Found out something about the Deep Blue computer which beat Garry Kasparov in May 11, 1997.
Deep Blue is a chess-playing computer developed by IBM. On May 11, 1997, the machine won a six-game match by two wins to one with three draws against world champion Garry Kasparov. Kasparov accused IBM of cheating and demanded a rematch, but IBM declined and dismantled Deep Blue. Kasparov had beaten a previous version of Deep Blue in 1996.