Dev Builds » 20260426-0727

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 06:41:55 583076 4000 1710 391 1899 +119.01 ± 4.66 0 45 619 1308 28 +266.67 ± 13.68
ncm-dbt-02 06:43:19 586736 3998 1706 364 1928 +121.33 ± 4.6 0 33 625 1307 34 +271.98 ± 13.58
ncm-dbt-03 06:43:29 584008 4014 1734 372 1908 +122.75 ± 4.81 0 50 591 1320 46 +272.82 ± 14.02
ncm-dbt-04 06:42:15 567489 4000 1732 385 1883 +121.75 ± 4.58 0 37 607 1328 28 +275.14 ± 13.8
ncm-dbt-05 06:42:40 582255 3988 1707 340 1941 +124.12 ± 4.53 1 37 569 1368 19 +285.83 ± 14.27
20000 8589 1852 9559 +121.79 ± 2.07 1 202 3011 6631 155 +274.41 ± 6.19

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
466289 ncm-dbt-03 584537 14 4 1 9 +75.6 ± 101.52 0 1 2 4 0 +159.18 ± 377.67
466288 ncm-dbt-05 580365 488 201 53 234 +108.79 ± 13.77 0 7 86 147 4 +235.53 ± 36.87
466287 ncm-dbt-02 584076 498 217 40 241 +129.12 ± 12.45 0 2 72 171 4 +297.8 ± 40.28
466286 ncm-dbt-04 565154 500 223 55 222 +121.45 ± 13.31 0 4 80 160 6 +268.17 ± 38.21
466285 ncm-dbt-01 582945 500 216 50 234 +119.89 ± 13.68 0 7 75 163 5 +265.78 ± 39.69
466284 ncm-dbt-03 581777 500 219 49 232 +123.02 ± 14.33 0 4 84 150 12 +258.75 ± 37.2
466283 ncm-dbt-05 582861 500 216 46 238 +123.02 ± 13.29 0 7 69 171 3 +280.42 ± 41.44
466282 ncm-dbt-02 589497 500 218 44 238 +126.17 ± 13.24 0 7 65 175 3 +290.66 ± 42.73
466281 ncm-dbt-04 567720 500 223 43 234 +130.94 ± 12.56 0 4 65 178 3 +306.84 ± 42.73
466280 ncm-dbt-01 583698 500 209 44 247 +119.11 ± 12.62 0 3 82 162 3 +268.17 ± 37.61
466279 ncm-dbt-03 585843 500 217 48 235 +122.24 ± 14.0 0 10 65 171 4 +275.45 ± 42.59
466278 ncm-dbt-02 586604 500 218 46 236 +124.6 ± 13.09 0 4 75 166 5 +280.42 ± 39.57
466277 ncm-dbt-05 579537 500 212 33 255 +130.14 ± 11.78 0 2 68 179 1 +309.64 ± 41.56
466276 ncm-dbt-04 567205 500 220 40 240 +130.94 ± 12.76 0 3 69 173 5 +301.33 ± 41.33
466275 ncm-dbt-01 582903 500 211 63 226 +106.01 ± 14.2 0 9 90 145 6 +223.94 ± 36.07
466274 ncm-dbt-03 585084 500 213 43 244 +123.02 ± 12.93 0 4 76 166 4 +277.93 ± 39.29
466273 ncm-dbt-02 589027 500 211 46 243 +119.11 ± 12.8 0 2 86 157 5 +263.42 ± 36.51
466272 ncm-dbt-05 581319 500 216 43 241 +125.38 ± 12.51 0 5 68 176 1 +293.29 ± 41.75
466271 ncm-dbt-04 568037 500 217 44 239 +125.38 ± 12.32 0 4 70 175 1 +293.29 ± 41.07
466270 ncm-dbt-01 578753 500 221 41 238 +130.94 ± 11.96 0 3 65 181 1 +312.48 ± 42.67
466269 ncm-dbt-03 582819 500 216 45 239 +123.81 ± 14.15 0 9 67 168 6 +275.45 ± 42.01
466268 ncm-dbt-05 583321 500 212 48 240 +118.33 ± 12.81 1 4 75 170 0 +275.45 ± 39.63
466267 ncm-dbt-02 585843 500 204 42 254 +116.77 ± 12.65 0 1 91 153 5 +256.44 ± 35.22
466266 ncm-dbt-04 567244 500 217 55 228 +116.77 ± 13.19 0 4 85 156 5 +256.44 ± 36.95
466265 ncm-dbt-01 582652 500 221 38 241 +133.34 ± 12.49 0 5 59 184 2 +318.25 ± 44.96
466264 ncm-dbt-03 583740 500 221 47 232 +126.17 ± 13.24 0 4 74 166 6 +282.94 ± 39.86
466263 ncm-dbt-04 569230 500 204 48 248 +112.14 ± 13.05 0 8 78 164 0 +254.16 ± 38.89
466262 ncm-dbt-05 581777 500 219 41 240 +129.35 ± 13.17 0 6 64 176 4 +298.62 ± 43.1
466261 ncm-dbt-02 586435 500 219 36 245 +133.34 ± 12.49 0 2 68 175 5 +309.64 ± 41.56
466260 ncm-dbt-01 585548 500 207 56 237 +108.3 ± 12.88 0 5 91 152 2 +238.66 ± 35.65
466259 ncm-dbt-03 582945 500 216 49 235 +120.67 ± 14.01 0 9 70 166 5 +268.17 ± 41.1
466258 ncm-dbt-04 566572 500 215 50 235 +119.11 ± 12.8 0 4 80 163 3 +268.17 ± 38.21
466257 ncm-dbt-05 583824 500 224 39 237 +134.95 ± 12.24 0 1 68 176 5 +315.35 ± 41.44
466256 ncm-dbt-02 585506 500 213 50 237 +117.55 ± 13.53 0 6 80 159 5 +258.75 ± 38.32
466255 ncm-dbt-01 585169 500 214 46 240 +121.45 ± 13.14 0 7 70 171 2 +277.93 ± 41.14
466254 ncm-dbt-03 583279 500 216 37 247 +130.14 ± 12.19 0 2 70 175 3 +304.07 ± 40.91
466253 ncm-dbt-05 585042 500 207 37 256 +123.02 ± 12.56 0 5 71 173 1 +285.49 ± 40.81
466252 ncm-dbt-04 568752 500 213 50 237 +117.55 ± 13.53 0 6 80 159 5 +258.75 ± 38.32
466251 ncm-dbt-02 586901 500 206 60 234 +104.49 ± 13.55 0 9 88 151 2 +228.08 ± 36.51
466250 ncm-dbt-01 582945 500 211 53 236 +113.68 ± 13.89 0 6 87 150 7 +243.0 ± 36.62
466249 ncm-dbt-03 586054 500 212 53 235 +114.45 ± 13.89 0 7 83 154 6 +247.41 ± 37.61

Commit

Commit ID e68ca3c187ac2166455392e97904640d44224ae8
Author Dieter Dobbelaere
Date 2026-04-26 07:27:08 UTC
Rename Linux universal release package/binary Rename Linux universal release package from `stockfish-ubuntu-x86-64-universal.tar.gz` to `stockfish-linux-x86-64-universal.tar.gz` (and similar for the binary), as the bundled binary should run on any Linux distro with glibc >= 2.35 (which is the glibc version of the Ubuntu 22.04 build server). Note that the Linux universal binary is built with static libstdc++ linkage, so this adds no extra dependency. This change will hopefully make it less confusing for users, and in line with how we show it on stockfishchess.org (as Linux). closes https://github.com/official-stockfish/Stockfish/pull/6760 No functional change
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