Dev Builds » 20240121-1142

Use this dev build

NCM plays each Stockfish dev build 20,000 times against Stockfish 15. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.

Summary

Host Duration Avg Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo
ncm-dbt-01 06:55:44 584628 4000 1433 624 1943 +71.25 ± 4.95 0 136 931 921 12 +146.57 ± 11.1
ncm-dbt-02 06:55:13 586028 4000 1402 642 1956 +66.82 ± 5.09 2 164 916 908 10 +137.37 ± 11.23
ncm-dbt-03 06:56:48 586821 4000 1417 660 1923 +66.55 ± 5.11 2 167 913 908 10 +136.77 ± 11.25
ncm-dbt-04 06:54:38 571219 4000 1446 659 1895 +69.26 ± 5.11 3 156 904 925 12 +142.66 ± 11.31
ncm-dbt-05 06:56:33 584642 4000 1460 626 1914 +73.52 ± 5.01 3 131 908 945 13 +152.18 ± 11.26
20000 7158 3211 9631 +69.48 ± 2.26 10 754 4572 4607 57 +143.07 ± 5.02

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
401333 ncm-dbt-01 584369 500 169 64 267 +74.06 ± 13.74 0 16 113 121 0 +155.54 ± 32.01
401332 ncm-dbt-05 584916 500 183 85 232 +68.99 ± 14.14 0 19 115 115 1 +142.26 ± 31.77
401331 ncm-dbt-03 584243 500 175 81 244 +66.1 ± 14.86 0 25 107 117 1 +135.76 ± 33.06
401330 ncm-dbt-04 570749 500 183 82 235 +71.16 ± 14.64 0 21 109 118 2 +145.54 ± 32.74
401329 ncm-dbt-02 582611 500 180 81 239 +69.71 ± 14.17 0 17 120 110 3 +140.62 ± 30.95
401328 ncm-dbt-05 584706 500 175 67 258 +76.25 ± 14.67 2 15 107 125 1 +162.35 ± 33.02
401327 ncm-dbt-01 585928 500 181 81 238 +70.43 ± 14.48 0 18 118 110 4 +140.62 ± 31.28
401326 ncm-dbt-04 572719 500 169 81 250 +61.79 ± 14.55 1 22 115 112 0 +129.35 ± 31.83
401325 ncm-dbt-02 586308 500 180 75 245 +74.06 ± 14.74 1 19 105 124 1 +155.54 ± 33.38
401324 ncm-dbt-03 584411 500 162 75 263 +61.07 ± 14.1 0 20 125 103 2 +123.02 ± 30.3
401323 ncm-dbt-01 582819 500 184 75 241 +76.97 ± 13.38 0 12 118 119 1 +160.64 ± 31.07
401322 ncm-dbt-05 586816 500 183 78 239 +74.06 ± 14.03 0 16 115 117 2 +152.18 ± 31.7
401321 ncm-dbt-02 586520 500 173 84 243 +62.51 ± 15.37 0 29 105 114 2 +126.18 ± 33.33
401320 ncm-dbt-04 572316 500 181 88 231 +65.38 ± 14.14 0 20 118 111 1 +134.15 ± 31.33
401319 ncm-dbt-03 588515 500 180 83 237 +68.27 ± 14.4 0 20 115 113 2 +138.99 ± 31.79
401318 ncm-dbt-01 584958 500 185 81 234 +73.33 ± 13.86 0 14 121 112 3 +148.85 ± 30.69
401317 ncm-dbt-05 581527 500 172 72 256 +70.43 ± 13.32 0 12 128 108 2 +143.89 ± 29.53
401316 ncm-dbt-04 569949 500 180 85 235 +66.82 ± 14.48 1 18 118 111 2 +137.37 ± 31.31
401315 ncm-dbt-03 588813 500 182 87 231 +66.82 ± 14.34 0 20 117 111 2 +135.76 ± 31.48
401314 ncm-dbt-02 585801 500 156 76 268 +56.07 ± 14.29 0 24 123 102 1 +113.68 ± 30.67
401313 ncm-dbt-01 584916 500 180 74 246 +74.79 ± 14.06 0 18 108 124 0 +157.24 ± 32.87
401312 ncm-dbt-05 586604 500 188 76 236 +79.17 ± 14.34 0 16 109 122 3 +162.35 ± 32.67
401311 ncm-dbt-04 572276 500 178 74 248 +73.34 ± 14.58 1 18 108 122 1 +153.86 ± 32.88
401310 ncm-dbt-02 589368 500 182 75 243 +75.52 ± 14.37 0 20 103 127 0 +158.93 ± 33.71
401309 ncm-dbt-03 587494 500 174 82 244 +64.66 ± 14.12 1 17 122 109 1 +134.15 ± 30.68
401308 ncm-dbt-04 568156 500 187 84 229 +72.61 ± 15.1 0 24 101 123 2 +148.85 ± 34.02
401307 ncm-dbt-01 585295 500 172 86 242 +60.36 ± 14.35 0 24 116 110 0 +124.6 ± 31.69
401306 ncm-dbt-05 583489 500 185 81 234 +73.33 ± 14.58 0 20 108 120 2 +150.51 ± 32.89
401305 ncm-dbt-02 586858 500 169 85 246 +58.93 ± 14.42 0 23 122 103 2 +118.33 ± 30.8
401304 ncm-dbt-03 584706 500 179 81 240 +68.99 ± 15.11 1 23 104 121 1 +143.89 ± 33.53
401303 ncm-dbt-04 572477 500 188 80 232 +76.25 ± 13.96 0 15 114 119 2 +157.24 ± 31.83
401302 ncm-dbt-01 583279 500 172 77 251 +66.82 ± 14.34 0 21 114 114 1 +137.37 ± 31.96
401301 ncm-dbt-05 585506 500 188 89 223 +69.71 ± 14.59 1 19 111 118 1 +145.54 ± 32.41
401300 ncm-dbt-02 585169 500 180 80 240 +70.44 ± 14.2 1 17 113 119 0 +148.85 ± 32.06
401299 ncm-dbt-03 588941 500 185 82 233 +72.61 ± 13.84 0 17 113 120 0 +152.18 ± 32.04
401298 ncm-dbt-01 585464 500 190 86 224 +73.33 ± 13.72 0 13 123 111 3 +148.85 ± 30.34
401297 ncm-dbt-04 571110 500 180 85 235 +66.82 ± 14.06 0 18 121 109 2 +135.76 ± 30.83
401296 ncm-dbt-02 585590 500 182 86 232 +67.54 ± 13.51 0 15 125 109 1 +138.99 ± 30.12
401295 ncm-dbt-05 583572 500 186 78 236 +76.25 ± 13.66 0 14 115 120 1 +158.93 ± 31.63
401294 ncm-dbt-03 587452 500 180 89 231 +63.94 ± 14.78 0 25 110 114 1 +130.94 ± 32.59

Commit

Commit ID e860f620aa3eb42f8a6be78c030c75855d0c9ff0
Author rn5f107s2
Date 2024-01-21 11:42:07 UTC
Reduce futility_margin further when improving The idea of this is to unroll the futility_margin calculation to allow for the improving flag to have a greater effect on the futility margin. The current factor is 1.5 instead of the previous 1 resulting in a deduction of an extra margin/2 from futilit_margin if improving. The chosen value was not tuned, meaning that there is room for tweaking it. This patch is partially inspired by @Vizvezdenec, who, although quite different in execution, tested another idea where the futility_margin is lowered further when improving [1]. [1]: (first take) https://tests.stockfishchess.org/tests/view/65a56b1879aa8af82b97164b Passed STC: https://tests.stockfishchess.org/tests/live_elo/65a8bfc179aa8af82b974e3c LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 161152 W: 41321 L: 40816 D: 79015 Ptnml(0-2): 559, 19030, 40921, 19479, 587 Passed rebased LTC: https://tests.stockfishchess.org/tests/live_elo/65a8b9ef79aa8af82b974dc0 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 96024 W: 24172 L: 23728 D: 48124 Ptnml(0-2): 56, 10598, 26275, 11012, 71 closes https://github.com/official-stockfish/Stockfish/pull/5000 Bench: 1281703
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