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Remove reduction increase on repetition

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Passed non-reg STC:
https://tests.stockfishchess.org/tests/view/65f89ae30ec64f0526c4e0ff
LLR: 2.93 (-2.94,2.94) <-1.75,0.25>
Total: 173568 W: 45005 L: 44936 D: 83627
Ptnml(0-2): 684, 19878, 45628, 19873, 721

Passed non-reg LTC:
https://tests.stockfishchess.org/tests/view/65fa0f370ec64f0526c4f42d
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 21138 W: 5432 L: 5216 D: 10490
Ptnml(0-2): 13, 2107, 6112, 2325, 12

closes https://github.com/official-stockfish/Stockfish/pull/5123

Bench: 2109005
This commit is contained in:
Gahtan Nahdi 2024-03-19 02:45:09 +07:00 • committed by Disservin
parent 1a6c22c511
commit 8e61d70499
1 changed files with 0 additions and 4 deletions
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4
src/search.cpp
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@ -1117,10 +1117,6 @@ moves_loop: // When in check, search starts here
if (PvNode)
r--;
// Increase reduction on repetition (~1 Elo)
if (move == (ss - 4)->currentMove && pos.has_repeated())
r += 2;
// Increase reduction if next ply has a lot of fail high (~5 Elo)
if ((ss + 1)->cutoffCnt > 3)
r++;