Dev Builds » 20251114-1643

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 06:47:40 581785 4008 1688 421 1899 +113.73 ± 4.72 2 46 666 1263 27 +251.76 ± 13.17
ncm-dbt-02 06:46:06 586490 3998 1673 436 1889 +111.14 ± 4.61 0 36 718 1217 28 +243.44 ± 12.61
ncm-dbt-03 06:46:53 585317 4020 1715 444 1861 +113.75 ± 4.61 1 35 694 1252 28 +251.28 ± 12.84
ncm-dbt-04 06:44:37 566618 4000 1692 423 1885 +114.16 ± 4.79 2 51 654 1262 31 +251.89 ± 13.3
ncm-dbt-05 06:44:34 582759 3974 1699 407 1868 +117.21 ± 4.69 0 41 645 1269 32 +259.98 ± 13.37
20000 8467 2131 9402 +113.99 ± 2.09 5 209 3377 6263 146 +251.61 ± 5.83

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
440868 ncm-dbt-01 580987 8 4 0 4 +190.56 ± 13.88 0 0 0 4 0 +1199.83 ± 250.99
440867 ncm-dbt-03 583782 20 8 3 9 +88.69 ± 58.16 0 0 5 5 0 +190.78 ± 162.33
440866 ncm-dbt-05 579372 474 197 46 231 +114.67 ± 14.74 0 10 71 151 5 +249.66 ± 40.78
440865 ncm-dbt-02 586266 498 206 49 243 +113.39 ± 12.34 0 3 87 158 1 +255.59 ± 36.38
440864 ncm-dbt-04 564487 500 207 52 241 +111.37 ± 13.05 0 6 85 157 2 +247.41 ± 37.09
440863 ncm-dbt-01 582277 500 218 52 230 +119.89 ± 12.79 0 4 79 164 3 +270.57 ± 38.47
440862 ncm-dbt-03 583070 500 227 65 208 +116.77 ± 13.19 0 6 79 162 3 +261.07 ± 38.58
440861 ncm-dbt-05 580240 500 219 55 226 +118.33 ± 12.81 0 4 81 162 3 +265.78 ± 37.95
440860 ncm-dbt-02 586689 500 205 49 246 +112.14 ± 12.87 0 2 95 148 5 +243.0 ± 34.49
440859 ncm-dbt-04 566809 500 213 42 245 +123.81 ± 13.81 0 6 74 163 7 +273.0 ± 39.95
440858 ncm-dbt-03 585000 500 208 44 248 +118.33 ± 13.86 0 5 84 153 8 +254.16 ± 37.27
440857 ncm-dbt-01 579868 500 212 41 247 +123.81 ± 13.28 0 7 68 172 3 +282.94 ± 41.76
440856 ncm-dbt-05 582778 500 220 47 233 +125.38 ± 12.32 0 1 79 166 4 +285.49 ± 38.15
440855 ncm-dbt-02 585548 500 210 61 229 +106.77 ± 13.56 0 4 100 139 7 +223.94 ± 33.69
440854 ncm-dbt-04 566178 500 206 49 245 +112.91 ± 13.39 0 5 88 152 5 +245.2 ± 36.32
440853 ncm-dbt-03 587749 500 214 64 222 +107.54 ± 14.05 1 5 93 145 6 +230.16 ± 35.29
440852 ncm-dbt-01 585337 500 209 67 224 +101.46 ± 14.32 0 10 94 140 6 +211.87 ± 35.26
440851 ncm-dbt-05 577930 500 214 50 236 +118.33 ± 12.81 0 6 75 168 1 +270.57 ± 39.67
440850 ncm-dbt-02 585717 500 219 55 226 +118.33 ± 12.81 0 4 81 162 3 +265.78 ± 37.95
440849 ncm-dbt-04 566178 500 221 54 225 +120.67 ± 12.22 0 2 81 165 2 +275.45 ± 37.75
440848 ncm-dbt-03 583950 500 213 55 232 +113.68 ± 11.93 0 1 91 157 1 +256.44 ± 35.22
440847 ncm-dbt-01 580323 500 213 54 233 +114.45 ± 13.38 0 5 86 154 5 +249.64 ± 36.79
440846 ncm-dbt-05 578218 500 218 60 222 +113.68 ± 13.72 0 4 92 146 8 +240.82 ± 35.35
440845 ncm-dbt-04 566572 500 212 61 227 +108.3 ± 13.23 0 6 90 151 3 +236.51 ± 35.94
440844 ncm-dbt-02 584958 500 204 60 236 +102.97 ± 12.53 0 5 96 149 0 +228.08 ± 34.59
440843 ncm-dbt-03 586816 500 216 51 233 +119.11 ± 12.62 0 3 82 162 3 +268.17 ± 37.61
440842 ncm-dbt-01 580821 500 209 62 229 +105.25 ± 13.05 0 6 93 149 2 +230.16 ± 35.29
440841 ncm-dbt-05 584243 500 213 57 230 +112.14 ± 13.04 0 4 90 152 4 +245.2 ± 35.79
440840 ncm-dbt-04 566888 500 206 50 244 +112.14 ± 13.56 0 6 87 152 5 +243.0 ± 36.62
440839 ncm-dbt-02 587113 500 211 67 222 +102.97 ± 14.02 0 10 90 146 4 +219.87 ± 36.1
440838 ncm-dbt-03 585674 500 216 62 222 +110.6 ± 12.88 0 5 88 155 2 +245.2 ± 36.32
440837 ncm-dbt-01 581818 500 209 45 246 +118.33 ± 13.17 1 3 80 163 3 +268.17 ± 38.21
440836 ncm-dbt-05 581735 500 196 43 261 +109.83 ± 13.23 0 7 85 156 2 +243.0 ± 37.13
440835 ncm-dbt-04 568514 500 212 64 224 +106.01 ± 15.12 2 10 81 152 5 +230.16 ± 38.13
440834 ncm-dbt-02 589112 500 202 46 252 +112.14 ± 13.04 0 3 93 149 5 +243.0 ± 35.03
440833 ncm-dbt-03 586223 500 207 47 246 +115.22 ± 13.03 0 4 86 156 4 +254.16 ± 36.71
440832 ncm-dbt-01 581153 500 208 47 245 +116.0 ± 14.04 1 8 73 165 3 +261.07 ± 40.24
440831 ncm-dbt-05 597556 500 222 49 229 +125.38 ± 13.25 0 5 72 168 5 +282.94 ± 40.5
440830 ncm-dbt-04 567324 500 215 51 234 +118.33 ± 13.7 0 10 68 170 2 +268.17 ± 41.66
440829 ncm-dbt-02 586520 500 216 49 235 +120.67 ± 12.97 0 5 76 166 3 +273.0 ± 39.35
440828 ncm-dbt-03 585590 500 206 53 241 +109.83 ± 12.88 0 6 86 157 1 +245.2 ± 36.85
440827 ncm-dbt-01 583489 500 206 53 241 +109.83 ± 12.52 0 3 93 152 2 +243.0 ± 35.03

Commit

Commit ID 1d504b927fde7c3227a0c32f26fd49810c0fcd55
Author Shawn Xu
Date 2025-11-14 16:43:44 UTC
Fix undefined behavior C++ standard does not define `uint8_t` as an allowed pointer alias type. Despite `uint8_t` being `unsigned char` on most platforms, this is not enforced by the standard. https://eel.is/c++draft/basic.lval#11 https://stackoverflow.com/a/16138470 closes https://github.com/official-stockfish/Stockfish/pull/6420 No functional change
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