Dev Builds » 20260419-1151

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 06:41:16 583398 4000 1758 355 1887 +127.26 ± 4.59 0 34 565 1365 36 +290.34 ± 14.32
ncm-dbt-02 06:40:18 586155 3992 1728 361 1903 +123.98 ± 4.58 2 30 593 1341 30 +282.21 ± 13.95
ncm-dbt-03 06:42:05 584746 4016 1769 349 1898 +128.39 ± 4.5 0 30 560 1386 32 +295.43 ± 14.37
ncm-dbt-04 06:39:34 568627 3992 1738 364 1890 +124.67 ± 4.56 0 27 605 1327 37 +281.58 ± 13.79
ncm-dbt-05 06:41:11 582711 4000 1748 341 1911 +127.66 ± 4.44 0 22 580 1367 31 +293.29 ± 14.08
20000 8741 1770 9489 +126.39 ± 2.03 2 143 2903 6786 166 +288.52 ± 6.3

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
464872 ncm-dbt-03 584411 16 7 2 7 +112.26 ± 65.75 0 0 3 5 0 +254.61 ± 287.37
464871 ncm-dbt-02 586393 492 215 39 238 +130.03 ± 12.71 0 3 68 171 4 +300.78 ± 41.64
464870 ncm-dbt-04 568355 492 216 43 233 +127.61 ± 12.58 0 2 73 167 4 +292.62 ± 39.96
464869 ncm-dbt-05 583866 500 225 37 238 +137.37 ± 11.73 0 1 63 183 3 +330.23 ± 43.2
464868 ncm-dbt-01 584243 500 216 41 243 +126.97 ± 12.28 0 3 71 174 2 +295.94 ± 40.69
464867 ncm-dbt-03 585759 500 224 37 239 +136.56 ± 12.79 0 3 63 178 6 +318.25 ± 43.39
464866 ncm-dbt-02 586562 500 219 37 244 +132.54 ± 12.32 0 3 65 179 3 +312.48 ± 42.67
464865 ncm-dbt-04 568912 500 217 39 244 +129.35 ± 12.01 0 1 73 173 3 +301.33 ± 39.86
464864 ncm-dbt-01 583405 500 219 50 231 +122.24 ± 12.38 0 3 77 168 2 +280.42 ± 38.93
464863 ncm-dbt-05 582402 500 221 40 239 +131.74 ± 12.14 0 1 71 174 4 +306.84 ± 40.47
464862 ncm-dbt-03 584832 500 220 41 239 +130.14 ± 12.59 0 4 66 177 3 +304.07 ± 42.38
464861 ncm-dbt-02 585590 500 213 49 238 +118.33 ± 13.17 0 5 80 161 4 +263.42 ± 38.27
464860 ncm-dbt-04 570268 500 230 43 227 +136.56 ± 12.39 0 2 64 179 5 +321.19 ± 42.95
464859 ncm-dbt-01 583992 500 231 44 225 +136.56 ± 12.79 0 2 66 175 7 +315.35 ± 42.24
464858 ncm-dbt-05 585169 500 219 44 237 +126.97 ± 12.85 0 4 71 171 4 +290.66 ± 40.76
464857 ncm-dbt-03 581943 500 224 38 238 +135.76 ± 12.81 0 5 58 183 4 +321.19 ± 45.36
464856 ncm-dbt-04 568395 500 215 55 230 +115.22 ± 13.2 0 3 90 151 6 +249.64 ± 35.69
464855 ncm-dbt-02 584958 500 215 45 240 +123.02 ± 13.11 0 4 77 164 5 +275.45 ± 39.01
464854 ncm-dbt-01 580821 500 230 53 217 +128.55 ± 14.26 0 7 68 166 9 +282.94 ± 41.76
464853 ncm-dbt-05 581070 500 214 40 246 +126.17 ± 12.49 0 4 70 174 2 +293.29 ± 41.07
464852 ncm-dbt-03 585632 500 215 44 241 +123.81 ± 13.28 0 7 68 172 3 +282.94 ± 41.76
464851 ncm-dbt-02 585421 500 214 38 248 +127.76 ± 12.26 0 2 73 172 3 +295.94 ± 39.99
464850 ncm-dbt-04 566060 500 219 48 233 +123.81 ± 12.73 0 4 74 169 3 +282.94 ± 39.86
464849 ncm-dbt-01 583950 500 214 37 249 +128.55 ± 13.38 0 6 66 173 5 +293.29 ± 42.41
464848 ncm-dbt-05 586139 500 224 50 226 +126.17 ± 12.68 0 3 74 169 4 +288.06 ± 39.79
464847 ncm-dbt-03 586520 500 228 45 227 +133.34 ± 13.08 0 2 71 169 8 +301.33 ± 40.6
464846 ncm-dbt-04 567205 500 209 38 253 +123.81 ± 13.28 0 5 74 166 5 +277.93 ± 39.92
464845 ncm-dbt-02 587155 500 219 59 222 +115.23 ± 13.02 1 4 80 164 1 +263.42 ± 38.27
464844 ncm-dbt-01 581860 500 215 37 248 +129.35 ± 12.41 0 2 72 172 4 +298.62 ± 40.29
464843 ncm-dbt-05 577028 500 210 38 252 +124.6 ± 12.71 0 3 76 167 4 +282.94 ± 39.21
464842 ncm-dbt-03 583321 500 220 44 236 +127.76 ± 12.45 0 2 74 170 4 +293.29 ± 39.69
464841 ncm-dbt-04 568434 500 215 48 237 +120.67 ± 13.32 0 3 84 156 7 +263.42 ± 37.11
464840 ncm-dbt-02 586646 500 216 45 239 +123.81 ± 12.92 0 3 78 164 5 +277.93 ± 38.66
464839 ncm-dbt-01 583028 500 228 42 230 +135.76 ± 13.2 0 4 63 176 7 +312.48 ± 43.44
464838 ncm-dbt-05 579372 500 216 49 235 +120.67 ± 12.22 0 1 84 162 3 +273.0 ± 36.86
464837 ncm-dbt-03 583992 500 212 56 232 +112.14 ± 13.04 0 6 84 158 2 +249.64 ± 37.33
464836 ncm-dbt-04 571391 500 217 50 233 +120.67 ± 13.5 0 7 73 166 4 +270.57 ± 40.25
464835 ncm-dbt-02 586520 500 217 49 234 +121.46 ± 14.01 1 6 72 166 5 +273.0 ± 40.54
464834 ncm-dbt-05 586646 500 219 43 238 +127.76 ± 13.57 0 5 71 167 7 +285.49 ± 40.81
464833 ncm-dbt-01 585885 500 205 51 244 +110.6 ± 12.88 0 7 82 161 0 +249.64 ± 37.86
464832 ncm-dbt-03 586308 500 219 42 239 +128.55 ± 11.83 0 1 73 174 2 +301.33 ± 39.86

Commit

Commit ID 4a6c7e77a5a8eb1d5eec1ce1ff199773fb885f86
Author Joost VandeVondele
Date 2026-04-19 11:51:09 UTC
[CI] Cleanup artifact content (part 2) removes temp_builds directory before packaging, even more. closes https://github.com/official-stockfish/Stockfish/pull/6750 No functional change
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