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Simplify indexing

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Removes 1 function (from_to) from the Move type, change them to simpler raw.
Remove the "and" use in the correction history structure calculation. Adjust
the indexing.

Passed simplification STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 42880 W: 11327 L: 11113 D: 20440
Ptnml(0-2): 161, 4852, 11212, 5042, 173
https://tests.stockfishchess.org/tests/view/690593b8ea4b268f1fac1e8a

Passed simplification LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 43560 W: 11276 L: 11079 D: 21205
Ptnml(0-2): 17, 4679, 12197, 4864, 23
https://tests.stockfishchess.org/tests/view/6906f819ea4b268f1fac216b

closes https://github.com/official-stockfish/Stockfish/pull/6391

Bench: 2523092
This commit is contained in:
AliceRoselia
2025-11-14 17:28:17 +01:00
committed by Joost VandeVondele
parent df88db16c6
commit 7b7a9485d6
4 changed files with 21 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/movepick.cpp
+4 -4
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@@ -158,7 +158,7 @@ ExtMove* MovePicker::score(MoveList<Type>& ml) {
else if constexpr (Type == QUIETS)
{
// histories
m.value = 2 * (*mainHistory)[us][m.from_to()];
m.value = 2 * (*mainHistory)[us][m.raw()];
m.value += 2 * (*pawnHistory)[pawn_history_index(pos)][pc][to];
m.value += (*continuationHistory[0])[pc][to];
m.value += (*continuationHistory[1])[pc][to];
@@ -176,7 +176,7 @@ ExtMove* MovePicker::score(MoveList<Type>& ml) {
if (ply < LOW_PLY_HISTORY_SIZE)
m.value += 8 * (*lowPlyHistory)[ply][m.from_to()] / (1 + ply);
m.value += 8 * (*lowPlyHistory)[ply][m.raw()] / (1 + ply);
}
else // Type == EVASIONS
@@ -185,9 +185,9 @@ ExtMove* MovePicker::score(MoveList<Type>& ml) {
m.value = PieceValue[capturedPiece] + (1 << 28);
else
{
m.value = (*mainHistory)[us][m.from_to()] + (*continuationHistory[0])[pc][to];
m.value = (*mainHistory)[us][m.raw()] + (*continuationHistory[0])[pc][to];
if (ply < LOW_PLY_HISTORY_SIZE)
m.value += (*lowPlyHistory)[ply][m.from_to()];
m.value += (*lowPlyHistory)[ply][m.raw()];
}
}
}