Dev Builds » 20260710-1812

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 06:43:22 582877 4000 1780 297 1923 +135.25 ± 4.46 0 24 509 1427 40 +316.43 ± 15.09
ncm-dbt-02 06:44:07 591261 4000 1783 314 1903 +133.85 ± 4.5 0 27 517 1416 40 +311.41 ± 14.97
ncm-dbt-03 06:45:49 578397 4012 1804 300 1908 +136.92 ± 4.34 1 12 513 1442 38 +323.65 ± 14.98
ncm-dbt-04 06:45:19 566770 4000 1797 318 1885 +134.85 ± 4.39 1 19 513 1434 33 +317.89 ± 15.01
ncm-dbt-05 06:45:02 585330 3988 1774 307 1907 +134.09 ± 4.45 1 24 509 1427 33 +315.1 ± 15.09
20000 8938 1536 9526 +134.99 ± 1.98 3 106 2561 7146 184 +316.87 ± 6.71

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
478500 ncm-dbt-03 578918 12 4 0 8 +120.31 ± 75.55 0 0 2 4 0 +279.41 ± 548.26
478499 ncm-dbt-05 585843 488 212 33 243 +133.66 ± 12.25 0 2 64 175 3 +316.3 ± 42.93
478498 ncm-dbt-04 564331 500 236 35 229 +148.02 ± 11.19 0 1 50 196 3 +374.11 ± 48.94
478497 ncm-dbt-01 582861 500 227 42 231 +134.95 ± 11.83 0 3 60 186 1 +327.18 ± 44.54
478496 ncm-dbt-02 591082 500 220 43 237 +128.55 ± 13.56 0 4 73 165 8 +285.49 ± 40.16
478495 ncm-dbt-03 576619 500 226 29 245 +144.71 ± 11.61 0 1 55 190 4 +356.21 ± 46.49
478494 ncm-dbt-05 583740 500 210 37 253 +125.38 ± 13.43 0 7 67 172 4 +285.49 ± 42.08
478493 ncm-dbt-04 566612 500 221 49 230 +124.6 ± 12.71 0 4 73 170 3 +285.49 ± 40.16
478492 ncm-dbt-01 583489 500 224 37 239 +136.56 ± 13.55 0 5 61 176 8 +312.48 ± 44.19
478491 ncm-dbt-02 592029 500 220 47 233 +125.38 ± 13.25 0 6 69 171 4 +285.49 ± 41.44
478490 ncm-dbt-03 575517 500 230 39 231 +139.81 ± 13.07 0 4 58 181 7 +327.18 ± 45.37
478489 ncm-dbt-05 580779 500 232 37 231 +143.07 ± 11.91 0 0 61 183 6 +342.85 ± 43.79
478488 ncm-dbt-04 569390 500 218 31 251 +136.56 ± 12.18 0 3 60 184 3 +327.18 ± 44.54
478487 ncm-dbt-01 583656 500 217 43 240 +126.17 ± 13.06 0 5 70 171 4 +288.06 ± 41.11
478486 ncm-dbt-02 592634 500 219 46 235 +125.38 ± 12.12 0 2 75 171 2 +290.66 ± 39.4
478485 ncm-dbt-03 579868 500 228 37 235 +139.81 ± 11.84 1 0 58 189 2 +346.12 ± 45.18
478484 ncm-dbt-05 582903 500 227 35 238 +140.62 ± 12.23 0 2 59 184 5 +336.46 ± 44.87
478483 ncm-dbt-01 581444 500 228 42 230 +135.76 ± 13.01 0 3 65 175 7 +312.48 ± 42.67
478482 ncm-dbt-04 567561 500 224 45 231 +130.15 ± 13.16 1 3 66 176 4 +304.07 ± 42.38
478481 ncm-dbt-02 591426 500 222 35 243 +136.56 ± 12.98 0 6 55 185 4 +324.17 ± 46.56
478480 ncm-dbt-03 580406 500 220 35 245 +134.95 ± 13.03 0 1 72 168 9 +304.07 ± 40.16
478479 ncm-dbt-01 583489 500 217 38 245 +130.14 ± 13.7 0 5 69 168 8 +290.66 ± 41.43
478478 ncm-dbt-04 565037 500 218 41 241 +128.55 ± 12.04 0 1 74 172 3 +298.62 ± 39.56
478477 ncm-dbt-05 581569 500 229 47 224 +132.54 ± 13.1 1 3 63 179 4 +312.48 ± 43.44
478476 ncm-dbt-02 591297 500 228 33 239 +143.07 ± 12.95 0 4 54 185 7 +339.63 ± 47.1
478475 ncm-dbt-03 577684 500 214 38 248 +127.76 ± 11.86 0 2 71 176 1 +301.33 ± 40.6
478474 ncm-dbt-05 582527 500 218 44 238 +126.17 ± 13.06 0 5 70 171 4 +288.06 ± 41.11
478473 ncm-dbt-01 583447 500 221 40 239 +131.74 ± 11.94 0 2 67 179 2 +312.48 ± 41.9
478472 ncm-dbt-04 565312 500 224 38 238 +135.76 ± 12.62 0 3 63 179 5 +318.25 ± 43.39
478471 ncm-dbt-02 589368 500 219 34 247 +134.95 ± 12.24 0 1 68 176 5 +315.35 ± 41.44
478470 ncm-dbt-03 579372 500 222 40 238 +132.54 ± 11.91 0 1 69 177 3 +312.48 ± 41.11
478469 ncm-dbt-01 582652 500 230 32 238 +145.54 ± 12.22 0 0 60 182 8 +346.11 ± 44.19
478468 ncm-dbt-05 584369 500 218 39 243 +130.14 ± 12.19 0 2 70 175 3 +304.07 ± 40.91
478467 ncm-dbt-03 580696 500 227 40 233 +136.56 ± 12.79 0 2 66 175 7 +315.35 ± 42.24
478466 ncm-dbt-04 568792 500 229 37 234 +140.62 ± 12.23 0 2 59 184 5 +336.46 ± 44.87
478465 ncm-dbt-02 589839 500 227 34 239 +141.44 ± 11.55 0 1 58 188 3 +346.12 ± 45.18
478464 ncm-dbt-01 581985 500 216 23 261 +141.44 ± 11.32 0 1 57 190 2 +349.43 ± 45.6
478463 ncm-dbt-05 600913 500 228 35 237 +141.44 ± 12.2 0 3 55 188 4 +342.85 ± 46.64
478462 ncm-dbt-04 567126 500 227 42 231 +134.95 ± 12.84 0 2 68 173 7 +309.64 ± 41.56
478461 ncm-dbt-02 592418 500 228 42 230 +135.76 ± 13.01 0 3 65 175 7 +312.48 ± 42.67
478460 ncm-dbt-03 576496 500 233 42 225 +139.81 ± 12.05 0 1 62 182 5 +333.32 ± 43.57

Commit

Commit ID 48a9118251609a0902df7889f7fe241921ac358f
Author Robert Nurnberg
Date 2026-07-10 18:12:38 UTC
Minor cleanups June 2026 In the spirit of previous such PRs, this PR proposes a collection of nonfunctional changes. I am happy to incorporate changes from other devs, and revert some of the proposed changes if the maintainers ask me to. Apart from trivial changes, the proposed changes so far include: * A requested edit to `AUTHORS` and a resorting of all entries, following DIN 5007 for the treatment of any special characters. * Exclude the two recent integer type renaming commits from git blame. * Tightening of some static asserts in `history.h` to avoid overflows. (Note that rounding errors for floating point types could lead to the assert in `operator<<` triggering at run-time.) * Re-instate the 0.5s maximal thinking time in case of a single legal move and reword the comment to make it clear that it should not be tuned. * ~~A small refactoring of the network loading code thanks to @dubslow.~~ * A refactoring of the "dtz is dtm" code, also thanks to @dubslow. closes https://github.com/official-stockfish/Stockfish/pull/6928 No functional change
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