Dev Builds » 20260819-1639

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 06:47:10 583897 4000 1782 326 1892 +132.54 ± 4.44 0 20 542 1400 38 +307.54 ± 14.59
ncm-dbt-02 06:49:00 591627 4000 1837 279 1884 +142.87 ± 4.38 1 17 451 1485 46 +343.26 ± 16.04
ncm-dbt-03 06:45:54 577255 4000 1803 320 1877 +135.25 ± 4.47 0 25 507 1428 40 +316.43 ± 15.12
ncm-dbt-04 06:48:43 566958 4000 1825 309 1866 +138.59 ± 4.4 0 20 486 1452 42 +327.94 ± 15.44
ncm-dbt-05 06:47:32 603549 4000 1827 292 1881 +140.52 ± 4.42 0 18 478 1455 49 +332.55 ± 15.57
20000 9074 1526 9400 +137.94 ± 1.98 1 100 2464 7220 215 +325.22 ± 6.85

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
482879 ncm-dbt-04 567878 500 230 39 231 +139.81 ± 12.67 0 4 56 185 5 +333.32 ± 46.21
482878 ncm-dbt-02 593672 500 234 25 241 +154.7 ± 11.94 0 0 50 191 9 +381.69 ± 48.77
482877 ncm-dbt-05 604802 500 237 39 224 +145.54 ± 12.22 0 2 54 188 6 +352.8 ± 47.05
482876 ncm-dbt-03 578300 500 224 40 236 +134.15 ± 12.86 0 4 63 178 5 +312.48 ± 43.44
482875 ncm-dbt-01 584537 500 226 38 236 +137.37 ± 12.96 0 1 69 171 9 +312.48 ± 41.11
482874 ncm-dbt-04 567522 500 228 38 234 +138.99 ± 12.9 0 2 64 176 8 +321.19 ± 42.95
482873 ncm-dbt-02 591125 500 222 40 238 +132.54 ± 13.28 0 5 64 175 6 +304.07 ± 43.1
482872 ncm-dbt-03 577356 500 221 47 232 +126.17 ± 13.06 0 5 70 171 4 +288.06 ± 41.11
482871 ncm-dbt-05 597556 500 229 28 243 +148.02 ± 11.19 0 1 50 196 3 +374.11 ± 48.94
482870 ncm-dbt-01 582819 500 220 40 240 +130.94 ± 11.96 0 0 74 172 4 +304.07 ± 39.39
482869 ncm-dbt-03 575598 500 227 41 232 +135.76 ± 12.42 0 3 62 181 4 +321.19 ± 43.77
482868 ncm-dbt-04 567601 500 219 52 229 +120.67 ± 12.02 0 2 80 167 1 +277.93 ± 38.02
482867 ncm-dbt-02 591254 500 226 40 234 +135.76 ± 12.81 1 3 58 185 3 +327.18 ± 45.37
482866 ncm-dbt-05 605252 500 225 32 243 +141.44 ± 13.78 0 5 57 178 10 +324.17 ± 45.77
482865 ncm-dbt-01 580613 500 215 39 246 +127.76 ± 12.84 0 4 70 172 4 +293.29 ± 41.07
482864 ncm-dbt-03 574378 500 235 41 224 +142.25 ± 12.78 0 4 54 186 6 +339.63 ± 47.1
482863 ncm-dbt-02 590567 500 226 29 245 +144.71 ± 11.83 0 1 56 188 5 +352.8 ± 46.04
482862 ncm-dbt-04 566296 500 231 43 226 +137.37 ± 13.71 0 5 61 175 9 +312.48 ± 44.19
482861 ncm-dbt-01 585843 500 233 48 219 +134.95 ± 12.64 0 2 67 175 6 +312.48 ± 41.9
482860 ncm-dbt-05 604712 500 230 42 228 +137.37 ± 11.94 0 1 64 181 4 +327.18 ± 42.83
482859 ncm-dbt-03 574744 500 224 35 241 +138.18 ± 12.53 0 2 63 179 6 +324.17 ± 43.32
482858 ncm-dbt-04 567601 500 229 36 235 +141.44 ± 11.98 0 2 57 187 4 +342.85 ± 45.71
482857 ncm-dbt-02 590739 500 231 31 238 +147.19 ± 11.24 0 1 51 195 3 +370.41 ± 48.42
482856 ncm-dbt-01 584201 500 225 35 240 +138.99 ± 12.7 0 5 54 187 4 +333.32 ± 47.06
482855 ncm-dbt-05 602159 500 216 36 248 +130.94 ± 12.17 0 2 69 176 3 +306.84 ± 41.23
482854 ncm-dbt-03 577971 500 225 39 236 +135.76 ± 13.01 0 5 59 181 5 +318.25 ± 44.96
482853 ncm-dbt-02 591857 500 237 45 218 +140.62 ± 13.04 0 4 57 182 7 +330.23 ± 45.79
482852 ncm-dbt-04 566336 500 215 36 249 +130.14 ± 12.39 0 3 68 176 3 +304.07 ± 41.65
482851 ncm-dbt-01 582569 500 218 37 245 +131.74 ± 12.93 0 3 69 172 6 +301.33 ± 41.33
482850 ncm-dbt-05 602427 500 227 42 231 +134.95 ± 12.84 0 3 65 176 6 +312.48 ± 42.67
482849 ncm-dbt-03 579661 500 223 41 236 +132.54 ± 12.52 0 1 72 171 6 +304.07 ± 40.16
482848 ncm-dbt-02 590438 500 231 36 233 +143.07 ± 12.12 0 0 62 181 7 +339.63 ± 43.41
482847 ncm-dbt-04 565390 500 236 31 233 +151.34 ± 10.98 0 0 49 197 4 +385.59 ± 49.31
482846 ncm-dbt-05 598612 500 229 37 234 +140.62 ± 13.04 0 3 60 179 8 +327.18 ± 44.54
482845 ncm-dbt-01 583782 500 221 41 238 +130.94 ± 12.37 0 3 67 177 3 +306.84 ± 41.99
482844 ncm-dbt-03 580033 500 224 36 240 +137.37 ± 11.94 0 1 64 181 4 +327.18 ± 42.83
482843 ncm-dbt-04 567047 500 237 34 229 +149.68 ± 12.45 0 2 51 189 8 +363.2 ± 48.51
482842 ncm-dbt-05 612872 500 234 36 230 +145.54 ± 12.64 0 1 59 181 9 +342.85 ± 44.76
482841 ncm-dbt-02 593369 500 230 33 237 +144.71 ± 12.47 0 3 53 188 6 +349.43 ± 47.56
482840 ncm-dbt-01 586816 500 224 48 228 +127.76 ± 12.06 0 2 72 174 2 +298.62 ± 40.29

Commit

Commit ID ceb059eb48fb8e556df8feff6f8a24e45d03fa11
Author Joost VandeVondele
Date 2026-08-19 16:39:57 UTC
Convert movetime when nodestime is in force elapsed() returns nodes while nodestime is active, but check_time compared it against limits.movetime in milliseconds without conversion, so movetime silently meant nodes. Convert movetime to nodes before init's early return. closes https://github.com/official-stockfish/Stockfish/pull/7068 No functional change Co-authored-by: ppigazzini <pasquale.pigazzini@gmail.com>
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