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Simplify Probcut Clamp Further

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Passed Non-regression STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 157984 W: 41116 L: 41030 D: 75838
Ptnml(0-2): 568, 18570, 40601, 18714, 539
https://tests.stockfishchess.org/tests/view/68b750518f94a4e5a7fe76cd

Passed Non-regression LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 335232 W: 85443 L: 85543 D: 164246
Ptnml(0-2): 177, 36616, 94137, 36502, 184
https://tests.stockfishchess.org/tests/view/68bc767259efc3c96b61076b

closes https://github.com/official-stockfish/Stockfish/pull/6303

Bench: 2213844
This commit is contained in:
Shawn Xu
2025-09-28 21:12:01 +02:00
committed by Joost VandeVondele
parent 7a36c0e95f
commit 415a1ad426
1 changed files with 1 additions and 2 deletions
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src/search.cpp
+1 -2
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@@ -920,8 +920,7 @@ Value Search::Worker::search(
assert(probCutBeta < VALUE_INFINITE && probCutBeta > beta);
MovePicker mp(pos, ttData.move, probCutBeta - ss->staticEval, &captureHistory);
Depth dynamicReduction = std::max((ss->staticEval - beta) / 306, -1);
Depth probCutDepth = std::max(depth - 5 - dynamicReduction, 0);
Depth probCutDepth = std::clamp(depth - 5 - (ss->staticEval - beta) / 306, 0, depth);
while ((move = mp.next_move()) != Move::none())
{