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Simplify LMR multiThread condition

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STC (8 threads):
LLR: 2.95 (-2.94,2.94) <-2.50,0.50>
Total: 110584 W: 27818 L: 27807 D: 54959
Ptnml(0-2): 156, 12089, 30791, 12100, 156
https://tests.stockfishchess.org/tests/view/6172ef436ce927be325583a9

LTC (8 threads):
LLR: 2.94 (-2.94,2.94) <-2.50,0.50>
Total: 23632 W: 6025 L: 5903 D: 11704
Ptnml(0-2): 5, 2292, 7100, 2414, 5
https://tests.stockfishchess.org/tests/view/6173cf096ce927be32558412

closes https://github.com/official-stockfish/Stockfish/pull/3757

No functional change (in the single-threaded case)
Bench: 6689428
This commit is contained in:
bmc4 2021-10-23 09:22:41 -03:00 • committed by Stéphane Nicolet
parent fc8213c7df
commit 1163d972a9
1 changed files with 3 additions and 4 deletions
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7
src/search.cpp
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@ -1159,10 +1159,9 @@ moves_loop: // When in check, search starts here
// cases where we extend a son if it has good chances to be "interesting".
if ( depth >= 3
&& moveCount > 1 + 2 * rootNode
&& ( !captureOrPromotion
|| (cutNode && (ss-1)->moveCount > 1)
|| !ss->ttPv)
&& (!PvNode || ss->ply > 1 || thisThread->id() % 4 != 3))
&& ( !ss->ttPv
|| !captureOrPromotion
|| (cutNode && (ss-1)->moveCount > 1)))
{
Depth r = reduction(improving, depth, moveCount, rangeReduction > 2);