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Simplify material difference in evaluate

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STC: https://tests.stockfishchess.org/tests/view/64d166235b17f7c21c0ddc15
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 100032 W: 25698 L: 25547 D: 48787
Ptnml(0-2): 308, 11748, 25771, 11863, 326

LTC: https://tests.stockfishchess.org/tests/view/64d28c085b17f7c21c0df775
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 123870 W: 31463 L: 31348 D: 61059
Ptnml(0-2): 63, 13487, 34719, 13604, 62

Besides rebasing I replaced PawnValueMg w/ 126 explicitly to decouple from https://tests.stockfishchess.org/tests/view/64d212de5b17f7c21c0debbb by @peregrineshahin which also passed. #4734

closes https://github.com/official-stockfish/Stockfish/pull/4731

Bench: 1447866
This commit is contained in:
mstembera 2023-08-09 11:48:33 -07:00 • committed by Disservin
parent 3322349c1a
commit 9b80897657
1 changed files with 2 additions and 5 deletions
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7
src/evaluate.cpp
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@ -152,11 +152,8 @@ Value Eval::evaluate(const Position& pos) {
Value nnue = NNUE::evaluate(pos, true, &nnueComplexity);
int material = 67 * (pos.count<PAWN>(stm) - pos.count<PAWN>(~stm))
+ 395 * (pos.count<KNIGHT>(stm) - pos.count<KNIGHT>(~stm))
+ 288 * (pos.count<BISHOP>(stm) - pos.count<BISHOP>(~stm))
+ 630 * (pos.count<ROOK>(stm) - pos.count<ROOK>(~stm))
+ 857 * (pos.count<QUEEN>(stm) - pos.count<QUEEN>(~stm));
int material = pos.non_pawn_material(stm) - pos.non_pawn_material(~stm)
+ 126 * (pos.count<PAWN>(stm) - pos.count<PAWN>(~stm));
// Blend optimism with nnue complexity and (semi)classical complexity
optimism += optimism * (nnueComplexity + abs(material - nnue)) / 512;