Fifteen years ago, the best a computer could do was beat our greatest chess player at chess. The computer won the match 3.5 – 2.5 and Kasparov lost a chess match for the first time in his life. We understood how it worked: the computer could think ahead farther than Kasparov could. In a later match against a different computer, Kasparov offered a draw in the final and deciding match, explaining he did so because "he didn't want to make a blunder."
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