Dev Builds » 20260913-0730

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 06:44:37 582581 3984 1828 293 1863 +141.15 ± 4.34 0 15 470 1464 43 +337.24 ± 15.69
ncm-dbt-02 06:44:23 591858 4000 1824 262 1914 +143.28 ± 4.35 0 18 447 1490 45 +344.89 ± 16.11
ncm-dbt-03 06:45:16 584363 4014 1847 303 1864 +140.89 ± 4.29 0 9 490 1463 45 +335.58 ± 15.32
ncm-dbt-04 06:45:02 566862 4012 1800 283 1929 +138.23 ± 4.3 0 17 489 1466 34 +329.68 ± 15.38
ncm-dbt-05 06:43:57 603181 3990 1831 284 1875 +142.14 ± 4.39 0 12 477 1453 53 +337.15 ± 15.56
20000 9130 1425 9445 +141.13 ± 1.94 0 71 2373 7336 220 +336.85 ± 6.97

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
485255 ncm-dbt-04 565233 12 5 3 4 +58.39 ± 68.56 0 0 4 2 0 +120.33 ± 161.99
485254 ncm-dbt-03 582694 14 7 0 7 +190.68 ± 96.09 0 0 1 5 1 +445.23 ± 480.27
485253 ncm-dbt-01 581194 484 231 41 212 +144.12 ± 12.1 0 0 58 178 6 +346.39 ± 44.97
485252 ncm-dbt-05 603231 490 232 37 221 +146.35 ± 12.99 0 2 55 179 9 +345.45 ± 46.58
485251 ncm-dbt-02 591728 500 221 28 251 +141.44 ± 11.98 0 3 54 190 3 +346.12 ± 47.1
485250 ncm-dbt-04 568395 500 229 43 228 +135.75 ± 11.36 0 0 66 182 2 +327.17 ± 41.95
485249 ncm-dbt-03 582987 500 233 40 227 +141.44 ± 12.2 0 1 61 182 6 +336.46 ± 43.96
485248 ncm-dbt-01 581902 500 223 31 246 +140.62 ± 12.84 0 3 59 181 7 +330.23 ± 44.94
485247 ncm-dbt-05 601135 500 226 35 239 +139.81 ± 12.05 0 3 56 188 3 +339.63 ± 46.2
485246 ncm-dbt-02 591685 500 230 31 239 +146.36 ± 13.22 0 4 52 185 9 +346.12 ± 48.03
485245 ncm-dbt-04 566572 500 222 34 244 +137.37 ± 11.73 0 2 60 186 2 +333.32 ± 44.47
485244 ncm-dbt-03 582611 500 228 33 239 +143.07 ± 11.91 0 1 58 186 5 +346.12 ± 45.18
485243 ncm-dbt-05 603142 500 228 28 244 +147.19 ± 12.36 0 2 53 188 7 +356.21 ± 47.52
485242 ncm-dbt-01 584958 500 227 37 236 +138.99 ± 12.5 0 2 62 180 6 +327.18 ± 43.69
485241 ncm-dbt-02 593239 500 233 48 219 +134.95 ± 13.22 0 4 64 175 7 +309.64 ± 43.08
485240 ncm-dbt-04 568593 500 222 33 245 +138.18 ± 13.12 0 6 54 185 5 +327.18 ± 47.0
485239 ncm-dbt-03 586266 500 231 40 229 +139.81 ± 12.47 0 1 64 178 7 +327.18 ± 42.83
485238 ncm-dbt-05 603008 500 234 39 227 +143.07 ± 12.95 0 0 66 173 11 +327.17 ± 41.95
485237 ncm-dbt-01 582987 500 231 32 237 +146.36 ± 11.74 0 1 54 190 5 +359.68 ± 46.95
485236 ncm-dbt-02 590181 500 235 37 228 +145.54 ± 12.85 0 3 54 185 8 +346.12 ± 47.1
485235 ncm-dbt-04 569190 500 234 30 236 +150.51 ± 11.51 0 1 49 195 5 +377.87 ± 49.47
485234 ncm-dbt-03 584579 500 234 35 231 +146.36 ± 12.18 0 3 50 192 5 +359.68 ± 49.05
485233 ncm-dbt-05 605072 500 218 40 242 +129.35 ± 11.6 0 2 68 180 0 +309.64 ± 41.56
485232 ncm-dbt-01 584622 500 225 47 228 +129.35 ± 12.8 0 2 74 168 6 +293.29 ± 39.69
485231 ncm-dbt-02 592159 500 225 30 245 +143.07 ± 11.69 0 1 57 188 4 +349.43 ± 45.6
485230 ncm-dbt-04 566138 500 228 41 231 +136.56 ± 12.18 0 2 63 181 4 +324.17 ± 43.32
485229 ncm-dbt-03 585801 500 233 48 219 +134.95 ± 11.83 0 0 69 177 4 +318.25 ± 40.94
485228 ncm-dbt-05 599583 500 233 48 219 +134.95 ± 12.64 0 0 73 169 8 +306.84 ± 39.69
485227 ncm-dbt-01 578753 500 232 26 242 +152.18 ± 11.64 0 2 45 198 5 +385.59 ± 51.85
485226 ncm-dbt-02 592331 500 219 29 252 +138.99 ± 11.66 0 1 61 185 3 +336.46 ± 43.96
485225 ncm-dbt-04 567126 500 226 26 248 +147.19 ± 12.36 0 1 56 185 8 +352.8 ± 46.04
485224 ncm-dbt-03 583740 500 221 35 244 +135.76 ± 11.58 0 1 64 183 2 +327.18 ± 42.83
485223 ncm-dbt-05 604038 500 231 30 239 +148.02 ± 12.94 0 3 52 186 9 +352.8 ± 48.05
485222 ncm-dbt-01 581277 500 227 42 231 +134.95 ± 12.04 0 2 64 181 3 +321.19 ± 42.95
485221 ncm-dbt-02 592159 500 226 27 247 +146.36 ± 11.96 0 1 55 188 6 +356.21 ± 46.49
485220 ncm-dbt-04 563822 500 221 38 241 +133.34 ± 12.69 0 2 69 173 6 +306.84 ± 41.23
485219 ncm-dbt-03 585169 500 228 38 234 +138.99 ± 12.7 0 2 63 178 7 +324.17 ± 43.32
485218 ncm-dbt-05 606245 500 229 27 244 +148.84 ± 11.61 0 0 54 190 6 +366.77 ± 46.78
485217 ncm-dbt-01 584958 500 232 37 231 +143.07 ± 12.34 0 3 54 188 5 +346.12 ± 47.1
485216 ncm-dbt-02 591383 500 235 32 233 +149.68 ± 11.56 0 1 50 194 5 +374.11 ± 48.94
485215 ncm-dbt-03 585421 500 232 34 234 +145.54 ± 12.22 0 0 60 182 8 +346.11 ± 44.19
485214 ncm-dbt-04 566691 500 213 35 252 +129.35 ± 12.21 0 3 68 177 2 +304.07 ± 41.65

Commit

Commit ID 0f602f90349885d6379c08984fdfcd5f3da429d0
Author Tony Wang
Date 2026-09-13 07:30:46 UTC
Fail high recovery depth adjustement Gradually increaese depth after fail high instead of jumping to normal depth directly. Passed STC https://tests.stockfishchess.org/tests/view/6a8c1d4008c0f6a39c9e7d21 ``` LLR: 2.93 (-2.94,2.94) <0.00,2.00> Total: 163200 W: 41862 L: 41374 D: 79964 Ptnml(0-2): 270, 18918, 42755, 19368, 289 ``` Passed LTC https://tests.stockfishchess.org/tests/view/6a913e4708c0f6a39c9e86bb ``` LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 172530 W: 44924 L: 44339 D: 83267 Ptnml(0-2): 43, 18265, 49070, 18838, 49 ``` closes https://github.com/official-stockfish/Stockfish/pull/7122 Bench: 1649498
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