jirayu_sri/stockfish
1
0
Fork 0
mirror of https://github.com/official-stockfish/Stockfish.git synced 2026-07-22 12:47:08 +00:00
Code Issues Packages Projects Releases Wiki Activity

Simplify PCM TTMove Bonus

Browse Source 
Passed Non-regression STC:
LLR: 2.97 (-2.94,2.94) <-1.75,0.25>
Total: 114048 W: 29597 L: 29459 D: 54992
Ptnml(0-2): 315, 13619, 29045, 13703, 342
https://tests.stockfishchess.org/tests/view/681e83533629b02d74b17701

Passed Non-regression LTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 61014 W: 15582 L: 15405 D: 30027
Ptnml(0-2): 25, 6485, 17307, 6668, 22
https://tests.stockfishchess.org/tests/view/68226b523629b02d74b17b89

closes https://github.com/official-stockfish/Stockfish/pull/6061

bench 2016566
This commit is contained in:
Shawn Xu
2025-05-19 07:13:39 +02:00
committed by Joost VandeVondele
parent 07f6edf934
commit 6b7e05f0c5
2 changed files with 6 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/search.cpp
+6 -8
View File
@@ -921,7 +921,6 @@ Value Search::Worker::search(
do_move(pos, move, st);
ss->currentMove = move;
ss->isTTMove = (move == ttData.move);
ss->continuationHistory =
&this->continuationHistory[ss->inCheck][true][movedPiece][move.to_sq()];
ss->continuationCorrectionHistory =
@@ -1172,7 +1171,6 @@ moves_loop: // When in check, search starts here
// Update the current move (this must be done after singular extension search)
ss->currentMove = move;
ss->isTTMove = (move == ttData.move);
ss->continuationHistory =
&thisThread->continuationHistory[ss->inCheck][capture][movedPiece][move.to_sq()];
ss->continuationCorrectionHistory =
@@ -1203,7 +1201,7 @@ moves_loop: // When in check, search starts here
r += 1036 + allNode * 848;
// For first picked move (ttMove) reduce reduction
else if (ss->isTTMove)
else if (move == ttData.move)
r -= 2006;
if (capture)
@@ -1285,7 +1283,7 @@ moves_loop: // When in check, search starts here
(ss + 1)->pv[0] = Move::none();
// Extend move from transposition table if we are about to dive into qsearch.
if (ss->isTTMove && thisThread->rootDepth > 8)
if (move == ttData.move && thisThread->rootDepth > 8)
newDepth = std::max(newDepth, 1);
value = -search<PV>(pos, ss + 1, -beta, -alpha, newDepth, false);
@@ -1423,7 +1421,7 @@ moves_loop: // When in check, search starts here
ttData.move, moveCount);
if (!PvNode)
{
int bonus = ss->isTTMove ? 800 : -879;
int bonus = bestMove == ttData.move ? 800 : -879;
ttMoveHistory << bonus;
}
}
@@ -1431,11 +1429,11 @@ moves_loop: // When in check, search starts here
// Bonus for prior quiet countermove that caused the fail low
else if (!priorCapture && prevSq != SQ_NONE)
{
int bonusScale = std::min(-(ss - 1)->statScore / 113, 293);
bonusScale += std::min(73 * depth - 347, 184);
int bonusScale = -324;
bonusScale += std::min(-(ss - 1)->statScore / 103, 323);
bonusScale += std::min(73 * depth, 531);
bonusScale += 33 * !allNode;
bonusScale += 174 * ((ss - 1)->moveCount > 8);
bonusScale += 86 * (ss - 1)->isTTMove;
bonusScale += 90 * (ss->cutoffCnt <= 3);
bonusScale += 144 * (!ss->inCheck && bestValue <= ss->staticEval - 104);
bonusScale += 128 * (!(ss - 1)->inCheck && bestValue <= -(ss - 1)->staticEval - 82);
src/search.h
-1
View File
@@ -75,7 +75,6 @@ struct Stack {
bool ttHit;
int cutoffCnt;
int reduction;
bool isTTMove;
bool isPvNode;
};