Dev Builds » 20260204-1632

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 06:44:26 582401 4014 1746 390 1878 +122.17 ± 4.49 0 28 622 1330 27 +276.8 ± 13.59
ncm-dbt-02 06:44:12 585804 3996 1715 365 1916 +122.18 ± 4.73 0 48 587 1328 35 +274.32 ± 14.06
ncm-dbt-03 06:44:50 585102 3998 1689 371 1938 +118.98 ± 4.62 1 40 623 1310 25 +267.76 ± 13.62
ncm-dbt-04 06:44:42 565476 3998 1758 366 1874 +126.25 ± 4.57 0 32 577 1356 34 +287.64 ± 14.16
ncm-dbt-05 06:45:22 581753 3994 1720 406 1868 +118.72 ± 4.59 1 32 644 1292 28 +266.06 ± 13.36
20000 8628 1898 9474 +121.65 ± 2.06 2 180 3053 6616 149 +274.41 ± 6.15

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
453976 ncm-dbt-01 583028 14 7 3 4 +102.04 ± 70.73 0 0 3 4 0 +225.59 ± 263.0
453975 ncm-dbt-02 585042 496 224 39 233 +136.15 ± 12.26 0 1 66 176 5 +319.57 ± 42.11
453974 ncm-dbt-03 583112 498 209 46 243 +118.06 ± 13.56 0 7 76 162 4 +262.57 ± 39.41
453973 ncm-dbt-04 566533 498 216 46 236 +123.56 ± 13.85 0 6 74 162 7 +272.16 ± 39.95
453972 ncm-dbt-05 582694 494 213 46 235 +122.26 ± 13.04 0 5 73 166 3 +277.91 ± 40.2
453971 ncm-dbt-01 582110 500 217 50 233 +120.67 ± 14.01 0 8 73 163 6 +265.78 ± 40.25
453970 ncm-dbt-03 585506 500 216 45 239 +123.81 ± 12.73 0 3 77 166 4 +280.42 ± 38.93
453969 ncm-dbt-02 585548 500 214 45 241 +122.24 ± 13.48 0 5 77 162 6 +270.57 ± 39.07
453968 ncm-dbt-05 582485 500 212 52 236 +115.22 ± 13.72 0 5 87 151 7 +247.41 ± 36.56
453967 ncm-dbt-04 565312 500 215 53 232 +116.77 ± 13.71 0 7 79 159 5 +256.44 ± 38.62
453966 ncm-dbt-01 579372 500 219 50 231 +122.24 ± 13.83 0 5 79 158 8 +265.78 ± 38.54
453965 ncm-dbt-03 585126 500 205 50 245 +111.37 ± 13.05 0 6 85 157 2 +247.41 ± 37.09
453964 ncm-dbt-02 586646 500 217 40 243 +128.55 ± 12.24 0 2 72 173 3 +298.62 ± 40.29
453963 ncm-dbt-04 567284 500 222 44 234 +129.35 ± 12.41 0 3 69 175 3 +301.33 ± 41.33
453962 ncm-dbt-05 582903 500 216 54 230 +116.77 ± 12.28 0 2 86 160 2 +263.42 ± 36.51
453961 ncm-dbt-01 584622 500 218 46 236 +124.6 ± 13.09 0 3 78 163 6 +277.93 ± 38.66
453960 ncm-dbt-03 585506 500 215 52 233 +117.55 ± 12.27 0 3 82 164 1 +268.17 ± 37.61
453959 ncm-dbt-02 587155 500 200 55 245 +103.73 ± 14.8 0 15 79 152 4 +221.9 ± 38.51
453958 ncm-dbt-04 560904 500 216 50 234 +119.89 ± 12.61 0 4 78 166 2 +273.0 ± 38.74
453957 ncm-dbt-05 582569 500 219 46 235 +125.39 ± 13.25 1 4 69 173 3 +290.66 ± 41.43
453956 ncm-dbt-01 582694 500 221 44 235 +128.55 ± 11.41 0 0 74 175 1 +304.07 ± 39.39
453955 ncm-dbt-03 587792 500 204 43 253 +116.0 ± 12.1 0 2 86 161 1 +263.42 ± 36.51
453954 ncm-dbt-01 583237 500 213 45 242 +121.45 ± 12.4 0 3 78 167 2 +277.93 ± 38.66
453953 ncm-dbt-04 567126 500 220 40 240 +130.94 ± 12.76 0 3 69 173 5 +301.33 ± 41.33
453952 ncm-dbt-02 586012 500 216 35 249 +131.74 ± 12.74 0 5 62 180 3 +309.64 ± 43.82
453951 ncm-dbt-05 582193 500 213 57 230 +112.14 ± 13.04 0 5 87 155 3 +247.41 ± 36.56
453950 ncm-dbt-03 584201 500 209 47 244 +116.78 ± 13.87 1 7 74 165 3 +263.42 ± 39.97
453949 ncm-dbt-01 581361 500 224 51 225 +125.38 ± 12.32 0 3 73 172 2 +290.66 ± 40.08
453948 ncm-dbt-04 564017 500 222 52 226 +123.02 ± 12.56 0 5 71 173 1 +285.49 ± 40.81
453947 ncm-dbt-05 581652 500 218 53 229 +119.11 ± 12.05 0 1 85 162 2 +270.57 ± 36.61
453946 ncm-dbt-02 582694 500 214 52 234 +116.77 ± 13.71 0 9 73 165 3 +261.07 ± 40.24
453945 ncm-dbt-02 586350 500 216 50 234 +119.89 ± 13.33 0 6 76 164 4 +268.17 ± 39.39
453944 ncm-dbt-03 584664 500 214 34 252 +130.94 ± 12.95 0 5 64 177 4 +304.07 ± 43.1
453943 ncm-dbt-04 565272 500 228 47 225 +131.74 ± 12.74 0 2 71 171 6 +301.33 ± 40.6
453942 ncm-dbt-01 578753 500 206 44 250 +116.77 ± 12.65 0 4 82 162 2 +263.42 ± 37.69
453941 ncm-dbt-05 580033 500 217 53 230 +118.33 ± 13.86 0 7 78 159 6 +258.75 ± 38.88
453940 ncm-dbt-02 586985 500 214 49 237 +119.11 ± 13.69 0 5 82 156 7 +258.75 ± 37.76
453939 ncm-dbt-04 567363 500 219 34 247 +134.95 ± 12.44 0 2 66 177 5 +315.35 ± 42.24
453938 ncm-dbt-01 586435 500 221 57 222 +118.33 ± 11.87 0 2 82 166 0 +273.0 ± 37.5
453937 ncm-dbt-03 584916 500 217 54 229 +117.55 ± 13.87 0 7 79 158 6 +256.44 ± 38.62
453936 ncm-dbt-05 579496 500 212 45 243 +120.67 ± 12.41 0 3 79 166 2 +275.45 ± 38.39

Commit

Commit ID 0d26c61ff2ce27d7af7cdf4c805bde1a032ae435
Author anematode
Date 2026-02-04 16:32:48 UTC
fix return type of vmovl_high_s8 also add -flax-vector-conversions=none to the build closes https://github.com/official-stockfish/Stockfish/pull/6587 No functional change
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