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Simplify history term in futility pruning

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Passed simplification STC
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 298816 W: 76814 L: 76881 D: 145121
Ptnml(0-2): 726, 35477, 77057, 35434, 714
https://tests.stockfishchess.org/tests/view/683f440f6ec7634154f9dc7f

Passed simplification LTC
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 237774 W: 60801 L: 60802 D: 116171
Ptnml(0-2): 91, 26088, 66532, 26083, 93
https://tests.stockfishchess.org/tests/view/68441189ffbc71bd236778de

closes https://github.com/official-stockfish/Stockfish/pull/6130

Bench: 2411502
This commit is contained in:
Daniel Monroe
2025-06-03 11:50:26 -07:00
committed by Disservin
parent 34b75f1575
commit a7a56c41f6
1 changed files with 1 additions and 1 deletions
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2
src/search.cpp
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@@ -1083,7 +1083,7 @@ moves_loop: // When in check, search starts here
lmrDepth += history / 3388; lmrDepth += history / 3388;
Value baseFutility = (bestMove ? 46 : 138 + std::abs(history / 300)); Value baseFutility = (bestMove ? 46 : 230);
Value futilityValue = Value futilityValue =
ss->staticEval + baseFutility + 117 * lmrDepth + 102 * (ss->staticEval > alpha); ss->staticEval + baseFutility + 117 * lmrDepth + 102 * (ss->staticEval > alpha);