Dev Builds » 20260922-1602

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 06:30:45 583661 3854 1767 273 1814 +142.11 ± 4.47 0 15 451 1413 48 +338.35 ± 16.02
ncm-dbt-02 06:30:23 590462 3862 1789 260 1813 +145.5 ± 4.36 0 12 424 1449 46 +352.79 ± 16.53
ncm-dbt-03 06:30:50 583826 3878 1774 271 1833 +142.08 ± 4.47 0 12 465 1409 53 +336.31 ± 15.76
ncm-dbt-04 06:30:25 567611 3860 1750 253 1857 +142.18 ± 4.39 0 14 447 1427 42 +341.15 ± 16.09
ncm-dbt-05 06:30:29 604937 3850 1756 271 1823 +141.32 ± 4.43 0 13 459 1408 45 +336.5 ± 15.87
19304 8836 1328 9140 +142.64 ± 1.98 0 66 2246 7106 234 +340.94 ± 7.17

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
485811 ncm-dbt-05 601001 350 155 29 166 +130.94 ± 14.37 0 1 49 123 2 +307.24 ± 49.07
485810 ncm-dbt-01 583489 354 152 28 174 +127.08 ± 15.38 0 3 50 121 3 +290.41 ± 48.82
485809 ncm-dbt-04 567799 360 160 13 187 +150.65 ± 14.18 0 1 36 138 5 +371.23 ± 58.16
485808 ncm-dbt-02 591469 362 167 28 167 +140.61 ± 13.66 0 0 45 133 3 +339.13 ± 51.22
485807 ncm-dbt-03 582903 378 169 18 191 +146.97 ± 13.29 0 0 42 143 4 +361.23 ± 53.28
485806 ncm-dbt-05 602070 500 235 38 227 +144.71 ± 12.05 0 3 51 192 4 +356.21 ± 48.54
485805 ncm-dbt-04 567284 500 234 39 227 +143.07 ± 12.54 0 1 61 180 8 +336.46 ± 43.96
485804 ncm-dbt-01 583531 500 229 35 236 +142.25 ± 12.58 0 1 62 179 8 +333.32 ± 43.57
485803 ncm-dbt-02 585759 500 231 35 234 +143.89 ± 11.65 0 1 56 189 4 +352.8 ± 46.04
485802 ncm-dbt-03 582778 500 229 37 234 +140.62 ± 12.02 0 1 61 183 5 +336.46 ± 43.96
485801 ncm-dbt-05 598568 500 220 36 244 +134.15 ± 12.47 0 1 70 173 6 +309.64 ± 40.79
485800 ncm-dbt-04 567403 500 227 31 242 +143.89 ± 11.19 0 1 54 193 2 +359.68 ± 46.95
485799 ncm-dbt-01 584285 500 230 35 235 +143.07 ± 12.34 0 2 57 185 6 +342.85 ± 45.71
485798 ncm-dbt-03 582485 500 230 37 233 +141.44 ± 13.01 0 4 56 183 7 +333.32 ± 46.21
485797 ncm-dbt-02 590782 500 234 35 231 +146.36 ± 11.96 0 3 49 194 4 +363.2 ± 49.57
485796 ncm-dbt-05 601891 500 236 33 231 +149.68 ± 12.87 0 1 56 182 11 +352.8 ± 46.04
485795 ncm-dbt-04 566099 500 227 33 240 +142.25 ± 11.95 0 2 56 188 4 +346.12 ± 46.15
485794 ncm-dbt-01 583908 500 235 35 230 +147.19 ± 11.7 0 0 56 188 6 +359.67 ± 45.87
485793 ncm-dbt-02 591943 500 226 23 251 +149.68 ± 11.56 0 1 50 194 5 +374.11 ± 48.94
485792 ncm-dbt-03 584537 500 226 32 242 +142.25 ± 12.37 0 3 55 187 5 +342.85 ± 46.64
485791 ncm-dbt-04 568355 500 229 35 236 +142.25 ± 11.73 0 0 61 184 5 +342.85 ± 43.79
485790 ncm-dbt-05 598083 500 225 30 245 +143.07 ± 11.69 0 1 57 188 4 +349.43 ± 45.6
485789 ncm-dbt-02 590825 500 237 44 219 +141.44 ± 12.81 0 2 61 179 8 +330.23 ± 44.08
485788 ncm-dbt-01 587113 500 236 38 226 +145.54 ± 11.79 0 0 58 186 6 +352.79 ± 45.01
485787 ncm-dbt-03 583992 500 232 45 223 +136.56 ± 12.98 0 0 73 167 10 +306.84 ± 39.69
485786 ncm-dbt-04 567086 500 232 27 241 +151.34 ± 12.14 0 1 51 190 8 +370.41 ± 48.42
485785 ncm-dbt-05 604083 500 225 36 239 +138.18 ± 13.32 0 4 61 177 8 +318.25 ± 44.18
485784 ncm-dbt-01 580862 500 231 31 238 +147.19 ± 12.78 0 4 49 190 7 +356.21 ± 49.54
485783 ncm-dbt-02 588472 500 227 31 242 +143.89 ± 12.92 0 3 56 183 8 +339.63 ± 46.2
485782 ncm-dbt-03 583656 500 226 42 232 +134.15 ± 13.24 0 2 71 168 9 +301.33 ± 40.6
485781 ncm-dbt-05 604173 500 234 30 236 +150.51 ± 11.51 0 1 49 195 5 +377.87 ± 49.47
485780 ncm-dbt-04 568593 500 218 32 250 +135.76 ± 13.01 0 5 59 181 5 +318.25 ± 44.96
485779 ncm-dbt-01 581485 500 236 37 227 +146.36 ± 12.81 0 4 50 189 7 +352.8 ± 49.02
485778 ncm-dbt-02 591943 500 230 28 242 +148.84 ± 11.61 0 0 54 190 6 +366.77 ± 46.78
485777 ncm-dbt-03 584076 500 229 26 245 +149.68 ± 12.01 0 1 52 190 7 +366.78 ± 47.92
485776 ncm-dbt-05 629627 500 226 39 235 +136.56 ± 12.18 0 1 66 178 5 +321.19 ± 42.12
485775 ncm-dbt-03 586181 500 233 34 233 +146.36 ± 11.96 0 1 55 188 6 +356.21 ± 46.49
485774 ncm-dbt-02 592504 500 237 36 227 +148.02 ± 12.53 0 2 53 187 8 +356.21 ± 47.52
485773 ncm-dbt-04 568275 500 223 43 234 +130.94 ± 12.76 0 3 69 173 5 +301.33 ± 41.33
485772 ncm-dbt-01 584622 500 218 34 248 +134.15 ± 12.27 0 1 69 175 5 +312.48 ± 41.11

Commit

Commit ID bf45059688274b7b633ad48737751a9bf81d74cb
Author mstembera
Date 2026-09-22 16:02:35 UTC
Optimize HalfKAv2_hm::make_index() STC: https://tests.stockfishchess.org/tests/view/6aa3fd45a8284b37a0a05832 LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 123936 W: 31663 L: 31257 D: 61016 Ptnml(0-2): 163, 12786, 35652, 13216, 151 closes https://github.com/official-stockfish/Stockfish/pull/7182 No functional change
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