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Yeet psqt weights

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Simplifying the ratio in the eval between the psqt and the positional eval to a basic addition

Passed Nonreg STC:
https://tests.stockfishchess.org/tests/view/6a3eaac63036e45021aeb937
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 207392 W: 53521 L: 53489 D: 100382
Ptnml(0-2): 585, 24412, 53748, 24288, 663

Passed Nonreg LTC:
https://tests.stockfishchess.org/tests/view/6a423666f97ff95f7879508e
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 27198 W: 7200 L: 6989 D: 13009
Ptnml(0-2): 12, 2794, 7779, 2999, 15

closes https://github.com/official-stockfish/Stockfish/pull/6934

Bench: 2067208
This commit is contained in:
yl25946
2026-06-30 06:22:29 +02:00
committed by Joost VandeVondele
parent 4488343cf6
commit 6088838797
1 changed files with 1 additions and 1 deletions
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src/evaluate.cpp
+1 -1
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@@ -48,7 +48,7 @@ Value Eval::evaluate(const Eval::NNUE::Network& network,
auto [psqt, positional] = network.evaluate(pos, accumulators, caches); auto [psqt, positional] = network.evaluate(pos, accumulators, caches);
Value nnue = (125 * psqt + 131 * positional) / 128; Value nnue = psqt + positional;
// Blend optimism and eval with nnue complexity // Blend optimism and eval with nnue complexity
int nnueComplexity = std::abs(psqt - positional); int nnueComplexity = std::abs(psqt - positional);