Dev Builds » 20261025-2011

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 07:31:26 586569 4072 1877 280 1915 +143.97 ± 4.27 0 14 458 1517 47 +347.19 ± 15.9
ncm-dbt-02 06:41:43 592882 4000 1821 260 1919 +143.18 ± 4.24 0 17 440 1508 35 +348.6 ± 16.24
ncm-dbt-03 06:43:23 585456 4000 1813 247 1940 +143.69 ± 4.22 0 16 436 1514 34 +351.11 ± 16.31
ncm-dbt-04 06:44:49 571925 4000 1820 273 1907 +141.74 ± 4.37 0 20 456 1481 43 +339.63 ± 15.96
ncm-dbt-05 06:43:15 606833 3928 1822 256 1850 +146.64 ± 4.38 1 18 405 1494 46 +358.32 ± 16.95
20000 9153 1316 9531 +143.83 ± 1.92 1 85 2195 7514 205 +348.85 ± 7.26

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
487338 ncm-dbt-01 587452 72 34 5 33 +148.32 ± 26.91 0 0 7 29 0 +387.08 ± 151.7 ↓
487337 ncm-dbt-05 601224 428 190 30 208 +136.49 ± 13.65 0 4 49 158 3 +325.4 ± 49.5 ↓
487336 ncm-dbt-03 586181 500 222 30 248 +140.62 ± 12.02 0 1 61 183 5 +336.46 ± 43.96 ↓
487335 ncm-dbt-02 591943 500 224 23 253 +148.02 ± 11.88 0 2 50 193 5 +366.78 ± 49.02 ↓
487334 ncm-dbt-04 572880 500 229 36 235 +141.44 ± 11.98 0 1 60 184 5 +339.63 ± 44.35 ↓
487333 ncm-dbt-01 584327 500 241 51 208 +138.99 ± 13.29 0 3 63 175 9 +318.25 ± 43.39 ↓
487332 ncm-dbt-05 606110 500 228 46 226 +132.54 ± 12.52 0 4 63 180 3 +312.48 ± 43.44 ↓
487331 ncm-dbt-03 586520 500 222 24 254 +145.54 ± 11.56 0 2 51 194 3 +363.2 ± 48.51 ↓
487330 ncm-dbt-02 593282 500 231 35 234 +143.89 ± 11.19 0 1 54 193 2 +359.68 ± 46.95 ↓
487329 ncm-dbt-04 571230 500 222 33 245 +138.18 ± 12.12 0 3 58 186 3 +333.32 ± 45.35 ↓
487328 ncm-dbt-01 587367 500 223 36 241 +136.56 ± 12.59 0 2 65 177 6 +318.25 ± 42.59 ↓
487327 ncm-dbt-05 607332 500 229 30 241 +146.36 ± 12.61 1 2 49 193 5 +363.2 ± 49.57 ↓
487326 ncm-dbt-02 591943 500 235 33 232 +148.85 ± 11.83 0 1 52 191 6 +366.78 ± 47.92 ↓
487325 ncm-dbt-03 581777 500 229 28 243 +148.02 ± 12.1 0 1 54 188 7 +359.68 ± 46.95 ↓
487324 ncm-dbt-04 571351 500 229 31 240 +145.54 ± 11.1 0 2 49 198 1 +370.41 ± 49.56 ↓
487323 ncm-dbt-01 586689 500 222 36 242 +135.76 ± 11.58 0 2 61 186 1 +330.23 ± 44.08 ↓
487322 ncm-dbt-05 607196 500 233 32 235 +148.02 ± 12.32 0 3 49 192 6 +363.2 ± 49.57 ↓
487321 ncm-dbt-02 593196 500 225 39 236 +135.76 ± 11.8 0 2 62 184 2 +327.18 ± 43.69 ↓
487320 ncm-dbt-03 585169 500 224 33 243 +139.81 ± 12.05 0 2 59 185 4 +336.46 ± 44.87 ↓
487319 ncm-dbt-04 571592 500 228 33 239 +143.07 ± 11.47 0 4 47 199 0 +363.2 ± 50.62 ↓
487318 ncm-dbt-01 585379 500 230 34 236 +143.89 ± 11.87 0 1 57 187 5 +349.43 ± 45.6 ↓
487317 ncm-dbt-05 605252 500 231 32 237 +146.36 ± 12.18 0 3 50 192 5 +359.68 ± 49.05 ↓
487316 ncm-dbt-02 592418 500 225 39 236 +135.76 ± 13.01 0 4 62 178 6 +315.35 ± 43.81 ↓
487315 ncm-dbt-03 586435 500 233 34 233 +146.36 ± 11.52 0 1 53 192 4 +363.2 ± 47.43 ↓
487314 ncm-dbt-04 569829 500 230 36 234 +142.25 ± 12.98 0 1 64 175 10 +327.18 ± 42.83 ↓
487313 ncm-dbt-01 587113 500 236 32 232 +150.51 ± 12.62 0 2 51 188 9 +363.2 ± 48.51 ↓
487312 ncm-dbt-05 604847 500 236 29 235 +153.02 ± 11.82 0 0 51 191 8 +377.86 ± 48.25 ↓
487311 ncm-dbt-02 593542 500 232 31 237 +148.02 ± 12.1 0 3 48 194 5 +366.78 ± 50.11 ↓
487310 ncm-dbt-03 582360 500 232 33 235 +146.36 ± 12.4 0 4 48 193 5 +359.68 ± 50.07 ↓
487309 ncm-dbt-04 572437 500 236 38 226 +145.54 ± 13.05 0 1 61 177 11 +336.46 ± 43.96 ↓
487308 ncm-dbt-01 588302 500 223 23 254 +147.19 ± 11.7 0 2 50 194 4 +366.78 ± 49.02 ↓
487307 ncm-dbt-05 605974 500 243 28 229 +159.78 ± 11.6 0 1 41 200 8 +410.58 ± 54.45 ↓
487306 ncm-dbt-02 593672 500 223 33 244 +138.99 ± 12.3 0 2 61 182 5 +330.23 ± 44.08 ↓
487305 ncm-dbt-03 589112 500 227 29 244 +145.54 ± 11.33 0 1 53 193 3 +363.2 ± 47.43 ↓
487304 ncm-dbt-04 573163 500 217 36 247 +131.74 ± 13.49 0 6 63 175 6 +301.33 ± 43.45 ↓
487303 ncm-dbt-01 587579 500 235 29 236 +152.18 ± 11.64 0 0 51 192 7 +377.86 ± 48.25 ↓
487302 ncm-dbt-05 616731 500 232 29 239 +149.68 ± 12.23 0 1 53 188 8 +363.2 ± 47.43 ↓
487301 ncm-dbt-02 593066 500 226 27 247 +146.36 ± 11.74 0 2 51 193 4 +363.2 ± 48.51 ↓
487300 ncm-dbt-03 586097 500 224 36 240 +137.37 ± 12.36 0 4 57 186 3 +330.23 ± 45.79 ↓
487299 ncm-dbt-04 572921 500 229 30 241 +146.36 ± 12.4 0 2 54 187 7 +352.8 ± 47.05 ↓
487298 ncm-dbt-01 584916 500 233 34 233 +146.36 ± 12.18 0 2 53 189 6 +356.21 ± 47.52 ↓

Commit

Commit ID 72d52bbec20e245d52ffc34b26fb50ca946d378c
Author Torsten Hellwig
Date 2026-10-25 20:11:57 UTC
Ensure valid score range for seekMate With MultiPV, score is set to -VALUE_INFINITE on fail low. These lines are then incorrectly searched with seekMate starting at depth 3 (seekMate threshold 25194). If score is just checked against -VALUE_INFINITE, seekMate would barely be used in MultiPV lines anymore. With this patch, we use previousScore for MultiPV to use the best available scores and check for -VALUE_INFINITE. In addition, it includes a patch by @HappyNoah-1 that only calculates seekMateThreshold once when rootDepth is increased. No Fishtest test, as it is non-functional with MultiPV 1. The issue came up during a Codex review in another repository. STC for the @HappyNoah-1 patch https://tests.stockfishchess.org/tests/view/6ad67dc7733e627f7058c938 closes https://github.com/official-stockfish/Stockfish/pull/7239 No functional change Co-authored-by: Robert Nurnberg <28635489+robertnurnberg@users.noreply.github.com> Co-authored-by: Noah Lee <noahjlee314@gmail.com>
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