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Simplify movepick coefficients

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This commit sets movepick weights for all continuation histories to 1
and doubles the weight for the main history, inspired by a recent tune.

Passed STC
https://tests.stockfishchess.org/tests/view/6735151a86d5ee47d953eaa2
LLR: 2.92 (-2.94,2.94) <-1.75,0.25>
Total: 29984 W: 7840 L: 7612 D: 14532
Ptnml(0-2): 85, 3511, 7571, 3741, 84

Passed LTC
https://tests.stockfishchess.org/tests/view/673667a986d5ee47d953ec78
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 26268 W: 6726 L: 6510 D: 13032
Ptnml(0-2): 16, 2797, 7288, 3021, 12

closes https://github.com/official-stockfish/Stockfish/pull/5680

Bench: 1130293
This commit is contained in:
Daniel Monroe 2024-11-13 12:56:29 -08:00 • committed by Disservin
parent b7f17346e5
commit 55905e562a
1 changed files with 3 additions and 3 deletions
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6
src/movepick.cpp
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@ -158,11 +158,11 @@ void MovePicker::score() {
Square to = m.to_sq(); Square to = m.to_sq();
// histories // histories
m.value = (*mainHistory)[pos.side_to_move()][m.from_to()]; m.value = 2 * (*mainHistory)[pos.side_to_move()][m.from_to()];
m.value += 2 * (*pawnHistory)[pawn_structure_index(pos)][pc][to]; m.value += 2 * (*pawnHistory)[pawn_structure_index(pos)][pc][to];
m.value += 2 * (*continuationHistory[0])[pc][to]; m.value += (*continuationHistory[0])[pc][to];
m.value += (*continuationHistory[1])[pc][to]; m.value += (*continuationHistory[1])[pc][to];
m.value += (*continuationHistory[2])[pc][to] / 3; m.value += (*continuationHistory[2])[pc][to];
m.value += (*continuationHistory[3])[pc][to]; m.value += (*continuationHistory[3])[pc][to];
m.value += (*continuationHistory[5])[pc][to]; m.value += (*continuationHistory[5])[pc][to];