1972    In Reykjavík, Iceland, American Bobby Fischer beats Russian Boris Spassky and becomes the world chess champion.

1975    Bobby Fischer refuses to play in a chess match against Anatoly Karpov, giving Karpov the title of World Champion by default.

1994    Péter Lékó becomes the youngest chess grand master.

1996    In Philadelphia, Pennsylvania, world champion Garry Kasparov beats the Deep Blue supercomputer in a chess match.

1997    IBM Deep Blue, a chess-playing supercomputer, defeats Garry Kasparov in the last game of the rematch, becoming the first computer to beat a world-champion chess player in a classic match format.