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World chess champion Garry Kasparov won his final game over a supercomputer Saturday, sealing a victory in the historic six-game match pitting man against machine.

Kasparov forced IBM's Deep Blue to concede after 43 moves in 3 hours, 46 minutes."Garry has shown the brilliant creativity that made him world champion," said Yasser Seirawan, an international grandmaster. "His ability to learn, and adapt, and seize an advantage are marvelous."

Needing only a draw, Kasparov nonetheless attacked from the first move, seeming determined to trounce a computer that can calculate more than 200 million moves a second.

The computer had defeated the 32-year-old Russian in the first game Feb. 10, but Kasparov won the second and fifth games and earned draws in the third and fourth.

Kasparov joined Deep Blue team leader Chung-Jen Tan in calling the match a historic first.

No machine had ever won a game in tournament conditions against a player of Kasparov's caliber, and no other chess computer can rival Deep Blue's calculating speed.

"I feel wonderful," Kasparov said. "I can only compare it to '85, when I won the championship from Anatoly Karpov."

But he promised a rematch with the computer, saying it was "crucial to the world of chess."

After the match, Kasparov entered a separate spectating room where 700 chess fans applauded him with wild whistles and cheers.

More than 6 million spectators around the world also followed the match move-by-move on the Internet.

Kasparov admitted he had underestimated Deep Blue.

"I was lucky to lose Game 1; otherwise, disaster could have struck later. I got an early warning," he said.

"I believe there are very few chess players in the world that can take this heat and play this machine."

Tan was pleased with the performance of the supercomputer, which is actually 32 computers working together at IBM's T.J. Watson Research Center in Yorktown Heights, N.Y.

Deep Blue represents "a great leap forward in the study of parallel processes, that is how to manage many computers operating efficiently and at once," he said.