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Late move reduction, captures and CUT nodes

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Expand of Stefan Geschwentner's original idea: we always do LMR for captures at cutnodes.

Passed STC
http://tests.stockfishchess.org/tests/view/5d5b2f8e0ebc5925cf1111b8
LLR: 2.96 (-2.94,2.94) [0.50,4.50]
Total: 36026 W: 8122 L: 7779 D: 20125

Passed LTC
http://tests.stockfishchess.org/tests/view/5d5b40c80ebc5925cf111353
LLR: 3.22 (-2.94,2.94) [0.00,3.50]
Total: 133502 W: 22508 L: 21943 D: 89051

Closes https://github.com/official-stockfish/Stockfish/pull/2273

Bench: 3494372
This commit is contained in:
Vizvezdenec 2019-08-21 08:30:48 +03:00 • committed by Stéphane Nicolet
parent 18279b24fc
commit 10d2ebc6ae
1 changed files with 2 additions and 1 deletions
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3
src/search.cpp
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@ -1074,7 +1074,8 @@ moves_loop: // When in check, search starts from here
&& moveCount > 1 + 3 * rootNode && moveCount > 1 + 3 * rootNode
&& ( !captureOrPromotion && ( !captureOrPromotion
|| moveCountPruning || moveCountPruning
|| ss->staticEval + PieceValue[EG][pos.captured_piece()] <= alpha)) || ss->staticEval + PieceValue[EG][pos.captured_piece()] <= alpha
|| cutNode))
{ {
Depth r = reduction(improving, depth, moveCount); Depth r = reduction(improving, depth, moveCount);