Dev Builds » 20260510-0944

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 06:41:12 582184 4000 1779 333 1888 +131.54 ± 4.45 0 21 549 1393 37 +304.42 ± 14.49
ncm-dbt-02 06:40:48 585813 4000 1765 331 1904 +130.34 ± 4.39 0 23 546 1405 26 +304.07 ± 14.54
ncm-dbt-03 06:41:40 584353 4008 1792 336 1880 +132.25 ± 4.48 0 20 551 1390 43 +304.82 ± 14.46
ncm-dbt-04 06:40:57 567133 4000 1767 344 1889 +129.25 ± 4.48 0 24 564 1377 35 +297.28 ± 14.3
ncm-dbt-05 06:42:08 584511 3992 1757 321 1914 +130.83 ± 4.51 0 27 542 1391 36 +302.29 ± 14.61
20000 8860 1665 9475 +130.84 ± 2.0 0 115 2752 6956 177 +302.56 ± 6.47

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
468746 ncm-dbt-03 583447 8 4 0 4 +190.56 ± 13.88 0 0 0 4 0 +1199.83 ± 250.99
468745 ncm-dbt-05 580406 492 223 37 232 +138.2 ± 12.86 0 3 60 177 6 +323.95 ± 44.53
468744 ncm-dbt-01 582110 500 218 42 240 +127.76 ± 13.02 0 4 71 170 5 +290.66 ± 40.76
468743 ncm-dbt-04 568514 500 214 34 252 +130.94 ± 13.14 0 5 65 175 5 +301.33 ± 42.75
468742 ncm-dbt-02 583866 500 214 49 237 +119.11 ± 12.43 0 4 78 167 1 +273.0 ± 38.74
468741 ncm-dbt-03 585084 500 224 44 232 +130.94 ± 14.04 0 6 67 168 9 +290.66 ± 42.08
468740 ncm-dbt-05 586858 500 212 50 238 +116.77 ± 13.01 0 6 78 164 2 +263.42 ± 38.85
468739 ncm-dbt-01 584369 500 224 34 242 +138.99 ± 11.88 0 2 59 186 3 +336.46 ± 44.87
468738 ncm-dbt-04 567007 500 210 41 249 +122.24 ± 12.38 0 2 80 165 3 +277.93 ± 38.02
468737 ncm-dbt-02 585674 500 223 42 235 +131.74 ± 12.34 0 3 66 178 3 +309.64 ± 42.33
468736 ncm-dbt-03 583866 500 224 32 244 +140.62 ± 12.64 0 2 61 180 7 +330.23 ± 44.08
468735 ncm-dbt-05 581902 500 220 31 249 +138.18 ± 12.53 0 4 57 185 4 +330.23 ± 45.79
468734 ncm-dbt-01 579537 500 220 54 226 +119.89 ± 13.33 0 6 76 164 4 +268.17 ± 39.39
468733 ncm-dbt-04 566099 500 224 47 229 +128.55 ± 12.82 0 3 72 170 5 +293.29 ± 40.39
468732 ncm-dbt-02 586054 500 231 37 232 +142.25 ± 12.16 0 1 60 183 6 +339.63 ± 44.35
468731 ncm-dbt-03 584201 500 224 41 235 +133.34 ± 11.24 0 0 68 181 1 +321.18 ± 41.27
468730 ncm-dbt-01 579083 500 225 49 226 +127.76 ± 12.45 0 4 68 176 2 +298.62 ± 41.71
468729 ncm-dbt-05 581985 500 215 45 240 +123.02 ± 12.74 0 4 75 168 3 +280.42 ± 39.57
468728 ncm-dbt-04 567126 500 227 52 221 +126.97 ± 12.85 0 4 71 171 4 +290.66 ± 40.76
468727 ncm-dbt-02 585759 500 225 48 227 +128.55 ± 12.82 0 3 72 170 5 +293.29 ± 40.39
468726 ncm-dbt-03 586054 500 210 45 245 +119.11 ± 12.62 0 5 76 168 1 +273.0 ± 39.35
468725 ncm-dbt-01 585084 500 222 35 243 +136.56 ± 12.79 0 2 66 175 7 +315.35 ± 42.24
468724 ncm-dbt-05 584874 500 219 41 240 +129.35 ± 12.41 0 1 75 169 5 +295.94 ± 39.27
468723 ncm-dbt-02 585590 500 227 35 238 +140.62 ± 11.59 0 2 56 190 2 +346.12 ± 46.15
468722 ncm-dbt-04 565705 500 225 45 230 +130.94 ± 12.17 0 2 69 176 3 +306.84 ± 41.23
468721 ncm-dbt-03 583363 500 217 40 243 +128.55 ± 12.63 0 2 74 169 5 +293.29 ± 39.69
468720 ncm-dbt-01 581693 500 223 39 238 +134.14 ± 11.86 0 0 70 176 4 +315.34 ± 40.62
468719 ncm-dbt-05 581610 500 223 47 230 +127.76 ± 13.75 0 6 69 168 7 +285.49 ± 41.44
468718 ncm-dbt-02 585000 500 211 35 254 +127.76 ± 12.45 0 5 65 179 1 +301.33 ± 42.75
468717 ncm-dbt-03 586350 500 232 42 226 +138.99 ± 12.7 0 2 63 178 7 +324.17 ± 43.32
468716 ncm-dbt-04 565666 500 226 46 228 +130.94 ± 11.96 0 1 71 175 3 +306.84 ± 40.47
468715 ncm-dbt-01 581569 500 223 42 235 +131.74 ± 12.74 0 2 71 171 6 +301.33 ± 40.6
468714 ncm-dbt-02 587749 500 212 42 246 +123.02 ± 12.74 0 3 78 165 4 +277.93 ± 38.66
468713 ncm-dbt-04 567680 500 226 51 223 +126.97 ± 13.22 0 4 73 167 6 +285.49 ± 40.16
468712 ncm-dbt-05 581818 500 226 30 244 +143.89 ± 12.3 0 1 59 183 7 +342.85 ± 44.76
468711 ncm-dbt-03 584664 500 235 46 219 +138.18 ± 12.93 0 2 65 175 8 +318.25 ± 42.59
468710 ncm-dbt-01 584034 500 224 38 238 +135.76 ± 12.42 0 1 68 175 6 +315.35 ± 41.44
468709 ncm-dbt-05 596635 500 219 40 241 +130.14 ± 11.99 0 2 69 177 2 +306.84 ± 41.23
468708 ncm-dbt-04 569270 500 215 28 257 +136.56 ± 12.79 0 3 63 178 6 +318.25 ± 43.39
468707 ncm-dbt-03 582152 500 222 46 232 +127.76 ± 12.45 0 1 77 167 5 +290.66 ± 38.7
468706 ncm-dbt-02 586816 500 222 43 235 +130.14 ± 12.39 0 2 71 173 4 +301.33 ± 40.6

Commit

Commit ID ea48d382839ceb58fe615af468390a6fdc50adaa
Author Robert Nurnberg
Date 2026-05-10 09:44:38 UTC
remove simple eval No longer needed after the removal of smallnet. Also remove declaration of `use_smallnet()`. closes https://github.com/official-stockfish/Stockfish/pull/6799 No functional change
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