Dev Builds » 20260716-0628

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 06:44:58 582625 4000 1754 319 1927 +130.44 ± 4.58 0 36 529 1399 36 +300.99 ± 14.82
ncm-dbt-02 06:47:23 590257 4000 1802 328 1870 +134.35 ± 4.53 1 30 500 1432 37 +314.63 ± 15.24
ncm-dbt-03 06:46:09 578083 4000 1778 311 1911 +133.65 ± 4.38 0 24 513 1435 28 +314.99 ± 15.03
ncm-dbt-04 06:44:17 568177 4000 1774 314 1912 +132.94 ± 4.52 1 28 518 1416 37 +309.64 ± 14.96
ncm-dbt-05 06:46:50 603980 4000 1802 296 1902 +137.58 ± 4.37 0 19 494 1449 38 +325.67 ± 15.31
20000 8910 1568 9522 +133.79 ± 2.0 2 137 2554 7131 176 +313.05 ± 6.73

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
478938 ncm-dbt-03 578177 500 226 45 229 +131.74 ± 12.34 0 2 69 175 4 +306.84 ± 41.23
478937 ncm-dbt-04 568196 500 217 45 238 +124.6 ± 13.45 0 6 71 168 5 +280.42 ± 40.83
478936 ncm-dbt-01 584201 500 227 38 235 +138.18 ± 13.5 0 8 50 187 5 +327.18 ± 48.58
478935 ncm-dbt-05 603634 500 229 33 238 +143.89 ± 12.51 0 2 57 184 7 +342.85 ± 45.71
478934 ncm-dbt-02 592850 500 226 34 240 +140.62 ± 12.64 0 3 58 183 6 +333.32 ± 45.35
478933 ncm-dbt-01 579992 500 220 34 246 +135.76 ± 12.62 0 3 63 179 5 +318.25 ± 43.39
478932 ncm-dbt-03 577725 500 227 50 223 +128.55 ± 12.04 0 3 68 178 1 +304.07 ± 41.65
478931 ncm-dbt-04 568196 500 223 39 238 +134.15 ± 13.05 0 3 67 173 7 +306.84 ± 41.99
478930 ncm-dbt-05 600735 500 225 40 235 +134.95 ± 13.41 0 7 56 182 5 +315.35 ± 46.07
478929 ncm-dbt-02 591082 500 222 38 240 +134.15 ± 13.05 1 2 64 178 5 +315.35 ± 43.03
478928 ncm-dbt-01 583782 500 212 40 248 +124.6 ± 12.9 0 4 74 168 4 +282.94 ± 39.86
478927 ncm-dbt-03 575883 500 214 30 256 +134.15 ± 12.67 0 4 62 180 4 +315.35 ± 43.81
478926 ncm-dbt-04 568156 500 216 32 252 +134.15 ± 12.06 0 2 65 180 3 +318.25 ± 42.59
478925 ncm-dbt-05 604622 500 221 30 249 +139.8 ± 11.84 0 0 64 181 5 +333.32 ± 42.66
478924 ncm-dbt-02 587622 500 215 34 251 +131.74 ± 12.34 0 3 66 178 3 +309.64 ± 42.33
478880 ncm-dbt-02 588686 500 228 45 227 +133.34 ± 12.89 0 3 67 174 6 +306.84 ± 41.99
478879 ncm-dbt-01 580282 500 227 46 227 +131.74 ± 12.54 0 3 67 176 4 +306.84 ± 41.99
478878 ncm-dbt-03 578095 500 223 31 246 +140.62 ± 12.02 0 3 55 189 3 +342.85 ± 46.64
478877 ncm-dbt-04 569829 500 234 33 233 +148.02 ± 11.65 0 1 52 192 5 +366.78 ± 47.92
478876 ncm-dbt-05 602784 500 225 41 234 +134.15 ± 12.67 0 2 68 174 6 +309.64 ± 41.56
478875 ncm-dbt-02 587537 500 234 39 227 +143.07 ± 13.34 0 5 53 184 8 +336.46 ± 47.52
478874 ncm-dbt-01 583824 500 220 40 240 +130.94 ± 13.14 0 5 65 175 5 +301.33 ± 42.75
478873 ncm-dbt-03 580945 500 220 38 242 +132.54 ± 13.28 0 5 64 175 6 +304.07 ± 43.1
478872 ncm-dbt-04 566691 500 216 43 241 +125.38 ± 13.79 0 8 66 171 5 +282.94 ± 42.37
478871 ncm-dbt-05 604757 500 223 35 242 +137.37 ± 11.94 0 3 58 187 2 +333.32 ± 45.35
478870 ncm-dbt-01 582360 500 214 45 241 +122.24 ± 12.76 0 4 76 167 3 +277.93 ± 39.29
478869 ncm-dbt-04 569310 500 215 40 245 +126.97 ± 13.22 0 5 70 170 5 +288.06 ± 41.11
478868 ncm-dbt-03 579001 500 218 39 243 +130.14 ± 12.78 0 3 70 172 5 +298.62 ± 41.01
478867 ncm-dbt-02 591728 500 229 47 224 +132.54 ± 12.91 0 6 59 182 3 +312.48 ± 44.93
478866 ncm-dbt-05 606607 500 226 42 232 +134.15 ± 12.27 0 2 66 178 4 +315.35 ± 42.24
478865 ncm-dbt-01 583950 500 218 42 240 +127.76 ± 13.39 0 6 67 172 5 +290.66 ± 42.08
478864 ncm-dbt-04 567007 500 228 39 233 +138.18 ± 12.93 1 3 56 186 4 +333.32 ± 46.21
478863 ncm-dbt-02 590396 500 230 43 227 +136.56 ± 12.79 0 4 60 181 5 +321.19 ± 44.57
478862 ncm-dbt-05 604802 500 228 36 236 +140.62 ± 12.64 0 3 58 183 6 +333.32 ± 45.35
478861 ncm-dbt-03 576047 500 226 45 229 +131.74 ± 12.14 0 2 68 177 3 +309.64 ± 41.56
478860 ncm-dbt-04 568037 500 225 43 232 +132.54 ± 11.7 0 0 71 176 3 +312.47 ± 40.3
478859 ncm-dbt-01 582611 500 216 34 250 +132.54 ± 12.71 0 3 67 175 5 +306.84 ± 41.99
478858 ncm-dbt-02 592159 500 218 48 234 +123.02 ± 12.37 0 4 73 172 1 +285.49 ± 40.16
478857 ncm-dbt-05 603903 500 225 39 236 +135.75 ± 11.58 0 0 67 180 3 +324.16 ± 41.61
478856 ncm-dbt-03 578794 500 224 33 243 +139.81 ± 11.62 0 2 57 189 2 +342.85 ± 45.71

Commit

Commit ID 3e3ee33a75022e763bcd7ee8ce56ec2457fe9d69
Author mstembera
Date 2026-07-16 06:28:24 UTC
Simplify HalfKAv2_hm::write_indices() STC: https://tests.stockfishchess.org/tests/view/6a4b4b32f97ff95f78795de9 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 196064 W: 51063 L: 51020 D: 93981 Ptnml(0-2): 367, 21491, 54292, 21496, 386 closes https://github.com/official-stockfish/Stockfish/pull/6970 No functional change
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