Kortchnoi – Dreev, 1992
Having invested one piece into opening up Black’s king, Viktor Kortchnoi should have thrown in another one!
19. Bb4 would have won the game, since after 19… Bxb4 20. Re3, the rook threatens to swing both to g3 and to h3.
Instead Viktor the great must have overlooked the idea completely and settled for perpetual check! Click here for the complete game.