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Tweak capture LMR.

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Apply the recently added LMR condition for captures at nodes which are not PV or former PV nodes only if capture history is not too good.

STC:
LLR: 2.96 (-2.94,2.94) {-0.25,1.25}
Total: 95296 W: 8917 L: 8660 D: 77719
Ptnml(0-2): 323, 6871, 33045, 7044, 365
https://tests.stockfishchess.org/tests/view/5feca7f46019e097de3ee9ae

LTC:
LLR: 2.95 (-2.94,2.94) {0.25,1.25}
Total: 29216 W: 1172 L: 1034 D: 27010
Ptnml(0-2): 11, 946, 12568, 1060, 23
https://tests.stockfishchess.org/tests/view/5fecf1786019e097de3ee9d5

closes https://github.com/official-stockfish/Stockfish/pull/3283

Bench: 4006138
This commit is contained in:
Stefan Geschwentner 2020-12-31 01:45:37 +01:00 • committed by Joost VandeVondele
parent 51deae8998
commit 4262461457
1 changed files with 1 additions and 1 deletions
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2
src/search.cpp
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@ -1172,7 +1172,7 @@ moves_loop: // When in check, search starts from here
|| moveCountPruning || moveCountPruning
|| ss->staticEval + PieceValue[EG][pos.captured_piece()] <= alpha || ss->staticEval + PieceValue[EG][pos.captured_piece()] <= alpha
|| cutNode || cutNode
|| (!PvNode && !formerPv) || (!PvNode && !formerPv && thisThread->captureHistory[movedPiece][to_sq(move)][type_of(pos.captured_piece())] < 4506)
|| thisThread->ttHitAverage < 432 * TtHitAverageResolution * TtHitAverageWindow / 1024)) || thisThread->ttHitAverage < 432 * TtHitAverageResolution * TtHitAverageWindow / 1024))
{ {
Depth r = reduction(improving, depth, moveCount); Depth r = reduction(improving, depth, moveCount);