Dev Builds » 20201218-2017

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 06:51:43 582491 4012 328 1854 1830 -139.14 ± 5.1 107 1352 507 40 0 -306.41 ± 15.14
ncm-dbt-02 06:51:03 586908 4000 278 1849 1873 -144.2 ± 4.95 114 1363 503 20 0 -321.56 ± 15.17
ncm-dbt-03 06:51:02 586879 4014 285 1889 1840 -147.03 ± 4.99 117 1396 469 24 1 -331.31 ± 15.74
ncm-dbt-04 06:50:41 566599 4000 277 1835 1888 -142.87 ± 4.85 90 1408 472 30 0 -325.67 ± 15.7
ncm-dbt-05 06:52:17 582407 3974 266 1801 1907 -141.54 ± 4.87 85 1397 474 30 1 -322.86 ± 15.66
20000 1434 9228 9338 -142.95 ± 2.22 513 6916 2425 144 2 -321.41 ± 6.91

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
446344 ncm-dbt-03 585253 14 2 8 4 -159.03 ± 105.74 1 4 2 0 0 -311.09 ± 530.6
446343 ncm-dbt-01 583824 12 0 7 5 -231.68 ± 168.47 2 3 1 0 0 -416.21 ± 496.36
446342 ncm-dbt-05 582569 474 34 213 227 -138.03 ± 14.6 10 165 56 6 0 -310.41 ± 46.14
446341 ncm-dbt-02 586604 500 39 226 235 -136.56 ± 13.92 13 163 72 2 0 -298.62 ± 40.29
446340 ncm-dbt-04 565626 500 27 236 237 -154.7 ± 14.8 19 175 52 4 0 -346.12 ± 48.03
446339 ncm-dbt-01 581361 500 51 226 223 -126.97 ± 14.94 13 156 74 7 0 -268.17 ± 39.97
446338 ncm-dbt-03 588345 500 17 236 247 -163.2 ± 12.06 12 195 43 0 0 -410.57 ± 52.91
446337 ncm-dbt-05 585211 500 37 227 236 -138.99 ± 13.67 8 179 59 3 1 -324.17 ± 44.97
446336 ncm-dbt-02 586901 500 34 237 229 -149.68 ± 13.86 15 175 58 2 0 -339.63 ± 45.29
446335 ncm-dbt-04 568395 500 35 222 243 -136.56 ± 14.1 10 173 61 6 0 -306.84 ± 44.17
446334 ncm-dbt-01 583237 500 39 224 237 -134.95 ± 14.82 13 166 64 7 0 -293.29 ± 43.07
446333 ncm-dbt-03 586097 500 40 232 228 -140.62 ± 13.99 13 169 65 3 0 -312.48 ± 42.67
446332 ncm-dbt-05 579001 500 37 238 225 -148.02 ± 14.3 18 166 65 1 0 -324.17 ± 42.47
446331 ncm-dbt-02 587325 500 34 223 243 -138.18 ± 14.41 14 165 67 4 0 -301.33 ± 42.04
446330 ncm-dbt-01 583028 500 34 236 230 -148.85 ± 13.7 14 176 58 2 0 -339.63 ± 45.29
446329 ncm-dbt-04 564840 500 31 233 236 -148.85 ± 13.7 13 179 55 3 0 -342.85 ± 46.64
446328 ncm-dbt-03 588089 500 33 232 235 -146.36 ± 14.36 16 170 61 3 0 -324.17 ± 44.15
446327 ncm-dbt-05 584243 500 34 229 237 -143.07 ± 12.12 7 181 62 0 0 -339.63 ± 43.41
446326 ncm-dbt-02 584076 500 31 240 229 -154.7 ± 13.85 15 182 50 3 0 -359.68 ± 49.05
446325 ncm-dbt-04 565548 500 37 230 233 -141.44 ± 13.21 8 181 57 4 0 -330.23 ± 45.79
446324 ncm-dbt-01 581319 500 41 224 235 -133.34 ± 13.08 6 175 65 4 0 -306.84 ± 42.73
446323 ncm-dbt-03 587622 500 49 233 218 -134.15 ± 15.81 18 155 71 5 1 -280.42 ± 40.83
446322 ncm-dbt-05 578712 500 27 233 240 -152.18 ± 12.53 10 187 52 1 0 -366.78 ± 47.92
446321 ncm-dbt-04 567997 500 37 221 242 -134.15 ± 12.67 5 177 65 3 0 -312.48 ± 42.67
446320 ncm-dbt-02 587494 500 31 233 236 -148.85 ± 12.49 8 188 52 2 0 -359.68 ± 48.01
446319 ncm-dbt-01 583237 500 41 234 225 -141.44 ± 13.59 13 168 68 1 0 -315.35 ± 41.44
446318 ncm-dbt-03 587579 500 30 221 249 -139.81 ± 13.26 8 179 59 4 0 -324.17 ± 44.97
446317 ncm-dbt-04 566217 500 34 235 231 -148.02 ± 14.3 15 175 56 4 0 -333.32 ± 46.21
446316 ncm-dbt-05 585843 500 42 224 234 -132.54 ± 14.18 10 168 66 6 0 -293.29 ± 42.41
446315 ncm-dbt-02 586774 500 36 226 238 -138.99 ± 14.03 13 167 67 3 0 -306.84 ± 41.99
446314 ncm-dbt-01 580862 500 46 234 220 -137.37 ± 15.28 16 163 64 7 0 -293.29 ± 43.07
446313 ncm-dbt-03 585548 500 41 246 213 -151.34 ± 13.2 11 186 50 3 0 -359.68 ± 49.05
446312 ncm-dbt-04 566888 500 41 229 230 -137.37 ± 13.71 10 172 64 4 0 -309.64 ± 43.08
446311 ncm-dbt-05 581485 500 28 219 253 -139.81 ± 14.72 11 178 52 9 0 -315.35 ± 47.52
446310 ncm-dbt-02 588899 500 44 234 222 -138.99 ± 15.41 21 151 75 3 0 -285.49 ± 39.5
446309 ncm-dbt-01 583321 500 38 235 227 -144.71 ± 14.59 17 166 64 3 0 -315.35 ± 43.03
446308 ncm-dbt-03 586689 500 33 239 228 -152.18 ± 14.71 20 168 60 2 0 -333.32 ± 44.47
446307 ncm-dbt-03 586689 500 40 242 218 -148.85 ± 14.82 18 170 58 4 0 -327.18 ± 45.37
446306 ncm-dbt-05 582193 500 27 218 255 -139.81 ± 13.83 11 173 62 4 0 -315.35 ± 43.81
446305 ncm-dbt-04 567284 500 35 229 236 -142.25 ± 13.18 10 176 62 2 0 -327.18 ± 43.69
446304 ncm-dbt-01 582235 500 38 234 228 -143.89 ± 14.97 13 179 49 9 0 -324.17 ± 48.88
446303 ncm-dbt-02 587197 500 29 230 241 -148.02 ± 13.74 15 172 62 1 0 -333.32 ± 43.57

Commit

Commit ID 66a7a8a0cc4a5958c91c46d32197dc04523cdb43
Author FauziAkram
Date 2020-12-18 20:17:34 UTC
Adjust definition of unsafeSquares and adjust related bonus values. The bonus is now not given whenever there is an enemy piece in front of the pawn. Passed STC: LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 109472 W: 22097 L: 21673 D: 65702 Ptnml(0-2): 2111, 12800, 24482, 13240, 2103 https://tests.stockfishchess.org/tests/view/5fd8d3740c5870924361ffad Passed LTC: LLR: 2.95 (-2.94,2.94) {0.25,1.25} Total: 39384 W: 5334 L: 4990 D: 29060 Ptnml(0-2): 279, 3648, 11535, 3910, 320 https://tests.stockfishchess.org/tests/view/5fd971ab0c5870924361fff0 closes https://github.com/official-stockfish/Stockfish/pull/3266 Bench: 4488955
Copyright 2011–2026 Next Chess Move LLC