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increase futility value when capturing last moved piece

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Passed STC:
LLR: 2.95 (-2.94,2.94) <0.00,2.00>
Total: 204320 W: 53059 L: 52500 D: 98761
Ptnml(0-2): 551, 23874, 52778, 24379, 578
https://tests.stockfishchess.org/tests/view/688618ae966ed85face24976

Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 138582 W: 35748 L: 35225 D: 67609
Ptnml(0-2): 62, 14874, 38900, 15389, 66
https://tests.stockfishchess.org/tests/view/68862717966ed85face249f2

closes https://github.com/official-stockfish/Stockfish/pull/6190

Bench: 2894413
This commit is contained in:
Nonlinear2
2025-07-28 19:52:40 +02:00
committed by Joost VandeVondele
parent 9045fdb227
commit 2e2d2778fc
1 changed files with 3 additions and 2 deletions
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src/search.cpp
+3 -2
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@@ -1040,8 +1040,9 @@ moves_loop: // When in check, search starts here
// Futility pruning for captures
if (!givesCheck && lmrDepth < 7 && !ss->inCheck)
{
Value futilityValue = ss->staticEval + 222 + 216 * lmrDepth
+ PieceValue[capturedPiece] + 131 * captHist / 1024;
Value futilityValue = ss->staticEval + 225 + 220 * lmrDepth
+ 275 * (move.to_sq() == prevSq) + PieceValue[capturedPiece]
+ 131 * captHist / 1024;
if (futilityValue <= alpha)
continue;
}