Dev Builds » 20200711-0910

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 08:23:24 1962107 3325 2115 43 1167 +253.68 +/- 9.86
ncm-et-4 08:25:12 1969230 3335 2186 46 1103 +264.41 +/- 10.18
ncm-et-9 08:24:29 1967863 3319 2066 68 1185 +241.91 +/- 9.82
ncm-et-10 08:25:13 1961598 3340 2180 46 1114 +262.78 +/- 10.12
ncm-et-13 08:23:05 1961913 3339 2183 54 1102 +262.02 +/- 10.2
ncm-et-15 08:24:23 1967869 3342 2102 40 1200 +250.2 +/- 9.71
20000 12832 297 6871 +255.73 +/- 4.07

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
133991 ncm-et-3 2020-07-12 12:10 00:49:37 1964917 325 199 7 119 +235.86 +/- 31.14
133990 ncm-et-9 2020-07-12 12:09 00:50:03 1958225 319 184 8 127 +215.71 +/- 30.04
133989 ncm-et-4 2020-07-12 12:09 00:50:39 1967849 335 216 4 115 +259.23 +/- 31.6
133988 ncm-et-10 2020-07-12 12:08 00:51:33 1961240 340 235 3 102 +289.59 +/- 33.71
133987 ncm-et-15 2020-07-12 12:08 00:51:41 1963857 342 208 3 131 +240.51 +/- 29.32
133986 ncm-et-13 2020-07-12 12:07 00:52:02 1961540 339 218 7 114 +253.26 +/- 31.93
133985 ncm-et-3 2020-07-12 10:52 01:16:32 1963839 500 319 7 174 +254.16 +/- 25.66
133984 ncm-et-4 2020-07-12 10:52 01:15:51 1967231 500 331 4 165 +271.78 +/- 26.31
133983 ncm-et-13 2020-07-12 10:52 01:14:32 1960317 500 336 11 153 +269.37 +/- 27.61
133982 ncm-et-10 2020-07-12 10:52 01:15:10 1959266 500 327 4 169 +266.97 +/- 25.96
133981 ncm-et-9 2020-07-12 10:52 01:16:51 1971110 500 317 9 174 +249.64 +/- 25.72
133980 ncm-et-15 2020-07-12 10:51 01:15:03 1974549 500 331 3 166 +273.0 +/- 26.17
133979 ncm-et-9 2020-07-12 09:35 01:15:11 1964462 500 305 13 182 +232.26 +/- 25.19
133978 ncm-et-15 2020-07-12 09:35 01:15:16 1965999 500 312 7 181 +246.3 +/- 25.1
133977 ncm-et-10 2020-07-12 09:35 01:15:34 1964463 500 308 8 184 +240.82 +/- 24.91
133976 ncm-et-13 2020-07-12 09:35 01:15:39 1965689 500 336 8 156 +273.0 +/- 27.26
133975 ncm-et-3 2020-07-12 09:35 01:16:05 1960921 500 330 10 160 +263.42 +/- 26.94
133974 ncm-et-4 2020-07-12 09:35 01:15:49 1962923 500 312 8 180 +245.2 +/- 25.21
133931 ncm-et-4 2020-07-11 23:48 01:14:37 1973592 500 341 10 149 +276.69 +/- 27.98
133930 ncm-et-15 2020-07-11 23:47 01:15:16 1965072 500 310 8 182 +243.0 +/- 25.06
133929 ncm-et-3 2020-07-11 23:46 01:14:24 1960164 500 319 5 176 +256.44 +/- 25.42
133928 ncm-et-10 2020-07-11 23:46 01:16:24 1958628 500 341 5 154 +282.94 +/- 27.36
133927 ncm-et-9 2020-07-11 23:46 01:16:15 1972504 500 302 14 184 +228.08 +/- 25.06
133926 ncm-et-13 2020-07-11 23:45 01:15:19 1958470 500 333 6 161 +271.78 +/- 26.74
133925 ncm-et-4 2020-07-11 22:31 01:15:48 1970183 500 321 7 172 +256.44 +/- 25.82
133924 ncm-et-3 2020-07-11 22:31 01:14:24 1962302 500 317 6 177 +253.02 +/- 25.38
133923 ncm-et-10 2020-07-11 22:30 01:15:06 1968467 500 318 9 173 +250.77 +/- 25.8
133922 ncm-et-15 2020-07-11 22:29 01:16:07 1962920 500 312 5 183 +248.53 +/- 24.87
133921 ncm-et-9 2020-07-11 22:29 01:15:29 1966316 500 330 2 168 +273.0 +/- 25.95
133920 ncm-et-13 2020-07-11 22:28 01:15:45 1963690 500 330 8 162 +265.78 +/- 26.71
133919 ncm-et-10 2020-07-11 21:14 01:14:20 1963237 500 324 7 169 +259.91 +/- 26.07
133918 ncm-et-3 2020-07-11 21:14 01:15:40 1960464 500 318 3 179 +257.59 +/- 25.09
133917 ncm-et-4 2020-07-11 21:13 01:16:28 1969712 500 341 5 154 +282.94 +/- 27.36
133916 ncm-et-9 2020-07-11 21:13 01:14:47 1974980 500 318 12 170 +247.41 +/- 26.12
133915 ncm-et-15 2020-07-11 21:13 01:15:44 1968013 500 314 7 179 +248.53 +/- 25.26
133914 ncm-et-13 2020-07-11 21:12 01:14:43 1961538 500 306 8 186 +238.66 +/- 24.75
133913 ncm-et-3 2020-07-11 19:56 01:16:42 1962148 500 313 5 182 +249.64 +/- 24.95
133912 ncm-et-10 2020-07-11 19:56 01:17:06 1955885 500 327 10 163 +259.91 +/- 26.67
133911 ncm-et-13 2020-07-11 19:56 01:15:05 1962148 500 324 6 170 +261.07 +/- 25.96
133910 ncm-et-9 2020-07-11 19:56 01:15:53 1967448 500 310 10 180 +240.82 +/- 25.27
133909 ncm-et-15 2020-07-11 19:56 01:15:16 1974676 500 315 7 178 +249.64 +/- 25.34
133908 ncm-et-4 2020-07-11 19:56 01:16:00 1973121 500 324 8 168 +258.75 +/- 26.19

Commit

Commit ID 5e91c5dcc8066e9f346a10010ddce70f2d317ef6
Author Vizvezdenec
Date 2020-07-11 09:10:06 UTC
Maximize usage of transposition table in probcut Probcut is a heuristic that wasn't changed a lot in past years, all attempts to change it using information / writing info to transposition table failed. This patch has a number of differences that can be summarized as follows: * For TT write/read we use depth - 3. Because probcut search is depth - 4 but we actually do the move prior to it so effectively we do depth - 3 search; * In any case of depth of eval from transposition table being >= depth - 3 we either produce cutoff or refuse to even do probcut search, this is allowing us to write info of probcut to transposition table because we know that we wouldn't be overwriting some deeper data with our depth - 3 search - this is an important aspect of this patch; * For some not really known reason this patch completely ignores tte->bound() - which was the case for previous patch that made probcut interact with TT, maybe 2) is the reason, although it's unproven. A first version of this patch passed STC and LTC passed STC https://tests.stockfishchess.org/tests/view/5f05908a59f6f03532894613 LLR: 2.95 (-2.94,2.94) {-0.50,1.50} Total: 95776 W: 18300 L: 17973 D: 59503 Ptnml(0-2): 1646, 10944, 22377, 11279, 1642 passed LTC https://tests.stockfishchess.org/tests/view/5f06b54059f6f035328946bb LLR: 2.94 (-2.94,2.94) {0.25,1.75} Total: 57128 W: 7266 L: 6938 D: 42924 Ptnml(0-2): 372, 5163, 17217, 5389, 423 However, an additional bugfix was needed to avoid checking a condition on ttMove if was not available. This passed non-regression bounds on top of the first version: at STC https://tests.stockfishchess.org/tests/view/5f080e5059f6f03532894766 LLR: 2.94 (-2.94,2.94) {-1.50,0.50} Total: 14096 W: 2800 L: 2628 D: 8668 Ptnml(0-2): 225, 1620, 3238, 1688, 277 at LTC https://tests.stockfishchess.org/tests/view/5f0836a559f6f0353289479c LLR: 2.95 (-2.94,2.94) {-1.50,0.50} Total: 25352 W: 3228 L: 3139 D: 18985 Ptnml(0-2): 175, 2350, 7549, 2415, 187 closes https://github.com/official-stockfish/Stockfish/pull/2804 Bench 4540940
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