Dev Builds » 20171205-0625

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 06:03:02 2001928 2446 974 75 1397 +133.96 +/- 8.63
ncm-et-4 06:02:32 1996502 2451 922 77 1452 +124.9 +/- 8.39
ncm-et-5 01:53:27 1993467 762 305 28 429 +132.35 +/- 15.71
ncm-et-6 01:53:47 2025654 791 307 15 469 +134.61 +/- 14.6
ncm-et-7 01:53:52 2026063 767 301 17 449 +135.06 +/- 15.02
ncm-et-8 01:53:25 2020352 760 291 24 445 +127.49 +/- 15.22
ncm-et-9 06:03:00 2000533 2452 985 76 1391 +135.24 +/- 8.67
ncm-et-10 06:02:43 1968040 2409 895 79 1435 +122.53 +/- 8.44
ncm-et-11 01:53:41 2018476 763 288 25 450 +124.87 +/- 15.12
ncm-et-12 01:53:19 2019781 753 298 26 429 +131.43 +/- 15.64
ncm-et-13 06:02:43 1980813 2422 885 87 1450 +118.91 +/- 8.4
ncm-et-14 01:53:53 2017668 778 306 29 443 +129.37 +/- 15.42
ncm-et-15 06:03:00 1994507 2446 889 76 1481 +120.04 +/- 8.25
20000 7646 634 11720 +127.21 +/- 2.96

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
54660 ncm-et-13 2018-09-21 16:15 00:21:06 1986878 140 51 3 86 +124.15 +/- 33.92
54659 ncm-et-10 2018-09-21 16:14 00:22:05 1904688 145 54 6 85 +119.51 +/- 35.19
54658 ncm-et-3 2018-09-21 16:11 00:25:25 1990190 170 67 6 97 +130.47 +/- 33.01
54657 ncm-et-9 2018-09-21 16:09 00:26:58 1989085 179 81 9 89 +148.12 +/- 35.64
54656 ncm-et-4 2018-09-21 16:09 00:27:40 1990349 183 66 8 109 +114.04 +/- 30.96
54655 ncm-et-15 2018-09-21 16:09 00:27:58 1984047 183 61 6 116 +107.75 +/- 29.15
54654 ncm-et-13 2018-09-21 15:00 01:13:46 1986564 500 194 14 292 +130.94 +/- 18.75
54653 ncm-et-10 2018-09-21 14:58 01:14:59 1982164 500 179 15 306 +118.33 +/- 18.09
54652 ncm-et-4 2018-09-21 14:55 01:12:18 1989401 500 195 17 288 +129.35 +/- 19.04
54651 ncm-et-3 2018-09-21 14:55 01:14:51 1987981 500 210 11 279 +146.36 +/- 19.3
54650 ncm-et-9 2018-09-21 14:55 01:13:39 1989558 500 206 13 281 +141.44 +/- 19.27
54649 ncm-et-15 2018-09-21 14:53 01:14:21 1983733 500 185 13 302 +124.6 +/- 18.22
54648 ncm-et-10 2018-09-21 13:42 01:15:08 1980758 500 190 18 292 +124.6 +/- 18.87
54647 ncm-et-13 2018-09-21 13:41 01:17:58 1901969 500 171 23 306 +106.01 +/- 18.31
54646 ncm-et-3 2018-09-21 13:40 01:14:16 1989400 500 198 18 284 +130.94 +/- 19.27
54645 ncm-et-9 2018-09-21 13:40 01:14:05 1987193 500 204 14 282 +138.99 +/- 19.25
54644 ncm-et-4 2018-09-21 13:39 01:15:10 1988139 500 182 18 300 +118.33 +/- 18.48
54643 ncm-et-15 2018-09-21 13:39 01:13:17 1981224 500 198 16 286 +132.54 +/- 19.11
54642 ncm-et-4 2018-09-21 12:24 01:13:40 1988611 500 211 11 278 +147.19 +/- 19.35
54641 ncm-et-10 2018-09-21 12:24 01:16:39 1900103 500 179 13 308 +119.89 +/- 17.93
54640 ncm-et-9 2018-09-21 12:24 01:14:20 1987035 500 204 15 281 +138.18 +/- 19.33
54639 ncm-et-13 2018-09-21 12:24 01:16:06 1958655 500 181 17 302 +118.33 +/- 18.35
54638 ncm-et-15 2018-09-21 12:24 01:13:33 1980756 500 178 16 306 +116.78 +/- 18.12
54637 ncm-et-3 2018-09-21 12:24 01:14:37 1989086 500 198 13 289 +134.95 +/- 18.87
7970 ncm-et-12 2018-03-13 11:13 00:37:40 2022630 253 91 6 156 +121.44 +/- 25.16
7969 ncm-et-8 2018-03-13 11:13 00:37:50 2022303 260 100 3 157 +136.19 +/- 24.93
7968 ncm-et-10 2018-03-13 11:13 00:38:14 2020184 264 92 6 166 +117.46 +/- 24.19
7967 ncm-et-15 2018-03-13 11:13 00:38:32 2021162 263 97 8 158 +122.4 +/- 25.36
7966 ncm-et-5 2018-03-13 11:13 00:38:24 2024263 262 115 9 138 +149.09 +/- 28.08
7965 ncm-et-7 2018-03-13 11:12 00:39:12 2026063 267 104 8 155 +130.76 +/- 25.85
7964 ncm-et-11 2018-03-13 11:12 00:39:13 2018558 263 90 10 163 +109.14 +/- 24.87
7963 ncm-et-9 2018-03-13 11:11 00:39:50 2024918 273 107 9 157 +130.53 +/- 25.81
7962 ncm-et-4 2018-03-13 11:11 00:40:09 2000700 268 85 10 173 +99.89 +/- 23.76
7961 ncm-et-3 2018-03-13 11:11 00:40:28 2028525 276 103 9 164 +123.25 +/- 25.02
7960 ncm-et-14 2018-03-13 11:11 00:40:38 2015312 278 119 8 151 +146.89 +/- 26.57
7959 ncm-et-13 2018-03-13 11:10 00:41:19 2025408 282 112 9 161 +133.04 +/- 25.51
7958 ncm-et-6 2018-03-13 11:09 00:41:34 2026718 291 110 4 177 +132.65 +/- 23.48
7957 ncm-et-5 2018-03-13 09:56 01:15:03 1962672 500 190 19 291 +123.81 +/- 18.95
7956 ncm-et-4 2018-03-13 09:56 01:13:35 2021816 500 183 13 304 +123.02 +/- 18.13
7955 ncm-et-13 2018-03-13 09:56 01:12:28 2025408 500 176 21 303 +111.37 +/- 18.41
7954 ncm-et-15 2018-03-13 09:56 01:15:19 2016122 500 170 17 313 +109.83 +/- 17.81
7953 ncm-et-10 2018-03-13 09:56 01:15:38 2020347 500 201 21 278 +130.94 +/- 19.65
7952 ncm-et-3 2018-03-13 09:56 01:13:25 2026390 500 198 18 284 +130.94 +/- 19.27
7951 ncm-et-12 2018-03-13 09:56 01:15:39 2016933 500 207 20 273 +136.56 +/- 19.87
7950 ncm-et-14 2018-03-13 09:56 01:13:15 2020024 500 187 21 292 +119.89 +/- 18.95
7949 ncm-et-8 2018-03-13 09:56 01:15:35 2018401 500 191 21 288 +123.02 +/- 19.15
7948 ncm-et-7 2018-03-13 09:56 01:14:40 2026063 500 197 9 294 +137.37 +/- 18.48
7947 ncm-et-9 2018-03-13 09:56 01:14:08 2025409 500 183 16 301 +120.67 +/- 18.37
7946 ncm-et-11 2018-03-13 09:56 01:14:28 2018395 500 198 15 287 +133.34 +/- 19.03
7945 ncm-et-6 2018-03-13 09:56 01:12:13 2024590 500 197 11 292 +135.76 +/- 18.65

Commit

Commit ID be382bb0cf5927dc10ff9be882f6980a78d1484a
Author Stéphane Nicolet
Date 2017-12-05 06:25:42 UTC
A better contempt implementation for Stockfish (#1325) * A better contempt implementation for Stockfish The round 2 of TCEC season 10 demonstrated the benefit of having a nice contempt implementation: it gives the strongest programs in the tournament the ability to slow down the game when they feel the position is slightly worse, prefering to stay in a complicated (even if slightly risky) middle game rather than simplifying by force into a drawn endgame. The current contempt implementation of Stockfish is inadequate, and this patch is an attempt to provide a better one. Passed STC non-regression test against master: LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 83360 W: 15089 L: 15075 D: 53196 http://tests.stockfishchess.org/tests/view/5a1bf2de0ebc590ccbb8b370 This contempt implementation is showing promising results in certains situations. For instance, it obtained a nice +30 Elo gain when playing with contempt=40 against Stockfish 7, compared to current master: • master against SF 7 (20000 games at LTC): +121.2 Elo • this patch with contempt=40 (20000 games at LTC): +154.11 Elo This was the result of real cooperative work from the Stockfish team, with key ideas coming from Stefan Geschwentner (locutus2) and Chris Cain (ceebo) while most of the community helped with feedback and computer time. In this commit the bench is unchanged by default, but you can test at home with the new contempt in the UCI options. The style of play will change a lot when using contempt different of zero (I repeat: not done in this version by default, however)! The Stockfish team is still deliberating over the best default contempt value in self-play and the best contempt modeling strategy, to help users choosing a contempt value when playing against much weaker programs. These informations will be given in future commits when available :-) Bench: 5051254 * Remove the prefetch No functional change.
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