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Check Extension with Static Evaluation

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extension for checking moves, at higher depth and more decisive positions.

stc:
LLR: 2.97 (-2.94,2.94) <-0.50,2.50>
Total: 87008 W: 7337 L: 7100 D: 72571
Ptnml(0-2): 264, 5737, 31270, 5964, 269
https://tests.stockfishchess.org/tests/view/60b1034787a1a67ae56c47b6

ltc:
LLR: 2.94 (-2.94,2.94) <0.50,3.50>
Total: 79320 W: 2629 L: 2432 D: 74259
Ptnml(0-2): 29, 2205, 35000, 2392, 34
https://tests.stockfishchess.org/tests/view/60b1ae0b87a1a67ae56c487c

closes https://github.com/official-stockfish/Stockfish/pull/3514

Bench: 4447112
This commit is contained in:
candirufish 2021-05-31 06:47:35 +02:00 • committed by Joost VandeVondele
parent 5448cad29e
commit e8418bb1b9
1 changed files with 4 additions and 0 deletions
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4
src/search.cpp
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@ -1097,6 +1097,10 @@ moves_loop: // When in check, search starts from here
return beta;
}
}
else if ( givesCheck
&& depth > 6
&& abs(ss->staticEval) > Value(100))
extension = 1;
// Add extension to new depth
newDepth += extension;