Dev Builds » 20200418-1336

Use this dev build

NCM plays each Stockfish dev build 20,000 times against Stockfish 7. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.

Summary

Host Duration Avg Base NPS Games Wins Losses Draws Elo
ncm-et-3 08:21:12 1963064 3362 2104 43 1215 +247.98 +/- 9.65
ncm-et-4 08:19:57 1960254 3291 2089 56 1146 +250.62 +/- 9.98
ncm-et-9 08:22:21 1970997 3355 2115 46 1194 +250.03 +/- 9.75
ncm-et-10 08:19:17 1963871 3303 2085 49 1169 +249.87 +/- 9.86
ncm-et-13 08:22:17 1961588 3347 2063 69 1215 +238.53 +/- 9.7
ncm-et-15 08:20:32 1972058 3342 2117 44 1181 +252.05 +/- 9.8
20000 12573 307 7120 +248.14 +/- 3.99

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
129930 ncm-et-4 2020-04-19 02:54 00:45:08 1973893 291 187 7 97 +251.08 +/- 34.71
129929 ncm-et-10 2020-04-19 02:54 00:45:19 1954366 303 195 5 103 +255.91 +/- 33.53
129928 ncm-et-15 2020-04-19 02:48 00:50:29 1974047 342 232 6 104 +275.96 +/- 33.52
129927 ncm-et-13 2020-04-19 02:47 00:52:13 1961075 347 220 7 120 +248.43 +/- 31.07
129926 ncm-et-3 2020-04-19 02:46 00:52:28 1966153 362 236 3 123 +265.57 +/- 30.48
129925 ncm-et-9 2020-04-19 02:45 00:53:47 1967871 355 217 9 129 +233.28 +/- 29.96
129924 ncm-et-4 2020-04-19 01:38 01:14:48 1962919 500 323 9 168 +256.44 +/- 26.22
129923 ncm-et-10 2020-04-19 01:37 01:15:38 1971253 500 318 3 179 +257.59 +/- 25.09
129922 ncm-et-15 2020-04-19 01:33 01:14:03 1968003 500 317 2 181 +257.59 +/- 24.89
129921 ncm-et-13 2020-04-19 01:31 01:14:56 1962463 500 303 12 185 +231.21 +/- 24.94
129920 ncm-et-3 2020-04-19 01:30 01:14:47 1964610 500 303 13 184 +230.16 +/- 25.04
129919 ncm-et-9 2020-04-19 01:30 01:13:49 1973117 500 327 7 166 +263.42 +/- 26.33
129918 ncm-et-10 2020-04-19 00:20 01:15:31 1960486 500 315 4 181 +253.02 +/- 24.98
129917 ncm-et-4 2020-04-19 00:19 01:18:04 1938636 500 322 9 169 +255.3 +/- 26.13
129916 ncm-et-15 2020-04-19 00:18 01:14:10 1974053 500 294 9 197 +224.97 +/- 23.99
129915 ncm-et-9 2020-04-19 00:15 01:14:05 1971563 500 323 5 172 +261.07 +/- 25.75
129914 ncm-et-3 2020-04-19 00:14 01:15:14 1963995 500 312 4 184 +249.64 +/- 24.75
129913 ncm-et-13 2020-04-19 00:14 01:15:42 1962305 500 305 15 180 +230.16 +/- 25.38
129912 ncm-et-10 2020-04-18 23:03 01:16:02 1963860 500 310 9 181 +241.91 +/- 25.17
129911 ncm-et-4 2020-04-18 23:02 01:15:29 1965540 500 318 8 174 +251.89 +/- 25.69
129910 ncm-et-15 2020-04-18 23:01 01:15:57 1976693 500 322 8 170 +256.44 +/- 26.02
129909 ncm-et-9 2020-04-18 23:00 01:13:51 1971100 500 312 9 179 +244.1 +/- 25.32
129908 ncm-et-3 2020-04-18 23:00 01:13:29 1964917 500 309 8 183 +241.91 +/- 24.98
129907 ncm-et-13 2020-04-18 22:59 01:14:12 1960156 500 294 10 196 +223.94 +/- 24.09
129906 ncm-et-10 2020-04-18 21:46 01:16:29 1960944 500 309 7 184 +243.0 +/- 24.87
129905 ncm-et-15 2020-04-18 21:44 01:15:50 1966314 500 307 6 187 +241.91 +/- 24.61
129904 ncm-et-4 2020-04-18 21:44 01:17:01 1954607 500 307 7 186 +240.82 +/- 24.72
129903 ncm-et-9 2020-04-18 21:43 01:15:35 1969549 500 293 7 200 +226.0 +/- 23.71
129902 ncm-et-3 2020-04-18 21:43 01:15:20 1965534 500 323 7 170 +258.75 +/- 25.99
129901 ncm-et-13 2020-04-18 21:42 01:15:34 1962510 500 319 9 172 +251.89 +/- 25.88
129900 ncm-et-10 2020-04-18 20:29 01:15:32 1967415 500 316 12 172 +245.2 +/- 25.95
129899 ncm-et-4 2020-04-18 20:29 01:14:31 1966166 500 321 9 170 +254.16 +/- 26.05
129898 ncm-et-3 2020-04-18 20:28 01:13:44 1961690 500 307 4 189 +244.1 +/- 24.38
129897 ncm-et-15 2020-04-18 20:28 01:15:07 1973272 500 317 9 174 +249.64 +/- 25.72
129896 ncm-et-9 2020-04-18 20:26 01:16:20 1975292 500 314 3 183 +253.02 +/- 24.78
129895 ncm-et-13 2020-04-18 20:26 01:15:19 1960308 500 297 5 198 +232.26 +/- 23.77
129894 ncm-et-10 2020-04-18 19:13 01:14:46 1968776 500 322 9 169 +255.3 +/- 26.13
129893 ncm-et-4 2020-04-18 19:13 01:14:56 1960020 500 311 7 182 +245.2 +/- 25.02
129892 ncm-et-15 2020-04-18 19:12 01:14:56 1972030 500 328 4 168 +268.17 +/- 26.05
129891 ncm-et-3 2020-04-18 19:11 01:16:10 1954550 500 314 4 182 +251.89 +/- 24.91
129890 ncm-et-13 2020-04-18 19:10 01:14:21 1962303 500 325 11 164 +256.44 +/- 26.61
129889 ncm-et-9 2020-04-18 19:10 01:14:54 1968492 500 329 6 165 +266.97 +/- 26.39

Commit

Commit ID 221893bf679f70098e6f751fded2fe843471c6be
Author Vizvezdenec
Date 2020-04-18 13:36:41 UTC
Apply multicut pruning more often This patch increases number of nodes where we produce multicut cutoffs. The idea is that if our ttMove failed to produce a singular extension but ttValue is greater than beta we can afford to do one more reduced search near beta excluding ttMove to see if it will produce a fail high - and if it does so produce muticut by analogy to existing logic. passed STC https://tests.stockfishchess.org/tests/view/5e9a162b5b664cdba0ce6e28 LLR: 2.94 (-2.94,2.94) {-0.50,1.50} Total: 58238 W: 11192 L: 10917 D: 36129 Ptnml(0-2): 1007, 6704, 13442, 6939, 1027 passed LTC https://tests.stockfishchess.org/tests/view/5e9a1e845b664cdba0ce7411 LLR: 2.94 (-2.94,2.94) {0.25,1.75} Total: 137852 W: 17460 L: 16899 D: 103493 Ptnml(0-2): 916, 12610, 41383, 13031, 986 closes https://github.com/official-stockfish/Stockfish/pull/2640 bench 4881443
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