29..Kf7?? losing to a mate in one instead of 29..Bxf6 winning. Staunton vs Anderssen, 1851  (C54) Giuoco Piano, 30 moves, 1-0 36.Ng5?? sacrificing his own queen :) Petrosian vs Bronstein, 1956  (E66) King's Indian, Fianchetto, Yugoslav Panno, 36 moves, 0-1 63.Kd5?? Huebner vs Korchnoi, 1980  (C07) French, Tarrasch, 63 moves, 0-1 34..Qe3?? allowing fritz to mate in one,instead of a draw. Deep Fritz vs Kramnik, 2006  (D20) Queen's Gambit Accepted, 35 moves, 1-0 4 games