Dev Builds » 20180829-0049

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 08:41:16 1990033 3388 1760 92 1536 +187.31 +/- 8.52
ncm-et-4 08:42:57 1989943 3398 1758 96 1544 +185.84 +/- 8.5
ncm-et-9 08:41:50 1989311 3383 1716 90 1577 +181.99 +/- 8.38
ncm-et-10 08:36:03 1952267 3277 1635 83 1559 +178.83 +/- 8.4
ncm-et-13 08:38:30 1957450 3293 1687 91 1515 +183.82 +/- 8.57
ncm-et-15 08:32:01 1970188 3261 1659 93 1509 +181.8 +/- 8.59
20000 10215 545 9240 +183.29 +/- 3.47

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
51654 ncm-et-15 2018-08-29 10:38 00:40:15 1983419 261 137 15 109 +176.07 +/- 32.69
51653 ncm-et-10 2018-08-29 10:34 00:43:51 1941687 277 141 7 129 +183.4 +/- 29.39
51652 ncm-et-13 2018-08-29 10:31 00:46:53 1885038 293 147 8 138 +179.19 +/- 28.41
51651 ncm-et-3 2018-08-29 10:19 00:59:14 1991930 388 202 13 173 +184.93 +/- 25.59
51650 ncm-et-9 2018-08-29 10:19 00:59:21 1989716 383 190 11 182 +176.04 +/- 24.71
51649 ncm-et-4 2018-08-29 10:17 01:01:04 1988138 398 193 9 196 +173.8 +/- 23.59
51648 ncm-et-15 2018-08-29 09:19 01:17:34 1953496 500 261 9 230 +192.71 +/- 21.88
51647 ncm-et-10 2018-08-29 09:16 01:17:00 1982009 500 229 11 260 +162.35 +/- 20.28
51646 ncm-et-13 2018-08-29 09:12 01:18:38 1988143 500 272 17 211 +195.51 +/- 23.27
51645 ncm-et-3 2018-08-29 09:02 01:16:10 1989874 500 264 8 228 +196.45 +/- 21.96
51644 ncm-et-9 2018-08-29 09:01 01:16:20 1989560 500 257 8 235 +189.92 +/- 21.55
51643 ncm-et-4 2018-08-29 08:59 01:17:35 1988928 500 261 14 225 +188.08 +/- 22.34
51642 ncm-et-15 2018-08-29 08:00 01:18:27 1982634 500 257 13 230 +185.33 +/- 22.01
51641 ncm-et-10 2018-08-29 07:56 01:19:32 1951421 500 247 19 234 +171.02 +/- 21.93
51640 ncm-et-13 2018-08-29 07:52 01:18:25 1987352 500 253 13 234 +181.7 +/- 21.78
51639 ncm-et-3 2018-08-29 07:44 01:17:01 1987036 500 273 13 214 +200.24 +/- 22.98
51638 ncm-et-9 2018-08-29 07:42 01:18:36 1990980 500 246 13 241 +175.44 +/- 21.38
51637 ncm-et-4 2018-08-29 07:41 01:16:49 1990033 500 274 14 212 +200.24 +/- 23.14
51636 ncm-et-15 2018-08-29 06:42 01:17:10 1984676 500 252 13 235 +180.8 +/- 21.72
51635 ncm-et-10 2018-08-29 06:35 01:20:03 1931820 500 265 13 222 +192.71 +/- 22.49
51634 ncm-et-13 2018-08-29 06:29 01:22:14 1879861 500 250 10 240 +181.7 +/- 21.34
51633 ncm-et-3 2018-08-29 06:25 01:17:46 1991613 500 244 16 240 +171.02 +/- 21.52
51632 ncm-et-9 2018-08-29 06:24 01:16:48 1987984 500 264 11 225 +193.64 +/- 22.25
51631 ncm-et-4 2018-08-29 06:23 01:16:16 1992723 500 249 17 234 +174.55 +/- 21.89
51630 ncm-et-15 2018-08-29 05:21 01:19:48 1951889 500 252 14 234 +179.9 +/- 21.81
51629 ncm-et-10 2018-08-29 05:16 01:17:10 1979973 500 270 9 221 +201.19 +/- 22.42
51628 ncm-et-13 2018-08-29 05:11 01:16:31 1990032 500 267 8 225 +199.29 +/- 22.14
51627 ncm-et-9 2018-08-29 05:07 01:15:41 1988454 500 238 16 246 +165.8 +/- 21.19
51626 ncm-et-3 2018-08-29 05:06 01:17:18 1989560 500 259 10 231 +189.92 +/- 21.86
51625 ncm-et-4 2018-08-29 05:05 01:16:53 1989400 500 262 12 226 +190.85 +/- 22.22
51624 ncm-et-15 2018-08-29 04:01 01:18:51 1983262 500 249 10 241 +180.8 +/- 21.28
51623 ncm-et-10 2018-08-29 03:58 01:16:59 1982793 500 247 12 241 +177.22 +/- 21.35
51622 ncm-et-13 2018-08-29 03:52 01:17:50 1986721 500 246 16 238 +172.78 +/- 21.64
51621 ncm-et-9 2018-08-29 03:49 01:17:05 1988454 500 264 17 219 +188.08 +/- 22.77
51620 ncm-et-3 2018-08-29 03:49 01:16:36 1990032 500 253 14 233 +180.8 +/- 21.87
51619 ncm-et-4 2018-08-29 03:47 01:17:01 1989401 500 268 19 213 +189.92 +/- 23.18
51618 ncm-et-15 2018-08-29 02:40 01:19:56 1951946 500 251 19 230 +174.55 +/- 22.16
51617 ncm-et-10 2018-08-29 02:36 01:21:28 1896172 500 236 12 252 +167.53 +/- 20.74
51616 ncm-et-13 2018-08-29 02:33 01:17:59 1985005 500 252 19 229 +175.44 +/- 22.22
51615 ncm-et-3 2018-08-29 02:30 01:17:11 1990192 500 265 18 217 +188.08 +/- 22.92
51614 ncm-et-9 2018-08-29 02:30 01:17:59 1990034 500 257 14 229 +184.42 +/- 22.1
51613 ncm-et-4 2018-08-29 02:29 01:17:19 1990982 500 251 11 238 +181.7 +/- 21.49

Commit

Commit ID e846a9306d6108fb24cb216689867777ac2b0c4f
Author protonspring
Date 2018-08-29 00:49:10 UTC
Remove PawnsOnBothFlanks It looks like PawnsOnBothFlanks can be removed from initiative(). A barrage of tests seem to confirm that the adjustment to -110 does not gain elo to offset any potential loss by removing PawnsOnBothFlanks. STC LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 22014 W: 4760 L: 4639 D: 12615 http://tests.stockfishchess.org/tests/view/5b7f50cc0ebc5902bdbb3a3e LTC LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 40561 W: 6667 L: 6577 D: 27317 http://tests.stockfishchess.org/tests/view/5b801f9f0ebc5902bdbb4467 The barrage of 0,4 tests on the -136 value are in my ps_tunetests branch. http://tests.stockfishchess.org/tests/user/protonspring Closes https://github.com/official-stockfish/Stockfish/pull/1751 Bench: 4413173 ------------- How to continue from there? The fact that endgames with all the pawns on only one flank are drawish is a well-known chess idea, so it seems quite strange that this can be removed so easily without losing Elo. In the past there had been attempts to improve on PawnsOnBothFlanks with similar concepts (for instance using the pawn span value), but the tests were at best neutral. Maybe Stockfish is now mature enough that these refined ideas would work to replace PawnsOnBothFlanks?
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