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Merge commit '703f17975bd9c29172a27f795ca6b5a7d0a32b25' into cluster

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Steinar H. Gunderson
2025-12-25 16:55:54 +01:00
parent 0043886170 703f17975b
commit a449238954
5 changed files with 19 additions and 71 deletions
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src/search.cpp
+2 -8
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@@ -1527,12 +1527,6 @@ Value Search::Worker::qsearch(Position& pos, Stack* ss, Value alpha, Value beta,
assert(0 <= ss->ply && ss->ply < MAX_PLY);
// Note that unlike regular search, which stores the literal depth into the
// transposition table, from qsearch we only store the current movegen stage
// as "depth". If in check, we search all evasions and thus store DEPTH_QS_CHECKS.
// Evasions may be quiet, and _CHECKS includes quiets.
Depth qsTtDepth = ss->inCheck || depth >= DEPTH_QS_CHECKS ? DEPTH_QS_CHECKS : DEPTH_QS_NORMAL;
// Step 3. Transposition table lookup
posKey = pos.key();
auto [ttHit, ttData, ttWriter] = tt.probe(posKey);
@@ -1543,7 +1537,7 @@ Value Search::Worker::qsearch(Position& pos, Stack* ss, Value alpha, Value beta,
pvHit = ttHit && ttData.is_pv;
// At non-PV nodes we check for an early TT cutoff
if (!PvNode && ttData.depth >= qsTtDepth
if (!PvNode && ttData.depth >= DEPTH_QS
&& ttData.value != VALUE_NONE // Can happen when !ttHit or when access race in probe()
&& (ttData.bound & (ttData.value >= beta ? BOUND_LOWER : BOUND_UPPER)))
return ttData.value;
@@ -1728,7 +1722,7 @@ Value Search::Worker::qsearch(Position& pos, Stack* ss, Value alpha, Value beta,
// Save gathered info in transposition table. The static evaluation
// is saved as it was before adjustment by correction history.
Distributed::save(tt, threads, thisThread, ttWriter, posKey, value_to_tt(bestValue, ss->ply),
pvHit, bestValue >= beta ? BOUND_LOWER : BOUND_UPPER, qsTtDepth, bestMove,
pvHit, bestValue >= beta ? BOUND_LOWER : BOUND_UPPER, DEPTH_QS, bestMove,
unadjustedStaticEval, tt.generation());
assert(bestValue > -VALUE_INFINITE && bestValue < VALUE_INFINITE);