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Remove non-functional term in isShuffling

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closes https://github.com/official-stockfish/Stockfish/pull/6462

No functional change
This commit is contained in:
Daniel Monroe
2025-12-21 15:43:32 +01:00
committed by Disservin
parent a98c3f6878
commit 8449e5eb9d
1 changed files with 3 additions and 4 deletions
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src/search.cpp
+3 -4
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@@ -141,9 +141,8 @@ void update_all_stats(const Position& pos,
Move TTMove,
int moveCount);
bool isShuffling(Move move, Stack* const ss, const Position& pos) {
if (type_of(pos.moved_piece(move)) == PAWN || pos.capture_stage(move)
|| pos.rule50_count() < 10)
bool is_shuffling(Move move, Stack* const ss, const Position& pos) {
if (pos.capture_stage(move) || pos.rule50_count() < 10)
return false;
if (pos.state()->pliesFromNull <= 6 || ss->ply < 20)
return false;
@@ -1119,7 +1118,7 @@ moves_loop: // When in check, search starts here
// and lower extension margins scale well.
if (!rootNode && move == ttData.move && !excludedMove && depth >= 6 + ss->ttPv
&& is_valid(ttData.value) && !is_decisive(ttData.value) && (ttData.bound & BOUND_LOWER)
&& ttData.depth >= depth - 3 && !isShuffling(move, ss, pos))
&& ttData.depth >= depth - 3 && !is_shuffling(move, ss, pos))
{
Value singularBeta = ttData.value - (53 + 75 * (ss->ttPv && !PvNode)) * depth / 60;
Depth singularDepth = newDepth / 2;