Dev Builds » 20260930-1843

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 585244 4016 1834 264 1918 +143.46 ± 4.5 0 21 456 1471 60 +339.63 ± 15.96
ncm-dbt-02 06:44:40 591361 3994 1826 275 1893 +142.39 ± 4.38 0 22 445 1487 43 +342.15 ± 16.16
ncm-dbt-03 06:43:17 584171 4000 1811 296 1893 +138.49 ± 4.4 0 16 498 1441 45 +326.42 ± 15.23
ncm-dbt-04 06:43:22 567310 3996 1820 297 1879 +139.45 ± 4.34 0 13 492 1450 43 +330.8 ± 15.31
ncm-dbt-05 06:43:25 603856 3994 1843 267 1884 +144.96 ± 4.53 0 18 452 1460 67 +342.56 ± 16.02
20000 9134 1399 9467 +141.74 ± 1.98 0 90 2343 7309 258 +336.22 ± 7.02

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
485985 ncm-dbt-01 582027 16 7 0 9 +162.9 ± 50.11 0 0 1 7 0 +470.09 ± 466.68 ↓
485984 ncm-dbt-02 589027 494 223 26 245 +146.69 ± 11.81 0 1 53 188 5 +360.84 ± 47.42 ↓
485983 ncm-dbt-05 605478 494 230 31 233 +148.36 ± 12.83 0 2 53 183 9 +353.84 ± 47.52 ↓
485982 ncm-dbt-04 567839 496 229 33 234 +145.19 ± 10.93 0 0 54 192 2 +365.2 ± 46.77 ↓
485981 ncm-dbt-03 584622 500 235 43 222 +140.62 ± 12.23 0 0 65 178 7 +330.23 ± 42.3 ↓
485980 ncm-dbt-01 585042 500 219 29 252 +138.99 ± 12.5 0 3 59 183 5 +330.23 ± 44.94 ↓
485979 ncm-dbt-04 564919 500 225 38 237 +136.56 ± 12.98 0 3 64 176 7 +315.35 ± 43.03 ↓
485978 ncm-dbt-05 599450 500 231 29 240 +148.85 ± 12.27 0 1 54 187 8 +359.68 ± 46.95 ↓
485977 ncm-dbt-02 590481 500 234 25 241 +154.7 ± 12.39 0 3 43 196 8 +385.59 ± 53.09 ↓
485976 ncm-dbt-03 585674 500 226 31 243 +143.07 ± 12.54 0 1 61 180 8 +336.46 ± 43.96 ↓
485975 ncm-dbt-01 584537 500 230 25 245 +151.34 ± 11.91 0 1 50 192 7 +374.11 ± 48.94 ↓
485974 ncm-dbt-04 568355 500 231 42 227 +138.18 ± 13.12 0 0 72 167 11 +309.64 ± 40.0 ↓
485973 ncm-dbt-05 604083 500 229 37 234 +140.62 ± 12.44 0 4 54 188 4 +339.63 ± 47.1 ↓
485972 ncm-dbt-02 590353 500 225 38 237 +136.56 ± 12.39 0 3 61 182 4 +324.17 ± 44.15 ↓
485971 ncm-dbt-03 584453 500 227 39 234 +137.37 ± 11.73 0 0 66 180 4 +327.17 ± 41.95 ↓
485970 ncm-dbt-01 584748 500 229 33 238 +143.89 ± 12.09 0 3 52 191 4 +352.8 ± 48.05 ↓
485969 ncm-dbt-04 566651 500 231 36 233 +143.07 ± 12.54 0 2 58 183 7 +339.63 ± 45.29 ↓
485968 ncm-dbt-05 603231 500 225 36 239 +138.18 ± 12.73 0 1 67 174 8 +318.25 ± 41.77 ↓
485967 ncm-dbt-02 590653 500 228 38 234 +138.99 ± 12.3 0 3 58 185 4 +333.32 ± 45.35 ↓
485966 ncm-dbt-03 581902 500 217 32 251 +134.95 ± 12.44 0 3 63 180 4 +318.25 ± 43.39 ↓
485965 ncm-dbt-01 585253 500 238 35 227 +149.68 ± 13.27 0 4 49 187 10 +356.21 ± 49.54 ↓
485964 ncm-dbt-05 601580 500 228 38 234 +138.99 ± 13.29 0 4 60 178 8 +321.19 ± 44.57 ↓
485963 ncm-dbt-04 566178 500 226 43 231 +133.34 ± 13.08 0 3 68 172 7 +304.07 ± 41.65 ↓
485962 ncm-dbt-03 584369 500 219 39 242 +130.94 ± 12.76 0 3 69 173 5 +301.33 ± 41.33 ↓
485961 ncm-dbt-02 590911 500 236 33 231 +149.68 ± 12.01 0 2 49 193 6 +370.41 ± 49.56 ↓
485960 ncm-dbt-01 584369 500 232 36 232 +143.89 ± 13.7 0 2 63 172 13 +324.17 ± 43.32 ↓
485959 ncm-dbt-04 564723 500 228 38 234 +138.99 ± 11.44 0 1 60 187 2 +339.63 ± 44.35 ↓
485958 ncm-dbt-05 600203 500 226 26 248 +147.19 ± 12.14 0 1 55 187 7 +356.21 ± 46.49 ↓
485957 ncm-dbt-03 584159 500 236 41 223 +143.07 ± 13.15 0 5 52 186 7 +339.63 ± 47.98 ↓
485956 ncm-dbt-01 586308 500 220 35 245 +134.95 ± 12.24 0 2 65 179 4 +318.25 ± 42.59 ↓
485955 ncm-dbt-02 592504 500 222 44 234 +129.35 ± 13.17 0 5 67 173 5 +295.94 ± 42.08 ↓
485954 ncm-dbt-04 566454 500 229 33 238 +143.89 ± 12.09 0 3 52 191 4 +352.8 ± 48.05 ↓
485953 ncm-dbt-05 600380 500 235 35 230 +147.19 ± 13.18 0 4 51 186 9 +349.43 ± 48.52 ↓
485952 ncm-dbt-03 583531 500 219 37 244 +132.54 ± 12.71 0 2 70 172 6 +304.07 ± 40.91 ↓
485951 ncm-dbt-02 591685 500 225 37 238 +137.37 ± 12.15 0 2 62 182 4 +327.18 ± 43.69 ↓
485950 ncm-dbt-01 585674 500 231 43 226 +137.37 ± 13.71 0 4 64 172 10 +309.64 ± 43.08 ↓
485949 ncm-dbt-05 616450 500 239 35 226 +150.51 ± 13.44 0 1 58 177 14 +346.12 ± 45.18 ↓
485948 ncm-dbt-04 573365 500 221 34 245 +136.56 ± 11.76 0 1 64 182 3 +327.18 ± 42.83 ↓
485947 ncm-dbt-03 584664 500 232 34 234 +145.54 ± 11.79 0 2 52 192 4 +359.68 ± 48.01 ↓
485946 ncm-dbt-01 589240 500 228 28 244 +147.19 ± 12.36 0 2 53 188 7 +356.21 ± 47.52 ↓
485945 ncm-dbt-02 595281 500 233 34 233 +146.36 ± 12.61 0 3 52 188 7 +352.8 ± 48.05 ↓

Commit

Commit ID 49ea5ded38315cff8e67f4a677a9e7811612fbf6
Author FauziAkram
Date 2026-09-30 18:43:50 UTC
Simplify singularDepth from the bonus formula Passed STC non-reg: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 124000 W: 31413 L: 31294 D: 61293 Ptnml(0-2): 139, 14508, 32614, 14573, 166 https://tests.stockfishchess.org/tests/view/6aad39bddbd128aac8fd5609 Passed LTC non-reg: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 193296 W: 49385 L: 49341 D: 94570 Ptnml(0-2): 40, 20611, 55302, 20655, 40 https://tests.stockfishchess.org/tests/view/6ab136585146babbc9b2b54b closes https://github.com/official-stockfish/Stockfish/pull/7191 Bench: 1714434
Copyright 2011–2026 Next Chess Move LLC