(1) Mamedyarov,S (2761) - Naiditsch,A (2684) [D37]
Sparkassen GM Dortmund GER (6), 21.07.2010

1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 dxc4 5.Qa4+ Nbd7 6.e4 a6 7.Bxc4 c6 8.Qd1 b5 9.Bd3 Bb7 10.e5 Nd5 11.Nxd5 cxd5 12.Ng5 Be7 13.h4 Qb6 14.Qg4 h6 15.Nf3 g6 16.Bd2 a5 17.0-0 b4 18.a3 Ba6 19.Bxa6 Rxa6 20.Rfc1 Qb7 21.h5 g5 22.Nh2 bxa3 23.bxa3 0-0 24.Qg3 Qb2

The Azerbaidjan genius had conducted the game with verve and class, and now had a golden opportunity to finish it off in style. Unfortunately he misses the chance here and plays

[25.Qd3! Qb6 26.Ng4 Kg7 27.f4 Raa8 28.Kh2 gxf4 29.Bxf4 and White's attack is decisive. Ex: 29...Rh8 30.Rf1 Rh7 31.Bg5!! Bxg5 32.Rxf7+ Kxf7 33.Qxh7+ Ke8 34.Rf1! Be7 35.Qg8+ Nf8 36.Rxf8+! Bxf8 37.Nf6+ Kd8 (37...Ke7 38.Qh7+ Kd8 39.Qd7# ) 38.Qxf8+ Kc7 39.Qxa8 ]

25...Rb6 26.Bc3 Qb5 27.a4 Qa6 28.Bd2 Kh7 29.Rc7 Rb7 30.Rac1 Rxc7 31.Rxc7 Rd8 32.Nh2 Qe2 33.Bxa5 Qd1+ 34.Nf1 Qxa4 35.Qc3 Ra8
After spending the entire game either completely won or just better, he has a moment of madness.

No doubt, Mamedyarov is still wondering what on earth possessed him to play this. 0-1