Dev Builds » 20250724-0813

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 06:44:01 583894 3994 1612 465 1917 +102.66 ± 4.73 1 61 741 1178 16 +223.36 ± 12.46
ncm-dbt-02 06:45:10 585831 4014 1630 454 1930 +104.86 ± 4.76 1 67 710 1213 16 +229.37 ± 12.76
ncm-dbt-03 06:44:32 584394 4008 1650 479 1879 +104.55 ± 4.78 1 65 719 1200 19 +227.74 ± 12.68
ncm-dbt-04 06:43:12 569032 4000 1649 478 1873 +104.78 ± 4.82 0 67 720 1188 25 +226.52 ± 12.67
ncm-dbt-05 06:45:42 581057 3984 1584 457 1943 +101.04 ± 4.73 0 63 756 1156 17 +218.47 ± 12.33
20000 8125 2333 9542 +103.58 ± 2.13 3 323 3646 5935 93 +225.08 ± 5.62

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
424107 ncm-dbt-03 585506 8 3 2 3 +43.58 ± 76.58 0 0 3 1 0 +88.62 ± 172.94
424106 ncm-dbt-02 586308 14 7 1 6 +159.07 ± 56.3 0 0 1 6 0 +445.23 ± 480.27
424105 ncm-dbt-01 583196 494 199 61 234 +99.7 ± 13.62 0 10 90 146 1 +217.18 ± 36.09
424104 ncm-dbt-05 578630 484 186 52 246 +98.77 ± 13.27 0 5 101 133 3 +210.55 ± 33.52
424103 ncm-dbt-04 569071 500 205 57 238 +106.01 ± 14.2 0 11 84 151 4 +228.08 ± 37.44
424102 ncm-dbt-03 585295 500 205 57 238 +106.01 ± 13.22 0 7 90 151 2 +232.26 ± 35.99
424101 ncm-dbt-02 586223 500 196 58 246 +98.44 ± 14.14 0 12 91 144 3 +209.91 ± 35.92
424100 ncm-dbt-01 585042 500 212 64 224 +106.01 ± 12.88 0 4 97 146 3 +230.16 ± 34.29
424099 ncm-dbt-05 583489 500 194 56 250 +98.44 ± 12.67 0 6 100 144 0 +215.85 ± 33.86
424098 ncm-dbt-03 583656 500 206 66 228 +99.95 ± 13.36 0 7 99 141 3 +213.85 ± 34.13
424097 ncm-dbt-04 568554 500 216 52 232 +118.33 ± 13.86 0 7 78 159 6 +258.75 ± 38.88
424096 ncm-dbt-02 583950 500 204 62 234 +101.46 ± 13.37 0 10 88 152 0 +223.94 ± 36.53
424095 ncm-dbt-01 583614 500 206 62 232 +102.97 ± 12.53 0 4 99 146 1 +226.0 ± 33.89
424094 ncm-dbt-05 581028 500 198 61 241 +97.69 ± 13.5 0 8 100 139 3 +207.95 ± 33.99
424093 ncm-dbt-04 568474 500 203 65 232 +98.44 ± 13.67 0 10 94 144 2 +211.87 ± 35.26
424092 ncm-dbt-02 587962 500 204 55 241 +106.78 ± 13.56 1 7 85 156 1 +238.66 ± 37.17
424091 ncm-dbt-03 583992 500 214 71 215 +102.22 ± 15.08 0 15 83 146 6 +213.85 ± 37.6
424090 ncm-dbt-01 581860 500 184 64 252 +85.04 ± 14.05 1 11 107 129 2 +179.9 ± 32.89
424089 ncm-dbt-05 579124 500 199 49 252 +107.54 ± 12.17 0 2 97 150 1 +238.66 ± 34.07
424088 ncm-dbt-03 585169 500 201 65 234 +96.94 ± 13.81 1 8 97 142 2 +209.91 ± 34.63
424087 ncm-dbt-04 568713 500 199 69 232 +92.45 ± 13.27 0 8 106 134 2 +196.45 ± 32.87
424086 ncm-dbt-02 586181 500 199 57 244 +101.46 ± 13.37 0 10 88 152 0 +223.94 ± 36.53
424085 ncm-dbt-01 584874 500 202 56 242 +104.49 ± 14.04 0 13 79 157 1 +230.16 ± 38.58
424084 ncm-dbt-05 582903 500 205 57 238 +106.01 ± 13.72 0 10 84 154 2 +232.26 ± 37.43
424083 ncm-dbt-03 585464 500 213 57 230 +112.14 ± 12.14 0 2 91 156 1 +251.89 ± 35.35
424082 ncm-dbt-04 569749 500 208 59 233 +106.77 ± 13.89 0 10 84 153 3 +232.26 ± 37.43
424081 ncm-dbt-02 585801 500 208 55 237 +109.83 ± 13.56 0 10 78 161 1 +245.2 ± 38.89
424080 ncm-dbt-01 583112 500 205 53 242 +109.07 ± 12.34 0 2 96 150 2 +240.82 ± 34.28
424079 ncm-dbt-04 568116 500 206 55 239 +108.3 ± 12.88 0 5 91 152 2 +238.66 ± 35.65
424078 ncm-dbt-05 578383 500 194 64 242 +92.45 ± 14.2 0 14 94 140 2 +196.45 ± 35.33
424077 ncm-dbt-03 583279 500 203 57 240 +104.49 ± 13.71 0 10 86 152 2 +228.08 ± 36.98
424076 ncm-dbt-02 584495 500 218 50 232 +121.45 ± 13.31 0 3 83 157 7 +265.78 ± 37.35
424075 ncm-dbt-01 584285 500 199 53 248 +104.49 ± 13.22 0 8 89 152 1 +230.16 ± 36.26
424074 ncm-dbt-03 584832 500 204 45 251 +114.45 ± 13.21 0 7 79 162 2 +256.44 ± 38.62
424073 ncm-dbt-02 585717 500 190 60 250 +92.45 ± 13.74 0 10 103 134 3 +194.57 ± 33.53
424072 ncm-dbt-05 584579 500 201 60 239 +100.7 ± 13.03 0 7 96 146 1 +219.87 ± 34.73
424071 ncm-dbt-04 568514 500 203 61 236 +101.46 ± 13.37 0 9 91 149 1 +221.9 ± 35.86
424070 ncm-dbt-01 585169 500 205 52 243 +109.83 ± 14.06 0 9 84 152 5 +236.51 ± 37.42
424069 ncm-dbt-02 585843 500 204 56 240 +106.01 ± 12.71 0 5 93 151 1 +234.38 ± 35.22
424068 ncm-dbt-03 582360 500 201 59 240 +101.46 ± 13.37 0 9 91 149 1 +221.9 ± 35.86
424067 ncm-dbt-04 571070 500 209 60 231 +106.77 ± 13.72 0 7 92 146 5 +228.08 ± 35.56
424066 ncm-dbt-05 580323 500 207 58 235 +106.77 ± 14.36 0 11 84 150 5 +228.08 ± 37.44

Commit

Commit ID e2aa1255707628aa1d70f13c88211724e34fa38e
Author Shawn Xu
Date 2025-07-24 08:13:24 UTC
Consistent syntax for class members Currently, search.cpp uses three different syntax when accessing class member variables * thisThread object references. This was a remnant from when pos.this_thread() was necessary for thread-local variable access * this object references * implicit member variable access This PR aims to deprecate thisThread and standardize this syntax to implicit variable access, which is consistent with the rest of SF's codebase. closes https://github.com/official-stockfish/Stockfish/pull/6154 no functional change
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