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Parameter tweak from Black Marlin chess engine. Choose a significantly lower value that triggers in 95% of cases, compared to the usual 84% in standard benchmark runs. Since the introduction by 33a858e this constant has only decreased in value over time. 2-16-17-18-21-22-25-26-52-71-75-93-140 Failed STC really fast: https://tests.stockfishchess.org/tests/view/65b11d05c865510db026df7b LLR: -2.94 (-2.94,2.94) <0.00,2.00> Total: 13216 W: 3242 L: 3485 D: 6489 Ptnml(0-2): 50, 1682, 3371, 1471, 34 Was reasonable at LTC: https://tests.stockfishchess.org/tests/view/65b13e20c865510db026e210 Elo: 1.18 ± 1.5 (95%) LOS: 94.3% Total: 50000 W: 12517 L: 12347 D: 25136 Ptnml(0-2): 31, 5598, 13579, 5754, 38 nElo: 2.45 ± 3.0 (95%) PairsRatio: 1.03 Passed VLTC with STC bounds: https://tests.stockfishchess.org/tests/view/65b18870c865510db026e769 LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 30456 W: 7726 L: 7448 D: 15282 Ptnml(0-2): 6, 3111, 8717, 3387, 7 Passed VVLTC with LTC bounds: https://tests.stockfishchess.org/tests/view/65b20b95c865510db026eef0 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 36134 W: 9158 L: 8859 D: 18117 Ptnml(0-2): 3, 3455, 10850, 3758, 1 closes #5013 Bench: 1503692
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Big big nerf at STC. SF will display big regression on many engine lists because of this one.