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Stockfish dev-20260504 - official Stockfish pre-release version!

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Official prerelease Stockfish dev-20260504
Rating Chess Engines Diary CEDR=3755.7

Great news for chess enthusiasts! 
The pre-release version of Stockfish dev-20260504, 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-20260504 version?

Update main network to nn-fcf986aea78a.nnue
Passed STC:
https://tests.stockfishchess.org/tests/view/69ef80071e5788938e86a302
LLR: 2.96 (-2.94,2.94) <0.00,2.00>
Total: 32000 W: 8549 L: 8231 D: 15220
Ptnml(0-2): 124, 3717, 8024, 3987, 148

Passed LTC:
https://tests.stockfishchess.org/tests/view/69f046ba1e5788938e86a42f
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 149646 W: 38739 L: 38186 D: 72721
Ptnml(0-2): 119, 16353, 41326, 16906, 119

New trainer:
official-stockfish/nnue-pytorch#430
Recipe:
TonyCongqianWang/nettest@104ed33
closes https://github.com/official-stockfish/Stockfish/pull/6790
Bench: 2344696



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



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