Ply (game theory) consists of one proposed move by the machine and one anticipated reply by the opponent"). In computing, the concept of ply is important because one ply corresponds to one level of the game tree. The Deep Blue chess computer which defeated Kasparov in 1997 would typically search to a depth of between six and sixteen plies to a maximum of forty plies in some situations. Ply (game theory) In two-player sequential games, a ply is one turn taken by one of the players. The word is used to clarify what is meant when one might otherwise say "turn". The word
Game Over: Kasparov and the Machine into a perpetual check. The next three matches ended in draws, with Kasparov appearing to weaken psychologically. Deep Blue went on to win the decisive sixth game, marking the first time in history that a computer defeated the World Champion in a match of several games. From this experience, particularly the second game of the match, Kasparov accused the IBM team of cheating. He suspected that a human player was used during the games to improve the strategic strength of the computer. As a metaphor for this suspicion, the film weaves in the story of the Turk, a hoax involving