Dev Builds » 20250802-1349

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 06:44:19 582816 3998 1629 457 1912 +104.93 ± 4.78 0 69 707 1205 18 +228.75 ± 12.79
ncm-dbt-02 06:44:28 585430 4012 1653 449 1910 +107.58 ± 4.7 1 54 711 1220 20 +235.83 ± 12.73
ncm-dbt-03 06:44:45 584397 4000 1645 413 1942 +110.6 ± 4.73 0 61 665 1255 19 +244.37 ± 13.2
ncm-dbt-04 06:44:34 568524 4006 1680 445 1881 +110.71 ± 4.77 2 56 674 1247 24 +243.88 ± 13.1
ncm-dbt-05 06:44:54 577910 3984 1626 474 1884 +103.41 ± 4.86 4 70 703 1200 15 +226.41 ± 12.84
20000 8233 2238 9529 +107.44 ± 2.13 7 310 3460 6127 96 +235.77 ± 5.78

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
425834 ncm-dbt-02 585928 12 4 4 4 -0.0 ± 81.87 0 1 4 1 0 -0.0 ± 173.65
425833 ncm-dbt-04 568951 6 2 2 2 -0.0 ± 173.92 0 1 1 1 0 -0.0 ± 561.2
425832 ncm-dbt-05 574703 484 199 56 229 +105.81 ± 13.84 1 7 83 150 1 +235.93 ± 37.62
425831 ncm-dbt-01 583992 498 204 57 237 +105.7 ± 14.08 0 12 80 155 2 +231.39 ± 38.36
425830 ncm-dbt-03 583405 500 209 62 229 +105.25 ± 12.35 0 4 95 151 0 +234.38 ± 34.71
425829 ncm-dbt-02 582444 500 202 48 250 +110.6 ± 12.88 0 7 82 161 0 +249.64 ± 37.86
425828 ncm-dbt-04 567482 500 212 54 234 +113.68 ± 12.68 0 5 83 161 1 +256.44 ± 37.51
425827 ncm-dbt-05 581527 500 208 56 236 +109.07 ± 14.37 2 6 84 154 4 +240.82 ± 37.4
425826 ncm-dbt-01 582485 500 198 55 247 +102.22 ± 13.04 0 8 91 151 0 +226.0 ± 35.82
425825 ncm-dbt-03 583070 500 209 55 236 +110.6 ± 13.22 0 8 81 160 1 +247.41 ± 38.13
425824 ncm-dbt-02 587240 500 212 62 226 +107.54 ± 12.71 0 5 91 153 1 +238.66 ± 35.65
425823 ncm-dbt-04 566770 500 197 63 240 +95.44 ± 13.15 0 8 101 140 1 +206.01 ± 33.8
425822 ncm-dbt-05 577643 500 204 66 230 +98.44 ± 14.14 1 10 91 146 2 +213.85 ± 35.9
425821 ncm-dbt-01 584916 500 218 52 230 +119.89 ± 12.61 0 3 81 163 3 +270.57 ± 37.86
425820 ncm-dbt-03 585169 500 196 54 250 +101.46 ± 13.85 0 11 88 149 2 +219.87 ± 36.54
425819 ncm-dbt-02 585464 500 202 60 238 +101.46 ± 13.53 0 8 95 144 3 +217.85 ± 34.98
425818 ncm-dbt-04 567918 500 200 54 246 +104.49 ± 13.88 1 8 87 152 2 +230.16 ± 36.73
425817 ncm-dbt-05 577356 500 197 61 242 +96.94 ± 13.65 0 10 96 142 2 +207.95 ± 34.86
425816 ncm-dbt-01 581777 500 202 49 249 +109.83 ± 13.73 0 7 88 150 5 +236.51 ± 36.44
425815 ncm-dbt-03 585169 500 210 53 237 +112.91 ± 14.05 0 11 74 162 3 +249.64 ± 39.91
425814 ncm-dbt-02 585548 500 200 47 253 +109.83 ± 12.52 0 4 90 155 1 +245.2 ± 35.79
425813 ncm-dbt-04 568355 500 211 54 235 +112.91 ± 13.73 0 9 78 160 3 +249.64 ± 38.9
425812 ncm-dbt-05 581860 500 208 60 232 +106.01 ± 13.72 0 11 81 157 1 +234.38 ± 38.14
425811 ncm-dbt-01 582819 500 217 61 222 +112.14 ± 13.22 0 5 88 153 4 +245.2 ± 36.32
425810 ncm-dbt-03 584622 500 211 52 237 +114.45 ± 13.21 0 7 79 162 2 +256.44 ± 38.62
425809 ncm-dbt-04 568991 500 205 55 240 +107.54 ± 13.56 0 8 87 152 3 +234.38 ± 36.71
425808 ncm-dbt-02 584285 500 205 54 241 +108.3 ± 12.88 0 4 94 149 3 +236.51 ± 34.92
425807 ncm-dbt-05 576987 500 205 56 239 +106.77 ± 12.71 0 5 92 152 1 +236.51 ± 35.43
425806 ncm-dbt-03 586181 500 212 53 235 +114.45 ± 13.55 0 6 84 155 5 +249.64 ± 37.33
425805 ncm-dbt-01 580945 500 188 64 248 +88.0 ± 13.97 0 13 102 133 2 +185.33 ± 33.81
425804 ncm-dbt-02 584034 500 206 61 233 +103.73 ± 13.87 1 7 91 148 3 +226.0 ± 35.82
425803 ncm-dbt-04 569270 500 214 41 245 +125.38 ± 13.61 0 6 71 167 6 +280.42 ± 40.83
425802 ncm-dbt-01 582235 500 201 65 234 +96.94 ± 13.49 0 11 92 147 0 +211.87 ± 35.7
425801 ncm-dbt-02 586646 500 214 58 228 +112.14 ± 13.22 0 5 88 153 4 +245.2 ± 36.32
425800 ncm-dbt-05 578054 500 199 58 243 +100.7 ± 13.36 0 9 92 148 1 +219.87 ± 35.65
425799 ncm-dbt-03 584369 500 189 42 269 +105.25 ± 13.05 0 5 96 146 3 +228.08 ± 34.59
425798 ncm-dbt-04 570909 500 218 57 225 +116.0 ± 13.37 1 4 81 161 3 +261.07 ± 38.02
425797 ncm-dbt-01 583363 500 201 54 245 +105.25 ± 13.72 0 10 85 153 2 +230.16 ± 37.2
425796 ncm-dbt-05 575150 500 206 61 233 +103.73 ± 14.19 0 12 84 151 3 +223.94 ± 37.43
425795 ncm-dbt-02 587282 500 208 55 237 +109.83 ± 14.69 0 13 76 156 5 +236.51 ± 39.32
425794 ncm-dbt-03 583196 500 209 42 249 +120.67 ± 13.67 0 9 68 170 3 +273.0 ± 41.7
425793 ncm-dbt-04 568077 500 221 65 214 +112.14 ± 13.73 0 7 85 153 5 +243.0 ± 37.13

Commit

Commit ID 83071917e903581542670a87a036f5d02e13fb82
Author mstembera
Date 2025-08-02 13:49:35 UTC
Optimize find_nnz() using VBMI2 about a 0.7% speedup for the x86-64-avx512icl ARCH closes https://github.com/official-stockfish/Stockfish/pull/6186 No functional change
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