Dev Builds » 20261024-1810

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 06:42:29 585597 3904 1782 300 1822 +138.84 ± 4.4 0 17 474 1423 38 +330.04 ± 15.63
ncm-dbt-02 06:41:16 592835 3832 1778 282 1772 +143.24 ± 4.38 0 12 438 1424 42 +345.2 ± 16.25
ncm-dbt-03 06:43:38 585391 3804 1763 237 1804 +147.67 ± 4.29 0 6 409 1442 45 +362.01 ± 16.8
ncm-dbt-04 07:33:33 570600 4274 1971 277 2026 +145.68 ± 4.06 0 15 453 1629 40 +357.92 ± 16.0
ncm-dbt-05 07:33:52 603343 4186 1946 261 1979 +148.24 ± 4.33 0 20 432 1577 64 +358.36 ± 16.41
20000 9240 1357 9403 +144.78 ± 1.92 0 70 2206 7495 229 +350.61 ± 7.24

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
487477 ncm-dbt-05 605432 186 87 13 86 +146.29 ± 20.03 0 0 22 68 3 +348.95 ± 75.01 ↓
487476 ncm-dbt-04 568116 274 125 24 125 +134.39 ± 16.92 0 2 34 99 2 +317.25 ± 59.83 ↓
487475 ncm-dbt-03 583740 304 141 15 148 +153.21 ± 13.14 0 0 27 124 1 +404.43 ± 67.71 ↓
487474 ncm-dbt-02 595019 332 161 25 146 +151.19 ± 14.51 0 1 32 129 4 +377.09 ± 61.96 ↓
487473 ncm-dbt-01 586266 404 186 30 188 +141.49 ± 13.67 0 2 46 150 4 +340.01 ± 51.12 ↓
487472 ncm-dbt-05 607514 500 233 29 238 +150.51 ± 12.18 0 2 49 192 7 +370.41 ± 49.56 ↓
487471 ncm-dbt-04 570909 500 233 41 226 +140.62 ± 11.81 0 0 63 182 5 +336.45 ± 43.03 ↓
487470 ncm-dbt-03 586943 500 233 29 238 +150.51 ± 12.18 0 1 52 189 8 +366.78 ± 47.92 ↓
487469 ncm-dbt-02 593326 500 224 39 237 +134.95 ± 12.24 0 3 62 182 3 +321.19 ± 43.77 ↓
487468 ncm-dbt-01 585295 500 228 45 227 +133.34 ± 12.49 0 3 65 178 4 +312.48 ± 42.67 ↓
487467 ncm-dbt-05 602873 500 242 29 229 +158.08 ± 12.63 0 2 44 193 11 +389.56 ± 52.48 ↓
487466 ncm-dbt-04 570829 500 230 17 253 +158.08 ± 10.98 0 1 40 204 5 +415.05 ± 55.18 ↓
487465 ncm-dbt-03 584369 500 237 36 227 +148.01 ± 12.53 0 0 59 181 10 +349.43 ± 44.59 ↓
487464 ncm-dbt-02 595804 500 226 33 241 +141.44 ± 11.55 0 3 52 194 1 +352.8 ± 48.05 ↓
487463 ncm-dbt-01 588004 500 222 28 250 +142.25 ± 12.37 0 3 55 187 5 +342.85 ± 46.64 ↓
487462 ncm-dbt-05 604847 500 233 39 228 +142.25 ± 12.58 0 1 62 179 8 +333.32 ± 43.57 ↓
487461 ncm-dbt-04 570509 500 220 19 261 +148.02 ± 11.19 0 1 50 196 3 +374.11 ± 48.94 ↓
487460 ncm-dbt-03 586689 500 236 23 241 +158.08 ± 11.23 0 0 44 199 7 +406.2 ± 52.26 ↓
487459 ncm-dbt-02 589283 500 239 37 224 +148.84 ± 11.61 0 0 54 190 6 +366.77 ± 46.78 ↓
487458 ncm-dbt-01 586181 500 230 42 228 +137.37 ± 12.36 0 2 63 180 5 +324.17 ± 43.32 ↓
487457 ncm-dbt-05 603634 500 237 36 227 +148.02 ± 12.1 0 3 48 194 5 +366.78 ± 50.11 ↓
487456 ncm-dbt-04 572356 500 240 42 218 +145.54 ± 12.01 0 1 56 187 6 +352.8 ± 46.04 ↓
487455 ncm-dbt-03 585759 500 225 28 247 +144.71 ± 10.91 0 0 55 193 2 +363.19 ± 46.32 ↓
487454 ncm-dbt-02 592461 500 236 35 229 +148.02 ± 12.94 0 2 55 183 10 +349.43 ± 46.59 ↓
487453 ncm-dbt-01 585295 500 234 52 214 +132.54 ± 12.91 0 2 71 170 7 +301.33 ± 40.6 ↓
487452 ncm-dbt-05 602918 500 227 30 243 +144.71 ± 12.68 0 1 60 180 9 +339.63 ± 44.35 ↓
487451 ncm-dbt-04 571270 500 235 37 228 +145.54 ± 11.56 0 1 54 191 4 +359.68 ± 46.95 ↓
487450 ncm-dbt-03 585337 500 233 39 228 +142.25 ± 12.37 0 1 61 181 7 +336.46 ± 43.96 ↓
487449 ncm-dbt-02 592893 500 235 39 226 +143.89 ± 12.3 0 2 56 186 6 +346.12 ± 46.15 ↓
487448 ncm-dbt-01 584201 500 232 42 226 +138.99 ± 11.88 0 1 62 183 4 +333.32 ± 43.57 ↓
487447 ncm-dbt-05 601001 500 229 23 248 +152.18 ± 12.09 0 3 44 197 6 +381.7 ± 52.45 ↓
487446 ncm-dbt-04 571270 500 231 24 245 +153.02 ± 12.04 0 1 49 192 8 +377.87 ± 49.47 ↓
487445 ncm-dbt-03 584327 500 230 34 236 +143.89 ± 11.87 0 2 54 190 4 +352.8 ± 47.05 ↓
487444 ncm-dbt-02 593586 500 231 37 232 +142.25 ± 11.95 0 0 62 182 6 +339.63 ± 43.41 ↓
487443 ncm-dbt-01 583950 500 232 32 236 +147.19 ± 12.14 0 2 52 190 6 +359.68 ± 48.01 ↓
487442 ncm-dbt-05 602204 500 232 29 239 +149.68 ± 13.67 0 6 45 189 10 +356.21 ± 51.48 ↓
487441 ncm-dbt-04 568196 500 231 31 238 +147.19 ± 12.36 0 5 44 197 4 +366.78 ± 52.23 ↓
487440 ncm-dbt-03 585970 500 228 33 239 +143.07 ± 12.34 0 2 57 185 6 +342.85 ± 45.71 ↓
487439 ncm-dbt-02 590310 500 226 37 237 +138.18 ± 12.33 0 1 65 178 6 +324.17 ± 42.47 ↓
487438 ncm-dbt-01 585590 500 218 29 253 +138.18 ± 11.91 0 2 60 185 3 +333.32 ± 44.47 ↓
487437 ncm-dbt-05 599672 500 226 33 241 +141.44 ± 12.2 0 2 58 185 5 +339.63 ± 45.29 ↓
487436 ncm-dbt-04 571953 500 226 42 232 +134.15 ± 12.27 0 3 63 181 3 +318.25 ± 43.39 ↓

Commit

Commit ID ed2f9bdce55ed155f50738aef82e94a543eef55d
Author Linmiao Xu
Date 2026-10-24 18:10:38 UTC
Remove duplicate TT prefetch Passed non-regression STC: https://tests.stockfishchess.org/tests/view/6acc48cb20d2b3b562a7e94f LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 496736 W: 126451 L: 126714 D: 243571 Ptnml(0-2): 564, 52772, 141944, 52539, 549 closes https://github.com/official-stockfish/Stockfish/pull/7250 No functional change
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