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.

Deep Blue was a customized IBM RS/6000 SP supercomputer for chess-playing. It was the first computer to win a game, and the first to win a match, against a reigning world champion under regular time controls. Development began in 1985 at Carnegie Mellon University under the name ChipTest. It then moved to IBM, where it was first renamed Deep Thought, then again in 1989 to Deep Blue. It first played world champion Garry Kasparov in a six-game match in 1996, where it won one, drew two, and lost three games. It was upgraded in 1997, and in a six-game re-match it defeated Kasparov by winning two games and drawing three. Deep Blue's victory is considered a milestone in the history of artificial intelligence and has been the subject of several books and films.

Garry Kimovich Kasparov is a Russian chess grandmaster, former World Chess Champion (1985–2000), political activist and writer. His peak FIDE chess rating of 2851, achieved in 1999, was the highest recorded until being surpassed by Magnus Carlsen in 2013. From 1984 until his retirement from regular competitive chess in 2005, Kasparov was ranked the world's No. 1 player for a record 255 months overall. Kasparov also holds records for the most consecutive professional tournament victories (15) and Chess Oscars (11).

Game 6 of the Deep Blue–Kasparov rematch, played in New York City on 11 May 1997 and starting at 3:00 p.m. EDT, was the final chess game in the 1997 rematch between Deep Blue and Garry Kasparov.

May 11 is the 131st day of the year in the Gregorian calendar; 234 days remain until the end of the year.