Dev Builds » 20251130-2041

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 06:47:17 581304 4000 1699 421 1880 +115.03 ± 4.72 0 54 639 1282 25 +255.59 ± 13.47
ncm-dbt-02 06:47:36 586187 4012 1696 415 1901 +114.95 ± 4.76 3 48 649 1277 29 +255.08 ± 13.35
ncm-dbt-03 06:47:12 585754 4000 1717 409 1874 +117.94 ± 4.63 0 41 638 1293 28 +263.42 ± 13.45
ncm-dbt-04 06:47:12 566562 4004 1686 411 1907 +114.62 ± 4.69 1 47 656 1272 26 +254.37 ± 13.27
ncm-dbt-05 06:48:03 581444 3984 1708 363 1913 +122.08 ± 4.67 1 38 601 1319 33 +274.92 ± 13.87
20000 8506 2019 9475 +116.91 ± 2.1 5 228 3183 6443 141 +260.55 ± 6.02

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
443844 ncm-dbt-04 563744 4 2 1 1 +88.51 ± 137.63 0 0 1 1 0 +190.5 ± 634.21
443843 ncm-dbt-02 586266 12 5 0 7 +154.02 ± 64.21 0 0 1 5 0 +416.21 ± 496.36
443842 ncm-dbt-05 584034 484 213 43 228 +127.46 ± 13.3 0 4 69 164 5 +289.24 ± 41.36
443841 ncm-dbt-01 581485 500 220 55 225 +119.11 ± 12.62 0 4 79 165 2 +270.57 ± 38.47
443840 ncm-dbt-03 585464 500 217 48 235 +122.24 ± 12.38 0 3 77 168 2 +280.42 ± 38.93
443839 ncm-dbt-04 564213 500 213 49 238 +118.33 ± 12.81 0 4 81 162 3 +265.78 ± 37.95
443838 ncm-dbt-02 585548 500 202 52 246 +107.54 ± 14.21 0 11 82 153 4 +232.26 ± 37.9
443837 ncm-dbt-05 583824 500 220 39 241 +131.74 ± 12.54 0 2 70 173 5 +304.07 ± 40.91
443836 ncm-dbt-01 582778 500 217 46 237 +123.81 ± 12.54 0 4 73 171 2 +285.49 ± 40.16
443835 ncm-dbt-03 582068 500 215 53 232 +116.77 ± 13.88 0 6 83 154 7 +251.89 ± 37.57
443834 ncm-dbt-02 586774 500 215 59 226 +112.14 ± 13.73 1 5 85 155 4 +247.41 ± 37.09
443833 ncm-dbt-04 570148 500 207 47 246 +115.22 ± 12.85 0 3 88 155 4 +254.16 ± 36.15
443832 ncm-dbt-05 581485 500 215 35 250 +130.94 ± 12.56 0 4 65 178 3 +306.84 ± 42.73
443831 ncm-dbt-01 580323 500 214 44 242 +123.02 ± 12.93 0 5 73 169 3 +280.42 ± 40.21
443830 ncm-dbt-03 584243 500 209 53 238 +112.14 ± 13.56 0 8 81 158 3 +247.41 ± 38.13
443829 ncm-dbt-02 587070 500 208 50 242 +113.68 ± 13.72 0 10 74 164 2 +254.16 ± 39.94
443828 ncm-dbt-04 564252 500 207 47 246 +115.23 ± 13.88 1 8 73 166 2 +261.07 ± 40.24
443827 ncm-dbt-05 577561 500 212 57 231 +111.37 ± 13.56 0 6 88 151 5 +240.82 ± 36.39
443826 ncm-dbt-01 581485 500 209 53 238 +112.14 ± 12.87 0 5 86 157 2 +249.64 ± 36.79
443825 ncm-dbt-03 588004 500 213 52 235 +116.0 ± 13.2 0 6 80 161 3 +258.75 ± 38.32
443824 ncm-dbt-02 586308 500 215 45 240 +123.02 ± 12.74 0 3 78 165 4 +277.93 ± 38.66
443823 ncm-dbt-04 570749 500 210 55 235 +111.37 ± 13.56 0 6 88 151 5 +240.82 ± 36.39
443822 ncm-dbt-05 579909 500 215 47 238 +121.45 ± 13.14 0 3 82 159 6 +268.17 ± 37.61
443821 ncm-dbt-01 577151 500 209 53 238 +112.14 ± 14.22 0 11 76 159 4 +245.2 ± 39.38
443820 ncm-dbt-03 585970 500 210 52 238 +113.68 ± 12.68 0 4 86 158 2 +254.16 ± 36.71
443819 ncm-dbt-04 568633 500 213 57 230 +112.14 ± 13.04 0 5 87 155 3 +247.41 ± 36.56
443818 ncm-dbt-02 586562 500 211 54 235 +112.91 ± 13.73 0 6 87 151 6 +243.0 ± 36.62
443817 ncm-dbt-03 586012 500 222 51 227 +123.81 ± 12.35 0 1 81 164 4 +280.42 ± 37.62
443816 ncm-dbt-05 577930 500 208 45 247 +117.55 ± 13.18 1 5 75 168 1 +270.57 ± 39.67
443815 ncm-dbt-01 583656 500 203 53 244 +107.54 ± 13.56 0 6 93 146 5 +230.16 ± 35.29
443814 ncm-dbt-04 564370 500 210 58 232 +109.07 ± 13.89 0 11 78 159 2 +240.82 ± 38.87
443813 ncm-dbt-02 587240 500 216 63 221 +109.83 ± 12.88 1 2 92 153 2 +245.2 ± 35.25
443812 ncm-dbt-03 585928 500 215 53 232 +116.77 ± 13.36 0 6 80 160 4 +258.75 ± 38.32
443811 ncm-dbt-04 565823 500 200 54 246 +104.49 ± 12.88 0 6 93 150 1 +230.16 ± 35.29
443810 ncm-dbt-02 583656 500 217 53 230 +118.33 ± 14.52 1 7 76 159 7 +258.75 ± 39.42
443809 ncm-dbt-01 581985 500 210 64 226 +104.49 ± 14.35 0 13 81 153 3 +226.0 ± 38.11
443808 ncm-dbt-05 582652 500 212 48 240 +118.33 ± 13.52 0 6 79 160 5 +261.07 ± 38.58
443807 ncm-dbt-04 567126 500 224 43 233 +131.74 ± 13.12 0 4 67 173 6 +301.33 ± 42.04
443806 ncm-dbt-03 588345 500 216 47 237 +122.24 ± 13.3 0 7 70 170 3 +277.93 ± 41.14
443805 ncm-dbt-01 581569 500 217 53 230 +118.33 ± 13.35 0 6 78 162 4 +263.42 ± 38.85
443804 ncm-dbt-05 584159 500 213 49 238 +118.33 ± 13.52 0 8 73 166 3 +265.78 ± 40.25
443803 ncm-dbt-02 586266 500 207 39 254 +121.45 ± 12.2 0 4 74 172 0 +282.94 ± 39.86

Commit

Commit ID 1132d893e09d6dae78a452b841375545aca9e03e
Author Shawn Xu
Date 2025-11-30 20:41:51 UTC
Simplify Accumulator Updates Passed Non-regression STC: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 146848 W: 37915 L: 37820 D: 71113 Ptnml(0-2): 415, 16159, 40186, 16244, 420 https://tests.stockfishchess.org/tests/view/691772217ca878185233202b closes https://github.com/official-stockfish/Stockfish/pull/6421 No functional change
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