Dev Builds » 20260919-1043

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 06:44:20 584463 4000 1842 299 1859 +141.34 ± 4.33 0 14 473 1469 44 +337.64 ± 15.63
ncm-dbt-02 06:43:35 590919 4000 1831 273 1896 +142.87 ± 4.32 0 12 465 1476 47 +342.45 ± 15.76
ncm-dbt-03 06:44:30 583815 4000 1826 303 1871 +139.3 ± 4.36 1 19 472 1472 36 +333.32 ± 15.67
ncm-dbt-04 06:43:56 568097 4000 1810 312 1878 +136.77 ± 4.29 0 10 519 1434 37 +323.05 ± 14.87
ncm-dbt-05 06:45:26 602866 4000 1851 258 1891 +146.47 ± 4.37 1 13 433 1498 55 +354.07 ± 16.36
20000 9160 1445 9395 +141.34 ± 1.94 2 68 2362 7349 219 +337.88 ± 6.99

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
485336 ncm-dbt-05 603769 500 224 31 245 +141.44 ± 11.98 0 2 57 187 4 +342.85 ± 45.71
485335 ncm-dbt-01 583908 500 240 39 221 +148.02 ± 11.88 0 1 53 190 6 +363.2 ± 47.43
485334 ncm-dbt-03 583028 500 233 37 230 +143.89 ± 12.71 0 2 58 182 8 +339.63 ± 45.29
485333 ncm-dbt-04 567324 500 235 41 224 +142.25 ± 12.58 0 1 62 179 8 +333.32 ± 43.57
485332 ncm-dbt-02 589882 500 229 36 235 +141.44 ± 12.61 0 1 63 178 8 +330.23 ± 43.2
485331 ncm-dbt-05 601981 500 235 40 225 +143.07 ± 13.54 0 3 60 176 11 +327.18 ± 44.54
485330 ncm-dbt-03 583405 500 229 31 240 +145.54 ± 12.43 1 1 52 191 5 +359.68 ± 48.01
485329 ncm-dbt-01 586393 500 237 44 219 +141.44 ± 12.2 0 1 61 182 6 +336.46 ± 43.96
485328 ncm-dbt-04 565508 500 229 40 231 +138.18 ± 11.91 0 1 63 182 4 +330.23 ± 43.2
485327 ncm-dbt-02 590224 500 230 30 240 +147.19 ± 11.92 0 1 54 189 6 +359.68 ± 46.95
485326 ncm-dbt-05 608833 500 240 28 232 +157.23 ± 12.24 0 1 46 193 10 +389.56 ± 51.18
485325 ncm-dbt-03 582527 500 224 41 235 +133.34 ± 11.67 0 2 64 183 1 +321.19 ± 42.95
485324 ncm-dbt-04 568593 500 223 39 238 +134.15 ± 12.27 0 2 66 178 4 +315.35 ± 42.24
485323 ncm-dbt-01 581902 500 227 35 238 +140.62 ± 11.59 0 2 56 190 2 +346.12 ± 46.15
485322 ncm-dbt-02 594367 500 227 42 231 +134.95 ± 12.04 0 0 70 175 5 +315.34 ± 40.62
485321 ncm-dbt-05 599362 500 229 36 235 +141.44 ± 12.4 1 0 59 185 5 +342.85 ± 44.76
485320 ncm-dbt-03 583405 500 220 38 242 +132.54 ± 12.12 0 3 64 181 2 +315.35 ± 43.03
485319 ncm-dbt-04 564958 500 218 42 240 +127.76 ± 12.26 0 1 76 169 4 +293.29 ± 38.98
485318 ncm-dbt-01 583782 500 229 36 235 +141.44 ± 12.81 0 2 61 179 8 +330.23 ± 44.08
485317 ncm-dbt-02 590696 500 232 32 236 +147.19 ± 11.92 0 2 51 192 5 +363.2 ± 48.51
485316 ncm-dbt-05 604218 500 233 26 241 +153.02 ± 12.91 0 3 47 190 10 +370.41 ± 50.67
485315 ncm-dbt-03 584201 500 228 36 236 +140.62 ± 11.81 0 2 57 188 3 +342.85 ± 45.71
485314 ncm-dbt-04 567284 500 229 27 244 +148.84 ± 11.61 0 0 54 190 6 +366.77 ± 46.78
485313 ncm-dbt-01 582736 500 224 33 243 +139.81 ± 12.47 0 2 61 181 6 +330.23 ± 44.08
485312 ncm-dbt-02 590739 500 238 30 232 +153.86 ± 12.22 0 3 43 197 7 +385.59 ± 53.09
485311 ncm-dbt-03 585717 500 226 50 224 +127.76 ± 13.02 0 5 68 173 4 +293.29 ± 41.75
485310 ncm-dbt-05 601268 500 228 34 238 +142.25 ± 11.73 0 0 61 184 5 +342.85 ± 43.79
485309 ncm-dbt-04 568951 500 230 39 231 +139.81 ± 11.84 0 1 61 184 4 +336.46 ± 43.96
485308 ncm-dbt-02 591082 500 225 26 249 +146.36 ± 12.61 0 2 55 185 8 +349.43 ± 46.59
485307 ncm-dbt-01 583279 500 232 40 228 +140.62 ± 11.81 0 0 63 182 5 +336.45 ± 43.03
485306 ncm-dbt-03 582861 500 233 34 233 +146.36 ± 12.61 0 4 49 191 6 +356.21 ± 49.54
485305 ncm-dbt-05 598965 500 232 31 237 +148.02 ± 11.65 0 2 49 195 4 +370.41 ± 49.56
485304 ncm-dbt-01 583572 500 226 38 236 +137.37 ± 13.15 0 5 58 181 6 +321.19 ± 45.36
485303 ncm-dbt-04 566888 500 215 37 248 +129.35 ± 12.41 0 3 69 175 3 +301.33 ± 41.33
485302 ncm-dbt-02 589668 500 224 39 237 +134.95 ± 12.04 0 2 64 181 3 +321.19 ± 42.95
485301 ncm-dbt-03 585379 500 233 36 231 +144.71 ± 12.05 0 0 60 183 7 +346.11 ± 44.19
485300 ncm-dbt-01 590138 500 227 34 239 +141.44 ± 11.98 0 1 60 184 5 +339.63 ± 44.35
485299 ncm-dbt-05 604532 500 230 32 238 +145.54 ± 12.22 0 2 54 188 6 +352.8 ± 47.05
485298 ncm-dbt-02 590696 500 226 38 236 +137.37 ± 12.15 0 1 65 179 5 +324.17 ± 42.47
485297 ncm-dbt-04 575272 500 231 47 222 +134.15 ± 12.06 0 1 68 177 4 +315.35 ± 41.44

Commit

Commit ID 17a6c8f1eb0da45c2ca405321919519bf4e211ba
Author disservin
Date 2026-09-19 10:43:30 UTC
CI: Update Compiler Images (#7175) Take images from https://github.com/official-stockfish/compiler-images - adds testing for clang-22, clang-23 and gcc-16 closes https://github.com/official-stockfish/Stockfish/pull/7175 No functional change
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