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Simplify Probcut Malus

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Passed Non-regression STC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 74880 W: 19261 L: 19083 D: 36536
Ptnml(0-2): 202, 8861, 19120, 9071, 186
https://tests.stockfishchess.org/tests/view/668a0966eca84f4d25864cba

Passed Non-regression LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 263916 W: 66690 L: 66718 D: 130508
Ptnml(0-2): 125, 29348, 73040, 29320, 125
https://tests.stockfishchess.org/tests/view/668a17e3eca84f4d25864e91

closes https://github.com/official-stockfish/Stockfish/pull/5464

bench 1331408
This commit is contained in:
Shawn Xu 2024-07-06 20:07:01 -07:00 • committed by Joost VandeVondele
parent acd0a933ad
commit 4880ed4ad1
1 changed files with 0 additions and 15 deletions
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15
src/search.cpp
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@ -861,8 +861,6 @@ Value Search::Worker::search(
assert(probCutBeta < VALUE_INFINITE && probCutBeta > beta);
MovePicker mp(pos, ttData.move, probCutBeta - ss->staticEval, &thisThread->captureHistory);
Move probcutCapturesSearched[32];
int probcutCaptureCount = 0;
Piece captured;
while ((move = mp.next_move()) != Move::none())
@ -900,25 +898,12 @@ Value Search::Worker::search(
thisThread->captureHistory[movedPiece][move.to_sq()][type_of(captured)]
<< stat_bonus(depth - 2);
for (int i = 0; i < probcutCaptureCount; i++)
{
movedPiece = pos.moved_piece(probcutCapturesSearched[i]);
captured = pos.piece_on(probcutCapturesSearched[i].to_sq());
thisThread->captureHistory[movedPiece][probcutCapturesSearched[i].to_sq()]
[type_of(captured)]
<< -stat_malus(depth - 3);
}
// Save ProbCut data into transposition table
ttWriter.write(posKey, value_to_tt(value, ss->ply), ss->ttPv, BOUND_LOWER,
depth - 3, move, unadjustedStaticEval, tt.generation());
return std::abs(value) < VALUE_TB_WIN_IN_MAX_PLY ? value - (probCutBeta - beta)
: value;
}
if (probcutCaptureCount < 32)
probcutCapturesSearched[probcutCaptureCount++] = move;
}
Eval::NNUE::hint_common_parent_position(pos, networks[numaAccessToken], refreshTable);