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In page Vladimir Kramnik:

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In October 2002, Kramnik competed in Brains in Bahrain, an eight-game match against the chess computer Deep Fritz. Kramnik started well, taking a 3–1 lead after four games. But in game five, he made what was called the worst blunder of his career, losing a knight in a position that was probably drawn. He quickly resigned. He also resigned game six after making a speculative sacrifice, although subsequent analysis showed he had drawing chances in the final position. The last two games were drawn, and the match ended at 4–4.[citation needed]