Dev Builds » 20200628-1957

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 08:25:12 1963008 3324 2133 45 1146 +256.54 +/- 9.97
ncm-et-4 08:25:19 1956887 3336 2160 44 1132 +260.08 +/- 10.03
ncm-et-9 08:25:10 1967931 3352 2168 35 1149 +261.27 +/- 9.93
ncm-et-10 08:25:32 1960664 3300 2120 42 1138 +257.42 +/- 10.0
ncm-et-13 08:25:28 1958591 3330 2131 52 1147 +254.34 +/- 9.98
ncm-et-15 08:25:24 1968277 3358 2134 54 1170 +251.56 +/- 9.87
20000 12846 272 6882 +256.85 +/- 4.07

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
133370 ncm-et-10 2020-07-01 01:34 00:45:51 1963553 300 192 4 104 +255.68 +/- 33.27
133369 ncm-et-3 2020-07-01 01:30 00:49:23 1963224 324 211 6 107 +259.16 +/- 32.96
133368 ncm-et-4 2020-07-01 01:29 00:50:39 1967235 336 205 6 125 +236.65 +/- 30.28
133367 ncm-et-13 2020-07-01 01:29 00:50:56 1962765 330 194 5 131 +226.38 +/- 29.39
133366 ncm-et-9 2020-07-01 01:26 00:53:02 1962766 352 213 4 135 +237.45 +/- 28.94
133365 ncm-et-15 2020-07-01 01:25 00:54:14 1970804 358 235 3 120 +268.19 +/- 30.88
133364 ncm-et-10 2020-07-01 00:15 01:17:39 1958789 500 330 8 162 +265.78 +/- 26.71
133363 ncm-et-3 2020-07-01 00:13 01:16:12 1961843 500 319 6 175 +255.3 +/- 25.54
133362 ncm-et-13 2020-07-01 00:11 01:16:15 1956635 500 325 8 167 +259.91 +/- 26.28
133361 ncm-et-4 2020-07-01 00:11 01:16:38 1945588 500 332 6 162 +270.57 +/- 26.65
133360 ncm-et-9 2020-07-01 00:10 01:15:03 1972507 500 322 3 175 +262.24 +/- 25.42
133359 ncm-et-15 2020-07-01 00:09 01:15:33 1962610 500 317 16 167 +241.91 +/- 26.42
133358 ncm-et-3 2020-06-30 22:56 01:16:07 1965688 500 319 9 172 +251.89 +/- 25.88
133357 ncm-et-13 2020-06-30 22:56 01:14:42 1961074 500 332 12 156 +263.42 +/- 27.34
133356 ncm-et-4 2020-06-30 22:56 01:14:38 1966925 500 334 6 160 +273.0 +/- 26.83
133355 ncm-et-10 2020-06-30 22:55 01:19:18 1955121 500 326 0 174 +270.57 +/- 25.33
133354 ncm-et-9 2020-06-30 22:54 01:15:19 1964935 500 325 4 171 +264.6 +/- 25.79
133353 ncm-et-15 2020-06-30 22:54 01:14:04 1969556 500 312 10 178 +243.0 +/- 25.43
133352 ncm-et-3 2020-06-30 21:39 01:16:03 1961536 500 323 5 172 +261.07 +/- 25.75
133351 ncm-et-4 2020-06-30 21:38 01:16:46 1944405 500 321 7 172 +256.44 +/- 25.82
133350 ncm-et-13 2020-06-30 21:38 01:16:54 1948881 500 327 7 166 +263.42 +/- 26.33
133349 ncm-et-9 2020-06-30 21:37 01:15:49 1968016 500 332 5 163 +271.78 +/- 26.53
133348 ncm-et-10 2020-06-30 21:36 01:17:36 1952691 500 310 7 183 +244.1 +/- 24.95
133347 ncm-et-15 2020-06-30 21:35 01:17:40 1970794 500 319 5 176 +256.44 +/- 25.42
133346 ncm-et-4 2020-06-30 20:23 01:13:40 1967231 500 325 6 169 +262.24 +/- 26.04
133345 ncm-et-3 2020-06-30 20:22 01:15:57 1959859 500 315 8 177 +248.53 +/- 25.45
133344 ncm-et-13 2020-06-30 20:21 01:15:33 1961076 500 311 10 179 +241.91 +/- 25.35
133343 ncm-et-9 2020-06-30 20:21 01:15:11 1971268 500 319 9 172 +251.89 +/- 25.88
133342 ncm-et-10 2020-06-30 20:20 01:15:11 1961861 500 316 8 176 +249.64 +/- 25.53
133341 ncm-et-15 2020-06-30 20:19 01:14:21 1968625 500 328 2 170 +270.57 +/- 25.78
133340 ncm-et-4 2020-06-30 19:07 01:15:08 1963839 500 313 8 179 +246.3 +/- 25.29
133339 ncm-et-3 2020-06-30 19:06 01:14:37 1965533 500 319 5 176 +256.44 +/- 25.42
133338 ncm-et-13 2020-06-30 19:05 01:15:08 1962917 500 323 3 174 +263.42 +/- 25.5
133337 ncm-et-9 2020-06-30 19:05 01:15:02 1964922 500 313 5 182 +249.64 +/- 24.95
133336 ncm-et-10 2020-06-30 19:03 01:15:24 1962469 500 341 7 152 +280.42 +/- 27.62
133335 ncm-et-15 2020-06-30 19:03 01:15:08 1969551 500 311 5 184 +247.41 +/- 24.79
133334 ncm-et-3 2020-06-30 17:48 01:16:53 1963379 500 327 6 167 +264.6 +/- 26.21
133333 ncm-et-4 2020-06-30 17:48 01:17:50 1942989 500 330 5 165 +269.37 +/- 26.35
133332 ncm-et-15 2020-06-30 17:48 01:14:24 1966005 500 312 13 175 +239.74 +/- 25.73
133331 ncm-et-9 2020-06-30 17:48 01:15:44 1971104 500 344 5 151 +286.77 +/- 27.65
133330 ncm-et-10 2020-06-30 17:48 01:14:33 1970168 500 305 8 187 +237.58 +/- 24.68
133329 ncm-et-13 2020-06-30 17:48 01:16:00 1956794 500 319 7 174 +254.16 +/- 25.66

Commit

Commit ID de24fcebc873ce2d65b30e039745dbc2e851f443
Author mstembera
Date 2020-06-28 19:57:37 UTC
Fix fragile code to use proper random 64 bit keys. This fixes an old issue where we want to make a position unique but only change a small number of bits in the key instead of all 64 of them randomly. This is fragile and can lead to non uniqueness issues in the TT. Key make_key(uint64_t seed) takes any integer and produces a unique random 64 bit key. It is computationally efficient and is based on a congruential pseudo random number generator using well tested constants by Donald Knuth (see https://en.wikipedia.org/wiki/Linear_congruential_generator) STC https://tests.stockfishchess.org/tests/view/5ef6c78f761b685b4c724bb6 LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 154320 W: 29343 L: 29376 D: 95601 Ptnml(0-2): 2543, 18170, 35891, 17889, 2667 LTC https://tests.stockfishchess.org/tests/view/5ef7d1a9020eec13834a940e LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 53488 W: 6629 L: 6584 D: 40275 Ptnml(0-2): 372, 4878, 16183, 4955, 356 closes https://github.com/official-stockfish/Stockfish/pull/2773 bench: 4626776
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