Dev Builds » 20260110-1447

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 06:45:54 581251 4004 1732 394 1878 +120.74 ± 4.51 0 31 626 1321 24 +273.21 ± 13.56
ncm-dbt-02 06:44:08 586624 4000 1729 381 1890 +121.85 ± 4.49 2 29 606 1345 18 +279.17 ± 13.79
ncm-dbt-03 06:44:44 585340 4000 1732 337 1931 +126.47 ± 4.53 0 25 592 1346 37 +287.42 ± 13.94
ncm-dbt-04 06:46:25 567676 3996 1712 372 1912 +121.19 ± 4.69 0 40 616 1304 38 +270.36 ± 13.7
ncm-dbt-05 06:45:35 583879 4000 1730 391 1879 +120.97 ± 4.54 0 37 609 1332 22 +274.53 ± 13.77
20000 8635 1875 9490 +122.24 ± 2.04 2 162 3049 6648 139 +276.87 ± 6.14

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
449636 ncm-dbt-01 579951 4 1 0 3 +88.51 ± 137.63 0 0 1 1 0 +190.5 ± 634.21
449635 ncm-dbt-04 568395 496 208 56 232 +110.0 ± 12.94 0 6 85 156 1 +245.68 ± 37.08
449634 ncm-dbt-02 586012 500 227 60 213 +120.67 ± 12.02 0 1 83 164 2 +275.45 ± 37.11
449633 ncm-dbt-05 578424 500 215 56 229 +114.45 ± 13.21 0 7 79 162 2 +256.44 ± 38.62
449632 ncm-dbt-03 586139 500 216 37 247 +130.14 ± 12.59 0 4 66 177 3 +304.07 ± 42.38
449631 ncm-dbt-01 580655 500 216 41 243 +126.97 ± 12.66 0 6 64 179 1 +298.62 ± 43.1
449630 ncm-dbt-04 568196 500 203 39 258 +118.33 ± 13.0 0 5 79 163 3 +265.78 ± 38.54
449629 ncm-dbt-02 584201 500 213 55 232 +113.68 ± 13.38 1 5 81 161 2 +256.44 ± 38.07
449628 ncm-dbt-05 582444 500 217 51 232 +119.89 ± 14.35 0 13 61 173 3 +270.57 ± 43.61
449627 ncm-dbt-03 581569 500 210 42 248 +121.45 ± 13.14 0 5 76 165 4 +273.0 ± 39.35
449626 ncm-dbt-01 581485 500 204 44 252 +115.22 ± 12.3 0 3 85 161 1 +261.07 ± 36.86
449625 ncm-dbt-04 567680 500 208 45 247 +117.55 ± 13.0 0 3 86 156 5 +258.75 ± 36.62
449624 ncm-dbt-02 586943 500 213 37 250 +127.76 ± 12.45 0 3 71 173 3 +295.94 ± 40.69
449623 ncm-dbt-05 584706 500 217 54 229 +117.55 ± 12.08 0 2 84 163 1 +268.17 ± 36.99
449622 ncm-dbt-03 585211 500 225 43 232 +132.54 ± 12.71 0 1 73 169 7 +301.33 ± 39.86
449621 ncm-dbt-01 582569 500 214 57 229 +112.91 ± 13.04 0 4 89 153 4 +247.41 ± 36.02
449620 ncm-dbt-04 568633 500 221 47 232 +126.17 ± 13.6 0 6 70 168 6 +282.94 ± 41.13
449619 ncm-dbt-02 589411 500 214 40 246 +126.17 ± 12.3 0 3 72 173 2 +293.29 ± 40.39
449618 ncm-dbt-05 581569 500 222 49 229 +125.38 ± 12.51 0 3 74 170 3 +288.06 ± 39.79
449617 ncm-dbt-03 585464 500 205 33 262 +124.6 ± 13.27 0 5 73 167 5 +280.42 ± 40.21
449616 ncm-dbt-01 582987 500 224 55 221 +122.24 ± 12.76 0 6 70 173 1 +282.94 ± 41.13
449615 ncm-dbt-04 567363 500 214 47 239 +120.67 ± 13.15 0 5 77 164 4 +270.57 ± 39.07
449614 ncm-dbt-02 584916 500 218 37 245 +131.74 ± 12.34 0 4 63 181 2 +312.48 ± 43.44
449613 ncm-dbt-05 580075 500 212 53 235 +114.45 ± 12.49 0 2 90 155 3 +254.16 ± 35.58
449612 ncm-dbt-01 580613 500 217 46 237 +123.81 ± 13.1 0 6 70 171 3 +282.94 ± 41.13
449611 ncm-dbt-03 585590 500 214 43 243 +123.81 ± 12.73 0 1 83 160 6 +275.45 ± 37.11
449610 ncm-dbt-02 587113 500 215 49 236 +119.89 ± 13.16 1 3 78 165 3 +273.0 ± 38.74
449609 ncm-dbt-04 566296 500 223 51 226 +124.6 ± 13.45 0 5 74 165 6 +277.93 ± 39.92
449608 ncm-dbt-03 586266 500 223 49 228 +126.17 ± 12.49 0 3 73 171 3 +290.66 ± 40.08
449607 ncm-dbt-05 581402 500 223 44 233 +130.14 ± 12.39 0 2 71 173 4 +301.33 ± 40.6
449606 ncm-dbt-01 582152 500 218 42 240 +127.76 ± 12.06 0 2 72 174 2 +298.62 ± 40.29
449605 ncm-dbt-02 585674 500 210 57 233 +109.83 ± 13.4 0 9 80 160 1 +245.2 ± 38.39
449604 ncm-dbt-04 567363 500 217 39 244 +129.35 ± 13.72 0 6 67 170 7 +290.66 ± 42.08
449603 ncm-dbt-05 582652 500 215 43 242 +124.6 ± 12.14 0 1 79 167 3 +285.49 ± 38.15
449602 ncm-dbt-01 580199 500 224 56 220 +121.45 ± 12.77 0 1 86 157 6 +268.17 ± 36.37
449601 ncm-dbt-03 583070 500 222 44 234 +129.35 ± 13.36 0 5 68 171 6 +293.29 ± 41.75
449600 ncm-dbt-02 588728 500 219 46 235 +125.38 ± 12.12 0 1 78 168 3 +288.06 ± 38.42
449599 ncm-dbt-05 599760 500 209 41 250 +121.45 ± 13.31 0 7 71 169 3 +275.45 ± 40.84
449598 ncm-dbt-04 567482 500 218 48 234 +123.02 ± 13.29 0 4 78 162 6 +273.0 ± 38.74
449597 ncm-dbt-03 589411 500 217 46 237 +123.81 ± 12.16 0 1 80 166 3 +282.94 ± 37.88
449596 ncm-dbt-01 580655 500 214 53 233 +116.0 ± 13.2 0 3 89 152 6 +251.89 ± 35.92

Commit

Commit ID 9b8c5c9f7550f3981d7902028e72e8d63cb47570
Author FauziAkram
Date 2026-01-10 14:47:11 UTC
Simplify fail high reduction formula Passed STC: LLR: 2.97 (-2.94,2.94) <-1.75,0.25> Total: 165792 W: 42849 L: 42768 D: 80175 Ptnml(0-2): 512, 19499, 42800, 19566, 519 https://tests.stockfishchess.org/tests/view/695cdd95912b7ff140de60c2 Passed LTC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 80448 W: 20619 L: 20459 D: 39370 Ptnml(0-2): 47, 8693, 22596, 8829, 59 https://tests.stockfishchess.org/tests/view/695f7e84ca95f52e4b852536 closes https://github.com/official-stockfish/Stockfish/pull/6535 bench: 2050811
Copyright 2011–2026 Next Chess Move LLC