Dev Builds » 20201223-1920

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 06:51:20 584016 4000 287 1830 1883 -141.34 ± 4.86 85 1407 474 34 0 -321.93 ± 15.67
ncm-dbt-02 06:51:29 586241 4000 284 1850 1866 -143.69 ± 4.98 102 1396 469 32 1 -324.54 ± 15.75
ncm-dbt-03 06:52:45 585275 3994 321 1804 1869 -135.48 ± 5.1 95 1339 517 46 0 -297.98 ± 15.0
ncm-dbt-04 06:51:51 568024 4006 309 1857 1840 -141.61 ± 4.96 106 1362 509 26 0 -315.29 ± 15.09
ncm-dbt-05 06:52:04 581855 4000 303 1822 1875 -138.89 ± 5.03 98 1362 501 39 0 -308.59 ± 15.24
20000 1504 9163 9333 -140.19 ± 2.23 486 6866 2470 177 1 -313.48 ± 6.85

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
457982 ncm-dbt-04 567324 6 0 2 4 -120.22 ± 109.7 0 2 1 0 0 -279.24 ± 576.89
457981 ncm-dbt-03 586308 494 43 220 231 -130.26 ± 14.35 12 157 74 4 0 -280.43 ± 39.85
457980 ncm-dbt-02 585421 500 38 230 232 -140.62 ± 13.8 9 179 58 3 1 -327.18 ± 45.37
457979 ncm-dbt-05 581153 500 38 238 224 -147.19 ± 15.05 15 178 49 8 0 -330.23 ± 49.05
457978 ncm-dbt-01 584537 500 38 232 230 -142.25 ± 14.12 13 172 61 4 0 -318.25 ± 44.18
457977 ncm-dbt-04 568792 500 34 228 238 -142.25 ± 13.75 11 176 59 4 0 -324.17 ± 44.97
457976 ncm-dbt-03 586308 500 30 228 242 -145.54 ± 13.83 10 184 50 6 0 -339.63 ± 48.85
457975 ncm-dbt-02 587282 500 38 228 234 -138.99 ± 13.85 10 175 60 5 0 -315.35 ± 44.57
457974 ncm-dbt-05 584916 500 38 230 232 -140.62 ± 14.53 13 172 59 6 0 -312.48 ± 44.93
457973 ncm-dbt-01 582736 500 38 231 231 -141.44 ± 13.96 10 179 55 6 0 -324.17 ± 46.56
457972 ncm-dbt-04 567403 500 38 237 225 -146.36 ± 13.61 14 172 63 1 0 -330.23 ± 43.2
457971 ncm-dbt-03 583782 500 45 217 238 -124.6 ± 14.47 10 159 74 7 0 -268.17 ± 39.97
457970 ncm-dbt-02 584285 500 43 241 216 -145.54 ± 14.39 14 175 56 5 0 -327.18 ± 46.19
457969 ncm-dbt-01 580572 500 37 226 237 -138.18 ± 14.93 13 171 58 8 0 -304.07 ± 45.19
457968 ncm-dbt-05 578959 500 29 219 252 -138.99 ± 14.03 11 173 61 5 0 -312.48 ± 44.19
457967 ncm-dbt-04 570589 500 39 246 215 -153.02 ± 15.04 23 162 64 1 0 -327.18 ± 42.83
457966 ncm-dbt-03 584117 500 38 225 237 -136.56 ± 14.45 12 169 63 6 0 -301.33 ± 43.45
457965 ncm-dbt-02 587155 500 27 225 248 -145.54 ± 13.05 11 177 61 1 0 -336.46 ± 43.96
457964 ncm-dbt-01 585464 500 33 224 243 -139.81 ± 12.67 7 179 62 2 0 -327.18 ± 43.69
457963 ncm-dbt-04 567086 500 37 220 243 -133.34 ± 14.17 9 172 62 7 0 -298.62 ± 43.77
457962 ncm-dbt-05 582652 500 45 225 230 -130.94 ± 14.22 9 169 65 7 0 -290.66 ± 42.73
457961 ncm-dbt-02 585928 500 31 243 226 -157.23 ± 13.93 17 180 51 2 0 -363.2 ± 48.51
457960 ncm-dbt-03 585843 500 43 233 224 -138.99 ± 13.85 10 175 60 5 0 -315.35 ± 44.57
457959 ncm-dbt-01 584117 500 42 226 232 -134.15 ± 13.43 7 175 63 5 0 -306.84 ± 43.45
457958 ncm-dbt-05 576864 500 34 223 243 -138.18 ± 13.69 11 170 66 3 0 -309.64 ± 42.33
457957 ncm-dbt-04 564997 500 43 231 226 -137.37 ± 13.71 11 169 67 3 0 -306.84 ± 41.99
457956 ncm-dbt-02 587282 500 28 227 245 -146.36 ± 13.8 11 182 52 5 0 -339.63 ± 47.98
457955 ncm-dbt-03 585759 500 44 227 229 -133.34 ± 15.02 14 162 67 7 0 -285.49 ± 42.08
457954 ncm-dbt-01 584748 500 26 222 252 -143.89 ± 13.51 8 186 50 6 0 -339.63 ± 48.85
457953 ncm-dbt-05 584411 500 36 224 240 -137.37 ± 13.9 12 167 68 3 0 -304.07 ± 41.65
457952 ncm-dbt-04 569549 500 43 227 230 -134.15 ± 14.5 14 160 72 4 0 -288.06 ± 40.46
457951 ncm-dbt-02 584790 500 43 223 234 -130.94 ± 15.38 15 158 69 8 0 -275.45 ± 41.43
457950 ncm-dbt-04 569390 500 42 239 219 -144.71 ± 14.23 15 170 62 3 0 -321.19 ± 43.77
457949 ncm-dbt-01 585084 500 41 235 224 -142.25 ± 12.58 8 179 62 1 0 -333.32 ± 43.57
457948 ncm-dbt-05 582235 500 44 228 228 -134.15 ± 15.01 18 151 78 3 0 -277.93 ± 38.66
457947 ncm-dbt-03 585253 500 37 230 233 -141.44 ± 14.15 14 168 65 3 0 -312.48 ± 42.67
457946 ncm-dbt-02 587792 500 36 233 231 -144.71 ± 14.23 15 170 62 3 0 -321.19 ± 43.77
457945 ncm-dbt-01 584874 500 32 234 234 -148.85 ± 14.64 19 166 63 2 0 -324.17 ± 43.32
457944 ncm-dbt-04 567086 500 33 227 240 -142.25 ± 13.18 9 179 59 3 0 -330.23 ± 44.94
457943 ncm-dbt-03 584832 500 41 224 235 -133.34 ± 15.02 13 165 64 8 0 -288.06 ± 43.03
457942 ncm-dbt-05 583656 500 39 235 226 -143.89 ± 13.31 9 182 55 4 0 -336.46 ± 46.65

Commit

Commit ID b06ef36ae5f23fa2d4188c9fe6d95c4f551ab035
Author Moez Jellouli
Date 2020-12-23 19:20:24 UTC
Correct Outflanking calculations in classical eval Take signed value of rank difference between kings squares instead absolute value in outflanking calculation. This change correct evaluation of endgames with one king invading opponent last ranks. Passed STC: LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 122240 W: 24326 L: 23896 D: 74018 Ptnml(0-2): 2101, 14139, 28236, 14517, 2127 https://tests.stockfishchess.org/tests/view/5fdfc33a3932f79192d394b8 Passed LTC: LLR: 2.97 (-2.94,2.94) {0.25,1.25} Total: 157416 W: 20870 L: 20292 D: 116254 Ptnml(0-2): 973, 13954, 48333, 14418, 1030 https://tests.stockfishchess.org/tests/view/5fe07a453932f79192d39502 closes https://github.com/official-stockfish/Stockfish/pull/3271 Bench: 4162769
Copyright 2011–2026 Next Chess Move LLC