Dev Builds » 20260213-0606

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 06:43:49 581588 4000 1708 371 1921 +120.77 ± 4.65 0 44 604 1323 29 +271.78 ± 13.85
ncm-dbt-02 06:44:36 586447 4008 1759 353 1896 +127.28 ± 4.49 0 27 576 1369 32 +291.73 ± 14.15
ncm-dbt-03 06:45:08 584972 4000 1731 396 1873 +120.57 ± 4.55 0 34 623 1317 26 +272.09 ± 13.6
ncm-dbt-04 06:43:57 566732 4000 1730 368 1902 +123.22 ± 4.48 0 23 622 1325 30 +279.17 ± 13.57
ncm-dbt-05 06:44:59 583856 3992 1695 396 1901 +117.32 ± 4.65 0 49 620 1306 21 +263.58 ± 13.67
20000 8623 1884 9493 +121.83 ± 2.04 0 177 3045 6640 138 +275.51 ± 6.15

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
454957 ncm-dbt-02 585506 8 4 2 2 +88.62 ± 93.84 0 0 2 2 0 +190.67 ± 458.56
454956 ncm-dbt-05 583740 492 211 42 239 +124.4 ± 11.63 0 1 75 170 0 +292.62 ± 39.24
454955 ncm-dbt-03 583196 500 216 44 240 +124.6 ± 12.71 0 4 73 170 3 +285.49 ± 40.16
454954 ncm-dbt-04 567442 500 218 41 241 +128.55 ± 12.82 0 4 69 173 4 +295.94 ± 41.39
454953 ncm-dbt-02 586054 500 215 43 242 +124.6 ± 12.53 0 2 78 166 4 +282.94 ± 38.55
454952 ncm-dbt-01 580365 500 213 34 253 +130.14 ± 12.78 0 7 58 184 1 +309.64 ± 45.27
454951 ncm-dbt-05 584369 500 217 56 227 +116.0 ± 13.2 0 5 83 158 4 +256.44 ± 37.51
454950 ncm-dbt-03 583405 500 223 54 223 +122.24 ± 13.3 0 6 73 167 4 +275.45 ± 40.24
454949 ncm-dbt-04 565941 500 225 47 228 +129.35 ± 12.99 0 3 72 169 6 +293.29 ± 40.39
454948 ncm-dbt-02 587792 500 225 47 228 +129.35 ± 13.36 0 5 68 171 6 +293.29 ± 41.75
454947 ncm-dbt-01 582945 500 221 54 225 +120.67 ± 13.5 0 2 88 151 9 +258.75 ± 36.04
454946 ncm-dbt-05 583447 500 203 49 248 +110.6 ± 13.05 0 7 83 159 1 +247.41 ± 37.61
454945 ncm-dbt-04 567522 500 220 50 230 +123.02 ± 12.17 0 3 75 171 1 +285.49 ± 39.5
454944 ncm-dbt-03 585801 500 220 45 235 +126.97 ± 12.47 0 3 72 172 3 +293.29 ± 40.39
454943 ncm-dbt-02 586689 500 221 39 240 +132.54 ± 12.71 0 2 70 172 6 +304.07 ± 40.91
454942 ncm-dbt-01 583656 500 212 50 238 +116.77 ± 13.01 0 7 75 167 1 +265.78 ± 39.69
454941 ncm-dbt-05 577684 500 218 45 237 +125.38 ± 12.32 0 3 73 172 2 +290.66 ± 40.08
454940 ncm-dbt-03 586097 500 212 53 235 +114.45 ± 13.21 0 6 82 159 3 +254.16 ± 37.82
454939 ncm-dbt-04 568474 500 212 42 246 +123.02 ± 12.37 0 1 82 163 4 +277.93 ± 37.36
454938 ncm-dbt-02 588260 500 221 39 240 +132.54 ± 12.12 0 3 64 181 2 +315.35 ± 43.03
454937 ncm-dbt-01 583070 500 214 50 236 +118.33 ± 14.03 0 8 76 160 6 +258.75 ± 39.42
454936 ncm-dbt-05 581361 500 209 50 241 +114.45 ± 14.05 0 10 75 161 4 +251.89 ± 39.67
454935 ncm-dbt-03 584243 500 220 61 219 +114.45 ± 12.49 0 3 87 158 2 +256.44 ± 36.38
454934 ncm-dbt-02 587113 500 221 52 227 +122.24 ± 14.5 0 9 71 162 8 +265.78 ± 40.81
454933 ncm-dbt-04 564880 500 207 51 242 +112.14 ± 12.51 0 3 90 155 2 +249.64 ± 35.69
454932 ncm-dbt-01 580821 500 210 50 240 +115.22 ± 13.2 0 5 84 157 4 +254.16 ± 37.27
454931 ncm-dbt-05 583824 500 207 57 236 +107.54 ± 14.21 0 12 79 156 3 +234.38 ± 38.61
454930 ncm-dbt-02 584159 500 215 41 244 +126.17 ± 11.28 0 0 76 174 0 +298.62 ± 38.82
454929 ncm-dbt-01 578836 500 215 40 245 +126.97 ± 13.22 0 6 67 173 4 +290.66 ± 42.08
454928 ncm-dbt-04 566414 500 223 41 236 +132.54 ± 13.28 0 3 70 169 8 +298.62 ± 41.01
454927 ncm-dbt-03 583866 500 212 49 239 +117.55 ± 13.0 0 3 86 156 5 +258.75 ± 36.62
454926 ncm-dbt-05 583363 500 210 49 241 +116.0 ± 13.02 0 5 82 160 3 +258.75 ± 37.76
454925 ncm-dbt-02 587113 500 227 45 228 +132.54 ± 12.52 0 3 66 177 4 +309.64 ± 42.33
454924 ncm-dbt-04 566060 500 214 47 239 +120.67 ± 12.97 0 4 79 163 4 +270.57 ± 38.47
454923 ncm-dbt-01 582694 500 216 48 236 +121.45 ± 12.77 0 5 74 169 2 +277.93 ± 39.92
454922 ncm-dbt-03 585337 500 211 46 243 +119.11 ± 12.8 0 5 77 166 2 +270.57 ± 39.07
454921 ncm-dbt-05 593066 500 220 48 232 +124.6 ± 13.27 0 6 70 170 4 +282.94 ± 41.13
454920 ncm-dbt-04 567126 500 211 49 240 +116.77 ± 12.09 0 2 85 162 1 +265.78 ± 36.75
454919 ncm-dbt-02 585337 500 210 45 245 +119.11 ± 12.43 0 3 81 164 2 +270.57 ± 37.86
454918 ncm-dbt-01 580323 500 207 45 248 +116.77 ± 12.65 0 4 82 162 2 +263.42 ± 37.69
454917 ncm-dbt-03 587834 500 217 44 239 +125.38 ± 12.89 0 4 73 169 4 +285.49 ± 40.16

Commit

Commit ID b808fd3d55818fc337aa1cd6f3a115c62cd8c230
Author anematode
Date 2026-02-13 06:06:33 UTC
avoid modify_and_replicate for first load We call modify_and_replicate in load_networks, but this is quite inefficient. closes https://github.com/official-stockfish/Stockfish/pull/6574 No functional change
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