The man-versus-machine chess showdown remained deadlocked Wednesday as world champion Garry Kasparov and the IBM supercomputer Deep Blue drew their second game in a row.
After one win each and two draws, the score of the six-game match in Philadelphia stands at 2-2.
Kasparov, surprised by the intensity of the battle with a computer that calculates hundreds of millions of moves per second, acknowledged that he was drained by the first four games. After Wednesday's game, he said, "I'm exhausted. I'm dead."
On Wednesday, Kasparov obtained a small advantage with the White pieces but could not make progress. When Deep Blue's operator temporarily lost contact with the computer, Kasparov was visibly upset. "It was a crucial moment of the game. You're so full of all these emotions and it's difficult to control yourself."
At move 33, Kasparov devised a plan to capture Black's vulnerable c-pawn. He attained that goal two moves later but Deep Blue had foreseen that it could recover the lost pawn and another.