 Deep Blue versus Garry Kasparov

Deep Blue was a computer chess-playing system developed by IBM that became famous for its matches against world chess champion Garry Kasparov in the late 20th century. The most notable event occurred in May 1997, when Deep Blue, an advanced version of its predecessor Deep Thought, defeated Kasparov in a six-game match, marking the first time a computer had beaten a reigning world champion in a match under standard chess tournament time controls.