Deep Blue was a chess-playing expert system run on a unique purpose-built IBM supercomputer. 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 lost two games to four. In 1997 it was upgraded and, in a six-game re-match, it defeated Kasparov winning three and drawing one. Deep Blue’s victory was considered a milestone in the history of artificial intelligence and has been the subject of several books and films.

Source : Wikipedia