Dev Builds » 20260101-1504

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 06:45:14 581610 3994 1728 373 1893 +122.73 ± 4.57 1 31 606 1330 29 +278.23 ± 13.8
ncm-dbt-02 06:46:13 585866 4004 1739 397 1868 +121.13 ± 4.68 0 44 605 1320 33 +271.69 ± 13.84
ncm-dbt-03 06:44:57 585762 4000 1760 391 1849 +123.91 ± 4.63 0 31 610 1318 41 +277.93 ± 13.75
ncm-dbt-04 06:44:56 566843 4004 1743 372 1889 +123.97 ± 4.54 2 28 596 1349 27 +283.15 ± 13.91
ncm-dbt-05 06:46:54 583538 3998 1743 372 1883 +124.17 ± 4.64 0 38 587 1339 35 +280.63 ± 14.04
20000 8713 1905 9382 +123.18 ± 2.06 3 172 3004 6656 165 +278.3 ± 6.2

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
448417 ncm-dbt-02 587113 4 2 0 2 +190.27 ± 27.79 0 0 0 2 0 +1199.83 ± 312.71
448416 ncm-dbt-04 567601 4 2 1 1 +88.51 ± 137.63 0 0 1 1 0 +190.5 ± 634.21
448415 ncm-dbt-01 582068 494 207 42 245 +120.67 ± 13.78 0 7 73 162 5 +268.03 ± 40.25
448414 ncm-dbt-05 581361 498 219 47 232 +125.14 ± 13.29 0 6 69 170 4 +284.66 ± 41.44
448413 ncm-dbt-04 566138 500 216 44 240 +124.6 ± 12.9 0 5 71 171 3 +285.49 ± 40.81
448412 ncm-dbt-02 585717 500 214 52 234 +116.77 ± 13.54 0 7 78 161 4 +258.75 ± 38.88
448411 ncm-dbt-03 585379 500 224 53 223 +123.81 ± 13.28 0 6 71 169 4 +280.42 ± 40.83
448410 ncm-dbt-01 581777 500 207 46 247 +116.0 ± 13.02 0 6 79 163 2 +261.07 ± 38.58
448409 ncm-dbt-05 581693 500 212 44 244 +121.45 ± 13.14 0 5 76 165 4 +273.0 ± 39.35
448408 ncm-dbt-04 565312 500 219 38 243 +131.74 ± 12.93 0 4 66 175 5 +304.07 ± 42.38
448407 ncm-dbt-02 584916 500 216 49 235 +120.67 ± 12.6 0 4 77 167 2 +275.45 ± 39.01
448406 ncm-dbt-03 585084 500 221 43 236 +129.35 ± 13.36 0 4 71 168 7 +290.66 ± 40.76
448405 ncm-dbt-01 584537 500 217 47 236 +123.02 ± 12.17 0 3 75 171 1 +285.49 ± 39.5
448404 ncm-dbt-05 581485 500 223 47 230 +127.76 ± 12.26 0 4 67 178 1 +301.33 ± 42.04
448403 ncm-dbt-02 587282 500 216 41 243 +126.97 ± 12.47 0 1 78 166 5 +288.06 ± 38.42
448402 ncm-dbt-04 567047 500 211 46 243 +119.11 ± 12.05 0 2 82 165 1 +273.0 ± 37.5
448401 ncm-dbt-03 588686 500 219 50 231 +122.24 ± 12.76 0 4 76 167 3 +277.93 ± 39.29
448400 ncm-dbt-01 583363 500 226 51 223 +126.97 ± 13.58 0 6 69 169 6 +285.49 ± 41.44
448399 ncm-dbt-05 583572 500 220 49 231 +123.81 ± 13.46 0 5 75 164 6 +275.45 ± 39.63
448398 ncm-dbt-02 584579 500 211 46 243 +119.11 ± 13.17 0 4 82 159 5 +263.42 ± 37.69
448397 ncm-dbt-04 568236 500 213 48 239 +119.11 ± 12.99 1 1 84 160 4 +268.17 ± 36.99
448396 ncm-dbt-03 585548 500 218 54 228 +118.33 ± 14.03 0 5 85 151 9 +251.89 ± 37.03
448395 ncm-dbt-01 579289 500 218 56 226 +116.77 ± 12.47 0 2 87 158 3 +261.07 ± 36.27
448394 ncm-dbt-04 568236 500 234 44 222 +138.99 ± 12.09 0 2 60 184 4 +333.32 ± 44.47
448393 ncm-dbt-05 580904 500 217 40 243 +128.55 ± 13.56 0 5 70 168 7 +288.06 ± 41.11
448392 ncm-dbt-02 582987 500 225 56 219 +122.24 ± 12.57 0 3 78 166 3 +277.93 ± 38.66
448391 ncm-dbt-03 585169 500 214 64 222 +107.54 ± 13.4 0 5 95 145 5 +230.16 ± 34.79
448390 ncm-dbt-01 580365 500 221 46 233 +126.97 ± 12.08 0 1 76 170 3 +293.29 ± 38.98
448389 ncm-dbt-04 564291 500 221 47 232 +126.17 ± 12.49 0 3 73 171 3 +290.66 ± 40.08
448388 ncm-dbt-02 586223 500 221 46 233 +126.97 ± 13.76 0 7 67 170 6 +285.49 ± 42.08
448387 ncm-dbt-05 583112 500 212 52 236 +115.22 ± 12.85 0 5 82 161 2 +258.75 ± 37.76
448386 ncm-dbt-03 586858 500 224 43 233 +131.74 ± 12.93 0 4 66 175 5 +304.07 ± 42.38
448385 ncm-dbt-04 567839 500 207 54 239 +109.83 ± 14.05 1 7 84 154 4 +240.82 ± 37.4
448384 ncm-dbt-01 579248 500 214 38 248 +127.76 ± 12.65 0 1 78 165 6 +288.06 ± 38.42
448383 ncm-dbt-05 583028 500 229 52 219 +128.55 ± 13.38 0 4 72 167 7 +288.06 ± 40.46
448382 ncm-dbt-03 585928 500 225 47 228 +129.35 ± 12.61 0 1 76 167 6 +293.29 ± 38.98
448381 ncm-dbt-02 585464 500 219 45 236 +126.17 ± 13.42 0 8 63 176 3 +290.66 ± 43.37
448380 ncm-dbt-01 582235 500 218 47 235 +123.81 ± 13.46 1 5 69 172 3 +285.49 ± 41.44
448379 ncm-dbt-04 566888 500 220 50 230 +123.02 ± 12.74 0 4 75 168 3 +280.42 ± 39.57
448378 ncm-dbt-05 593152 500 211 41 248 +123.02 ± 12.93 0 4 76 166 4 +277.93 ± 39.29
448377 ncm-dbt-03 583447 500 215 37 248 +129.35 ± 12.01 0 2 70 176 2 +304.07 ± 40.91
448376 ncm-dbt-02 588515 500 215 62 223 +109.83 ± 14.22 0 10 82 153 5 +236.51 ± 37.9

Commit

Commit ID aeb3bf33a9bbf6dd662e9e570accf56c57eafbd7
Author anematode
Date 2026-01-01 15:04:43 UTC
port get_changed_pieces to ARM NEON passed STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 71968 W: 18833 L: 18489 D: 34646 Ptnml(0-2): 192, 7310, 20643, 7640, 199 https://tests.stockfishchess.org/tests/view/69509e5c572093c1986d7a0a closes https://github.com/official-stockfish/Stockfish/pull/6512 No functional change
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