World number one chess player Garry Kasparov paid a price for his error against a computer called "X3D Fritz" on Thursday as he lost the second game of their four-game match in New York.
The grand master, playing with black pieces, blundered with a rook move that rendered the computer penetrate his defenses with an unstoppable attack -- a queen, a rook and a pawn marching down the board on its way to converting into another queen.
"I just blundered,"said the 40-year-old Kasparov after his three hours and 40 minutes of play.
Now the computer leads Kasparov by 1 1/2 points to 1/2 as one point is awarded for a win and a half point for a draw. The thirdgame is scheduled on Sunday.
Winner of the match wins 200,000 U.S. dollars and the prize is 175,000 U.S. dollars if the match ends in a tie.
X3D Fritz is German-made Fritz software, dominant in computer chess and sold commercially, combined with New York-based X3D Technologies company software that specializes in virtual reality.