Official prerelease Stockfish dev-20250816
Rating Chess Engines Diary CEDR=3763
Rating Chess Engines Diary CEDR=3763
Great news for chess enthusiasts! The pre-release version of Stockfish dev-20250816, widely recognized as the world's top chess engine, has been released. This brings us one step closer to the next official release. Our team is excited to begin testing it today, and we'll be sure to share the results on our website. Stay tuned!
What changes in the new Stockfish dev-20250816 version?
Simplify dual bonuses
Merge dual capture/quiet bonuses into one
Passed simplification STC
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 223200 W: 57868 L: 57854 D: 107478
Ptnml(0-2): 689, 26441, 57296, 26515, 659
https://tests.stockfishchess.org/tests/view/6898d28e0049e8ccef9d6384
Passed simplification LTC
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 147270 W: 37750 L: 37659 D: 71861
Ptnml(0-2): 84, 15869, 41633, 15970, 79
https://tests.stockfishchess.org/tests/view/68990fe30049e8ccef9d643c
closes https://github.com/official-stockfish/Stockfish/pull/6226
Bench: 2996176
Stockfish dev-20250816 download (all files)
Here are some sample tournament wins for the Stockfish engine on Android and Windows::
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