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Don't defer Threads and Hash update until 'ucinewgame' #1655

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Merged
merged 2 commits into from
Apr 11, 2025
Merged

Don't defer Threads and Hash update until 'ucinewgame' #1655

merged 2 commits into from
Apr 11, 2025

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eduherminio
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@eduherminio eduherminio commented Apr 11, 2025 •
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There's no UCI isready after ucinewgame, so these 2 initializations currently take time from the engine's first search.
That explains why sometimes the first STC game ends up in a loss on time.

Test  | stop-deferring-hash-threads-update-until-ucinewgame
Elo   | -1.49 +- 3.54 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=32MB
LLR   | 2.99 (-2.25, 2.89) [-10.00, 0.00]
Games | 13990: +3608 -3668 =6714
Penta | [247, 1691, 3178, 1633, 246]
https://openbench.lynx-chess.com/test/1590/

@eduherminio eduherminio marked this pull request as ready for review April 11, 2025 18:17
@eduherminio eduherminio merged commit ba863f2 into main Apr 11, 2025
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@eduherminio eduherminio deleted the stop-deferring-hash-threads-update-until-ucinewgame branch April 11, 2025 19:22
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