Dev Builds » 20260922-1603

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 06:44:00 583717 4000 1789 291 1920 +136.77 ± 4.29 0 13 510 1443 34 +324.17 ± 15.03
ncm-dbt-02 06:44:39 590919 4000 1805 278 1917 +139.71 ± 4.36 0 14 490 1451 45 +331.0 ± 15.35
ncm-dbt-03 06:45:11 584502 3992 1819 284 1889 +140.83 ± 4.33 0 18 464 1475 39 +337.64 ± 15.81
ncm-dbt-04 06:44:12 567558 4000 1811 275 1914 +140.62 ± 4.43 0 19 475 1457 49 +332.93 ± 15.62
ncm-dbt-05 06:45:24 604390 4008 1844 279 1885 +143.27 ± 4.46 0 16 467 1461 60 +338.83 ± 15.75
20000 9068 1407 9525 +140.24 ± 1.96 0 80 2406 7287 227 +332.86 ± 6.92

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
485728 ncm-dbt-05 603545 8 4 1 3 +136.8 ± 89.09 0 0 1 3 0 +337.69 ± 541.44
485727 ncm-dbt-03 585464 492 222 42 228 +133.28 ± 13.02 0 5 60 177 4 +312.09 ± 44.57
485726 ncm-dbt-02 590567 500 228 37 235 +139.81 ± 13.07 0 3 61 178 8 +324.17 ± 44.15
485725 ncm-dbt-01 583447 500 219 30 251 +138.18 ± 11.48 0 0 64 183 3 +333.32 ± 42.66
485724 ncm-dbt-05 600646 500 236 25 239 +156.39 ± 12.94 0 1 50 186 13 +374.11 ± 48.94
485723 ncm-dbt-04 569031 500 228 29 243 +146.36 ± 12.4 0 3 51 190 6 +356.21 ± 48.54
485722 ncm-dbt-03 583614 500 232 35 233 +144.71 ± 12.88 0 2 58 181 9 +339.63 ± 45.29
485721 ncm-dbt-02 589326 500 227 38 235 +138.18 ± 12.12 0 1 64 180 5 +327.18 ± 42.83
485720 ncm-dbt-01 582110 500 226 36 238 +138.99 ± 11.88 0 1 62 183 4 +333.32 ± 43.57
485719 ncm-dbt-05 600602 500 225 40 235 +134.95 ± 11.83 0 3 60 186 1 +327.18 ± 44.54
485718 ncm-dbt-04 569111 500 219 47 234 +124.6 ± 13.09 0 3 78 163 6 +277.93 ± 38.66
485717 ncm-dbt-03 586139 500 227 43 230 +134.15 ± 12.86 0 4 63 178 5 +312.48 ± 43.44
485716 ncm-dbt-05 604128 500 232 36 232 +143.89 ± 12.3 0 2 56 186 6 +346.12 ± 46.15
485715 ncm-dbt-01 583196 500 224 32 244 +140.62 ± 11.59 0 0 62 184 4 +339.63 ± 43.41
485714 ncm-dbt-02 592288 500 225 30 245 +143.07 ± 12.12 0 2 56 187 5 +346.12 ± 46.15
485713 ncm-dbt-04 568752 500 232 28 240 +150.51 ± 13.03 0 4 47 190 9 +363.2 ± 50.62
485712 ncm-dbt-03 583405 500 220 33 247 +136.56 ± 11.97 0 2 62 183 3 +327.18 ± 43.69
485711 ncm-dbt-05 600026 500 235 34 231 +148.02 ± 12.1 0 1 54 188 7 +359.68 ± 46.95
485710 ncm-dbt-02 590868 500 225 43 232 +132.54 ± 11.91 0 0 72 174 4 +309.64 ± 40.0
485709 ncm-dbt-01 585421 500 221 39 240 +132.54 ± 11.49 0 0 70 178 2 +315.34 ± 40.62
485708 ncm-dbt-04 562885 500 230 36 234 +142.25 ± 12.37 0 1 61 181 7 +336.46 ± 43.96
485707 ncm-dbt-01 584117 500 230 48 222 +132.54 ± 12.91 0 4 65 176 5 +306.84 ± 42.73
485706 ncm-dbt-05 600646 500 227 34 239 +141.44 ± 12.81 0 1 64 176 9 +327.18 ± 42.83
485705 ncm-dbt-03 584495 500 231 25 244 +152.18 ± 10.92 0 0 48 198 4 +389.55 ± 49.86
485704 ncm-dbt-02 588430 500 225 28 247 +144.71 ± 11.61 0 1 55 190 4 +356.21 ± 46.49
485703 ncm-dbt-04 568474 500 226 36 238 +138.99 ± 12.3 0 1 64 179 6 +327.18 ± 42.83
485702 ncm-dbt-05 601713 500 220 39 241 +131.74 ± 12.74 0 5 62 180 3 +309.64 ± 43.82
485701 ncm-dbt-01 585211 500 225 34 241 +139.81 ± 12.26 0 2 60 183 5 +333.32 ± 44.47
485700 ncm-dbt-02 590481 500 224 33 243 +139.81 ± 13.07 0 3 61 178 8 +324.17 ± 44.15
485699 ncm-dbt-03 583154 500 222 45 233 +128.55 ± 11.83 0 3 67 180 0 +306.84 ± 41.99
485698 ncm-dbt-04 568156 500 232 38 230 +142.25 ± 12.98 0 2 61 178 9 +330.23 ± 44.08
485697 ncm-dbt-01 585000 500 218 34 248 +134.15 ± 12.67 0 4 62 180 4 +315.35 ± 43.81
485696 ncm-dbt-05 603903 500 228 31 241 +144.71 ± 12.26 0 0 61 181 8 +342.85 ± 43.79
485695 ncm-dbt-02 592418 500 226 38 236 +137.37 ± 12.56 0 3 61 181 5 +324.17 ± 44.15
485694 ncm-dbt-03 584453 500 229 29 242 +147.19 ± 12.57 0 2 54 186 8 +352.8 ± 47.05
485693 ncm-dbt-04 568236 500 217 27 256 +138.99 ± 12.3 0 4 55 188 3 +336.46 ± 46.65
485692 ncm-dbt-03 585295 500 236 32 232 +150.51 ± 11.51 0 0 52 192 6 +374.1 ± 47.75
485691 ncm-dbt-01 581236 500 226 38 236 +137.37 ± 12.76 0 2 65 176 7 +318.25 ± 42.59
485690 ncm-dbt-02 592979 500 225 31 244 +142.25 ± 12.16 0 1 60 183 6 +339.63 ± 44.35
485689 ncm-dbt-05 624309 500 237 39 224 +145.54 ± 13.83 0 3 59 175 13 +330.23 ± 44.94
485688 ncm-dbt-04 565823 500 227 34 239 +141.44 ± 11.55 0 1 58 188 3 +346.12 ± 45.18

Commit

Commit ID d8f77ce4450afcd03a442be29fd7df5821741dea
Author Carlos Esparza
Date 2026-09-22 16:03:53 UTC
merge the template and non-template versions of attacks_bb If we tell the compiler to inline properly, we can pass constexpr parameters of a function call as arguments instead of having to use templates, with no performance loss. passed non-reg STC: https://tests.stockfishchess.org/tests/view/6aa791c9a8284b37a0a05cd2 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 112544 W: 28589 L: 28463 D: 55492 Ptnml(0-2): 162, 11683, 32439, 11843, 145 closes https://github.com/official-stockfish/Stockfish/pull/7171 No functional change
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