Dev Builds » 20251114-1638

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 06:45:21 582131 4000 1658 425 1917 +110.7 ± 4.76 0 59 673 1244 24 +243.28 ± 13.11
ncm-dbt-02 06:44:41 585256 4000 1689 421 1890 +114.07 ± 4.65 1 42 670 1262 25 +253.02 ± 13.11
ncm-dbt-03 06:44:41 584340 4000 1687 408 1905 +115.13 ± 4.67 0 43 665 1262 30 +254.44 ± 13.16
ncm-dbt-04 06:43:07 567643 4000 1699 452 1849 +112.04 ± 4.68 0 45 691 1236 28 +246.03 ± 12.9
ncm-dbt-05 06:45:13 583863 4000 1703 385 1912 +118.92 ± 4.64 0 41 630 1299 30 +265.78 ± 13.54
20000 8436 2091 9473 +114.16 ± 2.09 1 230 3329 6303 137 +252.4 ± 5.88

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
440909 ncm-dbt-01 584159 500 209 59 232 +107.54 ± 14.37 0 8 92 142 8 +223.94 ± 35.61
440908 ncm-dbt-05 580904 500 208 62 230 +104.49 ± 13.55 0 7 94 145 4 +223.94 ± 35.14
440907 ncm-dbt-03 583531 500 202 46 252 +112.14 ± 13.22 0 6 85 156 3 +247.41 ± 37.09
440906 ncm-dbt-02 587028 500 216 50 234 +119.89 ± 12.04 0 2 81 166 1 +275.45 ± 37.75
440905 ncm-dbt-04 568196 500 214 57 229 +112.91 ± 12.69 0 3 90 154 3 +249.64 ± 35.69
440904 ncm-dbt-01 582569 500 205 55 240 +107.54 ± 13.06 0 7 87 155 1 +238.66 ± 36.67
440903 ncm-dbt-03 586985 500 214 50 236 +118.33 ± 13.52 0 6 79 160 5 +261.07 ± 38.58
440902 ncm-dbt-05 584159 500 207 43 250 +118.33 ± 13.86 0 8 75 162 5 +261.07 ± 39.69
440901 ncm-dbt-02 585717 500 209 48 243 +116.0 ± 13.71 0 9 74 164 3 +258.75 ± 39.96
440900 ncm-dbt-04 566612 500 217 53 230 +118.33 ± 13.0 0 5 79 163 3 +265.78 ± 38.54
440899 ncm-dbt-01 582987 500 205 58 237 +105.25 ± 13.22 0 7 91 150 2 +230.16 ± 35.78
440898 ncm-dbt-02 583572 500 204 48 248 +112.14 ± 13.22 0 5 88 153 4 +245.2 ± 36.32
440897 ncm-dbt-05 584034 500 218 46 236 +124.6 ± 12.53 0 1 81 163 5 +280.42 ± 37.62
440896 ncm-dbt-03 582778 500 223 55 222 +121.45 ± 13.66 0 7 73 165 5 +270.57 ± 40.25
440895 ncm-dbt-04 568196 500 225 61 214 +118.33 ± 13.17 0 4 83 158 5 +261.07 ± 37.44
440894 ncm-dbt-01 582694 500 203 52 245 +108.3 ± 13.23 0 7 87 154 2 +238.66 ± 36.67
440893 ncm-dbt-05 582027 500 204 45 251 +114.45 ± 13.38 0 8 77 163 2 +256.44 ± 39.15
440892 ncm-dbt-02 586012 500 212 47 241 +119.11 ± 13.17 0 7 73 168 2 +270.57 ± 40.25
440891 ncm-dbt-03 586223 500 210 47 243 +117.55 ± 12.82 0 3 85 158 4 +261.07 ± 36.86
440890 ncm-dbt-04 566414 500 205 56 239 +106.77 ± 13.72 0 9 86 152 3 +232.26 ± 36.96
440889 ncm-dbt-01 582611 500 211 40 249 +123.81 ± 13.28 0 4 77 163 6 +275.45 ± 39.01
440888 ncm-dbt-05 586097 500 220 51 229 +122.24 ± 12.94 0 4 77 165 4 +275.45 ± 39.01
440887 ncm-dbt-02 585843 500 204 59 237 +103.73 ± 13.38 1 5 94 148 2 +228.08 ± 35.08
440886 ncm-dbt-04 570068 500 226 64 210 +116.77 ± 14.37 0 8 80 154 8 +249.64 ± 38.38
440885 ncm-dbt-03 584369 500 214 58 228 +112.14 ± 13.22 0 5 88 153 4 +245.2 ± 36.32
440884 ncm-dbt-01 577643 500 201 53 246 +106.01 ± 13.39 0 9 85 155 1 +234.38 ± 37.19
440883 ncm-dbt-05 584327 500 210 46 244 +118.33 ± 12.81 0 5 78 165 2 +268.17 ± 38.8
440882 ncm-dbt-02 585674 500 219 60 221 +114.45 ± 12.67 0 3 88 156 3 +254.16 ± 36.15
440881 ncm-dbt-04 566296 500 209 52 239 +112.91 ± 13.04 0 5 86 156 3 +249.64 ± 36.79
440880 ncm-dbt-03 580199 500 210 48 242 +116.77 ± 12.65 0 4 82 162 2 +263.42 ± 37.69
440879 ncm-dbt-02 582485 500 217 56 227 +116.0 ± 13.88 0 7 81 156 6 +251.89 ± 38.11
440878 ncm-dbt-01 582694 500 211 51 238 +115.22 ± 13.2 0 8 75 166 1 +261.07 ± 39.69
440877 ncm-dbt-04 568355 500 200 50 250 +107.54 ± 13.23 0 7 88 153 2 +236.51 ± 36.44
440876 ncm-dbt-05 581777 500 216 44 240 +124.6 ± 12.53 0 2 78 166 4 +282.94 ± 38.55
440875 ncm-dbt-03 584159 500 208 51 241 +112.91 ± 12.69 0 5 84 160 1 +254.16 ± 37.27
440874 ncm-dbt-04 567007 500 203 59 238 +102.97 ± 12.53 0 4 99 146 1 +226.0 ± 33.89
440873 ncm-dbt-01 581693 500 213 57 230 +112.14 ± 13.73 0 9 79 159 3 +247.41 ± 38.64
440872 ncm-dbt-03 586477 500 206 53 241 +109.83 ± 13.89 0 7 89 148 6 +234.38 ± 36.22
440871 ncm-dbt-05 587579 500 220 48 232 +124.6 ± 13.27 0 6 70 170 4 +282.94 ± 41.13
440870 ncm-dbt-02 585717 500 208 53 239 +111.37 ± 13.05 0 4 91 151 4 +243.0 ± 35.57

Commit

Commit ID 4b71d8e20293bdc5db5dbb07ae75f3ef65497642
Author Robert Nurnberg
Date 2025-11-14 16:38:55 UTC
Allow time checking after each DTZ probe This PR allows for time checking within Tablebases::rank_root_moves(). The principal application for now is syzygy_extend_pv(). In the past, Stockfish suffered some time losses at e.g. TCEC when the HDD with the DTZ tables was too slow for the chosen move overhead setting, see #5894. ``` > ./fastchess -engine name="patch" cmd=./stockfish.patch -engine name="master" cmd=./stockfish.master -each tc=10+0.1 option.SyzygyPath=/disk1/syzygy/3-4-5-6/WDL:/disk2/syzygy/3-4-5-6/DTZ -draw movenumber=34 movecount=8 score=20 -openings file=UHO_Lichess_4852_v1.epd format=epd -rounds 50 -repeat -concurrency 16 ... Results of patch vs master (10+0.1, 1t, 16MB, UHO_Lichess_4852_v1.epd): Elo: 59.64 +/- 35.35, nElo: 117.61 +/- 68.10 LOS: 99.96 %, DrawRatio: 56.00 %, PairsRatio: 4.50 Games: 100, Wins: 34, Losses: 17, Draws: 49, Points: 58.5 (58.50 %) Ptnml(0-2): [0, 4, 28, 15, 3], WL/DD Ratio: 0.87 -------------------------------------------------- Player: master Timeouts: 19 Crashed: 0 Finished match ``` closes https://github.com/official-stockfish/Stockfish/pull/6422 No functional change
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