Dev Builds » 20260627-1330

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 06:45:07 583300 4008 1769 348 1891 +128.77 ± 4.41 0 21 571 1382 30 +297.35 ± 14.2
ncm-dbt-02 06:45:46 591261 4002 1759 334 1909 +129.38 ± 4.43 0 24 557 1391 29 +299.74 ± 14.4
ncm-dbt-03 06:45:54 584703 4000 1768 299 1933 +133.85 ± 4.4 0 25 511 1434 30 +314.99 ± 15.06
ncm-dbt-04 06:45:46 567347 3998 1766 349 1883 +128.72 ± 4.5 0 29 555 1384 31 +296.84 ± 14.44
ncm-dbt-05 06:46:12 583546 3992 1752 322 1918 +130.23 ± 4.42 0 23 549 1395 29 +302.63 ± 14.5
20000 8814 1652 9534 +130.19 ± 1.98 0 122 2743 6986 149 +302.22 ± 6.48

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
476088 ncm-dbt-02 593109 2 1 0 1 +189.7 ± 55.98 0 0 0 1 0 +1129.65 ± 376.02
476087 ncm-dbt-01 581902 8 5 1 2 +190.56 ± 189.63 0 0 1 2 1 +337.69 ± 541.44
476086 ncm-dbt-05 584453 492 222 42 228 +133.28 ± 12.62 0 2 67 172 5 +309.21 ± 41.88
476085 ncm-dbt-04 565154 498 218 38 242 +131.52 ± 12.58 0 4 64 178 3 +308.83 ± 43.08
476084 ncm-dbt-03 583866 500 220 48 232 +124.6 ± 13.09 0 4 75 166 5 +280.42 ± 39.57
476083 ncm-dbt-01 581735 500 209 49 242 +115.22 ± 12.85 0 5 82 161 2 +258.75 ± 37.76
476082 ncm-dbt-02 591426 500 214 37 249 +128.55 ± 12.63 0 2 74 169 5 +293.29 ± 39.69
476081 ncm-dbt-05 582569 500 219 34 247 +134.95 ± 12.44 0 4 60 183 3 +321.19 ± 44.57
476080 ncm-dbt-03 583531 500 226 33 241 +141.44 ± 11.32 0 1 57 190 2 +349.43 ± 45.6
476079 ncm-dbt-04 567403 500 223 48 229 +126.97 ± 12.85 0 3 74 168 5 +288.06 ± 39.79
476078 ncm-dbt-01 583992 500 224 34 242 +138.99 ± 13.1 0 3 62 177 8 +321.19 ± 43.77
476077 ncm-dbt-02 591383 500 220 50 230 +123.02 ± 13.29 0 6 72 168 4 +277.93 ± 40.53
476076 ncm-dbt-03 585843 500 225 42 233 +133.34 ± 12.29 0 4 61 183 2 +318.25 ± 44.18
476075 ncm-dbt-05 579166 500 217 49 234 +121.45 ± 12.77 0 4 77 166 3 +275.45 ± 39.01
476074 ncm-dbt-04 565981 500 223 49 228 +126.17 ± 12.49 0 5 67 177 1 +295.94 ± 42.08
476073 ncm-dbt-02 587155 500 220 42 238 +129.35 ± 12.41 0 3 69 175 3 +301.33 ± 41.33
476072 ncm-dbt-01 583363 500 227 49 224 +129.35 ± 12.61 0 4 67 176 3 +301.33 ± 42.04
476071 ncm-dbt-03 583866 500 229 37 234 +140.62 ± 12.44 0 3 57 185 5 +336.46 ± 45.77
476070 ncm-dbt-05 586646 500 220 34 246 +135.76 ± 12.21 0 1 67 177 5 +318.25 ± 41.77
476069 ncm-dbt-04 568514 500 217 42 241 +126.97 ± 12.47 0 4 69 175 2 +295.94 ± 41.39
476068 ncm-dbt-02 592418 500 214 39 247 +126.97 ± 12.28 0 2 74 171 3 +293.29 ± 39.69
476067 ncm-dbt-01 583908 500 225 35 240 +138.99 ± 12.09 0 3 57 187 3 +336.46 ± 45.77
476066 ncm-dbt-05 583154 500 213 41 246 +124.6 ± 12.53 0 3 75 169 3 +285.49 ± 39.5
476065 ncm-dbt-04 568713 500 224 42 234 +132.54 ± 13.28 0 6 61 178 5 +306.84 ± 44.17
476064 ncm-dbt-03 583363 500 215 46 239 +122.24 ± 12.57 0 4 75 169 2 +280.42 ± 39.57
476063 ncm-dbt-01 583237 500 215 46 239 +122.24 ± 12.38 0 3 77 168 2 +280.42 ± 38.93
476062 ncm-dbt-02 590911 500 218 44 238 +126.17 ± 12.1 0 3 71 175 1 +295.94 ± 40.69
476061 ncm-dbt-05 585717 500 221 44 235 +128.55 ± 12.63 0 3 71 172 4 +295.94 ± 40.69
476060 ncm-dbt-04 565626 500 220 46 234 +126.17 ± 12.1 0 2 74 172 2 +293.29 ± 39.69
476059 ncm-dbt-03 587197 500 210 27 263 +133.34 ± 12.69 0 3 66 176 5 +309.64 ± 42.33
476058 ncm-dbt-01 582903 500 224 45 231 +130.14 ± 12.39 0 2 71 173 4 +301.33 ± 40.6
476057 ncm-dbt-02 588430 500 227 49 224 +129.35 ± 13.17 0 4 70 170 6 +293.29 ± 41.07
476056 ncm-dbt-05 580655 500 213 35 252 +129.35 ± 12.61 0 2 73 170 5 +295.94 ± 39.99
476055 ncm-dbt-04 567442 500 222 40 238 +132.54 ± 12.91 0 2 71 170 7 +301.33 ± 40.6
476054 ncm-dbt-01 585632 500 216 44 240 +124.6 ± 12.71 0 1 82 161 6 +277.93 ± 37.36
476053 ncm-dbt-03 585717 500 220 31 249 +138.18 ± 12.33 0 2 62 181 5 +327.18 ± 43.69
476052 ncm-dbt-02 592677 500 217 44 239 +125.38 ± 12.32 0 2 76 169 3 +288.06 ± 39.11
476051 ncm-dbt-01 583028 500 224 45 231 +130.14 ± 11.36 0 0 72 177 1 +309.64 ± 40.0
476050 ncm-dbt-04 569949 500 219 44 237 +126.97 ± 13.04 0 3 75 166 6 +285.49 ± 39.5
476049 ncm-dbt-03 584243 500 223 35 242 +137.37 ± 12.56 0 4 58 184 4 +327.18 ± 45.37
476048 ncm-dbt-05 586012 500 227 43 230 +134.15 ± 12.06 0 4 59 186 1 +324.17 ± 44.97
476047 ncm-dbt-02 593846 500 228 29 243 +146.36 ± 11.74 0 2 51 193 4 +363.2 ± 48.51

Commit

Commit ID feb932533d909172d241b5f7619a9a0f48ee7d77
Author David
Date 2026-06-27 13:30:23 UTC
Update bug report template closes https://github.com/official-stockfish/Stockfish/pull/6926 No functional change
Copyright 2011–2026 Next Chess Move LLC