Jonathan Schaeffer

Canadian computer scientist

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July 17, 2026

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Jonathan Schaeffer is a Canadian computer scientist recognized for his work in artificial intelligence, particularly in the game of checkers. He developed Chinook, the first computer program to win a world championship against a human in any game.1

Schaeffer's research with Chinook explored trillions of possible checker positions, contributing to the confirmation that checkers, with optimal play, always results in a draw. This achievement demonstrated the power of AI in solving complex strategic games. His work also touches upon evolutionary computing, a method where programs improve over successive generations.12

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checkers
…for the proof belongs to Jonathan Schaeffer, a Canadian computer scientist, who had earlier developed the first computer program, named Chinook, to win a world championship from a human at any game. Chinook lost its first championship challenge match in 1990 to the American mathematician Marion Tinsley, with two wins…
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…for the proof belongs to Jonathan Schaeffer, a Canadian computer scientist, who had earlier developed the first computer program, named Chinook, to win a world championship from a human at any game. Chinook lost its first championship challenge match in 1990 to the American mathematician Marion Tinsley, with two wins…
Read More