Dev Builds » 20200928-2022

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 06:42:45 584116 4000 273 1870 1857 -146.88 ± 4.86 104 1412 461 23 0 -335.28 ± 15.87
ncm-dbt-02 06:42:24 585692 4000 251 1908 1841 -153.13 ± 4.78 109 1458 414 19 0 -357.94 ± 16.76
ncm-dbt-03 06:44:07 584228 4000 232 1877 1891 -151.87 ± 4.68 96 1472 413 19 0 -358.37 ± 16.78
ncm-dbt-04 06:43:07 568653 4000 205 1902 1893 -157.34 ± 4.74 111 1496 372 21 0 -375.04 ± 17.7
ncm-dbt-05 06:42:35 581907 4000 246 1918 1836 -154.7 ± 4.72 106 1479 396 19 0 -365.88 ± 17.14
20000 1207 9475 9318 -152.77 ± 2.13 526 7317 2056 101 0 -358.11 ± 7.51

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
459323 ncm-dbt-03 585253 500 21 230 249 -154.7 ± 12.61 11 188 50 1 0 -374.11 ± 48.94
459322 ncm-dbt-02 585421 500 28 244 228 -160.64 ± 14.74 20 180 46 4 0 -366.78 ± 51.18
459321 ncm-dbt-04 570188 500 18 231 251 -158.08 ± 13.06 14 186 49 1 0 -377.87 ± 49.47
459320 ncm-dbt-05 582027 500 27 249 224 -165.79 ± 13.46 18 187 44 1 0 -397.72 ± 52.42
459319 ncm-dbt-01 584159 500 37 237 226 -147.19 ± 13.58 11 182 53 4 0 -342.85 ± 47.56
459318 ncm-dbt-03 583824 500 30 238 232 -153.86 ± 12.87 10 191 46 3 0 -374.11 ± 51.25
459317 ncm-dbt-02 587028 500 32 239 229 -153.02 ± 13.12 12 185 51 2 0 -363.2 ± 48.51
459316 ncm-dbt-01 585759 500 36 245 219 -154.7 ± 14.04 17 177 54 2 0 -352.8 ± 47.05
459315 ncm-dbt-04 568434 500 28 252 220 -167.53 ± 14.4 20 188 38 4 0 -397.72 ± 56.46
459314 ncm-dbt-05 576987 500 33 244 223 -156.39 ± 13.36 12 191 43 4 0 -377.87 ± 52.99
459313 ncm-dbt-03 584285 500 32 223 245 -139.81 ± 13.64 9 178 58 5 0 -321.19 ± 45.36
459312 ncm-dbt-02 586985 500 30 244 226 -158.93 ± 13.01 14 187 48 1 0 -381.7 ± 50.02
459311 ncm-dbt-01 583824 500 37 225 238 -137.37 ± 13.9 11 170 65 4 0 -306.84 ± 42.73
459310 ncm-dbt-05 585295 500 33 236 231 -149.68 ± 12.87 11 182 56 1 0 -352.8 ± 46.04
459309 ncm-dbt-04 568912 500 26 232 242 -152.18 ± 13.56 13 183 51 3 0 -356.21 ± 48.54
459308 ncm-dbt-03 584411 500 34 242 224 -153.86 ± 12.87 11 188 49 2 0 -370.41 ± 49.56
459307 ncm-dbt-02 587197 500 34 238 228 -150.51 ± 12.83 11 183 55 1 0 -356.21 ± 46.49
459306 ncm-dbt-01 584453 500 33 234 233 -148.02 ± 13.93 15 173 60 2 0 -333.32 ± 44.47
459305 ncm-dbt-05 579372 500 20 242 238 -165.79 ± 12.34 13 197 39 1 0 -419.61 ± 55.94
459304 ncm-dbt-04 568037 500 19 230 251 -156.39 ± 12.51 9 196 42 3 0 -389.56 ± 53.75
459303 ncm-dbt-03 583740 500 36 237 227 -148.02 ± 13.54 13 177 58 2 0 -339.63 ± 45.29
459302 ncm-dbt-02 583698 500 32 229 239 -144.71 ± 12.88 7 187 52 4 0 -346.12 ± 48.03
459301 ncm-dbt-01 588728 500 26 234 240 -153.86 ± 13.28 12 187 48 3 0 -366.78 ± 50.11
459300 ncm-dbt-05 583698 500 34 244 222 -155.54 ± 14.95 19 177 49 5 0 -349.43 ± 49.46
459299 ncm-dbt-04 567839 500 32 235 233 -149.68 ± 13.47 12 182 53 3 0 -349.43 ± 47.56
459298 ncm-dbt-02 585632 500 31 239 230 -153.86 ± 13.69 15 180 53 2 0 -356.21 ± 47.52
459297 ncm-dbt-03 583405 500 24 242 234 -162.35 ± 13.03 13 195 39 3 0 -401.92 ± 55.87
459296 ncm-dbt-01 582611 500 35 235 230 -147.19 ± 13.38 12 178 58 2 0 -339.63 ± 45.29
459295 ncm-dbt-05 584537 500 36 240 224 -150.51 ± 14.4 17 173 57 3 0 -336.46 ± 45.77
459294 ncm-dbt-04 569310 500 20 240 240 -164.07 ± 12.47 13 195 41 1 0 -410.58 ± 54.45
459293 ncm-dbt-02 584748 500 36 230 234 -142.25 ± 14.48 16 165 66 3 0 -309.64 ± 42.33
459292 ncm-dbt-05 581236 500 33 233 234 -147.19 ± 12.78 7 190 49 4 0 -356.21 ± 49.54
459291 ncm-dbt-03 583363 500 31 235 234 -150.51 ± 12.83 11 183 55 1 0 -356.21 ± 46.49
459290 ncm-dbt-04 568633 500 31 243 226 -157.23 ± 12.68 11 192 45 2 0 -385.59 ± 51.85
459289 ncm-dbt-01 583154 500 34 225 241 -139.81 ± 13.64 9 178 58 5 0 -321.19 ± 45.36
459288 ncm-dbt-02 584832 500 28 245 227 -161.49 ± 13.08 14 191 43 2 0 -393.6 ± 53.12
459287 ncm-dbt-04 567878 500 31 239 230 -153.86 ± 14.83 19 174 53 4 0 -342.85 ± 47.56
459286 ncm-dbt-03 585548 500 24 230 246 -152.18 ± 14.34 18 172 58 2 0 -339.63 ± 45.29
459285 ncm-dbt-01 580240 500 35 235 230 -147.19 ± 14.15 17 167 65 1 0 -324.17 ± 42.47
459284 ncm-dbt-05 582110 500 30 230 240 -147.19 ± 12.36 9 182 59 0 0 -349.43 ± 44.59

Commit

Commit ID a5e68d9b25539b86304a9fb26afc616dc8126a1c
Author Vizvezdenec
Date 2020-09-28 20:22:54 UTC
Adjust null move pruning constants Idea is that division by fraction of 2 is slightly faster than by other numbers so parameters are adjusted in a way that division in null move pruning depth reduction features dividing by 256 instead of dividing by 213. Other than this patch is almost non-functional - difference starts to exist by depth 133. passed STC https://tests.stockfishchess.org/tests/view/5f70dd943b22d6afa50693c5 LLR: 2.95 (-2.94,2.94) {-0.25,1.25} Total: 57048 W: 6616 L: 6392 D: 44040 Ptnml(0-2): 304, 4583, 18531, 4797, 309 passed LTC https://tests.stockfishchess.org/tests/view/5f7180db3b22d6afa506941f LLR: 2.95 (-2.94,2.94) {0.25,1.25} Total: 45960 W: 2419 L: 2229 D: 41312 Ptnml(0-2): 43, 1779, 19137, 1987, 34 closes https://github.com/official-stockfish/Stockfish/pull/3159 bench 3789924
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