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Clean up corrhist

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Passed Non-regression STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 89056 W: 23225 L: 23067 D: 42764
Ptnml(0-2): 292, 9688, 24470, 9726, 352
https://tests.stockfishchess.org/tests/view/679816b2ae346be6da0ee8e7

closes https://github.com/official-stockfish/Stockfish/pull/5830

Bench: 1767398
This commit is contained in:
Shawn Xu
2025-01-27 15:24:37 -08:00
committed by Disservin
parent f50d52aa7f
commit 4a77fb213f
2 changed files with 28 additions and 24 deletions
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src/search.cpp
+26 -17
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@@ -83,11 +83,11 @@ constexpr int futility_move_count(bool improving, Depth depth) {
return (3 + depth * depth) / (2 - improving);
}
int correction_value(const Worker& w, const Position& pos, const Stack* ss) {
int correction_value(const Worker& w, const Position& pos, const Stack* const 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 micv = w.minorPieceCorrectionHistory[us][minor_piece_index(pos)];
const auto pcv = w.pawnCorrectionHistory[pawn_structure_index<Correction>(pos)][us];
const auto micv = w.minorPieceCorrectionHistory[minor_piece_index(pos)][us];
const auto wnpcv = w.nonPawnCorrectionHistory[WHITE][non_pawn_index<WHITE>(pos)][us];
const auto bnpcv = w.nonPawnCorrectionHistory[BLACK][non_pawn_index<BLACK>(pos)][us];
const auto cntcv =
@@ -99,10 +99,31 @@ int correction_value(const Worker& w, const Position& pos, const Stack* ss) {
// Add correctionHistory value to raw staticEval and guarantee evaluation
// does not hit the tablebase range.
Value to_corrected_static_eval(Value v, const int cv) {
Value to_corrected_static_eval(const Value v, const int cv) {
return std::clamp(v + cv / 131072, VALUE_TB_LOSS_IN_MAX_PLY + 1, VALUE_TB_WIN_IN_MAX_PLY - 1);
}
void update_correction_history(const Position& pos,
Stack* const ss,
Search::Worker& workerThread,
const int bonus) {
const Move m = (ss - 1)->currentMove;
const Color us = pos.side_to_move();
static constexpr int nonPawnWeight = 165;
workerThread.pawnCorrectionHistory[pawn_structure_index<Correction>(pos)][us]
<< bonus * 114 / 128;
workerThread.minorPieceCorrectionHistory[minor_piece_index(pos)][us] << bonus * 146 / 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;
}
// History and stats update bonus, based on depth
int stat_bonus(Depth d) { return std::min(154 * d - 102, 1661); }
@@ -1429,21 +1450,9 @@ moves_loop: // When in check, search starts here
&& ((bestValue < ss->staticEval && bestValue < beta) // negative correction & no fail high
|| (bestValue > ss->staticEval && bestMove))) // positive correction & no fail low
{
const auto m = (ss - 1)->currentMove;
constexpr int nonPawnWeight = 165;
auto bonus = std::clamp(int(bestValue - ss->staticEval) * depth / 8,
-CORRECTION_HISTORY_LIMIT / 4, CORRECTION_HISTORY_LIMIT / 4);
thisThread->pawnCorrectionHistory[us][pawn_structure_index<Correction>(pos)]
<< bonus * 114 / 128;
thisThread->minorPieceCorrectionHistory[us][minor_piece_index(pos)] << bonus * 146 / 128;
thisThread->nonPawnCorrectionHistory[WHITE][non_pawn_index<WHITE>(pos)][us]
<< bonus * nonPawnWeight / 128;
thisThread->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;
update_correction_history(pos, ss, *thisThread, bonus);
}
assert(bestValue > -VALUE_INFINITE && bestValue < VALUE_INFINITE);