Dev Builds » 20260419-0515

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 584095 4000 1768 338 1894 +129.95 ± 4.48 0 27 549 1391 33 +300.31 ± 14.51
ncm-dbt-02 06:40:16 585406 4000 1760 365 1875 +126.47 ± 4.57 0 35 567 1366 32 +289.03 ± 14.29
ncm-dbt-03 06:41:19 584511 4010 1780 354 1876 +129.19 ± 4.53 1 24 566 1376 38 +296.45 ± 14.28
ncm-dbt-04 06:40:52 568119 3990 1740 341 1909 +127.22 ± 4.65 0 39 556 1362 38 +289.49 ± 14.45
ncm-dbt-05 06:40:27 582657 4000 1731 374 1895 +122.73 ± 4.58 0 28 624 1311 37 +275.45 ± 13.57
20000 8779 1772 9449 +127.11 ± 2.04 1 153 2862 6806 178 +290.01 ± 6.35

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
465425 ncm-dbt-03 583866 10 4 1 5 +107.43 ± 84.35 0 0 2 3 0 +240.65 ± 570.11
465424 ncm-dbt-04 567839 490 220 44 226 +130.62 ± 14.24 0 6 66 164 9 +289.12 ± 42.41
465423 ncm-dbt-02 584034 500 214 49 237 +119.11 ± 12.99 0 6 75 167 2 +270.57 ± 39.67
465422 ncm-dbt-05 579909 500 216 47 237 +122.24 ± 12.19 0 1 82 164 3 +277.93 ± 37.36
465421 ncm-dbt-01 584495 500 220 41 239 +130.14 ± 12.59 0 3 69 174 4 +301.33 ± 41.33
465420 ncm-dbt-03 583698 500 215 37 248 +129.35 ± 13.17 0 4 70 170 6 +293.29 ± 41.07
465419 ncm-dbt-04 568514 500 215 38 247 +128.55 ± 13.73 0 7 65 172 6 +290.66 ± 42.73
465418 ncm-dbt-02 585843 500 213 47 240 +119.89 ± 12.98 0 5 77 165 3 +270.57 ± 39.07
465417 ncm-dbt-05 579661 500 212 40 248 +124.6 ± 12.9 0 4 74 168 4 +282.94 ± 39.86
465416 ncm-dbt-01 582569 500 221 49 230 +124.6 ± 12.71 0 5 70 173 2 +288.06 ± 41.11
465415 ncm-dbt-03 583489 500 221 49 230 +124.6 ± 12.33 0 3 74 171 2 +288.06 ± 39.79
465414 ncm-dbt-04 569230 500 219 46 235 +125.38 ± 13.07 0 4 74 167 5 +282.94 ± 39.86
465413 ncm-dbt-01 582736 500 220 46 234 +126.17 ± 12.49 0 2 76 168 4 +288.06 ± 39.11
465412 ncm-dbt-02 584243 500 217 47 236 +123.02 ± 12.93 0 4 76 166 4 +277.93 ± 39.29
465411 ncm-dbt-05 583028 500 210 55 235 +111.37 ± 13.56 0 7 85 154 4 +243.0 ± 37.13
465410 ncm-dbt-03 585211 500 220 39 241 +131.74 ± 13.3 1 4 62 179 4 +309.64 ± 43.82
465409 ncm-dbt-04 569669 500 232 41 227 +139.81 ± 11.62 0 1 60 186 3 +339.63 ± 44.35
465408 ncm-dbt-02 585970 500 221 47 232 +126.17 ± 13.42 0 4 75 164 7 +280.42 ± 39.57
465407 ncm-dbt-05 583908 500 215 60 225 +111.37 ± 13.73 0 4 95 143 8 +234.38 ± 34.71
465406 ncm-dbt-01 584537 500 218 41 241 +128.55 ± 12.82 0 5 66 176 3 +298.62 ± 42.41
465405 ncm-dbt-03 585928 500 229 47 224 +132.54 ± 12.32 0 2 68 176 4 +309.64 ± 41.56
465404 ncm-dbt-04 566651 500 215 42 243 +125.38 ± 12.89 0 5 70 172 3 +288.06 ± 41.11
465403 ncm-dbt-01 586181 500 227 29 244 +145.54 ± 12.22 0 3 51 191 5 +356.21 ± 48.54
465402 ncm-dbt-02 585759 500 226 41 233 +134.95 ± 13.22 0 5 61 178 6 +312.48 ± 44.19
465401 ncm-dbt-05 582652 500 212 47 241 +119.11 ± 12.99 0 2 87 155 6 +261.07 ± 36.27
465400 ncm-dbt-03 586139 500 225 45 230 +130.94 ± 12.56 0 2 71 172 5 +301.33 ± 40.6
465399 ncm-dbt-04 565941 500 212 43 245 +122.24 ± 13.12 0 5 75 166 4 +275.45 ± 39.63
465398 ncm-dbt-01 581943 500 225 35 240 +138.99 ± 13.1 0 1 68 171 10 +315.35 ± 41.44
465397 ncm-dbt-02 585042 500 228 51 221 +128.55 ± 13.38 0 5 69 170 6 +290.66 ± 41.43
465396 ncm-dbt-05 584034 500 225 47 228 +129.35 ± 12.41 0 3 69 175 3 +301.33 ± 41.33
465395 ncm-dbt-03 583740 500 222 47 231 +126.97 ± 12.85 0 2 77 165 6 +285.49 ± 38.83
465394 ncm-dbt-04 567958 500 204 43 253 +116.0 ± 12.84 0 4 84 159 3 +258.75 ± 37.2
465393 ncm-dbt-02 586266 500 224 41 235 +133.34 ± 11.67 0 1 67 180 2 +318.25 ± 41.77
465392 ncm-dbt-01 583740 500 220 56 224 +118.33 ± 12.44 0 5 76 169 0 +273.0 ± 39.35
465391 ncm-dbt-05 583656 500 218 39 243 +130.14 ± 12.39 0 4 65 179 2 +306.84 ± 42.73
465390 ncm-dbt-03 583531 500 219 40 241 +130.14 ± 12.78 0 4 67 175 4 +301.33 ± 42.04
465389 ncm-dbt-02 586097 500 217 42 241 +126.97 ± 12.66 0 5 67 176 2 +295.94 ± 42.08
465388 ncm-dbt-04 569151 500 223 44 233 +130.14 ± 13.52 0 7 62 176 5 +298.62 ± 43.77
465387 ncm-dbt-05 584411 500 223 39 238 +134.15 ± 13.05 0 3 67 173 7 +306.84 ± 41.99
465386 ncm-dbt-03 585000 500 225 49 226 +127.76 ± 13.21 0 3 75 165 7 +285.49 ± 39.5
465385 ncm-dbt-01 586562 500 217 41 242 +127.76 ± 12.84 0 3 73 169 5 +290.66 ± 40.08

Commit

Commit ID 95f3680080799d1a9e1b39ceec78a1eff789c6c2
Author FauziAkram
Date 2026-04-19 05:15:43 UTC
Replace constant LMR history divisor with depth-based array Passed STC: LLR: 2.97 (-2.94,2.94) <0.00,2.00> Total: 677344 W: 175301 L: 174041 D: 328002 Ptnml(0-2): 2018, 79669, 174166, 80673, 2146 https://tests.stockfishchess.org/tests/view/69cfae021668971c9da23b80 Passed LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 46470 W: 11988 L: 11651 D: 22831 Ptnml(0-2): 37, 4877, 13055, 5244, 22 https://tests.stockfishchess.org/tests/view/69dcd13c3ca80bdf151d4ab5 Passed VLTC (non-reg.): LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 58986 W: 15120 L: 14947 D: 28919 Ptnml(0-2): 7, 5835, 17636, 6008, 7 https://tests.stockfishchess.org/tests/view/69debc6c5c67bee7d241ffe9 closes https://github.com/official-stockfish/Stockfish/pull/6741 Bench: 2723949
Copyright 2011–2026 Next Chess Move LLC