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Simplify bonusScale formula

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Passed STC:
https://tests.stockfishchess.org/tests/view/679ea7bc0774dfd78deb0d68
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 47680 W: 12575 L: 12364 D: 22741
Ptnml(0-2): 179, 5589, 12139, 5708, 225

Passed LTC:
https://tests.stockfishchess.org/tests/view/679eb7760774dfd78deb0dbb
LLR: 2.96 (-2.94,2.94) <-1.75,0.25>
Total: 314220 W: 80110 L: 80189 D: 153921
Ptnml(0-2): 265, 35121, 86420, 35036, 268

closes https://github.com/official-stockfish/Stockfish/pull/5849

Bench: 3161782
This commit is contained in:
Nonlinear2
2025-02-02 20:18:21 +01:00
committed by Disservin
parent fccc6f624e
commit 9ed1725e78
1 changed files with 4 additions and 4 deletions
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src/search.cpp
+4 -4
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@@ -1399,10 +1399,10 @@ moves_loop: // When in check, search starts here
// Bonus for prior countermove that caused the fail low
else if (!priorCapture && prevSq != SQ_NONE)
{
int bonusScale = (118 * (depth > 5) + 37 * !allNode + 169 * ((ss - 1)->moveCount > 8)
+ 128 * (!ss->inCheck && bestValue <= ss->staticEval - 102)
+ 115 * (!(ss - 1)->inCheck && bestValue <= -(ss - 1)->staticEval - 82)
+ 80 * ((ss - 1)->isTTMove) + std::min(-(ss - 1)->statScore / 106, 318));
int bonusScale = (125 * (depth > 5) + 176 * ((ss - 1)->moveCount > 8)
+ 135 * (!ss->inCheck && bestValue <= ss->staticEval - 102)
+ 122 * (!(ss - 1)->inCheck && bestValue <= -(ss - 1)->staticEval - 82)
+ 87 * ((ss - 1)->isTTMove) + std::min(-(ss - 1)->statScore / 106, 318));
bonusScale = std::max(bonusScale, 0);