Official Stockfish pre-release: Stockfish dev-20250928 (Windows and MacOS)

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Official prerelease Stockfish dev-20250928
Rating Chess Engines Diary CEDR=3761,4

Great news for chess enthusiasts! 
The pre-release version of Stockfish dev-20250928, 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-20250928 version?

Simplify use of low-ply history in evasions

Passed Non-regression STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 65024 W: 16991 L: 16804 D: 31229
Ptnml(0-2): 182, 7423, 17119, 7602, 186
https://tests.stockfishchess.org/tests/view/68c23f5459efc3c96b6113df

Passed Non-regression LTC:
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 207312 W: 53126 L: 53095 D: 101091
Ptnml(0-2): 126, 21986, 59389, 22041, 114
https://tests.stockfishchess.org/tests/view/68c241e359efc3c96b6113ef

closes https://github.com/official-stockfish/Stockfish/pull/6308

Bench: 2515619

Stockfish dev-20250928 download (all files: stockfish-windows-armv8.exe, stockfish-windows-armv8-dotprod.exe, stockfish-windows-x86-64.exe, stockfish-windows-x86-64-avx2.exe, stockfish-windows-x86-64-avx512.exe, stockfish-windows-x86-64-avx512icl.exe, stockfish-windows-x86-64-avxvnni.exe, stockfish-windows-x86-64-bmi2.exe, stockfish-windows-x86-64-sse41-popcnt.exe, stockfish-windows-x86-64-vnni256.exe, stockfish-windows-x86-64-vnni512.exe  )  mirror 

Here are some sample tournament wins for the Stockfish engine on Android and Windows::





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