Dev Builds » 20260409-1956

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 06:44:03 583333 3992 1765 336 1891 +130.13 ± 4.46 0 26 546 1393 31 +301.6 ± 14.55
ncm-dbt-02 06:45:13 585489 4008 1737 370 1901 +123.44 ± 4.46 1 27 602 1352 22 +282.73 ± 13.83
ncm-dbt-03 06:44:46 584419 4000 1731 369 1900 +123.22 ± 4.49 1 23 618 1329 29 +279.8 ± 13.62
ncm-dbt-04 06:45:36 567034 4002 1772 364 1866 +127.69 ± 4.48 1 26 567 1378 29 +294.38 ± 14.27
ncm-dbt-05 06:45:49 582288 3998 1748 363 1887 +125.55 ± 4.5 1 31 572 1372 23 +289.26 ± 14.22
20000 8753 1802 9445 +126.0 ± 2.0 4 133 2905 6824 134 +289.42 ± 6.3

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
463483 ncm-dbt-04 567244 2 1 0 1 +189.7 ± 55.98 0 0 0 1 0 +1129.65 ± 376.02
463482 ncm-dbt-02 584622 8 4 0 4 +190.56 ± 13.88 0 0 0 4 0 +1199.83 ± 250.99
463481 ncm-dbt-01 581943 492 218 50 224 +123.6 ± 13.24 0 5 72 165 4 +279.59 ± 40.49
463480 ncm-dbt-03 582736 500 214 44 242 +123.02 ± 12.37 0 3 76 169 2 +282.94 ± 39.21
463479 ncm-dbt-05 583112 498 216 40 242 +128.32 ± 13.41 0 7 63 175 4 +295.12 ± 43.42
463478 ncm-dbt-02 587070 500 230 41 229 +138.18 ± 12.33 0 2 62 181 5 +327.18 ± 43.69
463477 ncm-dbt-04 566888 500 221 46 233 +126.97 ± 12.66 0 5 67 176 2 +295.94 ± 42.08
463476 ncm-dbt-01 583866 500 225 42 233 +133.34 ± 12.09 0 2 66 179 3 +315.35 ± 42.24
463475 ncm-dbt-03 583405 500 216 43 241 +125.38 ± 12.32 0 2 76 169 3 +288.06 ± 39.11
463474 ncm-dbt-05 582694 500 230 38 232 +140.62 ± 13.8 0 5 58 177 10 +321.19 ± 45.36
463473 ncm-dbt-02 587452 500 210 46 244 +118.33 ± 12.26 0 3 81 165 1 +270.57 ± 37.86
463472 ncm-dbt-04 565705 500 221 40 239 +131.74 ± 11.94 0 2 67 179 2 +312.48 ± 41.9
463471 ncm-dbt-01 583824 500 227 46 227 +131.74 ± 12.34 0 2 69 175 4 +306.84 ± 41.23
463470 ncm-dbt-03 584622 500 226 47 227 +130.14 ± 11.99 0 1 72 174 3 +304.07 ± 40.16
463469 ncm-dbt-05 580282 500 213 37 250 +127.76 ± 13.02 0 6 65 176 3 +295.94 ± 42.75
463468 ncm-dbt-02 585211 500 216 51 233 +119.11 ± 12.62 0 3 82 162 3 +268.17 ± 37.61
463467 ncm-dbt-04 567007 500 226 46 228 +130.94 ± 13.86 1 4 66 172 7 +298.62 ± 42.41
463466 ncm-dbt-01 583698 500 212 43 245 +122.24 ± 12.57 0 2 81 163 4 +275.45 ± 37.75
463465 ncm-dbt-03 585928 500 219 38 243 +131.74 ± 13.3 0 4 68 171 7 +298.62 ± 41.71
463464 ncm-dbt-02 585337 500 211 41 248 +123.02 ± 11.98 0 3 74 173 0 +288.06 ± 39.79
463463 ncm-dbt-05 584537 500 216 45 239 +123.81 ± 12.54 0 5 70 174 1 +288.06 ± 41.11
463462 ncm-dbt-04 567601 500 216 50 234 +119.89 ± 12.42 0 5 74 171 0 +277.93 ± 39.92
463461 ncm-dbt-01 583112 500 219 35 246 +134.15 ± 12.47 0 4 61 182 3 +318.25 ± 44.18
463460 ncm-dbt-03 585126 500 209 51 240 +113.68 ± 12.86 0 4 87 156 3 +251.89 ± 36.48
463459 ncm-dbt-02 585464 500 215 41 244 +126.18 ± 11.7 0 2 72 176 0 +298.62 ± 40.29
463458 ncm-dbt-05 580655 500 218 51 231 +120.67 ± 11.62 0 1 81 168 0 +280.42 ± 37.62
463457 ncm-dbt-04 567126 500 227 41 232 +135.76 ± 12.81 0 3 64 177 6 +315.35 ± 43.03
463456 ncm-dbt-01 585464 500 212 46 242 +119.89 ± 13.33 0 5 79 161 5 +265.78 ± 38.54
463455 ncm-dbt-02 585632 500 209 46 245 +117.55 ± 13.0 0 7 74 168 1 +268.17 ± 39.97
463454 ncm-dbt-03 583824 500 217 54 229 +117.55 ± 13.36 1 4 79 163 3 +265.78 ± 38.54
463453 ncm-dbt-05 585970 500 218 52 230 +119.89 ± 12.79 1 4 73 172 0 +280.42 ± 40.21
463452 ncm-dbt-04 566020 500 215 46 239 +122.24 ± 11.99 0 2 78 169 1 +282.94 ± 38.55
463451 ncm-dbt-01 582694 500 226 29 245 +144.71 ± 12.26 0 3 52 190 5 +352.8 ± 48.05
463450 ncm-dbt-02 583992 500 223 50 227 +125.38 ± 13.25 0 4 75 165 6 +280.42 ± 39.57
463449 ncm-dbt-03 586731 500 208 51 241 +112.91 ± 12.69 0 4 87 157 2 +251.89 ± 36.48
463448 ncm-dbt-05 577192 500 214 47 239 +120.67 ± 12.02 0 2 80 167 1 +277.93 ± 38.02
463447 ncm-dbt-04 567522 500 224 54 222 +123.02 ± 12.56 0 1 83 161 5 +275.45 ± 37.11
463446 ncm-dbt-01 582068 500 226 45 229 +131.74 ± 12.34 0 3 66 178 3 +309.64 ± 42.33
463445 ncm-dbt-03 582987 500 222 41 237 +131.74 ± 12.54 0 1 73 170 6 +301.33 ± 39.86
463444 ncm-dbt-05 583866 500 223 53 224 +123.02 ± 12.37 0 1 82 163 4 +277.93 ± 37.36
463443 ncm-dbt-02 584622 500 219 54 227 +119.11 ± 13.69 1 3 82 158 6 +263.42 ± 37.69
463442 ncm-dbt-04 568196 500 221 41 238 +130.94 ± 13.14 0 4 68 172 6 +298.62 ± 41.71

Commit

Commit ID 5ae13d2bd4bfae21250fc100e4f4287f1e295b79
Author FauziAkram
Date 2026-04-09 19:56:05 UTC
Remove Redundant Branchless Execution Passed STC non-reg: LLR: 2.93 (-2.94,2.94) <-1.75,0.25> Total: 102272 W: 26553 L: 26411 D: 49308 Ptnml(0-2): 269, 11212, 28036, 11346, 273 https://tests.stockfishchess.org/tests/view/69d0f1c5e2b443cb2670b710 closes https://github.com/official-stockfish/Stockfish/pull/6707 No functional change
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