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Simplify threat term in movepick

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Passed simplification STC
LLR: 2.97 (-2.94,2.94) <-1.75,0.25>
Total: 71296 W: 18605 L: 18419 D: 34272
Ptnml(0-2): 250, 8374, 18183, 8622, 219
https://tests.stockfishchess.org/tests/view/690454c7ea4b268f1fac1bbe

Passed simplification LTC
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 240552 W: 61870 L: 61874 D: 116808
Ptnml(0-2): 113, 26300, 67460, 26284, 119
https://tests.stockfishchess.org/tests/view/69063956ea4b268f1fac1f66

closes https://github.com/official-stockfish/Stockfish/pull/6401

bench 2697501
This commit is contained in:
Daniel Monroe
2025-11-13 22:35:33 +01:00
committed by Joost VandeVondele
parent 55643baa3f
commit 9e38023a8c
1 changed files with 2 additions and 3 deletions
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src/movepick.cpp
+2 -3
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@@ -171,9 +171,8 @@ ExtMove* MovePicker::score(MoveList<Type>& ml) {
// penalty for moving to a square threatened by a lesser piece
// or bonus for escaping an attack by a lesser piece.
static constexpr int bonus[KING + 1] = {0, 0, 144, 144, 256, 517, 10000};
int v = threatByLesser[pt] & to ? -95 : 100 * bool(threatByLesser[pt] & from);
m.value += bonus[pt] * v;
int v = threatByLesser[pt] & to ? -19 : 20 * bool(threatByLesser[pt] & from);
m.value += PieceValue[pt] * v;
if (ply < LOW_PLY_HISTORY_SIZE)