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Simplify Triple Margin Formula

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Passed STC:
LLR: 3.01 (-2.94,2.94) <-1.75,0.25>
Total: 517472 W: 133271 L: 133575 D: 250626
Ptnml(0-2): 1628, 61366, 133032, 61102, 1608
https://tests.stockfishchess.org/tests/view/69590175d844c1ce7cc7e9a2

Passed LTC:
LLR: 2.95 (-2.94,2.94) <-1.75,0.25>
Total: 95430 W: 24242 L: 24098 D: 47090
Ptnml(0-2): 42, 10289, 26926, 10399, 59
https://tests.stockfishchess.org/tests/view/695f7f03ca95f52e4b85253c

Passed VVLTC:
LLR: 2.94 (-2.94,2.94) <-1.75,0.25>
Total: 58828 W: 15299 L: 15135 D: 28394
Ptnml(0-2): 4, 5277, 18687, 5443, 3
https://tests.stockfishchess.org/tests/view/6961686c8709a8d27c0383f6

closes https://github.com/official-stockfish/Stockfish/pull/6546

Bench: 2570943
This commit is contained in:
FauziAkram
2026-02-08 15:22:06 +01:00
committed by Disservin
parent 73475b198d
commit f0d0c3ddd2
1 changed files with 1 additions and 1 deletions
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src/search.cpp
+1 -1
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@@ -1144,7 +1144,7 @@ moves_loop: // When in check, search starts here
int doubleMargin = -4 + 199 * PvNode - 201 * !ttCapture - corrValAdj
- 897 * ttMoveHistory / 127649 - (ss->ply > rootDepth) * 42;
int tripleMargin = 73 + 302 * PvNode - 248 * !ttCapture + 90 * ss->ttPv - corrValAdj
- (ss->ply * 2 > rootDepth * 3) * 50;
- (ss->ply > rootDepth) * 48;
extension =
1 + (value < singularBeta - doubleMargin) + (value < singularBeta - tripleMargin);