 (8...Qh5 9.Bg4 Qb5 10.Bc3+–) 9.Bg4 a6 (9...Qb4 10.Bc3 Qb5 11.Be2+–) 10.c4 (better is 10.Ba3!? Qb6 11.Bf8 Kf8 12.ba6 Qb2+–) 10...ab5 11.c5 Qa6 12.Be2 Be7 (12...Nf6 13.Nc3 Qa5 14.Qc2+–) 13.Bc3 (13.Nc3 Qa5 14.Bb5 Nf6+–) 13...Nh6 (13...Nf6 14.a4! Ne4 15.ab5 Qa1 16.Ba1 Ra1+–) 14.a4! g6 (14...ba4 15.Ba6 Pinning (15.Ba6 Deflection)) 15.Bb5 (better is 15.ab5!? Qa1 16.Ba1 Ra1+–) 15...Qa7 16.Nf3 Ng4 17.Qe2 Bf6 (17...0–0 18.h3 Nf6 19.g4+–) 18.h3 c6 (18...Nh6 19.a5+–) 19.Na3 (better is 19.hg4!? cb5 20.ab5 Qb8+–) 19...cb5 (19...Nh6 20.Bd3+–) 20.Nb5 (20.Nb5 Qb8 21.Nd6 Kf8 22.hg4+–) 1–0. wlittle (1705) – evandebrake, net–chess.com, 2002.

3.Bb2 Nc4

4.Qc1 Nb2+= 5.Qb2 Nf6 6.Nf3 d6 7.d4 a6 (7...Bg4 8.e3+=) 8.a4 (8.e3 Bg4=) 8...ab5+= 9.ab5 Black creates threats along the open a–file 9...Bf5 10.Ra8 Qa8 11.c4 Qa5 12.Qc3 Qa2 13.Nbd2 Be4 (13...Ne4!? 14.Qc1 Nd2 15.Nd2 Qa5=) 14.e3= e6 15.Be2 (worse is 15.Ne4 Ne4 16.Qc1 Qf2 17.Kd1 Qa2–/+) 15...Be7 (15...Bf5 16.Bd3 Bd3 17.Qd3 Qa1 18.Nb1 Qa5 19.Qc3 Qc3 20.Nc3=) 16.0–0+= (worse is 16.Ne4 Qb1 17.Bd1 Ne4+=) 16...0–0 17.Ra1 Qc2 18.Rc1 (18.Ne4 Qe2 19.Ng3+–) 18...Qc3= 19.Rc3 Ra8 20.Rc1 Ra2 21.Ne4 Ne4 (worse is 21...Re2 22.Nf6 Bf6 23.Ra1+=) 22.Kf1 g5 23.Ke1 (23.Bd3 Nf2 (worse is 23...Rf2 24.Kg1+/–) 24.Rc2 Ra3 25.Bh7 Kh7 26.Kf2 g4=) 23...g4+= 24.Ng1 d5 25.c5 b6 26.f3 gf3 27.gf3 Bh4 (27...Nd2 28.cb6 Bh4 29.Kd1 Nb3 30.Rc2 Ra1 31.Rc1 Rc1) 28.Kf1= Nd2 29.Kg2 Nc4 30.e4 (30.Rc4 dc4 31.cb6 cb6 32.Kh3–+) 30...Bg5–/+ 31.Rc3 (31.Re1!? Be3 32.ed5 ed5 33.Kh3 Bd4 34.Bc4 dc4 35.c6–+) 31...Be3–+ (31...Be3 32.Kh1 Ra1 33.Re3 Ne3 34.cb6 cb6–+) 0–1. Wartig,Wolfgang – Aasum,Anker, corr SOK–90–55, 1991.

4.Bc3 b6 5.e3 (5.e4 Nd6 6.e5 Ne4+=) 5...d5 (5...Nd6 6.Nf3=) 6.Qf3+= Bd7 (6...Na5!?+=) 7.Qd5+/– Be6?? (better is 7...Nd6+/–) 8.Qc6+– Bd7 9.Qc4 e6 (9...a6 10.ba6 c6 11.Qb3+–) 10.Be2 (better is 10.Nf3+–) 10...Bd6 (10...a6 11.ba6 Nf6+–) 11.Bg7 Qg5 (11...a6 12.Nc3+–) 12.Bh8 Be5 (12...0–0–0 13.Qe4 Bb5 14.f4+–) 13.Be5 (better is 13.Qe4!? Bh8 14.Qa8 Qd8 15.Qd8 Kd8+–) 13...Qe5 14.Nc3 Ne7 15.Nf3 Qg7 16.Nd4 (16.Qc7 Nd5 17.Qg3 Qh8+–) 16...Nf5 (16...c5 17.Nf3+–) 17.Bf3 (better is 17.Nf5 ef5 18.Qc7 Qg2+–) 17...Nd6 18.Qc7 e5 19.Qd6 ed4 20.Nd5 Kd8 White now must not overlook the idea f5 21.Nf6 (better is 21.Qe7!? Kc8 22.Nf6 Qf6 23.Qf6 Rb8 24.Qf7 h5+–) 21...Qf6 22.Qf6 Kc7 23.Qf7 (23.Ba8 de3 24.fe3 Kc8 25.Qf7 Bb5 26.Qa7 Bc4 27.Bc6 Ba6 28.Rf1 Bf1 29.Qd7 Kb8 30.Qb7) 23...Rd8 24.Bc6 (better is 24.Qc4 Kb8 25.Qd5+–) 24...de3 25.de3 h6 (25...Rg8 26.Qd7 Kb8 27.Qb7) 26.Rd1 Kb8 (26...Kc8 27.Rd7 Rh8 28.Bb7 Kb8 29.Qf4) 27.Rd7 Rd7 28.Qd7 1–0. Schutz – Tebbe, 1985.

4.Bc3 c6 5.bc6 bc6 6.e4 d5 (6...Nb6 7.Nf3=) 7.e5 (7.Bc4 dc4 8.Nf3 Nf6+/–) 7...e6 8.d3 (8.Bc4 dc4 9.Nf3 Bc5+=) 8...Na5 (8...Nb6 9.Nf3=) 9.Qg4 Rb8 (9...Nb7 10.Nf3=) 10.Be2 (10.Qa4!? Nb7 11.Qa7+/–) 10...Qb6 11.Bd4 (better is 11.Nd2!? Nh6 12.Qa4=) 11...c5–/+ 12.Be3 (better is 12.Bc3 d4 13.Ba5 Qa5 14.Nd2–/+) 12...Qb2–+ 13.Bc5 (13.Qa4 Bd7 14.Qa5 Qa1 15.Qa7 Rb1 16.Kd2 Qe5 17.Nf3–+) 13...Bc5 14.Qg7 Bb4 (14...Qa1 15.Kd2 Qd4 16.Kc1–+) 15.Nd2 Qa1 16.Bd1 Qc1 (better is 16...Bd2 17.Kd2 Nc4 18.dc4 Qd4 19.Ke2 Qc4 20.Kf3 Rb4–+) 17.Ngf3–/+ Bc3 (better is 17...Nc6 18.Qh8 Kf8–/+) 18.0–0?? (18.Qh8 Kf8 19.Qh7–/+) 18...Ne7?? (better is 18...Bd2 19.Qh8 Kf8 20.Qh7 Bc3–+) 19.Qh8 Kd7 20.Qf6? (20.Nb3 Nb3 21.cb3–/+) 20...Ba6 (20...Bd2!? 21.c4 Nac6 22.Ba4–+) 21.Be2? (better is 21.Nb3 Qa3 22.Na5 Qa5 23.Qf7–/+) 21...Qc2–+ 22.Ne1?? (22.Rd1–+) 22...Qd2 23.Bg4 (23.Bh5 Rb1 24.Qf7 Nac6–+) 23...Rb6 (better is 23...Rb4 24.Bh5 Rf4 25.Qh8–+) 24.Nf3 (24.Qf7 Qa2 25.Bh5–+) 24...Qd3 25.Qf4 Qf1 0–1. Taulien,Christian – Fritz,Marco, remoteschach.de, 2001.

4.Bc3 c6 5.bc6 dc6 6.e4 Nd6 7.Bd3 Nh6 8.Nf3 Bg4 9.0–0 e6 10.Na3 f5 (10...f6 11.Nc4=) 11.ef5+= Nhf5 12.h3 Bf3 13.Qf3 Nh4 14.Qe2 Qd7 15.Qh5 Ng6? (better is 15...Nf7 16.Qh4 Ba3 17.Bg7 Rg8 18.Qh7 0–0–0+–) 16.Bg6 hg6 17.Qh8 0–0–0 (17...Nf7 18.Qg8 Nh6 19.Qh7 Ba3 20.Bg7+–) 18.Qh7 (18.Qh4 Be7 19.Qa4 b5+–) 18...Nf5 (18...Ne4 19.Nc4 Nc3 20.dc3+–) 19.Nc4 Qd5 20.Ne3 Ne3 21.fe3 Bc5 22.Qg7 g5 (22...Rd7 23.Qg6 Bd6 24.Rf6+–) 23.Rf7 b5 (23...Rd7+–) 24.Be5 Bd6 25.Ra7 (25.Rc7 Kb8 26.Ra7 Rd7 27.Qd7 Qg2 28.Kg2 Be5 29.Qb7) 25...Be5 (25...Be7 26.Rc7 Kb8 27.Re7 Qe5 28.Qe5 Ka8 29.Qc7 Rd7 30.Re8 Rd8 31.Rd8) 26.Qb7 1–0. Fritz 11 – raj_kr, internet, 2013.

4.Bc3 d6 5.e3 Nb6 6.a4 e5 7.Nf3 Nf6 8.Bb2 Be7 9.c4 c5 10.Qc2 Be6 11.Be2 d5 12.cd5 Nbd5 13.Be5 Nb4 14.Qc3 Nfd5 15.Qb2 f6 16.Bc3 0–0 17.0–0 Nc3 18.Nc3 Nd3 19.Bd3 Qd3 20.Qb1 c4 21.Qd3 cd3 22.Nd4 Bc4 23.f4 Bb4 24.Rfc1 Rac8 25.a5 Rfd8 (25...a6!? 26.Ra4 Bc3 27.Rc3 Bb5+/–) 26.Ra4 Bc3 27.Rc3 (27.dc3?! Bd5=) 27...Bd5 28.Rd3 Rc1 29.Kf2 Be6 30.Rc3 (30.Ne6?! Rd3 31.Ke2 Rd5+/–) 30...Rb1 (30...Rc3 31.dc3 Bd5+–) 31.Ne6 Rd2 32.Kf3 Rb5 33.Rc7 g6 (33...Rbb2 34.Rg7 Kh8+–) 34.Rac4 g5 35.Rg7 1–0. combijack (1740) – cadivi, gameknot.com, 2009.

4.Bc3 d6 5.e4 Nb2?? (better is 5...Nb6=) 6.Bb2+– (6...e5 7.Nf3+–). Christobal (1635) – lachezar, internet, 2005.

4.Bc3 e5 5.e3 Nb6 6.Be5 d6 +/–.

4.Bc3 e5 5.e3+= d6?? (better is 5...d5 6.Bc4 dc4 7.Be5 a6+=) 6.Bc4+– Qg5 (6...Nf6 7.d4 Bg4 8.Be2 Be2 9.Ne2+– (worse is 9.Ke2 e4+–)) 7.Qf3 (7.Nf3 Qg4 8.d3 Nf6+–) 7...Nh6 (7...Nf6 8.d3+–) 8.d4 (better is 8.Ba5+–) 8...Bg4 (8...Qe7+–) 9.Qb7 Rc8 (9...Rd8 10.Nf3 Qf5 11.b6 ab6 12.Bb5 Rd7 13.de5 Bf3 14.gf3+–) 10.Nf3 Bf3 (10...Qf5 11.Bd3 Bf3 12.gf3+–) 11.Qf3 (better is 11.Qc8 Qd8 12.Qd8 (12.gf3?! Qc8 13.Bd5 Qf5=) 12...Kd8 13.gf3+–) 11...Be7 12.de5 (12.Qc6 Kf8+–) 12...de5 13.Nd2 (13.Qc6 Kf8+–) 13...0–0 14.0–0 (14.Ne4 Qg6+–) 14...Bd6 15.Ne4 (15.Rad1 Qh4+–) 15...Qf5 (15...Qg6 16.Rfd1+– (worse is 16.Nd6 cd6 17.Bd3 f5 18.Qd5 Qf7 19.Qd6 Rc3 20.Qe5 Rfc8+–)) 16.Qf5 Nf5 17.Bd3 (17.Bd3 Ne7 18.Rad1+–; 17.Rad1 Ne7+–) 1–0. Istvanny (1610) – Mustapekka, internet, 2007.

4.Bc3 e5 5.e3 Nd6 6.Be5 Nf5 7.Nf3 d6 8.Bb2 c6 9.c4 Ngh6 10.Be2 Ng4 11.Nd4 d5?? 12.Nf5 Bf5 13.Bg4 Be4 14.0–0 dc4 15.bc6 Bc6 16.Bf3 Bd6 17.Bc6 bc6 18.Qa4 Qb6 19.Bc3 Bb8 20.Qc4 0–0 21.Qg4 f6 22.Na3 Qc7 23.g3 Qe7 24.Qc4 Rf7 25.Qc6 Qb7 26.Qb7 Rb7 27.Nc4 Rb5 28.Rab1 Rc5 29.Nb2 Bd6 30.Nd3 Rd5 31.Nf4 Rc5 32.Ne6 Ra5 33.Ba5 Rc8 34.Rb7 h5 35.Rg7 Kh8 36.Ra7 Rg8 37.Bc3 Rg6 38.Ra8 Rg8 39.Bf6 (39…Kh7 40.Ng5 Rg5 41.Bg5+–) 1–0. valpa – akio, playchess.de, 2003.

4.Bc3 e5 5.e3 Qf6?? 6.Bc4+– Qc6 (6...d6+–) 7.bc6 (7.bc6 bc6 8.Be5+–) 1–0. Trkn – dre90, itsyourturn.com, 2000.

4.Bd4 e5 5.Bc3 d5 6.e4 d4 7.Bc4+= dc3 8.Nc3 Qd4 9.Bb3 Bc5 10.Qe2 Bg4 11.Nf3 Bf3 12.Qf3+/– Nf6 13.0–0 Qd2 14.Rad1 Qf4 15.Qf4 ef4 16.Nd5 Ne4 17.Rfe1?? Bf2–/+ 18.Kf1 Be1 19.Re1 f5 20.Nc7 Kd7 21.Na8 Ra8 22.Bd5 Re8 23.c4 b6?? 24.a4?? Re5 25.Rd1 Ke7 26.Rd4 Kf6 27.Ke2 Nc3 28.Kd3?? Nd5 29.cd5=+ Ke7 30.d6 Kd7–/+ 31.Kc4 Re4–+ 32.Re4? fe4 33.Kd4 e3 34.Kd3 Kd6 35.g3 g5 36.h4 fg3 37.Ke3 gh4 38.Kf4 h5 39.Ke4 g2 40.Kf5 h3 41.Kf6 h2 42.Kf5 g1Q 43.Ke4 h1Q 44.Kd3 h4 45.Kc4 h3 46.Kd3 (46...Qf3 47.Kc2 Qgf2 48.Kc1 Qh1#; 46.Kb3 Qe3 47.Ka2 Qg2 48.Kb1 Qe1#). toll (1680) – Nc3_4Me (1730), ICC, 2003.

4.Bc3 d5

5.d3 Nb6 6.a4 (6.e3 a6=) 6...d4+= 7.Bb4 (7.a5 dc3 8.ab6 cb6 9.Nc3 a6+=) 7...Nd5 (7...a6 8.c4+=) 8.Ba3 g6 (8...e5 9.Bf8 Kf8 10.c4 dc3 11.Nf3+=) 9.Nf3= Bg7 10.Nbd2 (10.Bb2!? e5 11.c4 dc3 12.Nc3=) 10...Nc3–/+ 11.Qc1 Bg4 (11...a6 12.Ne4 Na4 13.Be7 Ne7 14.Ra4–/+) 12.h3 (12.Bb2 Nf6+=) 12...Bf3 (12...Be6 13.Bc5–/+) 13.gf3 (13.Nf3 Na4 14.Be7 Ne7 (worse is 14...Ke7 15.Ra4 Qd7 16.Qb2+/–) 15.Ra4 c5+=) 13...Bh6 (13...a6 14.ba6 Ra6 15.Bg2–/+) 14.Bb4 (14.Bb2 e6–/+) 14...Nd5 (14...a5 15.ba6 Ra6 16.a5–/+) 15.Qa3 (15.Ba5 Bg7 16.Ne4 Ngf6+=) 15...Ngf6 16.Bg2 (16.Ne4 e5–/+) 16...0–0 (16...Nf4 17.Bf1–/+) 17.Nc4 (17.Ne4 Bg7+=) 17...Nb4 (17...a6 18.ba6 b6 19.e4–/+) 18.Qb4+= Nd5 19.Qb3 (19.Qc5 Nf4 20.Rg1 Qd7+=) 19...Nc3 (19...Bf4 20.a5–/+) 20.e4 (20.f4!?+=) 20...Bf4–/+ 21.0–0 (21.h4 h5–/+) 21...e5 22.Rfe1 Qe7 23.Kh1 Kg7 24.a5 White prepares b6 (24.Kg1 f5–+) 24...a6 (24...f5 25.ef5 Rf5 26.Ne3–+) 25.b6 c5 (25...Rfc8 26.Qb2–+) 26.Kg1 (26.Rf1 f5–/+) 26...Rac8 (26...Rad8–+) 27.Na3 (better is 27.Ne3!?–/+) 27...Bd2–+ 28.Rf1 Ne2 29.Kh1 Qg5 (29...Ba5!? 30.Nc4 Bc3 31.Ra2–+) 30.Nc4 Nf4 31.Rg1 Bc3 (31...Qh4 32.Kh2 Bc3 33.Rab1–+) 32.Bf1 (32.Rab1 Qh4 33.Rgf1 Nh3 34.Bh3 Qh3 35.Kg1 Qe6–+) 32...Qf6 (better is 32...Qh5 33.Rb1 Nh3–+) 33.Rg3?? (better is 33.Rb1–+) 33...Ba1 34.Rg4 (34.Qa4 Bc3–+) 34...Bc3 35.h4 (35.Kh2 Qe6–+) 35...Rc6 36.Rg5 (36.Kh2 Qe6–+) 36...Re8 (36...Ne6 37.Rg3–+) 37.Kh2 (37.Kg1 Rce6–+) 37...Be1 (37...Ne6 38.Rg4–+) 38.Kg1 Nh3! 39.Bh3 Qf3 40.Ne5 (40.Kh2 Qf4 41.Kh1 Qh4 42.Rg2 Qh3 43.Kg1–+) 40...Re5 (40...Qh3? 41.Qf7 Kh6 42.Ng4 (42.Qe8? Bf2 43.Kf2 Rf6 44.Rf5 gf5–+) 42...Qg4 43.Rg4+–) 41.Re5 (41.Rg2 Qh3 42.Qa2 Qh4–+) 41...Qh3 (41...Bf2 42.Kf1 Be3 43.Ke1 Qf2 44.Kd1 Qd2) 42.Re7 Bf2! 43.Kf2 (43.Kf2 Rf6 Mate attack) 43...Rf6 44.Ke1 (44.Ke2 Qe3 45.Kd1 Rf1) 44...Qf1 0–1. mic (2180) – lsanchez (2220), net–chess.com, 2008.

5.d3 Nb6 6.e3 a6 7.a4 ab5 8.ab5 Ra1 9.Ba1 e6 10.Nf3 Nd7 11.d4 b6 12.Bd3 Ne7 13.0–0 h6 14.Ne5 Ne5 15.de5 Bb7 16.Qf3 Qb8 17.Nd2 Nc8 18.Qg3 g5 19.Nf3 Be7 20.Nd4 Bc5 21.Nc6 Bc6 22.bc6 Ne7 23.Bb5 Qa7 24.Bd4 Bd4 25.ed4 Qa5 26.Bd3 Qc3 27.Be2 Nc6 28.Qc3 Kd7 29.Bh5 1–0. ronnieg (2615) – Hasselino (2565), fics, 2001.

5.d3 Nd6 6.a4 (6.e4?! Nb5 –+) 6...a6!? = (=+). Aasum.

5.e3 a6 6.ba6 Ra6 7.Nf3 Nf6 (7...Bg4 8.h3 Bh5 9.g4=) 8.d3 Nb6 9.Be2 (9.Be5 Bg4=) 9...Bg4 10.0–0 (10.Bf6 ef6 11.Nd4 Bd7=) 10...e6 11.d4 (11.e4 Be7=) 11...Ra7 12.Bb2 (12.Bd2 Bd6=+) 12...Bd6 13.Nbd2=+. Byron_de – Pcmvr, ChessWorld.net, 2003.

5.e3 Nf6 6.Nf3+= Nd6 (6...a6 7.a4 h6 8.ba6+=) 7.Be2 Bg4 (7...Bd7 8.a4=) 8.0–0 (8.Bf6 gf6 9.Nc3 c6=) 8...e6 9.a4 Be7 10.Nd4 (10.Ne5 Be2 11.Qe2 0–0=) 10...Be2 11.Qe2 a6 12.d3 (12.ba6 Ra6 13.d3 c5+=) 12...0–0 (12...ab5 13.Nb5 0–0 14.Nd2=) 13.Nd2 ab5 14.ab5 Qd7 15.Ra8 (15.Rfb1 Ra1 16.Ba1 e5=) 15...Ra8+= 16.Ra1 (16.Rb1!?+=) 16...Ra1–/+ 17.Ba1 Nb5 18.c4 (18.h3 Nd6–/+) 18...Nd4 19.Bd4 Qa4 20.g3 Nd7 (20...c5 21.Bf6 Bf6 22.cd5 ed5 23.e4–/+) 21.cd5 (21.Nf3 c5 22.Bc3 Qb3–/+) 21...ed5 22.Kg2 (22.Qh5 c5 23.Bb2 Qc6–/+) 22...Nf8 (22...c5 23.Bb2 Qc6–/+) 23.Qg4 (23.Nf3!? c5 24.Bc3–/+) 23...Ne6–+ 24.Nf3? (better is 24.Qe2–+) 24...c5 25.Bc3 (25.e4 de4 26.Qe4 cd4 27.Qb7–+) 25...Qg4 26.h3 Qa4 27.Nd2 Qc2 28.Ba5 b6 29.Bb6 Qd2 30.d4 Ng5 31.dc5 (31.Ba5 Qa5 32.h4 Ne4 33.f4 Qd2 34.Kh3 Qe3 35.Kg4 g6 36.dc5 Qg3#) 31...Ne4 32.h4 (32.Bc7 Qf2 33.Kh1 Nd2 34.c6 Nf3 35.Be5 Qh2#) 32...Qf2 33.Kh3 Qg3# 0–1. Neumann,Frank – Pilgram,Kurt, OP–2012–0–02287, 2012.

5.e4 Nb6 6.ed5 Qd5 7.Nf3 =. Aasum.

5.e4 d4? 6.Bc4 –+ (idea 7.Nc3). Aasum.

5.e4 e5 6.Bc4 dc4 7.Qe2 Be6 8.Be5 Nf6 9.Nf3 Bc5 10.Ng5 Qd7 11.Bf6 gf6 12.Ne6 Qe6 13.Nc3 Rg8 14.Qh5 Rg5 15.Qh7 Rg2 16.Qh8 Kd7?? (better is 16...Bf8 17.Qh5 Bd6+/–) 17.Qa8+– Qg4 18.Rf1 Qf3 19.Ne2?? (19.Nd1 Bf2 20.Nf2 Rf2 21.Rf2 Qe4 22.Re2 Qh1 23.Kf2 Qh2 24.Kf3 Qh5 25.Kg3 Qe2 26.Rg1 Qe5 27.Kf2 Qc5 28.Kf1 Qf5 29.Ke2 Qe5 30.Kf3 Qd5 31.Ke2 Qe5 32.Kf1 Qf5 33.Kg2 Qg5 34.Kh2 Qh4 35.Kg2 Qg5 36.Kh1 Qh4 37.Kg2 Qg5=) 19...Rf2 20.Rf2 (20.0–0–0 Ba3 21.Kb1 Rf1 22.Qc8 Kc8 23.c3 Qe4 24.d3 Rd1 25.Kc2 Qe2) 20…Qf2 (20...Qf2 21.Kd1 Qf1) 0–1. nordlicht (1960) – kamerrraad (1995), gameknot.com, 2013.

5.e4 e6 6.ed5 (6.Qe2!? c6!? unclear) 6...ed5 +=. Aasum.

5.e4 Be6 6.ed5 Qd5 = (6...Bd5 unclear). Aasum.

4.Bc3 e6

5.e3 Nb6 =.

5.e3 d5+= 6.Bc4 dc4 7.Qg4 Qd5 (7...e5 8.Qe4=) 8.Bg7 Nh6 (8...h5 9.Qg3 h4 10.Qg4+/–) 9.Bh6+/– Qb5?? (better is 9...Bh6 10.Nc3 Qg5 11.Qg5 Bg5+/–) 10.Bf8+– Rf8 11.Nc3 Qb2 12.Rb1 Qc2 13.Qc4 Bd7 (13...Rg8+–) 14.Rb7 Rc8 (14...Qc1 15.Ke2 c6 16.Qd4+–) 15.Nge2 (15.Ra7 Rg8 16.g4 Qc1 17.Ke2 e5+–) 15...e5 (15...Rg8 16.Rg1+–) 16.Rc7 Be6 (16...Qf5+–) 17.Qc6 Kd8 18.Qd6 Bd7 (18...Ke8 19.Qe7#) 1–0. Woschkat,Karl_Heinz – Vollers,Jens, compuserve, 1996.

5.e4 d5 =.

5.Nf3 d5 6.e4 =.

5.Nf3 Nf6 6.e4 Bc5?? (better is 6...Nb6 7.d3 d6=) 7.d4+– Be7 8.Bc4 d5 (8...Ne4 9.0–0+–) 9.ed5 ed5 10.Bd3 0–0 11.0–0 Qd6 12.Re1 Re8 13.a3 a6 (13...Qb6 14.a4+–) 14.Bb4 Qd7 (14...Qd8 15.ba6 b6 16.Bb5+–) 15.Ne5 Qd8 16.ba6 ba6 17.Nc6 Qd7 (17...Bb4 18.ab4 Qd6 19.Re8 Ne8+–) 18.Ne7 Kh8 19.Nc8 (better is 19.Bf5!? Qd8 20.Nc8 Rc8 21.Bc8 Qc8+–) 19...Qc8 20.Nc3 c6 (20...Re1 21.Qe1 Qd7 22.Qe7+–) 21.Qf3 a5 22.Bd6 Qd8 23.Be5 Re6 (23...Kg8 24.Qf5 Qc8 25.Bf6 Qf5 26.Bf5 gf6 27.Re8 Re8 28.Bd7+–) 24.Qh3 (24.Na4 Re7+–) 24...h6 25.Na4 Nd7 (25...Kg8 26.Nc5 Re8 27.Re3+–) 26.Qf5 (better is 26.Bf5!? Re5 27.de5 Nf8+–) 26...Qg8 27.Nc5 (27.Bc7 Ra7 28.Re6 fe6+–) 27...Nc5 28.dc5 f6 29.Bd6 Re1 (29...Rae8 30.Re6 Re6+–) 30.Re1 a4 White now must not overlook the idea Bf4 31.h3 d4 32.Qg6 Rd8 (32...f5 33.Bf5 Rd8 34.Be5 Rd6 35.Bg7 Qg7 36.Re8 Qf8 37.Rf8) 33.Re7 (33.Be7 Rc8 34.Bf6 gf6 35.Qh6 Qh7 36.Qh7) 33...Rc8 (33...Ra8 34.Bf4 Ra7 35.Ra7 f5 36.Bh6 Qf7 37.Qf7 gh6 38.Qe8) 34.Bc4! Qh7 (34...Qc4 35.Qg7 Mate attack) 35.Re8 Re8 (35...Qg8 36.Bg8 Re8 37.Qh7) 36.Qe8 Qg8 37.Qg8 1–0. Fries,Gerald – Trageser,Benjamin, Unterfranken–ch HT–B, 1996.

4.Bc3 Nf6

5.d3 Nb6!? (5...Nd6 6.a4 Nd5 unclear) 6.e4! d5! 7.e5 Nfd7 8.Nf3 e6 =. Aasum.

5.e3 d5 6.Bc4 dc4 7.Qe2 Qd5!? 8.f3 Qb5?! (8...e5!) 9.Na3! idea 10.Nc4 =. Aasum.

5.e4 Nb6 6.e5 =.

3.Bb2 d6

4.d4 Ng6 5.e3 Nf6 6.Bd3 c6 7.Bg6 (7.Nf3 cb5 8.Bb5 Bd7=) 7...hg6=+ 8.a4 cb5 9.ab5 Bd7 10.d5 (better 10.c4=) 10...Qa5?? (10...Bb5 11.Nd2=+) 11.Bc3 (better 11.Ra5 b6 12.Ra1 Bb5 13.c4+–) 11...Qb5–/+ 12.Nf3 (12.Bf6 gf6 13.Ne2 Bg7–/+) 12...a6 (12...Qd5 13.Bd4–+) 13.Nd4? (better 13.Ra5 Qc4 14.Nfd2–/+) 13...Ne4?? (better 13...Qd5 14.Nf3 Qd1 15.Kd1 Ne4–+) 14.Nb5+– Nc3 (14...Bb5 15.Qf3 Rh4 16.Bd4+–) 15.N1c3 (better 15.N5c3 Rh4+–) 15...Bb5 (15...Rc8+–) 16.Nb5 ab5 (16...Rc8 17.Nd4 Rc7+–) 17.Ra8 Kd7 18.Rf8! Rf8 19.0–0 Rc8 20.Qg4 f5 21.Qh3 (better 21.Qg6 b4+–) 21...Rc5 22.Qh7 b4 23.Qg7 Rc2 24.Qg6 b3 25.Qf5 Kc7 26.Rb1 b2 27.Qc2 Kd7 28.Rb2 b5 (28...Ke8 29.Rb7 Kf7 30.Qf5 Kg7 31.Re7 Kh6 32.Rh7) 29.Rb5 Ke8 30.Qg6 (30.Qf5 Kd8 31.Rb8 Kc7 32.Qc8) 30...Kd7 (30...Kd8 31.Qg8 Kc7 32.Qb8 Kd7 33.Rb7) 31.Ra5 (31.Rb7 Kc8 32.Re7 Kd8 33.Qe8) 31...Kc7 32.Qe6 (32.Qc2 Kb6 33.Ra4 Kb7 34.Qc6 Kb8 35.Ra8) 32...Kb6 33.Ra4 Kb5 (33...Kc7 34.Qe7 Kb8 35.h4 Kc8 36.Ra8) 34.Ra2 (34.Qd7 Kc5 35.Qc6) 34...Kb4 (34...Kc4 35.Qe4 Kb3 36.Qc2 Kb4 37.Ra4 Kb5 38.Qc6) 35.Rb2 (35.Qe4 Kb3 36.Qc2 Kb4 37.Ra4 Kb5 38.Qc6) 35...Kc3 36.Qe5! Kc4 (36...de5 37.g4 Passed pawn) 37.h4 (37.Qd4) 37…Kc5 (37...Kc5 38.Qd4). atif_zubair – Drake_Lyons, lichess.org, 2019.

4.d4 Ng6 5.e4 e5 6.c4 a6 7.Nf3 Bg4 8.d5 Qe7 9.Bd3 Nf6 10.Nbd2 (10.0–0 Nf4=) 10...Qd7 (10...ab5!? 11.Qb3 Nf4=+) 11.a4 Be7 12.0–0 Nh5 (12...Nf4 13.Ra3=) 13.Qb3 0–0–0?? (better is 13...Nhf4=) 14.ba6+– ba6 (14...c5 15.Rab1 ba6 16.Be5 Qc7+–) 15.c5 dc5 16.Ba6 1–0. chessleon – olliemurphy, internet, 2007.

4.e3 b6 5.d4 Ng4 6.Nc3+– Nf2? (better 6...N8f6+–) 7.Kf2+– Nf6 8.Bd3 e6 (8...Bb7 9.Nf3+–) 9.Qf3 e5 (9...d5+–) 10.Qa8 Ng4 11.Ke2 Be7 (11...Be6 12.Qd8 Kd8 13.Nf3+–) 12.Nd5 Bg5 (12...Nf6 13.Nf3 Nd5 14.Qd5+–) 13.Nf3 0–0 14.h3 ed4 15.hg4 c6 16.Bh7 Kh8 17.bc6 Be6 18.Ng5 Bd5 (18...d3 19.Bd3 Kg8 20.Bh7 Kh8 21.Ne6 fe6 22.Bf5 Kg8 23.Be6 Rf7 24.Qd8) 19.Qd8 Rd8 20.Nf7! Bf7 21.Bg6 Kg8 22.Rh8! Kh8 (22...Kh8 23.Bf7 Mate attack) 23.Bf7 Rc8 (23...g6 24.Bd4 Kh7 25.Rh1) 24.Rh1 1–0. Pierre – Libbyby, internet, 2019.

4.e3 b6 5.d4 Ng6 6.h3 Bb7 7.Nd2 h6 8.c4 Nf6 9.d5 Qd7 10.Ngf3 a6 11.ba6 Ba6 12.Bf6 ef6 13.Qb3 Be7 14.Qa3 (14.Nd4 Nh4+=) 14...0–0 15.Qb3 Ne5 16.Ne5 fe5 17.Bd3 Bb7 18.Bb1 f5 19.Nf1 (19.c5 Qe8=) 19...Rfe8 (19...e4 20.a4–/+) 20.Ng3 (better is 20.c5 dc5 21.d6 Kh8 22.de7 Bg2 23.Rg1 Bh3 24.Bd3=) 20...Bf6?? (better is 20...e4 21.Bc2 Bf6–/+) 21.Bf5+/– (worse is 21.Nf5 e4 22.Nd4 Qa4–/+) 21...Qd8 22.e4 Bh4 23.0–0 Bg3 24.Qg3 Qf6 25.Rfe1 Ra4? (25...Bc8 26.Bc8 Rec8 27.Re3+/–) 26.Re3 (better is 26.Bd7 Rea8 27.Ba4 Ra4 28.Rec1+–) 26...Rc4 27.Rf3 Kh8 (better is 27...Qg5!? 28.Qg5 hg5+/–) 28.Bg6 Qe7 29.Rf7 (29.Be8 Qe8 30.Rc3 Rc3 31.Qc3 c6+–) 29...Qd8+/– 30.h4 (better is 30.Bf5!? Qg5 31.Qg5 hg5 32.Bg6+/–) 30...Rf8+= 31.Rg7 (better is 31.Qf3 Rf7 32.Qf7+=) 31...Qf6?? (better is 31...Kg7 32.Bf5 Kh8=) 32.Rh7+– Kg8 33.Bf5 1–0. pittol – alp115, gameknot.com, 2015.

4.e3 c6 5.c4 Nf6 6.a4 (6.d4 Ng6=) 6...a5 (6...Bg4 7.f3 Be6 8.Qc2=) 7.Nf3 (7.d4 Ng6+=) 7...Bg4 8.Be2 Bf3 9.Bf3 (better 9.gf3 e6 10.d4=) 9...Nc4?? (9...Nd3!? 10.Kf1 Nb2–+) 10.Qc2?? (10.Bf6 gf6 11.bc6 d5 12.cb7 Rb8+=) 10...cb5?? (10...Nb2 11.bc6 Rc8 12.Qb2 bc6 13.0–0–/+) 11.ab5?? (better 11.Bf6 ef6 12.Bb7+–) 11...b6?? (better 11...d5=+) 12.Qc4 (12.Ba8!? Qa8 13.Qc4 e5+–) 12...Rc8 13.Bc6 Nd7 14.Nc3 e6 15.Qg4 Qc7 16.0–0 Qa7 (16...h5 17.Qd4+–) 17.f4 (better 17.Ne4 h5 18.Qg5 Rh7+–) 17...Rc6 (17...h5 18.Qg5 Rh7+–) 18.bc6 Nf6 19.Qf3 Qc7 20.Nb5 Qc8 21.c7 Nd5 22.Rac1 a4 (22...Kd7 23.Na7 Qc7 24.Rc7 Kc7 25.Qh5+–) 23.Ba3 (better 23.Na7 Qc7 24.Rc7 f5+–) 23...Be7 (23...Kd7 24.Qe4 Qa6 25.c8Q Qc8 26.Rc8 Kc8 27.Qa4+–) 24.e4 (better 24.Na7 Kd7 25.Nc8 Rc8+–) 24...Nf6 (24...Nc7 25.Bd6 0–0 26.Rc7 Qc7 27.Bc7+–) 25.e5 Nd5 26.ed6 Bh4 27.f5 Bf6 28.fe6 fe6 29.d7! Kd7 (29...Qd7 30.c8Q Pinning; 29...Kd7 30.Qg3 Combination) 30.Qg3 Re8 (30...Qa8 31.Rf6! Qc6 32.Qg7 Ne7 33.Qe7 Kc8 34.Na7 Kb7 35.c8Q) 31.Qd6 1–0. KLINGON09 (1765) – jihyo_park (1715), lichess.org, 2020.

4.e3 Qd7 5.Nf3 Qe6 (5...Nf3 6.Qf3 Qf5 7.Qd1=) 6.Ne5 de5 7.c4 Bd7 8.d4 0–0–0 (8...ed4!? 9.Bd4 Nf6+=) 9.Qa4+/– (9.de5?! Bb5 10.Nd2 Bc6=) 9...Kb8 10.de5 Qb6 (better is 10...c5!?+/–) 11.Bd4+– Qe6?? (better is 11...Qa6 12.Qa6 ba6+–) 12.Qa7 Kc8 13.Qa8 1–0. Fournier,Frederic – Chicot,Patricia, Partie Libre, 2007.

4.e3 Bd7 5.f4 (5.Nf3 Nf3 6.Qf3 c6=) 5...Ng6 (5...Bg4 6.Be2 Nc4 7.Bd4 Be2 8.Qe2+= (worse is 8.Ke2 e5 9.d3 ed4 10.dc4 de3+=)) 6.Nf3 e6 (6...f6 7.Bc4+=) 7.c4 Be7?? (better is 7...Nf6=) 8.Bg7+– Bh4 (8...Nf6 9.Bh8 Nh8 10.d4+–) 9.g3 (9.Nh4!? Qh4 10.g3 Qe7+–) 9...Bf6 10.Bh8 Bh8 11.d4 e5 12.Nc3 c6 13.a4 Nh6 14.Bg2 Bg4 (14...Nf5 15.Qd3+–) 15.Qc2 (15.bc6 bc6 16.h3 Bd7+–) 15...f6 (15...Nf5 16.Qe4 Qa5 17.Rc1+/–) 16.Nd2 (16.bc6 bc6 17.fe5 fe5 18.Ne5 de5 19.Bc6 Bd7 20.Ba8 Qa8+–) 16...f5 (16...Bf5 17.Qb3 Qd7 18.a5+–) 17.bc6 e4 (17...ed4 18.ed4 Bd4 19.cb7 Rb8+–) 18.cb7 Rb8 19.Qb3 (19.h3 Bh5 20.Be4 fe4 21.Qe4 Kd7+–) 19...Nf4 (19...Kf8 20.h3 Bh5 21.Rb1+–) 20.ef4 (20.gf4 Qh4 21.Kf1 Bd4 22.Qb5 Kd8+–) 20...Bd4 21.Rb1 e3 (21...Kf7 22.c5 Kg7 23.c6+–) 22.Nf3 Bf3 23.Bf3 Ng4 (23...Kf8 24.Ne2 Bc5 25.Qc3+–) 24.Bg4 fg4 25.Nd5 (25.Qb5 Kf8 26.Ne4 Bb6 27.Qf5 Kg7+–) 25...Qd7 (25...Qa5 26.Qb4 Rb7 27.Qa5 Rb1 28.Ke2 Rh1 29.Qb5 Kf8 30.Qb8 Kg7 31.Qc7 Kg8 32.Qc8 Kf7 33.Qf5 Kg7 34.Qg4 Kf7 35.Kd3+–) 26.Rd1 (better is 26.Qb5!? Qb5 27.Rb5 Kd7+–) 26...Rb7 27.Qd3 Qe6 (27...Bb2 28.Ne3 Qa4 29.0–0+–) 28.a5 (better is 28.f5 Bc3 29.Nc3+–) 28...Rb2 (28...Bc5+–) 29.Nc7 Ke7 30.Ne6 Bc3 1–0. wlittle (2315) – bobbybellona, net–chess.com, 2003.

4.e3 g6?? 5.f4+– Bg7 6.fe5 de5 7.Nf3 Nf6 (7...Qd6 8.Bc4+–) 8.Be5 c6 (8...Be6 9.Be2+–) 9.bc6 bc6 10.Be2 Kf8 11.0–0 Ne4 12.Bg7 Kg7 13.d3 Nf6 14.Nbd2 Qb6 15.d4 Qc7 16.c4 Ng4 17.h3 (better is 17.Qb3+–) 17...Ne3+/– 18.Qe1 Nf1 19.Qf1 Qd7 20.Ne5?? (better is 20.Nb3 f6 21.Nc5+–) 20...Qd6 (20...Qd4 21.Kh1 A) 21...Qd2? 22.Qf7 Kh6 23.Qe7 Bh3 24.Nf7 Kg7 A1) 25.gh3 Rhe8 26.Qc7 Qe2 (26...Re2 27.Ng5 Kh6 28.Rg1 Qg5 29.Rg5 Kg5 30.a4–/+) 27.Ne5 Kh6 28.Nf7 Kh5 29.Qa5 Kh4 30.Qg5 Kh3 31.Qh6 Kg4 32.Rg1 Kf5 33.Qh3 Kf4 34.Qh4 Kf5 35.Nh6 Ke5=; A2) 25.Nh8?! Kh8 26.Qe5 Kg8 27.gh3 Qd7+–; A3) 25.Nd6 Kh6 26.Rf1+– (26.gh3?! Rhf8+–); B) 21...Qe5–+) 21.Qf7+– Kh6 22.Ng4 (better is 22.Qf4 Kg7 23.c5+–) 22...Kh5 (22...Bg4 23.Qf2 Be2 24.Qe3 Kg7–+) 23.Qg7+– Qd4 24.Qd4 Bg4 25.Bg4 Kh6 26.Nf3 Raf8 27.Qe3 Kg7 28.Qe7 Rf7 29.Qe5 Kg8 30.Be6 Kf8 (30...h6 31.Bf7 Kf7 32.Ng5 hg5 33.Rf1 Kg8 34.Qe7 Rh3 35.Rf8) 31.Bf7 Kf7 (31...h5 32.Rb1 g5 33.Ng5 Rg8 34.Rb8) 32.Ng5 1–0. Fournier,Frederic (1870) – jalance (1645), Active, 2004.

4.e3 Ng6 5.c4 Nf6 6.a4 (6.Bf6 ef6 7.d4 Be7=) 6...e5=+ 7.Nc3 Be7 8.Nf3 0–0 9.Be2 d5 10.d4 ed4 11.Nd4 (11.Qd4 dc4 12.Bc4 Qd4 13.Nd4 Rd8=) 11...dc4 12.Bc4 Bd6 13.h3 Qe7 14.0–0 Ne4 (14...Ne5 15.Nd5 Nd5 16.Bd5+=) 15.Ne4 Qe4 16.Qd3 Qh4 17.Nf3 Qh5 18.Qd5 Qh6 (18...Qd5 19.Bd5 Ne7 20.Be4+=) 19.Qg5 (19.Ng5 Nh8+–) 19...Qg5+= 20.Ng5 h6 21.Ne4 Be5 22.Ba3 Ba1 23.Bf8 Nf8 24.Ra1 Be6 25.Be2 Rd8 26.Nc5 Bc8 27.Rc1 Rd2 28.Bf3 b6 29.Nb3 Ra2 30.Rc7 Be6 31.Nd4 Ra1 32.Kh2 Ra4 33.Bb7 Ra2 34.f4 g6 35.Ba6 (better 35.e4!?+–) 35...Bd5= 36.Kg1 (36.Rc2!? Rc2 37.Nc2=) 36...Rg2–/+ 37.Kf1 Rg3 38.Kf2 Rh3 39.Ra7 Rh2 40.Kg1 Ra2 41.Nc6 Bc4 (41...Kg7 42.Ne5–/+) 42.Rc7 Kg7 43.Ne5 Be6 44.Bb7 Ra7 45.Nc6 Ra1 46.Kf2 Bc4 (better 46...Rc1–/+) 47.Ne5= Be6 (47...Bb3 48.Bc6=) 48.Be4 (better 48.Nf7!? Ra7 49.Nd8 Kh8 50.e4+–) 48...Ra2 49.Kg3 Rb2 50.Bd3 (50.Nf7 Bf7 51.Bd5 Rb5 52.Bf7 Kh8=) 50...Rd2=+ 51.Be4 Rb2 (51...Nd7 52.Nd7 Rd7 53.Rc6=) 52.Bc6= h5 (52...Rb3!? 53.Kf2 Kf6=) 53.Nf7+– Bf7 A pinning theme 54.Bd5 (better 54.Be8! Nh7 55.Rf7 Kh6 56.Bc6+–) 54...Rb5=+ 55.Rf7 Kg8 (55...Kh6!?=+) 56.Bc4 Rb4 57.Bd5 Nh7 58.e4 Rd4 (58...Kh8 59.e5 g5 60.e6 gf4 61.Kh4+– (61.Rf4 Rf4 62.Kf4 Kg7–/+)) 59.Rd7 Kh8 60.e5 (60.Rd8!? Kg7 61.Rg8 Kh6 62.Bf7+=) 60...Nf8= 61.Rd6 (61.Rd8 Kg7=) 61...b5 62.Kf3 b4 (62...Kg7 63.Ke3 Rd1 64.Ke2=) 63.Ke3= Rd1 64.Ke4 (64.Ke2 Rd4 65.Ke3 Rd1=) 64...h4=+ 65.Ra6 (65.e6 h3 66.Ke5 Ne6 67.Re6–+) 65...h3–/+ 66.Ra1?? (better 66.Ra2 Nd7 67.Bc4–/+) 66…Ra1–+ (66...Ra1 67.Ke3 h2–+) 0–1. BeepBeepImAJeep – SwedenMaSu (1870), lichess.org simul, 2017.

4.e4 Nf6 5.Nc3 c6 6.Nf3 Be6 (6...Nf3 7.Qf3 e5 8.Bc4=) 7.Ne5 (7.Ng5 Qc8+=) 7...de5= 8.Be2 Qd4 (8...cb5 9.Bb5 Bd7 10.a4=) 9.0–0 (9.Nd5 Qb2 10.Nc7 Kd8 11.Na8 cb5+/–) 9...0–0–0 (better is 9...Ne4 10.bc6 bc6+=) 10.bc6+– bc6 11.Ba6 Kb8?? (11...Kd7 12.Rb1 Ne4 13.Ne4 Qe4+/–) 12.Rb1 (better is 12.Nd5 Qb2 13.Qb1 Nd5 14.Qb2 Nb6 15.a4+–) 12...c5 (12...Qd7+–) 13.Nb5 (better is 13.Na4 Qe4 14.Nc5+–) 13...Qa4 (13...Qe4 14.Re1 Qe1 15.Qe1 Rd6 16.Be5 Bh3 17.Nd6 Kc7 18.Nb7 Kc6 19.Bb5 Kb7 20.Bd7 Ka6 21.Qe2 c4 22.Qc4 Ka5 23.Bc3) 14.Be5 Rd6 15.Nd6 Kc7 16.Nf7 Kc6 17.Bb5 Qb5 18.Rb5 (better is 18.Nd8 Kd7 19.Rb5 Ba2 20.Rb8+–) 18...Kb5 19.Qb1 Kc6 20.Nh8 (20.Qb8 Bc4 21.Rb1 Bb3 22.Rb3 Kd7 23.Rb7 Ke6 24.Nd8) 20...Ne4 21.Qb8 (21.Qb8 Nd6 22.Qf8+–) 1–0. beyonze1 – Danaan, Live Game Caissa's Web, 2004.

4.e4 Nf6 5.d4 Ng6 6.Nd2 =.

4.e4 Bg4 5.Be2+= Qd7 (5...Be2 6.Ne2 (worse is 6.Ke2 Nc4 7.Bc1 d5+=) 6...e6 7.0–0=) 6.Be5 (better is 6.f4 Be2 7.Qe2+=) 6...0–0–0?? (better is 6...Be2 7.Qe2 de5=) 7.Bg4+– e6 (7...f5 8.Bf5 e6 9.Bh3 de5 10.Nf3+–) 8.Bg3 (8.Bd4 d5 9.a4 de4 10.Ba7 Bd6+–) 8...h5 (8...Qb5 9.Nc3 Qc5 10.Rb1+–) 9.Bh5 Qb5 (9...Nf6 10.Bf3+–) 10.Bf7 Nf6 (10...Qd7 11.Bg8 Rg8 12.Nc3+–) 11.Be6 Nd7 (11...Kb8 12.d3+–) 12.Nc3 Qc6 (12...Qg5 13.Rb1+–) 13.Rb1 Rh6 (13...Qc5 14.Nb5 Kb8 15.Bd5+–) 14.Bd5 Qc5 15.Bb7 (15.Rb5 Qd4 16.Bb7 Kb8+–) 15...Kb8 16.Qe2 (16.Bf4 Rg6+–) 16...Nb6 17.Qa6 Rh5 18.Nge2 (better is 18.Nb5 Qb5 19.Rb5 Rb5 20.Qb5 Kb7+–) 18...Qa5 19.Qa5 (better is 19.Nd4!? Qa6 20.Ba6 Re8+–) 19...Ra5 20.Bd5 g5 21.0–0 (21.Nd4!? Kc8 22.Nc6 Rd5 23.Nd8 Ra5+–) 21...a6 22.Nd4 Kc8 23.Nc6 Nd7 24.Na7 1–0. Trkn – FIREKATT, itsyourturn.com, 2000.

4.Be5?? de5 5.Nf3 e4+= 6.Nd4?? (6.Ng5 Qd5 7.h4 Qe5–/+) 6...e5 (better is 6...Qd4 7.Nc3 Nf6–+) 7.Nb3–/+ Be6 8.e3 f5 9.Be2 Bd6 10.0–0 Nf6 11.a4 0–0 12.c4 f4 13.ef4 ef4 14.d4? (better is 14.Nc3!?–/+) 14...f3!–+ 15.gf3 ef3 (15...Qe8 16.c5 Bf4 17.fe4 Qg6 18.Kh1 Qh6–+) 16.Bd3?? (better is 16.Bf3 Bc4 17.Na5 Bf1 18.Nb7 Bh2 19.Kf1–+) 16...Bh2! 17.Kh2 (17.Kh1 Ne4! 18.Qf3 Rf3 19.N3d2 Rd3 20.Ra3–+) 17...Ng4 (17...Qd6 18.Kg1 Ng4 19.Bh7 Kh8 20.Re1 Qh2 21.Kf1 Qf2) 18.Kg3 (18.Kh3 Ne3 19.Bf5 Bf5 20.Kh2 Qh4 21.Kg1 Qg5 22.Kh2 Qg2) 18...Qg5 0–1. Wolak,Tomasz (1965) – Chojnowski,Marcin (2165), Druzynowe Mistrzostwa Polski Niewidomych Poland, 2008.

4.Nf3 Nd7 5.e4 Ngf6 6.d3 e5 7.Nc3 Be7 8.g3 0–0 9.Bg2 Rb8 10.0–0 Nb6 11.Ne2 Ng4 12.d4 Nc4 13.Bc3 b6 (13...f5 14.de5 de5 15.Qd8 Bd8 16.ef5 Bf5 17.h3=) 14.d5 (14.Qd3 ed4 15.Qd4+/– (15.Qc4?! dc3 16.Nc3 a6=)) 14...f5= 15.ef5 Bf5 (worse is 15...Rf5 16.h3 Nh6 17.Qd3+/–) 16.a4 e4 (better is 16...Qd7=) 17.Nfd4+/– Bg6? (better is 17...Bd7!? 18.Be4 Nf6+–) 18.Ne6 Qd7 19.Nf8 Rf8 20.Bh3 Bf5 21.Bg4 (better is 21.Nd4 Nf2 22.Rf2 (22.Bf5?! Nd1 23.Bd7 Rf1 24.Kf1 Nc3+=) 22...Bh3 23.Rf8 Bf8 24.Qe2+–) 21...Bg4= 22.Qd4 Ne5 23.Qe4?? (better is 23.Qe3+=) 23...Bf5 (better is 23...Nf3 24.Kh1 Ng5–+) 24.Qe3+– Ng6? (better is 24...Bh3 25.Be5 de5 26.Qe5 Bf6+–) 25.Nd4 Bh3 26.Rfe1 Ne5 27.Nc6 (27.f4 Ng6+–) 27...Bf6? (27...Nf3 28.Qf3! Rf3 29.Re7 Qf5 30.Rc7 Qe4 31.Ne7 Kf8 32.Bg7 Ke8 33.Rc8 Kd7 34.Rd8 Kd8 35.Nc6 Kc7 36.Nd4 Rg3 37.hg3 Qg2) 28.Ne5 (28.Na7 Ng4 29.Qe6 Qe6 30.de6 Bc3–+) 28...de5 29.Be5 Qd5 30.Qb3 Qb3 31.cb3 Be5 32.Re5 g6 33.Re7 Rf7 34.Rf7 Kf7 35.Rc1 Ke6 36.Rc7 h5 37.Ra7 Kd6 38.Rg7 Bf5 39.Kf1 (better is 39.b4 Be4+–) 39...Kc5 40.Re7 Kb4 41.Re3 Bh3 42.Ke1 Bf5 43.Kd2 Ka3 (43...Bh3+–) 44.Kc3 Ka2 45.Re8 Bg4 46.Re3 Bd1?? (46...Bf5 47.Rd3 g5+–) 47.Kc4 Ka3 48.Kd5 (better is 48.a5 Bg4 49.b4 Kb2+–) 48...Bb3 (48...Kb4 49.Re4 Kc3 50.a5+–) 49.Rb3! Kb3 50.Kc6 Ka4 51.Kb6 g5 52.Ka6 h4 53.b6 hg3 54.fg3 Kb4 55.b7 (55.b7 Kc5 56.b8Q+–) 1–0. Jokmin,Alex – Bester,Kazimierz, RN–2009–0–00251, 2010.

4.f4 Nc4 (5.Bc3 Bd7+=). Aasum.

4.e3 Nf6

5.c4 Ned7 6.Nf3 (6.Be2 e5 7.Nf3 e4 8.Nd4 Nc5 9.f3 ef3 10.Nf3 a6=) 6...e5 7.d4 Qe7 8.Be2 e4 9.Nfd2 Nb6 10.0–0 Bf5 +=.

5.c4 e6 6.d4 Ned7 (6...Ng6 7.Nf3 Be7 8.Bd3 0–0 9.0–0 a6 10.a4 d5+=) 7.Nf3 a6 8.ba6 b6 9.Bd3 Ba6 10.0–0 d5 =.

5.c4 g6 6.d4+= Ned7 (6...Neg4 7.h3 Nh6 8.g4 Nd7 9.Nf3 Bg7 10.Bg2 e5=) 7.Nf3 Bg7 (7...a6 8.ba6 ba6 9.Nc3 Bg7 10.Bd3 Rb8+=) 8.Qc2 (8.Bd3 a6 9.ba6 ba6 10.Nc3 c5+=) 8...0–0 (8...a6 9.Bd3 0–0 10.0–0 ab5+=) 9.Nbd2 (9.Bd3 Re8 10.0–0 e5+=) 9...c5 (9...Re8 10.Be2 h6+=) 10.Rd1 (10.bc6 bc6 11.Bd3 c5=) 10...a6 (10...cd4=) 11.a4 cd4 12.Bd4 (12.ed4 d5=) 12...Nc5 (12...ab5 13.ab5 Nc5 14.Bc5 dc5 15.Bd3=) 13.Bc5 (13.Bd3 Nd3 14.Qd3 Bg4=) 13...dc5 14.Bd3 Qc7 15.Ne4 (15.0–0 Rd8=) 15...ab5 16.ab5 Ne4 17.Be4 f5 18.Bd3 b6 (18...Qa5 19.Nd2+=) 19.0–0 Bb7 20.Ng5 Rf6 21.f4 (21.e4 h6 22.Nh3 f4=) 21...h6+= 22.Nf3 Re6 23.Nh4 Ra3 24.Rfe1 Qb8 25.Re2 Rd6 26.e4? (better is 26.Ree1–/+) 26...fe4–+ 27.Be4 Rd1 (27...Ra2 28.Bd5 Rd5 29.cd5 Rc2 30.Rc2 Qf4 31.Nf3–+) 28.Qd1 Be4 29.Qd2 (29.Re4 Ra1 30.Qa1 Ba1 31.Ng6–+) 29...Bd4 (29...Bd4 30.Qd4 cd4 31.Re4 Qd6–+) 0–1. Lien,Gaute – Andersen,Alf Roger (2185), Norwegian Open, Oslo NOR, 2005.

5.c4 Ng6 6.Bf6 ef6 7.d4= Be6 8.Nc3 d5 9.Qb3 dc4 10.Bc4 Bc4 +=.

5.d4 Neg4 6.Nd2 (6.h3 Nh6 7.Nf3 d5 8.c4 e6 9.c5 b6 10.c6 Bb4+=) 6...d5 (6...Nh6 7.Bd3 d5 8.e4 de4 9.Ne4 Bf5 10.Qf3 Qc8+=; 6...e6 7.Be2 Nh6 8.Ngf3 Be7 9.0–0 0–0 10.c4 a6+=) 7.Bd3 Nh6 8.e4 de4 9.Ne4 Bf5 10.Qf3 Qc8 +=.

5.d4 Ng6 6.Nd2 e5 7.Bd3 Qe7 8.de5 Ne5 9.Ngf3 Bd7 10.Rb1 Nd3 =.

5.d4 Ng6 6.Bd3 Nh4 (6...a6 7.ba6 ba6 8.Nd2 d5 9.Ngf3 e6 10.Rb1 Rb8+=) 7.g3 Ng6 8.h4 e6 9.h5 Ne7 10.Nf3 d5 =.

5.d4 Ng6 6.Nf3 e6 7.Bd3+= Be7 (7...a6 8.ba6 ba6 9.Nbd2+=) 8.0–0 0–0 9.a4 b6 (9...a6 10.c4+=) 10.c4 (10.a5 ba5 11.Bc3 Qd7=) 10...Bb7 11.Nc3 c5 (11...a6 12.d5+=) 12.dc5 (12.d5 ed5 13.cd5 Ne5+=) 12...dc5= 13.Bg6 hg6 (13...fg6 14.Qe2=) 14.Qe2+= Qc7 15.Rfd1 Rfd8 16.h3 (16.e4 a5+=) 16...Rd1 (16...Ne4 17.a5=) 17.Rd1+= Rd8 18.Rd8 Qd8 19.Nd2 (19.e4 Qb8+=) 19...Bd6= 20.Kf1 (20.f3 Qc7=) 20...Bb8 21.Nf3 a5 22.Nd2 Qd6 (22...g5 23.Ncb1=) 23.g3 (23.Nf3 Ne4=) 23...Qd8 24.Kg1 g5 25.Kf1 Bc7 (25...g4 26.hg4 Ng4 27.Qg4 Qd2 28.Qe2=) 26.Kg1 (26.Nf3 g4 27.hg4 Ng4=+) 26...Nd7 (26...g4 27.hg4 Ng4 28.Qg4 Qd2 29.Qe2 Qe2 30.Ne2–/+) 27.Qd3= Ne5 28.Qd8 Bd8 29.Nce4 (29.e4!?=) 29...Nc4!–/+ 30.Nc4 (30.Nc5 A) 30...Nd2?! 31.Nb7 Nc4 32.Bc1= (worse 32.Nd8 Nb2 33.Nb7 Na4–/+); B) 30...Nb2 31.Nb7 Be7–/+) 30...Be4 31.Bc3 (31.Be5 f6 32.Bc3 Bc7–+) 31...Bf3 32.Nb2 f6 33.Kf1 Kf7 (33...e5 34.Ke1–+) 34.Nc4 e5 0–1. Otto,Norbert – Zonneveld,Will (1620), OP–2011–0–01812, 2011.

5.d4 Ng6 6.Nf3 Bf5 7.d5 e5 8.de6 Be6 9.Bd3 d5 10.0–0 Bd6 =.

5.Be2 Bf5 =.

5.Be2 g6 (5...Ned7 6.Nf3=) 6.f4 Ned7 7.Nf3 Bg7 8.Ng5 0–0 9.0–0 e5 (9...h6 10.Nf3=) 10.f5 (10.fe5 Ne5 (worse 10...de5 11.Ba3+–) 11.Nc3 d5=) 10...Nc5 11.fg6 fg6 12.Bc4 (better 12.Ba3 Bh6 13.Nf3=) 12...Kh8 (better 12...d5 13.Ba3 Bg4=) 13.Nf7+– Rf7 14.Bf7 Qe7 15.Bc4 c6 16.a4 d5 17.Be2 Be6? (better 17...Bf5!?+–) 18.Be5+– Rf8 19.d4 (19.Bd4 Nfe4+–) 19...Nce4 20.Bd3 Ng4 21.Bg7 Kg7 22.Rf8 Qf8 23.Be4?? (23.Qe1 Qd6 24.g3 Bf5+–) 23...de4 (23...Qf2 24.Kh1 Qh4 25.Qg1 Nf2 26.Qf2 Qf2 27.Nc3 de4 28.bc6 bc6 29.Ne4 Qe3 30.Nc5–+) 24.Nd2?? (better 24.Qe1+–) 24...Qf2–+ 25.Kh1 Ne3 (better 25...Qh4!? 26.Qg4 Bg4 27.bc6 bc6 28.Nc4–+) 26.Qg1 Qd2 27.Re1?! (27.bc6 bc6 28.Rb1 a5–+) 27...Nc2 (27...Ng4 28.h3 Nf2 29.Kh2 Qf4 30.g3–+) 28.Re4 Bd5 29.Re7 Kh6 (29...Kf8 30.Re5 Nd4 31.Qf1 Nf5 32.bc6 bc6 33.Re2–+) 30.h3? (better 30.Qf1 Qd4 31.Rb7–+) 30...Nd4 31.Qe3 Qe3 32.Re3 a6 (32...cb5?! 33.Rd3 ba4 34.Rd4–+) 33.Rd3 (33.b6 Nc2 34.Re7 c5–+) 33...Ne2 34.ba6 ba6 35.Kh2 Nf4 36.Rd4 (36.Re3 Ng2 (36...Bg2?! 37.Kg3 g5 38.h4–+) 37.Re7 Nh4–+) 36...Ng2 37.Kg3 Ne1 38.Rh4 Kg7 39.Rd4 Nf3 (better 39...Kf6–+) 40.Rd5 (40.Rb4–+) 40...cd5 41.Kf3 (41.Kf4 g5 42.Ke3 Kf7–+) 41...Kf6 42.Ke3 Ke5 43.Kd3 h5 44.h4 Kf4 45.Kd4 Kg4 46.Kd5 Kh4 47.Kc6 Kg4 48.Kb6 h4 49.Ka6 h3 50.a5 h2 51.Kb6 h1Q 52.a6 Qa8 53.a7 Kf4 (53...Kf4 54.Ka5 Qa7 55.Kb5 g5 56.Kb4 Qd4 57.Ka5 g4 58.Ka6 g3 59.Kb7 g2 60.Kc7 g1Q 61.Kc6 Qg6 62.Kb7 Qgb6 63.Kc8 Qdd8) 0–1. Akrapovik – z3291411 (1620), lichess.org, 2019.

5.Nf3 Bg4 6.Be2 Nf3 7.Bf3 Bf3 8.Qf3 (worse 8.gf3 e6=+) 8...b6? (8...d5 9.Bf6 gf6 10.c4+=) 9.0–0 (9.Bf6 ef6 10.Qc6 Ke7+–) 9...e5 (9...Nd7 10.a4+–) 10.d3 (10.Qc6!? Nd7 11.f4+–) 10...Be7 11.c4 (11.Qc6 Nd7+–) 11...0–0+= 12.a4 a5 13.Nd2 d5? (better 13...Nd7!?+=) 14.Be5+– dc4 15.Nc4 (15.Bf6!? Bf6 16.d4 Qe7+–) 15...Qd3+– 16.Rac1 Rac8 17.Rfd1 Qb3 18.Bf6 (better 18.Qc6!?+–) 18...Bf6= 19.Rd7 Qa4 20.Qc6 Exerts pressure on the backward pawn 20...Rfd8 (20...Rcd8 A) 21.Qc7? Rc8 (21...Qb5?! 22.Nb6 Qg5 23.Rcd1+=) 22.Qb6 Rc4–+; B) 21.Rd8 Rd8 22.h3=+) 21.Rd8 (better 21.Nb6!? Qg4 22.h3+–) 21...Rd8=+ Do you see the mate threat? 22.g3 h5 23.Qc7 Qb5 24.Nb6 a4 25.Nc4 Qa6 26.Ne5 Qe6 27.Nc6 Rc8 (better 27...Rd7 28.Qb8 Kh7=) 28.Qc8! Qc8 Deflection from e7 29.Ne7! A double attack 29...Be7 The mate threat is Qxc1 30.Rc8 Kh7 (30...Bf8 31.e4+–) 31.Ra8 (31.Rc7!? Bd6 32.Rf7 a3+–) 31...a3 32.Ra7 Bc5 33.Ra5 (33.Rf7?? a2 34.Rf5 a1Q 35.Kg2 Qa8 36.Kg1 Bd6 37.Rh5 Kg6–+) 33...Bb4 34.Ra4 (34.Rh5!? Kg6 35.Rh8 Kf6+–) 34...Bc5+– 35.Kf1 Kg6 36.Ke2 Kf6 37.h3 Ke6 38.f4 Kd6 39.e4 Kc6 Black gets in control 40.Kd3 Kb5 41.Ra8 Kb4? (better 41...g6+–) 42.g4?? (better 42.Rb8 Ka5 43.Kc4+–) 42...hg4?? (42...Kb3 43.gh5 a2 44.f5=) 43.hg4?? (better 43.Rb8 Ka5 44.hg4+–) 43...Kb3=+ 44.e5 a2 45.f5 Ba3 46.e6?? (better 46.Rb8 Bb4 47.Ra8–/+) 46...a1Q–+ 47.e7 (47.Ra3 Qa3 48.ef7 Qd6 49.Ke4 Qe7 50.Kf4 Qf7 51.Ke3–+) 47...Qf1 48.Kd4 Qc4 49.Ke5 (49.Ke3 Bc5 50.Kf3 Qd3 51.Kg2 Qe2 52.Kh3 Qf1 53.Kh4 Bf2 54.Kg5 Qc1 55.Kh5 Qh6) 49…f6 0–1. retiponziani (1780) – derby08 (1935), ChessWorld.net, 2010.

5.f4 Ng6 6.Nf3 e6 (6...Bg4 7.h3 Bf5 8.g4 Bc8 9.f5 Ne5 10.Be5 de5+=; 6...d5 7.Bd3 Bg4 8.h3 Bf3 9.Qf3 e6 10.0–0 Be7=) 7.Be2 a6 8.ba6 ba6 9.Nc3 d5 10.0–0 Bd6 =.

5.h3 a6 6.a4 (6.ba6 ba6 7.d4 Ng6=) 6...ab5 (6...Ned7 7.Nf3=) 7.ab5 Ra1 8.Ba1 Be6 (8...Ned7 9.d4=) 9.Nf3 Nf3 10.Qf3 Bd5 11.Qd1 Qa8 (11...e5 12.d4 e4 13.Nc3=) 12.Nc3+= e6 (12...e5 13.Nd5 Nd5 14.Be2+=) 13.Nd5 ed5 (13...Nd5 14.c4 Nb4 15.Bc3+=) 14.c4 (14.Bf6 gf6 15.Bd3 Be7+–) 14...Be7 15.cd5 0–0 16.Bc4 Ne4 (16...c6 17.0–0+–) 17.d3 (17.0–0 Bf6+–) 17...Nc5 (better 17...Qa5!? 18.Ke2 Nc3 19.Bc3 Qc3+–) 18.0–0+– Qc8 (18...Qd8 19.Qg4 Bf6 20.Bf6 Qf6 21.d4+–) 19.Bb2 (19.Bd4 Qf5+–) 19...b6 (19...Qf5 20.Qa1 Re8 21.Bg7 Nd3 22.Bd4+–) 20.Qf3 (20.Qc2 Qf5+–) 20...f5 21.Ra1 Bg5 (21...Bf6 22.Bf6 Rf6 23.d4+–) 22.Qg3 (22.Ra7 Qb8 23.Ra3 Qe8+–) 22...h6 (22...Bf6 23.Bf6 Rf6 24.Qf4+–) 23.d4 (23.Qf3 Qd7+–) 23...Nd7 (better 23...f4 24.ef4 Bf4+–) 24.Qf4?? (24.Qf3 Qe8+–) 24...Kh7 (24...Bf4 25.ef4 Re8 26.Kf1–+) 25.Bd3?? (25.Qf3 g6+–) 25...Rf7 (25...Bf4!? 26.ef4 Nf6 27.Bc4–+) 26.g4?? (better 26.Qf3+–) 26...Kg6 (better 26...Bf4 27.ef4 Qb7–+) 27.Bf5+– (27.Bf5 Kf6 28.Bd7 Bf4 29.Bc8+–) 1–0. DEFFM – GuestGJDS, freechess.org, 2016.

5.h3 Bf5 6.g4 Be6 7.Nc3=.

4.e4 b6

5.d4 Ng4 6.Nf3 (6.Bd3 a6+/–) 6...N8f6 (6...a6 7.Nc3+=) 7.h3+/– Ne4? (better is 7...Nh6!? 8.Nc3 a6+/–) 8.hg4+– Bg4 9.Nc3 (9.d5 e6+–) 9...Nc3 (9...d5 10.Bd3 Ng5 11.Bc1 Bf3 12.gf3+/–) 10.Bc3 Qd7 (10...e6 11.a4+–) 11.Be2 (11.Bd3 e6+–) 11...Bf3 12.Bf3 0–0–0 (12...d5 13.Qd3+–) 13.a4 (better is 13.Bc6 Qe6 14.Qe2+–) 13...g6? (13...d5+–) 14.d5 Rg8 (14...e5 15.de6! Qe6 16.Qe2 Qe2 17.Ke2+–) 15.Rh7 1–0. Wall,Bill – Gangsta, internet, 2002.

5.d4 Ng6

6.Nc3 a6 A) 7.Nf3 Nf6 (7...e6 8.ba6 Ba6 9.Ba6 Ra6 10.0–0 Be7 11.d5 Nf6 12.Nd4 Qd7+=) 8.d5 e5 9.ba6 Be7 10.Bb5 Nd7 11.Bc1 0–0 12.Qe2 Nc5=; B) 7.ba6 Ba6 (7...Nf6 8.d5 Ba6 9.Ba6 Ra6 10.Nge2 e5 11.0–0 Be7 12.Rb1 0–0+=; 7...e6 8.d5 Ba6 9.Ba6 Ra6 10.Nf3 Nf4 11.0–0 Ne7 12.Re1 Neg6+=) 8.Ba6 Ra6 9.Nf3 Nf6 10.d5 e5 11.0–0 Be7 12.Qd3 Ra5+=; C) 7.d5 Nf6 (7...e5 8.ba6 Ba6 9.Ba6 Ra6 10.Qd3 Ra5 11.Nge2 Nf6 12.Rb1 Be7+=; 7...e6 8.ba6 Ba6 9.Ba6 Ra6 10.Nf3 Nf4 11.0–0 Ne7 12.Ne2 Neg6+=) 8.ba6 Ba6 9.Ba6 Ra6 10.Nge2 e5 11.0–0 Be7 12.Rb1 0–0+=.

6.Nc3 e6 A) 7.Nf3 Be7 (7...a6 8.ba6 Ba6 9.Ba6 Ra6 10.0–0 Be7 11.d5 Bf6 12.Qe2 Ra5+=; 7...Nf6 8.Bd3 Nf4 9.0–0 a6 10.Bc4 d5 11.ed5 ed5 12.Re1 Ne6=) 8.Be2 a6 9.ba6 Ba6 10.Ba6 Ra6 11.d5 Bf6 12.Qe2 Ra5=; B) 7.Be2 a6 8.Nf3 Nf4 9.0–0 Nf6 10.Bc4 d5 11.ed5 ed5 12.Re1 Ne6=; C) 7.Bc4 Nf6 (7...a6 8.Nf3 Nf4 9.0–0 d5 10.ed5 ed5 11.Re1 Ne7 12.Bf1 Qd6+=; 7...N8e7 8.Nf3 d5 9.Bd3 a6 10.a4 Nf4 11.0–0 Nd3 12.cd3 ab5+=; 7...Qg5 8.g3 a6 9.Qe2 Qd8 10.ba6 c6 11.Bd3 Nf6 12.d5 Bd7+=) 8.d5 Ne5 9.Be2 a6 10.f4 Ng6 11.de6 fe6 12.e5 de5+=; D) 7.Rb1 Nf6 (7...a6 8.d5 ed5 9.Nd5 N8e7 10.ba6 Ba6 11.Ba6 Ra6 12.a3 Ra5=; 7...d5 8.Nf3 a6 9.Bc1 de4 10.Ne4 Bb7 11.Bd3 ab5 12.Bb5 c6=; 7...Be7 8.Nf3 Nf6 9.Bd3 Nf4 10.0–0 a6 11.a4 0–0 12.Re1 Nd3=) 8.Nf3 Be7 9.Bd3 Nf4 10.0–0 a6 11.a4 0–0 12.Ra1 Bb7=; E) 7.d5 Nf6 8.Nf3 ed5 9.Nd5 Ne4 10.Qe2 f5 11.Nd2 Bb7 12.Ne4 fe4+/–.

6.Nc3 Nf6 A) 7.a4 a6 (7...e6 8.Nf3 d5 9.e5 Ne4 10.Ne4 de4 11.Nd2 Bb7 12.a5 ba5+=; 7...e5 8.a5 ba5 9.de5 Ne5 10.Ra5 c6 11.Ra2 Bd7 12.Nf3 Be7+=; 7...a5 8.Nf3 e6 9.Bd3 Nf4 10.0–0 Be7 11.Qd2 Nd3 12.cd3 0–0+=; 7...Bb7 8.d5 e6 9.Bc4 Ne5 10.Bb3 ed5 11.ed5 a6 12.Nf3 Bc8+=) 8.Nf3 d5 9.ed5 Nd5 10.a5 ba5 11.Nd5 Qd5 12.Ra5 c6=; B) 7.d5 e5 (7...e6 8.Nf3 ed5 9.Nd5 Ne4 10.Qe2 f5 11.Nd2 Bb7 12.Ne4 fe4+/– 1.28) 8.de6 Be6 9.Nf3 d5 10.Nd4 Bb4 11.Nc6 Qd6 12.ed5 Nd5=; C) 7.Nf3 a6 (7...e6 8.Bd3 Nf4 9.0–0 a6 10.Bc4 d5 11.ed5 ed5 12.Re1 Ne6=) 8.d5 e5 9.ba6 Be7 10.Bb5 Nd7 11.Bc1 0–0 12.Qe2 Nc5=.

6.Nd2 a6 A) 7.ba6 e6 (7...Nf6 8.Bb5 Bd7 9.Be2 Nf4 10.Bf1 c6 11.Qf3 Ng6 12.d5 e5+=; 7...Ba6 8.Ba6 Ra6 9.Qe2 Qa8 10.Qc4 c6 11.d5 b5 12.Qb3 Nf4+=; 7...Qd7 8.Ngf3 Nf6 9.d5 e5 10.de6 fe6 11.e5 Ng4 12.ed6 Bd6+=) 8.Bb5 Bd7 9.Bd3 Qg5 10.Bf1 Nf6 11.Ngf3 Qa5 12.c3 Bb5=; B) 7.d5 Qd7 (7...e6 8.ba6 Ba6 9.Ba6 Ra6 10.Qe2 Qa8 11.Qb5 Kd8 12.de6 fe6+=; 7...e5 8.de6 fe6 9.Ngf3 e5 10.a4 ab5 11.ab5 Ra1 12.Ba1 Nh4+=) 8.ba6 e5 9.de6 fe6 10.Ngf3 Ba6 11.Ba6 Ra6 12.Qe2 Ra7=; C) 7.Ngf3 Nf6 (7...e6 8.ba6 N8e7 9.h4 d5 10.h5 Nf4 11.Rh4 de4 12.Ne5 Nfd5+=; 7...Nf4 8.g3 Ng6 9.a4 Nf6 10.a5 ba5 11.Ra5 Rb8 12.h4 e6+=) 8.ba6 d5 9.ed5 Nd5 10.Bb5 Bd7 11.a4 c6 12.Bc4 Bc8+=.

6.Nd2 e6 A) 7.a4 Nf6 (7...d5 8.e5 a6 9.Nh3 c5 10.bc6 N8e7 11.Bd3 Nc6 12.0–0 Be7=; 7...a6 8.a5 ba5 9.Ra5 Rb8 10.Qa1 ab5 11.Bb5 Bd7 12.Bd7 Qd7+=; 7...a5 8.Ngf3 Nf6 9.Bd3 Nf4 10.0–0 Be7 11.Ne1 0–0 12.Qf3 Nd3+=; 7...Bb7 8.Ngf3 Nf6 9.Bd3 Nf4 10.0–0 d5 11.e5 Nd7 12.Ba3 Ba3+=) 8.a5 ba5 9.Ngf3 Bb7 10.Bd3 Nf4 11.0–0 a6 12.Ra5 Nd3=; B) 7.Rb1 Nf6 (7...a6 8.Ngf3 ab5 9.Bb5 Bd7 10.Bc4 Nf6 11.0–0 d5 12.ed5 ed5=; 7...d5 8.Ngf3 a6 9.a4 de4 10.Ne4 Bb7 11.Bd3 ab5 12.ab5 Nf6=; 7...N8e7 8.h4 h5 9.Ngf3 a6 10.a4 d5 11.Bc1 ab5 12.ab5 de4=; 7...Be7 8.Ngf3 a6 9.Ra1 Nf6 10.c4 0–0 11.Qc2 Bb7 12.Bd3 ab5=) 8.Ngf3 a6 9.a4 Be7 10.Bd3 Nf4 11.0–0 Nd3 12.cd3 ab5=; C) 7.Ngf3 d5 (7...Nf6 8.Be2 Bb7 9.e5 Ne4 10.0–0 Nd2 11.Nd2 de5 12.de5 Nh4=; 7...a6 8.ba6 N8e7 9.h4 d5 10.h5 Nf4 11.Rh4 de4 12.Ne5 Nfd5+=; 7...Bb7 8.a4 Nf6 9.Bd3 Nf4 10.0–0 d5 11.e5 Nd7 12.Ba3 Ba3+=) 8.ed5 ed5 9.Be2 Nf6 10.0–0 Bd6 11.a4 0–0 12.Re1 a6=; D) 7.Nh3 e5 (7...a6 8.Qf3 Be7 9.a4 ab5 10.ab5 Ra1 11.Ba1 Bf6 12.Bd3 e5+=) 8.Qf3 Nf6 9.Be2 a6 10.0–0 Bg4 11.Qd3 Be2 12.Qe2 ab5+=.

6.Nd2 Nf6 7.Ngf3 e6 (7...a6 8.ba6 Qd7 9.d5 e5 10.de6 fe6 11.Bf6 gf6 12.Nd4 Ba6+=) 8.Be2 Bb7 9.e5 Ne4 10.0–0 Nd2 11.Nd2 de5 12.de5 Nh4 =.

6.Nf3 a6 A) 7.Nc3 Nf6 (7...e6 8.ba6 Ba6 9.Ba6 Ra6 10.0–0 Be7 11.d5 Bf6 12.Qd3 Ra5+=) 8.d5 e5 9.ba6 Be7 10.Bb5 Nd7 11.Bc1 0–0 12.Qe2 Nc5=; B) 7.d5 e5 (7...e6 8.ba6 Ba6 9.Ba6 Ra6 10.0–0 Nf4 11.Nc3 Ne7 12.Ne2 Neg6+=) 8.ba6 Nf6 9.Nc3 Be7 10.Bb5 Nd7 11.Bc1 0–0 12.Qe2 Nc5=; C) 7.ba6 Nf6 8.Nc3 Ba6 9.Ba6 Ra6 10.d5 e5 11.0–0 Be7 12.Qd3 Ra5+=.

6.Nf3 Nf6 A) 7.Nc3+= e6 (7...a6 8.ba6 Ba6 9.Ba6 Ra6 10.d5 e5 11.0–0 Be7 12.Qd3 Ra5+=) 8.Bd3 Nf4 9.0–0 a6 10.Bc4 d5 11.ed5 ed5 12.Re1 Ne6=; B) 7.Nbd2 e6 (7...a6 8.ba6 Qd7 9.d5 e5 10.de6 fe6 11.Bf6 gf6 12.Nd4 Ba6+=) 8.Be2 Bb7 9.e5 Ne4 10.0–0 Nd2 11.Nd2 de5 12.de5 Nh4=; C) 7.Bd3 a6 (7...Nf4 8.0–0 a6 9.c4 ab5 10.cb5 d5 11.e5 Nd3 12.Qd3 Ne4+=) 8.0–0 Nf4 9.c4 ab5 10.cb5 d5 11.e5 Nd3 12.Qd3 Ne4+=.

6.Nf3 Bg4 7.Be2 (7.h3 Bd7+/– (7...Bc8 8.Bd3 a6 9.0–0 Nf4 10.a4 Nf6 11.c4 Nd3 12.Qd3 e6+=) 8.Bd3 Nf4 9.0–0 Nd3 10.Qd3 a6 11.c4 Nf6 12.Nc3 e6+=; 7.Nbd2 Nf6 8.h3 Bd7 9.e5 Ng8 10.Rb1 de5 11.de5 e6 12.a4 a6+=; 7.Bc4 Nf6 (7...e6 8.h3 d5 9.Bd3 Bf3 10.Qf3 Qf6 11.Qf6 Nf6 12.e5 Nd7+=) 8.h3 Bc8 9.Nc3 a6 10.a4 e6 11.0–0 d5 12.ed5 ed5+=; 7.a3 Nf6 (7...a6 8.ba6 Nf6 9.Nbd2 d5 10.e5 Nd7 11.Bb5 Ra7 12.0–0 e6+/–; 7...Nh4 8.Nbd2 d5 9.h3 Bh5 10.g4 Nf3 11.Qf3 Bg6 12.ed5 Qd7+/– 1.28) 8.h3 Bc8 9.Bd3 a6 10.0–0 Nf4 11.d5 e5 12.de6 fe6+=; 7.c4 Nf6 (7...a6 8.h3 Bf3 9.Qf3 e5 10.Be2 Be7 11.d5 Nh6 12.Nc3 0–0+=; 7...e5 8.h3 Bf3 9.Qf3 Be7 10.d5 Nf6 11.Be2 Nf4 12.0–0 a6+=; 7...e6 8.h3 Bf3 9.Qf3 a6 10.ba6 c6 11.d5 N8e7 12.Qb3 Nf4+/–; 7...Nh4 8.Nbd2 e6 9.h3 Bf3 10.Nf3 d5 11.cd5 ed5 12.Qc2 Nf3+=) 8.h3 Bf3 9.Qf3 e5 10.Bd3 ed4 11.Bd4 Nh4 12.Qg3 Nh5+=) 7...Bc8 (7...Nf4 8.0–0+= Nf6 9.h3 Bc8 10.Nc3 a6 11.a4 e6 12.d5 Be7+=; 7...Nf6 8.h3 Bc8 9.Nbd2 a6 10.ba6 Nf4 11.Bb5 Bd7 12.Bf1 e6+=; 7...a6 8.ba6 Nf6 9.h3 Bc8 10.Bb5 Bd7 11.Bd3 Nf4 12.0–0 e6+=) 8.0–0+/– Qd7 (8...a6 9.Nc3 ab5 10.Bb5 Bd7 11.d5 Nf6 12.Re1 e5+=) 9.Nc3 (9.c4 Nf4+/– 10.Nc3 Qg4 11.Ne1 Ne2 12.Qe2 Qe2+=; 9.Bc4 e6 10.d5 e5 11.Nc3 Nf6 12.Bc1 Be7+=) 9...Nf4 (9...a6 10.d5+/– Nf4 11.Bc4 Qg4 12.Ne1 Qd1+=) 10.g3 (10.Bc4 Qg4 11.Ne1 Nf6+/– 12.Qg4 Bg4+/–) 10...Ng6 (10...Ne2 11.Qe2 (worse is 11.Ne2 Qb5 12.Rb1 Nf6–/+) 11...a6 (11...e6 12.a4 c6+=) 12.a4+= Nf6+=) 11.e5 (better is 11.a4+/– a5 12.Rb1 e6+/–) 11...f5? (better is 11...e6!?+= 12.a4 a6+=; 11...Bb7 12.ed6 Qd6+=) 12.Ng5 (12.e6 Qe6 13.Ng5 Qf6 14.Nh7 Rh7+/–) 12...Bb7 (12...de5 13.Bc4 Nh6 14.Bd5 ed4 15.Ba8 dc3 16.Bc6 (16.Bc3?! Qb5 17.Qf3 Bd7+–) 16...Qc6 17.bc6 cb2 18.Rb1+–) 13.Bf3 (13.e6 Qc8+–) 13...d5 (13...Qc8 14.Bb7 Qb7 15.Qh5+–) 14.e6 Qd6 15.a4 h6 (15...Nh6 16.Ba3 c5 17.Nd5+–) 16.Bh5 (better is 16.Ba3 c5 17.Nf7 Qe6 18.Nh8 Nh8 19.dc5 bc5 20.a5+–) 16...0–0–0?? (better is 16...hg5 17.Bg6 Kd8 18.Bf5 g6+–) 17.Ba3 (17.Bg6?! hg5 18.Bf5 g6+–) 17...c5 18.bc6 (18.bc6 Qc6 19.Nb5+– (19.Bg6?! hg5 20.Qe1 Nh6+/–); 18.Bg6?! hg5 19.Qd3 Nh6 20.Bf5 Nf5 21.Qf5 g6+/–) 1–0. Tiedemann,Joern (1940) – Wloka,Frank, RSX20E – NoEngine–Grossturnier–1, 2010.

3.Bb2 f6

4.c4 Nc4–/+ 5.Qb3 (5.Bc3 d5–/+) 5...d5 6.e3 (better 6.Bc3–/+) 6...e6 (better 6...Nb2!? 7.Qb2 e5–+) 7.Bc4=+ dc4 8.Qc4 Ne7 9.Nf3 Nf5 (9...a6 10.0–0=+) 10.0–0= Bd7 11.a4 Nd6 12.Qg4 (12.Qe2!?=) 12...e5=+ 13.Qh5 g6 14.Qh4 Nf5 (14...h5 15.Qb4=+) 15.Qc4 Nd6 16.Qd5 (16.Qb3 Qe7=) 16...Qe7 (16...c6 17.Qa2 Qe7 18.Nc3=+) 17.Ba3 (17.Qc5 Be6=) 17...0–0–0 (17...c6 18.Qa2=+) 18.Nc3 (18.d4 Qf7 19.Qf7 Nf7=) 18...Be6=+ 19.Bd6 Rd6 20.Qc5 (better 20.Qe4=+) 20...Qd8?? (better 20...Kb8=+) 21.Qa7+– Kd7 (21...c5 22.a5 (22.Qc5?! Kb8 23.Qb4 Rd2+–) 22...Bg4 23.Ne4+–) 22.Qb7 Rb6 (22...Bg7 23.d4+–) 23.Qe4 Bf5 24.Qd5 (24.Qc4 Be6 25.Qe2 Qa8+–) 24...Rd6 25.Qf7 Be7 (25...Kc8 26.Qb3 Bg4 27.Ne4+–) 26.d4 Be6 (26...e4 27.Nd2 Be6 28.Qg7+–) 27.Qg7 e4 (27...ed4 28.Ne4 de3 29.Nd6 ef2 30.Rf2 cd6+–) 28.Ne4 Bf5 (28...Qf8 29.Qf8 Rf8 30.Nd6 Bd6 31.e4+–) 29.Nd6 cd6 (29...Kd6 30.Rfe1+–) 30.Rfe1 g5 (30...d5 31.a5+–) 31.e4 Rg8 32.Qh6 (32.ef5?! Rg7 33.a5 g4=) 32...Bf8 (32...Bg4 33.a5 Qb8 34.e5+–) 33.Qh5 (33.ef5 Bh6 34.g4 Qa5=+) 33...Be6 Black plans g4 (33...Bg6 34.Qg4 Ke7+–) 34.d5 Bf7 35.Qh3 (better 35.Qf7 Be7 36.Rec1+–) 35...g4 36.Qg3 (better 36.Qh7 Ke8 37.e5 de5 38.Ne5 fe5 39.Re5 Be7 40.Rae1+–) 36...gf3 37.Qh3 (37.Qf3 Rg5+–) 37...Ke8 (37...Ke7 38.Qf3 Qa5 39.Reb1+–) 38.Qf3 (38.Rac1!? Rg2 39.Kh1 Bh6+–) 38...Bg6 (38...Bg7 39.Qf5+–) 39.Rac1 (better 39.a5+–) 39...Kd7 (39...Bh6 40.Rc4 Bd2 41.Qh3+–) 40.Rc6 (better 40.Qh3 Ke8 41.Qe6 Be7 42.Qg8 Bf8 43.Qe6 Be7+–) 40...Bh6 (40...Ke7+–) 41.Qh3 Ke7 42.Qh6 Be4 (42...Qb8 43.b6 Kf7+–) 43.Re4 Kf7 44.Qh7 Rg7 45.Qh5 Rg6 46.Re6 (46.Rg4 Ke8 47.Qg6 Kd7 48.Qf5 Ke7 49.Qe6 Kf8 50.Rg8) 46...Qg8 47.g3 (47.Rc7 Kf8 48.Rc8 Kf7 49.Rg8 Kg8 50.Qg6 Kf8 51.Re8) 47...Kf8 48.Rc8 Kf7 49.Rg8 Kg8 50.Qg6 (50.Qg6 Kf8 51.Re8) 1–0. AleksandrNekhoroshik – premovedmate (1605), lichess.org, 2020.

4.e3 a6 5.a4 ab5 (5...Nf7 6.Nc3=) 6.ab5 Ra1 7.Ba1 b6 (7...Nf7 8.d4=) 8.c4 (8.Be5 fe5 9.Qh5 g6 10.Qe5 Nf6+–) 8...c5 (8...Nf7 9.Nf3=) 9.Nf3 Nf3 10.Qf3 e5 11.Be2 Ne7 12.Nc3 Bb7?? (better 12...Qc7+=) 13.Qb7+– Nf5 (13...g6 14.0–0+–) 14.0–0 (14.Nd5!? Bd6+–) 14...Nd6 15.Qd5 Be7 16.f4 e4 (16...ef4 17.Rf4 Nf7 18.Ne4+–) 17.Bh5 g6 18.Be2 f5 (18...Qb8 19.Ne4 Ne4 20.Qe4+–) 19.Bb2 (better 19.Ne4 Ne4 20.Bh8 Bf6 21.Qg8 Ke7 22.Qh7 Ke6 23.Bf6 Qf6+–) 19...Qc7 (19...Rf8 20.Ra1 Nc8 21.Ra8+–) 20.Ra1 (20.Ne4 Rf8 21.Nc3 Bf6+–) 20...Bf6 21.Ra8 Nc8 (21...Ke7 22.Rh8 Bh8 23.Qg8 Bc3 24.Bc3+–) 22.Ne4 Bb2 23.Rc8! Qc8 24.Nd6 Ke7 25.Nc8 Rc8 26.g4 (26.Qb7 Re8 27.Qb6 Ba3+–) 26...h5 (26...Rf8 27.g5+–) 27.gf5 Bf6 (27...gf5 28.Qf5 Rg8 29.Kf2 Rf8 30.Qh7 Kd6 31.Bh5 Rh8+–) 28.fg6 Bh4 29.Bh5 Rc7 30.Qe5 (30.Qf7 Kd6 31.Qg7 Bf2 32.Kf2 Ra7 33.Qe5) 30...Kd8 31.g7 (31.Qh8 Ke7 32.Qg7 Ke8 33.Qf7 Kd8 34.Qf8) 31...Ra7 (31...Bf2 32.Kf2 Kc8 33.g8Q Kb7 34.Bf3 d5 35.Bd5 Ka7 36.Qc7) 32.g8Q 1–0. GuestLGCP – GuestHSZW, freechess.org, 2017.

4.e3 b6 5.d4 Nf7 6.Be2 g6 7.Nf3 Bg7 8.0–0 Kf8 9.Nbd2 d6 10.c4 Bd7 11.d5 g5 (11...a6 12.Nd4+–) 12.Rb1 (12.Nd4 f5+–) 12...h5 13.Nd4 Ne5 14.Bh5 (better is 14.f3!? a6+–) 14...g4 15.Bg4?? (better is 15.f4 Rh5 16.fe5 de5 17.Nc6 Bc6 18.bc6+–) 15...Bg4 16.Qg4 Ng4 17.Ne6 Kf7 18.Nd8 Rd8 19.h3 Ne5 20.f4 Nd3 21.Ba1 (21.Bd4 e6 22.Rb3 Nc5+=) 21...f5 22.Rb3 Nc5 23.Ra3 Ra8 24.Bg7 Kg7 25.Nb3 Nb3 (25...Nf6 26.Kh2–/+) 26.Rb3 (better is 26.ab3!? e6 27.de6–/+) 26...Nf6 27.Rc1 (27.Ra3 e6–+) 27...Ne4 28.Ra3 Ng3 (28...Kf6 29.Kh2–+) 29.Kf2 Ne4 (29...Nh5–/+) 30.Ke2?? (30.Kg1 Kf6 31.Ra6–+) 30...Kf6–+ 31.Rh1?? (better is 31.Rg1–+) 31...Ng3 (31...Ng3 32.Ke1 Nh1–+) 0–1. Familyfork – Flip4, Live Game Caissa's Web, 2004.

4.e3 c6 5.Be5+/– fe5 6.Qh5 g6 7.Qe5 Bg7?? (better is 7...Nf6+=) 8.Qg7+– Nf6 (8...d6 9.Qh8 Be6 10.Qh7 Bf7+–) 9.Qh8 Ng8 10.Qg8 1–0. 73DADDELDU37 – stierdame1965, mySchach.de, 2005.

4.e3 Nf7!? =.

4.e3 Ng6 5.d4 +=.

4.e4 Ng6 +=.

4.e4 d5

5.ed5 Qd5

6.Nc3? Qe6! 7.Qe2 (7.Be2 Nc4! –+) 7...Nc4 =+. Aasum.

6.d4 Qe4 7.Ne2 Nc4 8.Bc1 (8.Bc3? Bf5! –+) 8...Bf5 9.c3 =+/unclear. Aasum.

3.Bb2 Ng6

4.c4 e5 5.e3 c5 6.Nf3 f6 7.Be2 b6 (7...e4!? 8.Ng1 d5=) 8.0–0 Bb7 9.d3 d5 10.a4 Bd6 11.cd5 Bd5 12.e4 (12.Nc3!? Be6 13.Ne4+=) 12...Be6= 13.Nbd2 Nh6 14.h3 0–0 15.Nc4 Qd7 16.Nfd2 f5 (16...Be7 17.Bc1+=) 17.Nd6 Qd6 18.ef5 Bf5 Exerts pressure on the isolated pawn 19.Nc4 Qc7 20.Qc2 Rae8 21.Bf3 Nh4 (21...Bh3 22.Rfe1+=) 22.Qe2 (better is 22.Bc6 Bd7 23.Be5+/–) 22...Bh3 23.Bd5 Be6 24.Be5?? (better is 24.Bc6 Bd7 25.Be5 (worse is 25.Ne5 Bc6 26.bc6 Ng6–/+) 25...Bc6 26.Bc7 Re2 27.bc6–/+) 24...Bd5–+ 25.Qh5 Re5! 26.Ne5 (26.Ne5 Rf5 Double attack (26...Rf5 Decoy); 26.Qe5 Qe5 Combination) 26...N6f5 (26...Ng2 27.d4–+) 27.Nc4 (27.g3 Qe5 28.gh4 Qd4–+) 27...Bg2 28.Rfe1 (28.f4 Qd7 29.Rf2 Bf3–+) 28...Nd4 29.Ne5 Qe5! 30.Re5 (30.Re5 Nhf3 Double attack (30...Nhf3 Decoy); 30.Qe5 Ndf3 Mate attack) 30...Ndf3 31.Qf3 Nf3 (31...Rf3?! 32.Rh5 Rf4 33.Rh4 Rh4 34.Kg2–+) 32.Kg2 Ne5 0–1. Hal1958 – Shadow_cup, playchess.de, 2006.

4.c4 e6 5.Nf3 Nf6 6.g3 b6 7.Bg2 Bb7 8.0–0 Be7 9.Nc3 0–0 10.a4 d5 11.Nd4 Ne5 12.d3 Rb8 (12...c5 13.bc6 Nc6 14.Nc6 Bc6 15.cd5 ed5=) 13.a5 (13.cd5!? ed5 14.Nf5+=) 13...ba5 (13...dc4 14.Bb7 Rb7 15.a6=) 14.Ra5 (better is 14.cd5 ed5 15.Nf5=) 14...dc4 15.Nc6 (15.dc4!? Bg2 16.Kg2–/+) 15...Bc6–+ 16.bc6 Rb2 (16...cd3?! 17.Ba1 Qd6 18.Ne4 Ne4 19.Be5 Qc6 20.Qd3+=) 17.Re5? (17.Na4 Ra2 18.Re5 cd3 19.Nc3 de2 20.Re2 Qd1 21.Rd1 Re2 22.Ne2–+) 17...Qd4 (17...Qd4 18.Ra5 Qc3 19.Ra7 cd3 20.Qd3 Qe5–+) 0–1. algernon (2275) – jbloe (2420), net–chess.com, 2013.

4.d4?! d5 =. Aasum.

4.e3 a6 5.ba6 ba6 6.Nf3 e6 7.Nc3 N8e7 8.Bd3 d5 9.0–0 Nc6 10.Ne2 Nge5?? (better is 10...Rb8 11.Rb1 Qd6+=) 11.Ne5+– Ne5 12.Be5 f6 13.Bg3 Bc5 14.c4 d4 15.Nf4 de3 (15...e5 16.Qf3 Bd7+–) 16.Qh5 g6 17.Qc5 f5 (17...ef2 18.Rf2 f5 19.Re1+–) 18.Qe3 Bb7 (18...0–0 19.c5 Re8 20.Bc4+–) 19.Ne6 Qe7 20.Rae1 Kf7 21.Ng5 Qg5 22.Qg5 Bg2 23.Qe7 Kg8 24.Be5 Rf8 (24...Bf1 25.Qg7) 25.Qg7 1–0. b4_player – kemme, casual, 2013.

4.e3 c5 5.c4 (5.Nf3 d5=) 5...Nh6 (5...Nf6 6.Nf3=) 6.Nf3+= a5 (6...d6 7.Be2+=) 7.a4 (7.Be2 d5+=) 7...e5 (7...d5 8.cd5 Qd5 9.Nc3+=) 8.Ne5+/– b6 (8...Ne5!? 9.Be5 d5+/–) 9.Qf3 Ne5? (better is 9...Rb8+–) 10.Qa8 (10.Be5?! Ra7+/–) 10...Nc4 (10...f6+–) 11.Bc4 d6 (11...f6 12.d4+–) 12.0–0 (better is 12.Qe4 Qe7 13.Qc6 Bd7 14.Qb6+–) 12...Be7 (12...Nf5+–) 13.Bg7 Rg8 14.Bh6 Bf6 (14...Bh3 15.Qc6 Bd7 16.Qe4+–) 15.Qe4 (better is 15.Nc3 Rg6 16.Bf4 Be5+–) 15...Be7 (15...Qe7 16.Qc6 Bd7 17.Qa8 Qd8 18.Qd8 Bd8 19.Bf4+–) 16.Nc3 (better is 16.Qh7 Kd7 17.Qf7 Re8+–) 16...Rg6 17.Bf4 Rg7 (17...Bh3 18.Bg3 Be6 19.d3+–) 18.Qa8 (18.d4 Bh3 19.Bg3 Bg4+–) 18...Bf6 (18...Bh3 19.Qc6 Bd7 20.Qb7+–) 19.Bd6! Rg4 (19...Qd6 A deflection 20.Qc8) 20.Rae1 (better is 20.Nd5 Rg2 21.Kg2 Bh3 22.Kh3 Qa8 23.Nc7 Kd7 24.Na8 Kd6 25.Ra3+–) 20...Rc4 21.Nd5 Bg5 (21...Qd6 22.Qc8 Bd8 23.Nc3+–) 22.Nb6! Rc2 (22...Qb6 Theme: Deflection from c8 23.Qc8 Annihilates a defender: c8) 23.Qc8 (better is 23.Nc8 Rd2 24.Rd1+–) 23...Rd2 24.Qc6 Qd7 25.Qd7 1–0. Trkn – freighttrain, itsyourturn.com, 2000.

4.e3 d5 5.c4 Nf6 6.cd5 Nd5 7.Nc3 Nc3 8.Bc3 e5 9.a4 Bc5 10.Nf3 0–0 (10...e4!? 11.Nd4 0–0=) 11.Ne5+= Ne5 12.Be5 Re8 13.Bb2 Bf5 14.Be2 Qd6 15.0–0 Qh6 16.Bf3 Bd6 Threatening mate: Qxh2 17.g3 White gets strong initiative 17...f6? (better 17...Rab8+=) 18.Bb7+– Rad8 19.Bc6 Re7 20.Qf3 Qg5 21.h4 Qg6 22.Qe2 (22.h5 Qg5+–) 22...Bg4? (22...Bd3!? 23.Qd1 Bf1 24.Kf1 Qd3 25.Qe2 Qb3+–) 23.Bf3 (23.Qc4 Be6 24.Qd4 a6+–) 23...Be6 (23...Bf3!? 24.Qf3 Qd3+–) 24.Rac1 h6 25.Rc6 Bh3 26.Rfc1 Bd7 (26...Bc8+–) 27.a5?? (better 27.Ra6+–) 27...Bc6+– 28.Rc6 (28.Bc6 f5+–) 28...Be5? (better 28...Qb1!? 29.Bc1 Kh8+=) 29.Be5 (29.d4 Bd6+–) 29...Re5 30.b6 (30.Qc4 Kh7 31.Rc7 Rd2 32.Kg2 (32.Ra7?! Qb1 33.Qf1 Rb5+–) 32...Re3 33.Ra7 Rf3 34.Kf3 Qf5 35.Qf4 Qd3 36.Qe3 Qf5 37.Kg2+=) 30...ab6 31.ab6 cb6 (31...Qb1 32.Qf1 Qf1 33.Kf1 cb6 34.d4=) 32.Rb6+= Qc2 Attacks the pawn on d2 (better 32...Rc5 33.h5 Rc1 34.Kg2 Qf7+=) 33.Bh5?? (better 33.d4 Qe2 34.Be2+–) 33...Rd2 34.Qf3?? (34.Bg6 Qc1 (34...Re2?? 35.Rb8 Qc8 36.Rc8 Re8 37.Re8) 35.Kg2 Rd8= (35...Re2 36.Rb8 Qc8 37.Rc8 Re8 38.Re8)) 34...Qc1 (better 34...Rh5 35.Rb8 Kh7 36.Qh5 Rd1 37.Kg2 Qe4 38.Qf3 Rg1 39.Kg1 Qf3–+) 35.Kg2=+ Rd8 36.Qc6?? (better 36.Bg6 Qc5 37.Rc6=+) 36...Qc6–+ 37.Rc6 Re7 (better 37...Rh5 38.Kf3 Rf5 39.Ke2 Rfd5–+) 38.Rc4 Red7 39.Rf4 Re7 (39...Rd2 40.Bg6=+) 40.g4 (40.Rc4 g5=+) 40...Rd6 (40...Kh7 41.g5 hg5 42.hg5 Re5–/+) 41.g5? (better 41.Bg6!?=+) 41...hg5 42.hg5 fg5 (42...Re5 43.Rg4–/+) 43.Rg4 Rf6 44.f4? (better 44.Rg5 Kh7 45.Rd5=+) 44…Re5?? (44...Re5 45.fe5 Rc6+–; better 44...Re3 45.fg5 Rfe6–+). RichardSommer (2070) – vishytheplayer (2165), lichess.org, 2020.

4.e3 d5 5.Be2 e5 6.d3 (6.c4 Nf6+=) 6...Nf6 7.Nf3 Bd6 8.Nbd2 0–0 9.0–0 Qe7 10.c3 (10.c4 c6=) 10...e4 11.de4 de4 (worse is 11...Ne4 12.c4 Be6 13.cd5 Bd5 14.Nc4 Bc4 15.Bc4=) 12.Nd4 Qe5 The mate threat is Qxh2 13.g3 Bh3 14.Re1 h5 (14...Qg5 15.c4+=) 15.Bf1 (15.Nc4 Qg5=) 15...Be6 (15...Bf1 16.Rf1 Qg5 17.c4+=) 16.a4 h4 17.Ba3 (17.f4 ef3 18.N2f3 Qc5+=) 17...hg3 18.fg3 Nd5 (18...Ba3!? 19.Ra3 Rad8=) 19.Bd6 cd6 20.Nc4 Qf6 21.Nd6 Ne5 (21...Nc3!? 22.Qc2 Bd5+/–) 22.Ne4+– Qh6 23.Qd2 Nc4?? (better is 23...Rac8+/–) 24.Bc4+– Nb6 (24...Rfd8 25.Nc5 Nc7 26.Be6 Ne6 27.Nb7+–) 25.Bf1 (25.Be6!? fe6 26.Nc5 e5+–) 25...Rad8 26.Nf2 (26.a5!? Nc4 27.Qf2 Ne5+–) 26...Rfe8 27.Nd3 (27.Nd3 Bd5 28.Nf4+–) 1–0. Fritz,Harry – Krause, corr, 1966.

4.e3 e6 5.Nf3 d5 6.Be2 Bb4?? 7.Bg7+– N8e7 8.Bh8 Nh8 9.0–0 Bd6 10.c3 (10.d4 a6+–) 10...c6 11.bc6 bc6 12.c4 dc4 (12...Nhg6 13.d4+–) 13.Nc3 Kd7 (13...Nd5 14.Bc4 Nc3 15.dc3+–) 14.Bc4 Qg8 (14...Ke8 15.Ne4+–) 15.Ne4 Bb7 (15...Qg7 16.Nd6 Kd6 17.d4+–) 16.Ng3 (better 16.Nf6 Kc7 17.Ng8 Rg8 18.d4+–) 16...Bg3 (16...c5 17.d4 cd4 18.Nd4+–) 17.fg3 Nf5 18.Ne5 Kd6 19.d4 Ng6 (19...Ne3 20.Qf3 Qg5 21.Ba6 Nf1 22.Rf1+– (22.Qf1?! Ba6 23.Qa6 Qe3 24.Kh1 Qc3+–; worse 22.Bf1 Rc8 23.Rb1 Rb8+–)) 20.Rf5! ef5 21.e4 (better 21.Nf7 Kc7 22.Qe1 a5+–) 21...Ne5 22.de5 Ke5 23.Qb3 (23.Qd7 Bc8 24.Qe7 Be6 25.ef5+–) 23...c5?? (better 23...Qd8 24.Kh1 Qb6+–) 24.Bf7 Qg5 (24...Qc8 25.Qb2 Kd6 26.Rd1 Bd5 27.Bd5 Qh8 28.Ba8 Qd4 29.Rd4 cd4 30.Qb4 Ke6 31.ef5 Kf7 32.Bd5 Kg7 33.Qd4 Kf8 34.Qf6 Ke8 35.Bc6) 25.Bd5 (25.Qe6 Kd4 26.Rd1 Qd2 27.Qd6 Bd5 28.Qd5 Ke3 29.Qd2 Ke4 30.Qf4) 25...Bd5 (25...Qd2 26.Rd1 Bd5 27.ed5 c4+–) 26.Qd5 Kf6 27.Qa8 Qe3 28.Kh1 Qf2 (28...Qd3 29.Qf8 Ke6 30.ef5 Kd7 31.f6+–) 29.Rg1 (better 29.Rd1 Qd4 30.Qf8 Ke6 31.ef5 Kd7 32.Rd4 cd4+–) 29...c4 30.Qc6 Kg5 31.Qc4 (31.h4 Kh5 32.Qe8 Kh6 33.Qf8 Kg6 34.Rd1 Qg3 35.Qf5 Kh6 36.Rd6 Qg6 37.Qf4 Kg7 38.Rd7 Kh8 39.Qe5 Kg8 40.Qb8 Qe8 41.Qe8) 31...h5 (31...Qd2+–) 32.Qg8 Kh6 33.h4 f4 (33...Qg1 34.Kg1 fe4 35.g4 hg4 36.Qg5 Kh7 37.h5 g3 38.h6 e3 39.Qg7) 34.Qg5 (34.Qg5 Kh7 35.Rd1 Qd4 36.Rd4 Kh8 37.Rd7 fg3 38.Qd8; 34.Rd1 Qc5 35.Qe6 Kg7 36.Rd7 Qe7 37.Qe7 Kg6 38.Qd6) 1–0. Agiant – mericgenc, lichess.org, 2019.

4.e3 Nf6 5.c4 e6 6.Bd3 Be7 7.Nf3 0–0 8.0–0 d5 9.Qc2 dc4 10.Bc4 Bd7 11.Nc3 (11.a4 c6=) 11...c6 12.a4 Qb6 13.Nd4 (13.d3 Rac8=) 13...Ne5 (13...e5 14.Nf5=) 14.Be2 White gets in control 14...cb5 15.ab5 Rac8 16.Qb3 Rc7? (16...Ng6 17.Na4 Qd6 18.Ba3+=) 17.Rfb1 (17.Na4 Qa5 18.Bc3 Rc3 19.dc3 Qc7+–) 17...Rfc8? (better 17...Re8+=) 18.Na4+– Qa5 19.Bc3 Rc3 20.Nc3 Qb6 21.Na4 (21.Qa2 Ra8+–) 21...Qd8 (21...Qd6 22.Nb2 Ne4 23.Qd1+– (23.Ra7?! Nd2 24.Qd1 Nb1 25.Qb1 Qb6=)) 22.f4 Ng6 23.Nf3 Ng4 (23...Nd5 24.d4+–) 24.h3 Nh6 25.Nc3 Nf5 26.Kh2 Bf6 (26...Qb6 27.Bd3 Nfh4 28.Nh4 Nh4 29.Be4+–) 27.Ra7 (27.Ra7 Qb6 28.Qa4 Bc3 29.dc3 Qe3 30.Rd1+–) 1–0. petrobbo (2005) – steveberkley (2070), ChessWorld.net, 2010.

4.e3 Nf6 5.c4 e6 6.Nf3 Be7 7.d4 (7.h4 0–0=) 7...0–0 (7...a6 8.Bd3=) 8.Be2 (8.Bd3 d5=) 8...d5 (8...a6 9.0–0=) 9.c5 (9.0–0 a6=) 9...b6 10.c6 a6 (10...Bb4 11.Nc3=) 11.a4 (11.Qa4 Re8=) 11...ab5 (11...Bb4 12.Bc3 Bd6 13.0–0=) 12.ab5+= Ra1 13.Ba1 Bb4 (13...Re8 14.0–0+=) 14.Nbd2 (14.Bc3 Qe7+=) 14...Ba5 (14...Ne4!?=) 15.0–0+= Qe7 16.Qc2 h6 (16...Bd2 17.Nd2 e5 18.de5 Ne5 19.Bd4+=) 17.Bb2 (17.Bd3 Nh8+–) 17...Re8 (17...Bd2 18.Qd2 Ne4 19.Qd3+–) 18.Bd3 Qb4 (18...Bd2 19.Nd2 e5 20.Bg6+–) 19.Bg6 (19.Ra1!?+–) 19...fg6+– 20.Ra1 (20.Qb3 g5 21.Ba3 Qc3+–) 20...g5 (20...Qb5 21.Nb3=) 21.Ba3 (21.Nb3 Qb5 22.Na5 ba5 23.Ne5+–) 21...Qc3 (better 21...Qb5!? 22.Nb3 Ba6+=) 22.Qg6?? (better 22.Qc3 Bc3 23.Ra2+–) 22…Qa1–+ (22...Qa1 23.Nb1 Qa2–+) 0–1. GuestZGKR – cubanochico, freechess.org, 2018.

4.e3 Nf6 5.Nf3 c6 6.a4 cb5 7.ab5+= a6 8.ba6 Ra6? (better 8...ba6 9.Bf6 ef6+=) 9.Ba6+– ba6 10.0–0 e5 (better 10...e6+–) 11.Ne5 Bd6 12.Nf3 Bb7 13.Re1 Qc7 (13...0–0 14.Bd4+–) 14.h3 (14.Bf6 gf6 15.d4 f5+–) 14...h5 (14...Be7 15.Bd4+–) 15.Ba3 (15.Bf6 gf6 16.d4 Rg8+–) 15...h4 16.Bd6 Qd6 17.d4 Ne4 18.c4 0–0 19.c5 Qd5 20.Nbd2 Ng5 (20...Nd2 21.Qd2 Qf5 22.Nh2+–) 21.Rb1 Bc6 22.Qb3 (22.Rb6!? Nf3 23.Nf3 Qc4+–) 22...Qf5 23.Ng5 Qg5 24.Qd3?? (better 24.f3+–) 24…Qg2 0–1. UrubuRei (1800) – banistyle (1845), lichess.org, 2018.

4.e3 Nf6 5.Nf3 e6 6.c4 b6 7.Be2 Bb7 8.0–0 Bd6 9.d4 0–0 10.a4 a6 11.Nbd2 a5 12.Nb3 Rc8 13.c5 Be7 14.Rc1 Ne4 15.Qc2 Ng5 16.Nfd2 f5 17.f3 Bf6 18.e4 (18.c6!? dc6 19.bc6+=) 18...Nf4= 19.Bc4 Kh8 20.Rcd1 Qe8 21.Bc1 (21.h4 Ngh3 22.Kh2 Qg6+=) 21...Ng6 (21...Qg6!? 22.g3 fe4 23.fe4 d5+=) 22.Rfe1 f4 23.d5 Rd8 24.c6 Bc8 25.Nb1 (25.Ba3 d6+=) 25...d6 (25...Ne5 26.cd7 (worse is 26.Bf4 Nef3 27.gf3 Nh3 28.Kh1 Nf4+=) 26...Rd7 27.Kh1=) 26.Nc3 Ne5 27.Be2 Be7 28.Nd4 Qg6 29.Kh1 Qh6 30.Bd3 Rf6? (30...Nd3 31.Qd3 e5 32.Nb3=) 31.Nce2 (better is 31.de6!? Be6 32.Nf5 (32.Ne6?! Ne6 33.Nd5 Rf7+=) 32...Bf5 33.ef5+–) 31...Rdf8 32.de6 Ne6? (32...Qh5 33.g4 Qe8 34.Rf1=) 33.Ne6 (better is 33.Nf5 Qh5 34.Ne7 Nf3 35.gf3 Qf3 36.Kg1+=) 33...Be6= 34.Nd4 Bc8 35.Qf2 R6f7 36.Rg1 (better is 36.Re2=) 36...Bh4–/+ (36...Nd3?! 37.Rd3 Bh4 38.Qf1=) 37.Qb2?? (better is 37.Qf1 Bg3 38.h3–/+) 37...Bg3 38.h3 Bh3! 0–1. Bychkova,Ekaterina – Batalina,Irina, UKR–ch U14 sf, 2004.

4.e4 e5?! 5.d4! +=. Aasum.

4.e4 e5 5.f4 ef4 6.Nf3 d6 7.d4 Nf6 8.Nbd2 Be7 9.a4 (9.Bc4 Ng4 10.Nf1 f5–/+) 9...0–0 (9...Ng4 10.Qc1–+) 10.Be2 Bg4 (better 10...Ng4 11.Nf1 Re8–/+) 11.Nh4?? (11.0–0 d5 12.Ne5 Be2 13.Qe2 de4 14.Ne4 Nd5=+) 11...Qd7 (11...Be2 12.Qe2 Nh4 13.0–0–+) 12.c4?? (better 12.Ng6 fg6 13.0–0=+) 12...Ne8 (better 12...Nh4 13.0–0 Ng6–+) 13.Ng6+– (13.Bg4?! Bh4 14.g3 f5 15.Bf5 Rf5 16.ef5 fg3+–) 13...Bf3 (13...Be2 14.Ne7 Qe7 15.Qe2 f5+–) 14.Kf1 (better 14.Nf8 Be2 15.Nd7 Bd1 16.Rd1+–) 14...Bg4?? (better 14...Be2 15.Qe2 fg6=+) 15.Qb3 (better 15.Bg4 Qd8 16.Nf8 Bf8 17.Qf3+–). retiponziani (1680) – steveberkley (1995), ChessWorld.net, 2008.

4.e4 Nf6 5.e5 Nd5 6.c4 Nb6 unclear. Aasum.

4.e4 Nf6 5.e5 Ne4 =.

4.Nf3 b6 5.e3 Bb7 6.d4 e6 7.Be2 d5 8.0–0 Bd6 9.c4 Nh4 10.c5 Nf3 11.Bf3 Bc5 12.dc5 1–0. Machete99 – guest950, ICC, 2002.

4.Nf3 c6 5.a4 a6 6.e3 ab5 7.ab5 Ra1 8.Ba1 Nf6 9.h4 h5 10.Bd3 d6 11.0–0 e5 12.Bg6 fg6 13.c4 Bg4 14.Qc2 Bf3 15.Qg6 Ke7 16.gf3 Rh6 17.Qd3 (better 17.Qf5+=) 17...Kf7? (better 17...Ke8=) 18.Be5!+– Rg6 (18...de5 Exploits the pin 19.Qd8 Eliminates the defender d8) 19.Bg3 Nd7 20.Qf5 Nf6 21.bc6 bc6 22.Nc3 d5 (22...Qd7 23.Qd3+–) 23.Ra1 Qb8?? (23...Be7+–) 24.Qg6! (24.Qg6 Kg6 25.Bb8 dc4 26.Ra4+–) 1–0. onur604 (2320) – Gataca2 (2215), lichess.org, 2020.

4.Nf3 d5 5.e3 =.

4.Nf3 d6 5.e3 e5 6.d3 Bg4 7.Be2 Nf6 8.0–0 Be7 9.c4 0–0 10.Nc3 Ne8 (10...a6 11.a4=) 11.Nd2 (11.Nd5 Be6+=) 11...Bd7 (11...Bf5 12.d4=) 12.Nd5 (12.Bf3 c6=) 12...f5 (12...a6 13.ba6 Ra6 14.Qb3=) 13.e4 (13.f4 ef4 14.Nf4 Nf4 15.ef4 Bf6+=) 13...f4 (13...Nf6 14.d4=) 14.Ne7 (14.Bh5 c6 15.bc6 bc6 16.Ne7 Ne7+=) 14...Qe7= 15.Bg4 (15.d4 Nf6=) 15...Nf6 (15...Bg4 16.Qg4 Nf6 17.Qf3=) 16.Bd7 Nd7 17.Nf3 Nh4 18.a4 Nf3 19.Qf3 Qh4 20.d4 g5 21.de5+/– Ne5 22.Be5 de5+= 23.h3 h5 24.c5 g4 25.hg4 hg4 26.Qb3+= Kg7 27.Qe6?? f3?? 28.gf3?? gf3–+ 29.Qe5 Rf6 30.Qe7 Kh6 31.Qe5 Rg6 32.Qg3 0–1. metal – PineMartin (1640), caissa.com, 2007.

4.Nf3 e6 5.e3 Nf6 (5...d5 6.d4=) 6.d4 (6.h4 d5=) 6...d5 (6...a6 7.ba6 b6 8.Nbd2=) 7.Be2 (7.Bd3 Bb4 8.c3 Bd6=) 7...Bd6 8.0–0 0–0 (8...a6 9.c4=) 9.Nbd2 (9.c4 dc4 10.Bc4 Bd7=) 9...Bd7 (9...a6 10.c4=) 10.a4 Qe7 (10...Ne4 11.Ne4 de4 12.Ne5+=) 11.Bd3 (11.c4 Bb4+=) 11...Rac8 (11...Bb4 12.c4+=) 12.e4 (12.c4 c5+=) 12...de4 13.Ne4 Ne4 (13...Nf4 14.Nd6 cd6 15.c4+=) 14.Be4+= Rb8 (14...c6 15.Re1+=) 15.Bg6 (15.Ne5 a6+=) 15...fg6 (15...hg6 16.Ne5=) 16.Ne5 (16.Qe2 a6+=) 16...Be5 (16...Rf5 17.Qe2+=) 17.de5 Qf7 (17...Rf7 18.Qg4+=) 18.c4 (18.Qd4 a6 19.Rfd1 Rfd8+/–) 18...Rbd8 (18...Rfd8 19.Bd4+/–) 19.Qe2 (19.Ba3 Rfe8 20.Qe2 a6+/–) 19...Bc8 (19...Qf4 20.Rad1+=) 20.c5 (20.Ba3 Rfe8+/–) 20...c6 (20...Qf4 21.Qe3+=) 21.Bc1 h6 22.Be3 Rd5 23.f4 Rfd8 24.Rad1 Qf5 25.g4 Qf7 26.Rc1 Rd3 27.g5 h5 28.Rfd1 Qf5 29.Kg2 Qe4 30.Kf2 Qf5 31.Kg2 Qe4= 32.Kf2 Qd5?? 33.Rd3+– Qd3 34.Qa2 Qd5 35.Qc2 Kf7 36.Qb2 Rd7 37.a5 Rd8 38.bc6 Qc6+= 39.Qb3 Qd5 40.Qd5+/– Rd5 41.c6 bc6 42.Rc6 Bd7 (43.Ra6 Bb5 44.Ra7 Rd7 45.Rd7 Bd7+–). Moxie – jones662, Caissa.com, 2005.

4.Nf3 e6 5.e3 Nf6 (5...d5 6.Be2=) 6.Be2 (6.h4 d5=) 6...d5 7.0–0 Bc5 (7...Bd6 8.c4=) 8.d4 (8.c4 Bd6=) 8...Bb6 (8...Be7 9.c4=) 9.c4+= dc4 10.Bc4 Bd7 (10...0–0 11.a4 c6 12.bc6 bc6 13.Nc3+=) 11.Nbd2 (11.Ne5 Nd5+=) 11...a5 (11...c6 12.a4+=) 12.a4 (12.ba6 ba6 13.Qe2 a5+/–) 12...c6+= 13.e4 (13.Ba3 Bc7+=) 13...cb5 (13...0–0 14.Ne5+=) 14.ab5 0–0 15.e5 (15.Qa4 Qb8+=) 15...Ne8 (15...Nd5 16.Ne4+=) 16.Ba3+/– Rc8? (better is 16...Ne7!?+/–) 17.Bf8+– Nf8 18.Rc1 Nc7 19.Ne4 Bb5 20.Bb5 Nb5+/– 21.Qa4 Rc1= 22.Rc1 Nd4 23.Nd4 Qd4 24.Qd4 Bd4 25.Rc8 Be5 26.g3 b5 27.Rc5= Ba1 28.Rb5+/– a4 29.Ra5 f5 30.Nc5 Bc3 31.Ra4+/– e5 32.Rc4 Bd4+= 33.Nd3 Nd7 34.Kg2 Kf7 35.Rc7 Ke6 36.f3 Kd6= 37.Rb7 Nc5?? 38.Nc5+– Kc5 39.Rg7 e4 40.Rh7 e3 41.Re7 Kc4 42.Kf1 Kd3 43.f4 Bc3 44.Re8 Bd2 45.h4 (45...Ba5 46.h5+–; 45.Rd8 Ke4 46.Ke2 Bc3+–) 1–0. grain – bueno, Caissa.com, 2005.

4.Nf3 e6 5.e4 d5 6.ed5 ed5 =.

4.Nf3 Nf6 5.c4 d6 6.Nc3 e5 7.d3 Be7 8.a4 b6 (8...Bg4 9.a5=+) 9.e4 Bb7 10.Be2 Nf4 11.0–0 h5 (11...a6 12.Bc1 Ne2 13.Qe2 ab5 14.cb5=) 12.Bc1 h4 (12...Ne2!? 13.Qe2 a6+=) 13.Bf4+– ef4 14.Nd5 (14.h3!?+–) 14...Nd5 15.ed5 Bc8 (15...h3 16.g3+=) 16.Nd4 g5 (16...Bf6 17.Nc6 Qd7 18.d4+–) 17.Bg4 Bg4 18.Qg4 Qd7 19.Qd7 (19.Nf5!? Bf6 20.Rae1 Kd8 21.h3+–) 19...Kd7+= 20.Nc6 a5 21.Rae1 Bf6 22.f3 Rae8 23.Kf2 h3 (23...Bc3 24.Re8 Re8 25.Rc1+=) 24.Re8+= hg2 25.Rh8 gf1Q 26.Kf1 Bh8 27.Kg2 f5 28.Kh3 Bc3 29.Kg2 Bf6 30.Kf2 Bc3 (30...g4 31.Kg2=) 31.d4 Bd2 32.Kg2 g4 33.fg4 (33.h3 g3 34.Kh1=) 33...fg4=+ 34.h4 gh3 (34...Ke8!?=+) 35.Kh3= Ke8 36.Kg4 Kf7?? (better 36...Be3=) 37.Nd8+– Kf6 38.Ne6 Be3 39.Nf4 Bd4 40.Ne6 Ke5 41.Kf3 (41.Nc7?! Ke4+–) 41...Bc5 42.Ke2 (42.Nc7 Kd4–/+; 42.Nc5?! dc5 43.Ke3 Kf5=) 42...Ke4 43.Kd2 (43.Nc7 Kd4–/+; 43.Nc5?? dc5 44.Kf2 Kd4–+) 43...Bb4 44.Kc2 Ke3 45.Kb3 Bc5 46.Nc7 (46.Nc5?? dc5 47.Kc3 Ke4–+) 46...Kd4?? (better 46...Kd3+–) 47.Ne6+– Kd3 (47...Ke5 48.Nc5 dc5+–) 48.Nc5 Kd4 49.Nd7 Ke4 50.Nf6 (better 50.Nb6 Kf5+–) 50…Ke5 (50...Ke5 51.Ne8 Kf5 52.Nd6 Kf6+–). alki1 (1790) – banistyle (1760), lichess.org, 2017.

4.Nf3 Nf6 5.e3 d6 6.c4 e5 7.Be2 a6 8.a4 ab5 9.ab5 Ra1 10.Ba1 c6 11.0–0 Be7 12.d3 cb5 13.cb5 Bd7 14.d4 e4 15.Nfd2 d5 16.f3 Qb6 Attacking the isolated pawn on b5 (16...ef3!? 17.Nf3 Bd6=) 17.fe4+= de4 (better is 17...Ne4!? 18.Ne4 de4+=) 18.Nc3+/– 0–0 19.Nde4 Ne4 20.Ne4 Ra8 (20...Qe6 21.Qd3 Bb5 22.Qb5 Qe4 23.Qd3 Qd3 24.Bd3+=) 21.Qb3 Be6 22.Qb1 ½–½. mr5reasons1 (1670) – kuchaia (1675), gameknot.com, 2012.

4.Nf3 Nf6 5.e3 d6 6.Bc4 e5 7.Ng5 d5–/+ 8.Bb3 Be6 (better 8...e4!?–/+) 9.Ne6= fe6 10.0–0 Bd6 11.a4 0–0 12.c4 b6 (12...a6!?=) 13.cd5+= ed5 14.d4 e4 15.Nc3 h5? (better 15...Bb4+=) 16.Nd5+– Nd5?? (16...Bh2 17.Kh2 Nd5 18.Qh5 Nge7+–) 17.Bd5 Rf7 18.Qb3 (better 18.Qh5 Nh8+–) 18...Qf6 (18...Nh8 19.Ba8 (19.Be4?! Bh2 20.Kh2 Qh4 21.Kg1 Qe4+–) 19...Qa8 20.Qe6+–) 19.Bf7 (better 19.Ba8 Ne7 20.f3+–) 19...Qf7 20.Qf7 Kf7 21.Rac1 (21.f3 ef3 22.Rf3 Kg8+–) 21...Ne7 (21...Ke6 22.f3 Kd5 23.Rc3+–) 22.Rc4 (better 22.f3!? ef3 23.Rf3 Ke8+–) 22...Nd5 23.Rfc1 (23.Bc1 Ke6+–) 23...g5 24.Rc6 Ke6 (24...a6 25.f3 ef3 26.e4+– (26.gf3?! ab5 27.e4 Ne7 28.ab5 Nc6 29.Rc6 Ra2+–)) 25.Ba3 a6 26.Bd6 cd6 27.h3 (27.f3!? ef3 28.gf3 ab5 29.ab5 Ra5+–) 27...ab5 28.ab5 Ra5 29.Rb1 Ra2 30.Rc8 Nc3?? (30...g4+–) 31.Rc3 Ra5 (31...Ra7 32.Rc6 Rb7 33.Ra1+–) 32.Rc6 g4 33.hg4 hg4 34.Rb6 Ra8 35.Ra6 Rg8 (35...Rb8 36.Kh2+–) 36.b6 g3 37.fg3 Rg3 38.b7 Re3 (38...Rg8 39.Ra8 Rg4 40.b8Q Rg7 41.Qc8 Ke7 42.Ra7 Kf6 43.Rf1 Kg6 44.Qg4 Kh6 45.Rf6 Rg6 46.Qg6) 39.b8Q Rd3 (39...Re1 40.Re1 Ke7 41.Ra7 Kf6 42.Qg8 d5 43.Rf1) 40.Qd6 Kf5 41.Qe5 Kg4 42.Rg6 Kh4 43.Qh2 (43.Qg5) 43...Rh3 44.Qh3 1–0. martillaco (1660) – banistyle (1780), lichess.org, 2018.

4.h4 d6 =.

4.h4!? e6?! 5.h5 Nf4 unclear (+=) (5...Nh4 6.g3 Nf5 +=). Aasum.

4.h4 Nf6 5.h5 Nf4 6.h6 Ne6 7.g3 d5 8.hg7 (8.Nf3 Rg8=) 8...Bg7 9.Bh3 Bd7 10.a4 a6 11.ba6 Ra6 12.a5 b6 (12...c5!?–/+) 13.ab6= Rb6 14.Be5 Nh5 15.Nf3 Rg8?? (better 15...Nf6+=) 16.Be6+– Be6 17.Rh5 f6 (17...Bg4 18.Rg5 Rg6 19.Bg7 R8g7 20.Rg6 hg6 21.d4+–) 18.Bd4 c5 (18...Rb8+–) 19.Bc5 Rc6 (19...Rb2 20.Nd4 Bg4 21.Rh7+–) 20.Nd4 Rc5 (20...Qc8 21.Nc6 Qc6 22.d4+–) 21.Ne6 Qd6 22.Ra8 (better 22.Nc5!? Qc5 23.e4 Qc4+–) 22...Kf7 23.Rg8 Kg8 24.Nc5 Qc5 25.Nc3 (better 25.d4 Qc4+–) 25...Qd6 (25...f5 26.Qa1 Bc3 27.dc3+–) 26.Nd5 Qd5 1–0. FeegLood (2225) – Luminosity (1995), lichess.org, 2015.

4.e3 b6

5.Bc4 Bb7 6.Nf3 e6 7.0–0 Nf6 (7...a6 8.ba6 Ba6 9.Ba6 Ra6 10.Nc3=) 8.d3 (8.a4 Bb4=) 8...Be7 9.Nbd2 0–0 10.Ne5 Ne5 11.Be5 d6 12.Bb2 c6 13.a4 cb5 (13...Qc7 14.Nf3=) 14.Bb5 (14.ab5 Qe8=) 14...d5 15.h3?? (better 15.Bf6 Bf6 16.d4=+) 15...a6–+ 16.c4 ab5 17.cb5 Nd7 18.Nf3 Bf6 19.d4 Re8 20.Ne5 (20.Qd2 Qb8–+) 20...Ne5 (20...Be5!? 21.de5 Qg5 22.Bd4–+) 21.de5 Be7 22.Bd4 f6 23.f4 f5 24.g3 Bb4 25.Qb3 Ba5 26.Ra2 Rc8 27.Rb1 Re7 28.Rc2 Rc2 29.Qc2 Rc7 30.Qd1 Qc8 31.h4 (31.Qd3 Rc1 32.Rc1 Qc1 33.Kh2 g6–+) 31...Rc2 32.Bb2 (32.Qh5 Rc4–+) 32...Rd2 33.Qc1 Qc1 (33...Qc4 34.Qc4 dc4 35.Bd4–+) 34.Bc1 (34.Rc1 Rb2 35.Rc7–+) 34...Rd1 35.Kf2 Rd3 (better 35...d4 36.ed4 Be4 37.Ra1–+) 36.Ke2 Rc3 37.Kd1 (37.Bd2 Rc2 38.Rd1–+) 37...d4! 38.Bd2 (38.ed4 A pinning theme 38...Rg3) 38...Bf3 39.Ke1 Re3 (39...Re3 40.Kf1 Bd2–+) 0–1. petrobbo (2035) – twister (2055), ChessWorld.net, 2018.

5.Bc4 d5 6.Bb3 a6 7.a4 e5 8.Ne2 Nf6 9.0–0 Bd6=.

5.Bc4 d5 6.Bd3 a6 7.Nf3 ab5 8.Bb5 Bd7 9.Bd7 Qd7=.

5.Bc4 d5 6.Be2 e5 7.c4 Nf6 8.d4 ed4 9.Qd4 Bc5=.

5.Bc4 d5 6.Qf3 e6 7.Be2 a6 8.Nc3 Nf6 9.ba6 Ba6+=.

5.Qf3 d5 6.c4 e6 7.cd5 ed5 8.Ne2 a6 9.Nd4 N8e7=.

5.Nf3 a6 6.a4 Bb7 7.Be2 e6 8.0–0 Nf6 9.Nc3 Bb4=.

5.Nf3 f6 6.Nc3 (6.Be2 a6 7.d4 ab5 8.Bb5 Ba6 9.c4 Bb5+=; 6.d4 a6 7.a4 Bb7 8.Bd3 e6 9.0–0 f5+=; 6.a4 e5 7.d4 ed4 8.Bd4 a6 9.Bd3 ab5+=) 6...e5 (6...a6 7.a4 Bb7 8.ba6 Ba6 9.Bb5 Bb7+=) 7.h4 (7.d4 Bb7+= 8.de5 fe5 9.Bd3 Nh4=) 7...h5 (7...d5!?= 8.h5 N6e7 9.Be2 a6=) 8.d4+= Bb7 9.Bd3 Rh6 (9...N8e7+=) 10.0–0 Qe7 11.de5 Qb4 (better is 11...Ne5 12.Be4 Be4 13.Ne4 c6+/–) 12.Nd5+– Bd5 13.Bg6 (13.Bg6 Rg6 14.Qd5+–) 1–0. pierre – chuongn, internet, 2008.

5.h4 e6 6.h5 N6e7 7.h6 f6 8.hg7 Bg7 9.Qg4 Kf7+/–.

4.e3 e5

5.c4 Bc5 6.Nf3= d6 7.Be2 Nf6 8.0–0 0–0 9.d4 ed4 10.ed4 Bb6 11.a4 a6 12.a5 Ba7 13.Nc3 Re8 14.Bd3 Nf4 15.Qc2 (15.Bc2 Bg4=) 15...h6 (15...Bg4!? 16.Qd2 Nd3 17.Qd3 d5=+) 16.Rfe1 Bg4 17.Re8 Qe8 18.Re1 Qd7 19.Ne4 Ne4 20.Be4 (worse 20.Re4 Nd3 21.Qd3 Bf5 22.ba6 ba6–/+ (worse 22...Be4 23.Qe4 Qa4 24.ab7–/+)) 20...Re8 (20...ab5 21.Qd2 Ne6 22.a6=) 21.Qd2 (better 21.Re3+=) 21...d5? (21...Bf3 22.Bf3 (worse 22.gf3 g5 23.Bb7 Rb8–+; worse 22.Qf4 Be4 23.Re4 ab5–/+) 22...Re1 23.Qe1 ab5 24.Qe4+= (worse 24.Bb7 Nd3 25.Qe2 bc4–/+)) 22.Qf4 (22.Ne5!? Re5 23.de5 Nh3 24.gh3 de4 25.Qd7 Bd7 26.Rd1 Bh3 27.Rd8 Kh7 28.b6 cb6 29.Ra8 ba5 30.Ra7+–) 22...de4 (better 22...Bf3!? 23.Qf3 de4 24.Re4 ab5 25.Re8 Qe8+=) 23.Ne5+– Qf5 24.Qg4 Qg4?? (better 24...Re5 25.Qf5 Rf5 26.ba6 ba6+–) 25.Ng4 f5 (25...ab5 26.cb5 Rd8 27.Ne3+– (27.Re4?! f5 28.Re7 fg4+–)) 26.Ne3 f4 (26...Rf8 27.Nd5+–) 27.Nd5 Rd8 (27...c6 28.Nf4 ab5 29.cb5+–) 28.Ne7 (28.ba6!? ba6 29.Ne7 Kh7+–) 28...Kf7 29.Re4 Re8 30.Ba3 c5 (30...g5 31.d5+–) 31.dc5 (better 31.bc6 Bb8 32.cb7+–) 31...Re7 32.Rf4 (better 32.Re7 Ke7 33.c6 Kd8 34.cb7 ab5+–) 32...Kg6 33.g3 (33.Kf1 Rd7+–) 33...Bb8 (33...Re5 34.b6 Re1 35.Kg2 Bb8+–) 34.ba6 (better 34.Rf8!? Re1 35.Kg2 Be5 36.ba6 ba6+–) 34...ba6? (better 34...Bf4 35.ab7 Bb8+–) 35.Rg4+– Kf7 36.Bb2 (36.Rd4 Be5 37.Rd5 Bc3+–) 36...Kf8 (36...Re1 37.Kg2 Be5 38.Be5 Re5 39.Rd4 Rc5 40.Rd5+–) 37.c6 Bc7 (37...Re1 38.Kg2 g5+–) 38.Ba3 Kf7 39.Be7 Ke7 40.Rg7 Kd6 41.Rg6 Kc5 (41...Ke7 42.Rh6 Ba5 43.Rh7 Kd6 44.Ra7+–) 42.Rh6 Ba5 (42...Kc4 43.Rh7 Ba5 44.c7 Bc7 45.Rc7 Kd5 46.h4+–) 43.f4 (better 43.Rh5 Kc6 44.Ra5 Kb6+–) 43...Bc7 (43...Bd8 44.Rh8 Bb6 45.Kf1+–) 44.f5 (44.Rh7 Bb6 45.Kf1 Kc4+–) 44...a5 (44...Bb6 45.Kg2 Ba5 46.g4+–) 45.f6 Kd6 46.f7 Ke7 47.Rh7 (better 47.Rh8!? Kf7 48.Rh7 Ke6 49.Rc7 Kd6+–) 47...a4 (47...Bb6 48.Kf1 a4 49.c7 Bc7 50.f8Q Kf8 51.Rc7+–) 48.f8Q! (48.f8Q Kf8 49.Rc7+–) 1–0. GuestMKCQ – GuestSPWW, freechess.org, 2017.

5.c4 d6 6.a4 (6.Nc3 Nf6+=) 6...Bf5 7.Nf3 Nh6 (7...Nf6 8.Nc3=) 8.d3 Be7 9.Nbd2 0–0 10.Be2 Qd7 11.Nf1 (11.h4 Rfe8=) 11...f6 12.Ng3 Be6 13.d4 Rfd8 14.Qc2 Nf5?? (better is 14...a6+=) 15.d5+– (15.d5 Ng3 16.de6 (16.hg3?! Bf5 17.e4 Bg4+=) 16...Qe6 17.hg3+–) 1–0. Chirpii,Alexandru (1960) – Yaroshenko,Alexandr, Yuzhny UKR, Open, 2011.

5.Bc4 b6?? 6.Qf3+– (6...Nf6 7.Qa8+–) 1–0. Wall,Bill – Chapman,Joshua, Palm Bay, FL, 2003.

5.Bc4 d5 6.Bb3 a6 7.ba6 Ra6 =+.

5.d4!? e4 6.c4 =.

5.Nf3 d6 6.Bd3 Nh4 (6...Nf6 7.Nc3=) 7.0–0 Bg4 8.Be2 f5 (8...e4 9.Nh4 Be2 10.Qe2 Qh4 11.Qc4+/–) 9.Nh4 Qh4 10.Bg4 (10.f3 Bh5+=) 10...fg4 (10...Qg4 11.Qg4 fg4 12.d4=) 11.f3 (11.c4 0–0–0+=) 11...Nf6 12.Qe1 (12.f4 e4=) 12...Qh5 (12...Qe1 13.Re1 gf3 14.gf3=+) 13.fg4 (13.f4 e4=) 13...Qg4 (13...Ng4 14.h3 Nf6 15.d4=) 14.a4 (14.d4 e4=) 14...Be7 15.d3 0–0 16.Nd2 Nd5 17.Rf3 Bh4 (17...Rf3 18.Nf3 e4 19.de4 Qe4 20.Qg3=+) 18.Qe2= Rf6 (18...Qb4 19.Nc4=) 19.g3 (better is 19.c4!? Ne7 20.Raf1+=) 19...Raf8 (19...Bg5 20.Raf1=+) 20.Raf1 Nb4?? (20...Qb4 21.Be5 de5 22.gh4 Qa4 23.c4=) 21.Qg2 Bg5 22.h3 Be3 23.Re3+/– Qg5 24.Ref3 Nc2 25.Ne4 Qh5?? 26.Rf6 gf6 27.Nf6 Rf6 28.Rf6 Qd1 29.Qf1 Qf1 30.Rf1 Nb4 31.Rd1 Nc2 32.Rc1 Nb4 33.Rc7 Nd3 34.Ba3 e4 35.Kf1 e3 36.Bd6 Nf2 37.h4 Ne4 38.Be5 h5 39.Rb7 a6 40.ba6 Nc5 41.Rg7 Kf8 42.a7 Na4 43.a8Q 1–0. 1805DYDIDIDY – Mari, mySchach.de, 2005.

5.Nf3 d6 6.Be2 Nf6 7.0–0 Be7 8.h3 b6 (8...0–0 9.d4 e4 10.Nfd2=) 9.a4 0–0 10.c4 h6 (10...a6 11.d4 e4 12.Nfd2=) 11.d4+= e4 (11...ed4 12.Nd4 Bb7 13.Nd2+=) 12.Nh2 (12.Nfd2 Re8+–) 12...Nh7 (12...a6 13.Nc3+=) 13.d5 (13.Nc3 f5+=) 13...f5 14.Bd4 (14.a5 Nf6+=) 14...f4 (14...a6 15.Nc3=) 15.ef4 (15.f3 ef3 16.Nf3 fe3+=) 15...Nf4= 16.Bg4 Bf6 17.Bc8 (17.Nc3 a6=) 17...Rc8 (17...Bd4 18.Ra2 Nd3 19.Be6 Kh8 20.Re2–/+) 18.Nc3 Bd4 19.Qd4 Qg5 20.Ng4 (better 20.Qe4 Nh3 21.Kh1=) 20...h5–+ 21.Ne4 (21.Rae1 hg4 22.Ne4 Qg6–+) 21...Ne2 22.Kh1 Nd4 (22...hg4?! 23.Qb2 Qf5 24.Qe2=) 23.Ng5 Ng5 (worse 23...hg4 24.Nh7 Kh7 25.hg4–+) 24.Ne3 Rf4 (24...Nb3 25.Ra2 Ne4 26.a5–+) 25.a5 (25.f3 Re8 26.Ra3 Kf7–+) 25...Rcf8 (25...Nb3!? 26.Ra2–+) 26.ab6 ab6 27.Ra7 (27.Ra2 Ne4–+) 27...Rf2 (27...Ne4 28.Kg1 Nf2 29.Ra2–+) 28.Rf2 Rf2 29.Rc7 (29.h4 Ne4–+) 29...Ne4 (29...Re2 30.Nf1 Re1 31.Kg1–+) 30.Re7 (30.Ra7 Re2 31.Ra3 h4 32.Ra8 Kh7–+) 30...Nd2 (better 30...Ng3 31.Kg1 Re2 32.Re8 Kf7 33.Nf1 Ke8 34.Ng3–+) 31.Kg1 Rf4 (31...Re2 32.c5 dc5–+) 32.g3? (32.Re8 Kf7 33.Rb8 Ne2 34.Kh2–+) 32...Rf3 33.Kg2 (33.c5 dc5 34.d6–+) 33...Nf5 (better 33...Kf8 34.Nc2 Nc2–+) 34.Nf5 Rf5 35.Re2?? (35.Rc7–+) 35...Nc4 36.Rc2 (36.Re4 Na3 37.Ra4–+) 36…Ne3 (36...Ne3 37.Kh2 Nc2–+) 0–1. Abdullaevich (1835) – vladi22 (1880), lichess.org, 2020.

5.Nf3 e4 6.Nd4 d5 7.c4 Nf6 8.cd5 (8.Qc2 dc4 9.Bc4 Ne5=) 8...Nd5 9.Qc2 (9.Nc3 Nc3 10.Bc3=) 9...Nf6 (better 9...f5!? 10.a3 Bd6=) 10.Nc3+– Qe7 11.a4 (11.g3 Ne5 12.Ne4 Ne4 13.Qe4 c5 14.bc6 Nc6 15.Qe7 Ke7 16.Nc6 bc6+–) 11...Bd7 (11...Qe5 12.Nde2 Bf5 13.Ng3+–) 12.Ba3 (12.Bc4 c5 13.bc6 bc6+=) 12...Qe5 13.f4 (13.d3 ed3 14.Bd3 Ba3 15.Ra3 Nh4=) 13...ef3 (better 13...Nf4!? 14.Bf8 Rf8–/+) 14.Nf3= Qh5 (14...Bf5 15.Bd3 Bd3 16.Qd3+=) 15.Ne4+= Ba3 (15...Nd5!?+=) 16.Nf6+– gf6 17.Ra3 c6 (17...Ne5 18.Ne5 fe5 19.Qc7 Qh4 20.Kd1 Bg4 21.Be2 Be2 22.Ke2 Qg4 23.Ke1 Qh4 24.g3+–) 18.Qe4 (18.Be2 Qd5+–) 18...Kf8 (18...Ne5 19.d4 Qg6 20.Nd2+–) 19.Qb4 (19.Be2 Kg7+–) 19...Kg7 (19...Ke8+–) 20.Rd3 (20.Be2 cb5 21.ab5 Ne5+–) 20...Rad8 (better 20...c5 21.Qc3 Bg4+–) 21.Rd4?? (21.Be2 Qg4 22.Qg4 Bg4+–) 21...cb5?? (better 21...c5 22.Rh4 Qf3 (22...cb4?! 23.Rh5 Rc8 24.d4=; 22...Nh4?! 23.Qh4 Qh4 24.Nh4–/+) 23.Qc5 Qf5 24.Qf5 Bf5–+) 22.ab5 (22.Bb5 a5 23.Qb2 Bb5 24.ab5 Rd4 25.Nd4 Qh4 26.g3 Qh3+–) 22...Rhe8 (better 22...Ne5+–) 23.Rf4?? (better 23.Be2+–) 23...Nf4–+ 24.Qf4 Bb5 25.Nh4 (25.Bb5 Qb5 26.Kf2 a6–+) 25...Bf1 (25...Qc5!? 26.Bb5 Qb5 27.Rf1 Qb1 28.Ke2 Qd3 29.Kf2 Qd2 30.Kg1–+) 26.Nf5 Kh8 27.Rf1 Rc8 (better 27...b5–+) 28.Nh6? (better 28.Rf3–/+) 28...Rc1–+ 29.Kf2 Rf1 30.Kf1 Qd1 31.Kf2 Qd2 32.Kg3 (32.Kf3 Qd5 33.Kf2–+) 32...Qe3 (better 32...Re3 33.Kh4 Rh3 34.Kh3 Qf4 35.Nf7 Kg7–+) 33.Qe3 Re3 34.Kf4 Re7 35.Kf5 (35.Nf5 Rd7 36.Ke3–+) 35...Kg7 36.Ng4 Rc7 (36...Rc7 37.Ne3 a5–+) 0–1. GuestCKQB – GuestTBLH, freechess.org, 2016.

5.g3 d6 6.Bg2 Nf6 7.Ne2 Be7 8.0–0 Rb8 9.d4 e4 10.d5 Ne5 11.Nd2 Bf5 12.a4 Qd7 13.Nd4 Bg6 14.h3 0–0 15.Kh2 Nh5 (15...a6!?+=) 16.f4 ef3 17.N2f3 Nc4 18.Bc3? (better is 18.Bc1=) 18...Ne3–+ 19.Qe2 Nf1 20.Rf1 Rfe8 21.Qf2 Bf6 22.Bd2 Bd4 23.Qd4 Nf6 24.Qa7 Bc2 25.Bc3 Ne4 26.Qd4 Nc3 27.Qc3 Ba4 28.Nh4 (28.Nd4 Ra8 29.Qb4–+) 28...Bb5 29.Nf5 (29.Rf4 Re5 30.Qb3 Be2–+) 29...f6 (29...Re5!? 30.Rf4 Rf5 31.Rf5 Qf5 32.Qc7–+) 30.Nd4 (30.Rf4 Re5 31.Nd4–+) 30...Bf1 31.Bf1 Re5 32.Bg2 Rbe8 33.Nf3 (33.Qb3 b6–+) 33...Re3 34.Qb4 (34.Qc2 Re2 35.Qd3 Qa4–+) 34...Re2 (34...Qf5 35.Ng1–+) 35.Qb7 (35.Nd4 R8e4 36.Qc3 Rg2 37.Kg2 Qa4 38.Qc7 Qd4–+) 35...Qe7 36.Nh4 Rd2 (better is 36...g5 37.Qb4 f5–+) 37.Nf5 (37.Qb5–+) 37...Qe2 (37...Rg2 38.Kg2 Qe2 39.Kg1 Qd1 40.Kg2 Qd2 41.Kf3 Qe2 42.Kf4 Qe4) 38.Nh4–+ g5 39.Qc7 gh4 40.Qd6 (40.Qg7 Kg7 41.g4 Qg2) 40...Qg2 0–1. MasterofDisaster – PsychoCamper, Live Game Caissa's Web, 2004.

4.h4 h5

5.e3 e5 6.Nf3 e4 7.Ng5 Nh4 (7...d5 8.f4–/+) 8.Ne4 (8.Rh4 Qg5 9.Re4 Be7+=) 8...Ng6 (better 8...d5!? 9.Nec3 Bg4=) 9.Rh5+– Rh5 10.Qh5 d5 11.Ng5 Nf6 12.Qf3 Bg4 13.Qg3 (13.Bf6 Qd7 14.Qg3 Bd6+=) 13...Bd6= 14.f4 Bf5 (14...Qe7 15.Kf2=) 15.Bd3 Bd3 16.cd3 Qd7 17.Nc3 (17.Bf6 gf6 18.Nh7 Be7+= (worse 18...Qb5 19.Nf6 Kd8 20.Nc3 Qd3 21.Qg4+–)) 17...0–0–0 (17...Qf5 18.Qh2=+) 18.Nf3 (18.Qh3!? Bf4 19.ef4 Nf4 20.Qd7 Rd7 21.0–0–0+–) 18...Rh8 19.0–0–0 Qg4 (better 19...Kb8!?=) 20.Qg4+– Ng4 21.Nd5 f6 (21...Rh5 22.Nc3 Nf2 23.g4 Ng4 24.Ne4 Bf4 25.ef4 Nf4 26.Bg7 Rb5 27.Kc2+–) 22.Nc3 (22.Kc2 Rh5 23.Nc3 Kd7+–) 22...Ne7 (better 22...Nf2!?+–) 23.Ne4 Kd7 24.Nd6 Kd6 25.Rf1 c6 26.Ba3 Kd7 27.Be7 Ke7 28.bc6 bc6 29.Nd4 c5 30.Nb3 Rb8? (30...Kd6 31.d4 c4 32.Na5+–) 31.Na5 (better 31.Nc5!? Rh8+–) 31...Rb5 32.Nc4 a5 33.Kc2 a4 34.Rb1 (34.Rb1 Rb1 35.Kb1+–) 1–0. FeegLood (2690) – CheckRaiseMate (2335), lichess.org, 2015.

5.e3 e6 6.Nf3 Nh6 7.Bd3 –+. Aasum.

5.e4 e5 =.

5.Nf3 Nf6 6.e3 e5 (6...d5!?=) 7.Ne5+– Ne5 8.Be5 Bb4 9.Bb2 Qe7 (9...d5 10.Be2+–) 10.Nc3 (10.a3 Ba5+–) 10...Rh6 (10...d5 11.Be2+=) 11.Bd3 (11.a3 Bc3 12.Bc3 d5+–) 11...d5+= 12.a3 Bc5 13.Ne2 Ng4? (13...Bg4 14.0–0+=) 14.Rf1?? (better 14.Bg7!? Rd6 15.Nf4+–) 14...Qh4 (14...Ne5+=) 15.g3 (better 15.Bg7!? Re6 16.g3+–) 15...Nh2= 16.Nf4 (16.gh4?? Nf3) 16...Qg4? (16...Qg5 17.Rh1 Bg4 18.Be2 Be2 19.Qe2+=) 17.Be2 (better 17.Rh1 Qd1 18.Kd1+–) 17...Qf5?? (better 17...Qg5 18.Rh1 Ng4=) 18.Rh1+– (worse 18.Bg7 Nf1 19.Bh6 Nh2+–) 18...Ng4 (18...h4 19.Bg7 Rh7+–) 19.Bd3 (19.Bg7 Rh7 20.Bd3 Qg5 21.Bh7 Qg7 22.Nd5 Bd6+–) 19...Qd7? (19...Qg5 20.Nh3 Qd8 21.Bg7+–) 20.Qf3 (20.Bg7 Rb6 21.Rh5 f5 22.Rh8 Kf7+–) 20...c6?? (better 20...g6!? 21.Nd5 f5+–) 21.Nh5 (better 21.Bg7!? Bf8 22.Bh6 Bh6 23.Nh5 Bf8+–) 21...Bd6? (21...Qd6 22.Ng7 Ke7 23.Rh6 Nh6+–) 22.Ng7 (22.Ng7 Kd8 23.Rh6 Nh6 24.Qf6 Be7 25.Qh6+–) 1–0. FeegLood (2225) – Singer__Marta (2270), lichess.org, 2015.

5.Rh3 d6 6.Rb3 Bf5 (6...Nh4 7.e4–/+) 7.Nc3 (7.g3 e5=) 7...Nf6 8.a4 (8.g3!?+=) 8...e5–/+ 9.Nf3 Be7 (9...Be6 10.e4–+) 10.d3 (better is 10.e4!? Be6 11.Nd5–/+) 10...Be6–+ 11.e4 Bb3 12.cb3 a6 (better is 12...d5!?–+) 13.ba6 ba6 14.g3 Qd7 15.Bg2 (15.d4 ed4 16.Nd4 0–0–/+) 15...Nf8 (15...c5 16.Kf1–+) 16.a5 (16.d4 Ng6–/+) 16...Ne6 (16...c5 17.Ng5–+) 17.Ra4 (17.d4 ed4 18.Nd4 Nd4 19.Qd4 Rb8–/+) 17...0–0 18.Rc4 (18.d4 ed4 19.Nd4 Rab8–/+) 18...Nc5 (18...c5 19.Nd5 Rab8 20.Bh3–+) 19.Na4 (better is 19.d4 ed4 20.Nd4–/+) 19...Ne6?? (19...Na4 20.Ra4 Rab8 21.Nd2–+) 20.Qc1?? (20.Nc3 c5 21.Nd5–+) 20...Rab8–+ 21.b4 0–1. kinderchocolate (2235) – birdmove (2310), net–chess.com, 2012.

3.d4 Nc4

4.Nc3 d5 5.e4! e6 6.ed5 ed5 7.Bc4 dc4. Kubiczek.

4.Nc3 e6 5.e4 Na5?! (5...Nb6). Kubiczek.

4.e3?! d5 5.Bc4 dc4 6.Qe2 Be6 7.Nd2 Qd5 8.Ngf3 c3?? (8...Qb5 9.Rb1 Qa6 10.d5 Bd7 11.Qc4! Qc4 12.Nc4 0–0–0 13.Nfe5 Be8 14.e4 f5! 15.f3 Nf6 16.Nd2!) 9.Nb1! Kubiczek.

4.e3 Ne3 5.fe3 d5 6.c4 Nf6 7.Nc3 e6 8.cd5 Bb4 9.Bd2 Ba3? (better is 9...ed5 10.Nf3 Bf5+–) 10.de6 Be6 11.Nf3 0–0 12.Be2 Qd6 (12...Bb2 13.Rb1 Bc3 14.Bc3 Ba2 15.Ra1+–) 13.0–0 Ng4 (13...Bb2 14.Rb1 Bc3 15.Bc3 Ba2 16.Bb4+–) 14.h3 Nh6 15.Ne4 Qd8 16.Qc2 b6 (16...Bf5 17.Bd3+–) 17.Neg5 Nf5 (17...Bf5 18.Bd3 Bg6 19.Bg6 hg6 20.Qd3+–) 18.Ne6 (better is 18.g4 Qf6 19.gf5 Bf5 20.e4+–) 18...Qd7 (18...fe6 19.Bc4 Ng3 20.Be6 Kh8+–) 19.Nf8 Rf8 20.Qb3 (better is 20.Bd3 g6 21.Ne5 Qe6+–) 20...Bd6 21.Bc4 Ng3 22.Rf2 c6 (22...Ne4 23.Re2+–) 23.bc6 Qc7 (23...Qe7 24.Qd3+–) 24.Ng5 h6 25.Nf7 Ne2 26.Be2 Bh2 27.Kh1 Qg3 28.Ng5 (28...Rf7 29.Qf7 Kh8 30.Qf8) 1–0. KHW – Sincerely Sam, ChessWorld.net, 2003.

4.e4+= a6?? 5.Bc4+– c6 (5...ab5 6.Bb5 c6 7.Bd3+–) 6.Qf3 (6.ba6 ba6 7.Nf3 d5+–) 6...ab5 (6...d5 7.ed5 cb5+–) 7.Qf7 (7.Bf7?!=) 1–0. Trkn – ALF Carballo, itsyourturn.com, 2000.

4.e4+= Nd6 5.Bd3 a6 +=.

4.e4 Nd6 5.e5 Ne4 6.Bd3 d5 (6...d6 7.Be4 de5 8.de5 Qd1 9.Kd1 Bg4 10.Nf3 0–0–0 11.Ke2 h5+–) 7.Ba3?? (better is 7.f3 e6 8.fe4 de4 9.Bc4+–) 7...e6 (better is 7...c5!? 8.bc6 bc6+=) 8.Bf8+/– Kf8 9.Nf3 Ngf6? (better is 9...a6+/–) 10.ef6+– Qf6 11.0–0 Bd7 (11...Kg8 12.Ne5+–) 12.Ne5 c6 (12...Be8+–) 13.Nd7 Ke7 14.Nf6 Nf6 15.Re1 (15.Qd2 c5+–) 15...g6 16.c4 (16.bc6 bc6 17.Qf3 Rhb8+–) 16...Rad8 17.cd5 (17.bc6!? dc4 18.Bc4 bc6+–) 17...Rd5 18.Bc4 Rd6 19.Nc3 Rhd8 20.Ne2 (20.Qe2 Kf8 21.Qe5 Ng8+–) 20...c5 21.Nf4 Rd4 22.Qb3 R4d6 23.Rad1 Kf8 24.Rd6 Rd6 25.Ne6 fe6 26.Be6 b6 27.g4 h6 28.Qf3 Kg7 29.h4 c4 30.g5 Nh7 31.Qf7 Kh8 32.Qg8 1–0. Knight – Master1, mySchach.de, 2004.

4.e4+= Nd6 5.e5 Nf5 6.g4 (6.Nf3 d6+=) 6...Nh4 (6...Nfh6 7.Bd3 d6 8.g5=) 7.Bg5 Ng6 8.Bd3 (8.h4 f6 9.Bd2 e6+=) 8...h6 (8...d6!? 9.f3 de5 10.Bg6 hg6 11.de5 Qd1 12.Kd1 e6=) 9.Bd2 (9.Bc1 e6+=) 9...Nh4 (9...d6 10.Bg6 fg6 11.Nc3=) 10.Nf3+= e6 11.c4 (11.0–0 Nf3 12.Qf3 Qh4+=) 11...b6 (11...d6!?+=) 12.Nh4+/– Qh4 13.Qf3 Rb8 14.Be4 d5 (14...a6 15.Nc3+/–) 15.cd5 Bb7?? (15...Ne7 16.Nc3 ed5 17.Nd5 c5 18.dc5 Nd5 19.Bd5 Qe7+–) 16.de6+– f6 (16...fe6 17.Bb7 Ne7 18.Nc3+–) 17.Bb7 (17.Bc6 Kd8 18.Qd5 Bd6 19.ed6 Qf2 20.Kf2 a5 21.dc7 Ke7 22.Qd7 Kf8 23.Qf7) 17...fe5 (17...Ne7+–) 18.Qf7 1–0. mtra – plabrado, internet, 2002.

4.e4 e5?? 5.Bc4+– ed4 6.Qd4 Nf6 (6...Qf6 7.Be3+–) 7.e5 Nh5 (7...Ng8 8.Nf3 d6 9.Ng5+–) 8.g4 c5 (8...d5 9.ed6 (9.gh5?! dc4 10.Qd8 Kd8+–) 9...Qf6 10.c3 Qd4 11.cd4 Bg4 12.dc7+–) 9.Qd5 Qe7 10.Ne2 f6 (10...d6 11.ed6 Qe6 12.gh5 Bd6 13.Bb2 Qd5 14.Bd5+–) 11.gh5 fe5 12.Nbc3 d6 (12...Qf6 13.Ne4 Qe6 14.Qd3+–) 13.Rg1 Be6 (13...Qc7+–) 14.Qe6 Qe6 15.Be6 Be7 16.Rg7 a6 17.Nd5 Bf8 18.Rd7 Rd8 (18...Bg7 19.Nc7 Kf8 20.Rf7 Kg8 21.Rf6) 19.Nf6 1–0. pierre – Pools, ChessWorld.net, 2005.

4.e4 e5?? 5.Bc4+– ed4 6.Qf3 Be7 7.Qf7 1–0. GuestRZYX – GuestKXSV, freechess.org, 2019.

4.e4 e5?? 5.Bc4+– ed4 6.Qf3 Nf6 7.Ne2 c5+–.

4.e4 e5?? 5.Bc4+– ed4 6.Nf3!? Bb4 7.Kf1 Bc5+–.

4.e4+= e6?? 5.Bc4+– d5 6.ed5 ed5 7.Bd3 Ne7 (7...Bd6 8.Nf3+–) 8.Nf3 a6 (8...Bf5 9.0–0+–) 9.ba6 ba6 10.0–0 Nc6 (10...Bg4 11.Nbd2+–) 11.Re1 Be7 12.c4 0–0 13.cd5 Qd5 (13...Nb4+–) 14.Be4 Qb5 (14...Qd7 15.Bc6 Qc6 16.Re7+–) 15.a4 Qb6 16.a5 Qb5 17.Bc6 Qc6 18.Re7 Bb7 19.Bf4 Rae8 (19...Rac8 20.Qb3+–) 20.Rc7 Qb5 (20...Qf6 21.Rb7 Qf4 22.Nc3+–) 21.Ne5 (better is 21.Nbd2 Bf3 22.Qf3 Qb2+–) 21...Bd5 (21...Qd5 22.f3 Bc8 23.Nc6+–) 22.Nc3 Qb8 (22...Bb3 23.Nb5 Bd1 24.Rd1 ab5 25.Nd7+–) 23.Nd5 f6 24.Qg4 Qb2 25.Qg7 1–0. guest128 – Mississippian, ICC, 1999.

4.e4 Nf6?? 5.Bc4+– Ne4 6.Bd3 (6.Bf7 Kf7 7.Qh5 g6 8.Qd5 Ke8 9.Qe4 Bg7+–) 6...Nd6 (6...d5 7.Qf3+–) 7.Nf3 e6 8.0–0 Qf6 (8...Be7+–) 9.Bg5 1–0. DEFFM – GuestQVXQ, freechess.org, 2017.

4.Nf3?! d5 5.e3 Nd6! 6.Ne5 Bf5 7.g4 Bg6 8.h4 h6? 9.Ng6! fg6 10.Bd3! Kf7?! 11.Qf3! Nf6! Kubiczek.

4.e4 d5

5.Nc3 e5 6.Nd5+– Nb6 (6...Nd6!? 7.Ba3 Be6 8.de5 Ne4 9.Bf8 Kf8+–) 7.de5+– Nd5 (7...Be6 8.Bg5 Bb4 9.Nb4 Qg5 10.Nf3+–) 8.Qd5 Qd5 (8...Be6 9.Qd8 (worse 9.Qb7 Bb4 10.Ke2 Rb8=+) 9...Rd8 10.Nf3+–) 9.ed5 h6 (9...Ne7 10.Bc4+–) 10.Be2 (10.Bd3 Bc5 11.Be3 Bb4 12.Bd2 Bc5+–) 10...Bb4 (10...Ne7 11.Bf3+–) 11.Bd2 Bd2 (11...Bc5 12.Nf3+–) 12.Kd2 Ne7 13.c4 a6 (13...Bf5 14.Nf3+–) 14.d6 cd6 (14...Ng6 15.dc7 Kd7 16.b6+–) 15.ed6 Nf5 (15...Ng8 16.b6+–) 16.c5 0–0 (16...ab5 17.Nf3+–) 17.Nf3 (17.ba6 ba6 18.Nf3 Rd8+–) 17...Bd7 (17...Rd8 18.Ne5+–) 18.Rhb1 (18.ba6 ba6 19.g4 Nd6 20.cd6 Rfd8+–) 18...g5 (18...ab5 19.Bb5 Be6 20.Be2+–) 19.Ne5 (better 19.ba6 ba6 20.Rb6 Rfb8 21.Rb8 Rb8 22.Ba6 Bc6+–) 19...Rfd8 (19...Bb5 20.Bb5 (20.Rb5?! ab5 21.Bb5 Rfc8+–) 20...ab5 21.Rb5+–) 20.Nd7 (20.ba6 ba6 21.Nd7 Rd7+–) 20...Rd7 21.Bg4 ab5 (21...Rd6 22.cd6 Nd6 23.ba6 ba6+–) 22.Bf5 Rdd8 23.Rb5 Ra7 (23...Ra4 24.Kd3 Ra3 25.Kc4+–) 24.a4 (24.Be4 Rd7+–) 24...Kg7 (24...Rda8 25.a5+–) 25.Be4 f6 (25...Rd7 26.a5+–) 26.Rb7 Rb7 27.Kc3 (better 27.Bb7 Rd7 28.Bc6+–) 27...Ra7 28.Kc4 Ra6 (28...Kf8 29.a5+–) 29.a5 (better 29.Bb7 Ra7 30.c6 Rd6+–) 29...Re8 (29...Ra7 30.a6 Rdd7 31.Kb5+–) 30.f3 (30.Bb7 Ra7 31.c6 Kf7+–) 30...Rd8 (30...Kf7 31.Bd5 Kg6 32.Bb7+–) 31.Bb7 Ra7 32.a6 Re8 (32...Kf7+–) 33.d7 Rf8 34.c6 Rf7 35.d8Q f5 36.c7 g4 (36...Ra8 37.Ba8 Rf8 38.Qe7 Rf7 39.Qe5 Kh7 40.c8Q g4 41.Qch8 Kg6 42.Qe6 Rf6 43.Qef6 Kh5 44.Qhh6) 37.c8Q gf3 (37...Rab7 38.Qh8 Kg6 39.Qe6 Rf6 40.Qef6 Kh5 41.Qhh6) 38.Qh8 Kg6 39.Qcg8 Kh5 (39...Rg7 40.Qgg7 Kh5 41.Qhh6) 40.Bf3 Kh4 41.Qh6 1–0. Trkn – Dallas2000, itsyourturn.com, 2001.

5.Nc3 e6 6.a3 a6 7.ba6 (7.Bc4 dc4 8.Bf4 Bd7 9.Qb1 Bd6 10.Nge2 Bf4=; 7.ed5 ed5 8.Bc4 dc4 9.Qe2 Ne7 10.Qc4 Be6=) 7...Ra6 8.Bc4 dc4 9.Nf3 Nf6 10.Qe2 Bb4 =.

5.Nc3 e6 6.Rb1 A) 6...Nb6 A1) 7.Nf3 Nf6 (7...de4 8.Ne4 Qd5 9.Nc3 Qd8 10.Bd3 Nf6+=) 8.e5 Ne4 9.Qd3 f5 10.ef6 Nf6+=; A2) 7.e5 Ne7 (7...Qd7 8.Be2 Ne7 9.Nf3 Qd8 10.a4 Nf5+=) 8.Nf3 Ng6 9.Bd3 Be7 10.h4 f5+=; B) 6...Nf6 7.Bc4 dc4 8.Nf3 a6 9.Bf4 Nh5 10.Bg5 f6+=; C) 6...Na3 C1) 7.Rb2 Be7 (7...Nf6 8.Bg5 h6 9.Bf6 Qf6 10.ed5 Qe7+=) 8.e5 a6 9.Qg4 g6 10.ba6 b6=; C2) 7.Rb3 Nc4 8.Nf3 de4 9.Ne4 Nd6 10.Bd3 Ne4+=.

5.Nc3 e6 6.Bc4 dc4 7.Rb1 (7.Nf3 a6 (7...Bb4 8.Bd2 Nf6 9.Qe2 a6 10.ba6 Ra6+=) 8.ba6 b6 9.0–0 Ba6 10.Rb1 Nf6+=; 7.Nge2 Be7 8.Rb1 a6 9.Bf4 Nf6 10.ba6 Ra6+=) 7...a5 (7...Nf6 8.Nf3 a6 9.Bf4 Nh5 10.Bg5 f6+=; 7...a6 8.ba6 Ra6 9.Nf3 c6 10.Ne5 b5=) 8.Nf3 (8.Nge2 Qh4 9.Ng3 Bb4 10.Bd2 Nf6+=) 8...h6 (8...Bb4 9.Bd2+= Nf6 10.Qe2 b6+/–) 9.a3+/– a4 (9...Nf6 10.Qe2 Bd7+/–) 10.Qe2 Nf6 (10...b6+–) 11.Qc4 b6 12.Ne5 Bb7 13.Nc6 Qc8 14.f4 Bc6 15.Qc6 Nd7 16.f5 e5?! (16...ef5 17.0–0 Ra7+–) 17.de5 Kd8 18.Bf4 Ba3 19.e6 (19.Rd1 Ra7 20.e6 Bd6 21.Bd6 cd6 22.Rd6 Qc6 23.bc6 Ke7 24.Rd7 Rd7 25.ed7 Kd6 26.Na4 Kc6+–) 19...Nf6 (19...fe6 20.fe6 Nf6 21.Bc7 Ke7 22.Nd5 Nd5 23.ed5+–) 20.Bc7! Qc7 (20...Ke7 21.e5 (21.Qb6?! fe6 22.0–0 Rf8+–) 21...fe6 22.ef6 gf6 23.Qb6+–) 21.Rd1 Kc8 22.Qa8 Qb8 23.Qa4 Be7 (23...Bb2 24.Qb3 Qe5 25.Ne2 Ne4 26.Rd5 Bc3 27.Nc3 Qc3 28.Qc3 Nc3 29.Rd6 Nb5 30.Rb6+–) 24.ef7 Nd7 (24...Bc5 25.Qa6 Kc7 26.Rd3+–) 25.Qa6 Kd8 26.Qa2 Bb4 27.Rd7! Kd7 28.Qe6 Kd8 29.Ke2 Kc7 30.Nd5 Kb7 (30...Kd8 31.Nb4 Kc7 32.Na6 Kb7 33.Nc5 bc5 34.Qc6 Ka7 35.Ra1) 31.Qc6 Ka7 32.Ra1 Ba5 33.Ra5! ba5 (33...ba5 34.Qa6) 34.Qa6 1–0. michaelbuss – Garyman, ChessWorld.net, 2005.

5.Bc4 dc4 6.c3 e6 (6...e5!?=) 7.Qa4 Bd7 (7...Qh4 8.Nd2+=) 8.Qc4 Be7 (8...Nf6 9.Bg5+/–) 9.Bf4 (9.Ba3 c6+/–) 9...Rc8 (9...c6 10.bc6 Bc6 11.Nd2+=) 10.a4 (10.Be5 Nf6 11.Qe2 c5+=) 10...c6+= 11.Qb3 (11.Qe2+=) 11...b6 (11...Qa5!? 12.b6 Qb6 13.Qb6 ab6+=) 12.Nf3+/– c5 13.d5 ed5 14.ed5 h6 (14...c4 15.Qd1+/–) 15.d6 (15.0–0 c4 16.Qd1 Bg4+–) 15...Bf6 (15...Bg5 16.Bg5 hg5 17.0–0+–) 16.0–0+– Be6 17.Qc2 Qd7 (17...g5 18.Bg3+–) 18.Rd1 (18.Re1 Kd8+–) 18...g5 19.Ne5 Be5 20.Be5 f6 21.Bg3 (21.Qg6 Qf7 22.d7 Bd7 23.Qf7 Kf7 24.Rd7 Ke6 25.Ra7 Ke5+–) 21...Bf5 (21...h5 22.f3+/–) 22.Qe2 Kd8 23.Re1 h5 24.h3 h4 25.Bh2 Nh6 (25...g4 26.a5 c4 27.ab6 ab6 28.Ra7 Qb5 29.d7 Bd7 30.Rd1+– (30.hg4?! Rh7 31.Rd7 Qd7+–)) 26.Qe7 (26.Nd2 Re8 27.Qe8 Qe8 28.Re8 Ke8+–) 26...Qe7 27.Re7 (27.de7!? Ke8 28.Nd2 Bd3+–) 27...Rh7+/– 28.Re1 (28.Re3 g4+/–) 28...Kd7 (28...Rd7 29.Na3+/–) 29.Na3 (29.a5 Re8 30.Re8 Ke8 31.ab6 ab6 32.Ra8 Kf7+–) 29...Be6 (29...g4 30.hg4 Ng4 31.Rad1+/–) 30.Rad1 (30.Nc2 Rhh8+–) 30...Rg7 31.Re3 (31.Kf1 g4 32.Bf4 Nf7 33.hg4 Rg4+=) 31...g4+= 32.Rde1 (32.Kf1!?+=) 32...Re8= 33.Nc4? (better is 33.Kf1 Nf7 34.Bf4+=) 33...gh3–+ 34.g3 hg3 35.Rg3? (better is 35.fg3 Rgg8 36.Nd2–+) 35...Rg3 36.Bg3 Bc4 37.Rd1 (37.Re8 Ke8 38.Kh2 Be6–+) 37...Nf5 (37...Ng4 38.f3 Re3 39.fg4 Rg3 40.Kh2 Rc3 41.Rd2–+) 38.Bf4 (38.Kh2 Rh8 39.Bf4–+) 38...Re4 39.Bh2 Rg4 40.Kh1 (40.Bg3 Ng3 41.fg3 Rg3 42.Kh2 Rc3–+) 40...Nd4! 41.cd4 Theme: Interference (41.Rd4 cd4) 41...Bd5 The nicest combinations are those leading to mate 0–1. michas – Rickytan (1640), internet, 2007.

5.Bc4 dc4 6.f4 Nf6 7.Nc3 Bg4 8.Qd2! e6 9.a3 Be7? 10.h3! Kubiczek.

5.Bc4 dc4 6.Bf4 Nf6 7.Nc3 e6 +=.

5.Qd3!? Nb6 6.ed5 Qd5!? Kubiczek.

5.Qe2 Nb6 =.

5.Nc3 Nb6

6.a4 de4

7.d5?? e6 (better is 7...Nf6!?–+) 8.de6+= Qd1 9.Kd1 Be6 10.Ne4 0–0–0 11.Bd2 f5 12.Ng5 Bd5 13.Kc1 h6 14.N5f3 Nf6 15.Bd3 Be4 16.Ne1 Bc5 (16...Bd3 17.cd3 Bc5 18.a5–/+) 17.f3 (17.a5 Na8 18.f3 Bd3 19.Nd3 Bd4=) 17...Bd3–/+ 18.cd3 Nbd5 19.Ne2 g5 (19...Rhe8 20.Kd1–/+) 20.d4 Bd6 (20...Bd6 21.a5 a6 22.ba6 ba6+=). Henryk Kubiczek.

7.Ne4?! Bf5 8.Ng3 Bg6 9.c4 e6 10.c5 Nd5 11.Qb3! Ngf6 12.Bc4 Be7 13.N1e2 0–0 14.0–0 c6! 15.Rd1 Qc7. Kubiczek.

7.a5 Nd5

8.Ne4 c6 9.c4 Nc7 10.Ba3 f5!? 11.Nc3 Nf6 12.Nf3 g6 13.Ne5 cb5 14.cb5 Be6! 15.Be2 Bg7 16.0–0 0–0 17.Bf3 Ncd5. Kubiczek.

8.Ne4 e6 9.Nf3 Bb4 (9...Ngf6 10.Nf6 Qf6 11.c4+=) 10.Bd2+= Ngf6 11.Ng3 Nc3 12.Qc1 Bd7 13.Qb2+/– Nfd5 14.Bc4 Qe7 15.Ne5 Bb5 (15...a6 16.ba6 ba6 17.0–0+=) 16.Bb5+/– Nb5 17.Bb4?? (better is 17.c4 Bd2 18.Qd2+/–) 17...Qb4–/+ (worse is 17...Nb4 18.c3 f6 19.Qb4 Qb4 20.cb4 fe5 21.de5=) 18.Qb4 Nb4 19.Rb1?? (19.0–0–0 b6–/+) 19...Nd4?? (better is 19...Nc2 20.Kd2 Ncd4–+) 20.c3–/+ Ndc2 (20...Ndc2 21.Kd2 Rd8 22.Kc1 c5=; better is 20...Ndc6!? 21.Rb4 Ne5 22.Rb7 0–0–0–/+). Henryk Kubiczek.

8.Ne4 f5? 9.Ng3 Ngf6 +=.

8.Ne4 f5? 9.Ng5 Ndf6 10.Bc4! Nh6 11.Ne6 Be6 12.Be6 Qd6 A) 13.d5 Qb4? 14.Bd2 Qb5 15.Rb1 Qa6 16.Bh6! gh6 17.Qd2 Bg7! A1) 18.Ne2 Ne4! 19.Qb4 b6! 20.c4?? (20.Qa4? Kf8! 21.Bf5? Qe2!!) 20...Nc5!; A2) 18.Bf5? Qc4 19.Be6!? Ne4!; B) 13.Bh6? Qe6! 14.Be3 f4!

8.Ne4 f5? 9.Ng5 Ngf6 10.c4 Nb4 11.N1f3 (11.Bd2 e6 12.Ra4 c5+/–) 11...e6 (11...e5 12.de5 Qd1 13.Kd1+/–) 12.Qb3 (12.Ra4 h6 13.Bd2 hg5 14.Bb4 Bb4 15.Rb4 c5 16.bc6 Qa5+=) 12...c5 13.Bd2 h6 (13...Ne4 14.Bb4 cb4 15.Qe3 Ng5 16.Ng5+=) 14.Nh3 g5 (better is 14...Ne4 15.Bb4 cb4+/–) 15.Ne5?? (better is 15.dc5!? g4 16.Bb4 gh3 17.g3+–) 15...Bd6 (15...g4 16.dc5 Bc5=) 16.f4 Ne4 17.Bb4 cb4 18.c5?? (18.Qd1 0–0 19.c5 Be5 20.de5 gf4 21.Nf4+=) 18...Be5–+ 19.de5 (19.fe5 Qd4 20.Ra2–+) 19...Qd4 (19...Qd2) 20.Rd1–/+ Qc3?? (20...Qc3 21.Qc3 bc3+=; better is 20...Qc5 21.Qd3 gf4–/+). Henryk Kubiczek.

8.Ne4 Bf5 9.Bd3 Nb4 10.Ne2 Nd3 11.Qd3 e6 12.0–0 Nf6 13.f3! Be7 14.c4.

8.Ne4 Bf5 9.Ng3 Bg6 10.Bd2 e6 11.Nf3 Ngf6 (11...Nb4 12.Rc1=) 12.Be2 (12.Ne5 Bd6+=) 12...Bd6 13.0–0 0–0 14.c4 Nf4 15.c5 (15.a6 ba6 16.Ra6 Ne4+=) 15...Ne2= 16.Qe2 Bg3 17.fg3 Be4 18.Bc3 Qd5 19.Nd2 Bf5 20.h3 Rad8 The backward pawn on d4 becomes a target (20...Rad8 21.a6 b6=). Henryk Kubiczek, 1993.

8.Ne4 Bf5 9.Ng3 Bg6 10.Bd2 e6 11.Nf3 Ngf6 (11...Nb4 12.Rc1=) 12.Be2 (12.Ne5 Bd6+=) 12...Bd6 13.0–0+= 0–0 14.c4 Nf4 15.Ne5 Ne2 16.Qe2 Be5 17.de5 (17.Qe5 Nd7 18.Qe3+=) 17...Nd7?? (better is 17...Bd3 18.Qe3 Bf1 19.Nf1 Nd7–/+) 18.Bb4+/– Re8 19.Rad1 Qc8 20.c5 (20.Rd2 c5 21.Bc3 Qc7+/–). Henryk Kubiczek.

8.Ne4 Ngf6 9.Bd3 e5! 10.Nf6 Qf6. Kubiczek.

8.Ne4 Ngf6 9.Nf6 Nf6 10.Nf3 Bg4 11.Be2 Ne4 12.Qd3 f5 13.h3 Bh5 14.0–0 e6 15.Bf4 Bd6 16.Ne5 Be2 17.Qe2 Be5 18.Be5 0–0 19.c4! c6 20.f3 Nf6 21.Rfd1.

8.Ne4 Ngf6 9.Ng3 =.

8.Ne4 g6 9.Nf3 Bg7 10.Bb2?! c5! 11.c3 cd4 12.cd4 Ngf6 13.Nc5 0–0 14.Bc4 Nc5 15.dc5 Qd1 16.Rd1 Bg4 17.Be2 Rad8!

8.Nd5 Qd5

9.Bb2 f5 10.f3 Nf6 11.c4 Qf7 12.Rc1 b6 13.a6 e6 14.Bc3 Bd6 15.Qd2 Bd7 (15...ef3 16.gf3! Nh5 17.Nh3! h6 18.f4! Nf6 19.Nf2! c5! 20.bc6 Ba6 21.Rg1). Kubiczek.

9.Bb2 Nf6 10.c4 Qd6 11.Qb3 e6 12.c5 Qd5 13.Qe3 +=.

9.Bb2 Nf6 10.c4 Qd6 11.Qb3! g6 12.c5 Qf4 13.Bc4! e6 14.Ne2 Qg4 15.0–0!? (15.d5 ed5 16.Bd5 Bg7 17.Bf7 Ke7 18.Bc4 Qg2 19.Rg1 Qh2) 15...Bg7 16.Ng3! Kubiczek.

9.c3 Nf6 +=.

9.c4 Qd8 10.Ba3 (10.c5 e5 11.Be3 ed4 12.Qd4 Qd4 13.Bd4 Nh6+=) 10...Nf6–/+ 11.f3 g6 (11...a6 12.ba6 Ra6 13.Bb4–/+) 12.Bb2+= Bg7 13.Qc2 ef3 14.Nf3 Bf5 15.Bd3 Bd3 16.Qd3 0–0 (16...a6 17.0–0+=) 17.0–0 (17.a6 Qc8=) 17...Nd7 (17...a6 18.Ne5+=) 18.Rad1 a6 19.Bc3 e6 20.Qe4 Qc8 (20...Qc8 21.Bb4 Re8=). Henryk Kubiczek.

9.Be3 Nf6 10.c4 Qf5 11.Ne2 Ng4 12.Ng3 (12.Qb1 e5+=) 12...Qg6 13.Bf4 (13.Qd2+=) 13...c6 (better is 13...e5!? 14.Bc1 Bb4 15.Bd2 Qd6–/+) 14.Qd2 (14.Qb1 c5 15.h3 Qf6 16.Qe4 Nf2 17.Kf2 g5+=) 14...f5 (14...e5!? 15.Be5 Ne5 16.de5 Bg4+=) 15.Be2= h5 16.h3 (16.bc6 Qc6 17.h3 Nf6+=) 16...Nf6= 17.Bg5 (better is 17.0–0!?=) 17...Nh7?? (17...Nh7 18.Bh5 Qh5 19.Nh5 cb5 20.cb5 Bd7+–; better is 17...h4 18.Nf1 cb5 19.cb5 Nd5–/+). Henryk Kubiczek.

9.f3 Nf6 10.Be3 Qd6 11.Qd2? ef3 12.gf3! (12.Nf3? Ne4! 13.Qd3! Bf5?! 14.Nh4! Qb4? 15.c3! Qb2 16.Rc1! Be6) 12...e5? 13.de5 Qe5 14.Rd1 Be6 15.Be2 Nd5 16.Bd4! Qh5 17.h4! Bd6! Kubiczek.

7.a5 Nd7

8.Ne4 c6 9.c4 e6 10.Nf3 Bb4 11.Bd2 Qe7?! 12.c5! Bd2 13.Qd2 Ngf6 14.Nd6 Kf8 15.Bc4 Nd5 16.0–0 N7f6? 17.Ne5! Kubiczek.

8.Ne4 f5? 9.Ng5 Ndf6 10.Bc4! Nh6 11.Ne6 Be6 12.Be6 Qd6 13.d5 (13.Bh6? Qe6! 14.Be3 f4!) 13...Qb4? 14.Bd2 Qb5 15.Rb1 Qa6 16.Bh6! gh6 17.Qd2 Bg7! 18.Ne2 (18.Bf5? Qc4 19.Be6!? Ne4!) 18...Ne4! 19.Qb4 b6! 20.c4?? (20.Qa4? Kf8! 21.Bf5? Qe2!!) 20...Nc5! Kubiczek.

8.Ne4 Ngf6 9.Nf6 (9.Bd3 e5! 10.Nf6 Qf6) 9...Nf6 10.Nf3 Bg4 11.Be2 Ne4 12.Qd3 f5 13.h3 Bh5 14.0–0 e6 15.Bf4 Bd6 16.Ne5 Be2 17.Qe2 Be5 18.Be5 0–0 19.c4! c6 20.f3 Nf6 21.Rfd1. Kubiczek.

8.Ne4 g6 9.Nf3 Bg7 10.Bb2?! c5! 11.c3 cd4 12.cd4 Ngf6 13.Nc5 0–0 14.Bc4 Nc5 15.dc5 Qd1 16.Rd1 Bg4 17.Be2 Rad8! Kubiczek.

5.ed5! Qd5

6.Qd3 Nb6 7.c4 (7.Nf3 Bg4 8.Be2 e6 9.c4 Qf5 10.Qb3 Nf6 11.Nbd2 c5) 7...Qf5! 8.Qc3 Nf6 9.Nf3 Ne4! 10.Qc2 Ng3!? 11.Bd3!! Kubiczek.

6.Nc3! Qe6

7.Be2 Nf6 8.Qd3 Nd6 9.Nf3 +=.

7.Be2 h6? 8.Nf3+– Nb6 9.0–0 Nf6 10.a4 g5 (10...Nbd5 11.Nd5 Qd5 12.Ne5+–) 11.Re1 g4 (11...Nfd5 12.Nd5 Qd5 13.a5+–) 12.Bd3 Qd6 13.Ne5 h5?? (13...Bg7 14.Ba3 Qd8+–) 14.Ba3 Qd8 15.Ng6! g3 (15...fg6 16.Bg6 Combination) 16.hg3 (16.Nh8 gf2 17.Kh1 fe1Q 18.Qe1 Qd4–/+) 16...Rh6 (16...Bg4 17.Ne7 Be6+– (17...Bd1?? 18.Nc6 Be7 19.Be7+–)) 17.Be7 Qd7 (17...Be7 18.Re7 Qe7 19.Ne7 Ke7+–) 18.Bf8 Kd8 19.Ne5 Qd4 20.Nf7 Kd7 21.Re7# 1–0. BlackDemon (2610) – lakshya, FICS rated standard game, 2013.

7.Be2 Nb6

8.Nf3 Bd7 9.a4 Nh6 (9...0–0–0 10.0–0+=) 10.0–0 (10.a5 Nc8+/–) 10...g6 (10...0–0–0!?+/–) 11.a5 Nc8 (11...Nd5 12.Nd5 Qd5 13.Ne5+–) 12.Na4 (12.a6 ba6 13.Ra6 Nd6+–) 12...Bg7 (12...Nd6!? 13.Nc5 Qf5+–) 13.Nc5 White prepares the advance a6 13...Qf6 14.Ne5 Bf5 15.Bf3 (15.g4 b6 16.Na6 Qd6 17.Bh6 Bh6+–) 15...Nd6 16.a6 (16.a6 Nb5 17.ab7+–) 1–0. Martello,Juan Alberto – Dubleumortier,Alain, corr 3GMM–37, 1995.

8.Nf3 Nf6 9.a4 a5 10.0–0 Ne4?! 11.Ne4 Qe4 12.c4! Bg4 13.Be3 e6 14.Bd3! Bf3 15.Be4! Bd1 16.Bb7? (16.Rfd1 Rb8 17.c5 Nd5 18.Bd2 b6 19.Bd5 ed5 20.Re1 Kd8 21.Re5!) 16...Be2 17.Ba8 Na8 18.Rfe1 Bc4. Kubiczek.

8.Bf4 c6 +=.

3.d4 Ng4

4.e4+= d6 5.Be2 N8f6 (5...N4f6 6.Nc3=) 6.f3 (6.h3 Nh6 7.Nc3 e6+=) 6...Nh6 7.Bh6 (7.Nc3 e6+=) 7...gh6= 8.Nc3 Rg8 9.g3 Bd7 (9...Bg7 10.f4+=) 10.e5 de5 (10...Nh5 11.f4 Ng7 12.Bf3+=) 11.de5+/– Nh5 12.f4 Ng7 13.Nf3 (13.Qd3 Bf5 14.Qd8 Rd8+/–) 13...Nf5+= 14.Ne4 (14.Qd2+=) 14...Ne3 (14...c6!? 15.Nc5 Qa5 16.Qd2 Qd2 17.Kd2 0–0–0 18.Nd7 Rd7 19.Kc3 Ne3+/–) 15.Qd3+/– Ng2? (better is 15...Nf5+/–) 16.Kf2+– Bf5 (16...Bh3+–) 17.Kg2 1–0. Wall,Bill – JuJuRizal, internet, 2000.

4.e4 d6 5.h3 N4f6 6.Nc3 e5 (6...e6 7.Be2=) 7.de5+– de5 8.Qd8 Kd8 9.Nf3 Bd6 10.Bc4 Bb4 (10...Bb4 11.Bd2 Nh6+–). ccdd5 – Ronan mac, ChessWorld.net, 2006.

4.f3 N8f6? 5.fg4+– b6 (5...d5 6.g5 Ne4 7.Nf3+–) 6.g5 (better is 6.Nf3+–) 6...Nd5 (6...Ne4+–) 7.e4 Nb4 (7...e6 8.ed5 ed5 9.Qe2 Qe7 10.Bf4+–) 8.a3 Nc2 (8...Bb7 9.ab4 Be4 10.Nf3+–) 9.Qc2 g6 (9...Bb7 10.Nf3+–) 10.Bc4 (10.Bf4 d6+–) 10...a5 (10...a6 11.Bd5 Ra7 12.Nc3+–) 11.a4 (11.Nf3 Bb7+–) 11...e6 12.Nf3 h5 (12...Bb4 13.Bd2+–) 13.0–0 (13...Bb7 14.Bf4+–) 1–0. pumpkin (2305) – tibet, net–chess.com, 2006.

3.d4 Ng6

4.Bb2 a6 5.a4 ab5 6.ab5 Ra1 7.Ba1 b6 (7...d5 8.Nf3=) 8.e3 Bb7 9.c4 (9.Nf3 e6=) 9...e5 (9...Qa8 10.Nc3=) 10.d5 f5 11.Qd3 e4 12.Qd4 (12.Qd2 Nf6=) 12...c5 (12...Nf6 13.Ne2=+) 13.dc6 dc6 14.Qd8 Kd8 15.bc6 Bc6 16.Bd4 h5 (16...Kc7!?=) 17.Bb6+= Kd7 18.c5 N8e7 19.Nc3 (19.Ne2 Nd5 20.Nd4 Nb6 21.cb6 Bb4 22.Ke2 Rb8=) 19...f4 (19...Nc8 20.Nge2 Nb6 21.cb6=) 20.Bb5 (20.Nge2!? Nc8 21.g3 (< 21.ef4 Nb6 22.cb6 Bc5+=; 21.Nf4?! Nf4 22.ef4 Nb6 23.cb6 Bb4=) 21...Nb6 22.cb6 fe3 23.Bh3 Ke8 24.fe3+/–) 20...Bb5= 21.Nb5 fe3 (21...Nd5 22.Nh3 Bc5 23.Bc5=) 22.fe3 Nf5 (22...Nd5 23.Ne2 Nb6 24.cb6=) 23.Ne2 (23.Ke2!?+/–) 23...Ne3+= 24.Kf2 (better is 24.Nbc3 Nc4 25.Ne4 Nb6 26.cb6+=) 24...Nf5? (better is 24...Nc4!? 25.Rd1 Kc8+=) 25.Rd1+/– Kc6 26.Nbd4 (26.Nec3 Ne5 27.Na7 Kb7+–) 26...Nd4 27.Nd4 (27.Rd4?! Ne5 28.Re4 Nd3 29.Kf3 Nc5 30.Bc5 Bc5 31.Re6 Bd6=) 27...Kd5 28.Nf5 Ke5 (28...Kc6 29.Ke3 Bc5 30.Bc5 Kc5 31.Ng7+/– (31.Ke4?! Re8 32.Kf3 Ne5 33.Kf4 g6=)) 29.Nd6+– Be7?? (better is 29...Ke6 30.Ne4 Be7+–) 30.Re1 (better is 30.Nf7 Ke6 31.Nh8+–) 30...Rf8= 31.Kg1 Bd6 32.cd6 Kd6 33.Re4 Kd5 34.Rd4 Ke5 35.Rd7 Rf6 (better is 35...Nf4 36.h4 Ne6=) 36.Bd4+/– Ke6 37.Rg7 Ne5 38.Be5 Ke5 39.Re7 (39.Rg5 Rf5 40.Rf5 Kf5+/–) 39...Kd5 40.Rd7 Ke6 41.Rh7 Rf5 42.Rh6 Ke5 (42...Kf7 43.Rc6+/–) 43.h3 (better is 43.g3!?+–) 43...Kf4+/– 44.Kh2 Rg5 (44...Kg5 45.Rh8+/–) 45.Rf6 Ke5 46.Rf3 Ke4 47.h4 Rd5 48.Rg3 Rf5 49.Rg5 (better is 49.Kh3+/–) 49...Rf4?? (better is 49...Rg5 50.hg5 Kf5=) 50.Rh5+– Rf2 51.Kh3 Kf4 52.Rg5 Ke3 53.h5 Rf1 54.Rg3 Kf4 (54...Kd4+–) 55.Rg4 (55.Rf3 Rf3 56.gf3+–) 55...Kf5 (56.Kg3 Rd1+–) +–. kamera – Ammerillo, GameColony.com, 2002.

4.Bb2 d5 5.e3 Bd7 6.Nf3 c6 7.c4 cb5 8.cb5 e6 9.a4 Bb4 10.Nbd2 N8e7 11.Be2 0–0 12.0–0 Ba5 13.Qb3 b6 14.Rfc1 Nf5 15.Rc2 Nfh4 16.Rac1 Nf3 17.Nf3 (worse is 17.gf3 Qg5 18.Kh1 Qh4+=) 17...Nh4 18.g3 (18.Nh4 Qh4 19.Rc7 Rfd8+/–) 18...Nf5 (18...Nf3 19.Bf3 Rc8 20.e4+=) 19.Ne5 Bc8 (better is 19...f6!? 20.Nd7 Qd7+/–) 20.Nc6+– Qg5 21.Ba3 Re8 22.Na5 ba5 23.Rc7 e5? (23...Rd8 24.Qc2 Bd7 25.Bc5+–) 24.de5 (24.Qd5!? Be6 25.Qe5 Bb3+–) 24...Be6 25.Bb2?? (better is 25.Qd3+–) 25...d4+/– 26.Bc4 Bc4? (26...de3 27.fe3 Ne3 28.Be6 fe6 29.Bd4+/–) 27.R1c4 (better is 27.Qc4!? de3 28.Qf7 Kh8 29.f4+– (29.Ra7?! ef2 30.Kf1 Rab8=)) 27...de3+/– 28.fe3 Ng3 (28...Qe3!? 29.Qe3 Ne3+–) 29.hg3+– Qg3 30.Kf1 Qh3 31.Ke2 Rad8 (31...Qg2 32.Ke1 Qg1 33.Kd2 Qf2 34.Kc1 Qe1 35.Kc2+–) 32.Bd4 (32.Rf7 Qg2 33.Rf2 Rd2 34.Kd2 Qf2 35.Kd3 Qf1 36.Kc2 Qg2 37.Kb1 Kh8+–) 32...h6 33.Rc2 Qf5 (33...Rd7 34.Qd3+– (34.Ba7?? Qg2 35.Ke1 Qg1 36.Ke2 Qd1 37.Kf2 Rc7–+)) 34.Ra7 Qg4 35.Kd2?? (35.Kf1 Qh3 36.Ke1 Qh1 37.Kd2 Qf3+–) 35...Qg2?? (better is 35...Rd4 36.ed4 Qd4 37.Qd3 Qa7–/+) 36.Kc3 Rc8 37.Kb2 Qf3 (37...Rc2 38.Qc2 Qg4 39.Ka3+–) 38.Rc8 Rc8 39.e6 Qe2 (39...f6 40.Rc7! Re8 41.Qc2+–) 40.Ka3 Qe1 (40...Qf1 41.Rf7 Qc1 42.Bb2 Qc4 43.Qc4 Rc4 44.Rg7 Kf8+–) 41.ef7 Kf8 (41...Kh8 42.Bg7! Kh7 43.Qd3 Kg7 44.f8Q Kf8 45.Qf5 Ke8 46.Qc8) 42.Ra6 (42.Bg7 Kg7 43.f8Q Kg6 44.Qe6 Kh5 45.Qfh6) 42...Qb4 (42...Qc1 43.Bb2 Qc5 44.Ka2+–) 43.Qb4 ab4 44.Kb4 Kf7 45.Ra7 Kg6 46.Rg7 Kh5 (46...Kf5 47.Rf7 Kg6 48.Rf4+–) 47.Rd7 Kg5 48.Rd5 Kg4 49.Rc5 Rh8 (49...Rd8+–) 50.Bh8 1–0. Fournier,Frederic (2105) – FREDIMAN (1760), Active, 2004.

4.Bb2 d5 5.Nf3 Bf5 6.Nbd2 e6 7.e3 Nf6 8.Be2 Bd6 9.a4 c6 10.c4 0–0 11.c5 Bb8 12.0–0 Ne4 13.Nb3 White prepares a5 (13.Ne4 de4 14.Nd2 Qg5=) 13...f6 14.Bd3 Qe7 15.a5 e5 (15...cb5 16.Bb5 Qc7 17.a6=) 16.b6 (16.a6 ba6 17.bc6 Qc7+–) 16...ab6 17.ab6 Ra1 18.Ba1 Qe6 19.Re1 Bg4 20.Be2 f5 21.Nbd2 f4 (better 21...Nd2 22.Nd2 e4=) 22.Bf1?? (better 22.Ne4 de4 23.Ng5 fe3 24.fe3+– (24.Ne6?! ef2 25.Kf1 Be6+=)) 22...fe3 (22...Nd2 23.Qd2 Bf3 24.gf3–+) 23.fe3 (23.Re3 Nd2 24.Qd2 Bf3 25.Rf3 Rf3 26.gf3–+) 23...ed4?? (better 23...Nh4! 24.Be2 Ng2 25.Ne5 Bf5 (worse 25...Ne1 26.Bg4 Qf6 27.Qe1 Nd2 28.Bc3–+) 26.Ne4 Ne1–+ (26...Be4?! 27.Rf1–/+)) 24.ed4 (24.Ne4 Bf3 25.gf3 de4 26.ed4=) 24...Qf5 25.Bd3 Qh5 26.Qc2 (better 26.Be4 Bh2! 27.Kf2 Qh4 28.Ke3 Bf4 29.Kd3 de4 30.Ne4–/+) 26...Bf3 (better 26...Nd2 27.Bg6 Qh6 (worse 27...Qg6 28.Qg6 hg6 29.Nd2+=; 27...hg6?! 28.Qd2 Bf3 29.gf3–/+) 28.Bf7 Kf7 29.Qd2 Bh2 30.Kf2 Bf4–+) 27.Nf3= Bh2?? (better 27...Ng5 28.Ne5 Nf4=+) 28.Nh2+– Rf2 (28...Qh4 29.Rf1+–) 29.Re2 (29.Be4?! Rc2 30.Bc2 Nf4+–) 29...Re2 30.Qe2 (30.Be2 Qh4 31.Nf3 Qf2 32.Kh2 Nh4 33.Nh4 Qh4 34.Kg1 Qe1 35.Kh2 Qa1=+) 30...Nf4?? (30...Qf5+–) 31.Qh5 Nh5 32.Be4 (32.Be4 Nf6 33.Bf5+–) 1–0. alessandrocarvalhaes (1930) – Alexlevel3 (1940), lichess.org, 2019.

4.Bb2 Nf6 5.Nd2 d5 6.Ngf3 e6 7.e3 Bd6 8.c4 Bd7 (8...0–0 9.Bd3=) 9.c5+= Be7 10.Bd3 c6 11.a4 cb5 12.ab5 0–0 13.0–0 a6 14.b6 (14.ba6 ba6 15.Ra6 Ra6 16.Ba6 Qc7+–) 14...Bc6 15.Ba3 Ne4 16.Qb1 Nc3 17.Qc2 Ne2?? (better 17...Nb5+–) 18.Be2+– f6 19.Bd3 e5 (19...Qe8 20.Bb4+–) 20.Bg6 hg6 21.Qg6 ed4 (21...Be8 22.Qg3+–) 22.Nd4 Qd7 23.Qf5 (better 23.Nf5!? Bd8+–) 23...Qf5 24.Nf5 Bd8 (24...Kf7 25.Nb3 g6 26.Nfd4+–) 25.Nd4 Rf7 (25...f5 26.Nc6 bc6 27.Bb2+–) 26.N2f3 (26.Nc6 bc6 27.Nf3 f5+–) 26...f5 (26...Bd7 27.Rfd1+–) 27.Rfc1 (better 27.Nc6 bc6 28.Bb2 a5+–) 27...Bf6 28.Rab1 Bd4 29.ed4 f4 30.Ne5 Rf6 31.f3 Raf8 (31...Re8 32.Re1 Bb5 33.Bc1+–) 32.Re1 Rh6 33.Bc1 (33.Nc6 Rc6 34.Re5 Rd8+–) 33...Rf5 (33...Re6 34.Bd2 Bb5 35.Ng4+–) 34.Bd2 Rfh5 (34...Bb5 35.Ng4 Rhh5 36.Rb5 ab5 37.Re8 Rf8 38.Rf8 Kf8 39.c6+–) 35.h3 (better 35.Bf4 Re5 36.Re5 Rf6+–) 35...Rg5 (35...Rf5 36.Nc6 Rc6 37.Re8 Rf8 38.Rbe1+–) 36.Kh2 1–0. alessandrocarvalhaes (1870) – Merylooo (1800), lichess.org, 2019.

4.c4 b6 5.a4 (5.h4 h5=) 5...Bb7= 6.d5 (better 6.Nf3=) 6...Nf4?? (6...e6 7.e4=+) 7.g3?? (better 7.Bf4 e6 8.de6 de6 9.Nd2+–) 7...Nd5 (better 7...Ng6=) 8.cd5+– Bd5?? (better 8...e6 9.Bg2 Nf6+–) 9.Qd5 e6 10.Qd3 (10.Qb7 a5+–) 10...Nf6 (10...c5 11.e4+–) 11.e4 Bb4 (11...d5 12.e5 Ne4 13.Nf3+–) 12.Bd2 Bc5 13.Nf3 (13.Be2 d5 14.Nc3 Rc8+–) 13...e5 (13...Ng4 14.Qc3 0–0+–) 14.Ne5 0–0 (14...Qe7 15.Bc3+–) 15.f3 (15.Bc3 a6 16.Nd2 ab5 17.ab5 Ra1 18.Ba1 Qe7+–) 15...d5 (15...a6 16.ba6 Qe8 17.Bc3+–) 16.Nc6 Qe8 17.e5 Nd7 (17...a6 18.Kd1 ab5 19.ef6 Qc6 20.fg7 Kg7 21.ab5+–) 18.f4 Qe6 (18...d4 19.Bg2+–) 19.Nc3 d4 20.Ne4 (better 20.Nd4 Bd4 21.Qd4 c5+–) 20...Qd5 (20...a6 21.Ng5 Qh6 22.Qf5+–) 21.Ng5 (21.Nc5 Qh1 22.Nd7 Rfe8+–) 21...Qh1 (21...g6 22.Rg1 Nb8+–) 22.Qh7 1–0. afsharian – user123456789101112, lichess.org, 2018.

4.c4 e5 5.Nc3 (5.Nf3 ed4 6.Nd4 Nf6=) 5...c6 (5...Nf6 6.Nf3 e4 7.Ne5=) 6.Nf3 Bb4 7.Qb3 a5 (7...Bc3 8.Qc3 e4 9.Ne5=) 8.ba6 ba6?? (better is 8...Qa5 9.Bd2 ed4 10.ab7 Bb7 11.Nd4 Rb8+/–) 9.Qb4+– Qe7 (9...d5 10.cd5 cd5 11.Ne5 Ne5 12.de5+–) 10.Qe7 N8e7 11.de5 0–0 12.Ne4 d5 (12...Rb8 13.Ba3+–) 13.cd5 (better is 13.ed6 Nf5 14.g4 Nfh4 15.Nh4 Nh4+–) 13...cd5 14.Nd6 Bd7 (14...Nc6 15.Bb2+–) 15.Bg5 (15.Bb2 Rfb8 16.Bd4 Nc6+–) 15...h6 (15...Nc6 16.e3+–) 16.Be7 Ne7 17.e3 Nc8 (17...Rfb8 18.Bd3+–) 18.Rd1 Nb6 (18...Be6 19.Nb7+–) 19.Be2 Ba4 (19...Rfb8 20.a3+–) 20.Rb1 Nc8 21.Kd2 (21.Nd4!? Nd6 22.ed6 Rfd8+–) 21...f6 22.Rhc1 Ne7 (22...fe5 23.Nc8 Rac8 24.Rc8 Rc8 25.Ne5 Rc2 26.Ke1 Kf8 27.Ba6 Ra2+–) 23.Rc7 Nc6 (23...fe5 24.Re7 Rf6 25.Rb6+–) 24.Rbb7 Ne5 (24...Rfb8 25.Rg7 Kh8 26.Rb8 Rb8 27.ef6 Rf8+–) 25.Rg7 Kh8 26.Rh7 Kg8 27.Rbg7 1–0. marcosramos – verbali (2010), net–chess.com, 2007.

4.c4 Nf6 5.Bb2 (5.Nf3 d6=) 5...e6 6.a3 b6 (6...Be7 7.e3=) 7.e3 h6 (7...Bb7 8.Nf3=) 8.Nf3 Ne4 9.Bd3 Nd6 (9...Bb7 10.Qc2 f5 11.0–0+=) 10.0–0 (10.c5 Nf5+/–) 10...f5 (10...a6 11.Ne5 Nh4 12.g3+/–) 11.Nbd2 Be7 (11...a6 12.Ne5 Ne5 13.de5+/–) 12.d5 (12.Ne5 Ne5 13.de5 Nf7+/–) 12...ed5 (12...Bf6 13.Bf6 Qf6 14.de6 de6 15.Qc2+/–) 13.Bg7 Rh7 14.Bb2 Bf6 (14...Bb7!?+/–) 15.Bf6+– Qf6 16.cd5 Bb7 17.Qb3 (17.Rc1 Rc8 18.Qb3 Qf7+–) 17...0–0–0 (17...Qf7 18.Nc4+/–) 18.a4 Rg7 19.Rac1 Ne8 20.Qc2 Bd5 21.Bf5+– Ne7 22.Be4 Be4 23.Qe4 Qg6?? 24.Qa8 1–0. phildo (1730) – donsjostedt, net–chess.com, 2003.

4.c4 Nf6 5.Nc3 b6 (5...e5 6.Nf3 ed4 7.Qd4=) 6.e4 (6.Nf3 e6=) 6...Bb7 (6...e5 7.de5 Ne5 8.Nf3=) 7.e5+= Ng8 (7...Ne4 8.Ne4 Be4 9.f3+=) 8.f4 (8.Nf3 e6+=) 8...e6= 9.Nf3 (9.Rb1 Be7=) 9...Bb4 10.Bd2 Bc3 (10...Nf4 11.g3 Ng6 12.Bg2=+) 11.Bc3 Nf4 12.Bd2 Ng6 13.h4 (13.Be2 d6=) 13...h6 (13...Bf3!? 14.Qf3 Nh4=+) 14.h5 (14.Bd3 d6 15.h5 Nf8=) 14...N6e7 15.a4 (15.Bd3 Nf5=) 15...c6 (15...Nf5 16.Bd3=+) 16.c5 (16.Bf4 g5 17.hg6 Ng6=) 16...cb5 (16...Nf5 17.Bd3=) 17.Bb5 (17.ab5!? bc5 18.dc5=) 17...bc5=+ 18.dc5 Nc6 (18...Qc7 19.0–0=+) 19.Bc3 (19.0–0 Qc7=) 19...Nge7=+ 20.Bc6 (20.0–0 Nd5 21.Bd2 0–0=+) 20...Bc6–/+ 21.a5 (21.0–0 Nf5 22.Nd4 Qg5 23.Nc6 Qe3 24.Rf2 Qc3–/+) 21...a6 (21...Nf5 22.Rb1–/+) 22.0–0 0–0 23.Nd4 (23.Rf2 Nd5 24.Qd4 Rb8–/+) 23...Rb8 (23...Nd5 24.Bd2–/+) 24.Bd2 (24.Qg4 Qc7–/+) 24...Qc7 25.Qg4 (25.Rc1 Be4–/+) 25...Qe5 26.Bh6 (26.Rae1!? f5 27.Nf5 Qc5 28.Be3 ef5 29.Bc5 fg4 30.Re7 Rf1 31.Kf1–+) 26...Rb4 (26...Nf5 27.Nf5 ef5 28.Qf4 Qc5 29.Qe3 Qe3 30.Be3–+) 27.Rf4 Nd5 (better 27...Nf5 28.Bg7 Ng7–+ (28...Qg7?! 29.Nf5 Qg4 30.Rg4 Rg4 31.Nh6 Kh8 32.Ng4–/+)) 28.Nc6?? (28.Re4 Rd4! 29.Rd4–+ (29.Re5?? Rg4 30.Rg5 Rg5 31.Bg5 Rb8–+)) 28...Qe3 (better 28...Qa1 29.Kh2 dc6 30.Rb4 Nb4 31.Qb4 gh6 32.Qg4 Qg7–+) 29.Kh2 g6 (29...Qf4 30.Bf4 dc6+–) 30.hg6 (better 30.Nb4 Nf4 31.Qf4 Qf4 32.Bf4 gh5 33.Na6+–) 30...Rf4 31.gf7 (31.Bf4?! Nf4 32.Ra3 Qa3 (32...Qc5?? 33.gf7 Kf7 34.Qf4 Qf5 35.Qb4 Rh8 36.Kg1 dc6 37.Rf3+–) 33.gf7 Kh7=) 31...Kf7 32.Qh5 Kg8?? (32...Kf6 33.Qg5 Kf7 34.Rb1+– (34.Bf8?! Rf5 35.Qe3 Ne3+–)) 33.Qg5 (33.Qg6 Kh8 34.Qg7) 33...Kf7+– 34.Qf4?? (better 34.Rb1 Rg8 35.Ne5 Qe5 36.Qe5 Rh4 37.Kg1 Rh6 38.Qd6+–) 34...Qf4 (better 34...Nf4 35.Bf8 Ne2 36.Rf1 Ke8–+) 35.Bf4= Ke8? (35...dc6 36.Bd6 Rh8 37.Kg3=) 36.Bg5 (better 36.Nb8 Rf4 37.Na6+–) 36...Nc3?? (better 36...dc6 37.Kg3 Rf5=) 37.Ne5 (37.Nb4 Rf5 38.Be3 Nd5 39.Nd5 Rd5+–) 37...Ne2? (37...Rf5 38.Nf3 Rc5 39.Be3+–) 38.Ng6 (better 38.g4 Rf2 39.Kh3+–) 38...Kf7?? (better 38...Rg8 39.c6! dc6+–) 39.Nf8 Kf8 40.Rf1 Kg7 41.Bf6 Kg6 42.g4 (42.Be5 Kh5+–) 42...e5 (42...Nc1 43.Rc1 Kf6 44.Rf1 Kg5+–) 43.Be5 Kg5 44.Rf5 (44.Rf2 Kg4 45.Re2 Kf5+–) 44...Kg4 45.Rf7 Nc3 46.Rd7 (46.Bc3 Kg5 47.Rd7 Kf4 48.c6 Kg5 49.c7 Kg4 50.c8Q Kf3 51.Qf8 Ke2 52.Kg2 Ke3 53.Qf3) 46...Nb5 47.c6 Kf5 (47...Kf5 48.Rd5 Na3+–). afsharian – manucampo, lichess.org, 2018.

4.c4 Nf6 5.e3 c6 (5...e5 6.de5 Ne5 7.Nf3 Bb4 8.Bd2=) 6.a4 (6.Nf3 cb5 7.cb5 d5=) 6...a6 7.Nc3 e6 8.Nf3 d5 9.c5 (9.bc6 Bb4 10.Qb3 Qa5 11.cb7 Bb7+=) 9...cb5 (better 9...ab5!? 10.Bd3 b6 11.cb6 Qb6–/+) 10.ab5+= Bd7 (10...b6 11.Na4 bc5 12.Nc5+– (12.dc5?! ab5 13.Bb5 Bd7=)) 11.b6 (11.ba6!? Be7 12.Na4+–) 11...Ne4 12.Ne4 de4 13.Nd2 e5 (13...Bc6!?+=) 14.Ne4+– ed4 15.ed4 Be7 (15...Bc6 16.Qd3+–) 16.Bd3 (16.Bc4 0–0+–) 16...0–0 (better 16...Bc6!? 17.0–0 Qd4+=) 17.0–0+– Bf5 18.Re1 (18.Be3+–) 18...Be4? (18...Qd4 19.Be3 Qd5=) 19.Be4+– Bf6 20.Bb2 Nf4? (20...Rb8+–) 21.Bb7 Rb8 22.Ba6 Bh4 (22...Qd5 23.Bf1 Ne6+–) 23.g3 Qg5 (23...Ne6 24.gh4 Qh4 25.Qd3+–) 24.Re5 (better 24.Bc1 Nh3 25.Kg2 Qd5 26.Kh3 Bf6+–) 24...Qg6 Black gets the initiative 25.Bd3 (better 25.Qf3 Nh3 26.Kg2+–) 25...Nd3= 26.Qc2 (26.Re2=) 26...Nb2?? (better 26...Ne5!? 27.Qg6 Nf3 28.Kf1 fg6 29.gh4 Rf4–/+ (29...Nh4?! 30.Ra7=)) 27.Qb2 (27.Qg6 fg6 28.gh4 Nd3+–) 27...Rbd8 (better 27...Bf6 28.Ree1 Rfd8+=) 28.d5?? (better 28.c6 Qc6 29.gh4+–) 28...Bf6–/+ 29.f4?? (better 29.Rd1–/+) 29...Be5 30.fe5 (30.Qe5 Qd3 31.Rc1 Rd5–+) 30...Rd5 31.c6 (31.b7 Rb8 32.Qb4–+) 31...Qc6 32.Rb1 White intends b7 32...Rb8 33.b7 Qc5 34.Kg2 Re5 35.Rd1 h6 36.Qb1 (36.Kh1–+) 36...Qc6 (36...Re2 37.Kf3 Rf2 38.Kg4 Qg5 39.Kh3 Qh5) 37.Kh3 (37.Kg1 Re2 38.Rd8 Rd8 39.Qf1 Qb6 40.Kh1 Qb7 41.Kg1 Rd1 42.Qd1 Qg2) 37...Rb7 (37...Qe6 38.g4 Rh5 39.Kg3 Qe5 40.Kf3 Rh3 41.Kf2 Qh2 42.Ke1 Re8 43.Qe4 Re4 44.Kf1 Rf3) 38.Rd8–/+ Re8 Do you see the mate threat? 39.Re8 Qe8 Threatening mate: Qe6 40.Qb7 Qe6 41.g4? (better 41.Kg2–/+) 41...h5–+ The mate threat is Qxg4 42.Qb8 Kh7 43.Qb4 hg4 44.Qg4 Qg4 45.Kg4 Kh6 46.h4 f6 47.h5 g5 (better 47...f5 48.Kh4 f4–+) 48.Kf5?? (better 48.hg6 Kg6 49.Kf4=) 48...Kh5–+ 49.Kf6 g4 50.Kf5 Kh4 51.Kf4 g3 52.Kf3 Kh3 53.Ke2 g2 54.Kf2 Kh2 55.Ke1 g1Q 56.Ke2 (56.Kd2–+) 56...Kg3 (56...Qd4 57.Kf3 Kg1 58.Ke2 Kg2 59.Ke1 Kf3 60.Kf1 Qf2) 57.Kd2 (57.Kd3 Qc5 58.Kd2 Kf4 59.Kd3 Ke5 60.Kd2 Ke4 61.Ke2 Qc2 62.Ke1 Ke3 63.Kf1 Qf2) 0–1. SieStein – RudeRocker, lichess.org, 2019.

4.e3 a6 5.a4 ab5 6.Bb5 c6 7.Be2 b5 8.c4 ba4 (8...bc4 9.Bc4 e5 10.Qc2=) 9.Ra4+= Bb7 10.Ra8 Qa8 11.Nf3 c5 12.0–0 e6 13.Nc3 cd4 14.ed4 Be7 15.Nb5 Qc8 16.Bg5 (16.Bd3 Nf6+=) 16...f6 17.Bf6?? (better 17.Bd2+=) 17...Nf6–+ 18.Ng5 (18.Ne5 Ne5 19.de5 Ne4–+) 18...0–0 19.Bf3 (19.Qd2–+) 19...Bf3 20.Qf3 Qc4 21.Rb1 (21.Na3 Qd5 22.Qd5 Nd5 23.Nh7 Kh7–+) 21...Nd5 22.Qh3 (22.Qh5 Bg5 23.Qg5 Rb8–+) 22...Bg5 23.Nd6 (23.Qb3 Qe2 24.Qd1 Qf2 25.Kh1 Nh4–+) 23...Qc2 (23...Qd4!? 24.Rf1–+) 24.g3 (24.Rf1 Be3! 25.Qg3 Rf2 26.Qf2 Bf2 27.Rf2 Qd1 28.Rf1 Qd4 29.Kh1 Ne3 30.Rb1 Qd5 31.Rb8 Nf8 32.Rf8 Kf8 33.Kg1 Qg2) 24…Qb1 (24...Qb1 25.Qf1 Qc2–+) 0–1. SieStein – RudeRocker, lichess.org, 2019.

4.e3 Nf6 5.Bb2 d5 6.c4 e6 7.Nc3 Bb4 8.a3 Bc3 9.Bc3 0–0 10.Nf3 Ne4 11.Bb2 (11.Bb4 Re8+=) 11...f5 12.cd5 (12.Bd3 a6+=) 12...ed5= 13.Be2 f4 14.0–0 Bg4 15.Ne5 Ne5 16.de5 f3 (16...Be2 17.Qe2 f3 18.gf3 Qg5 19.Kh1=+) 17.gf3 (better 17.Bf3 Bf3 18.gf3+=) 17...Bf3?? (17...Bh3 18.f4 Bf1 19.Bf1 b6=) 18.Bf3+– Qg5 (18...a6 19.Bg2 ab5 20.Qb3+–) 19.Bg2 Rf5 (19...Rad8 20.Bd4 c6 21.Rc1+–) 20.Kh1 (better 20.Qd5 Kh8 21.Qb7+–) 20...Rf2?? (20...Nf2 21.Rf2 Rf2 22.Qd5 Kh8 23.Qb7 Re8+–) 21.Qd5 Kh8 Threatening mate: Qxg2 22.Qe4 Raf8 (22...Rb2 23.e6 Kg8+–) 23.Rf2 Rf2 24.e6 Qb5 (24...Qe7 25.Rd1 Rb2 26.Qd5+–) 25.e7 (25.e7 Qe8 26.Rd1 Rf1 27.Rf1 Qg8 28.Rf8 c6 29.Rg8 Kg8 30.e8Q) 1–0. aravind555 – the22centuryboy, lichess.org, 2018.

4.e3 Nf6 5.Nf3 d6 6.c4 (6.Bd3 e5 7.Bg6 hg6 8.de5 Ng4+=) 6...a6 7.Nc3 ab5 8.cb5 h5 (8...e5 9.Bd3=) 9.Bc4 (9.Bd3 d5+=) 9...Bg4 10.Qb3 (10.h3 Bf5+=) 10...e6= 11.Ng5 d5 12.Be2 (12.Bd3 Bd6=) 12...Be2=+ 13.Ne2 Bd6 14.Qc2 Ng4 (14...Rh6!?=+) 15.Ne6+= Qf6 16.N6f4 Nh4 (16...Nf4 17.ef4 Kd8+=) 17.Kf1 (17.0–0 Ng6 18.Nd5 Bh2 19.Kh1–/+) 17...g5=+ 18.Nd3 Nh2 19.Rh2 (better is 19.Kg1!? Ng4 20.Nc3=) 19...Bh2–/+ 20.Ne5 (20.Nc5 b6 21.Na6 Nf5–/+) 20...Be5–+ 21.de5 Qe7 (21...Qe5 22.Bb2 Qh2 23.Nf4–+ (23.Bh8?? Qg2 24.Ke1 Nf3 25.Kd1 Qf1)) 22.a4? (better is 22.Bb2–+) 22...Qe5 23.Bb2 (23.Qc3 Ng6–+) 23...Qh2 24.g3 (24.Ng3 Qg2 25.Ke2 Qf3 26.Kd3–+) 24...Qg2 25.Ke1 Nf3 26.Kd1 Qf1 0–1. Hermann,Hans Joachim – Aasum,Anker, corr SOK–90–55, 1991.

4.e4 b6 5.Nf3+= Bb7 (5...a6 6.c4+=) 6.Nc3 (6.Bd3 Nf6 7.e5 Ne4+/–) 6...Nf6 (6...e6 7.Rb1+=) 7.e5 Ng4 (7...Ne4 8.Ne4 Be4 9.Bc4+=) 8.h3+/– Nf2? (better is 8...Nh6+/–) 9.Kf2+– e6 10.Bd3 Nf4?? (10...a6+–) 11.Bf4 Qb8 (11...a6 12.a4+–) 12.Ne4 f5 (12...Ba3 13.Rb1+–) 13.ef6 Bb4 (13...Kd8 14.Ne5 gf6 15.Nf7 Ke7 16.Nh8+–) 14.fg7 Rg8 1–0. mrkt – NN, GameColony.com, 2002.

4.e4 d5 5.e5 a6 6.ba6 ba6 7.Nf3 e6 8.Bd3 Nh6 (8...c5 9.c3+=) 9.0–0 Bb4 (9...Nf5!?+=) 10.c4+/– 0–0 11.cd5 Qd5 12.Bh6 gh6 13.Nbd2 Bd2 14.Qd2 (14.Nd2?! Qd4 15.Nf3 Qg4=) 14...Bb7 15.Qh6 Kh8 (15...Qd7 16.Ng5 f5 17.Bc4+–) 16.Bc4 (better is 16.Rfc1 Rfc8 17.Rc5+–) 16...Qc4?? (better is 16...Qe4+–) 17.Ng5 Qd5 (17...Qf1 18.Rf1 Bg2 19.Qh7) 18.Qh7 1–0. Wall,Bill – Nagdeve,Ramakant, chess.com, 2011.

4.e4 d5 5.e5 Bd7 6.Nf3 e6 (6...Bg4 7.Be2+=) 7.Bd3 N8e7 (7...a6 8.ba6 ba6 9.0–0+=) 8.0–0 c6 9.Nc3 Nc8 (9...Nf5 10.Bg5 Qb6 11.bc6 Qc6 12.Ne2+=) 10.Ng5 Bb4 11.bc6 bc6 (11...Bc6 12.Qf3 Qe7 13.Ne2+=) 12.Qf3+/– 0–0 (better is 12...Qe7!? 13.Na4 c5+/–) 13.Qh5+– h6 14.Nf7! Rf7 (14...Rf7 15.Qg6 Remove defender; 14...Kf7 15.Qg6 Double attack (15.Qf3 Deflection; 15.Qf3 Decoy; 15.Qg6 Remove defender)) 15.Qg6 Be8 (15...Kf8 16.Ne2 Qa5 17.Qh7+–) 16.Qh7 Kf8 17.Ne2 Ke7 (17...Qa5 18.Bg6 Nb6 19.a3+–) 18.c3 g5 (18...Ba5 19.Bg6 Qc7 20.Bf7 Bf7 21.Qg7 Ke8+–) 19.Qh6 (19.cb4?! Rh7 20.Bh7 Bh5+/–) 19...Ba5 (19...Kd7 20.cb4 Qb6 21.Bg5+–) 20.Bg5 (20.Bg5 Kd7 21.Bd8 Bd8 22.Nf4+–) 1–0. marre – oppo, internet, 2010.

4.e4 d5 5.e5 Bf5. Taulien,Hans_Juergen (2225) – Hitman,Uwe (1800), remoteschach.de, 2004.

4.e4 e6 5.Nf3 d5!? 6.e5 Bb4 7.c3 Ba5+=.

4.e4 e6 5.Nf3 d6 6.Bd3 Be7 7.e5 (7.Nc3 Nf6+=) 7...d5 (7...de5!? 8.de5 Nh6+=) 8.0–0+– b6 (8...Nh6!?+–) 9.c4+– Bb7 (9...dc4 10.Be4 Bd7 11.Qa4+–) 10.cd5 (10.Nc3 Bb4 11.Qb3 Bc3 12.Qc3 dc4 13.Qc4 N8e7+=) 10...Bd5 (10...Qd5!? 11.Nc3 Qd7+–) 11.Nc3+– Bf3 12.Qf3 (12.gf3?! Qd4 13.Bg6 Qc3=+) 12...Nh4 (12...Rb8 13.Bg6 hg6 14.d5+–) 13.Qc6 Qd7 (13...Kf8+–) 14.Qa8 Bd8 (14...Qd8 15.Qc6 Qd7 16.Qe4+–) 15.Bg5 f6 (15...Ng6 16.Be4 h6+–) 16.Bh4 g5 17.ef6 (17.Bg3 Nh6 18.Bc4 0–0+–) 17...Nf6 (17...gh4 18.Rae1 Nf6 19.Bf5+–) 18.Bg5 Qg7 19.Bf6 Qf6 20.Qc6 Ke7 21.Rfe1 (21.Rfe1 Qf7 22.Re3+–) 1–0. DEFFM – GuestRTQN, freechess.org, 2019.

4.e4 e6 5.Nf3 Qe7 6.Bd3+– Qb4 (6...Nf6!?+–) 7.Bd2+– Qb2 (7...Qe7 8.Nc3+–) 8.Nc3 Bb4? (8...Qa3 9.0–0 Nf6+–) 9.Rb1 Qa3 10.Rb4 Qb4 11.Nd5 Qb2 (11...Qd6 12.Bb4 c5 13.Bc5+–) 12.Nc7 Kd8 13.Na8 Qa2 (13...b6 14.h4 f6 15.h5+–) 14.0–0 N6e7 (14...Nf6+–) 15.Ne5 Nh6 16.Bh6 Qb2 17.Nf7 Ke8 18.Nd6 Kd8 (18...Kf8 19.Qh5 Ng6 20.Qg5 Kg8 21.Qd8 Nf8 22.Qe7 gh6 23.Qf7) 19.Qh5 Qd4 (19...g6 20.Qc5 Qc3 21.Qc3 Nc6 22.Bg5 Ne7 23.Qc8) 20.Qe8! Re8 (20...Re8 21.Nf7 Mate attack) 21.Nf7 1–0. DEFFM – GuestFCWC, freechess.org, 2019.

4.e4 Nf6 5.e5+= Nd5 6.c4 Nb6 7.c5 Nd5 8.Bc4 e6 9.Nf3 f6 (9...d6 10.cd6 cd6 11.0–0+=) 10.ef6 Qf6 11.Bg5 Qf7 (11...Qf5 12.Bd3 Qf7 13.0–0+=) 12.Bd5+/– ed5 13.0–0 Be7 14.Be7 (14.Nc3 d6 15.Qb3 h6 16.Be7 Ne7+/–) 14...Ne7 15.Ne5 Qf6 16.Qh5 g6 17.Qf3 Qf3 18.Nf3 (< 18.gf3 d6 19.cd6 cd6=+) 18...0–0 19.Re1 Nf5 20.Nbd2 c6 21.g4 Nh6 22.h3 a6 23.ba6 Ra6 24.Re7 Rf7 (24...Nf7 25.a4+=) 25.Re5 Ra4 26.Kg2 (26.Ng5 Rf8 27.Nb3 Nf7 28.Nf7 Kf7+/–) 26...Rb4 (26...Rf8 27.Re7+/–) 27.Re8 (27.Ng5 Rf8 28.Ndf3 Ra4+/–) 27...Rf8 28.Re7 Rf7 (28...Nf7!?+/–) 29.Rae1+– Re7 30.Re6?? (better is 30.Re7 Kf8 31.Rh7+–) 30...de6 31.Nb3 b6 (better is 31...Ra4 32.Nc1–+) 32.Ne5 Rc7 33.Nd3 Rc4 (better is 33...bc5!? 34.Nb4 cb4 35.Nc5–+) 34.cb6 Rb7 35.Na5 Rd4 (better is 35...Rb6 36.Nc4 dc4 37.Ne1–+) 36.Nb7 Rd3 37.Nd6 Ba6 38.b7 Bb7 39.Nb7 Ra3 40.Nd8 e5 (better is 40...c5 41.Ne6 c4 42.Nd4–+) 41.Nc6 Nf7 42.Ne7 Kg7 43.Nd5 Ra2 44.Nc3 Rc2 45.Ne4 h5 (46.Kg3 Rc4–+) 0–1. b4_player (1890) – serbkiller (1810), GameColony.com, 2002.

4.e4 Nf6 5.e5 Nd5 6.c4 Nb6 7.Nf3 e6 8.c5 Nd5 9.Bc4 c6 10.Bd5 (10.0–0 b6+=) 10...cd5 11.0–0 Be7 12.a4 (12.Nc3 0–0+=) 12...0–0 (12...b6 13.Ba3+=) 13.a5+= f5 (13...a6 14.b6+=) 14.Nc3 h6 15.a6 b6 (15...ba6 16.ba6 Qc7 17.Nb5+–) 16.cb6 (16.Ba3 Re8+–) 16...Qb6+= 17.Qb3 Nh4? (better 17...Rb8!?+=) 18.Nd5!+– Nf3? (18...ed5 19.Qd5 Double attack) 19.Qf3 ed5 20.Qd5 (20.Qd5 Kh7 21.Qa8 Ba6 22.Qf3 (22.Ra6?! Ra8 23.Rb6 ab6+–) 22...Bb5 23.Rd1+–) 1–0. DEFFM – GuestXMDD, freechess.org, 2019.

4.e4 Nf6 5.e5 Nd5 6.c4 Ndf4 +=.

4.e4 Nf6 5.e5 Nd5 6.Nf3 e6 7.c4+= Bb4 8.Bd2 Bd2 9.Nbd2 Nde7 10.h4 h5 11.g3 d6 12.ed6 Qd6 13.Bd3 0–0 14.0–0 Rd8 15.Re1 c6 16.bc6 Qc6 17.Rb1 Nf5 18.Bf5 ef5 19.d5 Qa6 20.Qb3 f4 21.Nd4 fg3 22.fg3 Qd6 23.Ne4 Qe7 24.c5 Qe5 25.Nf3 Qf5 26.Rbd1 Qg4 27.Nfg5 Rf8 28.Nf2 Qf5+/– 29.d6 a5 White is in command 30.d7! a4 31.Qb5 Bd7 32.Rd7 b6 33.Qd3 Qd3 34.Nd3 bc5 35.Nc5 a3 36.Re3 Rfc8 37.Rc3 Ne5 38.Re7 Rab8 39.Re5 f6 40.Rf5 fg5 41.Ra3 Rb1 42.Kg2 Rb2 43.Kf3 gh4 44.gh4 g6 45.Rg5 Rb5 46.Ne6 Rg5 47.Ng5 Kg7 48.Ra7 Kf6 49.Kf4 Rc4 50.Ne4 Ke6 51.Ra6 Kf7 52.Ke5 Rc2 53.a4 Kg7 54.Ra7 Kh6 55.Kf6 Rc6 56.Kf7 Rc4 57.Ra8 Rc7 58.Kf6 Rc6 59.Ke5 Rb6 60.a5 Rb5 61.Ke6 Kg7 62.Nf6 g5 63.Rg8 Kh6 64.a6 Rc5 65.a7 Rc6 66.Kd5 Rf6 67.a8Q gh4 68.Ke5 (68...h3 69.Kf6 h2 70.Rh8) 1–0. Double Wood – mikekelly666, ChessWorld.net, 2005.

4.Nf3 a6 5.e3 ab5 6.Bb5 c6 7.Bd3 d5 8.0–0 Bg4 (8...Nf6 9.Nbd2=) 9.c4 Bf3 10.Qf3 e6 11.cd5 ed5 12.e4 (better 12.Nc3 Nf6 13.Rb1+=) 12...N8e7? (better 12...de4 13.Be4 Nf6=) 13.Re1+– de4 14.Re4 Qd5 (14...Qd6 15.Bc4 Qf6 16.Qh3+–) 15.Nc3 Qa5 16.Bc4 (16.Bd2 f5 17.Re2 0–0–0+–) 16...f6? (better 16...f5 17.Re2 0–0–0 18.Be6 Kb8+–) 17.Be6 Qc3 (17...Kd8+–) 18.Qc3 1–0. GuestLTSH – GuestNRKC, freechess.org, 2019.

4.Nf3 c6 5.a4 d5 6.e3 Bg4 7.Be2 Bf3 8.Bf3 e5 9.c3 e4 10.Be2 f5 11.Nd2 Qg5 12.g3 Bd6 13.Ba3 Bc7 14.c4 h5 (14...N8e7 15.bc6 bc6 16.Rc1+=) 15.Qb3 (15.h4 Qf6+–) 15...h4 (better 15...Qd8+–) 16.0–0–0?? (better 16.bc6 hg3 17.cb7 gf2 18.Kf2+–) 16...N8e7= 17.Be7 Ne7 (worse 17...Ke7 18.bc6 bc6 19.cd5+=) 18.c5 b6 19.f4 Qf6 20.g4 h3 (20...g5 21.fg5 Qg5 22.h3–/+) 21.g5 (21.Rdg1 bc5 22.dc5 Rd8=+) 21...Qe6 22.Nf1 (22.Rdg1 bc5 23.dc5 Rb8=+) 22...bc5 23.bc6? (better 23.dc5 0–0 24.Rd4=+) 23...Qc6?? (better 23...Rb8 24.Qa2 c4–+ (24...Qc6?! 25.Bb5 Rb5 26.ab5 Qb5 27.Qa7 Qc4 28.Kd2 cd4 29.Ke1–+; 24...Nc6?! 25.dc5 Nb4 26.Qa3–+)) 24.Bb5+– Rb8 25.Qc2 (better 25.Bc6 Nc6 26.Qd5+–) 25...Rb5= 26.ab5 Qb5 27.Qc5 Qa4?? (better 27...Qb8 28.Kc2 Bd6=) 28.Qc7+– 0–0 (28...Kf7 29.g6! Ke6 30.Kd2+–) 29.Kd2 (better 29.Qe7 Qa2 30.Qc7 Rf7 31.Qc8 Rf8+–) 29...Qb4 30.Ke2 Rc8 31.Qd7 Rc2 32.Nd2 (better 32.Rd2 Qc4 33.Kf2+–) 32...Qc3 33.Qe7 Qd3 34.Kf2 Rd2 35.Rd2?? (35.Kg3 Rd1 36.Qe6 Kf8 37.Kh4+–) 35...Qd2= 36.Kg3?? (better 36.Kf1 Qd1 37.Kf2 Qf3 38.Ke1 Qh1 39.Kd2 Qh2 40.Kc3=) 36...Qe3 (36...Qg2 37.Kh4 Qg4) 37.Kh4+– Qf4 (37...Kh7 38.Rf1 Qd4+–) 38.Kh5 Qg4 (38...Qd6 39.Qd6 Kf7 40.Qd7 Kf8 41.g6 f4 42.Qd8) 39.Kg6 Qh5 40.Kh5 g6 (40...f4 41.Qe8 Kh7 42.g6) 41.Kg6 (41.Kg6 f4 42.Qg7) 1–0. alessandrocarvalhaes (1885) – Megdaz_Knight (1995), lichess.org, 2019.

4.Nf3 d5 5.c4 Nf6 6.cd5 Bg4 7.Nbd2 Qd5 8.Qa4 e5 9.e4 Qd6 (9...Ne4? 10.Bc4 Qd7 11.Ne4 Bf3 12.gf3+–) 10.Bb2 Qb4 11.Qc2 Bf3 12.gf3 ed4 13.a3 Qc5 (13...Qd6 14.Qa4=) 14.Qc5+= Bc5 15.Nb3 Bd6 16.Bd4 (16.0–0–0 0–0+=) 16...Be5 17.Rc1 (17.0–0–0!?=) 17...Bd4=+ 18.Nd4 0–0–0 19.Nf5 Ne5 20.f4 (20.Be2 g6 21.Ne3 Nd3 22.Bd3 Rd3=+) 20...Nd3 21.Bd3 Rd3 22.e5 Nh5 (22...Nd5!?=+) 23.Rc4= Ra3 24.Ke2=. Marekt – Pcmvr, ChessWorld.net, 2003.

4.Nf3 d5 5.e3 Nf6 6.Bd3 Bg4 7.0–0 e6 8.c4 Ne4 (8...dc4 9.Bc4 Bd6 10.Nbd2=) 9.cd5 (9.h3 Bf3 10.Qf3 Ng5+=) 9...Qd5 10.h3 Bf3 (10...Bf5 11.Ne1 h5 12.Be4 Qe4 13.Nc3+–) 11.Qf3+= (worse 11.gf3 Ng5 12.Be2 Bd6–/+) 11...f5 (11...Nf6 12.Nd2+=) 12.Be4 (12.Nd2 Nd2 13.Qd5 ed5 14.Bd2 Ne7+–) 12...fe4+= 13.Qg4 0–0–0 (13...Qf5 14.Nc3+=) 14.Nc3+– Qc4 (14...Qf5 15.Qe4 Bb4 16.Bb2+–) 15.Ne4 Qb5 16.Qe6 Kb8 17.a4 (17.Qb3 Qd5 18.f3 c6+–) 17...Qb4 (17...Qd3 18.Bb2+–) 18.Bd2 (18.Ba3 Qb6 19.Qb6 ab6 20.Bf8 Rhf8+–) 18...Qd6?? (better 18...Qe7 19.Qg4 Qd7+–) 19.Nd6+– (19.Nd6 Bd6 20.Rab1+–) 1–0. DEFFM – GuestQVXQ, freechess.org, 2017.

4.Nf3 d6 5.e4 c5 (5...Nf6 6.Bd3+=) 6.bc6 (6.dc5 Nf6+=) 6...bc6 7.Nc3 (7...Rb8 8.Bd3+=; 7.Bd3 Nf6+=). pcmvr – lachezar, internet, 2005.

4.Nf3 e6 5.c3 d5 6.Bg5 f6 7.Be3 Bd7 8.h4 Bb5 9.h5 N6e7 10.Na3 Bc6 11.Qb3 a6 12.Bf4 Nf5 13.e4? (13.g4 Nd6–/+) 13...Nd6 (better is 13...de4 14.Nh4 Bd5–+) 14.e5= Ne4 15.ef6 Qf6 16.Bc7 Nh6 17.Bd3? (17.Be5 Qe7 18.Nc2 Ng4=) 17...Ng5?? (better is 17...Qe7 18.Be5 Ng4 (18...Qa3?! 19.Qa3 Ba3 20.Bg7–/+) 19.Be4 A) 19...Ne5 A1) 20.de5? de4 (20...Qa3?! 21.Bd3=) 21.Nd4 Qa3–+; A2) 20.Ne5 Qa3 21.Bf3+/–; B) 19...de4–+) 18.Ne5 Ng4?? (better is 18...Rc8 19.Bb6 Bd6+=) 19.Ng4+– Qf4 (19...Nf3 20.Ke2 Qe7+–) 20.Bf4 Be7 21.Ne5 0–0 22.Nc6 (22.Bg5!? Bg5 23.Qc2 Rf6+–) 22...Rf4 23.Ne7 (23.Ne7 Kh8 24.Qb7+–) 1–0. burbank – zahn, Live Game Caissa's Web, 2004.

4.Nf3 Nf6 5.e3 d5 6.Bd3 Bg4 7.Nbd2 e5 8.Bg6 hg6 9.de5 Ne4 10.Bb2 Bb4 11.c3 Be7 (11...Nc3? 12.Qb3 Na2 13.Ra2 Bf3 14.gf3 Bd2 15.Kd2+–) 12.Qa4 Nd2 13.Nd2 Qd7 14.Ba3 (14.c4!? dc4 15.Qc4=) 14...Ba3+= 15.Qa3 Qb5 16.f3 Bf5 17.Nb3 Qc4 18.Nd4 Bd3 19.Kf2 (19.Qb3 0–0–0+=) 19...c5 20.Nb3 b6 21.Rac1 Kf8 22.f4 g5 23.Nd2 Qb5 24.fg5 Qd7 25.Nf3 Kg8 26.h4 Qg4 27.Rcd1 Be4 28.Qa6 Rh5 29.Rd2 Qf5 30.Rh3 c4 (30...Qe6 31.Qb7 Re8 32.Qa7=) 31.a4 Qd7 32.a5 ba5 33.Qa5 Attacks the backward pawn on d5 33...Rb8 34.Qc5 Rb6 35.Rh1 Qf5 36.Qe7 Kh7 37.Qa7 Rb3 38.Qd4 Qg4 39.Ra2 Rb7 40.Rh3 Qc8 ½–½. Fournier,Frederic – Frenzel,Lothar, corr B4/07/33, 2007.

4.e3 e5

5.Bb2 ed4 6.Qd4 (6.Bd4 d5=) 6...Nf6 7.Nd2 (7.Nf3 d6=) 7...d5 8.Ngf3 (8.Bd3 Bd6=) 8...Be7 (8...Bd6 9.Bd3=) 9.Be2 0–0 10.0–0 Ne8 (10...a6 11.ba6 ba6 12.Rab1=) 11.Qa4 (11.Qd3 Nf6+=) 11...Be6 12.Nd4 Bd7 (12...Bd6 13.Rfd1=) 13.Qb3 (13.c4 dc4 14.Bf3 c6 15.bc6 Bc6 16.Nc6 Qd2 17.Ne7 Ne7+–) 13...c5 14.bc6 bc6 15.c4 Rb8 16.Qc2 Bf6 (16...c5 17.N4f3 Nf6 18.cd5 Nd5 19.Rab1=) 17.N2b3 Qb6 (17...dc4 18.Bc4 Nd6 19.Bd3+=) 18.Ba3+/– White prepares c5 18...Be7 19.c5 (19.Be7!? Ne7 20.Rab1+/–) 19...Qc7= 20.Bd3 (20.Bb2 Bf6=) 20...Nf6 21.Nf3 (21.Bb2 Ne5=) 21...Rfe8 (21...Bg4 22.Nbd4+=) 22.Bb2= Qd8 (22...Ne4 23.Rab1=) 23.Rab1+= Be6 24.Ng5 (24.Nfd4 Qd7 25.Ne6 Qe6 26.Bf5+–) 24...Ng4? (24...Bg4 25.h3 Bc8 26.Rfd1+=) 25.Nf3?? (better is 25.Ne6!? fe6 26.Bg6 hg6 27.Qg6+–) 25...Qc8 (25...Nf6 26.Nfd4 Qd7 27.Ne6 fe6 28.Bg6 hg6 29.Be5+/–) 26.Nbd4+= Bd7 (26...Bf6 27.Ne6 Qe6 28.Bf5 Ne3 29.fe3 Qe3 30.Kh1 Rb2 31.Rb2 Bb2 32.Qb2 Qc5 33.Rc1+/–) 27.Nf5 Bf6? (better is 27...Bf8+=) 28.Nd6+– (28.Nd6 Qc7 29.Ne8 Re8 30.h3+–) 1–0. Ziese,Gerhard – Larsson,S, corr 3GMM–22, 1995.

5.Bb2 e4 6.c4 Nf6 7.Qc2 d5 (7...Bb4 8.Bc3 Qe7 9.h4=) 8.cd5 Bb4 (8...Qd5 9.Qc7 Bd6 10.Qc2=) 9.Bc3= Be7 10.Bd2 Bf5 (10...Nd5 11.Qe4 f5 12.Qc2+=) 11.Nc3 Bb4 (11...Nd5 12.Ne4 0–0 13.Nf3+=) 12.Nge2+= 0–0 13.Ng3 Pawn e4, live or die! (13.Qb3 Bc3 14.Nc3 Nh4+=) 13...Bc3= 14.Bc3 Nh4 15.Nf5 Nf5 16.Bc4 Nd5 (16...Qd7 17.Rc1=) 17.Qe4+= Nfe3 18.fe3 Nc3 19.Qd3 Nd5 20.0–0 Qg5 Attacks the backward pawn on e3 (20...Qd6 21.Rad1+–) 21.Rf3 Rae8 22.Raf1 (better 22.h4!? Qd8 23.Raf1+–) 22...Re3+= 23.Qd2 Qh6 24.Rf7 Rf7 25.Bd5 Ref3 26.Bf7 Rf7 27.Qh6 gh6 28.Rf3 Rd7 29.Rc3 Kf7 30.Kf2 Ke6 31.Ke3 Rg7 32.Rc2 Kd6 33.Kd3 (33.Rf2 c6=) 33...Rg5 34.Kc4 Rh5 (34...Rf5 35.Re2=) 35.g3 Rf5 36.Re2 Rf1 (36...a6 37.ba6 ba6 38.a4=) 37.Re5 Rc1 38.Kd3 Rd1 39.Kc3 Rc1 40.Kb2 Rf1 41.Rh5 Rf6 42.Kc3 Kd7 (42...c6 43.bc6 Kc6 44.a4=) 43.g4 a6 (43...c6 44.Rf5 Rg6 45.Rf7 Kc8 46.bc6 Rc6 47.Kb3+=) 44.a4+= ab5 45.ab5 c6 (45...Rg6 46.h3+=) 46.b6 (46.Rf5 Rg6+=) 46...Rg6 47.h3 Ke6 48.Kc4 Ke7 49.Rf5 Rg5 50.Kd3 Rg6 51.Ra5 Kd6 52.Rh5 ½–½. Mehlhorn,Uwe (2440) – Brueske,Thomas (2355), RSS5D pro–17, 2004.

5.Bb2 e4 6.d5 =.

5.de5 Ne5 6.Bb2 Bb4 7.c3 Bc5 =.

5.de5 Ne5 6.Bb2 Bb4 7.Bc3 =.

4.e4 e5

5.Bb2 Qe7 6.de5 Qb4 7.Bc3 Qe4 8.Qe2=.

5.Bc4 c6 (5...Nf6 6.Nf3 Ne4 7.de5+=) 6.bc6 (6.Ne2 d5 7.ed5 cd5=) 6...dc6= 7.Nf3 ed4 8.Nd4 (8.c3!?=) 8...Bc5+= 9.Be3 (9.c3 Nf6 10.0–0 0–0+=) 9...Ne5 (9...Nf6 10.0–0 Ng4 11.Nf5 Ne3 12.Qd8 Kd8 13.Ne3–/+) 10.Be2 Nf6 11.f3 0–0 (11...Qb6 12.Nc3+=) 12.0–0 Qe7 (12...Qc7 13.Qd2+=) 13.Nd2 (13.Qe1 Nh5+=) 13...Nd5 14.Bf2 (14.ed5 Ng4 15.fg4 Qe3 16.Kh1 Bd4+=) 14...Nc3 (14...Nf4!? 15.N2b3 Bd4 16.Bd4 Rd8–/+) 15.Qe1 Rd8 16.N2b3 Bb4 17.a3 Ne2 18.Qe2 Ba3 19.c3 (19.Nf5 Bf5 20.ef5 Nd7 21.Qe7 Be7+=) 19...Bd6 (19...a5 20.f4 Ng4 21.f5 Nf2 22.Qf2–+) 20.Bg3 (20.f4 Ng4 21.e5 Nf2 22.Qf2 Bc7–/+) 20...a6 (20...c5 21.Nb5 Bb8 22.Be5 Qe5 23.f4–/+) 21.Rfd1 (21.Rfe1 Bc7–/+) 21...Bc7 22.Nd2 (22.Qe1 a5–+) 22...b5–+ 23.Nf1 Bd7 (23...Qc5 24.Ne3 Bb6 25.Kh1–+) 24.Ne3 a5 25.Qc2 (25.c4 b4 26.Qc2 Bb6–/+) 25...Bb6 26.Kh1 Qf6 (26...Qc5 27.Qb2–+) 27.Ndf5 (27.f4 Ng4 28.Nf1 Qe7–+) 27...Bf5 28.Nf5 Nc4 29.Bh4 Rd1 30.Rd1 Qe6 31.Qc1 (31.Bf2 Bc7–+) 31...h6 32.Qf4 (32.Nd4 Bd4 33.cd4 a4–+) 32...Kh7 33.Bg3 (33.Qc1 a4–+) 33...a4 34.h4 (34.Qc1 a3–+) 34...a3 35.Ra1 (35.Qc1 a2 36.Qa1 Ra3–+) 35...a2 36.h5 (36.Qc1 Qd7 37.Bf4 Qd8–+) 36...Ra4 (36...Na5 37.Qg4 g5 38.Nh6 Kh6 39.Qe6 fe6 40.Ra2–+) 37.Bh4 (37.Be1 Qf6 38.g4 b4–+) 37...Qe5 38.Qc1 Ba5 39.Be1 Nd6 40.Ng3 (40.Nd6 Qh5 (worse is 40...Qd6 41.Qc2 Qc5 42.e5 Kg8 43.Qf5 Bc3 44.Qc8 Qf8 45.Qf8 Kf8 46.Bc3–+) 41.Kg1 Qc5 42.Kh1 Qd6–+) 40...Bb6 41.Qc2 (41.Kh2 f5 42.f4 Qe7–+) 41...Qc5 (41...f5!? 42.Bf2 Bf2 43.Qf2 fe4 44.Kg1–+) 42.Kh2 Nc4 43.Qe2 (43.Kh3 Qe5 44.Bf2–+) 43...Qg1 44.Kh3 Bc7 45.Qd3 (45.Qc2–+) 45...Ne3 46.Qe2 Bg3 47.Kg3 f5 (47...f5 48.Ra2 Ra2 49.Qa2 Qe1 50.Kf4 fe4 51.fe4 Nc4–+; 47...g5 48.hg6 Kg6 49.Bd2 Qa1 50.Qe3–+) 0–1. Wall,Bill – Frenzel,Lothar, corr, 2006.

5.Nf3 ed4 6.Qd4+= Be7 7.Nc3 (7.Qg7?? Bf6 8.Bb2 Bg7 9.Bg7 f5–+) 7...Bf6 8.Qd3 N8e7 9.Be3 (9.Rb1 d5=) 9...0–0= 10.Be2 (10.h4 d5 11.Rd1 Qd6=) 10...a6 11.b6 (11.Rb1 ab5 12.Rb5 d6=) 11...cb6=+ 12.Rd1 (12.Rb1 b5=+) 12...b5 13.0–0 Qc7 14.Nd5 (14.Bd4 Bd4 15.Nd4 d6–/+) 14...Nd5–/+ 15.Qd5 Qc2 (15...Re8 16.c4 b4 17.g3=+) 16.Nd4=+ Bd4 (16...Qc7 17.Rc1 Qe5 18.Qe5 Ne5 19.f4=+) 17.Rd2 Qc6 (17...Qc5 18.Rd4 (worse 18.Bd4 Qd5 19.ed5 d6–/+) 18...Qd5 19.Rd5=+) 18.Qd4= (worse 18.Bd4 Qd5 19.ed5 d6–/+) 18...Re8 19.f3 Qe6 (19...Ne5 20.Rfd1=) 20.Re1=. PassedPawn – Pcmvr, ChessWorld.net, 2003.

5.Nf3 Nf6 6.de5 Ne4 7.Bc4 Nc5 (7...Bb4 8.c3 d5 9.ed6 Bd6 10.Bf7 Kf7 11.Qd5 Kf6 12.Ng5+=) 8.h4 d6 9.h5 Ne5 10.Ne5 Qe7 11.Bf7 Kd8 12.0–0 Qe5 13.Re1 Qf5 14.Nc3 (14.Bd5 Be7 15.a4 Bf6=) 14...Bd7 (14...Qf7!? 15.Bg5 Kd7 16.Qg4 Ne6+=) 15.Bd5 Be7 16.Bf3 Re8 17.Nd5 Bf6 (17...Bb5? 18.Bg4 (18.Ne7?! Re7 19.Re7 Ke7=; 18.Re7?! Re7 19.g4 Qe5+–) 18...Qf7 19.Re7 Re7 20.Bg5+–) 18.Re8 Be8 19.Nf6 Qf6 20.Be3 (20.Be3 Qe5 21.a4+/–) 1–0. michal999 (2030) – kamerrraad (2015), gameknot.com, 2013.

5.Nf3 Nf6 6.de5 Ne4 7.Bc4 d5 8.Qd5+= Bb4 9.Nbd2 Qd5 10.Bd5 Nc3 11.Bc4 Bd7 12.a3 Be7 13.a4 (13.Bb2 Na4 (13...Nb5?? 14.a4+–) 14.Bd4 Nb6+=) 13...c6+= 14.h4 Na4 15.h5 cb5 16.e6 fe6 17.hg6 bc4 18.Ne5 Nb6 (18...b5 19.gh7 Bf6 20.Ng6 Rh7 21.Rh7=) 19.gh7+= Bf6 20.Ra5 Bc6 (20...Be5 21.Re5 Bc6 22.Rg5+=) 21.Ng6+– Kf7 (21...Bg2? 22.Rh2 Rh7 23.Rh7+– (23.Rg2? Rh1 24.Nf1 Bc3 25.Bd2 Bd2 26.Kd2 Rf1–+)) 22.Nh8 Rh8 23.f3 Kg6 (23...a6 24.Rah5+–) 24.Rah5 a5 25.Ne4 Be4 26.fe4 e5 27.R5h3 Nd7 28.Ba3 (28.Rg3 Kf7+–) 28...b5 (28...Bg5 29.Ke2+–) 29.Bd6 b4 (29...Bg5!?+–) 30.Ke2+– Kf7 31.Rc1 (31.Rd1 Ke6+–) 31...Kg6 (better 31...Ke6!? 32.Rd1 Bg5+–) 32.Ra1 Bd8 33.Rd1 Nf6 (33...Bg5 34.Rd5 b3 35.cb3 cb3 36.Rb3 Kh7 37.Rh3 Bh6 38.Be5 Ne5 39.Re5+–) 34.Be5 Nh7 (34...Be7 35.Bf6 Kf6 36.Rd4+–) 35.Rg3 (35.Rg3 Bg5 36.Bf4+–) 1–0. Jan_Ek (2125) – Mattudi (2075), internet, 2020.

3.e3 a6

4.ba6 Ra6 (better is 4...b6=) 5.Ba6+/– ba6 6.Bb2 (better is 6.Nf3 Nf3 7.Qf3+–) 6...Nf6?? (better is 6...Bb7 7.f3 Nc4+/–) 7.Be5+– d6 8.Bb2 (8.Bf6 ef6 9.Nf3 d5+–) 8...c5 (8...e5 9.Ne2+–) 9.Nf3 e5 10.d3 Be7 11.Nbd2 0–0 12.0–0 Bf5 13.d4 (13.Rb1 Qd7+–) 13...cd4 14.ed4 ed4 (14...e4 15.Ne1+–) 15.Nd4 Bg6 (15...Bg4 16.N2f3+–) 16.Nc6 Qd7 17.Ne7 Qe7 18.Re1 Qd7 (18...Qd8 19.Nc4+–) 19.Bf6 gf6 20.Re3 Re8 21.Re8 Qe8 22.Qe1 Qe1 23.Re1 Bc2 24.Nb3 (24.Nc4 d5 25.Ne3 Bd3+–) 24...Bb3 25.ab3 d5 (25...Kf8 26.b4+–) 26.Rd1 Kf8 27.Rd5 Ke7 28.Ra5 f5 29.Ra6 f6 30.Rc6 h5 (30...f4 31.Rc7 Kd6 32.Rh7+–) 31.b4 Kd7 (31...h4 32.b5 Kd7+–) 32.Rc1 f4 33.b5 f5 34.b6 h4 35.b7 h3 36.b8Q hg2 37.Kg2 (37.Rd1 Ke6 38.Rd6 Ke5 39.Qb4 f3 40.Qd4) 37...f3+– 38.Kf3 f4 (38...Ke7 39.Rc6 Kf7 40.Qb7 Ke8 41.Rc8) 39.Qc7 Ke6 (39...Ke8 40.Rd1 Kf8 41.Rd8) 40.Re1 (40.Rc6 Kd5 41.Qd6) 40...Kf6 (40...Kf5 41.Qf7 Kg5 42.Re5 Kh6 43.Rh5) 41.Qe5 (41.Qd6 Kg5 42.Re5 Kh4 43.Qh6) 41...Kg6 (41...Kf7 42.Qf5 Kg7 43.Re7 Kh6 44.Rh7) 42.Qf4 (42.Rg1 Kf7 43.Rg7 Kf8 44.Qe7) 42...Kh5 43.Re8 (43.Re5 Kg6 44.Rg5 Kh7 45.Qh4) 43...Kg6 44.Rg8 Kh7 45.Rg1 Kh8 46.Qh4 1–0. Fournier,Frederic – meninao, Active, 2005.

4.Bb2 Ng6 5.a4 ab5 6.ab5 Ra1 7.Ba1 b6 8.Nf3 Bb7 9.Be2 d6 10.0–0+= e5 11.d4 e4 12.Nfd2 d5 13.c4 Nf6 14.cd5 Qd5 15.Bc4 Qg5 (15...Qd7!?+=) 16.Qb3+– Bd5 (16...Nh4 17.Bf7 Kd8 18.g3+–) 17.Nc3 Bc4 18.Qc4 (worse 18.Nc4 Nh4 19.g3 Nf3 20.Kg2 Qh5=) 18...Bd6 (18...Nh4 19.g3 Kd8 20.Rc1 (20.Nde4?! Ne4 21.Ne4 Nf3 22.Kg2 Nh4 23.Kh1 Qf5+–; 20.Nce4?! Ne4 21.Ne4 Nf3 22.Kg2 Nh4 23.Kh1 Qf5+–) 20...Nf3 21.Nf3 ef3 22.Ne4 (22.Qf7?! Bd6+–) 22...Ne4 23.Qc7 Ke8 24.Qc6 Ke7 25.Qb7 Kf6 26.Qe4 Qg4 27.Qg4 Bd6 28.d5 Ke7 29.Qg7 Ra8 30.Qf6 Ke8 31.Qh8 Bf8 32.Qe5 Kd7 33.Qc7 Ke8 34.Qc6 Kd8 35.Bf6 Be7 36.Qd6 Ke8 37.Qe7) 19.Nde4 Ne4 20.Qc6 White prepares the advance d5 20...Kd8 21.Ne4 Qe7 22.Qa8 (22.Bb2 Qd7 23.Nd6 Qd6+–) 22...Kd7 23.Qc6 Ke6?? (23...Kd8 24.Bb2 Qd7 25.Nd6 Qd6+–) 24.d5+– Kf5 25.f3 Ne5 (25...Nf8 26.Qc2 Qd7 27.Nc5 Kg5 28.Nd7+–) 26.g4 Kg6 27.Qc2 Kh6 (27...Nd3 28.Qd3 Bh2 29.Kh2 f5 30.gf5 Kf7+–) 28.g5 (28.Nd6?! cd6 29.Qg2 Qh4 30.g5 Kh5+–) 28...Kh5 29.Ng3 Kg5 (29...Kh4 30.Qe4 Kh3 31.Qf5 Kh4 32.Qf4 Kh3 33.Ne4 Qg5 34.Ng5) 30.Qf5 (30.Qf5 Kh6 31.Qh5) 1–0. DEFFM – Runcastle, freechess.org, 2018.

4.d4 Ng6 5.Nf3 Nf6 6.Bb2 (6.ba6 b6=) 6...d5 7.h3 (7.ba6 ba6 8.Nbd2 Bf5=) 7...e6 8.Bd3 (8.ba6 ba6 9.c4 Bb4 10.Bc3 Be7=) 8...Bd6 (8...ab5 9.Bb5 Bd7 10.Bd3+=) 9.0–0 (9.ba6 ba6 10.Ba3 Rb8 11.Bd6 cd6=) 9...c6 (9...ab5!? 10.Bb5 Bd7+=) 10.bc6+= bc6 11.c4 (11.Ba3 Rb8 12.Bd6 Qd6+=) 11...Bb7 (11...Rb8 12.Qc2=) 12.cd5 (12.c5 Bc7+=) 12...cd5= 13.Qa4 Nd7 (13...Qd7 14.Qd7 Kd7 15.Ng5=) 14.Rc1 (14.Ba3 Qb6+=) 14...0–0 15.Nbd2 Nb6 16.Qb3 Rb8 (16...a5 17.Ba3 a4 18.Qb2+=) 17.Ne5 (17.Ba3 Bc8 18.Bd6 Qd6+=) 17...Nd7 (17...a5 18.Ng6 fg6 19.Ba3+=) 18.Nd7 (18.Ng6 fg6 19.Ba3 Ba3 20.Qa3 Qf6+=) 18...Qd7= 19.Qd1 (19.Ba3 Ba8 20.Qc3 Rfc8+=) 19...Ba8 (19...Bc6 20.Nb3=) 20.Rab1 a5 21.a4 (21.Nf3 Rfc8+=) 21...Bc6 22.Bg6 (better is 22.Bc2!?=) 22...fg6–/+ 23.Qg4 Ba4 24.Ba1 (24.e4 Rf4 25.Qe2 Rbf8–/+) 24...Rb1 25.Rb1 (25.Nb1 Qf7 26.Qe2 Bb5–/+) 25...Bc2–+ 26.Rc1 Bf5 27.Qe2 a4 (27...Rc8 28.Rc8 Qc8 29.Qe1–+) 28.Qa6 (28.g4 Be4–+) 28...g5 (28...Bb4!? 29.Qe2 Rc8 30.Rc8 Qc8–+) 29.Rc6 Bb4 30.Bc3 Bc3 31.Rc3 g4 32.h4 (32.hg4 Bg4 33.Rc6 Qd8+=) 32...h6 (32...Qe7 33.Rc8–/+) 33.Rc6 (33.Ra3 Bc2–/+) 33...a3 34.Nb3? (34.Qa3 Qc6 Deflection) 34...Re8 (better is 34...Bd3! 35.Nc5 Ba6 36.Nd7 Bc4 37.Nf8 a2 38.Ne6 a1Q 39.Kh2 Qa8–+) 35.Nc5+= Qe7 36.Qa3 (36.g3 e5 37.de5 Qe5 38.Qa3 d4+=) 36...Qh4–/+ 37.Ra6 (37.Qa2 Rb8 38.e4 de4 39.Ne6 Qe7–/+) 37...g3 38.f3?? (better is 38.fg3 Qg3 39.Ra8 Ra8 40.Qa8 Kf7 41.Qa7 Kf6 42.Qa3–/+) 38...Qh2 (38...Bc2 39.Qc3 Qh2 40.Kf1 Qh1 41.Ke2 Qd1) 39.Kf1 Qh1 40.Ke2 Qg2 0–1. gtate (1965) – sammyo (1875), net–chess.com, 2004.

3.e3 d5

4.Bb2 Qd6 =.

4.Bb2 f6 5.Be5 fe5+= 6.Qh5 g6 7.Qe5 Nf6 8.Nc3 Bg7 9.Qg5?? (9.Nf3!?+=) 9...0–0 (9...Ne4 10.Ne4 Ba1 11.Nc3 Bc3 12.dc3–+) 10.Nf3? (10.Rd1 Bf5=+) 10...c6 (10...Ne4 11.Ne4 Ba1 12.Nc3 Bc3 13.dc3–/+) 11.a4?? (11.bc6 Ne4 12.Ne4 Ba1=+) 11...Bf5?? (better 11...Ne4 12.Ne4 Ba1–+) 12.d3?? (better 12.bc6 Ne4 13.Ne4 Ba1 14.Nc3 Bc3 15.dc3–+) 12...h6 (better 12...Qa5 13.Ra3 h6–+) 13.Qg3 (13.Qh4 Qa5 14.Ra3 Nh5–+) 13...Kh7 (13...Nh5 14.d4 Qa5 15.Qc7 Qc3 16.Ke2 Qa1 17.Ne1–+) 14.Nh4 (14.Qh4 Qa5 15.Ra3 cb5 16.Be2–+) 14...Nh5 15.Qf3 (15.d4 Qa5 16.Ra3 Ng3 17.fg3 Bc2–+) 15...Bc3 16.Kd1 Ba1 17.Nf5 Rf5 18.Qg4 (18.Qe2 Qf8 19.f4 Bc3–+) 18...Qd6 (better 18...Qa5 19.f4 cb5–+) 19.Qh3 Rf2 20.g4 Ng7 (20...Qb4 21.Be2 Bc3 22.Kc1 Qa4 23.Qh5 Qa1) 21.Be2 Raf8 (21...Qb4 22.Qh6 Kh6 23.d4 Bc3 24.g5 Kh7 25.Kc1 Qa4 26.bc6 Qa1) 22.g5 h5 (22...Qb4 23.Qh6 Kg8 24.Qh8 Kh8 25.Re1 Bc3 26.Kc1 Qb2 27.Kd1 Qb1) 23.Kd2 Qb4 24.Kd1 (24.Kc1 Re2 25.Qh5 Nh5 26.c4 Qd2 27.Kb1 Qb2) 24...Qb1 25.Kd2 Qh1 (25...Re2 26.Ke2 Qc2 27.Ke1 Bc3) 26.d4 Qe4 27.Qd7 (27.Qf1 Rf1 28.c3 Rb1 29.bc6 Rb2 30.Ke1 Qe3 31.cb7 Qe2) 27...Bd4! 28.ed4 (28.ed4 Re2 Mate attack) 28...Qe2 29.Kc3 Qc2 30.Kb4 Qd2 31.Kb3 cb5 (31...Qb2) 32.ab5 Qb2 33.Ka4 Qa1 (33...Qd4 34.Ka5 Ra2) 34.Kb4 (34.Kb3 R8f3 35.Kb4 Qa3) 34...Rb2 (34...Qd4 35.Ka5 Ra2) 35.Kc5 Qa3 36.Kd5 Qb3 37.Ke4 (37.Kc5 Rc2) 37...Qf3 (37...Re2) 38.Ke5 Re2 0–1. invictus31 (1605) – necatikimgeldi (1650), lichess.org, 2019.

4.Bb2 f6 5.Nf3 Ng6 6.a4 e5= 7.c4 Be7 8.cd5 Qd5 9.Nc3 Qd8 10.Bc4 Nh6 11.Qb3 Nf5 12.0–0 Nd6 13.Rad1 (13.Bd5 Qd7+=) 13...Nc4 14.Qc4 Qd6 15.d4 (15.Nd5 c6 16.bc6 bc6 17.Ne7 Ne7+=) 15...Be6= 16.d5 Bf5 17.e4 Bg4 18.Ra1 (better 18.Rd3=) 18...0–0?? (better 18...Bf3 19.gf3 Qd7–/+) 19.Nd2 (19.Ba3 Qd7 20.d6 Be6 21.Qc7 Qc7 22.dc7 Ba3 23.Ra3=+) 19...b6? (better 19...Qb4!?+=) 20.Ba3+– Qd7 21.Be7 Qe7 22.d6 (22.a5!?+–) 22...Qf7+= 23.Qf7 (23.Qc7 Rac8 24.Qf7 Kf7+=) 23...Rf7= 24.dc7 Rc7 25.Nd5 Rd7 26.Nc4 Be6? (26...Rad8 27.Nce3 Be6 28.a5=) 27.Nce3 (better 27.Ncb6 ab6 28.Nb6+–) 27...Bd5 28.Nd5 Nf4 29.Nf4 ef4 30.Rfc1 Rad8 31.h3 Kf7 32.Rc2 g5 33.Rac1 (33.a5 Re8 34.Rc6 ba5=) 33...h5 34.Kf1 (34.Rc6 Ke7=) 34...Ke6 35.Ke2 Kf7 (35...Rd4 36.Rc4=+) 36.g3 Kg6 (better 36...Rd4!? 37.Rc4 Rd2 38.Kf1 f3=+) 37.gf4+– gf4 38.Rg1 Kf7 39.Kf3 Ke6? (better 39...Re7!? 40.Kf4 Rd4+=) 40.Kf4+– Rd2 41.Rc6 Kf7 42.f3 R8d7 (42...R2d3 43.Rgc1+–) 43.Rc8 (43.Kf5 R2d6 44.Rd6 Rd6+–) 43...R2d3 (43...Rh2 44.h4 Rh3 45.Rh8+–) 44.Rgg8 (better 44.Rcg8+–) 44...Ke7??+– (44...Ra3 45.Rgf8 Kg7 46.h4+–) 45.Rce8!+– 1–0. BeepBeepImAJeep (2530) – kamil_75 (1970), lichess.org, 2016.

4.Bb2 Bg4?? 5.f3+– Bf5 6.Be5 f6 7.Bb2 e5 8.c4 d4 9.e4 Be6 10.d3 Bb4 11.Nd2 c5 12.a3 Ba5 13.g3 b6 14.Nh3 (14.Bh3 Qd6+–) 14...Ne7 15.Bg2 Ng6 16.0–0 Bc3 17.Qc2 Bb2 18.Qb2 0–0 (18...Qd7 19.Nf2+–) 19.a4 (19.f4 Bd7+–) 19...a5 20.f4 f5 (20...Bh3 21.Bh3 ef4 22.gf4+–) 21.ef5 (21.Ng5!? Bd7 22.ef5 Bf5 23.Bd5 Kh8 24.Nf7 Rf7 25.Bf7 Bd3 26.Bg6 Bf1 27.Rf1 hg6 28.fe5 Qe7+–) 21...Bf5 22.Ba8 Qa8 23.Nf2 ef4 24.g4 (24.Rae1 Qc8+–) 24...Bd7 25.Nde4 (25.h3 Ne5 26.Kh2 Nf3 27.Nf3 Qf3+–) 25...Qc8 (25...Ne5 26.Qe2+–) 26.h3 Nh4 27.Qe2 Qe8 28.Rae1 Qe6 29.Ng5 Qe2 30.Re2 Re8 (30...h6 31.Ne6 Rf7 32.Nc7+–) 31.Re8 Be8 32.Re1 Kf8 (32...Bg6 33.Re6 h6 34.Nge4 Nf3 35.Kf1 Be4 36.Ne4+–) 33.Kf1 (33.Nh7 Kg8 34.Ng5 Kf8+–) 33...h6 (33...Bf7 34.Nh7 Kg8 35.Ng5+–) 34.Ne6 Kg8 35.Ng7! Kg7 36.Re8 Kg6 (36...Nf3 37.Rb8 Nd2 38.Ke2+–) 37.Re6 (37.Re6 Kf7 38.Rb6+–) 1–0. Fournier,Frederic – Demarche,Svetlana, Open Paris FRA, 1998.

4.d3 Nf6 5.Bb2 Ng6 6.Nf3 Bg4 7.Be2 Qd7 8.a4 a6 9.Nbd2 e6 10.0–0 Be7 11.c4 0–0 12.d4 (12.Qc2 ab5 13.ab5 Rfd8=) 12...dc4 13.Bc4 ab5 14.Bb5 c6 (14...Qd5 15.Bc4 Qa5 16.Qb3=) 15.Bd3 Bd6 (15...Rfd8 16.Qb3=) 16.Qb3 Nd5 (16...Rfd8 17.Rfb1=) 17.h3 (17.Ba3 f5+=) 17...Bf3= 18.Nf3 Nb4 (18...b6 19.Bg6 hg6 20.e4+=) 19.Bc4 (19.Bg6 hg6 20.Ba3 Nd5+/–) 19...Rfe8 (19...b5 20.Be2=) 20.Ng5 (20.Ba3 Na6+=) 20...Nd5= 21.f4 (21.Rfb1 Bc7=) 21...h6 22.Ne4 Ra5 23.Nd6 Qd6 24.e4 (24.g3!? Qc7 25.Rfb1=) 24...Ndf4+= 25.e5 (25.Qb7?? Rb8 26.Qb8 Qb8–+) 25...Qe7 26.Qf3 (26.Rf2 Rd8+=) 26...Qb4 (26...Rea8 27.Bb3–/+) 27.Bc3+= Qc4 28.Ba5 Qd4 29.Kh1 Qe5 (better is 29...Qd5 30.Bc7 Qf3 31.Rf3 Nd5=) 30.Bd2+/– Ne2 31.Rae1?? (better is 31.Qf7 Kh7 32.Qe8 Ng3 33.Kg1 Qd4 34.Kh2 Nf1 35.Rf1 Qd6 36.Kh1 Qd2 37.Qe6+/–) 31...Ng3–/+ 32.Kg1 Qc7 (better is 32...Nf1 33.Re5 Nd2–/+) 33.Ba5? (better is 33.Rf2–/+) 33...b6–+ (33...Qa5?! 34.Qf7 Kh7 35.Qe8 Nf1 36.Rf1–/+) 34.Bb6 (34.Bd2 Nf1 35.Rf1 Ra8–+) 34...Qb6 35.Rf2 Qc7 (35...Nf5 36.Qc3–+) 36.Rc2 Nf5 (36...Ne7 37.Ra2–+) 37.Rc5 (37.Qc6 Qa7 38.Rc5–+) 37...Ra8 (37...Rd8 38.Kh1 Rd5 39.Rd5 cd5 40.Qb3–+) 38.Ra1 (38.Rc6 Qa7 39.Qf2 Qf2 40.Kf2 Ra4–+) 38...Qd6 (38...Nf4 39.Rd1–+) 39.Rac1 (39.Qc6 Qd4 40.Kh2–+) 39...Ne5 (worse is 39...Ra4 40.Qc6 Qd4 41.Kh1–+) 40.Qf4 (40.Qe4 f6–+) Nd3 (40...Nd3 41.Qd6 Nd6 42.Rc6 Nc1 43.Rc1 Ra4–+) 0–1. Heindrich,Janos (2050) – Kristof,Peter (1935), Miskolc Avas op–B, 1999.

4.d4 Nc4 =.

4.d4 Ng6 5.Nf3 (5.c4 Nf6=) 5...Bd7 (5...Bg4 6.Be2=) 6.c4 (6.Bd3 Nf6+=) 6...e6 7.Nbd2 (7.Nc3 dc4 8.Bc4 c6+=) 7...Nf6 8.c5 c6 9.a4 (9.bc6 Bc6 10.Qc2=) 9...cb5 (9...b6!?=) 10.ab5+= Be7 11.Bd3 0–0 12.0–0 Qe8 13.Qb3 a6 (13...Qc8 14.Qb4+–) 14.ba6 Ra6 (14...ba6 15.Ra6 Ra6 16.Ba6+–) 15.Ba6+– ba6 16.Ra6 (16.Re1 Qa8+–) 16...Bb5 17.Rb6 (17.Ra7 Bf1 18.Nf1 Ne4+–) 17...Bf1+– 18.Nf1 Nd7 (18...e5 19.Ne5 Ne5 20.de5+–) 19.Rb7+– Qc8 (19...Nf6 20.Ra7+–) 20.Qb5 Nb8 21.Bb2 (better 21.Bd2+–) 21...Qc6?? (better 21...Nc6+–) 22.Rb8 Rb8 (22...Qc7 23.Rb7 Qd8+–) 23.Qc6 Rb2 24.Qe8 Bf8 25.c6 Ne7 (25...Rc2 26.Qd7 h6+–) 26.Ne5 f6 27.Qf7 (27.Qf7 Kh8 28.Qf8 Ng8 29.Nf7) 1–0. GuestNVBF – GuestQPZW, freechess.org, 2020.

4.d4 Ng6 5.Nf3 Nf6 6.Be2 e6 7.0–0 Bd6 8.Bb2 0–0 9.Nbd2 Ne4 (9...a6 10.a4=) 10.c4 Nd2 11.Qd2 dc4 12.Bc4 Qf6 13.Be2 Qf5 14.a4 Qh5 15.h3 f5 16.Ne5 Qh6 17.Ng6 Qg6 18.f4 a6 19.Bf3 ab5 20.ab5 Ra1 21.Ra1 Bd7 22.Qd3 Be8 (22...Qe8!?+=) 23.Bb7+– Qg3 24.Bf3 Rf6 25.Bc3 Rg6 26.Kf1 Qh2 27.Be1 (better 27.Ra8!? Kf7 28.Ra7+–) 27...Qh1+– 28.Ke2 (better 28.Kf2!? Be7 29.Qc4+–) 28...Rg2= 29.Bg2 Qg2 30.Kd1 Bh5 31.Kc1 Be2 (31...Qh3 32.Qb3 Kf7 33.d5 ed5 34.Qd5 Ke7 35.Qd3=) 32.Qc3 (better 32.Ra2!? Bd3 33.Rg2 Bb5 34.Ra2+–) 32...Kf7 (better 32...Bb5 33.Qb3 Bd7=+) 33.Ra2 (33.Ra2 Qf1 34.b6 cb6 35.Ra7 Kg6 36.d5=; 33.b6!? cb6 34.Ra7 Kg6 35.d5+–) 1–0. BeepBeepImAJeep (2590) – m_erdeniz (1735), lichess.org, 2018.

4.Bb2 Ng6

5.c4 e6 6.cd5 ed5 7.Nf3 Bg4 8.Be2 Nf6 9.Nc3 Bd6 10.h3 Bd7 11.a4 0–0 12.0–0 Ne5 (better is 12...Re8!?=) 13.Nd5!+/– Nd5 14.Ne5 Qf6? (better is 14...Be6+/–) 15.Nd7+– (15.Nd7 Qb2 16.Rb1+–) 1–0. Fournier,Frederic (2080) – Hoodwinker, Active, 2005.

5.c4 e6 6.Nf3 Nf6 7.a4 Be7 8.Be2 0–0 9.0–0 Nd7 10.cd5 ed5 11.d4 c6 12.Nc3 Nb6 13.Ne5 (13.a5 Nc4 14.Bc4 dc4 15.bc6 bc6+=) 13...Bf6 (13...Ne5 14.de5 Qc7 15.Qd4=) 14.bc6 (14.a5!? Be5 15.ab6+–) 14...Be5 15.cb7 Bb7 (15...Bh2 16.Kh2 Bb7 17.Rh1=) 16.de5+– Ne5 17.Qd4 Nc6 18.Qg4 Bc8 19.Qg3 f6 20.Nb5 Be6? (20...a5 21.Rfd1+–) 21.Bf3 (better 21.Nc7 Qe7 22.Ba3+–) 21...Ne7 22.Nc7 Qd7? (better 22...Nf5 23.Qf4 g5 24.Ne6 gf4 25.Nd8 Rad8 26.ef4 Nc4+–) 23.Na8+– Ra8 24.a5 (24.Rfc1 Nf5 25.Qf4 Rc8+–) 24...Nf5 25.Qf4 Nc4 26.Bc3 (26.e4 Nb2 27.ef5 Bf5+–) 26...g5 27.Qg4 Nfe3 28.Qh5?? (28.fe3 Bg4) 28...Nf1=+ 29.Rf1 Bf7 (better 29...Qf7=+) 30.Qh6+– Qf5 31.Bf6 Threatening mate... how? 31...Qg6 32.Qg6 hg6 33.Bg5 Re8 (33...Na5 34.Rd1 Rb8+=) 34.Bc1 (better 34.a6!?+–) 34...Rd8 (better 34...Na5!? 35.Be3 Nc4=) 35.Bd1 (35.Bd1 Na5 36.Bg5=; better 35.Be3!? a6 36.Rd1+=) 1–0. BeepBeepImAJeep (2540) – Gilevich (2360), lichess.org, 2018.

5.Bd3 Nh4 6.g3 Nf5 7.Ne2 Nd6 8.Nf4 e6 9.Nh5 Qg5 10.f4 Qh6 11.Bd4 Ne4 12.Be4 de4 13.Nc3 Qg6 14.Be5 Nh6 15.Bc7 Bb4 16.Be5 f6 17.Bd4 0–0 18.Qe2 Ng4 19.h3 Bc3 20.Bc3 Qh5 21.Rh2 Bd7 22.a4 Nh2 23.Qh5 Nf3 24.Kf2 f5 25.Be5 Be8 26.Qf3 ef3 27.Kf3 a6 28.b6 Rc8 29.c3 Rc4 30.a5 Ra4 31.Ra4 Ba4 32.Ke2 Rc8 33.Bd4 h5 34.h4 Bc6 35.d3 Kf7 36.Be5 g6 37.Bc7 Ke7 38.c4 Kf7 39.Kd2 Bg2 40.Kc3 Re8 41.Kd4 Re7 42.Bd6 Rd7 43.c5 Bc6 44.e4 Kg7 45.Ke3 Kf6 46.Kd4 fe4 47.de4 Rd8 48.Kd3 Kg7 49.Kd4 Kf7 50.Kd3 Rc8 51.Kd4 Bb5 52.Be5 Bc6 53.Bd6 Bb5 54.Be5 Kg8 55.Bf6 Re8 56.Ke5 Bc6 57.Bg5 Rc8 58.Bf6 Be4 59.Ke4 Rc5 60.Bb2 Ra5 61.Bd4 Rb5 62.Bf2 Rb3 63.Ke5 Rf3 64.Bd4 Kf7 65.Kd6 Rd3 66.Kc7 Rd4 67.Kb7 a5 68.Ka6 e5 69.b7 Rd8 70.Kb6 ef4 71.Kc7 Ke8 72.gf4 0–1. Green Light Chess v2.15c – Cilian413, computer chess game, 2001.

5.Nf3 Nf6 6.a4 e6 7.c4 a6 8.Nc3 ab5 9.ab5 Ra1 10.Qa1 Be7 11.Be2 0–0 12.0–0 c6 (12...dc4 13.Bc4 Bd6 14.d4+=) 13.d4 Bd7 14.c5 cb5 15.Bb5 Bc6 16.Qa4 Qa8 17.Ra1 Qa4 18.Ra4 Rb8 19.g3 Ne4 20.Rb4 Nc3? (20...Ra8 21.Ne4 de4 22.Bc6 bc6 23.Nd2+–) 21.Bc3 (better 21.Bc6 Nd1 22.Bb7+–) 21...f6?? (better 21...Ra8+=) 22.Bc6+– Ra8 (22...Bd8 23.Rb7 Rb7 24.Bb7+–) 23.Rb7 Ra2 (23...Ra3 24.Bb4 Ra1 25.Kg2+–) 24.h4 (24.Be8 Rc2 25.Be1 e5 26.Bg6 hg6 27.Re7 g5+–) 24...h5 (24...Kf7 25.Rb8 f5 26.Kg2+–) 25.Be8 Nh4 (25...Kh7 26.Bg6 Kg6 27.Re7+–) 26.Nh4 Bc5 (26...g5 27.Ng6 Bd8 28.e4+–) 27.dc5 e5 28.Bg6 Kf8 (28...Ra8 29.c6 Kh8 30.c7 Rf8 31.Rb8 Kg8 32.c8Q Rc8 33.Rc8) 29.c6 Rb2 (29...Ra8 30.c7 Rc8 31.Bb4 Kg8 32.Rb8 Rb8 33.cb8Q) 30.Bb4 (30.Bb2 e4 31.Ba3 Kg8 32.Rb8) 30...Rb4 31.Rb4 (31.Nf5 d4 32.Rb4 de3 33.Rb8) 31...Ke7 32.Rb7 Kd6 33.Be8 (33.c7 Kd7 34.Bf5 Kd6 35.c8Q d4 36.Rd7) 33...g5 (33...e4 34.c7 Ke5 35.c8Q Kd6 36.Nf5 Ke5 37.Re7) 34.c7 gh4 (34...e4 35.Nf5 Ke5 36.c8Q d4 37.Rb5) 35.c8Q e4 36.Qc7 Ke6 37.Qd7 (37.Bf7 Kf5 38.Qf4) 37...Ke5 38.Qe7 (38.Bf7 hg3 39.Qd5) 38...Kf5 39.Rb6 (39.Qd6 d4 40.Qf4 Ke6 41.Bf7) 39...hg3 (39...d4 40.Qf6 Kg4 41.Bd7) 40.Rf6 (40.Qf6 Kg4 41.Bd7) 40...Kg4 41.Bd7 Kg5 (41...Kh4 42.Rc6) 42.Qg7 (42.Rc6) 42...Kh4 43.Rf4 (43.fg3) 1–0. BeepBeepImAJeep (2625) – Gilevich (2330), lichess.org, 2017.

5.Nf3 Nf6 6.c4 e6 7.a4 a6 8.Nc3 Bd6 9.Be2 0–0 10.0–0 Qe7 11.d4 White gets the initiative 11...ab5? (better 11...dc4!? 12.Bc4 ab5 13.Nb5 b6=) 12.c5+– (12.Nb5?! Bb4=; 12.ab5?! Ra1 13.Qa1 dc4 14.Bc4 Ng4=; 12.cb5?! Ra5=) 12...Bh2 13.Nh2 ba4 14.Ra4 Ra4 15.Qa4 c6 16.Qb3 e5 17.Nf3 e4 18.Nd2 Ng4 19.Bg4 Bg4 Black gets strong initiative 20.Re1 Qg5 21.Nf1 (21.g3 Bc8+–) 21...Bf3 The mate threat is Qxg2 22.Ng3 Nh4 23.Nce2 (23.Ra1 Bg2 24.Qb7–+) 23...Ng2 24.Ra1 Qh4?? (better 24...h5 25.Qb7 h4–/+) 25.Nf4?? (better 25.Qb7 Qf6 26.Ra8+–) 25...Nf4–+ 26.ef4 (26.Kf1 Nd3 27.Qd3 ed3 28.Ke1–+) 26...Qf4 (26...Qh3 27.Qf3 ef3 28.Ra7 Qg2) 27.Qe3?? (27.Qb7 e3 28.Ra3–+ (28.Qc6 ef2 29.Kf2 Bg4 30.Kg1 Qg3 31.Kf1 Qf3 32.Kg1 Qe3 33.Kg2 Qe2 34.Kg3 Qf3 35.Kh4 Qh3 36.Kg5 f6 37.Qf6 gf6 38.Kf4 Qf3)) 27...Qg4 (27...Qh4 28.Qe1 f5 29.Bc1–+) 28.Kf1 h5 (28...f5 29.Ne2 g5 30.Ke1–+) 29.Ke1? (29.Ne2 f5 30.Bc1 h4–+) 29...h4 (better 29...f5 30.Qb3 f4–+) 30.Nf1–/+ h3 31.Bc1?? (better 31.Kd2!?–/+) 31...h2 (better 31...Qg1 32.Qf4 Bg2–+) 32.Nh2 Qg2?? (better 32...Qg1 33.Nf1 f5–+) 33.Nf1 (33.Nf3 Qf3 34.Ra7 Qh1 35.Ke2 f5+–) 33...Bg4 (33...Qg1 34.Qd2 f5–+) 34.Qg3 Qg3 35.Ng3 Bf3 (35...f6!?+=) 36.Bf4 (36.Nf5 Rd8+–) 36...f5+– 37.Nf1 Kf7 38.Be5 (38.Ra7 Kf6+–) 38...g5 39.Kd2 (39.Kd2 Kg6 40.Nh2+=; 39.Nd2!?+–) 1–0. BeepBeepImAJeep (2665) – J_Heral (1630), lichess.org, 2017.

5.Nf3 Nf6 6.c4 e6 7.Nc3 dc4 8.Bc4 Bd6 9.Qc2 0–0 10.0–0 c5 (10...a6 11.ba6 ba6 12.d4+=) 11.e4 (11.bc6!? bc6 12.d4+=) 11...b6 (better 11...Ne5 12.Ne5 Be5=) 12.e5 (better 12.a4!?=) 12...Ne5–/+ 13.Ne5 Be5 14.Rfe1 Qc7 15.h3 Bb7 16.d3 Bd4 (better 16...Rfd8–/+) 17.Re6?? (better 17.Ne4 Qe5 18.Bd4 Qd4 19.a4–/+) 17...fe6–+ 18.Be6 Kh8 19.Re1 Qg3 (19...Ng4 20.Bg4 Qg3 21.Ne4 Be4 22.Re4 Rf2 23.Qf2 Bf2 24.Kf1 Qd3 25.Kf2 Rf8 26.Bf3 Qe4 27.Bg7 Kg7 28.h4–+) 20.Ne4 (20.Nd5 Nd5 21.Bd4 Qg2 22.Kg2 Ne3 23.Kg1 Nc2 24.Bc5 Ne1 25.Bf8 Rf8 26.Bc4–+) 20...Ne4 21.de4 (21.Bd4 Nf2 22.Bg7 Kg7 23.Qb2 Kg6 24.Bf7 Rf7 25.Re6 Kf5 26.Rf6 Rf6 27.Qf2 Qf2 28.Kf2 Kg5 29.Ke1 Re8 30.Kd2 Rf2 31.Kc3 Re1 32.h4 Kg4 33.Kc4 Rc1 34.Kb3 Bd5 35.Ka4 Ra2) 21…Rf2 (21...Rf2 22.Qf2 Qf2 23.Kh2 Bb2 24.h4 Be5 25.Kh3 Qg3) 0–1. GuestKKQL – GuestCBWB, freechess.org, 2018.

5.Nf3 h5 6.c4 e6 7.a4 Bc5 (7...dc4 8.Bc4 Nf6 9.d4+=) 8.Be2 (8.Bg7 Rh7 9.Bc3 Bd6+–) 8...e5 (8...Nf6 9.0–0+=) 9.Ne5+– White launches an attack 9...Ne5 10.Be5 Nf6 11.0–0 0–0 (11...dc4!? 12.Bc4 Ng4+–) 12.d4+– Bd6 13.Bf6 Qf6 14.cd5 h4 15.Nc3 Qg5 16.f4 Qg6 17.Bd3 Qh6 18.Qf3 Bd7 19.Ne4 Rfe8 20.Ng5 Be7 21.Ne4?? (21.Rac1 Rac8+–) 21...Bd8?? (21...Bd6 22.f5 h3+–) 22.Rac1 f6 (22...h3+–) 23.Nc5 (23.d6!? f5 24.Nc5 Qd6 25.Bc4 Kf8 26.Nb7 Qe7+–) 23...Bc8 24.e4 (24.d6 cd6 25.Qd5 Kh8+–) 24...b6 (24...Be7 25.f5+–) 25.Ne6 Bd7 (25...Be6 26.de6 Rc8 27.Bc4+–) 26.f5 (26.Nc7 Bc7 27.Rc7 Red8+–) 26...Be7 (26...Be6 27.de6 Rc8 28.Qf4+–) 27.Rc7 Bd6 (27...Be6 28.de6 Rad8+–) 28.Rd7 Rad8 (28...Bf8+–) 29.Rd8 (better 29.Nd8!? Ba3+–) 29...Rd8 30.Nd8 Be7 31.Nc6 (better 31.Nb7 Kh7+–) 31...Kf7 32.e5 fe5 33.de5 Qg5 34.d6 Bf8 35.e6 (35.Qd5 Ke8 36.d7) 35...Kg8 36.e7 Be7 (36...a6 37.Qd5 Kh7 38.f6 Kh6 39.Qg5 Kg5 40.e8Q h3 41.Rf5 Kh6 42.Qh5) 37.de7 Kh7 (37...Qe7 38.Ne7 Kf7 39.Qd5 Ke7 40.Re1 Kf6 41.Qd8 Kf7 42.Bc4) 38.f6 (38.e8Q Qh6 39.Qfh5 Qh5 40.Qh5 Kg8 41.Bc4 Kf8 42.Qf7) 38...Kh6 (38...g6 39.e8Q Qc5 40.Qf2 Qf2 41.Kf2 h3 42.Qg6 Kh8 43.Qe8) 39.f7 (39.e8Q Qc5 40.Qf2 Qf2 41.Rf2 gf6 42.Qg6) 39...Qg6 (39...Qc5 40.Kh1 Qd6 41.Qe3 g5 42.f8Q Kh5 43.Qef3 g4 44.Q3f5) 40.f8Q Qd3 (40...a6 41.Qh8 Qh7 42.Qh7 Kg5 43.Qg7) 41.Qh8 (41.Q3f4 Kh7 42.Qh4 Kg6 43.e8Q) 41...Kg6 (41...Qh7 42.Qh7 Kh7 43.Qh5 Kg8 44.e8Q) 42.Qf7 (42.Qg4) 42...Kg5 43.Qhg7 (43.Qhh5) 43...Qg6 44.Qfg6 (44.Qgg6?!=) 1–0. BeepBeepImAJeep (2570) – BOKHODOM (1940), lichess.org, 2017.

3.e3 d6

4.Bb2 Bd7 5.Nf3 Nf6 (5...Nf3!? 6.Qf3 c6=) 6.Ne5+– de5 7.Be5 e6 8.Qf3 Be7 (better 8...Nd5!?+–) 9.Qb7+– Rb8 (9...0–0+–) 10.Qa7 (10.Qc7?! Qc7 11.Bc7 Rb7+–) 10...Bb5 (10...Bd6 11.Bf6 gf6+–) 11.Bc7 Ra8 12.Bb5 Kf8 13.Qb6 Qc8 14.Nc3 Ne8 15.Be8 Ke8 16.Qc6 Kf8 17.Rb1 g6 (17...h6 18.e4+–) 18.Rb7 Kg7 (18...h6+–) 19.Be5 Bf6 20.Bf6 Kf6 21.Qf3 Kg7 22.Qf7 Kh6 23.Qg7 Kh5 24.g4! Kg4 (24...Kg4 25.Rg1 Mate attack) 25.Rg1 Kh5 26.Qh7! Rh7 (26...Rh7 27.Rh7 Mate attack) 27.Rh7 1–0. Pereira – Lillilu, internet, 2020.

4.Bb2 Nf6 5.Be2 g6 6.c4 Bg7 7.Nf3 (7.d4 Ned7+=) 7...Nf3= 8.Bf3 0–0 9.0–0 Rb8 (9...e5 10.Nc3=) 10.a4 e5 11.d3 b6 (11...Be6 12.Nd2=) 12.Nd2 Bf5 13.d4 e4 14.Be2 Qd7 15.Qc2 (15.h3 d5+=) 15...Rfe8 (15...c6 16.h3+=) 16.Rad1 Rbc8 17.Nb3 White plans c5 17...Qe7 18.c5 d5 19.c6 (19.a5 Bg4+=) 19...Qd6= 20.h3 Qe7 (20...g5 21.Ra1+=) 21.Ra1 White intends a5 21...Kh8 (21...g5 22.Ba3 Qe6 23.Ra2+=) 22.a5+– Red8 23.ab6 ab6 24.Qd2 (24.Ra6 Ne8+–) 24...Ra8+= 25.Ra8 Ra8 26.Ra1 Ra1 27.Na1 h5 (27...Ne8 28.Bc3=) 28.Nc2+= Nh7 29.Nb4 Qg5 (29...Nf6 30.Qc3+–) 30.Kh1 (30.Nd5 Bh3 31.Nf4 Bf5+–) 30...Qh4 (30...Nf6 31.Na6 Ne8 32.Ba3+=) 31.Bf1 (31.Nd5 Qf2 32.Bc3+=) 31...Qd8+= 32.Qc2 Bf8 33.Qb3 Nf6 34.Ba3 Be6 35.Na6 Ba3 36.Qa3 Nh7 (36...g5 37.Be2+=) 37.Be2 Kg7 38.Kh2 Nf6 39.f3 Bc8 (39...ef3!? 40.Bf3 Bf5=) 40.f4 Ne8 41.Nb4 Be6 42.Nc2 (42.Kg1 Qh4 43.Nc2 Nd6=) 42...Nd6= 43.Qb2 (43.Qa7 Nf5 44.Kg1 g5=) 43...Nf5 44.g3 Qe7 (44...Qa8=+) 45.Qb4 (better 45.Kg2!?=) 45...Qb4–/+ 46.Nb4 Ne3 47.Na6 Nf5 48.Nc7 Nd4 49.g4 Ne2?? (better 49...hg4 50.Bg4 f5–/+) 50.Ne6+– Kf6 (50...fe6 51.c7 hg4 52.hg4 Nf4+–) 51.c7 Ke6 (51...fe6 52.c8Q Nf4 53.Qd8 Ke5 54.Qc7 Kd4 55.Qb6 Kd3+–) 52.c8Q Kf6 53.g5 Kg7 54.Qc7 d4 (54...Nc1 55.Qc1 Kg8 56.Qc6+–) 55.Qe5 (55.Qb6 d3 56.Qf6 Kh7 57.Qf7 Kh8 58.f5 Nf4 59.b6 Nd5 60.b7 Nc7 61.b8Q Ne8 62.Qbe8) 55...Kg8 (55...Kh7 56.Qe8 Kg7 57.Qe4+–) 56.Qe4 d3 57.Kg2 (57.f5!? gf5 58.Qc4 Kg7 59.Qd3 Nc1 60.Qc3 Kf8 61.Qc1 Kg7+–) 57...Kg7 58.Kf2 h4 59.Ke3 Ng3 60.Qd4 Kh7 61.Qb6 d2 62.Kd2 Nf5 63.Qf6 Kg8 (63...Ng3 64.Qf7 Kh8 65.Qe8 Kh7 66.b6 Kg7 67.Qe7 Kg8 68.b7 Ne4 69.Ke3 Nd6 70.b8Q Nc8 71.Qc8) 64.b6 (64.b6 Ng3 65.Qd8 Kg7 66.b7 Ne4 67.Ke3 Nd6 68.b8Q Ne8 69.Qe8 f6 70.Qc7) 1–0. retiponziani (2000) – curry corner (2090), ChessWorld.net, 2017.

4.Bb2 Ng6 5.a4 Nf6 6.c4 e5 7.Nf3 Be7 8.Be2 0–0 9.d4 a6 (9...Re8 10.de5 de5 11.Qd8 (11.Be5? Ne5 12.Qd8 Nf3 13.Bf3 Rd8–+) 11...Bd8 12.0–0=) 10.Nc3 (10.de5 de5 11.Qd8 Rd8 12.Ne5 Bb4 13.Kf1 Bf5+=) 10...ed4= 11.Nd4 ab5 12.ab5 Ra1 13.Qa1 Bd7 14.0–0 Re8 15.Bf3 Bc8 16.Nd5 Nd5 17.Bd5 Bf6 18.Rd1 Nf8 19.Nf3 Ne6 (19...Bb2!? 20.Qb2 Nd7+=) 20.Bf6+– Qf6 21.Qf6 gf6 22.Nh4 Nc5 23.h3 Be6 24.g4 Ra8 25.Nf5 Bf5 26.gf5 Kf8 27.Kg2 Ke7 28.Kf3 Rg8 29.h4 h6 30.Ra1 Rb8 31.Ra7 Kd8 32.Ke2 (32.Kg4 Ke7+–) 32...Ke7+– 33.f4 Ke8 34.Kf3 Ke7 35.e4 Ke8 36.Ra1 Ke7 37.Rg1 (37.h5 Nb3 38.Ra7 Nc5+–) 37...Ra8? (better 37...Kf8=) 38.Rg7+– Ra3 39.Kg4 (39.Kg4 c6 40.bc6 bc6 41.Rf7 (worse 41.Bc6 Kf8 42.Rh7 Kg8 43.Rh6 Kg7–+) 41...Ke8 42.Rf6 cd5 43.cd5+–) 1–0. BeepBeepImAJeep (2555) – Gilevich (2345), lichess.org, 2018.

4.Bb2 Ng6 5.c4 Nf6 6.a4 (6.Bf6 gf6 7.h4 e5=) 6...a6 7.Nc3 e5 8.Nf3 Be7 9.Be2 0–0 10.0–0 a5 11.d4 b6 12.de5 White fights for the Initiative 12...de5 White creates threats along the open d–file 13.Qc2 Bg4 14.Rad1 Qc8 (14...Bd6 15.h3 Bd7 16.Nd5 Nd5 17.cd5+=) 15.Nd5 Nd5 16.Rd5 Now all is on e5 16...Bd6 17.Ne5 Be5 18.Be5 (worse 18.Re5 Ne5 19.Be5 Be2 20.Qe2 Qe6=+) 18...Ne5 (18...Be2 19.Qe2 c6 20.bc6 Ne5 21.Re5 Qc6 22.Rb5+–) 19.Re5 Be2 20.Qe2 Re8 21.Rd5 Rd8 22.Rfd1 Rd5 23.Rd5 Qe8 24.Qd3 h6 25.h3 c6 26.Rd7 cb5 27.cb5 Rc8 28.Qd5 Rb8 29.Kh2 Rc8 30.e4 Rc5?? (better 30...Qf8+–) 31.Rd8 (31.Rd8 Rc8 32.Re8 Re8 33.f4+–) 1–0. BeepBeepImAJeep (2585) – Gilevich (2435), lichess.org, 2016.

4.Bb2 Ng6 5.Nf3 e5 6.Be2 Nf6 7.c4 Be6 8.Nc3 Be7 9.0–0 0–0 10.Ng5 Qd7 11.Ne6 Qe6 12.d3 d5 13.cd5 Nd5 14.Nd5 Qd5 15.Bf3 Qb5 16.Rb1 c6 17.Ba3 Qb1?? (better is 17...Qa6 18.Bc1 Rad8=+) 18.Qb1+– Ba3 19.Qb7 Rab8 20.Qa7 Bd6 21.Bc6 Rfc8 22.Bd5 Ne7 23.Bc4 Nc6 (23...Bc5 24.Qd7 Rd8+–) 24.Qf7 Kh8 25.g3 (better is 25.Qd7 Bf8 26.Ba6 Ne7 27.Bc8 Rc8+–) 25...e4 (25...Rd8 26.a4+–) 26.Bd5 ed3 27.Bc6 Rc6 28.Rd1 Rbc8 29.Rd3 h6 30.Qd7 Be5 31.f4 Bf6 32.e4 Rc1 33.Kf2 R8c2 34.Ke3 Bb2 35.Rd2 Rd2 36.Qd2 Rb1 (36...Ba3 37.Qa5 Bb2 38.e5 Rc3 39.Ke4 Rc4 40.Kf5+–) 37.Qd8 Kh7 38.e5 Bc1 (38...Re1 39.Kf3 Ra1 40.Qd3 Kh8 41.Qd2 Ra2 42.Kg2+–) 39.Kf3 (39...Bf4 40.Qd3 Kh8 41.gf4+–) 1–0. MammaMia – jones662, Live Game Caissa's Web, 2004.

4.d4 b6?? 5.de5+– de5 6.Qd8 Kd8 7.Nf3 Bb7 (7...f6 8.Bc4+–) 8.Ne5 f6 (8...Ke8+–) 9.Nf7 (9.Nf7 Kd7 10.Nh8+–) 1–0. DEFFM – josebahamon, freechess.org, 2019.

4.d4 Ng4 5.Be2+= Nf2? (better 5...N4f6+=) 6.Kf2+– e5 (6...Nf6 7.Nf3+–) 7.de5 Qh4 8.g3 Qe4 9.Nf3 Bg4 (9...de5 10.Bd3 Qd5 11.Bb2+–) 10.Nc3 Qf5 11.e4 Qe6 (11...Qh5+–) 12.Nd4 Qe5 (12...Be2 13.Ne6 (13.Nde2?! de5 14.Qd5 Qd5 15.Nd5 0–0–0+–; 13.Nce2?! Qe5 14.Nc3 Nf6+–; 13.Ke2?! Qe5 14.Kf2 Nf6+–; 13.Qe2?! Qe5 14.Qc4 Qc5 15.Qc5 dc5+–) 13...Bd1 14.Nc7 (14.Nd1?! fe6 15.Bb2 de5=) 14...Kd7 15.Na8 (15.Rd1?! Kc7 16.Ba3 de5 17.Nd5 Kd7+–; 15.Nd1?! Kc7 16.Bf4 de5 17.Be5 Kd7+–) 15...Bc2 16.Bf4 de5 17.Be5+–) 13.Bg4 Qd4 (13...Nf6 14.Bf3 g5+–) 14.Qd4 f6 15.Nd5 Kd8 16.Qc3 (16.Qc3 Be7 17.Be6+–) 1–0. DEFFM – ItoPoupou, freechess.org, 2018.

4.d4 Ng6 5.Nf3 h6 6.Bd3+= Bg4 7.h3 Bf3 8.Qf3 d5 9.Bg6 (9.Qg3 Qd6 10.Qd6 ed6+=) 9...fg6+= 10.e4 (10.c4 e6 11.Qg3+=) 10...Qd6 (10...e6!?+=) 11.ed5+– Nf6 (11...Qb4 12.Nc3+–) 12.c4 c5 (12...e6 13.Qe3 0–0–0 14.Ba3+=) 13.dc6 (13.Bf4 Qb6 14.dc5 Qc5+–) 13...bc6 (13...Qd4 14.Nc3 bc6 15.Qc6 (15.bc6?! Rc8=) 15...Kf7 16.Bb2 (16.Qa8 Qc3 17.Ke2 Qa1 18.Qa7 Ne4–/+) 16...Qe5 17.Kf1+–) 14.Qc6 Qc6 15.bc6 e6 (15...Rc8 16.Bf4+–) 16.0–0 (16.Nd2 0–0–0 17.Nf3 Bb4 18.Bd2 Bd2 19.Kd2 Rd6+–) 16...Bd6 (16...0–0–0 17.Be3 Rd6 18.Na3 Rc6 19.c5+–) 17.Re1 (17.Nc3 Rc8 18.Rb1 Rc6+–) 17...Kf7 18.Nd2 (18.Na3 Rhc8+–) 18...Rac8 19.c5 Bf4 (19...Bb8 20.Rb1 Rc6 21.Nc4+–) 20.Rb1 Rc6 21.Nc4 g5 1–0. DEFFM – GuestCMCP, freechess.org, 2020.

4.Nf3 Bg4 5.Be2 Nf6 6.Bb2 Bf3 7.Bf3 Rb8 8.a4 e6 9.Be5 (9.Be2!?+=) 9...de5= 10.0–0 e4 11.Be2 Bd6 12.c4 b6 (12...c6 13.d4 Qc7 14.g3+=) 13.h3 0–0 14.Nc3 Bc5 (better is 14...Be5!?=) 15.Qc2+/– a6 16.Ne4 Ne4 17.Qe4 ab5? (17...Qd2 18.Bd3 g6 19.Rfd1+=) 18.ab5 (18.d4 Bd6 19.Bd3 g6 0.ab5 Re8+–) 18...Qf6? (better is 18...Qd2!? 19.Bf3 Rbd8+/–) 19.d4+– Bd6 20.Bd3 g6 21.f4 Rfe8 22.Qf3 Rbd8 23.Ra2 Bb4 24.g4 Qh4 25.Kg2 Rd6 26.g5 Ba5 27.Qg3 Qg3 28.Kg3 c5 29.d5?? (better is 29.bc6 Rc6 30.c5+–) 29...ed5= 30.cd5 Re3 31.Rf3 Rf3 32.Kf3 Rd5 33.Be4 Rd4 34.Re2 Kg7 35.h4 Rd2 (35...Rd2 36.f5 gf5 37.Bf5 Re2 38.Ke2 h5+=). revrevrevrev – manteauxblancs, Live Game Caissa's Web, 2004.

4.f4 Nd7 5.Bb2 b6 (5...e5 6.Nf3=) 6.Nf3+= h6 (6...a6 7.Nc3+=) 7.Be2 (7.Nd4 Nc5+–) 7...Bb7+= 8.c4 (8.0–0 e6+=) 8...Rb8 (8...a6 9.0–0+=) 9.a4 (9.Nc3 Ngf6+–) 9...a6 (9...e6 10.0–0+–) 10.Nc3 (10.0–0 e6+–) 10...a5 (10...Ngf6 11.0–0+–) 11.0–0 (11.f5 Ngf6+–) 11...Bf3 (11...Ngf6 12.f5+–) 12.Bf3 (12.Rf3 Ngf6+–) 12...Nc5 (12...e6!?+–) 13.Bc6+– Nd7 14.Nd5 (14.f5 Ngf6+–) 14...Ngf6 (14...e6!? 15.Nc3 Ne7+–) 15.Qf3 (better 15.Bf6 gf6 16.f5+–) 15...g5?? (15...Nh7 16.f5+–) 16.e4 (better 16.Bf6 ef6 17.Qe4 Qe7 18.Ne7 Be7 19.fg5 hg5 20.Rf6+–) 16...Bg7 17.e5 (17.Nf6 ef6 18.fg5 hg5+–) 17...Nd5 18.cd5 (18.fg5 0–0 19.gh6 Bh6 20.Qg4 Kh7 21.Bd5 Ne5 22.Be4 f5 23.Rf5 Kh8 24.Re5 Rf6+–) 18...0–0 19.fg5 (19.d4!? e6+–) 19...Ne5+– 20.Be5 (20.Qh5 hg5 21.Qg5 Ng6+–) 20...Be5 21.gh6 (21.Ra3 Bd4 22.Kh1+–) 21...f5? (better 21...Bd4 22.Kh1 Ba1 23.Ra1 Kh8+=) 22.Rae1+– Bd4 (22...Rf7 23.Qe3+–) 23.Kh1 e5 (23...Kh7+–) 24.Qg3 Kh7 (24...Qg5 25.Qg5 Kh7 26.Qg7) 25.Qg7 1–0. GuestVGMK – iwasnotsanta, freechess.org, 2017.

4.f4 Ng6 5.d4=.

3.e3 e6

4.Bb2 Qf6 5.d4 Ng6 6.Nf3 e5? (better 6...Nh4!?+=) 7.de5+– Qe6 8.Bd3 Bb4 9.Nbd2 Bd2 (9...f6 10.ef6 Nf6 11.0–0+–) 10.Qd2 (10.Nd2?! Ne5 11.0–0 d6+=) 10...Nh6 (10...N8e7 11.Qa5 Qg4 12.0–0+–) 11.Qc3 0–0 (11...c6 12.0–0+–) 12.Qc7 Qg4 (12...Re8 13.0–0+–) 13.0–0 Ne7 (13...Re8+–) 14.Ba3 Nd5 (14...Nhf5 15.Bf5 Qf5 16.Be7+–) 15.Qd6 Qe6 (15...Re8 16.Qd5 Qh5+–) 16.Qf8 1–0. DEFFM – GuestGMQC, freechess.org, 2020.

4.Bb2 Qf6 5.f4 (better is 5.Bd4 Qf5 6.f4+=) 5...d6?? (better is 5...Nd3! 6.Bd3 Qb2=) 6.fe5+– de5 7.Nf3 e4 (7...Bd6+–) 8.Bf6 Bc5 (8...Nf6 9.Ne5 Bd6+–) 9.Bg7 (9.Bg7 Ne7 10.Bh8 ef3 11.Qf3+–) 1–0. Fournier,Frederic – andy2000, Active, 2005.

4.Bb2 Qg5?? 5.f4+– Qf5 (5...Nd3 6.Bd3 Qg2 7.Qf3 Qf3 8.Nf3+–) 6.Be5 f6 (6...Qg6 7.Nf3 Nf6+–) 7.Bd3 Qe5 (7...fe5 8.Bf5 ef5 9.fe5+–) 8.fe5 1–0. DEFFM – GuestWVZW, freechess.org, 2019.

4.c4 Bc5 (better 4...d5!? 5.cd5 ed5=) 5.Bb2+– Qf6 (5...f6 6.Be5 fe5 7.Qh5 g6 8.Qe5+–) 6.d4 (better 6.Bc3!? Nh6 7.d4+–) 6...Ng6+= 7.Nd2 (worse 7.dc5 Qb2 8.Nd2 Qb4=+) 7...Bb4 8.Ngf3 Ba5 9.Bd3 a6 10.0–0 Bb6 (10...ab5 11.cb5 Nh4 12.Nh4 Qh4 13.Qa4+–) 11.a4 a5 (11...Ba5!?+–) 12.c5 White gets in control 12...Ba7 13.Nc4 Qe7 14.b6 cb6 15.cb6 Bb8 16.Ba3 d6 17.Nfe5 (17.Qd2 Nf6+–) 17...Nf6 18.Rc1 0–0 (18...Qd8 19.Ng6 hg6 20.f4+–) 19.Bg6 (19.Ng6!? fg6 20.e4+–) 19...fg6+– 20.Qb3 Nd7 21.Rfd1 Ne5? (better 21...Nf6+–) 22.de5+– d5?? (22...Qf7 23.Rd2 d5 24.Bf8 Qf8+–) 23.Be7 dc4 24.Qc4 Re8 25.Qc8! Ba7 (25...Rc8 26.Rc8) 26.Qe6 (26.Qd7 Rab8 27.Bf8 Re7 28.Qe7 Rf8 29.Rd7 Rf7 30.Qf7 Kh8 31.Qg7) 26...Kh8+– 27.ba7 Ra7 (27...b5 28.Qf7 Rf8 29.Bf8 Rf8 30.Qf8) 28.Rd7 (28.Bf6 Raa8 29.Bg7 Kg7 30.Rc7 Kh6 31.Qh3 Kg5 32.f4) 28...Raa8 (28...Ra6 29.Qf7 Rg8 30.Bf8 h5 31.Bg7 Kh7 32.Bf6 Rg7 33.Qg7) 29.Rcc7 (29.Qf7 Rg8 30.Bf6 h5 31.Qg6 gf6 32.Qh5) 29...Rac8 (29...b6 30.Qf7 Rf8 31.Bf8 Rf8 32.Qf8) 30.h4 (30.h4 Rg8 31.Bf6 h5 32.Bg7 Kh7 33.Bf8 Rg7 34.Rg7 Kh6 35.Qg6; 30.Bf6 h5 31.Rg7 Re6 32.Rc8 Re8 33.Re8) 1–0. BeepBeepImAJeep (2540) – abuturab (1735), lichess.org, 2016.

4.f4 Ng6 5.Nf3 Nf6 6.Be2 b6 7.0–0 Be7 8.c4 Bb7 9.Nc3 0–0 10.Nd4 c5 11.bc6 dc6 12.Qc2 c5 13.Nf3 Bd6 14.Bb2 a6 15.Rad1 Qc7 16.d3 Rfe8 17.Ne1 Rad8 18.Bf3 Bf3 19.Nf3 e5 20.f5 Ne7 21.e4 Nc6 22.Bc1 Rb8 23.Bg5 Nd4 24.Qf2 Nd7 (24...Be7!?=) 25.Nd5+= Qb7 26.f6 g6 27.Qh4 Ne6 28.Be3 Bf8 0–1. Sixty4 (1715) – Stevetilbury, playchess.de, 2006.

4.f4 Ng6 5.Nf3 Qh4?? 6.Nh4+– Nh4 7.g3 f5 (7...Ng6 8.Nc3+–) 8.gh4 g6 9.Bb2 e5 10.Be5 b6 11.Bg2 Rb8 12.Bh8 Nh6 13.h5 gh5 14.Qh5 Nf7 15.Bd5 d6 (15...Bg7 16.Qf7 Kd8 17.Bg7 c5 18.Be5 d6 19.Bf6) 16.Qf7 Kd8 17.Bf6 (17.Bf6 Be7 18.Qe7) 1–0. DEFFM – GuestXJVC, freechess.org, 2019.

3.e3 Nf6

4.Bb2 Ng6 5.a4 e5=+ 6.c4 d5 7.Nf3 e4 8.Nd4 Be7 (8...Ne5 9.cd5 Nd5 10.Nc6 Nc6 11.bc6=) 9.cd5= Nd5 10.Nc3 Nc3 11.Bc3 0–0 12.Be2 Ne5 13.0–0 Nd3 (13...Qd6!?=) 14.Bd3 ed3 15.Qb3 Bf6 16.Bb2 Qd6? (16...a6 17.Qd3 Re8 18.Rfc1+=) 17.Qd3 (17.Ba3!? Be6 18.Qd3 Qd7 19.Bf8 Rf8+–) 17...c5 (17...Rd8 18.Rfc1+–) 18.bc6+– bc6 19.Qc4 (19.Ba3 c5 20.Rfc1 Bd4 21.ed4 Re8 22.Bc5 Qd5+–) 19...c5 (19...Re8!?+–) 20.Nb5+– Qe7 21.Bf6 gf6 22.Rac1 Kh8? (better 22...Rd8+–) 23.Qc5 Qb7 (23...Qc5 24.Rc5 a6 25.Nc7+–) 24.Nd6 (24.Qf8) 24...Qb8 (24...Qa6 25.Qd4 Kg7 26.Rc7+–) 25.Ne4 (better 25.Rb1 Be6 26.Rb8 Rfb8 27.d4+–) 25...Be6 (25...Ba6 26.Rfe1 Qe5+–) 26.Nf6 Qd8 (26...Qb2 27.d4 h6 28.Nh5+–) 27.Qe5 Qb8 (27...Rb8 28.Nh5 f6 29.Qe6 Rb6+–) 28.Qh5 (28.Qh5 Kg7 29.Qg5 Kh8 30.Nh5 Qb2 31.d4 Qd4 32.ed4 Rg8 33.Qf6 Rg7 34.Qg7) 1–0. RichardSommer (2095) – kgokulraj4 (2020), lichess.org, 2020.

4.Bb2 Ng6 5.c4 e6 6.a4 Be7 7.Nf3 0–0 8.Be2 a6 9.0–0 ab5 10.ab5 Ra1 11.Ba1 d5 12.d4 dc4 13.Bc4 Ne4 14.Nbd2 Nd2 15.Qd2 c6 16.Bd3 (16.bc6!? bc6 17.Rc1+=) 16...cb5= 17.Bb5 Qd5 18.Qb2 Bd7 19.Be2 Bc6 20.Rc1 Bd6?? (better 20...Ra8 21.Qb1 Nh4 22.Nh4 Bh4=) 21.Bc4+– Qf5 (21...Bh2 22.Kh1 Qf5 23.Nh2 Bd5+–) 22.Qb1?? (better 22.d5 e5 23.dc6 bc6 24.Qb7+–) 22...Bf3 (22...Qb1!? 23.Rb1 Ra8=+) 23.Qf5+= ef5 24.gf3 Nh4 25.Be2 Ra8 26.f4 Kf8 27.Kf1 Ke8 28.Bc3 Kd7 29.Rb1 Ra3 30.Be1 (worse 30.Rb7 Kc6 31.Rf7 Rc3=+) 30...Ra7 31.Bb5 Kc8 32.Bd3 g6 33.Ke2 Ra2 34.Bd2 Nf3 35.Kf3 Rd2 36.h4?? (better 36.Bc4+–) 36...Rd3–+ 37.h5 Rc3 (37...gh5?! 38.Rb5–+) 38.hg6 (38.Rb6 Be7–+) 38...hg6 (38...fg6 39.Rb6 Kc7 40.Rb1–+) 39.Rh1 (39.Rb5 Kc7–+) 39...b5 40.Rh7 (40.Rb1 b4–+) 40...b4 41.Rf7 (41.Rh8 Kb7 42.Rh1–+) 41...b3 42.Rf6 b2 43.Rd6 b1Q 44.Rg6 (44.Kg2 Qe4 45.f3 Qe3 46.Rc6 Rc6 47.Kh3 Qf3 48.Kh2 Rc2 49.Kg1 Qg2) 44...Qe4 (44...Qh1 45.Kg3 Qg1 46.Kf3 Qg6 47.Ke2 Rc2 48.Kf1 Qg4 49.f3 Qf3 50.Ke1 Qe2) 45.Kg3–+ Rc1 46.Rg8 Kd7 47.Rg7 (47.f3 Qe3 48.Rg7 Kd6 49.Rd7 Kd7 50.Kh4 Qf4 51.Kh5 Rg1 52.d5 Qg5) 47...Ke6 (47...Ke8 48.Rb7 Rg1 49.Kh4 Qh1) 48.Kh2 (48.d5 Kd5 49.f3 Qe3 50.Rd7 Ke6 51.Rd6 Kd6 52.Kh4 Qf4 53.Kh5 Qg3 54.f4 Rh1) 48...Rh1 (48...Qh1 49.Kg3 Rg1) 49.Kg3 Rg1 50.Kh4 Rg7 (50...Qh1) 51.Kh5 (51.f3 Qf3 52.d5 Kd7 53.e4 Qg4) 51…Qh1 0–1. BeepBeepImAJeep (2685) – Beginnerforever12 (2475), lichess.org, 2019.

4.Bb2 Ng6 5.Nf3 d5 6.c4 Bg4 7.h3 Bf5 8.Nd4 Qd7 (8...Bc8 9.cd5 Qd5 10.Nf3=) 9.Nf5 Qf5 10.Be2 e6 11.0–0 Ne4 (11...dc4 12.Bc4 Bd6 13.d4=) 12.d3 Nd6 13.Bg4 Qg5 14.f4 Qh4 15.f5 (better 15.cd5 ed5 16.Nc3+–) 15...ef5=+ 16.Bf5 Nf5 17.Rf5 dc4 18.Qf3 (18.Nc3 Qe7 19.Nd5 Qd7–/+) 18...Qe7 (better 18...Qe1 19.Kh2 Bd6 20.g3 cd3 21.Bg7 Rg8–+) 19.dc4 0–0–0 (better 19...c6 20.Rh5 Qe6 21.bc6 bc6=) 20.Bd4?? (better 20.Rf7 Qh4 21.Nc3 (21.Bg7?! Bg7 22.Rg7 Qe1 23.Kh2 Rd1=) 21...Qc4 22.Rf1+=) 20...Nh4–+ 21.Qg4 Nf5 22.Qf5 Kb8 23.Nc3? (23.Nd2–+) 23...Qe6 (better 23...Rd4 24.ed4 Qe3 25.Kh1 Qc3–+) 24.Qg5 (better 24.Qe6!? fe6 25.Ne4–/+) 24…Be7 (24...Be7 25.Qg7 Rdg8–/+) 0–1. GuestXCSC – GuestGNLS, freechess.org, 2017.

4.d4 Ng6 5.Bb2 d5 6.c4 e6 7.Nf3 c5 (7...Ne4 8.Bd3=) 8.Nbd2 (8.cd5 ed5 9.dc5 Bc5+=) 8...b6 (8...cd4 9.Bd4 Be7 10.cd5 Qd5 11.h4+=) 9.Bd3 Bd6 10.0–0 Bb7 11.dc5 Bc5 12.Rc1 0–0 13.Nb3 Bd6 (13...a6 14.cd5 Bd5 15.Nc5 bc5 16.ba6 Bf3 17.gf3+=) 14.c5 bc5 15.Nc5 Bc5 16.Rc5 Qe7 (16...a6 17.Qb3+=) 17.Rc3 (17.Qc2 Rfc8 18.Rc8 Rc8+–) 17...Rac8 (17...Ne4 18.Rb3+=) 18.Ba3 (18.Bg6 fg6 19.Ba3 Qd7+–) 18...Rc3 (18...Qd7!? 19.Bc5 Rfd8+=) 19.Be7+– Ne7 20.Qa4 Rd3 (20...Ra8 21.Qd4 Rcc8 22.Rd1+–) 21.Qa7 Ng6 (21...Re8 22.Qb7 Ra3 23.Ra1+–) 22.Qb7 Ra3 23.Ra1 Rfa8 (better 23...Raa8 24.b6 Rfb8+–) 24.b6 Ra2 (24...e5 25.Qc6 R8a6+–) 25.Qa8 Ra8 26.Ra8 Nf8 27.Ne5 (27.Ne5 g5 28.b7+–) 1–0. GuestFQXG – GuestPMDY, freechess.org, 2019.

4.d4 Ng6 5.Nf3 a6 6.ba6 b6 7.Ba3=.

4.d4 Ng6 5.Nf3 d5=.

4.d4 Ng6 5.Nf3 Ne4 6.Bd3 Nh4?? (better 6...d5+=) 7.Nh4+– (worse 7.Be4 Ng2 8.Kd2 d5+–) 7...Nf6 (7...e6 8.Nf3 Bb4 9.Bd2 Nd2 10.Nbd2+–) 8.0–0 Ng4 (8...d5+–) 9.Qg4 b6 (9...d5 10.Qg3+–) 10.Nf5 (better 10.Nc3 Bb7+–) 10...Bb7 (10...g6 11.Ng3+–) 11.Ng7 Bg7 12.Qg7 Rf8 13.Bh7 (13.e4 e6+–) 13...e6 14.e4 Ke7 15.Bg5 Kd6 16.Qe5 1–0. DEFFM – guestffff, freechess.org, 2019.

3.e3 g6??

4.Bb2?? f6 +=.

4.Bb2?? Bg7? 5.c4?? (better is 5.d4+–) 5...d6?? (better is 5...Nd3! 6.Bd3 Bb2–/+) 6.d4+= Nd7 7.Nf3 Ngf6 8.Nbd2 0–0 9.Bd3 e5 10.de5 de5 11.Qc2 (worse is 11.Be5 Ne5 12.Ne5 Ne8–+) 11...Re8 12.Ne4 Ne4 13.Be4 Nc5 14.Bd5 Qe7 15.Rd1 Bg4 (15...a6 16.e4=) 16.0–0 (better is 16.Ba3!? Rab8 17.h3 Bf3 18.Bf3+=) 16...e4+= 17.Bg7 Kg7 (17...ef3 18.Bb2 (worse is 18.gf3 Bh3 19.Bh6 Qf6+=) 18...fg2 19.Qc3 gf1R 20.Rf1+/–) 18.Qc3= Qf6 19.Qf6 Kf6 20.Nd2?? (better is 20.h3 Be6 21.Be6 Ne6 22.Nd2=) 20...Bd1–+ 21.Rd1 Nd3?? (better is 21...Rac8 22.f3 ef3 23.gf3 Re3 24.Ne4 Ne4 25.Be4 c6–+) 22.Ne4+/– Kg7? (better is 22...Re4 23.Be4 Nc5+/–) 23.Rd3+– f5 (23...Reb8 24.Nc5 c6 25.Bf3+– (25.bc6?! bc6 26.Bf3 Rb1 27.Rd1 Rab8+–)) 24.Ng3 (24.Nc5!? c6 25.bc6 bc6 26.Bc6 Rab8 27.Rd7 Kh6+–) 24...Red8 25.c5 (25.Ra3!? Rdb8+–) 25...c6 26.bc6 bc6 27.Bc6 Rd3 28.Ba8 Ra3 29.c6 Ra2 30.h3 (30.Kf1 a5 31.Bb7 Rc2+–) 30...Rc2 (30...a5 31.Bb7 Rc2 32.Ne2 Re2 33.c7 Re1 34.Kh2+–) 31.Kh2 (31.Kf1 a5 32.Ne2 a4+/–) 31...a5 (31...Rf2 32.Bb7 Rc2 33.Ne2 Re2 34.c7+–) 32.Nf1 (better is 32.Bb7+–) 32...a4 33.Nd2 (better is 33.c7=) 33...Rd2–+ 34.c7 Rc2 35.Bb7 (35.Kg3 Rc7 36.Bd5 Kf6–+) 35...Rc7 36.Bd5 Rc5 37.Ba2 Rc2 38.Bd5 (38.Be6 Rf2 39.Kg3 Rd2–+) 38...Rf2 39.Kg3 Rd2 40.Bc4 a3 41.Kf3 a2 42.Ba2 Ra2 43.g4 fg4 44.hg4 Ra3 45.Kf4 Kf6 46.g5 Ke6 47.e4 Ra4 48.Kf3 Ke5 (48...Ke5 49.Ke2 Re4 50.Kf3 Kf5–+) 0–1. Fournier,Frederic (1615) – cgl (1605), Active, 2006.

4.d4 Ng4 5.Qg4 h5 (5...Nf6 6.Qd1+–) 6.Qd1 d5 (6...Nf6 7.Nf3+–) 7.Bd3 (7.c4 Nf6+–) 7...Nf6 (7...Bf5 8.Nf3+–) 8.Nf3 Bg4 (8...Bf5 9.0–0+–) 9.h3 (9.c4 dc4 10.Bc4 e6+–) 9...Bf3 (9...Bf5 10.0–0+–) 10.Qf3 (worse 10.gf3 e6+–) 10...Bg7 (10...Qd6 11.Ba3 Qe6 12.c4+–) 11.c4 dc4 (11...e5 12.de5 Nd7 13.e6+– (13.Qd5?! Be5 14.Qb7 Rb8 15.Qa7 Ra8+–; 13.cd5 Ne5 14.Qd1 Nd3 15.Qd3 Ba1=)) 12.Bc4 0–0 (12...Rb8 13.Ba3+–) 13.Qb7 Qd6 (13...a6 14.Qc6+–) 14.Ba3 Qe6 (14...Qd7+–) 15.Be6 (15.Be6 fe6 16.Be7+–) 1–0. DEFFM – GuestKNJH, freechess.org, 2018.

4.d4 Bg7 5.Bb2 Nc6 6.bc6 dc6 +–.

4.d4+– Bg7 5.Bb2 d6 6.de5 a5 (6...Nh6 7.h3+–) 7.Nf3 Bg4 8.h3 Bf3 9.Qf3 (9.gf3?! Be5 10.Be5 de5 11.Qd8 Rd8+–) 9...de5 (9...Rb8 10.e6! Nf6 11.ef7 Kf7 12.e4+–) 10.Qb7 Rb8 11.Qa6 Qd7 12.Nc3 e4 (12...Nf6 13.Rd1 Qc8 14.Qc6 Kf8 15.Na4+–) 13.Rd1 Bc3 (13...Qc8+–) 14.Bc3 Qe6 15.Bh8 Qa6 (15...Qb6 16.Bc3+–) 16.ba6 e6 17.Bb5! Ke7 (17...Rb5 18.a7 Passed pawn) 18.Rd7 Kf8 19.0–0 (19.Bc6!? Ne7 20.Bb7 Ke8+–) 19...Ne7 20.a7 Ra8 21.Rc7 Nc8 22.Bc6 Ra7 23.Rc8 Ke7 24.Bd4 (24.Rd1 f6 25.Rg8 e5 26.Re8 Kf7 27.Rd6 Rd7 28.Bd7 h6 29.Rf6) 24...Ra6 25.Bb5 a4 26.Be5 Rb6 (26...Ra8 27.Ra8 f6 28.Ra7 Kf8 29.Rd1 fe5 30.Rd8) 27.Re8 1–0. marekt – tacticed, internet, 2014.

3.e3 Ng6

4.Bb2 a6 5.c4 ab5= 6.cb5 Nf6 7.a4 e6 8.Nf3 Be7 9.Be2 0–0 10.0–0 d5 11.d4 c5 12.Nc3 Ne4 (12...c4 13.Qc2=) 13.Ne4 de4 14.Nd2 cd4 15.Bd4 e5 16.Bb2 f5 17.Bc4 Kh8 18.Nb3 White prepares the advance a5 18...Qe8 19.a5 f4 (19...Bb4 20.Ra4 Qe7 21.Qh5+=) 20.a6 (20.Qd5!?+–) 20...ba6 (20...Nh4 21.Qc2 Qg6 22.f3–/+) 21.ba6 (21.Qd5 Bd7 22.ba6 Bc6=) 21...f3 22.g3 (better 22.Qd5 fg2 A) 23.Qa8? A1) 23...gf1N?! 24.a7 Qd7 25.Qe4=+ (25.Rf1 Qg4 26.Kh1 Nh4 27.Qe4 Qe4 28.f3 Rf3 29.Kg1 Qg6 30.Kh1 Qg2; 25.Bf1? Bb7 26.Qb8 Bd6–+; 25.Kf1 Qh3 26.Ke1 Qh2 27.Qc8 Qf2 28.Kd1 Rc8–+); A2) 23...gf1B?! 24.Bf1 Qf7 25.Qe4–+; A3) 23...gf1R 24.Bf1 Qf7 25.Qe4 Be6–+; B) 23.Kg2 Bg4 24.Kg1 Nh4–+; C) 23.Rfc1=) 22...Nh4?? (better 22...Ba6 23.Ra6 Qc8–+) 23.Re1 (23.Qd5!? Bh3 24.Qe5 Nf5+–) 23...Qh5 (23...Bb4 24.Ba3 (24.gh4?? Qg6 25.Kh1 Qg2) 24...Ba3 25.Ra3=) 24.Bf1 (24.Qd5 Bf5 25.Be5 Ng6+–) 24...Ng2 (24...Ng6!?=) 25.Bg2+= Bh3? (better 25...Rd8 26.Nd2 Bb4+=) 26.Bh1+– Rf6?? (26...Bb4 27.Nd2 Rfd8+–) 27.Qd5 Raf8 (27...Ra7 28.Be5 Rh6 29.Qd4 Rha6 30.Ra6 Ra6 31.Qe4+–) 28.Qe4 Rh6 (28...Bf5 29.Qe5 Bd6 30.Qd4+–) 29.Bf3! Rf3 (29...Qf3 30.Qf3) 30.a7 Bc8 (30...Rf8 31.a8Q Bg4 32.h4+–) 31.Qf3! Qf3 32.a8Q Theme: Double Attack. 32...Qg4 (32...Qf8 33.Be5 Qg8 34.Ra7+–) 33.Rac1 (33.Rac1 Kg8 34.Qc8 Qc8 35.Rc8 Kf7 36.Be5+–) 1–0. BeepBeepImAJeep (2660) – SunshineBand (2385), lichess.org, 2016.

4.Bb2 d5 5.a4 c6 (5...e5 6.Nf3 Bd6 7.Be2=+) 6.c4 e6 7.Nf3 Nf6 8.Be2 Be7 9.0–0 0–0 10.d4 Re8 11.Nc3 Nf8 12.Ne5 N6d7 13.bc6 Ne5 14.de5 (14.cb7 Bb7 15.de5 Qb6+=) 14...bc6= 15.cd5 cd5 (15...ed5 16.Qc2=) 16.Nb5 a6 17.Nd4 Bc5 18.Rc1 Qb6 19.Ba1 Bd7 20.a5 Qa7 (20...Qa5? 21.Nb3 Ba4 22.Na5 (22.Rc5?! Qc5 23.Nc5 Bd1 24.Rd1 a5+–) 22...Bd1 23.Rfd1+–) 21.Nb3 Be7 22.Bd4 Qb8 23.Bb6 (23.Bd3 Bb5=) 23...Rc8 (23...Qe5 24.f4 Qf6 25.Bd4=+) 24.Nc5 Attacking the isolated pawn on a6 24...Bb5 25.Bb5 ab5 26.Nb3 (26.Qd4!?=) 26...Nd7 27.Rc8 Qc8 28.Bd4 Bb4 The isolani on a5 becomes a target 29.Qb1 (29.Qe2!? Qb8 30.f4=) 29...Ba5–/+ 30.Rc1 Qb7 31.Na5 Ra5 32.Qb4 Ra8 33.g4 h6 34.h3 Qb8 35.Rb1? Attacks the isolani on b5 (better 35.Qe7 Qd8 36.Qd8 Rd8 37.Rc7=) 35...Ne5–+ 36.Qb5 (36.Be5 Qe5 37.Qb5 Qf6–+) 36...Qb5 37.Rb5 Nf3 38.Kg2 Nd4 39.ed4 Ra4 40.Rb8 Kh7 41.Rb7 Kg6 (41...Rd4?! 42.Rf7 Kg6 43.Ra7–+) 42.Kg3 Rd4 43.h4 h5 (43...Rd3 44.f3–+) 44.f3 (better 44.gh5 Kf6 45.Rb8–+) 44...hg4 45.fg4 Rd3 46.Kf4 White intends g5 (46.Kf2 e5–+) 46...Kf6 (better 46...f6 47.h5 Kh6–+) 47.g5 Kg6 48.Kg4 Rd4 49.Kg3 Kf5 (better 49...Re4–+) 50.Rf7 Kg6 51.Re7 Rd3?? (better 51...Re4–+) 52.Kg4= Rd4 53.Kg3 Kf5?? (better 53...Re4–+) 54.Rf7 Kg6 55.Re7 ½–½. BeepBeepImAJeep (2470) – LIEME06 (2090), lichess.org, 2019.

4.Bb2 d5 5.Nf3 Nf6 6.Be2 e6 7.0–0 Bd6 8.d4 (8.c4 0–0=) 8...0–0 (8...a6 9.ba6 ba6 10.c4=) 9.c4 dc4 10.Bc4 (10.Nbd2 Bd7 11.a4 c3 12.Bc3 Rc8+=) 10...a6 11.ba6 ba6 12.Qc2 Rb8 (12...Bb7 13.Nbd2=) 13.Nbd2 Bb7 14.Rab1 Qd7 (14...Nd5 15.a3+=) 15.Rfc1 (15.e4 Bf4+=) 15...Rfd8 16.e4 Bf4 17.g3 (17.Bc3 Ng4+=) 17...Bd2= 18.Nd2 e5 19.d5 c6 20.dc6 Qc6 Now all is on e4 (20...Bc6 21.Bc3 Bb5 22.a3=) 21.f3 Qc5 22.Kg2 Qe3 (better is 22...Qd6 23.Bc3 Rd7=) 23.Nb3 (better is 23.Bc3!?=) 23...Ne4!–/+ 24.Re1 (24.Qe4 Be4) 24...Rd2! 25.Qd2 (25.Nd2 Theme: Interference 25...Qf2 Theme: Double Attack) 25...Qd2 (25...Nd2?! 26.Re3 Nc4 27.Re2+=) 26.Nd2 Nd2 27.Bb3 Bf3 (27...Nf3 28.Kf2 Ne1 29.Re1–+) 28.Kg1 (28.Kf2 Nb1 29.Rb1 Bc6–+) 28...Nb1 (28...Nb3?! 29.Be5 Ne5 30.Re5+=) 29.Rb1 Rb5 (29...h6 30.Kf2 Bg4 31.Bc3–+) 30.h4 (better is 30.Rf1!? e4 31.Rc1–/+) 30...h5 31.Ba1 (31.Bc2 e4–+) 31...Rc5 (31...Bd5 32.Bc2 Rb1 33.Bb1–+) 32.a4 (32.a3 Rb5–+) 32...Bd5 33.Bd1 Be4 34.Rb8 Kh7 35.Bb2 Bc6 (35...Kh6 36.Rb6 Bd3 37.Ba3–/+) 36.Bh5 Ba4 37.Rb6 a5 (37...Rc6 38.Rc6 Bc6 39.Bg6 Kg6 40.Be5–/+) 38.Bg6 fg6 39.Re6 Bb3 40.Re7 g5 41.hg5 (41.Be5 Bf7–/+) 41...Kg6 42.Be5 Bf7 43.Bf4 Rc2 (43...a4 44.Ra7 Be8 45.Kf2–/+) 44.Ra7 Ra2 45.Ra6 (45.g4 Ra4 46.Ra6 Kh7+=) 45...Kf5 46.Ra7 Ke6 47.Ra6 Kd5 48.Rd6 (48.g6 Be8–/+) 48...Ke4 (48...Kc4 49.g6 Bd5 50.Rd7–/+) 49.Rd7 Bd5 (49...Be6 50.Rg7 a4 51.Re7+=) 50.g6 a4 51.Rg7 The passed pawn on g6 will quickly become a dangerous weapon 51...a3 (51...Kf5 52.Rd7 Bc4 53.g7=) 52.Re7 Kf3 (52...Kd4 53.Be5 Kc4 54.g7=) 53.Re3= Kg4 54.g7 (54.Kf1 Ra1 55.Ke2 a2=) 54...Rg2+= Exerts pressure on the isolated pawn 55.Kf1 a2 The mate threat is a1Q 56.Be5 Rh2 57.Rd3 Bf7 58.Ra3 (58.Ke1 Kf5 59.Re3 Ke6+=) 58...Kf5 (58...Bc4 59.Kg1 Rd2 60.Ra4 Rd1 61.Kf2 Rd2 62.Ke3 Re2 63.Kd4+–) 59.Bc3 (59.Re3 Ke6+=) 59...Rc2 (59...Ke4 60.Ke1–/+) 60.Ra5 Kg6 61.Bd4 Rd2 62.Be5 (62.Bc3!? Rd3 63.Bb2+=) 62...Bc4–/+ 63.Kg1 Re2 64.Bd4 Re4 65.Bc3 Re3 66.Bd4 Rg3 (66...Rd3 67.Be5+=) 67.Kf2= Rd3 68.Ba1 Rd1 69.Bc3 Rd3 (69...Rd8 70.Rc5 Bg8 71.Ke3=) 70.Be5 (70.Ba1 Bg8=) 70...Rh3 71.Ra4 Bf7 (71...Bg8 72.Ra8 Bf7 73.Ke2=) 72.Ra8 (72.Ke2 Kf5 73.Ba1 Rh2 74.Kd3 Rh1 75.Ra5 Kg6=) 72...Kf5 73.Ba1 Rh1 74.Ra7 (74.Ra5 Kg6 75.Bd4 Rh3=) 74...Bg8+= 75.Ra5 Kg6 76.Bd4 Rd1 (76...Rh3 77.Ba1=) 77.Ke3 Re1 78.Kd3 (78.Kd2 Re7=) 78...Rd1 (78...Rh1 79.Ra6 Kh7 80.Kc2=) 79.Ke3 Re1 (79...Be6 80.Bc3=) 80.Kd3 (80.Kd2 Re4 81.Ba1 Rf4=) 80...Rd1 (80...Re7 81.Kc3=) 81.Ke3 Re1 (81...Bc4 82.Ke4=) ½–½. Bonetti,Shane – SuperSolid (2635), ICC, 2002.

4.Bb2 d6 5.c4 e5 6.a4 Nf6 7.Nc3 Be7 8.Nf3 Bg4 9.Be2 Bf3 (9...0–0!?=) 10.Bf3+= (worse 10.gf3 Qd7=) 10...e4? (better 10...Qc8+=) 11.Ne4+– Ne4 (11...Rb8 12.Nf6 Bf6 13.d4+–) 12.Be4 Rb8 13.0–0 (13.Bg7!? Rg8 14.Bc3 Bf6+–) 13...0–0 14.d4 Bf6 15.Qc2 c6 16.Rac1 d5 17.cd5 cd5 18.Bf3 Rc8? (better 18...Nh4 19.Be2 Qd7+–) 19.Qc8 Qc8 20.Rc8 Rc8 21.Bd5 Rc2 22.Ba3 Rc3 23.Bc5 Rc2 (23...b6 24.Bd6 Be7+–) 24.Ba7 Ne7 25.Bb7 Ra2 (25...Rc7 26.Be4 Ra7+–) 26.Bc5 Ra4 27.b6 Ra5 28.Be4 Rb5 29.b7 g6 30.Bd6 (30.Rb1 Rc5 31.b8Q Rc8+–) 30...Rb6 (30...Rb7 31.Bb7 Nf5 32.Bc5+–) 31.b8Q (better 31.Rb1!? Rb7 32.Rb7 Kf8+–) 31...Rb8 32.Bb8 Kg7 33.Be5 (better 33.Rb1!? Ng8+–) 33...Be5 34.de5 Nc8 (34...f5 35.Bd3+–) 35.Rb1 Nb6 (35...Ne7+–) 36.Rb6 (36.Rb6 Kf8 37.Rb7+–) 1–0. BeepBeepImAJeep (2640) – guy_chaimy (1745), lichess.org, 2017.

4.Bb2 e6 5.Nf3 Nf6 6.d4 Be7 7.Bd3 0–0 8.0–0 Nd5 9.c4 Nf6 10.Nbd2 d5 11.Ne5 b6 (11...Bd7 12.Qf3+=) 12.Nc6+– Qd7 13.a4 Bb7? (better 13...Bd6!?+–) 14.Bg6+– fg6 15.Ne7 Qe7 16.Ba3 Qf7 (16...Qd7 17.Bf8 Rf8 18.Qe2+–) 17.Bf8 Rf8 18.Qc2 dc4 19.Nc4 Ng4 (19...Be4 20.Qc3+–) 20.f3 Nh6 21.Ne5 Qe7 22.Rac1 Rc8 23.e4 (23.Nc6 Bc6 24.Qc6 Nf7+–) 23...Qg5 (23...Nf7 24.Nf7 Qf7 25.Qd3+–) 24.Qa2 Qe7 25.Nc6 Bc6 (25...Qf6 26.Rfd1+–) 26.Rc6 (26.bc6?! Rd8 27.Rfd1 Nf7+–) 26...Kf7 27.d5 (27.f4 Rd8+–) 27...Kf8 (27...ed5 28.Qd5 Kf8 29.Rd1+–) 28.d6! Qd7 (28...cd6 29.Rc8 Pinning (29.Rc8 Deflection)) 29.Qc2 1–0. DEFFM – GuestTNHH, freechess.org, 2018.

4.Bb2 e6 5.Nf3 Nf6 6.Be2 Be7 7.c4 0–0 8.0–0 d5 9.d3 c6 10.Qc2 cb5 11.cb5 Bd7 12.a4 Rc8 13.Qb3 h6 14.Nbd2 Ng4 15.Nd4 Bf6?? 16.Bg4+– Bd4 17.Bd4 e5 18.Bd7 Qd7 19.Bb2 Qg4 20.Nf3 d4 21.ed4 ed4? 22.Bd4 Nf4= 23.g3?? Ne2–+ 24.Kg2 Nd4?? 25.Nd4 Qd4 26.Rac1 Rce8 27.Rc4 Qd7 28.Rf4 Re7 29.Rd1 Rfe8 30.d4 Kh7 31.Qb1 Kh8 32.Qb2 Re2 33.Qc3 Qd5 34.Kg1 Re1?? 35.Re1+– Re1 36.Qe1 g5 37.Re4 Kg7 38.Qe3 Qc4 39.d5 Qa2 40.d6 Qb1 41.Kg2 Qd1 42.Qd4 Qd4 43.Rd4 Kf8 44.d7 Ke7 45.d8Q Ke6 46.f4 gf4 47.gf4 h5 48.f5 Kf5 49.Kg3 h4 50.Kh3 Kg6 51.Qh4 f5 52.Rd6 Kf7 53.Qf6 Ke8 54.Qf5 Ke7 55.Qe5 Kf7 56.Rf6 Kg7 57.Qg5 Kh7 58.Rh6 1–0. ZZMeB4 (1690) – batak6 (1685), caissa.com, 2007.

4.Bb2 e5

5.c4 Bc5 (5...Nf6 6.Nc3=+) 6.Nf3= d6 7.d4 ed4 8.ed4 Bb4 9.Nc3 (9.Bc3 Bc3 10.Nc3 Nf4=) 9...Qe7 10.Qe2 Qe2 (10...Bg4 11.a3 Ba5 12.Qe7 N8e7 13.Nd2=+) 11.Be2 Nf4 12.g3 Ne2 13.Ke2 Nf6 14.a3 Ba5 15.Rhe1 0–0 16.Kf1 Bg4 17.Kg2 Rfe8 18.Nd2 (18.Re8 Re8 19.h3 Bf5=+) 18...h5 (18...d5 19.Rac1=+) 19.f3= Bf5 20.Kf2 (20.d5 Bd3=) 20...Bd3 (20...d5 21.Re8 Re8 22.c5–/+) 21.Re3= Re3 22.Ke3 Bf5 (22...Bc2 23.Rc1 Re8 24.Nde4 Bc3 25.Rc2 Bb2 26.Rb2 Ne4 27.fe4=+) 23.Nb3 Re8 24.Kd2 g5?? (better 24...Bc3 25.Bc3 d5=) 25.Na5+– 1–0. GuestCBJS – GuestXKMW, freechess.org, 2019.

5.c4 Bc5 6.Nf3 e4 7.Bg7+– ef3 8.Qf3 (8.Bh8?! fg2 9.Bg2 Nh8=) 8...f6?? (8...N8e7!? 9.Bh8 Nh8+–) 9.Nc3 (better 9.Bd3 d5 10.Bg6 hg6 11.Bh8 dc4 12.Qe4 Ne7 13.Bf6+–) 9...Qe7 10.Bh8 Nh8 11.Nd5 Qd8? (11...Qe5 12.Rd1 c6 13.d4 Bd4 14.Rd4 cd5 15.cd5+–) 12.a4 (12.Qg3 Kf8 13.Nc7 Rb8+–) 12...d6 (12...Kf7 13.d4 Bf8 14.Bd3+–) 13.Bd3 (13.Qe4 Kf8 14.Qh7 Nf7+–) 13...Ng6 14.Qh5 Qd7 (14...Be6+–) 15.Bg6 hg6 16.Qg6 The passed pawn on h2 will become decisive later 16...Qf7 (16...Kf8 17.d4 c6 18.Qg8 Kg8 19.Nf6 Kf7 20.Nd7 Bb4 21.Ke2 Bd7 22.h3+–) 17.Qf7 (better 17.Nc7 Ke7 18.Qf7 Kf7 19.Na8+–) 17...Kf7 18.Nc7 Rb8 19.Nd5 Be6 (19...Ne7 20.d4 Nd5 21.dc5+–) 20.0–0 (better 20.d4!? Bd5 21.dc5 Bc4 22.cd6 Rc8+–) 20...Bd5 21.cd5 b6? (21...f5+–) 22.d4 Bb4 23.Rfc1 Rb7 24.Rc6 Ne7 (24...Rd7 25.g4+–) 25.Rac1 (better 25.Rb1 Ba5 26.Rd6 Nf5+–) 25...Nd5 26.e4 Nf4 27.Rc7 Rc7 28.Rc7 Ke6 29.Ra7 (better 29.d5 Ke5 30.Re7 Kd4 31.f3+–) 29...Ba5?? (29...Ne2 30.Kf1 Nd4 31.Ra8+–) 30.g3 (better 30.d5 Ke5 31.Ra5 Ke4 32.Ra6 Nd5 33.a5 ba5 34.Rd6+–) 30...Ne2 31.Kg2 Nd4 32.Ra8 Nb3 33.h4 Nc5 34.h5 Ne4? (better 34...Kf7+–) 35.h6 Ng5 (35...Bc3 36.Re8 Kf7 37.Re4+–) 36.Ra7 (better 36.f4!? Nh7 37.Rh8 Kf7 38.Rh7 Kg8+–) 36...Bc3 (36...f5 37.f4 Nf7 38.h7+–) 37.h7 (better 37.f4 Nf7 38.f5 Kf5 39.Rf7 Kg6+–) 37...f5 (37...Nh7 38.Rh7 d5+–) 38.Rb7 (38.Rb7 Bd4 39.Rc7+–; 38.a5 Nh7 39.a6+–) 1–0. RichardSommer (2095) – SGanga (2190), lichess.org, 2020.

5.c4 d5 6.a4 (6.d4 Be6=) 6...d4 (6...Nf6!?=+) 7.ed4= ed4 8.d3 (better 8.Qe2!? Be7 9.Qe4=) 8...Bb4=+ 9.Nd2 Qe7 (9...Nf4 10.Qf3 Ne6 11.Ne2–/+) 10.Be2 Nf6 11.Ngf3 0–0 (better 11...Nf4!? 12.Kf1 Bg4 (worse 12...Ne2 13.Qe2 Bc3 14.Re1+=; worse 12...Qe2 13.Qe2 Ne2 14.Ke2+=) 13.Bd4 0–0–0=+ (worse 13...Ne2 14.Qe2 Qe2 15.Ke2+=)) 12.0–0+= Nf4 13.Nd4 Re8 14.Bf3 (14.Re1!?+=) 14...Nd3=+ Black gets strong play along the open d–file 15.Ba3? (better 15.Qc2 Nb2 16.Qb2=+) 15...Ba3–+ 16.Ra3 Qa3 Decoy theme: a3 17.Nb1 Qd6 18.Qd3 Rd8 19.Rd1 c5 (better 19...Ng4!? 20.g3 Ne5–+) 20.bc6=+ bc6 21.Bc6 Rb8 22.Bd5 (better 22.Nc3!?–/+) 22...Nd5–+ 23.Nb5 Qg6 (better 23...Qe5 24.cd5 Bf5–+) 24.cd5?? (24.Qg6 hg6 25.cd5–+) 24...Qd3–+ 25.Rd3 a6 (25...Bf5 26.Rd1 Bb1 27.Na7–+) 26.N5c3 Bf5 27.Rd1 Rb3 (27...Bb1 28.Nb1 Rd5 29.Re1–+) 28.d6 (28.f4 Kf8 29.d6 Ke8 30.Re1 Kd7–+) 28...Bb1 29.Nb1 Rd6!! Threatening mate... how? 30.Rc1 (30.Rd6 A deflection 30...Rb1 A classical mating theme) 30...Rc6 31.Re1 g6 32.Nd2 Rb4 33.a5 Kg7 34.Nf3 Rc5 35.h3 Ra5 36.Re7 Rf5 (better 36...Ra1 37.Kh2 Rb2–+) 37.Rb7 (37.Kf1–+) 37...Rf3 (better 37...Rb7 38.Kh2 a5–+) 38.Rb4 a5 39.Ra4 Rf5 40.g4 Re5 41.Kg2 Re6 (41...h6 42.h4–/+) 42.f4 (better 42.Ra5!? Re4 43.Kg3=) 42...Ra6–/+ 43.Kg3 Ra8 44.g5 Ra6 45.h4 Ra8 46.h5 (46.Kg4 f5 47.Kf3 Kf7–/+) 46...Ra6 (better 46...gh5!? 47.f5 f6–/+) 47.h6=+ Kf8 48.f5 (48.Kg4 Ke7=+) 48...gf5–/+ 49.Kf4 (49.Kf4 f6 50.gf6–/+). BeepBeepImAJeep (2585) – Gilevich (2425), lichess.org, 2017.

5.c4 Nf6 6.a4 b6 (6...Bb4 7.a5=+) 7.Nc3 Bb4 8.Nf3 0–0 9.Be2 d6 10.0–0 Bg4 11.d4 e4 12.Nd2 Bc3 13.Bc3 Be2 14.Qe2 Qd7 (14...a6 15.d5+=) 15.f3 White prepares the advance a5 15...Rfe8 16.a5 Rab8 17.ab6 ab6 18.Ra7 Ra8 19.Ra8 Ra8 20.fe4 Qe6 21.Qd3 Ng4 22.h3 Nh6 23.d5 Qe7 24.Nf3 f6 25.Ra1 Re8 26.Nd2 Ne5 27.Qe2 Nd7 28.Bd4 Nf7 29.Ra7 Nc5 30.Bc5 dc5 31.Qd3 Nd6 32.Kf2 Kf7 (32...Nc8 33.Ra8 Nd6+=) 33.Nf3 (33.e5 Qe5 34.Rc7 Kg8+–) 33...Rd8 (33...Kg8 34.Kf1=) 34.Kg1 (34.e5 fe5 35.Qh7 Nc4 36.Qh5 Kf8 37.Ng5 Qf6 38.Ke2+–) 34...Ne4+= 35.d6?? (better 35.Nd2 Nd6 36.e4=) 35...Nd6–/+ Black is in command 36.Qd5 (36.Qe2!?–/+) 36...Kf8–+ 37.Qc6 (better 37.Ra3–+) 37...Rd7 (37...Qe3 38.Kh2 Qf4 39.Kg1 Nc4 40.Qc7 Qc7 41.Rc7–+) 38.Kh2? (38.Ra8 Kf7 39.Qd5 Qe6 40.Qh5 Ke7 41.Qh7 Qe3 42.Kh1 Qc1 43.Kh2 Qf4 (43...Nc4?? 44.Qg7 Ke6 45.Re8 Kd6 46.Qf6 Kd5 47.Qe6) 44.Kg1 Ke6–/+ (44...Nc4 45.Qg7 Kd6 46.Qf8 Kd5 47.Qg8 Kd6 48.Re8 Qc1 49.Kf2 Qc2 50.Re2 Qe2 51.Ke2 Re7 52.Kf2+–; 44...Qc4?! 45.Qg7 Qf7 46.Qg4=+)) 38...Kf7?? (better 38...Nc4 39.Ra4 Na5–+ (39...Ne3?! 40.Re4=+)) 39.Qd5=+ Qe6 40.Qe6? (40.Qh5 Ke7 41.Qh7 Qc4 42.Nh4=) 40...Ke6–+ 41.Nd2 f5 (41...c6 42.Ra6 cb5 43.Rb6 bc4 44.Nc4–+) 42.Kg3 Ke5 43.Kf3 Ne4 (43...h5!?–/+) 44.Ne4=+ fe4 45.Ke2 g6 46.Ra8 h5 47.Re8 Kf6 (47...Kf5 48.Rf8 Ke6 49.g4=+) 48.Rg8 (better 48.Re4!? c6 49.Rf4 Ke7 50.bc6+=) 48...Kg5 49.Re8 Kh4 50.Re5 g5 51.Re4 g4 52.hg4 hg4 53.Re5 Kg3 54.Rg5 Re7 55.Rg6 Rd7 (better 55...Rh7=+) 56.e4 (56.Rg5 Rh7=+) 56...Re7 (better 56...Kf4–/+) 57.Ke3= Re5 58.Rg7 Re7?? (better 58...Rh5=) 59.Re7+– Kg2 60.Rg7 g3 (60...Kg3 61.e5 Kh3 62.e6 Kh4 63.e7 Kh5 64.e8Q Kh4 65.Qd7 Kh5 66.Qg4 Kh6 67.Qg5) 61.e5 Kg1 (61...Kh3 62.Kf3 Kh4 63.Rg3 Kh5 64.e6 c6 65.e7 Kh4 66.e8Q cb5 67.Qh8) 62.e6 (62.Rg3 Kh2 63.Kf3 Kh1 64.e6 c6 65.e7 cb5 66.e8Q bc4 67.Qh5) 62...g2 (62...Kh1 63.e7 Kh2 64.e8Q g2 65.Qg6 g1Q 66.Qg1 Kh3 67.Qg3) 63.Rg2! Kf1 (63...Kg2 64.e7) 64.e7 (64.Kf3 Ke1 65.e7 c6 66.e8Q Kd1 67.Qe2 Kc1 68.Rg1) 64...Kg2 65.e8Q Kf1 (65...Kh3 66.Kf3 Kh4 67.Qg6 c6 68.Qg4) 66.Qe7 (66.Qg6 c6 67.Qg3 cb5 68.Qf2) 66...Ke1 (66...Kg2 67.Qg5 Kh3 68.Kf2 c6 69.Qg3) 67.Qe6 (67.Qe4 c6 68.Qh1) 67...Kd1 68.Qd5 (68.Kd3 Kc1 69.Kc3 Kb1 70.Kb3 c6 71.Qe1) 68...Kc2 69.Qc6 (69.Qd3 Kb2 70.Kd2 Ka2 71.Qc2 Ka3 72.Kc3 c6 73.Qb3) 69...Kb3 70.Qc7 (70.Kd3 Kb2 71.Qg2 Kb3 72.Qc2 Kb4 73.Qb1 Ka3 74.Kc3 c6 75.Qa1) 70...Kb4 71.Qb6 (71.Kd3 Ka3 72.Kc3 Ka2 73.Qh2 Ka3 74.Qb2 Ka4 75.Qa1) 71...Kc4 72.Qc6 Kb4 (72...Kc3 73.b6 Kb2 74.b7 Kc2 75.Qc5 Kd1 76.b8Q Ke1 77.Qb1) 73.b6 c4 (73...Kc4 74.b7 Kb3 75.b8Q Kc2 76.Qc5 Kd1 77.Qb1) 74.b7 c3 (74...Kb3 75.b8Q Kc3 76.Qcd6 Kc2 77.Qd2) 75.b8Q Ka3 76.Qca8 1–0. BeepBeepImAJeep (2730) – Burrower (2305), lichess.org, 2019.

5.c4 Nf6 6.a4 d5 7.Nc3 (7.cd5 Nd5 8.Nf3 e4=+) 7...dc4 (7...d4 8.Nce2 de3 9.de3 Qd1 10.Rd1–/+) 8.Bc4= Bd6 9.Nf3 0–0 10.0–0 Be6 (10...e4 11.Ng5 Bh2 12.Kh1 Be5–/+) 11.Be6+= fe6 12.d4 (12.d3 a6+=) 12...ed4 13.Nd4 e5? (better 13...Qe7=) 14.Qb3 Kh8 15.Ne6 Qd7 16.Nf8 Rf8 17.Rad1 Qg4 18.h3 Qh5 (18...Qg5!? 19.Qc4 Nh4+–) 19.Ba3 Nh4 20.Bd6 cd6 21.Qc4 Qg5 Do you see the mate threat? 22.g3 Qf5?? (better 22...Nf5 23.Kh2 Qh5+–) 23.Qh4 (23.gh4?! Qh3 24.Qe2 Ng4+–) 23...d5 (23...Qe6 24.e4+–) 24.Nd5 (24.Nd5 Ng8 25.f3+–) 1–0. BeepBeepImAJeep (2745) – drg2 (2465), lichess.org, 2020.

5.c4 Nf6 6.a4 d5 7.Nc3 (7.cd5 Nd5 8.Bc4 Nb6=+) 7...d4–/+ 8.Nb1 Bc5 9.Nf3 0–0 10.Ba3 Qe7 11.Bc5 Qc5 12.Na3 de3 13.fe3 Bg4 14.Be2 Rab8 15.Nc2 Rbd8 (15...e4 16.d4 ed3 17.Qd3 Bf3 18.gf3–/+) 16.0–0 Bf3 17.Rf3 e4 18.Rf1 Ne5 19.Nd4 Nd3 20.Bd3 ed3 21.Rf4 Rfe8 22.Rc1 (22.Qb3!?+=) 22...Ne4= 23.h3 (better 23.Nf5!? Qa3 24.Rg4=+) 23...Rd4–/+ 24.ed4 Qd4 25.Kh2 Qe5 26.g3 g5 (better 26...Ng3 27.Kg3 g5–+) 27.Rf3= f5 (27...Qb2 28.Re3 (28.Rd3 Nf2 29.Rb1 Nd1 30.Rb2 Nb2–+) 28...Kg7 A) 29.Rd3? Nf2 30.Qh5 Nd3 (30...Qc1?! 31.Qg5 Kf8 32.Qc5 Kg8 33.Qf2+=) 31.Qg5 Kh8–+; B) 29.Kg2=) 28.Qe1 (worse 28.Rd3 Nf2 29.Re3 Nd1 30.Rd1 Qd4 31.Re8 Kf7=+) 28...h5 29.Rd3 h4 30.Re3 (better 30.Rd5!? Qg3 31.Qg3 Ng3 32.Kg2=) 30...hg3=+ 31.Kg1 f4 32.Re2?? (32.Rd3 Qh8 33.Qf1 g4–+) 32...Qd4 (better 32...f3 33.Re4 f2 (33...Qe4?! 34.Qg3 Re7 35.Kh1=+) 34.Kg2 fe1Q (34...Qe4?! 35.Qe4 Re4 36.Kf1–+) 35.Ree1 Qe1 36.Re1 Re1 37.Kg3 Kf7–+) 33.Kg2–/+ Re5?? (better 33...Re7 34.Rc3 g4 35.hg4 Qh8–+) 34.Qf1?? (34.Rc3 A) 34...Nc3?? 35.Re5 f3 36.Kf3 Qf2 37.Qf2 gf2 38.Kf2 (worse 38.Rg5 Kf7 39.Kg2 Na4+–) 38...Na4 39.Re7+–; B) 34...Kf7+=) 34...Qd3 (better 34...Nd2 35.Rd1 Nf1 36.Rd4 Re2 37.Kf1 f3–+) 35.Qf3+= Qf3? (better 35...Qd7 36.d3 g4 37.Qg4 Qg4 38.hg4 f3 39.Kf3 Ng5 40.Kf4 Re2 41.Kg5 Rd2+=) 36.Kf3+– Nd2 37.Rd2 Re3 (37...Kf7 38.Rd7 Ke6 39.Rg7+– (39.Rc7?! Re3 40.Kg4 g2=)) 38.Kg4 Kf7 (38...Re4 39.Rd7 g2 40.Rc7+–) 39.Kg5 f3 (39...g2 40.Rg2 Rh3 41.Kf4 Rh4 42.Kg5+–) 40.Kf4 Ra3 41.Kg3 (41.Kg3 Ke7 42.Re1 Kf6 43.Rf2+–) 1–0. BeepBeepImAJeep (2620) – Kingscrusher_YouTube (2405), lichess.org, 2018.

5.Nf3 e4 6.Nd4 c5 7.Nf5 (7.bc6!? dc6 8.Be2+=) 7...Nf6= 8.d3 d5 9.de4 de4 (9...Ne4!? 10.Ng7 Bg7 11.Bg7 Rg8=) 10.Qd8+– Kd8 11.Ng7?? (better 11.Ng3+–) 11...Bg7–+ 12.Bc4 (12.Nd2 Re8–+) 12...Ke7 13.0–0 (13.Nd2 Bf5–+) 13...Be6 (13...Rd8 14.Na3–+) 14.Bb3 (14.Be6 Ke6 15.Nd2 Rhd8 16.Bf6 Bf6–+ (16...Kf6?! 17.Ne4 Kf5 18.Ng3 Ke6 19.Rad1–+; 16...Rd2?! 17.Bg7 Rg8 18.Bc3 Rc2 19.Rfc1 Rc1 20.Rc1=+)) 14...c4 15.Ba4 b6 (15...Rhg8 16.Nd2–+) 16.Nc3 (16.Nd2 Nh4 17.Rad1 Rhg8–+) 16...Rhg8 17.f3 (17.Rad1–+) 17...ef3 18.Rf3 Nd5 19.e4 (19.Ba3 Ke8 20.Nd5 Bd5–+) 19...Nc3 20.Bc3 Bc3 (better 20...Nh4!? 21.Raf1 Nf3 22.Rf3 Bc3 23.Rc3–+) 21.Rc3 Nf4 22.Kf2 Ng2 23.Rg3 Nf4 0–1. GuestTYQQ – GuestVJJX, freechess.org, 2019.

4.Bb2 Nf6

5.c4 d5 6.a4 dc4 7.Bc4 Bg4 (7...Nh4 8.Kf1=) 8.Nf3 (8.Qb3 e6+=) 8...e6 9.0–0 Bd6 10.d4 0–0 11.Nbd2 Nd5 12.Be2 (12.h3 Bf3 13.Qf3 Nh4+=) 12...Re8 13.Nc4 Qd7 (13...Bb4 14.Qc2=) 14.Nfe5 Be5 15.Bg4 Bf6 16.Bf3 Nb6? (better 16...a6 17.Qb3 ab5 18.ab5 Nh4+=) 17.Na5+– Rab8 18.Bb7 Qd6 (18...Ne7 19.Qf3+–) 19.Ba3 (19.Bc6 Qb4 20.Be8 Qb2+–) 19...Qd8 (19...c5+–) 20.Nc6 Qd7 21.Nb8 Rb8 22.Bc6 Qd8 23.a5 Nd5 24.Bc5 Nde7 25.Ba7 Nc6 26.bc6 Ra8 27.Bc5 e5 28.d5 e4 29.Ra4 Ne5 30.Re4 Ra5 31.Bb4 (better 31.f4 Ng6 32.Bb4 Ra1+–) 31...Rd5 32.Qc2 Nd3 33.Ba3 g6 (33...Ne5 34.f4 Nd3 35.Ra4+–) 34.g3 (34.Rd1 h6+–) 34...h5 35.Qc4 (35.Ra4 Ne5+–) 35...Kg7? (35...Ne5 36.Qe2+–) 36.Bb4 (36.Rd1!? h4+–) 36...Ne5 37.Qc2 Nd3 (37...Qa8 38.Rc1+–) 38.Bc3 Rd6 39.Bf6 Qf6 40.Rd4 (40.f4 Kh7+–) 40...Ne5 (40...Rd4 41.ed4 Nb4 42.Qc5 Nc6 43.d5+–) 41.Rd6 Qd6 42.Kg2 Qd5 43.e4 Qd6 44.f4 (44.Qc3 f6+–) 44...Nc6 45.Rf2 (45.Rc1!? Nb4 46.Qc3 Kg8 47.Qc7 Qd2 48.Kh3 Nd3+–) 45...Nd4 46.Qb2 c5 47.Rd2 (47.Qb7 Qe6+–) 47...Qc6+– 48.Qc3 (better 48.Rd4!? cd4 49.Qd4 f6 50.Qd3+–) 48...Qe4= 49.Kf2 h4 50.Qe3 (50.Qc5?? hg3 51.hg3 Qf3 52.Ke1 Qg3 53.Kf1 Qf3 54.Ke1 Qe3 55.Kf1 Qd2 56.Qe5 Kh7–+) 50...hg3 (50...Qh1!? 51.gh4 Qh2 52.Kf1 Qh1 53.Kf2 Qh4 54.Kf1 Qf6–/+) 51.hg3= Qh1 52.Qe5 Kh7 53.Qc5?? (better 53.Rd4 Qh2 54.Kf3 Qh1 55.Kf2 Qh2 56.Kf3 Qh1 57.Kf2=) 53...Qh2 (better 53...Qf3 54.Ke1 Qg3 55.Kf1 Qf3 56.Kg1 Qe3 57.Kf1 Qd2–+) 54.Ke1 (54.Ke3 Qd2!! 55.Kd2 Nb3 56.Ke3 Nc5 57.Kd4 Nb3 58.Ke4 f5 59.Kf3–+) 54...Nf3 (54...Qg1) 55.Kd1 (55.Kf1 Nd2 56.Ke1–+) 55…Qd2 0–1. BeepBeepImAJeep (2730) – federovski (2710), lichess.org, 2020.

5.c4 d5 6.a4 e6 7.Nf3 Be7 8.Be2 0–0 9.0–0 c6 10.d4 dc4 11.Bc4 cb5 12.ab5 b6 13.Nbd2 Bb7 14.Be2 Rc8 (14...Nd5!?+=) 15.Ra7+– Bf3 (15...Bd5 16.Bd3+–) 16.Bf3+– (worse 16.gf3 Qd5+=) 16...Bb4 17.Bc6 Ne7 18.Bf3 (18.Ne4 Nfd5 19.Rd7 Qe8 20.Rd5 Nc6+–) 18...Nf5 (18...Ng6 19.Ne4 Nd5+–) 19.Ne4 Ne4 20.Be4 Nd6 21.Bc6 Ba5?? (21...Qg5 22.Qb3 Ba5 23.Ra1+–) 22.Ba3 (better 22.Rd7 Qf6 23.Rd6+–) 22...Rc7 23.Ra8 (23.Ra6!? f5+–) 23...Qa8?? (better 23...Qe7+–) 24.Ba8 (24.Ba8 Ra8 25.Bd6+–; 24.Bd6?! Rc6 25.bc6 Rc8+–) 1–0. BeepBeepImAJeep (2665) – par40 (2125), lichess.org, 2017.

5.c4 e5 6.a4 Bb4 7.Nc3 0–0 8.Nf3 e4 9.Nd4 Ne5 10.Qc2 c5 11.Nb3 Bc3 12.Bc3 Re8 13.Be2 White prepares a5 (13.Nc5 d5+=) 13...d6 14.0–0 Bf5 15.a5 Bg6 16.Qd1 Qe7 17.a6 b6 18.f4 ef3 19.Bf3 Rad8 20.Be2 d5 21.cd5 (better 21.Ra4!?=+) 21...Nd5–/+ (21...Rd5?! 22.Be5 Re5 23.Bc4=+) 22.Qc1 Nc3 (22...Nd3!? 23.Bd3 Bd3–+) 23.Qc3–/+ Nd3 24.Rf3 (24.Ra3 Qd7=+) 24...Qe5 (24...Qd7 25.Raf1–/+) 25.Qe5 (25.Qc4 Nb2 26.Qc1 Bh5–/+) 25...Re5 (25...Ne5 26.Rf2–+) 26.Raf1 (26.Ra4 Ree8–/+) 26...Red5 (26...Bh5–+) 27.Na1? (better 27.Rh3=+) 27...Ne5 28.R3f2 Rd2 29.Nb3 (29.h4–+) 29...Rb2 30.Bd1 Rf2 (better 30...Rb1 31.Nd2 Rb5–+) 31.Kf2 Bd3 32.Re1? (better 32.Be2–+) 32...Bb5 33.Kg3 (33.Be2 Nd3 34.Bd3 Rd3–+) 33...Nd3 34.Rg1 Rd6 (34...Re8 35.Bf3–+) 35.Bf3 Rg6 36.Kh3 Rh6 (36...Re6!? 37.e4–+) 37.Kg3 Rg6 (37...Re6 38.e4–+) 38.Kh4?? (38.Kh3 Re6 39.e4–+) 38...Bd7 (38...Re6 39.Rb1 Ba6 40.Ra1–+) 39.g4 (39.Nc1 Nf2 40.h3 Bc6–+) 39...Rh6 40.Kg3 Rf6 (40...Re6 41.Nc1 Re3 42.Nd3 Rd3 43.Kf2–+) 41.h3 (41.Nc1 Ne5 42.Be2 Bg4 43.Bg4 Ng4–+) 41...Ne5 (41...Re6!? 42.Nc1 Re3 43.Nd3 Rd3 44.Kf2–+) 42.Be2 Rd6 43.Nc1 (43.Rb1 g5–+) 43...f6 44.Rd1 (44.Nb3 Be6 45.Rb1 Bc4 46.Bc4 Nc4–+) 44...Rd1 45.Bd1 Bb5 46.Kf4 Ba6 47.Bb3 Kf8 (47...c4 48.Bc2–+) 48.Bc2 Ke7 49.Nb3 (49.Bh7 g5 50.Kg3 Bc4–+) 49...g5 50.Kg3 h6 51.Nd2 Bb7 52.Ne4 (52.Be4 Be4 53.Ne4 a6–+) 52...Be4 53.Be4 a5 54.Bc2 (54.Kf2 a4 55.Ke2 b5–+) 54...b5 55.Kf2 a4 56.e4 (56.Ke2 a3 57.Bb1 b4–+) 56...c4 (better 56...a3 57.Bb1 b4–+) 57.Bb3 (57.Ke2 a3 58.Bb1–+) 57...cb3 58.Ke3 b2 59.Kd4 b1Q 60.Kc5 Qb3 61.Kb6 Qe3 62.Ka5 (62.Ka6 a3 63.h4 a2 64.Kb7 Qe4 65.Kb8 Qc6 66.Ka7 a1Q 67.Kb8 Qaa8) 62...Qe4 (62...Kd6 63.Kb5 Qb3 64.Ka6 Kc6 65.Ka5 Qb5) 63.Ka6 (63.Kb5 Qc4 64.Kb6 Qb4 65.Kc7 Qd6 66.Kb7 Nd7 67.Ka7 Qc7 68.Ka6 Qb6) 63...Qg4 (63...Nc4 64.Kb5 Nd6 65.Ka5 Qc4 66.Kb6 Qb5 67.Kc7 Qb7) 64.Ka5 Qh3 65.Kb4 (65.Kb6 Nd7 66.Ka5 Qf5 67.Ka6 Qc5 68.Ka5 f5 69.Ka6 Qb6) ½–½. BeepBeepImAJeep (2560) – Gilevich (2305), lichess.org, 2018.

5.c4 e5 6.a4 Bc5 7.Nc3 d6 8.Nf3 0–0 9.d4 ed4 10.Nd4 Re8 (10...Bg4 11.Be2 Be2 12.Nce2 (12.Qe2? Bd4 13.0–0 Re8–+) 12...Bb4 13.Bc3 Bc3 14.Nc3=) 11.Be2= h5 (11...Bb4 12.0–0=) 12.0–0+= Ng4 13.h3 Qh4? (13...N4e5!?+–) 14.Nf3 (14.Nd5 Ne3 15.fe3 c6+–) 14...Qe7 (14...Ne3!? 15.fe3 Be3 16.Kh1 Qg3+–) 15.Nd5 Qd8 (15...Qd7 16.hg4 hg4+–) 16.Nd4?? (16.hg4 Bg4 17.a5 c6+–) 16...N6e5? (16...N4e5 17.f4 c6 18.Nc3+–) 17.Nb3 (17.hg4 c6 18.Nf4 hg4+–) 17...Qh4?? (better 17...c6 18.hg4 cd5 19.gh5 Nc4+–) 18.Nc5+– dc5 19.Nf4 (better 19.Nc7!? Rd8 20.Qc2 Rb8+–) 19...Be6 (19...Nf6 20.Be5 Re5 21.Qd8 Re8 22.Qc7+–) 20.Ne6 Re7?? (20...Re6 21.hg4 Ng4 22.Bg4 hg4+–) 21.f4 (better 21.Nc5 Nf6 22.Nb7+–) 21...Ne3+– 22.Qd2 (better 22.Qc1 Nf1 A) 23.Be5 Ng3 24.Bf3 Re6–/+ (24...fe6?! 25.Qe1=); B) 23.Bf1?! Nf3 24.gf3 Re6+=; C) worse 23.fe5 Ng3 24.Bf3 Re6–/+; D) 23.Kf1?! Ng4 24.Bg4 hg4 25.Ng7 gh3+–; E) 23.Qf1+–) 22...Ng2?? (better 22...Qg3 23.Rf2 N5c4+=) 23.Kg2 (better 23.fe5 Re6 24.Rf2+– (24.Kg2?! Rg6 25.Bg4 hg4+=)) 23...Re6 24.f5 (24.Qe1 Ng6 25.Qh4 Nh4 26.Kf2 g6+–) 24...Rd8 25.Qf4 (25.Qc3 Re7+–) 25...Qf4 (25...Ng6 26.Qf2 Nf4 27.Kf3 Rd3 28.Bd3 Qh3 29.Qg3 Re3 30.Ke3 Qg3 31.Rf3 Ng2 32.Ke2 Qg4=) 26.Rf4+– Rd2?? (better 26...Ng6 27.Rf2 Nf4 28.Kf3 Re2 29.Re2 Ne2 30.Ke2 f6+–) 27.fe6 Re2 (27...fe6 28.Re4 Nc4 29.Bc3+–) 28.Rf2 (better 28.Kf1 Ng6 29.ef7 Kf8 30.Bg7 Kg7 31.f8Q Nf8 32.Ke2+–) 28...Rf2 29.Kf2 Nd3 30.Ke2 (better 30.Kf3!? fe6 31.Bc3 e5+–) 30...Nb2 (30...Nf4 31.Ke3 Ne6+–) 31.e7 (31.e7 Kh7 32.e8Q Nc4 33.Qe4 Kh6 34.Qc4 Kg6 35.Rg1 Kh7 36.Qf7 c4 37.Qg7) 1–0. BeepBeepImAJeep (2540) – Kingscrusher_YouTube (2260), lichess.org, 2015.

5.c4 e5 6.a4 Bc5 7.Nc3 d6 8.Nf3 a6 9.d4 ed4 10.Nd4 Ba7 (10...0–0!?=) 11.Be2 0–0 12.0–0 h5? (12...Ne5!?+=) 13.Bh5 (13.ba6!? ba6 14.Nc6 Qe8 15.Na7 Ra7+–) 13...Nh5+– 14.Qh5 Re8 15.Nd5 Re5 (15...Ne5 16.Qe2+–) 16.Qd1 Qh4? (better 16...Rg5 17.Kh1 Bg4+–) 17.Nf3 Qh5 (17...Qd8 18.Ne5 de5+–) 18.Ne5 de5 (18...Qd1 19.Rfd1 de5 20.Nc7 Rb8+–) 19.Qh5 (19.Qh5 c6 20.Nc7+–) 1–0. BeepBeepImAJeep (2520) – Kingscrusher_YouTube (2270), lichess.org, 2018.

5.c4 e5 6.a4 Bc5 7.Nf3 d6 8.Be2 Rb8 9.0–0 b6 (better 9...e4!? 10.Ne1 Be6=) 10.d4+– ed4 11.ed4 Bb4 12.Qb3 Ba5 13.d5 0–0 14.Nd4 Bd7 15.Nc3 Re8 16.Bd3 Ne5 17.Rad1 Nfg4 18.h3 Nd3 19.Rd3 Ne5 20.Rg3 Qh4 21.Nce2 Kh8 22.f4 Ng6 23.Qf3 (23.f5 Ne5+=) 23...Bb4 24.Kh2 Bc5 25.Nb3 (25.Qc3!? f6 26.f5+=) 25...Re3=+ 26.Nc5?? (better 26.Qe3 Be3 27.Re3–/+) 26...Rf3–+ 27.Rgf3 (27.Nd7 Rf1 28.Nb8 h5–+) 27...bc5 (27...dc5?! 28.f5 Nf8 29.Rf4–+) 28.f5 Ne5 29.Rf4 Qg5 30.f6 g6 31.h4 (31.Bc1 Nd3 32.Re4 Nc1 33.Nc1 Bf5–+) 31...Qh6 32.Ng3 (32.Be5 Re8 33.Kg1 de5 34.R4f2–+) 32...Ng4 (better 32...Nd3!? 33.Re4 Nb2 34.a5–+) 33.Kg1 Qh4 34.R1f3 Qh2 35.Kf1 h5 (35...Re8 36.Bc1 Qh4 37.Rc3–+) 36.Bc1 (36.Re4 Bf5! 37.Re7 h4–+) 36...Re8 37.Re4 (37.Rc3–+) 37...Re4 38.Ne4 Qh1 39.Ke2 Qg2 40.Nf2 Bf5 (40...Nf2 41.Rf2 Bg4 42.Ke1 Qe4 43.Kd2 Qd4 44.Kc2 Qf2 45.Kb3 Bd1 46.Ka3 Qc2 47.b6 Qb3) 41.Bf4 Be4 42.Rg3 Qf2 (42...Nf2?! 43.Rg2 Nh3 44.Bd6 cd6 45.Rg3–/+) 43.Kd1 Qf4 (43...Qf1 44.Kd2 Qf4 45.Kc3 Qc1 46.Kb3 Bc2 47.Ka2 Qb1 48.Ka3 Qa1) 44.Rg4 (44.Rc3 Qf1 45.Kd2 Qf2 46.Kd1 Qd4 47.Ke2 Bc2 48.Rc2 Qf2 49.Kd1 Ne3 50.Kc1 Qc2) 44...Qg4 45.Kd2 Qf3 46.a5 Qd3 (46...Qf2 47.Kd1 Qc2 48.Ke1 Bd3 49.b6 Qe2) 47.Ke1 Qc2 48.b6 (48.Kf1 Qg2 49.Ke1 Bf3 50.b6 Qe2) 48...cb6 (48...Bd3 49.ba7 Qe2) 49.ab6 (49.Kf1 Qg2 50.Ke1 Bf3 51.ab6 Qe2) 49...ab6 (49...Bd3 50.ba7 Qe2) 50.Kf1 h4 (50...Qd2 51.Kg1 Qg2) 51.Kg1 (51.Ke1 h3 52.Kf1 Bd3 53.Kg1 Qg2) 51...h3 (51...Qg2) 52.Kf1 Qg2 (52...Bd3 53.Kg1 Qg2) 53.Ke1 h2 54.Kd1 h1Q 0–1. BeepBeepImAJeep (2520) – Kingscrusher_YouTube (2405), lichess.org, 2016.

5.c4 e5 6.a4 d5 7.Nf3 White fights for the Initiative 7...e4 8.Nd4 Bb4 9.cd5 0–0 10.Bc4 Re8 (10...Ne5 11.Qb3 Bc5 12.d3=) 11.0–0 (better 11.Qb3 Qd6 12.b6+=) 11...Nd5?? (better 11...Ne5 12.d3 ed3 (12...Nd5? 13.Qb3 c6 14.Bd5 Qd5 15.Qb4 Nd3 16.Qd2+–) 13.Bd3 Nd5=) 12.Qb3+– c5?! (12...Nge7 13.d3 ed3 14.e4+– (14.Qd3?! Nb6=; 14.Bd3?! Bd6+=)) 13.bc6 Ndf4 (13...Nge7 14.d3 ed3+–) 14.ef4 (14.Bf7 Kh8 15.Be8 Qe8 16.Qb4 Nd3 17.cb7 A) 17...Nb4?? 18.ba8Q (18.bc8B?! Rc8 19.Nf5 Rc7+=) 18...Nd3 19.Nb5+–; B) 17...Bb7 18.Qb7 Rb8 19.Qa7 Rb2+–) 14...Nf4 (14...Qe7 15.cb7 Bb7 16.Nf5+–) 15.Bf7 Kh8 16.Be8 Qg5 (16...Qe8 17.cb7 Rb8 18.bc8B Qc8 19.Bc3+–) 17.Qg3 Qg3 18.hg3 bc6 (18...Nd3 19.Bc3 Bg4+–) 19.Bc6 Ba6 20.Ba8 Nd3 21.Bc3 Bc5 22.Be4 Ne5 23.Bf3 (23.Re1 Nd7 24.Nf5 h5+–) 23...h5 24.Be2 (24.Re1 Nf3 25.Nf3 Bb7+–) 24...Nc4 25.Bc4 (better 25.Ne6!? Bd6+–) 25...Bc4 26.Re1 Bd4 27.Re8 Kh7 28.Bd4 Bd3 29.Re7 h4 30.Rg7 Kh6 31.gh4 (31.gh4 Bg6 32.g4+–) 1–0. BeepBeepImAJeep (2560) – Gilevich (2350), lichess.org, 2018.

5.c4 e6 6.a4 d5 7.Nf3 c5 8.Be2 Be7 9.0–0 0–0 10.d4 cd4 11.Nd4 (11.Qd4 dc4 12.Qc4 Bd7+=) 11...dc4= 12.Bc4 b6? (better 12...e5!? 13.Nf3 Bd6=) 13.Nc6+– Qe8 (13...Qd1 14.Rd1 Bb7 15.Ne7 Ne7 16.Bf6 gf6 17.Rd7+–) 14.Be2 (14.Ne7!? Qe7 15.Ba3+–) 14...Bb7 15.Bf3 Rc8 (15...Nh4 16.Ne7 Qe7 17.Ba3+=) 16.Nc3 (16.Ne7 Qe7 17.Ba3 Rc5+–) 16...e5 (16...Rc7 17.a5+=) 17.Na7 (better 17.Ne7 Qe7 18.Ba3 Bf3 19.Qf3+–) 17...Rd8= 18.Qe2 (18.Bb7? Rd1 19.Nd1 Qd7–+) 18...e4 19.Bg4 Ne5 20.Bh3 Nd3 21.Ba3 Ba3 22.Ra3 Qe5 23.Nc6 g5?? (23...Bc6 24.bc6 Qd6 25.Rfa1=+) 24.g3 (24.Ne5 Ne5 25.Bf5 Rd3+–) 24...h5?? (better 24...Bc6 25.bc6 Qd6=) 25.Bg2 (25.Ne5 Ne5 26.Bg2 Rd3+–) 25...g4?? (better 25...Bc6 26.bc6 Nc5+–) 26.Ne4!! Ne4 (26...Qe4 27.Be4) 27.Rd3 (better 27.Ne5 Ne5 28.Qa2+–) 27...Ng5?? (27...Bc6 28.Rd8 Rd8 29.bc6 Nc3+–) 28.Ne5 (28.Ne5 Bg2 29.Kg2+–; 28.Nd8 Bg2 29.h4 Nf3 30.Kg2 Qe4=) 1–0. BeepBeepImAJeep (2585) – Kingscrusher_YouTube (2300), lichess.org, 2017.

3.e4 d5

4.d4 Ng4 5.Be2+= h5 6.e5 c6 7.a4 cb5 8.ab5 a6 (8...Bf5 9.h3 N4h6 10.Nc3+=) 9.Nf3 (9.ba6 ba6 10.h3 N4h6+/–) 9...f6 10.h3 N4h6 11.ba6 ba6 12.Nh4 Kf7? (12...Qb6 13.Ng6 Rh7 14.Bf3+–) 13.Bh6 (better is 13.Bd3 g5 14.Qh5 Ke6 15.Ng6+–) 13...Nh6 14.Bd3 g5 (better is 14...Qb6 15.Ng6 Rg8+–) 15.Qh5 Kg8 (15...Ke6 16.Ng6 Rg8 17.h4 fe5 18.hg5+– (18.Nf8?! Qf8 19.Bh7 Nf5+–)) 16.Ng6 Nf7 (16...Qb6+–) 17.Nh8 f5 18.Nf7 Qb6 19.Ng5 (19.Ng5 Qh6 20.Qf7 Kh8 21.Qd5 Qg5 22.Qa8+–) 1–0. Taulien,Hans_Juergen (2350) – Spinczyk,Simon (2000), remoteschach.de, 2002.

4.ed5 Qd5 5.d4 =.

4.Qh5 Qd6 5.d4+= Qb4?? 6.c3+– Nf6 (6...Qa4 7.Qe5 Qc2 8.Ne2 Qe4 9.Qe4 de4 10.Ng3+–) 7.Qe5 (7.de5?! Qb1 (7...Nh5?? 8.cb4 de4 9.Nc3+–) 8.Rb1 Nh5 9.ed5 Bf5+–) 7...Qd6 1–0. Trkn – guest1856, ICC, 2004.

4.Qh5 Qd6 5.d4 Ng4 6.Qd5 (worse is 6.ed5 N8f6 7.Qh4 Ne4+=) 6...Qf6 (6...Qg6!?+=) 7.f3 e6 8.Qc4 Qh4? (better is 8...N4h6+–) 9.g3. Anonymous – Anonymous, sv.lichess.org, 2011.

4.Qh5 Qd6 5.d4+= Ng6 6.Qd5 Qd5 7.ed5 Nf6 +=.

4.Qh5 Nd7 5.Qd5 Ngf6 6.Qd3 +=.

4.d4 Ng6

5.ed5 Qd5 6.c4 Qd8 7.Nf3 Bg4 8.Be2 Nf6 9.0–0 e6 10.Nc3 Bb4 11.Qb3 Qe7 12.c5 Bc3 13.Qc3 Nd5 14.Qc4 0–0 15.h3 Bf3 16.Bf3 Rad8 17.Qa4 Ra8 18.c6 b6? 19.Bd5 ed5 20.Ba3 Qg5 21.Bf8 Rf8 22.g3 Qf5 23.Qa7 Qh3 24.Qc7 (24...Qg4 25.Rfd1+–) 1–0. Flaubert – PineMartin, Live Game Caissa's Web, 2006.

5.e5 e6

6.Bd3+= c5 7.bc6 bc6 8.Nf3 Ba6 9.0–0 Bd3 10.Qd3 Rb8 11.Bd2 (11.c4 N8e7+=) 11...c5 12.Nc3 c4 13.Qe2 Bb4 14.Rab1 N8e7 15.Nb5 Rb5 16.Bb4 Qb6 17.Bc5 Rb1 (17...Qa5 18.Rb5 Qb5 19.a3+=) 18.Bb6+/– Rb6 19.h4 0–0 (19...Nf5 20.h5 Nge7 21.Qd2+=) 20.h5 Nh8 21.c3 (21.h6 gh6 22.Kh2 Rb2+/–) 21...f5 (21...Rfb8!?+=) 22.ef6!+/– gf6 (22...Rf6 23.Ne5 Combination; 22...gf6 23.Re1 Combination) 23.a4 Rfb8 24.a5 Ra6 25.Qd2 Rb3? (better is 25...Nf5!?+–) 26.Qh6 Rc3 (26...Nf5 27.Qf6 Nf7+–) 27.Qf6 (27.Qf6 Nf5 28.Ng5+–) 1–0. wiking – Jo_AnnaSummer, queenalice.com, 2009.

6.Nf3 a6 7.ba6 ba6 8.c4 (8.Be3 Bd7 9.Nbd2 Bb5 10.c4 dc4 11.a4 Bc6 12.Bc4 N8e7 13.Qc2+=; 8.Bd3 c5 9.c3 Bd7 10.Be3 c4 11.Bc2 Qb6 12.Bc1 Rb8 13.0–0=; 8.Bg5 N8e7 9.Bd3 c5 10.c3 c4 11.Bc2 h6 12.Bc1 Rb8 13.Ba3=) 8...N8e7 9.c5 Nf5 10.Bd3 Ngh4 11.Nh4 Qh4 12.Bf5 ef5 13.Nc3 +=.

6.Nf3 a6 7.Bd2 A) 7...Bd7 8.ba6 (8.Nc3 ab5 9.Nb5 c6 10.Nd6 Bd6 11.ed6 Nf6 12.Bd3 Bc8 13.Bb4=) 8...ba6 9.c4 c5 10.Be3 cd4 11.Bd4 N8e7 12.cd5 Nd5 13.Nbd2=; B) 7...Nh4 8.Nc3 (8.ba6 ba6 9.Be3 Nf5 10.Bg5 f6 11.ef6 gf6 12.Ne5 Bb7 13.Qh5+=; 8.c3 Bd7 9.ba6 ba6 10.Be3 Nf3 11.Qf3 Qb8 12.Bc1 c5 13.Nd2=; 8.Be3 ab5 9.Nh4 Qh4 10.Bb5 Bd7 11.Bd7 Kd7 12.0–0 Ne7 13.Nd2+=) 8...Nf3 9.Qf3 ab5 10.Bb5 Bd7 11.Bd3 Qh4 12.Qe3 Nh6 13.Rb1+=; C) 7...b6 8.Nc3 (8.Bd3 ab5 9.Bb5 Bd7 10.Bd3 c5 11.Be3 cd4 12.Bd4 N8e7 13.0–0=; 8.Be2 Qd7 9.a4 ab5 10.Bb5 c6 11.Bd3 Ba6 12.Bg6 hg6 13.a5=; 8.c4 dc4 9.Bc4 ab5 10.Bb5 Bd7 11.Bd3 N8e7 12.0–0 Bc6 13.Nc3=) 8...ab5 9.Bb5 Bd7 10.Bd3 c5 11.dc5 Bc5 12.Nb5 Qb8 13.0–0=; D) 7...ab5 8.Bb5 Bd7 9.Bd3 c5 10.Be3 cd4 11.Bd4 N8e7 12.0–0 Nc6 13.Re1=.

6.Nf3 a6 7.Bd3 ab5 8.Bb5 Bd7 9.Bd3 c5 10.Be3 cd4 11.Bd4 N8e7 12.0–0 Nc6 13.Bc3 =.

6.Nf3 a6 7.Be2 ab5 (7...Nh4 8.Nh4 Qh4 9.ba6 ba6 10.0–0 Rb8 11.c3 Rb6 12.Nd2 Bd7 13.a4+=; 7...Qd7 8.a4 ab5 9.Bb5 c6 10.Bd3 b6 11.Qe2 Qa7 12.0–0 Ba6 13.Bd2=; 7...Bd7 8.ba6 ba6 9.0–0 Bb5 10.Nc3 Be2 11.Ne2 Rb8 12.Qd3 Rb6 13.Be3+=) 8.Bb5 Bd7 9.Bd3 c5 10.Be3 cd4 11.Bd4 N8e7 12.0–0 Nc6 13.Re1 =.

6.Nf3 c5 7.bc6 bc6 8.c4 (8.Be2 Ba6 9.Ba6 Qa5 10.Nc3 Qa6 11.Ne2 Rb8 12.0–0 N8e7 13.c3=; 8.Bd3 c5 9.c3 Qa5 10.Bd2 c4 11.Bc2 Rb8 12.a3 N8e7 13.Ra2=; 8.c3 c5 9.Bd3 Qa5 10.0–0 Ba6 11.c4 cd4 12.Bd2 Bb4 13.Bb4=) 8...c5 9.cd5 ed5 10.dc5 Qa5 11.Bd2 Qc5 12.Nc3 Bg4 13.Bb5 +=.

6.Nf3 c6 7.bc6 bc6 8.c4 (8.Be2 Ba6 9.Ba6 Qa5 10.c3 Qa6 11.h4 N6e7 12.h5 h6 13.Nbd2=; 8.Bd3 c5 9.Bg6 hg6 10.Ba3 Rb8 11.Bc5 Bc5 12.dc5 Qa5 13.Nbd2+=; 8.c3 c5 9.Bd3 Qa5 10.Bd2 c4 11.Bc2 Rb8 12.0–0 N8e7 13.Bg5=) 8...c5 9.cd5 ed5 10.dc5 Qa5 11.Bd2 Qc5 12.Nc3 Bg4 13.Bb5+=.

6.Nf3 c6 7.Nbd2 A) 7...N8e7 8.Nb3 (8.Rb1 Qa5 9.Rb2 Bd7 10.h4 Nf5 11.bc6 Bc6 12.h5 Nge7 13.Bd3+=; 8.a3 cb5 9.Bb5 Bd7 10.Bf1 Rc8 11.Nb3 Nc6 12.Bd3 Be7 13.0–0=; 8.a4 Qa5 9.Ba3 Bd7 10.Bc5 f6 11.h4 h5 12.Be2 Nf5 13.Bf8+=) 8...Bd7 9.a4 cb5 10.ab5 Qb6 11.Qd3 Nf5 12.Bd2 Qc7 13.Be2+=; B) 7...Bd7 8.bc6 (8.Rb1 Qa5 9.bc6 Bc6 10.a3 Rc8 11.Be2 Nf4 12.0–0 Ne2 13.Qe2=) 8...Bc6 9.Nb3 Bb4 10.Bd2 Qe7 11.Be2 Nf4 12.c3 Ne2 13.cb4+=; C) 7...Qa5 8.bc6 (8.c4 cb5 9.cb5 Bd7 10.a4 Rc8 11.Be2 a6 12.ba6 ba6 13.0–0=; 8.Bd3 cb5 9.0–0 b4 10.Nb3 Qc7 11.Bd2 a5 12.Rc1 N8e7 13.c4=; 8.a4 Bd7 9.Ba3 Ba3 10.bc6 Bc6 11.Ra3 N8e7 12.Ng5 Rc8 13.c3=) 8...bc6 9.Bd3 Nf4 10.0–0 Nd3 11.cd3 Qc3 12.Qb3 Qa1 13.Qc2+=; D) 7...c5 8.dc5 (8.Bd3 c4 9.Be2 Bd7 10.a4 Qa5 11.Kf1 a6 12.Bb2 Bb4 13.Nb1–/+; 8.c3 Qa5 9.Qb3 c4 10.Qb2 Be7 11.a3 Bd7 12.Rb1 a6 13.ba6=; 8.Bb2 c4 9.a4 Bd7 10.Bc3 a6 11.ba6 Ra6 12.a5 N8e7 13.Be2=) 8...Bc5 9.Nb3 Bb4 10.Bd2 Bd2 11.Qd2 N8e7 12.c4 0–0 13.Be2+=.

6.Nf3 c6 7.Bd3 A) 7...c5 8.dc5 (8.0–0 c4 9.Be2 Bd7 10.a4 a6 11.ba6 Ra6 12.Bg5 f6 13.ef6+=; 8.Be2 cd4 9.Qd4 Qc7 10.Be3 f6 11.ef6 Nf6 12.Bd3 Bd6 13.Bg6+=; 8.Be3 c4 9.Bg6 hg6 10.Nbd2 Bd7 11.a4 a6 12.b6 Qb6 13.a5–/+) 8...Bc5 9.0–0 Bd7 10.a4 Qc7 11.Re1 N8e7 12.Nbd2 0–0 13.Nb3+=; B) 7...Qc7 8.bc6 (8.0–0 cb5 9.Bb5 Bd7 10.Bd3 Rc8 11.a4 N8e7 12.Bd2 f6 13.ef6+=; 8.a4 c5 9.Be3 c4 10.Be2 a6 11.ba6 Ra6 12.Bd2 f6 13.ef6=; 8.Be3 cb5 9.Bb5 Bd7 10.Bd3 N8e7 11.0–0 Nf5 12.Nbd2 Rc8 13.c4+=) 8...Qc6 9.0–0 Bd7 10.a4 Rc8 11.a5 Be7 12.Be3 Bb4 13.Ra2+=; C) 7...N8e7 8.h4 (8.a4 c5 9.dc5 Qc7 10.Qe2 Nf5 11.c6 bc6 12.0–0 a6 13.ba6+=; 8.0–0 cb5 9.Bb5 Bd7 10.Bd3 Nc6 11.a3 Be7 12.Be3 Qc7 13.Nbd2=; 8.Nc3 Nf5 9.bc6 bc6 10.Rb1 Ngh4 11.Nh4 Qh4 12.Bf5 ef5 13.0–0=) 8...Nf5 9.bc6 bc6 10.Bf5 ef5 11.h5 Ne7 12.h6 g6 13.Bg5+=; D) 7...cb5 8.Bb5 Bd7 9.Bd3 Rc8 10.0–0 Qc7 11.Bd2 a6 12.a4 N8e7 13.Ra2+=.

6.Nf3 c6 7.Be2 A) 7...Nh4 8.bc6 (8.Nh4 Qh4 9.bc6 bc6 10.0–0 Rb8 11.c3 Bd7 12.Nd2 c5 13.Ba3+=) 8...bc6 9.Nh4 Qh4 10.c3 Ne7 11.Nd2 Rb8 12.Nf3 Qe4 13.Ng5+–; B) 7...Bd7 8.a4 (8.bc6 Bc6 9.0–0 Rc8 10.Bd3 Qc7 11.Nc3 N8e7 12.Rb1 a6 13.Ne2+=; 8.Bg5 f6 9.bc6 Bc6 10.ef6 gf6 11.Be3 Bb4 12.Bd2 Bd6 13.c4=) 8...Nh4 9.Nh4 Qh4 10.0–0 Ne7 11.Ba3 Nf5 12.Bf8 Rf8 13.c3+=; C) 7...N8e7 8.h4 (8.a4 c5 9.c3 Nf5 10.0–0 Be7 11.Bd3 c4 12.Bf5 ef5 13.Ba3+=; 8.0–0 cb5 9.Bb5 Bd7 10.Bd3 Nc6 11.Ba3 Nb4 12.Bg6 hg6 13.c3+=; 8.a3 Bd7 9.Nc3 Nf5 10.0–0 cb5 11.Nb5 a6 12.Nc3 Rc8 13.Qd2=) 8...h5 9.Bg5 cb5 10.Bb5 Bd7 11.Bd3 Qa5 12.Qd2 Qc7 13.0–0+=; D) 7...cb5 8.Bb5 Bd7 9.Bd3 Qb6 10.0–0 Bb5 11.Ba3 Bd3 12.Qd3 N8e7 13.Bc5=.

6.Nf3 f5 7.c4 A) 7...dc4 8.Bc4 N8e7 9.0–0 Nd5 10.Qb3 Be7 11.Nc3 c6 12.bc6 bc6 13.Ba3+/–; B) 7...Be7 8.Nc3 (8.Be2 dc4 9.Bc4 Nh4 10.Nh4 Bb4 11.Bd2 Bd2 12.Nd2 Qh4 13.Nf3+/– 1.06; 8.Bd3 dc4 9.Bc4 Bb4 10.Bd2 Bd2 11.Qd2 N8e7 12.0–0 0–0 13.Nc3+/–) 8...Qd7 9.Be2 dc4 10.Bc4 a6 11.ba6 b6 12.Qb3 Nf8 13.d5+/–; C) 7...Bd7 8.c5 (8.Qb3 c6 9.Nc3 Nh4 10.Nh4 Qh4 11.Be3 Ne7 12.c5 f4 13.g3+/– 1.16; 8.Nc3 Bb4 9.Qb3 Ba5 10.cd5 N8e7 11.de6 Be6 12.Qa3 Bb6 13.Qa4+/–; 8.Bd3 Bb4 9.Bd2 Bd2 10.Qd2 Nh4 11.Nh4 Qh4 12.Qc3 c6 13.Na3+=) 8...N6e7 9.Be2 Ng6 10.0–0 Nh4 11.Nbd2 Nf3 12.Nf3 Ne7 13.a4+–; D) 7...Nh4 8.c5 (8.Nh4 Qh4 9.Nc3 Bb4 10.Qd2 Ne7 11.a3 Ba5 12.c5 a6 13.Be2=) 8...Nf3 9.Qf3 Qh4 10.Be3 Nh6 11.Be2 b6 12.g3 Qg4 13.Nc3+=.

6.Nf3 f5 7.Bd2 A) 7...c6 8.bc6 (8.Be2 cb5 9.Bb5 Bd7 10.Bd3 Rc8 11.0–0 Qc7 12.Nc3 a6 13.a4+=; 8.c4 c5 9.Bc3 cd4 10.Bd4 Bb4 11.Nc3 N8e7 12.a3 Ba5 13.Rc1+=; 8.Bd3 c5 9.h4 cd4 10.h5 N6e7 11.Rh4 a6 12.Rd4 ab5 13.Bb5+=) 8...bc6 9.c4 c5 10.cd5 ed5 11.Nc3 c4 12.Rb1 a6 13.Be2+/–; B) 7...a6 8.h4 (8.Nc3 ab5 9.Bb5 Bd7 10.Be2 c5 11.dc5 Bc5 12.0–0 N8e7 13.Nb5=; 8.ba6 ba6 9.h4 c5 10.h5 N6e7 11.dc5 Nc6 12.Be3 Qc7 13.c4+=; 8.Ng5 N8e7 9.Qh5 ab5 10.Nh7 Kf7 11.Bg5 Qe8 12.a4 Kg8 13.Bb5–+) 8...ab5 9.h5 N6e7 10.Bb5 c6 11.Bd3 b6 12.Qe2 Bb7 13.0–0+=; C) 7...N8e7 8.Bd3 (8.h4 Ng8 9.h5 N6e7 10.Bg5 Qd7 11.Bd3 a6 12.ba6 ba6 13.Nbd2+/–; 8.Be2 Bd7 9.h4 Ng8 10.h5 N6e7 11.Bg5 Rc8 12.0–0 c5 13.bc6+/–; 8.Bg5 h6 9.Be3 a6 10.a3 b6 11.h4 h5 12.Bg5 Qd7 13.Nc3+=) 8...c5 9.dc5 Qc7 10.Qe2 Qc5 11.0–0 Bd7 12.Rc1 Rc8 13.a4+/–; D) 7...c5 8.bc6 bc6 9.Nc3 c5 10.dc5 Bc5 11.Rb1 Bd7 12.Nb5 Rb8 13.Be2+=.

6.Nf3 f5 7.Bd3 b6 (7...a6 8.0–0 (8.Bg5 Be7 9.Be7 N8e7 10.Nc3 ab5 11.Nb5 Bd7 12.0–0 Bb5 13.Bb5=; 8.ba6 ba6 9.0–0 c5 10.c3 Qa5 11.Ba3 Nh6 12.Re1 Nf7 13.Nfd2+=) 8...ab5 9.Bb5 Bd7 10.Be2 c5 11.c4 dc4 12.Bc4 b5 13.Be2+=; 7...N8e7 8.h4 (8.0–0 c5 9.dc5 Qc7 10.Qe1 Ng8 11.c6 bc6 12.Qc3 Bd7 13.a4+=; 8.Bg5 a6 9.ba6 ba6 10.0–0 c5 11.c3 c4 12.Bc2 h6 13.Bc1+=; 8.a3 c5 9.0–0 Qc7 10.c3 c4 11.Be2 Bd7 12.h4 Nc8 13.h5+=) 8...Ng8 9.h5 N6e7 10.Bg5 Qd7 11.Nbd2 b6 12.0–0 c5 13.dc5+/–; 7...Qd7 8.Be3 (8.Bg5 a6 9.ba6 ba6 10.0–0 c5 11.Re1 Rb8 12.c4 cd4 13.Bc2+=; 8.0–0 c5 9.bc6 Qc6 10.a3 Bd7 11.a4 Rc8 12.Ra2 N8e7 13.a5+=; 8.Bd2 a6 9.ba6 ba6 10.0–0 c5 11.c3 Rb8 12.Bg5 h6 13.Be3+=) 8...Bb4 9.c3 Be7 10.Nbd2 Nh6 11.0–0 Ng4 12.Bg5 Bg5 13.Ng5+=; 7...Bd7 8.0–0 (8.Be3 Bb4 9.c3 Be7 10.0–0 c6 11.bc6 Bc6 12.Nbd2 Rc8 13.Qb3+=; 8.a3 Be7 9.0–0 c5 10.c4 Rc8 11.Qe2 dc4 12.Bc4 cd4 13.Nd4+=; 8.a4 c5 9.bc6 Bc6 10.0–0 Qd7 11.a5 Bb5 12.Bb5 Qb5 13.Ba3+=) 8...c5 9.bc6 Bc6 10.Ng5 Qd7 11.Qh5 N8e7 12.Ba3 b6 13.Nh7+/–) 8.0–0 (8.Qe2 c5 9.bc6 N8e7 10.Bg5 h6 11.Be3 Nc6 12.0–0 Be7 13.a3+=; 8.a4 a6 9.Ba3 Nf4 10.Bf8 Kf8 11.Bf1 ab5 12.Qd2 Ng6 13.Bb5+=; 8.Bg5 Be7 9.Be3 a6 10.0–0 ab5 11.Bb5 Bd7 12.Bd3 c5 13.Qd2+=) 8...Bb7 (8...a6 9.Nc3 ab5 10.Bb5 Bd7 11.Be2 Be7 12.Bd2 c5 13.dc5+=) 9.Ng5 Qd7 10.Qh5 N8e7 (10...a6 11.Nh7 Qf7 12.ba6 Ba6 13.Ba6+/–) 11.g4 (11.Ba3 c6 12.Nh7 0–0–0 13.Nf8+/–) 11...fg4? (11...a6 12.Ne6! fg4 13.Nf4+/–) 12.f4 (12.Nh7 0–0–0 13.Bg6 Ng6 14.Qg6 Qb5 15.Nf8 Rdf8 16.Qe6 Kb8 17.Qg4 Rh2 18.c4 (18.Kh2?! Qf1 19.Be3 Rh8 20.Kg3 g5 21.Bg5 Qg1 22.Kf3 Rf8 23.Bf6 Qd1 24.Kg3 Qc2=; 18.Qg7?? Rh1 19.Kh1 Qf1 20.Kh2 Rf2 21.Kg3 Qg1 22.Kh3 Rh2) 18...Qc4 19.Nd2+– (19.Kh2 Qf1 20.Be3 Rh8 21.Kg3 Qg1 22.Kf3 Rf8 23.Bf4 Qh1 24.Kg3 g5 25.Qg5 Qg1 26.Kh4 Rh8 27.Qh6 Qf2 28.Kh5 Rh6 29.Bh6 Qd4–+)) 12...0–0–0+/– 13.Ne6 (13.Nf7!? Nf5 14.Nh8 Nh8 15.Bf5 (15.Qh7?! Nd4 16.Kg2 Nf7=) 15...ef5 16.Qh7+–) 13...Qe6+= 14.f5 Qg8 15.Ba3 (better is 15.fg6!? hg6 16.Qg4 Kb8 17.Bg6+=) 15...Ne5+= 16.de5 g6 17.fg6 hg6 18.Qg4 Nf5 19.Bf8 Rf8 20.Nd2 (20.Bf5? gf5 (20...Rf5?! 21.Rf5 gf5 22.Qg8 Rg8 23.Kf1–/+) 21.Qg8 Rfg8 (21...Rhg8?! 22.Kf2–/+) 22.Kf2 Rh2 23.Ke1 Rgg2 24.Rf5 Rc2–+) 20...Kb8 21.Bf5 (better is 21.Rae1!?+=) 21...gf5–/+ 22.Qg8 Rfg8 (worse is 22...Rhg8 23.Kf2+=) 23.Kf2 Rh2 24.Ke1 Re8 25.Rf5 Bc8 26.Rg5 (better is 26.Nf1 Rc2 27.Rg5–+) 26...Rh1 27.Nf1 Rf8 28.Kd2 Rhf1 29.Rf1 Rf1 30.Rg8 Kb7 31.Re8 Bg4 0–1. Steppuhn,Thomas (2045) – Helsen,S (2075), 3rd Senica Open, 2011.

6.Nf3 f5 7.Be2 A) 7...Nh4 8.0–0 (8.Nh4 Qh4 9.0–0 Bd7 10.a4 Be7 11.a5 c5 12.bc6 Bc6 13.Na3+/–) 8...Nf3 9.Bf3 Qh4 10.Qd3 a6 11.c4 ab5 12.cd5 ed5 13.Bd5+/–; B) 7...Bd7 8.0–0 (8.a4 c5 9.bc6 Bc6 10.0–0 Rc8 11.a5 Be7 12.Bd2 Qd7 13.Nc3+=; 8.c4 dc4 9.Bc4 Bb4 10.Bd2 Bd2 11.Nbd2 a6 12.ba6 b5 13.Bb3+=; 8.Bg5 Be7 9.Be7 N8e7 10.0–0 Nf4 11.Nbd2 0–0 12.Rb1 Qe8 13.a4+=) 8...c5 9.c4 dc4 10.Bc4 Qb6 11.a4 cd4 12.Bb2 Qc7 13.Qd4+/–; C) 7...a6 8.ba6 ba6 9.0–0 c5 10.c4 dc4 11.Bc4 cd4 12.Nd4 Ne5 13.Ne6+=; D) 7...Qd7 8.Bd3 (8.a4 a6 9.0–0 ab5 10.Bb5 c6 11.Bd3 b6 12.Qe2 Bb4 13.Rd1+=; 8.0–0 a6 9.ba6 b6 10.a7 Ra7 11.Bg5 c5 12.Nc3 Ba6 13.Ba6+=; 8.c3 a6 9.Qa4 b6 10.Bg5 Bb7 11.Qb3 Be7 12.Nbd2 Bg5 13.Ng5=) 8...b6 9.Qe2 Bb4 10.c3 Be7 11.0–0 Bb7 12.a4 c5 13.Bg5+=.

6.Nf3 Nh4 7.a3 A) 7...a6 8.Nh4 (8.ba6 ba6 9.Nbd2 c5 10.Nh4 Qh4 11.c3 cd4 12.Qa4 Bd7 13.Qd4=; 8.Be3 Nf3 9.Qf3 Ne7 10.Bd3 ab5 11.Bb5 c6 12.Bd3 Nf5 13.0–0=; 8.c3 ab5 9.Bb5 Bd7 10.Bd7 Kd7 11.0–0 Nf3 12.Qf3 Ke8 13.Nd2=) 8...Qh4 9.Nc3 ab5 10.Nb5 Qd8 11.Qg4 Bd7 12.Rb1 Ra5 13.Bd2+=; B) 7...Bd7 8.Bf4 (8.Be3 Nf5 9.Bd2 Nh4 10.Bb4 Bb4 11.ab4 Nh6 12.c3 Nf3 13.Qf3+=; 8.Nbd2 Nh6 9.Nh4 Qh4 10.Nf3 Qe4 11.Qe2 Nf5 12.c3 c5 13.Qe4+=; 8.Ra2 Rc8 9.Be3 Nf5 10.Bg5 Be7 11.Be7 Nge7 12.Rb2 c5 13.bc6+=) 8...c5 9.bc6 Bc6 10.Nbd2 Ng6 11.Be3 Qa5 12.Qc1 Qc3 13.Bd3+=; C) 7...Rb8 8.Ra2 (8.Be3 Nf3 9.Qf3 c6 10.bc6 bc6 11.c4 Ne7 12.Bd3 dc4 13.Bc4=; 8.Nbd2 c5 9.Nh4 Qh4 10.Nf3 Qe4 11.Qe2 Bd7 12.c3 cd4 13.cd4+=; 8.Bd2 c5 9.Nh4 Qh4 10.Be3 Ne7 11.Bd3 c4 12.g3 Qh3 13.Bf1=) 8...Nf3 9.Qf3 c5 10.dc5 Bc5 11.Qg3 g6 12.Bd3 Bd7 13.0–0+=; D) 7...Nf3 8.Qf3 Ne7 9.Bd3 c5 10.bc6 Nc6 11.c3 Bd7 12.0–0 Rc8 13.Qh5=.

6.Nf3 Nh4 7.Bd2 A) 7...Bd7 8.Bf4 (8.a3 c5 9.bc6 Bc6 10.Bb4 Nf3 11.Qf3 Ne7 12.Bd3 Qb6 13.Qg4=; 8.Be3 Nf5 9.Bg5 f6 10.Bd2 fe5 11.Bg5 Nf6 12.de5 h6 13.Bf4=; 8.c3 c5 9.bc6 Bc6 10.Nh4 Qh4 11.Bd3 Rc8 12.Qf3 Ba4 13.0–0=) 8...Rc8 9.Nbd2 c5 10.bc6 Bc6 11.Nh4 Qh4 12.Qf3 Ba4 13.c4+=; B) 7...h6 8.Nc3 (8.a4 Nf3 9.Qf3 Ne7 10.Bd3 Nf5 11.c3 a6 12.ba6 ba6 13.0–0+=; 8.c3 Bd7 9.Nh4 Qh4 10.Bd3 c5 11.bc6 Bc6 12.Be3 Ne7 13.Qf3+=; 8.a3 Bd7 9.Bb4 Nf3 10.Qf3 Ne7 11.Bd3 c6 12.bc6 Nc6 13.c3+=) 8...Ba3 9.Rb1 Bd7 10.Rb3 Bf8 11.a4 Nf3 12.Qf3 Qh4 13.Be3+/–; C) 7...Rb8 8.Nc3 (8.a3 c5 9.Nh4 Qh4 10.Be3 Ne7 11.Bd3 c4 12.g3 Qh3 13.Bf1=; 8.Nh4 Qh4 9.c3 Bd7 10.Bd3 c5 11.bc6 Bc6 12.Be3 Nh6 13.Qf3=; 8.c3 Nf3 9.Qf3 c5 10.bc6 bc6 11.Be3 Qa5 12.a3 Ba6 13.Ba6=) 8...Nf3 9.Qf3 c5 10.dc5 Bc5 11.Qg3 g6 12.Na4 Be7 13.c4+=; D) 7...a6 8.Nc3 (8.ba6 ba6 9.Be3 Nf5 10.Bg5 f6 11.ef6 gf6 12.Ne5 Bb7 13.Qh5+=; 8.c3 Bd7 9.ba6 ba6 10.Be3 Nf3 11.Qf3 Qb8 12.Bc1 c5 13.Nd2=; 8.Be3 ab5 9.Nh4 Qh4 10.Bb5 Bd7 11.Bd7 Kd7 12.0–0 Ne7 13.Nd2+=) 8...Nf3 9.Qf3 ab5 10.Bb5 Bd7 11.Bd3 Qh4 12.Qe3 Nh6 13.Rb1+=.

6.Nf3 Nh4 7.Be3 A) 7...Nf5 8.Bf4 (8.Bg5 f6 9.Bd2 fe5 10.Bg5 Qd6 11.de5 Qb4 12.Bd2 Qe4 13.Be2=; 8.Bd2 Nh4 9.c3 Bd7 10.Nh4 Qh4 11.Bd3 c5 12.bc6 Bc6 13.Be3=; 8.Bd3 Ne3 9.fe3 Ne7 10.0–0 Bd7 11.Qe2 c5 12.c4 Rc8 13.Nbd2+=) 8...Be7 9.c3 g5 10.Bc1 h5 11.Bd3 g4 12.Nfd2 f6 13.0–0+=; B) 7...Nf3 8.Qf3 Ne7 9.Bd3 Nf5 10.0–0 Be7 11.Nd2 Qd7 12.Nb3 Ne3 13.fe3+=; C) 7...a6 8.Nh4 (8.ba6 ba6 9.Nh4 Qh4 10.c4 Ne7 11.Bd3 dc4 12.g3 Qh3 13.Bf1=; 8.Nbd2 Nf5 9.Bf4 ab5 10.Bb5 Bd7 11.Bd3 Ra4 12.c3 c5 13.Bc2+=) 8...Qh4 9.ba6 ba6 10.Nd2 Bb4 11.c4 c5 12.cd5 ed5 13.dc5+=; D) 7...Bd7 8.Nh4 (8.a4 Nf5 9.Bg5 f6 10.Bd2 a6 11.ba6 ba6 12.g4 Nfh6 13.ef6=; 8.Nbd2 Nf5 9.Bd3 Ne3 10.fe3 Ne7 11.0–0 Nf5 12.Qe2 c5 13.c4+=; 8.a3 Nf5 9.Bd2 Nh4 10.Bf4 Nf3 11.Qf3 Ne7 12.Bd3 c6 13.bc6=) 8...Qh4 9.Bd3 Nh6 10.Qf3 Ng4 11.Bf4 Nh6 12.0–0 c5 13.bc6+=.

6.Nf3 Nh4 7.Bf4 A) 7...Nf3 8.Qf3 Ne7 9.Bd3 c6 10.a4 Bd7 11.Nc3 Ng6 12.0–0 Nf4 13.Qf4+=; B) 7...Rb8 8.Nbd2 (8.a3 c5 9.Nh4 Qh4 10.Be3 Ne7 11.Bd3 c4 12.g3 Qh3 13.Bf1=; 8.Nh4 Qh4 9.g3 Qd8 10.Be2 Ne7 11.0–0 c5 12.c3 Ng6 13.Be3=; 8.c3 c5 9.Nbd2 Nf3 10.Nf3 Qa5 11.Qd2 c4 12.a4 a6 13.Qb2=) 8...c5 9.bc6 bc6 10.Rb1 Nf3 11.Nf3 Rb6 12.Bd3 Ba6 13.Rb6+=; C) 7...Ng6 8.Bd2 (8.Bg5 f6 9.Bd2 fe5 10.de5 Bc5 11.Nc3 N8e7 12.Na4 Ba3 13.c4+=; 8.Be3 N8e7 9.Bd3 Nf5 10.Bg5 Be7 11.Be7 Qe7 12.0–0 Qb4 13.Qe1+=) 8...Nh4 9.a3 Nf3 10.Qf3 Ne7 11.Bd3 c6 12.a4 Qb6 13.c3+=; D) 7...Bd7 8.Nbd2 (8.Be3 c6 9.bc6 Bc6 10.Nh4 Qh4 11.Bd3 Nh6 12.0–0 Be7 13.Nd2+=; 8.a3 c5 9.bc6 Bc6 10.Nbd2 Ng6 11.Be3 Qa5 12.Qc1 N8e7 13.Bd3+=; 8.a4 c5 9.bc6 Bc6 10.Nh4 Qh4 11.Qd2 Rc8 12.Be2 Ne7 13.Nc3=) 8...c6 9.bc6 Bc6 10.Rb1 Ng6 11.Be3 Qa5 12.Rb2 Bb4 13.Bd3+=.

3.e4 Nf6

4.Bb2 e5 5.Nf3 d5 6.Ne5 (6.Be5 de4 7.b6 ef3–+) 6...de4 7.f3 (7.Ng6 hg6 8.d3 Bf5=) 7...Bd6 8.Ng6 hg6 9.Qe2 Nf6 10.h3 (10.Nc3 Bg3 11.Kd1 A) worse is 11...Bh2 12.g3+/– (12.fe4?? Bg4–+); B) worse is 11...Rh2 12.Ne4 Ne4 13.Rh2 Bh2 14.Qe4 Kf8 15.Kc1+=; C) 11...Be6=) 10...0–0 (10...Rh4 11.Nc3 Qe7 12.fe4 Bg3 13.Kd1–+) 11.Nc3 (better is 11.fe4!? Bg3 12.Kd1+=) 11...Nh5 (better is 11...ef3!? 12.Qf3 Re8 13.Be2 a6=) 12.Qc4?? (12.Ne4 Ng3 13.Ng3 Bg3 14.Kd1–+) 0–1. Weber – Rohde,Friedhelm, corr priv, 1995.

4.d4 Ng6 5.e5 Nd5 6.h4 e6 7.h5 Ngf4? (better is 7...Nge7=) 8.c4+– Nb4?? (8...d6 9.cd5 de5+–) 9.Bf4 g6 (9...d6+–) 10.a3 a5 (10...g5 11.Bd2 c5 12.ab4 cd4 13.Qg4+–) 11.ab4 Bb4 12.Bd2 gh5 (12...Bd2 13.Qd2 d6+–) 13.Bb4 ab4 14.Ra8 b6 15.Qa4 (15.Qh5 Rg8+–) 15...0–0 16.Nf3 f6 17.Nbd2 fe5 18.Qb4 d6 19.de5 de5 20.Rh5 Rf4 21.Rc8! Qc8 (21...Qc8 22.Rg5 Double attack) 22.Qe7 h6 (22...Rf5 23.Rg5 Rg5 24.Ng5 Qe8 25.Qe8 Kg7 26.Qf7 Kh6 27.Nde4 c6 28.Qh7) 23.Ne5 (23.Rh6 Rg4 24.Qh7 Kf8 25.Rf6 Ke8 26.Qf7 Kd8 27.Qf8 Kd7 28.Ne5) 23...Qf8 (23...Qd8 24.Qd8 Rf8 25.Qc7 Rf6 26.Rh6 Rh6 27.Qf7 Kh8 28.Qf8 Kh7 29.Bd3 Rg6 30.Bg6) 24.Qe6 Kg7 (24...Qf7 25.Nf7 Kg7 26.Nh6 Kf8 27.Rg5 Re4 28.Ne4 c6 29.Qf7) 25.Qh6 Kg8 26.Qh7 1–0. Offenbach/Holaus,Verena (2285) – Teske,Heike (2170), remoteschach.de, 2006.

4.f4+/– Ng6

5.f5 Ne5 6.d4 Ne4 7.de5 d5 (7...g6 8.Bb2 Bg7 9.fg6 hg6 10.Bc4 Nd6 11.Bd3 Nf5) 8.e6! fe6 (8...Qd6 9.ef7 Kf7 10.Nd2+/– Qe5 11.Ne4 Bf5) 9.Qh5 g6 (9...Kd7 10.Bd3 ef5 (10...g6 11.fe6 Ke6) 11.Be4 (11.Qf5?! e6 12.Qf7 Qe7+/–) 11...de4 12.Qf5 Ke8 13.Qe4+–) 10.fg6 Kd7 (10...Bg7 11.gh7 Kd7 12.c3+–) 11.Qe5 (11.Bb2 Nf6 12.Qg5 Bg7+–) 11...Nf6 12.Nc3 (12.Nf3 Bg7+–) 12...hg6 13.Nf3 Bg7 14.Ng5 (14.Bd3 Qg8 15.Qg3 Ne4 16.Ne5 Be5 17.Qe5 Rh5+–) 14...Ke8 (14...Qg8 15.Bf4 Ne8 16.Qe3+–) 15.Bd3 (15.Ne6?! Be6 16.Qe6 Qd7 17.Qd7 Kd7+–) 15...Rh6 (15...Qd6 16.Bg6 Kf8 17.Qd6 ed6+–) 16.Ne6 Be6 17.Bh6 Bh6 18.Qe6 Qb8 (18...Qd7 19.Bg6 Kd8+–) 19.Bg6 (19.Nd5 Ng8 20.Nf6 Nf6 21.Bg6 Kd8 22.Rd1 Bd2 23.Rd2 Nd5 24.Rd5) 19...Kd8 20.Nd5 c6 (20...Ne4 21.Qe7 Kc8 22.Bf5) 21.Qe7 1–0. marre – pxzs, internet, 2010.

5.f5 Ne5? 6.d4+– Neg4 7.e5 Nf2? (better is 7...e6+–) 8.Kf2 Ne4 9.Ke1 d5 10.e6! fe6 11.Qh5 g6 (11...Kd7 12.fe6 Ke6 13.Bd3+–) 12.fg6 Bg7 13.gh7 Kd7 14.Nf3 Qf8 15.Be3 Kd8 (15...Qf5 16.Qf5 ef5 17.c4+–) 16.Bd3 Nf6 17.Qg6 Rh7 (17...Bd7 18.Qg3 Nh7 19.Bf4+–) 18.Ng5 Rh5 19.Nf7 Ke8 20.Ne5 Kd8 21.Nd2 (21.Bg5!? Rh7+–) 21...Bd7 22.Nd7 Kd7 23.Nf3 Rd8 (23...Kc8 24.Ne5+–) 24.Ne5 Kc8 25.Ke2 (25.Bg5 Rh7+–) 25...Bh6 26.Bh6 Rh6 27.Qf7 Nh5 28.Qf8 Rf8 29.g4 (29.g3 Nf6+–) 29...Nf4 30.Kd2 Nh3 (30...Nd3 31.Kd3 Rh3 32.Ke2+–) 31.Raf1 Rf2 32.Rf2 Nf2 33.Rf1 Rh2 (33...Rf6 34.Be2+–) 34.Ke3 Ng4 35.Ng4 Rh4 (35...Rh3 36.Rf3 Rf3 37.Kf3 c6+–) 36.Rf8 Kd7 37.Ne5 Kd6 38.Rd8 1–0. Csonka,Attila Istvan (2360) – Frink,Ferenc (2185), Zalakaros op, 2005.

5.f5 Nf4 6.d3 (6.d4 Ne4 7.Bf4 d5+–) 6...g5? (better is 6...e5=) 7.g3+– N4h5 8.e5 (8.Bg5?! Rg8 9.Nf3 d5+/–) 8...Nd5? (8...d5 9.Bg5 Rg8 10.Bf6 Nf6 11.ef6 Bf5 12.fe7 Qe7 13.Qe2 Bg7+–) 9.Qh5 e6 (9...Nb4 10.Na3 c6 11.Nf3+– (11.Bg5?! Qa5 12.Nc4 Nd3 13.Ke2 Qc3+–)) 10.Bg5 (10.Bg5 Be7 11.fe6 de6 12.Nf3+–) 1–0. Pagano,Nunzio – Jagt,Aaron, corr or02–021, 2003.

5.f5 Nh4!? 6.d3 d5 +/–.

5.f5 Nh4 6.d3 h6 +/–.

3.e4 Ng6

4.Bb2 e5 5.Nf3 d5 6.Ne5 (6.Be5 de4 7.b6 ef3–+) 6...de4 7.f3 (7.Ng6 hg6 8.d3 Bf5=) 7...Bd6 8.Ng6 hg6 9.Qe2 Nf6 10.h3 (10.Nc3 Bg3 11.Kd1 A) < 11...Bh2 12.g3+/– (12.fe4?? Bg4–+); B) < 11...Rh2 12.Ne4 Ne4 13.Rh2 Bh2 14.Qe4 Kf8 15.Kc1+=; C) 11...Be6=) 10...0–0 (10...Rh4 11.Nc3 Qe7 12.fe4 Bg3 13.Kd1–+) 11.Nc3 (better is 11.fe4!? Bg3 12.Kd1+=) 11...Nh5 (better is 11...ef3!? 12.Qf3 Re8 13.Be2 a6=) 12.Qc4?? (12.Ne4 Ng3 13.Ng3 Bg3 14.Kd1–+) 0–1. Weber – Rohde,Friedhelm, corr priv, 1995.

4.c4 d6= 5.d4 cd4 6.Qd4 Nf6 7.f4 Ng6 8.Nf3 Bg4 9.Be2 (9.f5 Ne5 10.Ne5 de5 11.Qd8 Rd8+=) 9...Bf3 (9...e5 10.fe5 de5 11.Qd8 Rd8 12.Bg5+=) 10.Bf3= e5 11.fe5 de5 12.Qd8 Rd8 13.Bg5 (13.Be3 Rc8 14.Nd2 Bc5=) 13...Bc5 (13...Rd4 14.Bf6 Bb4 15.Ke2 gf6 16.Rc1+=) 14.Nd2= 0–0 (14...Ke7 15.Nb3 Rc8 16.Rc1=) 15.0–0–0 Rd6 16.h4 (16.Nb3 Rc8=) 16...h6 17.Bf6 gf6 (17...Rf6 18.Nb3 Rc8 19.Kb2= (worse is 19.Nc5 Rc5 20.Be2 Rf2+=)) 18.Nb3 Be3 (18...Rc8 19.h5 Nf4 20.g3 Nd3 21.Kb1+=) 19.Kc2+= Rfd8 (19...Rd1 20.Bd1 Rd8 21.g3+=) 20.h5 Nf4 21.Rd6 Rd6 22.Rd1 Rd1 23.Kd1 Ne6 24.Ke2 Bb6 25.Kd3 (25.Bg4 Kf8+/–) 25...Nc5 26.Kc3 Nb3 ½–½. sportsmaniac (2290) – materialkiller (2285), net–chess.com, 2007.

4.Nf3 d6 +=.

3.f4 Ng6

4.d4 d5 5.Nf3 Nf6 6.e3 Bf5 (6...Bg4 7.Be2+=) 7.Bd3= e6 8.0–0 Bd6 9.c4 Bd3 (9...dc4 10.Bc4 0–0 11.Ne5=) 10.Qd3 dc4 11.Qc4 0–0 12.Nc3 (12.Ne5 a6=) 12...Qe7 (12...c6 13.Bd2=) 13.Ne5 a6 14.Rb1 ab5 15.Rb5 c6 16.Rb3 (16.Ng6 hg6 17.Rb3 Rfd8=) 16...Rfc8 (16...Rfd8 17.Ng6 fg6 18.e4+=) 17.a4 (17.Ng6 hg6 18.e4 b5=) 17...c5 18.Qb5 Attacks the backward pawn on b7 18...cd4 (18...Nd5 19.Ng6 hg6 20.a5=) 19.ed4 Nh4 20.Ne2 (20.Bd2 Rc7=) 20...Rc2 21.Rc3 (21.Rb2!? Rb2 22.Bb2+=) 21...Ra2–/+ 22.g3 Nf5 23.Bb2 (23.g4!? Be5 24.gf5–/+) 23...Bb4–+ (worse is 23...R2a4 24.Rfc1–/+) 24.Rb3 (24.Rc2 Ne3 (24...R2a4?! 25.Rfc1–+) 25.Nc1 R2a4–+ (25...Nc2?! 26.Na2 Ra5 27.Qe2 Ra4 28.Nb4 Nb4 29.Rc1–/+)) 24...Nd5 (24...R8a4 25.Rc1 Nd6 26.Qb6–+) 25.Ra1 Ra1 (25...Nd6 26.Qd3 R8a4 27.Ra2 Ra2 28.Nc3 Bc3 29.Bc3–+) 26.Ba1 Ra5 (26...Nd6 27.Qd3–+) 27.Qc4 b5! 28.Qc8 (28.Qb5 Rb5) 28...Qf8 29.Qd7 (29.Qf8 Kf8 30.Nd3 Ra4 31.Bb2–+) 29...ba4 30.Rb1 a3 31.g4 (31.Nc6 Nf6 32.Qb7 Bd2 33.Na5 Ba5=) 31...Nfe3 32.Nc6 Ra8 (32...Nf6 33.Qb7 Bd2 34.Na5 Ba5 35.Qb5–/+) 33.f5 (33.Nb4 Nb4 34.f5 ef5 35.gf5 a2–+) 33...ef5 (33...a2 34.Rb2 Bd6 35.Ne5–+) 34.gf5 (34.Nb4 Nb4 35.gf5 a2–+) 34...Bd6 (34...a2 35.Rb2–+) 35.Nc3 (35.Ng3 Nf6 36.Qb7 Bg3 37.Ne7 Kh8 38.hg3 Re8–+) 35...Nc3 (35...Nf6 36.Qb7–+) 36.Bc3 a2 Do you see the mate threat? 37.Rc1 Ra3 38.Ba1 Rb3 39.Ne5 (39.Kh1 Rb1 40.Rg1–+) 39...Rb1 40.Nd3 Ba3 (40...Ba3 41.Re1 Bb4–+) 0–1. Bungo,G – Wist,A, corr ICCF cp, 1994.

4.f5 Ne5 5.d4+= Nc4 6.e4 Nd6 7.Qd3 (better is 7.Bd3 e6 8.Qe2+=) 7...Nf6?? (7...e6 8.Bf4 Nf6 9.Bd6 Bd6+–) 8.e5+– Nd5 (8...Nf5 9.ef6 d5+–) 9.ed6 ed6 10.Be2 (10.Nf3 Be7+–) 10...Qh4 11.Kf1 (better is 11.Kd1 Ne7+–) 11...b6?! (11...Ne7 12.Qe3+–) 12.Nf3 (12.Bf3 c6+–) 12...Qe7 13.Bd2 (13.Kf2 a6+–) 13...Bb7 (13...a6 14.Kf2 Nf6 15.Nc3+–) 14.c4 Nf6 15.Nc3 0–0–0 16.a4 Re8 17.a5 h6 18.a6 Ba8 19.d5 Ng4 20.h4 Kb8 21.h5 Kc8 22.Rb1 Kb8 23.Rb4 Qf6 24.Nd4 Ne5 25.Qe3 g5 26.Ne4 Qd8 27.f6 Rg8 28.g4 Qc8 29.Rg1 Qd8 30.Rg3 Rh8 31.Bc3 Rg8 32.Rb3 Qc8 33.Rb4 Qd8 34.Rb3 Qc8 35.Rb4 Qd8 36.Rb3 ½–½. Golem_01 – Light_154, computer chess game, 2001.

4.f5 Ne5 5.d4 Nc4 6.e4 Nd6 7.Qd3 Nf6 8.e5 Nd5 9.ed6 ed6 10.Be2 Qh4 11.Kf1 b6 12.Nf3 Qe7 13.Bd2 Bb7 14.c4 Nf6 15.Nc3 0–0–0 16.a4 Re8 17.a5 h6 18.a6 Ba8 19.d5 Ng4 20.h4 Kb8 21.h5 Kc8 22.Rb1 Kb8 23.Rb4 Qf6 24.Nd4 Ne5 25.Qe3 g5 26.Ne4 Qd8 27.f6 Rg8 28.g4 Qc8 29.Rg1 Qd8 30.Rg3 Rh8 31.Bc3 Rg8 32.Rb3 Qc8 33.Rb4 Qd8 34.Kg2 c5 35.bc6 dc6 +–. Golem_01 – Light_154, computer chess game, 2001.

4.f5 Nf4 5.g3 Nd5 6.c4 Nb6 7.c5 Nd5 8.e4 Ndf6 9.e5 Nd5. Aasum.

4.f5 Nh4 5.e4 d5 =.

2.c3 a5

3.a3 ab4–/+ 4.cb4 e6 (4...Nb4!? 5.Bb2 Nc6–/+) 5.Bb2= Nb4?? (better is 5...d5=) 6.ab4+– Ra1 7.Ba1 Bb4?? (7...Nf6 8.Qa4+–) 8.Bc3 (better is 8.Bg7 b6 9.Bh8+–) 8...Bc3+/– 9.Nc3 Qf6 10.e3 Ne7 11.Nf3 c6 (11...0–0 12.d4+–) 12.Be2 (12.Ne4 Qb2 13.Nd6 Kf8+–) 12...b5 (12...e5 13.d4 ed4 14.Nd4+–) 13.Qb1 (better is 13.Ne4 Qb2 14.Nd6 Kf8 15.Ng5+–) 13...b4?? (13...0–0 14.0–0+–) 14.Na2 (better is 14.Ne4 Qg6 15.Nd6 Kf8 16.Qb4+–) 14...Qg6 (14...c5 15.d4 d6 16.dc5 dc5 17.Qc2 Qa1 18.Bd1+–) 15.Qg6 fg6 (15...Ng6 16.Nb4 c5 17.Nc2+–) 16.Nb4 0–0 (16...c5 17.Nc2+–) 17.Nd3 (17.d4 Bb7+–) 17...Bb7 (17...d6 18.Nb2+–) 18.Bd1 (18.Nc5 Bc8+–) 18...c5 (18...Ra8 19.Nc5 Bc8 20.d4+–) 19.0–0 (better is 19.Nc5 Bc6+–) 19...Bf3 20.Bf3 Nf5? (20...d6 21.Rb1+–) 21.Rc1 (21.Nc5!? Rd8+–) 21...d5? (21...d6+–) 22.Rc5 d4 (22...Rb8 23.Kf1 Kf7 24.Ne5 Ke8 25.Rc7+–) 23.e4 Ne3 (23...Nh6+–) 24.fe3 de3 25.de3 e5 (25...Re8 26.e5+–) 26.Rc1 (26.Ne5 Re8+–) 26...Rb8 (26...Re8 27.Bd1+–) 27.Rd1 (better is 27.Ne5 Re8 28.Nc6+–) 27...Rb4 (27...Rb5+–) 28.Nb4 Kf7 29.Nd5 (29.Rd7 Kg8+–) 29...h5 30.h3 g5 31.Kf2 (31.Bh5!? g6 32.Bg4 Kg7+–) 31...g4 32.hg4 hg4 33.Bg4 1–0. Fournier,Frederic (1895) – jajaraja (1630), Active blind, 2011.

3.a3 Ne5 4.e3 Ra6?? 5.Ba6+– ba6 6.d3 d5 7.d4 Nc4 8.Nd2 Nf6? 9.Nc4 (9...dc4 10.Qa4 Qd7 11.Qa5+–) 1–0. chsen – kings, internet, 2006.

3.ba5 Na5 4.e4 b6 5.Nf3 Ba6 6.Ba6+= Ra6 7.0–0 Nc4 8.Qe2 b5 9.a4 Ra4? 10.Ra4+– ba4 11.Qc4 Qb8 12.Ba3 e6 13.Bf8 Kf8 14.Qa4 Nf6 15.Ne5 Qe8 16.d3 d6 17.Nc6 g5 18.Nd2 d5 19.e5 Ng4 20.d4 h5 21.Nf3 h4 22.Ng5 f5 23.Qb4 Kg7 24.Ne7 f4 25.Ne6 Kf7 26.Ng5 Kf8 27.Nd5 Kg7 28.Nc7 Qd7 29.Nce6 Kg6 30.Qb6 Re8 31.Nf8 Kg5 32.Nd7 Ra8 33.h3 Nh6 34.Qf6 Kh5 35.Qf4 Ra7 36.Nf6 Kg6 37.Qh4 Kg7 38.Qg5 Kf7 39.Qh6 (39...Ke7 40.Qg7 Kd8 41.Qa7 Kc8 42.h4 Kd8 43.Qd7#) 1–0. Rob (1630) – jaunis111, internet, 2007.

3.b5 Na7 4.c4 e6 5.e4 c6 6.bc6 bc6 7.d4 d5 8.e5 Ba6 9.Nd2 dc4 10.Nc4? (better is 10.Ngf3=) 10...Bb4–+ 11.Bd2 Bc4 12.Bc4 Qd4 13.Rc1 Qe5 14.Ne2 Rd8 15.0–0 (15.Rc2 Qe4 16.Ba6 Qg2 17.Ng3–+) 15...Bd2 0–1. Hammi.Bogart – byron_de, ChessWorld.net, 2003.

3.b5 Ne5

4.a4 d5 5.d4 Ng6 6.Nf3 =.

4.a4 e6 5.f4 Nc4 6.Nf3 Bc5 7.d4 Bd6 8.Qb3 Nb6+= 9.e3 Nf6 10.c4 c5 11.bc6+/– Bb4 12.Bd2 Ne4? 13.Bb4+– ab4 14.Qb4 bc6 15.Bd3 Nd6?? 16.Qd6 Na4 17.Qe5 Qa5 18.Nbd2 Qe5 19.fe5 0–0 20.0–0 Bb7 21.Rfb1 Nc3 22.Rb7 Ra1 23.Kf2 Rd8 24.h3 Nd1 25.Ke2?? f6?? 26.ef6 gf6 27.g4 Rda8? 28.Rd7 R8a3 29.Rd6 Nb2?? 30.Ne1 Rd3?? 31.Nd3 Na4 32.Rc6 Rh1 33.Re6 Rh3 34.Rf6 Nc3 35.Kf2 Rh2 36.Ke1 Re2 37.Kf1 Rd2 38.Ne5 Rd1 39.Kf2 Rd2?? 40.Kf3+– Kg7 41.g5 Rd1 42.Kf4 Rf1 43.Nf3 Ne2 44.Ke4 Ng3 45.Kd5 Nh5 46.Rf5 Ng3 47.Rf4 Kg6 48.c5 Ne2 49.Rf6 Kh5 50.c6 Nc3 51.Ke6 Ne4 52.Rf7 Nc5 53.dc5 Rc1 54.c7 Rc5 55.Kd6 (55...Rc7 56.Rc7+–) 1–0. alanwsp (1755) – pjp, net–chess.com, 2004.

4.d3 d5 5.d4 Nc4 6.e3 Nf6 7.Be2 h5 8.Bc4 e6?? (better is 8...dc4 9.Qa4 Qd5=) 9.Be2 c6 10.Nd2 cb5 11.Bb5 Bd7 12.Bd7 Qd7 13.h3 (13.Ngf3 b5+–) 13...g5 (13...Rc8 14.Ne2+–) 14.Ne2 b5 15.0–0 e5 (15...g4 16.h4 Be7+–) 16.de5 Ne4 17.Ne4 de4 18.Bd2 (18.Ng3 Qe6+–) 18...Ra6 (18...g4 19.h4 Bg7 20.Nd4 Be5 21.Rb1+–) 19.Nd4 Rhh6 (19...Bg7 20.Qc2 g4 21.h4+–) 20.Qe2 Qd5 (20...g4 21.Qb5 (worse is 21.Nb5 gh3 22.g3 h4+–) 21...Qb5 22.Nb5+–) 21.Nb5 (21.Rfb1 Rab6 22.e6 b4+–) 21...Rac6 22.Na7 (22.Nd4 Rc5+–) 22...Ra6 (22...Rc7 23.Qb5 Rd7 24.Qa4+–) 23.c4 Qe5 24.Nc8 (better is 24.Nb5+–) 24...Rac6 25.Na7 Rc5?? (25...Ra6 26.Nb5 g4+–) 26.Nb5+– Rhc6 (26...g4 27.h4 Rhc6+–) 27.Na7 (better is 27.Bc3 Qe7 28.Ba5 Rc4 29.Rad1+–) 27...Rc7?? (27...Rh6 28.Rad1+–) 28.Nb5 R7c6 29.Nd4 (29.Bc3!? Qe7 30.Ba5 Rc4 31.Qh5 Qc5+–) 29...Bd6 30.Nc6 (30.g3 Rc8 31.Rfc1 h4+–) 30...Rc6 (30...Qh2) 31.Ba5 Qh2# 0–1. blanco2003 – pjc49, ChessWorld.net, 2012.

4.Nf3 Nf3 5.ef3 d5 6.d3 e6 7.Be2 Bd6 8.a4 Nf6 9.0–0 0–0 10.Bg5 c5 11.c4 Be5 12.Ra2 Qc7 13.cd5 Bh2 14.Kh1 Be5 (14...ed5 15.Bf6 Qf4 16.Qd2 Qf6 17.Kh2+/–; 14...Nd5?! 15.g3 Bg3 16.fg3 Qg3 17.Bc1=+) 15.g3 Nd5 16.Qc1 Bd4 17.f4 h6 18.Bh4 f6 19.Bh5 (19.f5–+) 19...g5 20.fg5 fg5 21.Bg5 Rf5 22.Bf7 (22.Nd2 Rg5 23.Bf3–+) 22...Qf7 23.Bh6 (23.Bh4 Ne3! 24.Re2 Nf1 25.Qf1–+) 23...Qh5 24.Kg1 Qf3 25.Nd2 Qg3 0–1. Geordiedazza – byron_de, ChessWorld.net, 2003.

2.c3 a6

3.Bb2 e5+= 4.e3 (4.Na3+=) 4...b5 (4...d5 5.d3+=) 5.g3 (better is 5.a4 ba4 6.d4=) 5...Nb4?? (better is 5...Bb7 6.f3 Nf6+=) 6.cb4+– Bb7 7.Nf3 (7.f3 Bb4 8.a4 f6 9.ab5 ab5 10.Bb5 Rb8+–) 7...Qf6 (7...e4 8.Nd4 Nf6+–) 8.Bg2 d6 (8...Bd6 9.0–0+–) 9.0–0 Be7 (9...a5 10.Qe2 c6 11.ba5+–) 10.d4 (10.a4 Nh6+–) 10...e4 11.Nfd2 (11.Ne1 d5 12.f3 ef3+–) 11...d5 12.f4 (12.f3!? Qh6+–) 12...Bb4 13.Bc3 (13.a4 Be7+/–) 13...Bc3 (13...Be7 14.Nb3+/–) 14.Nc3 Nh6 (14...Ne7 15.Nb3+/–) 15.Qh5 (15.Qb3 Rd8+/–) 15...Rd8 (15...Nf5 16.Rae1+/–) 16.g4 (16.Bh3 c5 17.Nb3 cd4 18.Nd4 0–0+–) 16...Qe7 17.g5 (17.Rac1!?+/–) 17...Nf5+= 18.Bh3 (18.Nd1 g6 19.Qe2 h6+=) 18...g6 (better is 18...Ne3!? 19.Rfc1 c5+=) 19.Qe2+= c5 (19...h6 20.Bf5 gf5 21.Qh5+=) 20.dc5 (20.Nb5 Rc8 21.Rfc1 ab5 22.Qb5 Bc6 23.Rc5 Qd6+–) 20...Qc5 21.Rac1?? (better is 21.Bf5 Qc3 22.Rac1+/–) 21...Qe3+= 22.Qe3 Ne3 23.Rfe1 d4 (better is 23...Nc4!? 24.Nb3 h6+=) 24.Nce4+/– 0–0 (better is 24...h6!? 25.Nf6 Kf8+/–) 25.Nc5 Bd5 (25...Bc8 26.Bc8 Rc8 27.Na6+–) 26.Na6 (26.Nd7 f5 27.Nf8 Kf8+–) 26...Ba2 (26...Ra8 27.Nb4 Ra4 28.a3 Ra3 29.Bf1 (worse is 29.Nd5 Nd5 30.Bf1 Nf4+/–) 29...Nf1 30.Kf1+–) 27.Nb4+– f6?? (27...Bd5 28.Rc5+– (28.Nd5?! Nd5 29.Rb1 Nf4+=)) 28.gf6 (28.Na2!? fg5 29.fg5 Nd5+–) 28...Rf6? (28...Bd5 29.Nd5 Nd5 30.Be6 Kh8 31.Bd5 Rd5+–) 29.Na2 Rf4 30.Be6 (better is 30.Rc5!? Rb8+–) 30...Kg7 31.Rc7 (31.Nb4 Kh6+–) 31...Kh6 32.Nb3 (32.Nb4!? Rf6 33.Rd7 Rd7 34.Bd7 Rf7+–) 32...Rdf8 Threatening mate... how? 33.Bh3 (33.Rf7! R8f7 34.Bf7 Rf7 35.Nd4+–) 33...Rf3+/– 34.Bg2?? (better is 34.Nd4 Rh3 35.Nc3+/– (35.Nb5?! Rf5 36.Re3 Re3+=)) 34...Ng2–/+ 35.Re2?? (35.Kg2 Rb3 36.Re2 Rd8–/+) 35...Rb3 (better is 35...Ne3 36.Re3 de3–+) 36.Rg2 (better is 36.Kg2 Rd8 37.Rd2–/+) 36...d3 (better is 36...b4–/+) 37.Rd2= g5 (37...Re8 38.Kf2+=) 38.Nc1+/– Ra3 (38...Rb4 39.Rd3 Rg4 40.Rg3 Rg3 41.hg3+=) 39.Rd3 (worse is 39.Nd3 Rd8 40.Rc6 Kg7 41.Rc7 Kh8+=) 39...Rd3 40.Nd3 Rf3 (40...Rd8 41.Rc3+/–) 41.Ne5 Rf4 42.Rc6 Kh5 (42...Kg7+/–) 43.h3 (43.Rc3+/–) 43...b4? (better is 43...Ra4+=) 44.Kg2 (44.Ng4 Rg4 45.hg4 Kg4 46.Rh6+–) 44...Re4?? (44...Rd4+–) 45.Nf3 (45.Nf7 Re2 46.Kf3 Re3 47.Ke3 Kh4 48.Kf3 h5 49.Rh6 b3 50.Nd6 g4 51.hg4 Kg5 52.Nf7 Kh4 53.Rh5) 45...Re2 (better is 45...g4!? 46.Rc5 Kh6 47.Rc6 Kg7 48.Rc7 Kg6 49.hg4 Rg4 50.Kf2 Re4=) 46.Kg3 b3 47.Nd4 Do you see the mate threat? 47...Re3 48.Kh2 (48.Kg2 g4 49.Rc5 Kg6 50.hg4 Re4 51.Nb3 Rg4 52.Kh3 Ra4+=) 48...Rd3 (48...b2 49.Rb6 Rd3 50.Nf5+=) 49.Nf5 The mate threat is Rh6 49...g4 50.h4?? (better is 50.Ng3 Kg5 51.Rc5 Kg6 52.hg4+=) 50...g3–/+ 51.Ng3 Kh4 52.Rh6 (52.Rc4 Kg5–/+) 52...Kg4–/+ 53.Ne4 (better is 53.Nf1–/+) 53...Kf3 (better is 53...Rd4!? 54.Rh3 Rb4 55.Nf2 Kg5 56.Rh7 b2 57.Rg7 Kf5–/+) 54.Nc5+= Rd2 (54...b2 55.Rb6 Rd2 56.Kh3=) 55.Kh3= b2 Threatening mate: b1Q 56.Rb6 (56.Rf6 Ke2 57.Rb6 Ke1=) 56...Ke2 (56...Rd5 57.Rb3 Kf4 58.Rb4 Kf5=) 57.Ne4 (better is 57.Na4!?=) 57...Rc2–/+ 58.Ng3? (better is 58.Nc5 Rc5 59.Rb2 Kf3 60.Rb3 Kf4 61.Rb8–/+) 58...Kd1–+ 59.Rd6 (59.Kg4 Rc4 60.Kf3 Kc2–+) 59...Kc1 60.Rb6 b1Q Threatening mate... how? 61.Rb1 Kb1 62.Nh5 Rc3 (62...Rc1 63.Kg4–+) 63.Kh4 (63.Kg4 Kc2–+) 63...Rc7 (63...Rc6 64.Nf4–+) 64.Nf6 (64.Nf4–+) 64...h6 (better is 64...Rf7 65.Ne8 Kc2–+) 65.Kh5–/+ Rc6 66.Ng4 Kc2 67.Nh6 Rf6 (67...Kd3 68.Nf7–/+) 68.Ng4 Re6 69.Nf2 Re2 70.Ng4 Kd3 71.Kg5 Ke4 72.Nf6 Ke5 73.Ng4 Ke6 74.Nh6 Re5 (74...Rf2 75.Ng4–/+) 75.Kg4 (75.Kf4 Rh5 76.Ng4 Rh4–/+) 75...Re1 76.Kg5 (76.Kf4 Rf1 77.Ke4 Rg1–/+) 76...Rf1 (76...Kd5 77.Ng4–/+) 77.Ng4 Rf5 78.Kh4 (78.Kg6 Rd5–/+) 78...Rf8 (78...Rc5 79.Nh6–/+) 79.Kg3 (79.Kg5 Rf3–/+) 79...Kf5 (79...Kd5 80.Kh4–/+) 80.Ne3 (80.Kf3 Rc8–/+) 80...Ke4 81.Ng4 (81.Nc4 Rd8–/+) 81...Rf3 (81...Rg8 82.Kh4 Kf4 83.Nh6–/+) 82.Kh4 Kf5 Do you see the mate threat? 83.Nh6 Kg6 The mate threat is Kxh6 84.Ng8?? (better is 84.Ng4 Rc3 85.Nf2–/+) 84...Re3 85.Kg4 Kg7 86.Kf4 Re8 (86...Kg8?! 87.Ke3=) 87.Nf6 Kf6 0–1. Cleopatre – marcel1111, internet, 2007.

3.Qb3 d5 4.d4=+.

3.Qb3 e6 4.Ba3 (4.a3 d6=) 4...Nf6 5.Bb2 (5.Nf3 d5=) 5...Bd6 (5...e5 6.Qa4–/+) 6.d4 b5 7.Nd2 h6 (7...Bb7 8.e4 Bf4 9.Ngf3=) 8.Ngf3 0–0 (8...g5 9.e4+=) 9.h3 (9.e4!? Bf4 10.a4+=) 9...e5=+ 10.e3 (10.d5 e4 11.dc6 ef3 12.cd7 fe2 13.Be2 Bd7=+) 10...ed4 11.cd4 Re8 (11...Nb4 12.a3 Nc6 13.d5=+) 12.Bd3? (12.a3 Bb7=) 12...Qe7 (better 12...Nb4 13.Bg6 Nbd5–/+) 13.a3= Bb7 14.Bc3 (14.0–0 Rab8=) 14...Qe6 (14...Nb8 15.0–0=) 15.Qe6 de6 16.Ne4 Ne4 17.Be4 Rab8 18.Ne5 (18.Rd1 f5 19.Bd3 Ne7=) 18...Be5 (18...Ne5 19.Bb7 Nd3 20.Ke2 Nf2 21.Kf2 Rb7 22.Rac1–/+) 19.de5= Ne7 (19...Nb4!? 20.ab4 Be4=) 20.Bb7+= Rb7 21.e4 c6 (21...Rc8 22.Ke2=) 22.Rd1+= Ng6 (22...Rc7 23.Bd4+=) 23.g3 (better 23.Rd6!?+–) 23...Rc7 24.f4 c5 25.bc5 (25.Ke2 cb4 26.Bb4 Ra8+=) 25...Rc5= 26.Rd3 Rec8 27.Kd2 Ne7 28.Bb4 Rc2 29.Ke3 Nc6 30.Bc3 Na7 31.Bd4 Nc6 32.Rc3 (32.Rhd1 Na5=) 32...Rg2 33.Rhc1 (33.g4!?=) 33...Rg3–/+ 34.Kf2 Rc3 35.Rc3 Ne7 (35...a5 36.Bc5–/+) 36.Rc8=+ Nc8 37.Bc5 Kh7 38.h4 (38.f5 g5=+) 38...g6 (38...Kg6 39.Kg3–/+) 39.Ke3=+ h5 (39...Kg7 40.Kd3=+) 40.Kd4 Kg7 41.Kc3 White fights for the Initiative 41...f6 42.Kb4 fe5 43.fe5 Kh6?? (better 43...g5 44.Ka5 gh4–/+) 44.Be3+– Kh7 (44...Kg7 45.Ka5 Kf8 46.Ka6+–) 45.Ka5 Ne7 46.Ka6 Nc6 (46...b4 47.ab4 Nc6+–) 47.Kb5 Ne5 48.a4 Nd7 (48...Ng4 49.a5 Ne3 50.a6+–) 49.Bf4 (49.a5!? Nb8 50.Bf4 e5 51.Be5 Nd7+–) 49...e5 50.Bg5 Kg7 51.a5 Nb8 52.Kb6 Kf7 53.Kb7 Nd7 54.a6 (better 54.Be3 Nf6 55.a6 Ne4 56.a7 Nd6 57.Kc6+–) 54...Nc5 55.Kb6 Na6 (55...Ne4?? 56.a7 Ng5 57.hg5+–) 56.Ka6 Ke6 57.Kb6 (better 57.Kb5 Kd7+–) 57...Kd6 58.Kb5 Ke6 (58...Kd7+–) 59.Kc5 Kf7 60.Kd5 Kg7 61.Ke5 Kf7 62.Kd6 (62.Kd6 Kf8 63.e5 Kf7 64.Kd7 Kf8 65.e6 Kg7 66.e7 Kh8 67.Bf6 Kh7 68.e8Q g5 69.Qf7 Kh6 70.hg5) 1–0. lindsey000 – theoysterman, gameknot.com, 2017.

3.d4 d5 4.Nd2 Bf5 5.e3 Nf6 6.Qf3 e6 7.Ba3 Bd6 8.Ne2?? (better is 8.Qd1–/+) 8...Bg4–+ 9.Qf6 Qf6 10.h3 (10.f3 Bh5 11.e4 Bf4–+) 10...Be2 11.Be2 0–0 12.0–0 Ne7 13.e4 (13.c4 c6–+) 13...de4 (better is 13...Qf4 14.Nf3 de4 15.Bc1–+) 14.Ne4 Qf4 15.f3 (15.Nd6 cd6 16.Bf3 d5–+) 15...Qe3 (better is 15...Nd5!? 16.Bc1 Qh2 17.Kf2–+) 16.Rf2 Qh6 17.Bc1 Qg6 18.a3 f5 19.Nd6 cd6 20.c4 Rac8 21.c5 dc5 22.dc5 e5 (22...f4 23.Bb2–+) 23.a4 Nd5 24.Bc4 Rcd8 25.Bb2 e4 26.fe4 fe4 27.Rd2 Qg5 28.Rad1 Rf5 29.Bc1 e3 30.Re2 (30.Rd4 Rf2 31.Rg4 Qe5 32.Bd5 Rd5 33.Rd5 Qd5 34.Be3 Rf7–+) 30...Kf8 31.b5 (31.Bb3–+) 31...Nc3 32.Rd8 Qd8 33.Re3 (33.Ba3 Qd1 34.Kh2 Qa4 35.ba6 ba6 36.Re3 Qc4 37.c6 Kf7 38.Re7 Kf6 39.Re1 Qc6 40.Be7 Kg6 41.Bh4–+) 33…Qd1 0–1. Kunk – chessH, ChessWorld.net, 2003.

3.e3 d6 4.Nf3 Bd7 5.d4 d5 6.Bb2 e6 7.a3 Be7 8.Bd3 Bf6 9.Nbd2 Nge7 10.0–0 h6 11.h3 (11.e4 Ng6+/–) 11...0–0 12.Qc2 b6 (12...e5 13.de5 Ne5 14.Ne5 Be5 15.Nf3+=) 13.Rfe1 a5 14.e4 de4 15.Ne4 ab4 (15...Nf5 16.b5 Nb8 17.Nf6 Qf6 18.c4+–) 16.ab4 Ra1 17.Ra1 (17.Nf6 gf6 18.Ra1 Kg7+–) 17...Re8 (better is 17...Nd5!?+/–) 18.Nf6 gf6 19.Nd2 (19.Qd2 Kg7+–) 19...Kh8 20.Ne4 Rg8? (20...Kg7 21.Ng3 f5 22.b5+–) 21.Ng3 (better is 21.Nf6 Rg7 22.b5+–) 21...f5 22.Re1 (22.b5 Na5+–) 22...Ng6 23.Qd2 Nce7?? (23...Qh4 24.d5! Nce5 25.c4+–) 24.Be2 (24.Qh6) 24...Kh7 (24...f4 25.Nh5+–) 25.Bf3 (25.Nh5 Rf8+–) 25...c6 (25...Nh4 26.Bh5 Qa8=) 26.Nh5 Nc8 (26...Rf8 27.Bc1 Ng8 28.Nf4+–) 27.Bc1 b5?? (27...f4+–) 28.Qh6 1–0. Fournier,Frederic (1750) – gr3c0ol (1750), Active blind, 2011.

3.e4 e5 4.Nf3 Nf6 5.Bc4 Be7 6.0–0 0–0 7.Ng5 h6 8.Nf7 Rf7 9.Bf7 Kf7 10.Qf3 d6 11.d3 Bg4 12.Qe3 Qd7 13.f3 Bh5 14.Ba3 Ne8 15.Nd2 Bg5 16.Qe2 Kg8 17.g4? (better is 17.Bc1–/+) 17...Bf7–+ 18.d4 ed4 19.cd4 Nd4 20.Qd3 Nb5 (better is 20...Nc6 21.Nc4–+) 21.Bc1? (21.Bb2 Na7–+) 21...Bg6 (better is 21...Bf6 22.Qb1 Bd4 23.Kg2 Ba1 24.Qa1–+) 22.Re1 Bf4 (better is 22...Bh4 23.Re3–+) 23.Qd5? (23.Nc4 Bc1 24.Rac1 Nf6–/+) 23...Kh8 (23...Bf7 24.Qb7 Ra7 25.Qb8–+) 24.Nf1? (better is 24.Nc4 c6 25.Qd3–/+) 24...Be5 25.Qb7 (25.Rb1 Nd4 26.Nd2–+) 25...Ra7 26.Qd5 Bf7 (26...Ba1 27.Be3 Be5 28.Ba7–+) 27.Qd2 (27.Qd3 Ba1 28.Be3–+) 27...Nd4 (better is 27...Ba1 28.Bb2 Bb2 29.Qb2 c5–+) 28.Bb2 (28.Qd1 Nc6 29.Be3–+) 28...Nf3 (28...Nf3 29.Kh1 Nd2 30.Be5 Nf3–+) 0–1. Geordiedazza – chessH, ChessWorld.net, 2003.

3.Nf3 e5 4.d3 d5 5.g3 Nf6 6.Bg2 e4 7.de4 Ne4 8.0–0 g6 9.Nh4 (better is 9.Nd4!?=) 9...Bg7 10.Be4 de4 11.Qd8 Nd8 12.f3 0–0 13.fe4 Re8 14.Nd2 (better is 14.a3!?–/+) 14...Bc3–+ 15.Rb1 Be6 16.Nb3 Bc4 17.Rf3 Bb4 18.Bf4 Be2 19.Re3 Bc4 20.Bc7 Nc6 21.Bf4 a5 22.e5 a4 23.Nc1 Bc5 24.Rb7 (24.Nf3 Be3 25.Be3 Ne5 26.Ne5 Re5–+) 24...Be3 (better is 24...g5!? 25.Bg5 Re5 26.Ng2 Rg5 27.Kh1–+) 25.Be3 Re5 26.Bf4 Re4 27.Kg2 (27.Nf3 Rae8 28.Rd7 Re3–+) 27...Bd5 (27...Ba2 28.Na2 Re2 29.Kf3 Nd4 30.Kg4 h5 31.Kg5 Ne6 32.Kh6 Ra2 33.Bd6–+) 28.Kh3 (28.Kf2 Nb4 29.Rb5 Rc8–+) 28...a3 29.Ne2 (29.Bd2 Be6 30.Kg2 Ba2 31.Kf2–+) 29...Re2 30.Rd7 0–1. Geordiedazza – Kunk, ChessWorld.net, 2003.

2.c3 b5

3.d4 e5 4.e4 (4.a4!? ba4 5.b5+=) 4...ed4= 5.cd4? (better is 5.Bb5!? dc3 6.Bc6 dc6 7.a3=) 5...Bb4–/+ 6.Bd2 Qf6 (6...Qe7 7.Bb5 Nd4 8.Bd3–/+) 7.Nc3 (7.Bb4 Nb4 8.Nf3 Qc6=+) 7...Qd4 (better is 7...Nd4!? 8.Rc1 c6–+) 8.Nge2 (8.Nf3!? Qc3 9.Bc3 Bc3 10.Nd2=) 8…Qe5 0–1. T PAIN – CODD, internet, 2007.

3.d4 e6 4.Nf3 g5? (better is 4...a5!? 5.e4 Nf6 6.Bb5 ab4+=) 5.e4 Bh6 (5...g4 6.Ne5+/–) 6.g4 (6.Bb5 Bb7+–) 6...Nf6 (6...a6 7.a4 ba4 8.Ra4+/–) 7.Bb5 Nb8? (better is 7...Ne4 8.h4 Bb7+/–) 8.Na3?? (better is 8.Ng5!? Ba6 9.Ba6 Na6+–) 8...Bb7? (better is 8...Ne4 9.Qd3 Bb7+=) 9.Ne5?? (better is 9.e5 Ne4 10.c4+–) 9...Ne4=+ 10.f3 Nc3 11.Qd3 Nb5 12.Qb5 Bg7?? (better is 12...Ba6 13.Qa4 f6–/+) 13.Nd3?? (13.Qb7 Be5 14.de5 Nc6 15.Bg5 Qb8 16.Qb8 Rb8+–) 13...f6 (better is 13...Ba6 14.Qg5 Qg5 (14...Bd3? 15.Qg7 Rf8 16.Bh6+–) 15.Bg5 Bd3–+) 14.Qb7+– Nc6 15.Nc5 (better is 15.Be3+–) 15...d6?? (better is 15...Rb8 16.Qa6 Nd4+=) 16.Qc6 (16.Ne6!? Qc8 17.Qc6 Kf7 18.Nc7 Rb8+–) 16...Ke7 17.h3 (17.Na6 Qd7 18.b5 h5+–) 17...Rb8 (17...dc5 18.Qc5 Qd6 19.Be3+–) 18.Bd2 (18.Nd3 Rb6 19.Qa4 Qa8+–) 18...Qc8 (18...Rb6 19.Ne6 Rc6 20.Nd8 (20.Ng7?! Ra6 21.Nf5 Kd7+=) 20...Kd8 21.b5+–) 19.Qe4 (better is 19.Na6 Rb6 20.Qc7 Qc7 21.Nc7+–) 19...dc5 20.dc5 (better is 20.bc5 Qb7 21.c6+–) 20...Rb4?? (20...f5 21.Bg5 Kf7+–) 21.Bb4 Qa6 (21...f5 22.c6 Kf7 23.Qb1+–) 22.Nc2 (22.c6!? Kf7 23.Rd1 Re8+–) 22...f5 23.Qd4 (23.c6 Kf7 24.gf5 Ba1 25.Qe6 Kg7 26.Qe7 Kh6 27.h4 Bc3 28.Bc3 Qf1 29.Kf1 gh4 30.Rh4) 23...Rb8?? (23...Bd4 24.c6 Kf6 25.Nd4 Qc4–+) 24.Qg7+– Kd8 25.Qg8 Ke7 26.Qb8 Kf6 27.Qc7 (better is 27.Qh8 Kg6 28.Qe8 Kh6+–) 27...Qa4 28.Bc3 Kg6 29.Ne3 (29.Qg7) 29...a5 (29...Qd4 30.Bd4 e5 31.gf5 Kh6 32.Ng4 Kh5 33.Qh7) 30.Qg7# 1–0. Franziska,Franzi – Bia,Bianca, remoteschach.de, 2002.

3.d4 Nf6 4.f3 e5 5.d5 (5.a4 Nh5 6.Nh3 ba4+–) 5...Ne7= 6.e4 Ba6? (6...a5!?=) 7.a3 (7.a4 Bb7 8.ab5 Ng6+–) 7...h6 (7...Nc8 8.a4+=) 8.g3 (8.a4 Bb7 9.ab5 Nc8+–) 8...Ng6 (8...Qc8 9.Be3+=) 9.Qd2 (9.a4 c6 10.dc6 dc6 11.Qd8 Kd8+–) 9...Nh5? (better 9...Qc8!?=) 10.a4+– Bd6 11.ab5 Bb7 12.Bh3 (12.Qf2 Qb8+–) 12...0–0 (12...a6 13.ba6 Ba6 14.Ne2+–) 13.Bg4 (better 13.Qd3+–) 13...Nhf4?? (better 13...Nf6+=) 14.Kf1 (14.gf4 Nf4 15.Qc2 c6 16.Bf4 ef4 17.dc6 dc6 18.bc6 Bc6+–) 14...h5 15.Bf5 (15.gf4?! hg4 16.f5 Nf4+=) 15...Ne7 16.gf4 ef4 (16...Nf5 17.ef5 ef4 18.Ne2+–) 17.Ke1 (better 17.Bh3!? f5+–) 17...Nf5 18.ef5 Qe7 19.Kd1 Qe5 20.f6 (20.Ne2!? Bd5 21.Qd3 Bb3 22.Ke1 Rfe8+–) 20...Bd5+– 21.Ra3 g5 (21...Qe6 22.fg7 Bb3 23.Rb3 Qb3 24.Qc2 Qc2 25.Kc2+–) 22.Bb2 (better 22.Qd3+–) 22...Qf6?? (22...Qe6!?+–) 23.c4 (23.Qd5 Qe5 24.Qe5 Be5+–) 23...Be5?? (better 23...Qf5 24.Qd5 Qb1 25.Bc1 Be7+–) 24.Be5 (24.Qd5?! Bb2 25.Ra5 Qe7+–; 24.cd5?! Bb2 25.Ra6 d6+–) 24...Qe5 25.cd5 Rfe8 26.Ne2 d6 (26...Qf5 27.Nbc3 Re3 28.Rg1+–) 27.Nbc3 Kg7 (27...Qe3 28.Rg1 f6 29.h4+–) 28.Ne4 h4 (28...f6 29.h4 Kh6 30.hg5 fg5 31.Nd4+–) 29.Rc3 (29.Ng5 Kf8 30.Ne4 Reb8+–) 29...Rab8 (29...Kh8 30.Rc7 a6 31.Rg1+–) 30.Ke1 (better 30.Rg1 f6 31.Nf4 Kh6+–) 30...Rb5 31.Rg1 Kf8 (31...Rd5 32.Qc2 c5 33.bc5 dc5 34.Rg5 Qg5 35.Ng5 Rg5+–) 32.Rg5 Qe7 (32...Qh8 33.Rc7 Re4 34.fe4+–) 33.Rh5 Qd8 34.Qd4 (34.Qf4 h3 35.Rh8 Ke7 36.Qf6 Kd7 37.Qf5 Ke7 38.Re3 Rh8 39.Ng5 Kf8 40.Qf7) 34...c5 35.Rh8 (35.Rh8 Ke7 36.Qf6 Kd7 37.Qd6 Kc8 38.Qc6 Kb8 39.Qb5 Ka8 40.Nd6 Qc8 41.Re8 Qe8 42.Qe8) 1–0. patrick317 – warrior23, gameknot.com, 2018.

3.e4 a6 4.a4 Rb8 5.ab5 ab5 6.Nf3 +=.

3.Nf3 e5 4.e4 d6? (better is 4...a5!?+=) 5.Bb5+– Bb7 (5...Bd7 6.Bc4+–) 6.d4 a6 7.Bc4 (7.Ba4 ed4 8.Nd4 Qd7+–) 7...ed4+/– 8.cd4 Nb4 9.Qa4 Nc6?? (better is 9...Bc6 10.Bf7! Kf7 11.Qb4 Qe8 12.Ng5 Kg6+/–) 10.d5 (10.Qb3!? d5 11.Qb7 Bb4 12.Bd2 Bd2 13.Nbd2 Nd4 14.Nd4 dc4 15.Qc6 Kf8+–) 10...Qd7 11.0–0?? Nf6? 12.h3?? Ne4? 13.Re1 Be7 14.Re4 Ne5 15.Qd7 Kd7 16.Ne5 de5 17.Re5 Bf6 18.Bf4?? Be5?? 19.Be5+– Rhe8 20.Bg7 Re1 21.Kh2 c6 22.dc6 Bc6 23.Nd2 Ra1 24.Ba1 Rg8 25.g3 h5 26.Bf7 Rf8+/– 27.Bh5?? Rf2–/+ 28.Kg1 Rd2 29.a3 Rg2–+ 30.Kf1 Rg3 31.Bg4 Ke7 32.Kf2 Ra3–+ 33.Be5 a5 34.h4 a4 35.h5 Rd3 36.Bf5?? Rf3 37.Ke2 Rf5 38.h6 Re5 39.Kd3 Rh5 40.Kc4 Bd7 41.h7 Rh7 42.Kb4 Rh3 43.Kc5 a3 44.Kd5 a2 45.Ke5 a1Q 46.Kf4 Qd4 47.Kg5 Rg3 48.Kh5 Qh8 0–1. alanwsp (1755) – pjp (1645), net–chess.com, 2004.

3.e4 e5

4.Bb5+/– a6 5.Bc4 Bb7 6.Qf3 Nf6 7.Nh3 g6? (better is 7...Ne7+/–) 8.Ng5+– Qe7 9.Ba3 (better is 9.Bf7 Kd8 10.Bc4+–) 9...0–0–0?? (better is 9...Nd8+/–) 10.b5 (< 10.Nf7 Ne4 11.Nh8 Nd6+–; 10.Bf7?! Nh5 11.h4 Qf6+–) 10...ab5 (10...d6 11.bc6 Bc6 12.Ba6 Kb8+–) 11.Be7 Be7 12.Bd5 Nd5 13.ed5 Bg5 14.dc6 Bc6 15.Qf7 Bg2 16.Rg1 Rdf8 17.Qb3 Bh4 18.Rg2 Rf3 19.Qb5 Rhf8 20.Kd1 Rf2 21.Rf2 Rf2 22.Qe5 d6 23.Qh8 Kb7 24.Qh7 Rh2 25.Qg6 Rh1 26.Kc2 Rf1 27.Qg2 (27...Kc8 28.Qf1+–) 1–0. METSAR – I need chocolate..., ChessWorld.net, 2005.

4.Bb5 Rb8 5.Bc6 dc6 6.g3 (6.Nf3 Qd3 7.Qe2 Qe2 8.Ke2 Bg4+/–) 6...Be7 (6...c5 7.Nf3 Qd3 8.Qe2=) 7.Qa4 (7.Nf3 Bg4 8.h3 Bf3 9.Qf3 c5+=) 7...Qd3= 8.Qc6 Qd7 (better is 8...Bd7!? 9.Qd5 Bb5 10.Qd3 Bd3=) 9.Qc4 (9.Qd7 Bd7 10.Nf3 Bd6+–) 9...Nf6 (9...Rb6 10.Nf3 f6 11.d4+=) 10.Nf3 Bb7? (better is 10...Bd6 11.d4 ed4 12.Qd4 0–0+/–) 11.Ne5+– Qe6 12.Qe6 (12.Qc7 0–0 13.d4 Rfc8+=) 12...fe6 13.d3 0–0 14.Bg5 Bd6 (14...Rbd8 15.Nd2+–) 15.Bf6 Rf6 (15...Ra8 16.Bg7! Kg7 17.f4+–) 16.Nd7 Rd8 17.Nf6 gf6 18.0–0 (better is 18.f3!? Be7 19.Ke2 f5+–) 18...Be7 19.Rd1 Be4 20.d4 (20.de4 Rd1 21.Kg2 Re1+/–) 20...Rd5 21.c4 Rh5 (21...Rd7 22.Nc3 Bc2 23.Rd2+–) 22.Nd2 Bc2 23.Re1 (better is 23.Rdc1!? Bg6 24.a3 Kf7+–) 23...Bb4 24.Re2 (24.Ne4 Kf7 25.Re2 Bd3+–) 24...Bf5 (24...Bc3 25.Rc1 Bd3 26.Rc3 Be2 27.Ra3+–) 25.Nb3 Bc3 26.Rc1 Bg4 (26...Bb4 27.f3 Rg5 28.g4+–) 27.Re4 (27.f3 Bf3 28.Re3 Bb4 29.Rf3 Kf7+–) 27...f5 (27...Bf5 28.Re3 Bb2+–) 28.Re6 f4 29.Rc6 White plans c5 29...Bb4 30.Rc7 fg3 31.fg3 (31.hg3?? Bf3 32.Rc8 Bf8 33.Rf8 Kf8 34.Nc5 Rh1) 31...Bd6 (31...a5 32.Ra7+–) 32.Ra7 Bf3 (32...Bf8 33.c5 Rd5 34.c6+–) 33.c5 Bf8 34.c6 Bh6 (34...Bg4 35.c7+–) 35.Rc3 Rf5 (35...Bg4 36.c7 Bf8+–) 36.c7 Rf8 37.c8Q Bg4 38.Qg4 Kh8 (38...Bg5 39.Qg5 Kh8 40.Qg7) 39.d5 (39.Qd7 Be3 40.Re3 Rf1 41.Kf1 Kg8 42.Re8) 39...Rg8 (39...Rf6 40.Rc8 Rf8 41.Qf5 Be3 42.Kg2 Rc8 43.Qc8) 40.Qd4 Bg7 41.Rg7! Rg7 (41...Rg7 42.Rc8) 42.Rc8 1–0. sosg – steveb316, gameknot.com, 2005.

2.e4 Nb4

3.Ba3 Nc6 4.Bb5 (4.Nf3 Nf6 5.e5 Nd5=+) 4...Nd4 (better is 4...Nf6–/+) 5.c3?? (better is 5.Bc4=+) 5...Nb5–+ 6.Bb4 Nf6 (6...c6 7.a4 Nc7 8.Nf3–+) 7.Qa4 (7.a4 c5 8.e5 cb4 9.ab5 Nd5–+) 7...c6 8.c4 a5 9.Bc5 Nc7 10.e5 b5 11.cb5 cb5 12.Qe4 Ne4 13.d3 Nc5 14.d4 Nd3 15.Kd1 Nf2 16.Kd2 Nh1 17.Nc3 Nf2 18.Ne4 Ne4 19.Ke3 (19…Bb7 20.a4–+). linford – piccolo, net–chess.com, 2001.

3.Ba3 e5 4.c3 Nc6 5.Bf8 Kf8 6.d4 =+.

3.Nc3 Nf6 +=.

3.Nf3 d5 4.a3 de4 5.ab4 ef3 6.Qf3 –/+.

3.Nf3 d6 4.Nc3 Bd7 (4...d5 5.a3 de4 6.Ne4+=) 5.d4 (5.Rb1 a5+=) 5...f6 (5...e6 6.Rb1 c5 7.a3 cd4 8.Nd4=) 6.Bc4 (6.d5 c6+=) 6...e6 7.0–0 Qe7 (7...Ne7 8.Rb1 c5 9.a3+=) 8.d5 (8.Rb1 Nc6 9.Rb7+=) 8...e5 (8...a5 9.Rb1 b6 10.a3+/–) 9.Bd2 (better is 9.Rb1 Na6 10.Rb7+/–) 9...0–0–0?? (better is 9...a5+=) 10.Rb1+– Nc6 11.Qe2?? (better is 11.dc6 Bc6 12.Be3+–) 11...Na5 (better is 11...Nb8!?+/–) 12.Ba6+– ba6?? (12...Be8+–) 13.Qa6 Nb7 14.Qb7 1–0. interloper – Mphilliber, ChessWorld.net, 2010.

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

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