Dev Builds » 20200123-1803

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 08:24:07 1963053 3350 2080 68 1202 +241.15 +/- 9.75
ncm-et-4 08:23:59 1956856 3306 2057 64 1185 +242.37 +/- 9.82
ncm-et-9 08:23:50 1964557 3322 2025 60 1237 +236.25 +/- 9.58
ncm-et-10 08:24:02 1962652 3319 2049 57 1213 +240.92 +/- 9.68
ncm-et-13 08:24:11 1972177 3354 2089 55 1210 +244.34 +/- 9.7
ncm-et-15 08:23:42 1970890 3349 2059 50 1240 +240.76 +/- 9.55
20000 12359 354 7287 +240.96 +/- 3.95

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
113047 ncm-et-4 2020-01-24 12:39 00:46:44 1966187 306 191 8 107 +239.76 +/- 32.99
113046 ncm-et-10 2020-01-24 12:37 00:48:43 1957246 319 195 4 120 +240.14 +/- 30.78
113045 ncm-et-9 2020-01-24 12:37 00:49:09 1966000 322 195 10 117 +227.31 +/- 31.54
113044 ncm-et-15 2020-01-24 12:33 00:52:25 1974983 349 228 2 119 +267.91 +/- 30.92
113043 ncm-et-3 2020-01-24 12:33 00:52:38 1963532 350 226 7 117 +255.14 +/- 31.51
113042 ncm-et-13 2020-01-24 12:32 00:53:41 1969086 354 204 7 143 +218.1 +/- 28.17
113041 ncm-et-4 2020-01-24 11:22 01:16:14 1968199 500 302 13 185 +229.12 +/- 24.96
113040 ncm-et-9 2020-01-24 11:20 01:15:26 1965538 500 291 9 200 +221.9 +/- 23.78
113039 ncm-et-10 2020-01-24 11:18 01:17:46 1957094 500 297 10 193 +227.04 +/- 24.3
113038 ncm-et-3 2020-01-24 11:18 01:14:02 1962150 500 308 13 179 +235.45 +/- 25.42
113037 ncm-et-15 2020-01-24 11:18 01:14:39 1976852 500 323 7 170 +258.75 +/- 25.99
113036 ncm-et-13 2020-01-24 11:17 01:13:46 1977785 500 318 5 177 +255.3 +/- 25.34
113035 ncm-et-9 2020-01-24 10:04 01:14:52 1966164 500 318 9 173 +250.77 +/- 25.8
113034 ncm-et-4 2020-01-24 10:03 01:17:22 1901570 500 320 5 175 +257.59 +/- 25.5
113033 ncm-et-13 2020-01-24 10:03 01:13:48 1969881 500 312 9 179 +244.1 +/- 25.32
113032 ncm-et-10 2020-01-24 10:02 01:15:35 1968776 500 306 9 185 +237.58 +/- 24.86
113031 ncm-et-15 2020-01-24 10:01 01:15:42 1975136 500 296 10 194 +226.0 +/- 24.23
113030 ncm-et-3 2020-01-24 10:00 01:16:39 1962621 500 305 13 182 +232.26 +/- 25.19
113029 ncm-et-9 2020-01-24 08:47 01:16:19 1969717 500 306 5 189 +241.91 +/- 24.42
113028 ncm-et-4 2020-01-24 08:47 01:15:41 1968333 500 298 6 196 +232.26 +/- 23.95
113027 ncm-et-13 2020-01-24 08:46 01:15:34 1979347 500 308 6 186 +243.0 +/- 24.68
113026 ncm-et-15 2020-01-24 08:46 01:14:19 1967391 500 307 13 180 +234.38 +/- 25.34
113025 ncm-et-3 2020-01-24 08:45 01:14:21 1961845 500 305 10 185 +235.45 +/- 24.89
113024 ncm-et-10 2020-01-24 08:44 01:16:32 1961395 500 310 10 180 +240.82 +/- 25.27
113023 ncm-et-4 2020-01-24 07:30 01:15:22 1963070 500 319 10 171 +250.77 +/- 25.99
113022 ncm-et-9 2020-01-24 07:30 01:15:34 1961850 500 299 11 190 +228.08 +/- 24.55
113021 ncm-et-15 2020-01-24 07:30 01:14:51 1964764 500 310 8 182 +243.0 +/- 25.06
113020 ncm-et-13 2020-01-24 07:30 01:15:20 1970331 500 314 10 176 +245.2 +/- 25.59
113019 ncm-et-3 2020-01-24 07:28 01:15:42 1961688 500 329 5 166 +268.17 +/- 26.26
113018 ncm-et-10 2020-01-24 07:28 01:14:51 1972029 500 309 9 182 +240.82 +/- 25.09
113017 ncm-et-9 2020-01-24 06:14 01:15:20 1963840 500 313 7 180 +247.41 +/- 25.18
113016 ncm-et-4 2020-01-24 06:14 01:15:37 1962460 500 309 15 176 +234.38 +/- 25.69
113015 ncm-et-15 2020-01-24 06:13 01:15:30 1966468 500 305 7 188 +238.66 +/- 24.57
113014 ncm-et-13 2020-01-24 06:13 01:15:49 1966459 500 322 8 170 +256.44 +/- 26.02
113013 ncm-et-10 2020-01-24 06:12 01:15:01 1965540 500 318 5 177 +255.3 +/- 25.34
113012 ncm-et-3 2020-01-24 06:11 01:16:05 1965845 500 308 9 183 +239.74 +/- 25.01
113011 ncm-et-15 2020-01-24 04:56 01:16:16 1970642 500 290 3 207 +227.04 +/- 23.07
113010 ncm-et-9 2020-01-24 04:56 01:17:10 1958794 500 303 9 188 +234.38 +/- 24.64
113009 ncm-et-4 2020-01-24 04:56 01:16:59 1968175 500 318 7 175 +253.02 +/- 25.58
113008 ncm-et-3 2020-01-24 04:55 01:14:40 1963696 500 299 11 190 +228.08 +/- 24.55
113007 ncm-et-10 2020-01-24 04:55 01:15:34 1956484 500 314 10 176 +245.2 +/- 25.59
113006 ncm-et-13 2020-01-24 04:55 01:16:13 1972352 500 311 10 179 +241.91 +/- 25.35

Commit

Commit ID 18fc21eba0368fd5e3c4c4b8ee1000c9ac445425
Author Vizvezdenec
Date 2020-01-23 18:03:25 UTC
Tweak trapped rook penalty This patch greatly increases the endgame penalty for having a trapped rook. Idea was a result of witnessing Stockfish losing some games at CCCC exchanging pieces in the position with a trapped rook which directly lead to a lost endgame. This patch should partially fix such behavior making this penalty high even in deep endgames. Passed STC http://tests.stockfishchess.org/tests/view/5e279d7cc3b97aa0d75bc1c4 LLR: 2.94 (-2.94,2.94) {-1.00,3.00} Total: 8528 W: 1706 L: 1588 D: 5234 Ptnml(0-2): 133, 957, 1985, 1024, 159 Passed LTC http://tests.stockfishchess.org/tests/view/5e27aee4c3b97aa0d75bc1e1 LLR: 2.95 (-2.94,2.94) {0.00,2.00} Total: 88713 W: 11520 L: 11130 D: 66063 Ptnml(0-2): 646, 8170, 26342, 8492, 676 Closes https://github.com/official-stockfish/Stockfish/pull/2510 Bench: 4964462 ---------------------- Comment by Malcolm Campbell: Congrats! I think this might be a common pattern - scores that seem to mainly apply to the midgame are often better with a similar (or at least fairly big) endgame value as well. Maybe there are others eval parameters we can tweak like this...
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