Twenty-four years ago on Monday, a world chess champion came up against a force too great to overcome: a computer.
He ultimately beat the machine with three wins. The chess battle attracted worldwide attention and was followed by more than 6 million people via the Internet.
A rematch occurred in 1997 and the computer, which was enhanced by then, prevailed. Kasparov lost the last game of the six-match series in 19 moves.
He went up against another computer program in 2003 called Deep Junior and battled to a tie.
Kasparov retired from professional chess in 2005 and has worked as a Russian pro-democracy advocate, according to this website. He is considered one of the greatest chess players in history.