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change the bonusScale depth component

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Passed STC:
https://tests.stockfishchess.org/tests/view/67d35f66517865b4a2dfc801
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 110816 W: 28875 L: 28449 D: 53492
Ptnml(0-2): 329, 13064, 28231, 13420, 364

Passed LTC:
https://tests.stockfishchess.org/tests/view/67d4bdf0517865b4a2dfd131
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 121824 W: 31047 L: 30559 D: 60218
Ptnml(0-2): 52, 13056, 34214, 13532, 58

closes https://github.com/official-stockfish/Stockfish/pull/5932

Bench: 2128807
This commit is contained in:
Nonlinear2
2025-03-21 11:21:10 +01:00
committed by Disservin
parent 9045f17c3f
commit 43d8ccf856
1 changed files with 2 additions and 1 deletions
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src/search.cpp
+2 -1
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@@ -1445,7 +1445,8 @@ moves_loop: // When in check, search starts here
// Bonus for prior quiet countermove that caused the fail low
else if (!priorCapture && prevSq != SQ_NONE)
{
int bonusScale = (112 * (depth > 5) + 34 * !allNode + 164 * ((ss - 1)->moveCount > 8)
int bonusScale = (std::clamp(160 * (depth - 4) / 2, 0, 200) + 34 * !allNode
+ 164 * ((ss - 1)->moveCount > 8)
+ 141 * (!ss->inCheck && bestValue <= ss->staticEval - 100)
+ 121 * (!(ss - 1)->inCheck && bestValue <= -(ss - 1)->staticEval - 75)
+ 86 * ((ss - 1)->isTTMove) + 86 * (ss->cutoffCnt <= 3)