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Simplify in-check condition for Probcut-in-check

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dont let your memes be dreams !?

Passed Non-regression STC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 512000 W: 132193 L: 132497 D: 247310
Ptnml(0-2): 1600, 61170, 130704, 60986, 1540
https://tests.stockfishchess.org/tests/view/66838911c4f539faa03268a2

Passed Non-regression LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 380268 W: 95894 L: 96042 D: 188332
Ptnml(0-2): 193, 42861, 104180, 42701, 199
https://tests.stockfishchess.org/tests/view/6688d0550c9d7c1ab33ed5a8

closes https://github.com/official-stockfish/Stockfish/pull/5443

Bench: 1130282
This commit is contained in:
Shawn Xu
2024-07-01 21:57:53 -07:00
committed by Joost VandeVondele
parent b1f522930d
commit b79ac764ff
1 changed files with 2 additions and 3 deletions
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src/search.cpp
+2 -3
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@@ -927,10 +927,9 @@ Value Search::Worker::search(
moves_loop: // When in check, search starts here
// Step 12. A small Probcut idea, when we are in check (~4 Elo)
// Step 12. A small Probcut idea (~4 Elo)
probCutBeta = beta + 390;
if (ss->inCheck && (ttData.bound & BOUND_LOWER) && ttData.depth >= depth - 4
&& ttData.value >= probCutBeta && std::abs(ttData.value) < VALUE_TB_WIN_IN_MAX_PLY
if ((ttData.bound & BOUND_LOWER) && ttData.depth >= depth - 4 && ttData.value >= probCutBeta
&& std::abs(beta) < VALUE_TB_WIN_IN_MAX_PLY)
return probCutBeta;