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Simplify futility pruning term

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Passed simplification STC
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 49920 W: 12933 L: 12727 D: 24260
Ptnml(0-2): 141, 5865, 12752, 6051, 151
https://tests.stockfishchess.org/tests/view/681d01d33629b02d74b1756e

Passed simplification LTC
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 68808 W: 17573 L: 17402 D: 33833
Ptnml(0-2): 23, 7343, 19511, 7494, 33
https://tests.stockfishchess.org/tests/view/681e33843629b02d74b176b1

closes https://github.com/official-stockfish/Stockfish/pull/6058

Bench: 2041086
This commit is contained in:
Daniel Monroe
2025-05-13 20:42:36 +02:00
committed by Disservin
parent 40ef7b1212
commit 1f9af9966f
1 changed files with 2 additions and 3 deletions
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src/search.cpp
+2 -3
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@@ -1077,9 +1077,8 @@ moves_loop: // When in check, search starts here
lmrDepth += history / 3388;
Value futilityValue =
ss->staticEval + (bestMove ? 46 : 138) + 117 * lmrDepth
+ 102 * (bestValue < ss->staticEval - 127 && ss->staticEval > alpha - 50);
Value futilityValue = ss->staticEval + (bestMove ? 46 : 138) + 117 * lmrDepth
+ 102 * (ss->staticEval > alpha);
// Futility pruning: parent node
// (*Scaler): Generally, more frequent futility pruning