NEW YORK, Nov. 14 (UPI) -- Garry Kasparov, the human world chess champ, made just one mistake and that was all Fritz the Computer needed to win the match Friday in New York.
NewScientist.com reported that it was the chess computer program X3D Fritz's first ever victory over his human rival.
"You work hard for three hours, you get a very promising position, you make a blunder and you go home," Kasparov told reporters after the game.
Fritz had nothing to say about his victory.
Commentators described Kasparov's mistake as "an incredible oversight".
Fritz now has a one-point lead in the four-game contest. The first game ended in a draw.
John Fernandez, consultant for Fritz, says he will not be satisfied until Fritz uses "real intelligence" to beat Kasparov, rather than "waiting for the human to slip up and then nailing him."
He added, "We already know that the major difference is that humans make mistakes and computers don't."