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Use fail high count for LMR

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Increase reduction if next ply has a lot of fail high else reset count to 0

Passed STC:
https://tests.stockfishchess.org/tests/view/626ea8299116b52aa83b71f6
LLR: 2.94 (-2.94,2.94) <0.00,2.50>
Total: 144288 W: 38377 L: 37902 D: 68009
Ptnml(0-2): 565, 16298, 38054, 16551, 676

Passed LTC:
https://tests.stockfishchess.org/tests/view/626fa0fb79f761bab2e382f0
LLR: 2.98 (-2.94,2.94) <0.50,3.00>
Total: 74872 W: 20050 L: 19686 D: 35136
Ptnml(0-2): 51, 7541, 21893, 7895, 56

closes https://github.com/official-stockfish/Stockfish/pull/4006

bench: 7084802
This commit is contained in:
candirufish
2022-05-03 12:35:21 +02:00
committed by Joost VandeVondele
parent 285a79eaa0
commit a32d2086bc
2 changed files with 10 additions and 0 deletions
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src/search.h
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@@ -54,6 +54,7 @@ struct Stack {
bool ttPv;
bool ttHit;
int doubleExtensions;
int cutoffCnt;
};