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Remove a cutNode condition

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Allow some nodes to spawn even deeper lmr searches, also for cutNodes

Passed STC:
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 59072 W: 15387 L: 15190 D: 28495
Ptnml(0-2): 145, 6956, 15166, 7095, 174
https://tests.stockfishchess.org/tests/view/6810b4c13629b02d74b16714

Passed LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 93294 W: 23737 L: 23591 D: 45966
Ptnml(0-2): 47, 10116, 26169, 10274, 41
https://tests.stockfishchess.org/tests/view/681170613629b02d74b167f3

closes https://github.com/official-stockfish/Stockfish/pull/6052

Bench: 1937565
This commit is contained in:
FauziAkram
2025-05-04 20:02:58 +03:00
committed by Disservin
parent 63a2ab1510
commit d4b405a5a6
1 changed files with 1 additions and 1 deletions
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2
src/search.cpp
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@@ -1237,7 +1237,7 @@ moves_loop: // When in check, search starts here
// std::clamp has been replaced by a more robust implementation. // std::clamp has been replaced by a more robust implementation.
Depth d = std::max(1, std::min(newDepth - r / 1024, Depth d = std::max(1, std::min(newDepth - r / 1024,
newDepth + !allNode + (PvNode && !bestMove))) newDepth + !allNode + (PvNode && !bestMove)))
+ (!cutNode && (ss - 1)->isPvNode && moveCount < 8); + ((ss - 1)->isPvNode && moveCount < 8);
ss->reduction = newDepth - d; ss->reduction = newDepth - d;
value = -search<NonPV>(pos, ss + 1, -(alpha + 1), -alpha, d, true); value = -search<NonPV>(pos, ss + 1, -(alpha + 1), -alpha, d, true);