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Simplifying improving and worsening deduction formulas

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Passed STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 77696 W: 20052 L: 19878 D: 37766
Ptnml(0-2): 222, 9124, 19994, 9274, 234
https://tests.stockfishchess.org/tests/view/66440032bc537f561945171e

Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 234414 W: 58874 L: 58871 D: 116669
Ptnml(0-2): 96, 26147, 64742, 26102, 120
https://tests.stockfishchess.org/tests/view/6644094cbc537f5619451735

closes https://github.com/official-stockfish/Stockfish/pull/5248

Bench: 1336738
This commit is contained in:
FauziAkram 2024-05-15 14:22:36 +03:00 • committed by Disservin
parent 1f3a0fda2e
commit dcb0233784
1 changed files with 2 additions and 2 deletions
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4
src/search.cpp
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@ -60,8 +60,8 @@ static constexpr double EvalLevel[10] = {0.981, 0.956, 0.895, 0.949, 0.913,
// Futility margin // Futility margin
Value futility_margin(Depth d, bool noTtCutNode, bool improving, bool oppWorsening) { Value futility_margin(Depth d, bool noTtCutNode, bool improving, bool oppWorsening) {
Value futilityMult = 131 - 48 * noTtCutNode; Value futilityMult = 131 - 48 * noTtCutNode;
Value improvingDeduction = 57 * improving * futilityMult / 32; Value improvingDeduction = 2 * improving * futilityMult;
Value worseningDeduction = (309 + 52 * improving) * oppWorsening * futilityMult / 1024; Value worseningDeduction = 330 * oppWorsening * futilityMult / 1024;
return futilityMult * d - improvingDeduction - worseningDeduction; return futilityMult * d - improvingDeduction - worseningDeduction;
} }