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Add functions to check for decisive scores

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Thanks to peregrineshahin and robbyrobbyrob for their suggestions.

closes https://github.com/official-stockfish/Stockfish/pull/5696

No functional change
This commit is contained in:
Nonlinear2 2024-11-22 11:24:43 +01:00 • committed by Disservin
parent 57e06be71f
commit da82942b54
1 changed files with 3 additions and 1 deletions
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2
src/search.cpp
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@ -1040,6 +1040,8 @@ moves_loop: // When in check, search starts here
// Futility pruning: parent node (~13 Elo) // Futility pruning: parent node (~13 Elo)
if (!ss->inCheck && lmrDepth < 12 && futilityValue <= alpha) if (!ss->inCheck && lmrDepth < 12 && futilityValue <= alpha)
{ {
if (bestValue <= futilityValue && !is_decisive(bestValue)
&& !is_win(futilityValue))
if (bestValue <= futilityValue && !is_decisive(bestValue) if (bestValue <= futilityValue && !is_decisive(bestValue)
&& !is_win(futilityValue)) && !is_win(futilityValue))
bestValue = futilityValue; bestValue = futilityValue;