Dev Builds » 20180508-0914

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 06:05:11 2002184 2401 1159 71 1171 +169.77 +/- 9.69
ncm-et-4 06:03:42 1999396 2384 1128 88 1168 +162.45 +/- 9.74
ncm-et-5 01:50:18 2022956 717 330 24 363 +158.41 +/- 17.38
ncm-et-6 01:48:48 2026226 719 329 17 373 +161.47 +/- 16.95
ncm-et-7 01:48:52 1997505 704 323 23 358 +158.14 +/- 17.48
ncm-et-8 01:49:39 2007597 735 350 22 363 +166.78 +/- 17.4
ncm-et-9 06:04:24 2000483 2395 1081 66 1248 +157.15 +/- 9.28
ncm-et-10 06:00:26 1994831 2362 1100 71 1191 +162.2 +/- 9.57
ncm-et-11 01:49:06 1998737 715 345 22 348 +169.16 +/- 17.82
ncm-et-12 01:48:18 2016967 718 353 16 349 +176.93 +/- 17.69
ncm-et-13 06:04:34 1987172 2387 1097 71 1219 +159.71 +/- 9.44
ncm-et-14 01:49:04 2018882 707 337 28 342 +162.8 +/- 18.08
ncm-et-15 06:02:30 1977723 2371 1119 56 1196 +167.68 +/- 9.5
ncm-et-16 01:45:49 2005301 685 314 25 346 +156.35 +/- 17.84
20000 9365 600 10035 +163.32 +/- 3.3

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
50844 ncm-et-15 2018-08-23 00:33 00:24:44 1978097 165 74 3 88 +159.91 +/- 34.7
50843 ncm-et-13 2018-08-23 00:33 00:25:32 1912248 156 70 3 83 +159.57 +/- 35.79
50842 ncm-et-9 2018-08-23 00:33 00:25:44 1987829 167 74 2 91 +160.27 +/- 33.75
50841 ncm-et-10 2018-08-23 00:32 00:26:10 1981071 172 81 4 87 +167.39 +/- 35.39
50840 ncm-et-4 2018-08-23 00:32 00:26:10 1990982 166 81 4 81 +174.49 +/- 36.92
50839 ncm-et-3 2018-08-23 00:32 00:26:14 1991930 174 83 3 88 +172.68 +/- 35.01
50838 ncm-et-15 2018-08-22 23:17 01:14:54 1979038 500 240 13 247 +170.15 +/- 21.05
50837 ncm-et-13 2018-08-22 23:15 01:16:09 1989874 500 239 12 249 +170.15 +/- 20.91
50836 ncm-et-3 2018-08-22 23:15 01:15:54 1990508 500 259 9 232 +190.85 +/- 21.76
50835 ncm-et-9 2018-08-22 23:15 01:16:37 1989717 500 216 17 267 +146.36 +/- 20.1
50834 ncm-et-10 2018-08-22 23:14 01:16:37 1981694 500 226 9 265 +161.49 +/- 19.95
50833 ncm-et-4 2018-08-22 23:14 01:16:39 1990034 500 224 19 257 +151.35 +/- 20.68
50832 ncm-et-3 2018-08-22 21:58 01:15:53 1989243 500 226 15 259 +156.39 +/- 20.46
50831 ncm-et-9 2018-08-22 21:58 01:15:49 1987981 500 229 17 254 +157.24 +/- 20.78
50830 ncm-et-10 2018-08-22 21:57 01:16:03 1981539 500 228 17 255 +156.39 +/- 20.73
50829 ncm-et-13 2018-08-22 21:57 01:17:05 1983582 500 223 20 257 +149.68 +/- 20.7
50828 ncm-et-15 2018-08-22 21:56 01:19:57 1890362 500 244 15 241 +171.9 +/- 21.44
50827 ncm-et-4 2018-08-22 21:56 01:17:04 1991615 500 254 17 229 +179.0 +/- 22.18
50826 ncm-et-15 2018-08-22 20:40 01:15:15 1981073 500 230 8 262 +165.8 +/- 20.07
50825 ncm-et-9 2018-08-22 20:40 01:16:58 1986721 500 218 9 273 +154.7 +/- 19.53
50824 ncm-et-10 2018-08-22 20:40 01:16:22 1981538 500 250 12 238 +179.9 +/- 21.52
50823 ncm-et-13 2018-08-22 20:40 01:16:13 1987825 500 237 16 247 +164.93 +/- 21.14
50822 ncm-et-4 2018-08-22 20:40 01:15:18 1990822 500 223 24 253 +146.36 +/- 21.0
50821 ncm-et-3 2018-08-22 20:40 01:17:06 1992407 500 239 21 240 +162.35 +/- 21.64
27710 ncm-et-16 2018-05-08 17:54 00:28:19 2020510 185 86 6 93 +160.82 +/- 34.48
27709 ncm-et-10 2018-05-08 17:53 00:28:58 2019859 190 73 9 108 +121.79 +/- 31.55
27708 ncm-et-7 2018-05-08 17:52 00:30:43 2025572 204 93 6 105 +158.28 +/- 32.24
27707 ncm-et-15 2018-05-08 17:51 00:30:54 2017747 206 91 8 107 +148.4 +/- 32.09
27706 ncm-et-11 2018-05-08 17:49 00:32:56 2016772 215 107 7 101 +175.05 +/- 33.37
27705 ncm-et-6 2018-05-08 17:49 00:33:12 2026718 219 106 7 106 +169.3 +/- 32.44
27704 ncm-et-14 2018-05-08 17:49 00:33:01 2018720 207 101 7 99 +170.2 +/- 33.66
27703 ncm-et-12 2018-05-08 17:49 00:33:12 2021977 218 105 3 110 +176.28 +/- 31.19
27702 ncm-et-4 2018-05-08 17:49 00:33:25 2009478 218 110 6 102 +180.38 +/- 33.12
27701 ncm-et-5 2018-05-08 17:49 00:33:44 2023119 217 87 5 125 +138.13 +/- 28.69
27700 ncm-et-9 2018-05-08 17:48 00:34:02 2026882 228 114 3 111 +184.81 +/- 31.2
27699 ncm-et-8 2018-05-08 17:48 00:34:25 2024099 235 106 7 122 +156.08 +/- 29.86
27698 ncm-et-3 2018-05-08 17:48 00:34:22 2025245 227 111 8 108 +170.04 +/- 32.26
27697 ncm-et-13 2018-05-08 17:48 00:34:40 2024754 231 109 3 119 +172.29 +/- 29.84
27696 ncm-et-10 2018-05-08 16:36 01:16:16 2023289 500 242 20 238 +165.8 +/- 21.73
27695 ncm-et-16 2018-05-08 16:35 01:17:30 1990092 500 228 19 253 +154.7 +/- 20.89
27694 ncm-et-15 2018-05-08 16:34 01:16:46 2020021 500 240 9 251 +173.67 +/- 20.69
27693 ncm-et-12 2018-05-08 16:33 01:15:06 2011957 500 248 13 239 +177.22 +/- 21.49
27692 ncm-et-4 2018-05-08 16:33 01:15:06 2023447 500 236 18 246 +162.35 +/- 21.24
27691 ncm-et-6 2018-05-08 16:33 01:15:36 2025735 500 223 10 267 +158.08 +/- 19.88
27690 ncm-et-7 2018-05-08 16:32 01:18:09 1969438 500 230 17 253 +158.08 +/- 20.84
27689 ncm-et-11 2018-05-08 16:32 01:16:10 1980703 500 238 15 247 +166.66 +/- 21.11
27688 ncm-et-14 2018-05-08 16:32 01:16:03 2019045 500 236 21 243 +159.78 +/- 21.48
27687 ncm-et-13 2018-05-08 16:32 01:14:55 2024754 500 219 17 264 +148.85 +/- 20.26
27686 ncm-et-9 2018-05-08 16:32 01:15:14 2023772 500 230 18 252 +157.24 +/- 20.92
27685 ncm-et-8 2018-05-08 16:32 01:15:14 1991096 500 244 15 241 +171.9 +/- 21.44
27684 ncm-et-3 2018-05-08 16:31 01:15:42 2023772 500 241 15 244 +169.27 +/- 21.27
27683 ncm-et-5 2018-05-08 16:31 01:16:34 2022793 500 243 19 238 +167.53 +/- 21.71

Commit

Commit ID 6634f41ac9e76fe623dd36d312b6955ab2c66a4f
Author Alain SAVARD
Date 2018-05-08 09:14:43 UTC
Drop the lever condition for backwards We can view the patch version as adding some "undermining bonus" for level pawns, when the defending side can not easily avoid the exchange by advancing her pawn. • Case 1) White b2,c3, Black a3,b3: Black is breaking through, b2 deserves a penalty • Case 2) White b2,c3, Black a3,c4: if b2xa3 then White ends up with a weak pawn on a3 and probably a weak pawn on c3 too. In either case, White can still not safely play b2-b3 and make a phalanx with c3, which is the essence of a backward pawn definition. Passed STC in SPRT[0, 4]: LLR: -2.96 (-2.94,2.94) [0.00,4.00] Total: 131169 W: 26523 L: 26199 D: 78447 http://tests.stockfishchess.org/tests/view/5aefa4d50ebc5902a409a151 ELO 1.19 [-0.38,2.88] (95%) Passed LTC in SPRT[-3, 1]: LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 24824 W: 3732 L: 3617 D: 17475 http://tests.stockfishchess.org/tests/view/5af04d3f0ebc5902a88b2e55 ELO 1.27 [-1.21,3.70] (95%) Closes https://github.com/official-stockfish/Stockfish/pull/1584 How to continue from there? There were some promising tests a couple of months ago about adding a lever condition for king danger in evaluate.cpp, maybe it would be time to re-try this after all the recent changes in pawns.cpp Bench: 4773882
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