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Remove major corrhist

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Remove major correction history and slightly increase all other
correction weights.

Passed STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 50080 W: 13171 L: 12959 D: 23950
Ptnml(0-2): 196, 5998, 12462, 6166, 218
https://tests.stockfishchess.org/tests/live_elo/67954526406a4efe9eb7d176

Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 51504 W: 13188 L: 12995 D: 25321
Ptnml(0-2): 54, 5658, 14128, 5865, 47
https://tests.stockfishchess.org/tests/live_elo/67954961406a4efe9eb7d251

closes https://github.com/official-stockfish/Stockfish/pull/5822

Bench: 2081366
This commit is contained in:
Martin Novák
2025-01-25 21:09:45 +01:00
committed by Disservin
parent 69be04d38e
commit 831cb01cea
5 changed files with 5 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/search.cpp
+1 -4
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@@ -87,7 +87,6 @@ int correction_value(const Worker& w, const Position& pos, const Stack* ss) {
const Color us = pos.side_to_move();
const auto m = (ss - 1)->currentMove;
const auto pcv = w.pawnCorrectionHistory[us][pawn_structure_index<Correction>(pos)];
const auto macv = w.majorPieceCorrectionHistory[us][major_piece_index(pos)];
const auto micv = w.minorPieceCorrectionHistory[us][minor_piece_index(pos)];
const auto wnpcv = w.nonPawnCorrectionHistory[WHITE][non_pawn_index<WHITE>(pos)][us];
const auto bnpcv = w.nonPawnCorrectionHistory[BLACK][non_pawn_index<BLACK>(pos)][us];
@@ -95,7 +94,7 @@ int correction_value(const Worker& w, const Position& pos, const Stack* ss) {
m.is_ok() ? (*(ss - 2)->continuationCorrectionHistory)[pos.piece_on(m.to_sq())][m.to_sq()]
: 0;
return (6922 * pcv + 3837 * macv + 6238 * micv + 7490 * (wnpcv + bnpcv) + 6270 * cntcv);
return (7000 * pcv + 6300 * micv + 7550 * (wnpcv + bnpcv) + 6320 * cntcv);
}
// Add correctionHistory value to raw staticEval and guarantee evaluation
@@ -516,7 +515,6 @@ void Search::Worker::clear() {
captureHistory.fill(-631);
pawnHistory.fill(-1210);
pawnCorrectionHistory.fill(0);
majorPieceCorrectionHistory.fill(0);
minorPieceCorrectionHistory.fill(0);
nonPawnCorrectionHistory[WHITE].fill(0);
nonPawnCorrectionHistory[BLACK].fill(0);
@@ -1439,7 +1437,6 @@ moves_loop: // When in check, search starts here
-CORRECTION_HISTORY_LIMIT / 4, CORRECTION_HISTORY_LIMIT / 4);
thisThread->pawnCorrectionHistory[us][pawn_structure_index<Correction>(pos)]
<< bonus * 114 / 128;
thisThread->majorPieceCorrectionHistory[us][major_piece_index(pos)] << bonus * 163 / 128;
thisThread->minorPieceCorrectionHistory[us][minor_piece_index(pos)] << bonus * 146 / 128;
thisThread->nonPawnCorrectionHistory[WHITE][non_pawn_index<WHITE>(pos)][us]
<< bonus * nonPawnWeight / 128;