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Remove redundant max operation on lmrDepth

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Removed a restriction that prohibited history heuristics sum in futility
pruning to exceed some negative value.

Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 279040 W: 71095 L: 71143 D: 136802
Ptnml(0-2): 949, 33574, 70474, 33622, 901
https://tests.stockfishchess.org/tests/view/65aaef4c79aa8af82b977631

Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 75156 W: 18884 L: 18715 D: 37557
Ptnml(0-2): 52, 8445, 20408, 8628, 45
https://tests.stockfishchess.org/tests/view/65ae7ef3c865510db026abf5

closes https://github.com/official-stockfish/Stockfish/pull/5004

Bench: 1566543
This commit is contained in:
FauziAkram 2024-01-23 13:39:06 +03:00 • committed by Disservin
parent a6fd17f27d
commit 2b62c4452d
1 changed files with 0 additions and 1 deletions
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src/search.cpp
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@ -1032,7 +1032,6 @@ moves_loop: // When in check, search starts here
history += 69 * thisThread->mainHistory[us][move.from_to()] / 32;
lmrDepth += history / 6992;
lmrDepth = std::max(lmrDepth, -1);
// Futility pruning: parent node (~13 Elo)
if (!ss->inCheck && lmrDepth < 15