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Reduce on ttcaptures if not capture

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Tweak ttcapture reduction.
Reduce on ttcaptures only if the current move is a capture

Passed STC:
LLR: 2.93 (-2.94,2.94) <0.00,2.00>
Total: 94912 W: 24896 L: 24492 D: 45524
Ptnml(0-2): 301, 11197, 24087, 11539, 332
https://tests.stockfishchess.org/tests/view/66cd2264bf8c9d8780fdab34

Passed LTC:
LLR: 2.94 (-2.94,2.94) <0.50,2.50>
Total: 60738 W: 15465 L: 15096 D: 30177
Ptnml(0-2): 42, 6573, 16775, 6932, 47
https://tests.stockfishchess.org/tests/view/66cf356d9de3e7f9b33d0fde

closes https://github.com/official-stockfish/Stockfish/pull/5562

Bench: 1268700
This commit is contained in:
Daniel Monroe 2024-09-01 20:56:09 -04:00 • committed by Disservin
parent ddc9f48bc3
commit e74452ae44
1 changed files with 2 additions and 2 deletions
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4
src/search.cpp
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@ -1140,8 +1140,8 @@ moves_loop: // When in check, search starts here
if (cutNode)
r += 2 - (ttData.depth >= depth && ss->ttPv);
// Increase reduction if ttMove is a capture (~3 Elo)
if (ttCapture)
// Increase reduction if ttMove is a capture but the current move is not a capture (~3 Elo)
if (ttCapture && !capture)
r++;
// Increase reduction if next ply has a lot of fail high (~5 Elo)