Dev Builds » 20260415-1830

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 06:40:58 582990 4000 1752 370 1878 +125.19 ± 4.71 1 38 581 1338 42 +282.0 ± 14.12
ncm-dbt-02 06:40:21 586204 4000 1734 367 1899 +123.71 ± 4.6 1 36 588 1345 30 +281.05 ± 14.03
ncm-dbt-03 06:40:52 583908 3998 1737 356 1905 +125.16 ± 4.56 0 32 587 1347 33 +284.43 ± 14.03
ncm-dbt-04 06:41:08 568141 4002 1750 350 1902 +126.9 ± 4.44 0 22 587 1362 30 +291.09 ± 13.99
ncm-dbt-05 06:40:23 580952 4000 1778 360 1862 +128.75 ± 4.57 0 33 552 1379 36 +295.27 ± 14.49
20000 8751 1803 9446 +125.94 ± 2.05 2 161 2895 6771 171 +286.71 ± 6.31

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
464341 ncm-dbt-04 566888 2 1 0 1 +189.7 ± 55.98 0 0 0 1 0 +1129.65 ± 376.02
464340 ncm-dbt-03 584201 498 207 52 239 +111.85 ± 12.9 0 5 86 156 2 +248.78 ± 36.78
464339 ncm-dbt-05 573406 500 217 43 240 +126.17 ± 12.87 0 5 69 173 3 +290.66 ± 41.43
464338 ncm-dbt-01 583572 500 214 37 249 +128.55 ± 13.56 0 7 64 174 5 +293.29 ± 43.07
464337 ncm-dbt-02 586562 500 212 37 251 +126.97 ± 11.88 0 3 69 178 0 +301.33 ± 41.33
464336 ncm-dbt-04 568275 500 224 40 236 +134.15 ± 12.67 0 3 65 177 5 +312.48 ± 42.67
464335 ncm-dbt-05 581028 500 227 50 223 +128.55 ± 12.24 0 2 72 173 3 +298.62 ± 40.29
464334 ncm-dbt-03 585211 500 218 40 242 +129.35 ± 12.61 0 2 73 170 5 +295.94 ± 39.99
464333 ncm-dbt-01 583112 500 214 46 240 +121.46 ± 13.84 1 4 77 162 6 +270.57 ± 39.07
464332 ncm-dbt-02 585169 500 216 38 246 +129.35 ± 12.99 0 4 69 172 5 +295.94 ± 41.39
464331 ncm-dbt-04 570388 500 217 40 243 +128.55 ± 12.24 0 1 75 170 4 +295.94 ± 39.27
464330 ncm-dbt-05 576455 500 220 44 236 +127.76 ± 13.21 0 6 66 174 4 +293.29 ± 42.41
464329 ncm-dbt-03 581194 500 220 54 226 +119.89 ± 12.98 0 4 80 162 4 +268.17 ± 38.21
464328 ncm-dbt-01 584664 500 228 46 226 +132.54 ± 13.1 0 4 66 174 6 +304.07 ± 42.38
464327 ncm-dbt-02 586139 500 228 53 219 +126.97 ± 13.22 0 4 73 167 6 +285.49 ± 40.16
464326 ncm-dbt-04 566888 500 219 42 239 +128.55 ± 12.04 0 1 74 172 3 +298.62 ± 39.56
464325 ncm-dbt-05 585506 500 222 45 233 +128.55 ± 13.01 0 4 70 171 5 +293.29 ± 41.07
464324 ncm-dbt-03 586223 500 232 49 219 +133.34 ± 13.26 0 3 69 170 8 +301.33 ± 41.33
464323 ncm-dbt-01 581777 500 218 39 243 +130.14 ± 12.59 0 4 66 177 3 +304.07 ± 42.38
464322 ncm-dbt-02 586985 500 209 42 249 +120.67 ± 13.15 0 5 77 164 4 +270.57 ± 39.07
464321 ncm-dbt-04 566730 500 217 38 245 +130.14 ± 12.39 0 2 71 173 4 +301.33 ± 40.6
464320 ncm-dbt-05 580323 500 223 48 229 +126.97 ± 13.04 0 4 72 169 5 +288.06 ± 40.46
464319 ncm-dbt-03 583070 500 215 30 255 +134.95 ± 12.24 0 5 56 188 1 +327.18 ± 46.19
464318 ncm-dbt-01 581361 500 219 49 232 +123.02 ± 12.17 0 3 75 171 1 +285.49 ± 39.5
464317 ncm-dbt-04 567878 500 215 40 245 +126.97 ± 12.47 0 3 72 172 3 +293.29 ± 40.39
464316 ncm-dbt-02 584579 500 218 52 230 +119.89 ± 12.98 0 7 71 171 1 +275.45 ± 40.84
464315 ncm-dbt-05 584076 500 220 47 233 +125.38 ± 13.07 0 4 74 167 5 +282.94 ± 39.86
464314 ncm-dbt-03 581153 500 216 39 245 +128.55 ± 13.56 0 4 73 165 8 +285.49 ± 40.16
464313 ncm-dbt-01 581485 500 210 54 236 +112.14 ± 13.56 0 7 84 155 4 +245.2 ± 37.37
464312 ncm-dbt-04 567165 500 216 49 235 +120.67 ± 12.97 0 4 79 163 4 +270.57 ± 38.47
464311 ncm-dbt-02 588387 500 219 47 234 +124.6 ± 12.71 0 3 76 167 4 +282.94 ± 39.21
464310 ncm-dbt-05 581569 500 222 38 240 +134.15 ± 12.47 0 2 67 176 5 +312.48 ± 41.9
464309 ncm-dbt-03 583824 500 212 47 241 +119.11 ± 12.62 0 3 82 162 3 +268.17 ± 37.61
464308 ncm-dbt-01 582027 500 222 53 225 +122.24 ± 13.12 0 4 78 163 5 +273.0 ± 38.74
464307 ncm-dbt-02 587028 500 218 54 228 +118.33 ± 13.7 0 6 80 158 6 +258.75 ± 38.32
464306 ncm-dbt-04 568395 500 218 48 234 +123.02 ± 12.37 0 3 76 169 2 +282.94 ± 39.21
464305 ncm-dbt-05 585253 500 227 45 228 +132.54 ± 13.47 0 6 62 176 6 +304.07 ± 43.81
464304 ncm-dbt-03 586393 500 217 45 238 +124.6 ± 12.9 0 6 68 174 2 +288.06 ± 41.76
464303 ncm-dbt-04 570669 500 223 53 224 +123.02 ± 13.29 0 5 75 165 5 +275.45 ± 39.63
464302 ncm-dbt-01 585928 500 227 46 227 +131.74 ± 14.37 0 5 71 162 12 +285.49 ± 40.81
464301 ncm-dbt-02 584790 500 214 44 242 +123.02 ± 13.47 1 4 73 168 4 +280.42 ± 40.21

Commit

Commit ID 45711fceb478d6162399a5dcc2b7d6e825558a89
Author Disservin
Date 2026-04-15 18:30:00 UTC
Add PVMoves Struct Use a dedicated struct for keeping track of the pv moves. anematode pointed out that we can use the ValueList for this as well, left that open for a future patch. Passed Non Regression https://tests.stockfishchess.org/tests/view/69d399cfec2dc6794cf18376 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 267264 W: 68895 L: 68927 D: 129442 Ptnml(0-2): 790, 29238, 73566, 29290, 748 closes https://github.com/official-stockfish/Stockfish/pull/6726 No functional change
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