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Tweak correction history factors

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The values are taken from this tuning
https://tests.stockfishchess.org/tests/view/679c4e150774dfd78deaf376
which added also a new material correction history. The full tune
doesn't work but ignoring the new history results in this changes.

Passed STC:
LLR: 2.94 (-2.94,2.94) <0.00,2.00>
Total: 102368 W: 27057 L: 26638 D: 48673
Ptnml(0-2): 394, 12031, 25949, 12382, 428
https://tests.stockfishchess.org/tess/view/679d2ca70774dfd78deaf796

Passed LTC:
LLR: 2.96 (-2.94,2.94) <0.50,2.50>
Total: 55044 W: 14215 L: 13855 D: 26974
Ptnml(0-2): 43, 5956, 15172, 6300, 51
https://tests.stockfishchess.org/tests/view/679d30be0774dfd78deafda2

closes https://github.com/official-stockfish/Stockfish/pull/5841

Bench: 3068583
This commit is contained in:
Stefan Geschwentner
2025-01-30 22:36:00 +01:00
committed by Disservin
parent 7690fac5cf
commit c83ddd9e4b
3 changed files with 9 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/history.h
+1 -1
View File
@@ -132,7 +132,7 @@ using PawnHistory = Stats<std::int16_t, 8192, PAWN_HISTORY_SIZE, PIECE_NB, SQUAR
// see https://www.chessprogramming.org/Static_Evaluation_Correction_History
enum CorrHistType {
Pawn, // By color and pawn structure
Minor, // By color and positions of minor pieces (Knight, Bishop) and King
Minor, // By color and positions of minor pieces (Knight, Bishop)
NonPawn, // By non-pawn material positions and color
PieceTo, // By [piece][to] move
Continuation, // Combined history of move pairs
src/position.cpp
+2 -11
View File
@@ -335,6 +335,7 @@ void Position::set_check_info() const {
void Position::set_state() const {
st->key = st->materialKey = 0;
st->minorPieceKey = 0;
st->nonPawnKey[WHITE] = st->nonPawnKey[BLACK] = 0;
st->pawnKey = Zobrist::noPawns;
st->nonPawnMaterial[WHITE] = st->nonPawnMaterial[BLACK] = VALUE_ZERO;
@@ -362,11 +363,6 @@ void Position::set_state() const {
if (type_of(pc) <= BISHOP)
st->minorPieceKey ^= Zobrist::psq[pc][s];
}
else
{
st->minorPieceKey ^= Zobrist::psq[pc][s];
}
}
}
@@ -867,12 +863,7 @@ void Position::do_move(Move m,
{
st->nonPawnKey[us] ^= Zobrist::psq[pc][from] ^ Zobrist::psq[pc][to];
if (type_of(pc) == KING)
{
st->minorPieceKey ^= Zobrist::psq[pc][from] ^ Zobrist::psq[pc][to];
}
else if (type_of(pc) <= BISHOP)
if (type_of(pc) <= BISHOP)
st->minorPieceKey ^= Zobrist::psq[pc][from] ^ Zobrist::psq[pc][to];
}
src/search.cpp
+6 -5
View File
@@ -94,7 +94,7 @@ int correction_value(const Worker& w, const Position& pos, const Stack* const ss
m.is_ok() ? (*(ss - 2)->continuationCorrectionHistory)[pos.piece_on(m.to_sq())][m.to_sq()]
: 0;
return (7000 * pcv + 6300 * micv + 7550 * (wnpcv + bnpcv) + 6320 * cntcv);
return 7037 * pcv + 6671 * micv + 7631 * (wnpcv + bnpcv) + 6362 * cntcv;
}
// Add correctionHistory value to raw staticEval and guarantee evaluation
@@ -110,18 +110,19 @@ void update_correction_history(const Position& pos,
const Move m = (ss - 1)->currentMove;
const Color us = pos.side_to_move();
static constexpr int nonPawnWeight = 165;
static constexpr int nonPawnWeight = 159;
workerThread.pawnCorrectionHistory[pawn_structure_index<Correction>(pos)][us]
<< bonus * 114 / 128;
workerThread.minorPieceCorrectionHistory[minor_piece_index(pos)][us] << bonus * 146 / 128;
<< bonus * 104 / 128;
workerThread.minorPieceCorrectionHistory[minor_piece_index(pos)][us] << bonus * 145 / 128;
workerThread.nonPawnCorrectionHistory[WHITE][non_pawn_index<WHITE>(pos)][us]
<< bonus * nonPawnWeight / 128;
workerThread.nonPawnCorrectionHistory[BLACK][non_pawn_index<BLACK>(pos)][us]
<< bonus * nonPawnWeight / 128;
if (m.is_ok())
(*(ss - 2)->continuationCorrectionHistory)[pos.piece_on(m.to_sq())][m.to_sq()] << bonus;
(*(ss - 2)->continuationCorrectionHistory)[pos.piece_on(m.to_sq())][m.to_sq()]
<< bonus * 146 / 128;
}
// History and stats update bonus, based on depth