Open-source chess research dataset containing 994,269 engine-annotated inaccuracies, mistakes, and blunders from 140,662 broadcast games (Jan–May 2026).
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Updated
Jun 13, 2026
Open-source chess research dataset containing 994,269 engine-annotated inaccuracies, mistakes, and blunders from 140,662 broadcast games (Jan–May 2026).
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