Dev Builds » 20260419-0523

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 06:40:26 582000 4000 1721 374 1905 +121.75 ± 4.52 0 34 608 1335 23 +276.69 ± 13.78
ncm-dbt-02 06:40:11 586050 4000 1706 328 1966 +124.8 ± 4.49 1 26 594 1352 27 +285.49 ± 13.93
ncm-dbt-03 06:38:59 583782 4000 1729 335 1936 +126.37 ± 4.55 2 28 575 1364 31 +289.68 ± 14.18
ncm-dbt-04 06:40:09 568303 4000 1734 361 1905 +124.3 ± 4.41 0 25 598 1356 21 +285.49 ± 13.87
ncm-dbt-05 06:42:36 582103 4000 1757 379 1864 +124.8 ± 4.62 2 33 583 1349 33 +283.9 ± 14.09
20000 8647 1777 9576 +124.4 ± 2.02 5 146 2958 6756 135 +284.22 ± 6.24

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
464997 ncm-dbt-05 582652 500 214 51 235 +117.55 ± 13.36 0 7 76 164 3 +263.42 ± 39.41
464996 ncm-dbt-02 586858 500 214 55 231 +114.45 ± 13.38 1 6 77 165 1 +261.07 ± 39.14
464995 ncm-dbt-04 568912 500 216 49 235 +120.67 ± 12.6 0 3 80 164 3 +273.0 ± 38.12
464994 ncm-dbt-01 583950 500 214 41 245 +125.38 ± 13.43 0 8 64 175 3 +288.06 ± 43.03
464993 ncm-dbt-03 586054 500 222 49 229 +125.38 ± 13.25 0 6 69 171 4 +285.49 ± 41.44
464992 ncm-dbt-05 582235 500 220 40 240 +130.94 ± 12.56 0 4 65 178 3 +306.84 ± 42.73
464991 ncm-dbt-02 584916 500 197 34 269 +117.55 ± 12.64 0 4 81 163 2 +265.78 ± 37.95
464990 ncm-dbt-04 568355 500 216 38 246 +129.35 ± 11.81 0 1 72 175 2 +304.07 ± 40.16
464989 ncm-dbt-01 582903 500 215 47 238 +121.45 ± 12.4 0 3 78 167 2 +277.93 ± 38.66
464988 ncm-dbt-03 585674 500 219 28 253 +139.81 ± 12.26 0 3 57 186 4 +336.46 ± 45.77
464987 ncm-dbt-05 579413 500 224 47 229 +128.55 ± 13.19 0 4 71 169 6 +290.66 ± 40.76
464986 ncm-dbt-02 584537 500 214 34 252 +130.94 ± 12.56 0 2 71 172 5 +301.33 ± 40.6
464985 ncm-dbt-04 567958 500 218 45 237 +125.38 ± 12.7 0 4 72 171 3 +288.06 ± 40.46
464984 ncm-dbt-01 578218 500 213 42 245 +123.81 ± 12.54 0 5 70 174 1 +288.06 ± 41.11
464983 ncm-dbt-03 585801 500 211 39 250 +124.6 ± 12.9 0 4 74 168 4 +282.94 ± 39.86
464982 ncm-dbt-02 586604 500 214 46 240 +121.45 ± 13.84 0 6 77 160 7 +265.78 ± 39.12
464981 ncm-dbt-05 584411 500 226 43 231 +133.34 ± 12.69 0 2 69 173 6 +306.84 ± 41.23
464980 ncm-dbt-04 568275 500 221 45 234 +127.76 ± 13.02 0 5 68 173 4 +293.29 ± 41.75
464979 ncm-dbt-01 582277 500 215 61 224 +110.6 ± 12.52 0 3 92 153 2 +245.2 ± 35.25
464978 ncm-dbt-03 582110 500 218 48 234 +123.02 ± 12.93 0 5 73 169 3 +280.42 ± 40.21
464977 ncm-dbt-02 586393 500 217 37 246 +130.94 ± 11.76 0 2 67 180 1 +312.48 ± 41.9
464976 ncm-dbt-05 582193 500 214 39 247 +126.97 ± 12.47 0 5 66 178 1 +298.62 ± 42.41
464975 ncm-dbt-04 565469 500 219 45 236 +126.17 ± 12.68 0 4 71 172 3 +290.66 ± 40.76
464974 ncm-dbt-01 583237 500 204 48 248 +112.14 ± 13.04 0 5 87 155 3 +247.41 ± 36.56
464973 ncm-dbt-03 583154 500 219 46 235 +125.39 ± 13.43 1 3 73 168 5 +285.49 ± 40.16
464972 ncm-dbt-02 586139 500 221 37 242 +134.15 ± 11.86 0 1 67 179 3 +318.25 ± 41.77
464971 ncm-dbt-05 581361 500 218 58 224 +115.23 ± 13.72 1 4 84 156 5 +254.16 ± 37.27
464970 ncm-dbt-04 567244 500 210 41 249 +122.24 ± 12.76 0 5 73 170 2 +280.42 ± 40.21
464969 ncm-dbt-03 580987 500 219 38 243 +131.74 ± 12.14 0 2 68 177 3 +309.64 ± 41.56
464968 ncm-dbt-01 580862 500 222 47 231 +126.97 ± 12.85 0 4 71 171 4 +290.66 ± 40.76
464967 ncm-dbt-02 586943 500 219 45 236 +126.17 ± 12.68 0 2 77 166 5 +285.49 ± 38.83
464966 ncm-dbt-04 570589 500 223 53 224 +123.02 ± 12.37 0 2 79 166 3 +280.42 ± 38.28
464965 ncm-dbt-05 580365 500 215 48 237 +120.67 ± 12.78 0 4 78 165 3 +273.0 ± 38.74
464964 ncm-dbt-01 583028 500 222 44 234 +129.35 ± 12.99 0 3 72 169 6 +293.29 ± 40.39
464963 ncm-dbt-03 582569 500 219 36 245 +133.34 ± 12.09 0 1 69 176 4 +312.48 ± 41.11
464962 ncm-dbt-02 586012 500 210 40 250 +123.02 ± 12.56 0 3 77 167 3 +280.42 ± 38.93
464961 ncm-dbt-05 584201 500 226 53 221 +125.39 ± 13.61 1 3 74 166 6 +282.94 ± 39.86
464960 ncm-dbt-04 569629 500 211 45 244 +119.89 ± 11.84 0 1 83 165 1 +275.45 ± 37.11
464959 ncm-dbt-03 583908 500 202 51 247 +108.3 ± 13.56 1 4 92 149 4 +236.51 ± 35.43
464958 ncm-dbt-01 581527 500 216 44 240 +124.6 ± 12.33 0 3 74 171 2 +288.06 ± 39.79

Commit

Commit ID ce7848f7cc4a7f7eecdcc58a68cf424ec0fcaf1c
Author FauziAkram
Date 2026-04-19 05:23:25 UTC
Remove the Redundant ply Variables in Benchmark Calculations In setup_benchmark, the variables evaluating the current ply simply mirror the exact iterative progress of the string arrays loop (since ply just increments by 1 with every pass). We can delete the separate integer assignment and execute it securely within the loop declaration. closes https://github.com/official-stockfish/Stockfish/pull/6732 No functional change
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