Dev Builds » 20251228-1349

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 06:45:12 581958 4004 1711 388 1905 +119.27 ± 4.59 0 43 614 1324 21 +269.58 ± 13.73
ncm-dbt-02 06:45:05 587044 4000 1737 408 1855 +119.99 ± 4.55 1 32 629 1313 25 +270.87 ± 13.53
ncm-dbt-03 06:44:43 586305 4000 1745 369 1886 +124.6 ± 4.54 0 36 578 1360 26 +284.85 ± 14.15
ncm-dbt-04 06:44:51 566943 4000 1755 392 1853 +123.32 ± 4.61 0 33 607 1324 36 +277.62 ± 13.79
ncm-dbt-05 06:46:05 583406 3996 1714 410 1872 +117.68 ± 4.71 0 41 650 1269 38 +259.7 ± 13.32
20000 8662 1967 9371 +120.97 ± 2.06 1 185 3078 6590 146 +272.39 ± 6.12

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
447894 ncm-dbt-01 582945 4 2 0 2 +190.27 ± 27.79 0 0 0 2 0 +1199.83 ± 312.71
447893 ncm-dbt-05 586477 496 211 55 230 +113.11 ± 12.93 0 4 87 154 3 +250.17 ± 36.47
447892 ncm-dbt-02 587155 500 217 58 225 +114.45 ± 12.49 0 4 84 161 1 +258.75 ± 37.2
447891 ncm-dbt-04 567324 500 215 47 238 +121.45 ± 12.95 0 4 78 164 4 +273.0 ± 38.74
447890 ncm-dbt-03 584664 500 217 54 229 +117.55 ± 13.36 0 8 73 167 2 +265.78 ± 40.25
447889 ncm-dbt-01 582778 500 210 48 242 +116.77 ± 13.54 0 8 75 164 3 +261.07 ± 39.69
447888 ncm-dbt-05 582987 500 217 50 233 +120.67 ± 12.6 0 4 77 167 2 +275.45 ± 39.01
447887 ncm-dbt-02 586054 500 229 50 221 +130.14 ± 13.16 0 4 69 171 6 +295.94 ± 41.39
447886 ncm-dbt-04 566888 500 223 51 226 +124.6 ± 13.09 0 4 75 166 5 +280.42 ± 39.57
447885 ncm-dbt-01 579248 500 222 52 226 +123.02 ± 12.93 0 3 79 163 5 +275.45 ± 38.39
447884 ncm-dbt-03 586985 500 220 37 243 +133.34 ± 12.49 0 3 65 178 4 +312.48 ± 42.67
447883 ncm-dbt-05 582068 500 224 68 208 +112.14 ± 13.89 0 6 89 148 7 +238.66 ± 36.16
447882 ncm-dbt-02 587537 500 218 53 229 +119.11 ± 12.8 0 5 77 166 2 +270.57 ± 39.07
447881 ncm-dbt-04 563197 500 212 52 236 +115.22 ± 13.38 0 7 79 161 3 +256.44 ± 38.62
447880 ncm-dbt-03 586054 500 223 40 237 +133.34 ± 11.88 0 2 65 181 2 +318.25 ± 42.59
447879 ncm-dbt-01 584790 500 214 42 244 +124.6 ± 12.53 0 4 72 172 2 +288.06 ± 40.46
447878 ncm-dbt-05 579207 500 212 29 259 +133.34 ± 13.81 0 5 66 170 9 +298.62 ± 42.41
447877 ncm-dbt-02 588047 500 219 43 238 +127.76 ± 12.06 0 2 72 174 2 +298.62 ± 40.29
447876 ncm-dbt-03 586689 500 216 43 241 +125.38 ± 12.7 0 2 78 165 5 +282.94 ± 38.55
447875 ncm-dbt-04 568037 500 223 46 231 +128.55 ± 13.38 0 4 72 167 7 +288.06 ± 40.46
447874 ncm-dbt-01 582402 500 217 55 228 +116.78 ± 13.01 0 8 72 170 0 +268.17 ± 40.54
447873 ncm-dbt-04 567403 500 227 51 222 +127.76 ± 12.65 0 3 72 171 4 +293.29 ± 40.39
447872 ncm-dbt-05 582402 500 211 52 237 +114.45 ± 12.85 0 3 89 154 4 +251.89 ± 35.92
447871 ncm-dbt-02 588217 500 208 45 247 +117.55 ± 13.0 0 2 89 153 6 +256.44 ± 35.8
447870 ncm-dbt-03 584369 500 220 41 239 +130.14 ± 12.78 0 4 67 175 4 +301.33 ± 42.04
447869 ncm-dbt-01 581860 500 211 44 245 +120.67 ± 12.97 0 6 73 169 2 +275.45 ± 40.24
447868 ncm-dbt-04 568156 500 218 46 236 +124.6 ± 12.14 0 2 76 170 2 +288.06 ± 39.11
447867 ncm-dbt-05 584411 500 216 49 235 +120.67 ± 13.5 0 5 79 160 6 +265.78 ± 38.54
447866 ncm-dbt-03 586901 500 221 54 225 +120.67 ± 13.84 0 8 72 165 5 +268.17 ± 40.54
447865 ncm-dbt-01 582903 500 218 53 229 +119.11 ± 12.99 0 4 81 161 4 +265.78 ± 37.95
447864 ncm-dbt-02 587452 500 221 61 218 +115.22 ± 12.48 0 3 86 159 2 +258.75 ± 36.62
447863 ncm-dbt-04 565548 500 214 40 246 +126.17 ± 13.06 0 3 76 165 6 +282.94 ± 39.21
447862 ncm-dbt-05 580116 500 216 55 229 +116.0 ± 13.37 0 5 84 156 5 +254.16 ± 37.27
447861 ncm-dbt-03 586477 500 216 52 232 +118.33 ± 13.0 0 6 76 166 2 +268.17 ± 39.39
447860 ncm-dbt-01 582527 500 206 55 239 +108.3 ± 13.73 0 7 90 148 5 +232.26 ± 35.99
447859 ncm-dbt-02 586223 500 207 49 244 +113.68 ± 13.89 1 8 75 164 2 +256.44 ± 39.69
447858 ncm-dbt-01 578177 500 211 39 250 +124.6 ± 11.94 0 3 72 175 0 +293.29 ± 40.39
447857 ncm-dbt-05 589582 500 207 52 241 +111.37 ± 13.56 0 9 79 160 2 +247.41 ± 38.64
447856 ncm-dbt-04 568991 500 223 59 218 +118.33 ± 13.52 0 6 79 160 5 +261.07 ± 38.58
447855 ncm-dbt-03 588302 500 212 48 240 +118.33 ± 12.44 0 3 82 163 2 +268.17 ± 37.61
447854 ncm-dbt-02 585674 500 218 49 233 +122.24 ± 12.94 0 4 77 165 4 +275.45 ± 39.01

Commit

Commit ID cd3a8373243d145291abe9e546fd0396fc0e73fd
Author FauziAkram
Date 2025-12-28 13:49:19 UTC
Refine reduction logic based on next-ply cutoff count Passed STC: LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 38208 W: 10076 L: 9754 D: 18378 Ptnml(0-2): 139, 4390, 9742, 4676, 157 https://tests.stockfishchess.org/tests/view/6945bb6446f342e1ec211d93 Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 64086 W: 16529 L: 16157 D: 31400 Ptnml(0-2): 34, 6808, 17990, 7174, 37 https://tests.stockfishchess.org/tests/view/69479d303c8768ca45072446 closes https://github.com/official-stockfish/Stockfish/pull/6489 Bench: 2442415
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