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Simplify key after

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Passed Non-regression STC:
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 534016 W: 139438 L: 139771 D: 254807
Ptnml(0-2): 2098, 63469, 136136, 63278, 2027
https://tests.stockfishchess.org/tests/view/688ac64d502b34dd5e7110a4

Passed Non-regression LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 43980 W: 11346 L: 11149 D: 21485
Ptnml(0-2): 31, 4689, 12353, 4886, 31
https://tests.stockfishchess.org/tests/view/688ea8a47d68fe4f7f130eb3

closes https://github.com/official-stockfish/Stockfish/pull/6207

Bench: 2884232
This commit is contained in:
Shawn Xu
2025-08-04 15:07:37 +02:00
committed by Joost VandeVondele
parent 5d1505d8c7
commit 14a2e50a3d
1 changed files with 2 additions and 2 deletions
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src/search.cpp
+2 -2
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@@ -702,10 +702,10 @@ Value Search::Worker::search(
if (depth >= 8 && ttData.move && pos.pseudo_legal(ttData.move) && pos.legal(ttData.move)
&& !is_decisive(ttData.value))
{
do_move(pos, ttData.move, st, nullptr);
pos.do_move(ttData.move, st);
Key nextPosKey = pos.key();
auto [ttHitNext, ttDataNext, ttWriterNext] = tt.probe(nextPosKey);
undo_move(pos, ttData.move);
pos.undo_move(ttData.move);
// Check that the ttValue after the tt move would also trigger a cutoff
if (!is_valid(ttDataNext.value))