Dev Builds » 20260101-1517

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 06:46:18 581245 3992 1713 365 1914 +122.11 ± 4.55 0 33 609 1327 27 +276.58 ± 13.76
ncm-dbt-02 06:44:42 586259 4000 1723 351 1926 +124.2 ± 4.57 0 34 591 1344 31 +282.0 ± 13.99
ncm-dbt-03 06:45:43 586180 4016 1744 378 1894 +123.08 ± 4.63 0 40 595 1340 33 +277.83 ± 13.95
ncm-dbt-04 06:45:50 566446 3986 1694 370 1922 +119.95 ± 4.51 0 32 627 1312 22 +271.35 ± 13.55
ncm-dbt-05 06:45:43 583029 4006 1745 386 1875 +122.73 ± 4.63 0 38 602 1329 34 +276.38 ± 13.86
20000 8619 1850 9531 +122.42 ± 2.05 0 177 3024 6652 147 +276.81 ± 6.17

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
448202 ncm-dbt-05 584453 6 2 1 3 +58.39 ± 217.67 0 1 0 2 0 +120.37 ± 762.49
448201 ncm-dbt-03 584243 16 5 2 9 +65.91 ± 89.0 0 1 3 4 0 +136.97 ± 241.58
448200 ncm-dbt-04 567878 486 201 50 235 +111.64 ± 13.27 0 6 82 153 2 +248.06 ± 37.79
448199 ncm-dbt-01 581070 492 211 47 234 +120.41 ± 13.64 0 7 72 163 4 +269.61 ± 40.54
448198 ncm-dbt-02 587452 500 220 45 235 +126.97 ± 12.47 0 3 72 172 3 +293.29 ± 40.39
448197 ncm-dbt-05 580157 500 214 56 230 +113.68 ± 13.55 0 6 85 154 5 +247.41 ± 37.09
448196 ncm-dbt-03 583572 500 214 35 251 +130.14 ± 12.78 0 4 67 175 4 +301.33 ± 42.04
448195 ncm-dbt-04 566060 500 210 45 245 +119.11 ± 12.99 0 5 78 164 3 +268.17 ± 38.8
448194 ncm-dbt-01 582193 500 226 48 226 +129.35 ± 12.01 0 2 70 176 2 +304.07 ± 40.91
448193 ncm-dbt-05 583572 500 223 45 232 +129.35 ± 12.8 0 3 71 171 5 +295.94 ± 40.69
448192 ncm-dbt-02 588686 500 203 45 252 +113.68 ± 12.5 0 3 88 157 2 +254.16 ± 36.15
448191 ncm-dbt-03 586901 500 212 56 232 +112.14 ± 12.14 0 2 91 156 1 +251.89 ± 35.35
448190 ncm-dbt-04 566967 500 228 41 231 +136.56 ± 12.39 0 0 70 173 7 +315.34 ± 40.62
448189 ncm-dbt-01 582277 500 210 29 261 +131.74 ± 11.94 0 2 67 179 2 +312.48 ± 41.9
448188 ncm-dbt-03 587070 500 227 57 216 +123.02 ± 12.74 0 2 81 162 5 +275.45 ± 37.75
448187 ncm-dbt-05 579413 500 218 40 242 +129.35 ± 13.17 0 5 67 173 5 +295.94 ± 42.08
448186 ncm-dbt-02 587113 500 219 46 235 +125.38 ± 13.79 0 7 69 168 6 +280.42 ± 41.44
448185 ncm-dbt-04 564291 500 208 44 248 +118.33 ± 12.81 0 6 75 168 1 +270.57 ± 39.67
448184 ncm-dbt-01 577930 500 220 47 233 +125.38 ± 12.89 0 1 82 160 7 +277.93 ± 37.36
448183 ncm-dbt-05 577274 500 217 47 236 +123.02 ± 13.11 0 4 77 164 5 +275.45 ± 39.01
448182 ncm-dbt-03 585084 500 212 40 248 +124.6 ± 13.27 0 6 70 170 4 +282.94 ± 41.13
448181 ncm-dbt-02 586520 500 213 41 246 +124.6 ± 13.8 0 9 64 173 4 +282.94 ± 42.98
448180 ncm-dbt-04 565154 500 208 43 249 +119.11 ± 12.62 0 3 82 162 3 +268.17 ± 37.61
448179 ncm-dbt-01 579578 500 214 57 229 +112.91 ± 13.04 0 7 80 162 1 +254.16 ± 38.36
448178 ncm-dbt-05 583992 500 221 46 233 +126.97 ± 11.88 0 2 72 175 1 +298.62 ± 40.29
448177 ncm-dbt-02 584622 500 217 47 236 +123.02 ± 12.93 0 4 76 166 4 +277.93 ± 39.29
448176 ncm-dbt-03 587240 500 225 42 233 +133.34 ± 14.17 0 8 59 175 8 +301.33 ± 44.81
448175 ncm-dbt-04 566809 500 214 51 235 +117.55 ± 12.27 0 3 82 164 1 +268.17 ± 37.61
448174 ncm-dbt-01 582527 500 214 48 238 +119.89 ± 12.98 0 4 80 162 4 +268.17 ± 38.21
448173 ncm-dbt-05 583070 500 215 49 236 +119.89 ± 13.16 0 3 84 157 6 +263.42 ± 37.11
448172 ncm-dbt-02 586520 500 225 47 228 +129.35 ± 12.41 0 1 75 169 5 +295.94 ± 39.27
448171 ncm-dbt-03 583154 500 226 39 235 +136.56 ± 12.98 0 4 61 179 6 +318.25 ± 44.18
448170 ncm-dbt-01 582318 500 197 44 259 +109.83 ± 13.89 0 8 86 151 5 +236.51 ± 36.93
448169 ncm-dbt-04 568156 500 214 48 238 +119.89 ± 12.23 0 3 79 167 1 +275.45 ± 38.39
448168 ncm-dbt-03 588132 500 204 58 238 +104.49 ± 13.39 0 8 90 150 2 +228.08 ± 36.04
448167 ncm-dbt-05 583950 500 215 50 235 +119.11 ± 12.99 0 7 72 170 1 +273.0 ± 40.54
448166 ncm-dbt-02 584159 500 205 46 249 +114.45 ± 13.72 0 7 82 156 5 +249.64 ± 37.86
448165 ncm-dbt-03 590224 500 219 49 232 +123.02 ± 12.93 0 5 73 169 3 +280.42 ± 40.21
448164 ncm-dbt-04 566257 500 211 48 241 +117.55 ± 13.36 0 6 79 161 4 +261.07 ± 38.58
448163 ncm-dbt-01 582068 500 221 45 234 +127.76 ± 12.06 0 2 72 174 2 +298.62 ± 40.29
448162 ncm-dbt-05 591383 500 220 52 228 +121.45 ± 13.84 0 7 74 163 6 +268.17 ± 39.97
448161 ncm-dbt-02 585000 500 221 34 245 +136.56 ± 11.33 0 0 65 183 2 +330.23 ± 42.3

Commit

Commit ID 28844fc6975b002150190464914e5b340a2c9209
Author Joost VandeVondele
Date 2026-01-01 15:17:38 UTC
Update of the year Happy New Year! closes https://github.com/official-stockfish/Stockfish/pull/6514 No functional change
Copyright 2011–2026 Next Chess Move LLC