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Adjust usage of previous statscore in bonus assignments

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This patch adjusts usage of previous statscore for bonus assginments - allowing
it for any statscores and clamping it to wider range.

Passed STC:
https://tests.stockfishchess.org/tests/view/66892e76e59d990b103f6a91
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 431520 W: 111767 L: 110872 D: 208881
Ptnml(0-2): 1180, 51165, 110133, 52144, 1138

Passed LTC:
https://tests.stockfishchess.org/tests/view/66897176e59d990b103f9605
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 143184 W: 36463 L: 35929 D: 70792
Ptnml(0-2): 55, 15540, 39863, 16084, 50

closes https://github.com/official-stockfish/Stockfish/pull/5455

bench 1330556
This commit is contained in:
Michael Chaly 2024-07-06 22:21:33 +03:00 • committed by Joost VandeVondele
parent bb9b65408f
commit 75c8cb2c2f
1 changed files with 1 additions and 2 deletions
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3
src/search.cpp
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@ -1373,8 +1373,7 @@ moves_loop: // When in check, search starts here
+ 153 * (!(ss - 1)->inCheck && bestValue <= -(ss - 1)->staticEval - 76));
// Proportional to "how much damage we have to undo"
if ((ss - 1)->statScore < -7865)
bonus += std::clamp(-(ss - 1)->statScore / 103, 0, 258);
bonus += std::clamp(-(ss - 1)->statScore / 100, -50, 274);
update_continuation_histories(ss - 1, pos.piece_on(prevSq), prevSq,
stat_bonus(depth) * bonus / 100);