Dev Builds » 20250728-1805

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 06:42:09 582570 4000 1681 401 1918 +115.23 ± 4.64 1 45 648 1285 21 +257.59 ± 13.35
ncm-dbt-02 06:44:32 586020 4006 1633 460 1913 +104.8 ± 4.74 0 64 720 1201 18 +228.41 ± 12.66
ncm-dbt-03 06:45:07 583433 3998 1683 454 1861 +110.37 ± 4.66 2 48 684 1249 16 +245.09 ± 12.98
ncm-dbt-04 06:43:10 568813 4000 1641 468 1891 +104.97 ± 4.66 1 51 738 1194 16 +229.64 ± 12.47
ncm-dbt-05 06:45:10 578647 3996 1646 441 1909 +108.13 ± 4.79 1 59 697 1216 25 +236.03 ± 12.87
20000 8284 2224 9492 +108.68 ± 2.1 5 267 3487 6145 96 +239.15 ± 5.75

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
424638 ncm-dbt-02 586774 6 3 1 2 +120.22 ± 109.7 0 0 1 2 0 +279.24 ± 576.89
424637 ncm-dbt-03 584622 498 221 61 216 +115.72 ± 13.05 0 4 85 156 4 +255.59 ± 36.95
424636 ncm-dbt-05 577561 496 200 55 241 +104.62 ± 12.77 0 5 94 148 1 +230.5 ± 34.99
424635 ncm-dbt-01 582360 500 220 56 224 +118.33 ± 13.86 0 9 72 165 4 +263.42 ± 40.52
424634 ncm-dbt-04 568792 500 203 56 241 +105.25 ± 13.39 1 5 92 150 2 +232.26 ± 35.5
424633 ncm-dbt-02 585632 500 196 58 246 +98.44 ± 13.01 0 8 96 146 0 +215.85 ± 34.78
424632 ncm-dbt-05 580862 500 207 62 231 +103.73 ± 13.71 0 10 87 151 2 +226.0 ± 36.75
424631 ncm-dbt-03 583489 500 208 57 235 +108.3 ± 12.35 0 4 91 155 0 +243.0 ± 35.57
424630 ncm-dbt-01 584243 500 207 61 232 +104.49 ± 13.22 0 6 95 146 3 +226.0 ± 34.87
424629 ncm-dbt-04 569709 500 203 58 239 +103.73 ± 14.34 0 12 85 149 4 +221.9 ± 37.21
424628 ncm-dbt-02 586901 500 201 59 240 +101.46 ± 13.53 0 10 89 150 1 +221.9 ± 36.31
424627 ncm-dbt-03 581236 500 215 64 221 +108.3 ± 13.56 0 8 86 153 3 +236.51 ± 36.93
424626 ncm-dbt-01 582318 500 204 48 248 +112.14 ± 13.04 1 4 84 160 1 +254.16 ± 37.27
424625 ncm-dbt-05 579661 500 211 54 235 +112.91 ± 13.22 0 6 84 157 3 +249.64 ± 37.33
424624 ncm-dbt-04 569071 500 219 53 228 +119.89 ± 12.42 0 2 83 162 3 +270.57 ± 37.24
424623 ncm-dbt-02 582987 500 199 51 250 +106.01 ± 13.05 0 7 89 153 1 +234.38 ± 36.22
424622 ncm-dbt-01 582945 500 215 56 229 +114.45 ± 13.21 0 6 82 159 3 +254.16 ± 37.82
424621 ncm-dbt-03 583447 500 201 58 241 +102.22 ± 14.63 0 15 80 152 3 +219.87 ± 38.28
424620 ncm-dbt-05 575639 500 204 52 244 +109.07 ± 13.56 0 7 88 151 4 +236.51 ± 36.44
424619 ncm-dbt-04 567244 500 208 62 230 +104.49 ± 12.35 0 3 99 147 1 +230.16 ± 33.79
424618 ncm-dbt-02 585801 500 204 56 240 +106.01 ± 13.56 0 6 95 144 5 +226.0 ± 34.87
424617 ncm-dbt-01 580862 500 207 46 247 +116.0 ± 13.37 0 7 78 162 3 +258.75 ± 38.88
424616 ncm-dbt-03 585548 500 226 40 234 +135.76 ± 12.21 0 3 61 183 3 +324.17 ± 44.15
424615 ncm-dbt-04 569669 500 205 63 232 +101.46 ± 13.53 0 8 95 144 3 +217.85 ± 34.98
424614 ncm-dbt-05 577192 500 208 59 233 +106.78 ± 14.05 1 9 82 156 2 +236.51 ± 37.9
424613 ncm-dbt-02 588217 500 208 51 241 +112.91 ± 13.73 0 6 87 151 6 +243.0 ± 36.62
424612 ncm-dbt-01 581111 500 214 49 237 +119.11 ± 12.43 0 4 78 167 1 +273.0 ± 38.74
424611 ncm-dbt-03 583572 500 202 60 238 +101.46 ± 12.52 0 4 101 144 1 +221.9 ± 33.5
424610 ncm-dbt-04 568912 500 208 64 228 +102.97 ± 12.87 0 7 92 151 0 +228.08 ± 35.56
424609 ncm-dbt-05 577889 500 206 50 244 +112.14 ± 13.56 0 7 84 155 4 +245.2 ± 37.37
424608 ncm-dbt-02 586477 500 206 73 221 +94.69 ± 13.78 0 11 97 140 2 +202.15 ± 34.7
424607 ncm-dbt-01 584201 500 212 46 242 +119.89 ± 12.98 0 5 77 165 3 +270.57 ± 39.07
424606 ncm-dbt-03 582360 500 204 54 242 +107.54 ± 12.71 0 6 88 156 0 +240.82 ± 36.39
424605 ncm-dbt-05 582611 500 210 58 232 +109.07 ± 13.73 0 7 89 149 5 +234.38 ± 36.22
424604 ncm-dbt-04 568832 500 186 50 264 +96.94 ± 13.0 0 7 101 141 1 +209.91 ± 33.74
424603 ncm-dbt-02 585126 500 204 54 242 +107.54 ± 13.06 0 7 87 155 1 +238.66 ± 36.67
424602 ncm-dbt-01 582527 500 202 39 259 +117.55 ± 12.82 0 4 82 161 3 +263.42 ± 37.69
424601 ncm-dbt-04 568275 500 209 62 229 +105.25 ± 13.22 0 7 91 150 2 +230.16 ± 35.78
424600 ncm-dbt-05 577766 500 200 51 249 +106.77 ± 13.72 0 8 89 149 4 +230.16 ± 36.26
424599 ncm-dbt-02 586266 500 212 57 231 +111.37 ± 13.56 0 9 79 160 2 +247.41 ± 38.64
424598 ncm-dbt-03 583196 500 206 60 234 +104.49 ± 13.71 2 4 92 150 2 +232.26 ± 35.5

Commit

Commit ID 1d8f118c3e8931676f5dbe967e227c7eedcc4449
Author 87
Date 2025-07-28 18:05:26 UTC
Remove unnecessary deque allocation in perft closes https://github.com/official-stockfish/Stockfish/pull/6182 No functional change.
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