Dev Builds » 20260420-1542

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 06:40:43 583155 4000 1742 349 1909 +126.28 ± 4.39 0 22 586 1369 23 +291.32 ± 14.01
ncm-dbt-02 06:40:54 586318 4016 1778 363 1875 +127.9 ± 4.41 0 22 578 1379 29 +294.77 ± 14.11
ncm-dbt-03 06:40:16 584483 4000 1751 359 1890 +126.18 ± 4.5 0 29 579 1363 29 +289.03 ± 14.12
ncm-dbt-04 06:39:20 567453 3992 1747 368 1877 +125.17 ± 4.47 1 20 604 1341 30 +285.72 ± 13.78
ncm-dbt-05 06:41:16 584804 3992 1754 360 1878 +126.65 ± 4.47 0 23 588 1353 32 +289.6 ± 13.99
20000 8772 1799 9429 +126.43 ± 1.99 1 116 2935 6805 143 +290.08 ± 6.25

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
465125 ncm-dbt-02 586097 16 7 2 7 +112.26 ± 65.75 0 0 3 5 0 +254.61 ± 287.37
465124 ncm-dbt-04 567601 492 213 41 238 +126.81 ± 13.18 0 6 65 172 3 +292.62 ± 42.75
465123 ncm-dbt-05 585421 492 216 46 230 +125.2 ± 12.23 0 2 74 168 2 +289.96 ± 39.67
465122 ncm-dbt-03 583572 500 210 45 245 +119.11 ± 12.43 0 4 78 167 1 +273.0 ± 38.74
465121 ncm-dbt-01 581777 500 225 42 233 +133.34 ± 13.26 0 6 60 179 5 +309.64 ± 44.55
465120 ncm-dbt-02 586985 500 216 58 226 +113.68 ± 12.5 0 3 88 157 2 +254.16 ± 36.15
465119 ncm-dbt-04 567997 500 206 34 260 +124.6 ± 12.71 0 5 70 173 2 +288.06 ± 41.11
465118 ncm-dbt-05 577807 500 217 42 241 +126.97 ± 13.76 0 7 67 170 6 +285.49 ± 42.08
465117 ncm-dbt-03 586012 500 217 38 245 +130.14 ± 12.39 0 2 71 173 4 +301.33 ± 40.6
465116 ncm-dbt-01 584832 500 212 32 256 +130.94 ± 11.96 0 1 71 175 3 +306.84 ± 40.47
465115 ncm-dbt-02 586731 500 214 45 241 +122.24 ± 11.79 0 2 77 171 0 +285.49 ± 38.83
465114 ncm-dbt-04 566612 500 220 48 232 +124.6 ± 12.71 0 2 79 164 5 +280.42 ± 38.28
465113 ncm-dbt-05 583950 500 227 45 228 +132.54 ± 12.52 0 1 72 171 6 +304.07 ± 40.16
465112 ncm-dbt-03 584243 500 227 44 229 +133.34 ± 12.69 0 2 69 173 6 +306.84 ± 41.23
465111 ncm-dbt-01 582778 500 219 43 238 +127.76 ± 12.06 0 1 75 171 3 +295.94 ± 39.27
465110 ncm-dbt-02 586350 500 215 41 244 +126.17 ± 12.3 0 3 72 173 2 +293.29 ± 40.39
465109 ncm-dbt-04 566060 500 225 45 230 +130.94 ± 12.17 0 0 75 170 5 +301.33 ± 39.1
465108 ncm-dbt-01 584285 500 220 48 232 +124.6 ± 12.53 0 4 72 172 2 +288.06 ± 40.46
465107 ncm-dbt-05 582193 500 216 45 239 +123.81 ± 11.96 0 2 76 171 1 +288.06 ± 39.11
465106 ncm-dbt-03 582778 500 221 39 240 +132.54 ± 12.32 0 2 68 176 4 +309.64 ± 41.56
465105 ncm-dbt-02 587070 500 221 40 239 +131.74 ± 12.54 0 5 61 182 2 +312.48 ± 44.19
465104 ncm-dbt-04 567205 500 212 56 232 +112.14 ± 12.69 0 5 85 159 1 +251.89 ± 37.03
465103 ncm-dbt-01 581943 500 223 46 231 +128.55 ± 11.41 0 0 74 175 1 +304.07 ± 39.39
465102 ncm-dbt-05 583237 500 219 52 229 +120.67 ± 12.6 0 3 80 164 3 +273.0 ± 38.12
465101 ncm-dbt-03 586604 500 216 43 241 +125.38 ± 13.07 0 5 71 170 4 +285.49 ± 40.81
465100 ncm-dbt-02 586943 500 236 41 223 +143.07 ± 12.34 0 2 57 185 6 +342.85 ± 45.71
465099 ncm-dbt-01 583572 500 214 45 241 +122.24 ± 12.57 0 3 78 166 3 +277.93 ± 38.66
465098 ncm-dbt-04 567244 500 228 43 229 +134.95 ± 12.44 0 0 72 171 7 +309.64 ± 40.0
465097 ncm-dbt-03 584706 500 209 45 246 +118.33 ± 13.0 0 5 79 163 3 +265.78 ± 38.54
465096 ncm-dbt-05 584664 500 222 46 232 +127.76 ± 12.65 0 1 78 165 6 +288.06 ± 38.42
465095 ncm-dbt-02 586097 500 224 44 232 +130.94 ± 12.37 0 1 73 171 5 +301.33 ± 39.86
465094 ncm-dbt-04 568077 500 222 51 227 +123.81 ± 11.96 0 1 79 168 2 +285.49 ± 38.15
465093 ncm-dbt-01 582193 500 217 47 236 +123.02 ± 13.11 0 4 77 164 5 +275.45 ± 39.01
465092 ncm-dbt-03 582068 500 226 54 220 +124.6 ± 12.71 0 3 76 167 4 +282.94 ± 39.21
465091 ncm-dbt-02 584916 500 222 47 231 +126.97 ± 12.28 0 2 74 171 3 +293.29 ± 39.69
465090 ncm-dbt-05 582819 500 212 39 249 +125.38 ± 13.25 0 5 72 168 5 +282.94 ± 40.5
465089 ncm-dbt-04 568832 500 221 50 229 +123.81 ± 13.1 1 1 79 164 5 +280.42 ± 38.28
465088 ncm-dbt-02 585674 500 223 45 232 +129.35 ± 13.72 0 4 73 164 9 +285.49 ± 40.16
465087 ncm-dbt-01 583866 500 212 46 242 +119.89 ± 12.23 0 3 79 167 1 +275.45 ± 38.39
465086 ncm-dbt-03 585885 500 225 51 224 +126.17 ± 13.06 0 6 67 174 3 +290.66 ± 42.08
465085 ncm-dbt-05 598347 500 225 45 230 +130.94 ± 12.17 0 2 69 176 3 +306.84 ± 41.23

Commit

Commit ID 583e0c1c75b3474d4a1c5c44ca33a3ac47ca360e
Author Disservin
Date 2026-04-20 15:42:47 UTC
cleanup feature detection code makes the main dispatch logic more easy to follow and possibly update closes https://github.com/official-stockfish/Stockfish/pull/6753 No functional change
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