Matrix refuted Nakamura vs A Volokitin, 2005  (B20) Sicilian, 23 moves, 0-1 White could win by a very nice combo. Black won instead... A Beliavsky vs Naiditsch, 2006  (E15) Queen's Indian, 39 moves, 0-1 1700 beats 2500!! M Fouts vs N Firman, 2003  (B07) Pirc, 27 moves, 1-0 Grand vs Master Grand vs Steinitz, 1872  (C52) Evans Gambit, 31 moves, 1-0 Carlsen vs J Polgar, 2007  (E10) Queen's Pawn Game, 27 moves, 1-0 49... Black to play and mate in 208. Karjakin vs Shirov, 2007  (B33) Sicilian, 103 moves, 1/2-1/2 6 games