Dev Builds » 20180401-0019

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 06:02:44 2001732 2383 1100 64 1219 +161.81 +/- 9.42
ncm-et-4 06:02:46 1998501 2394 1095 72 1227 +158.64 +/- 9.4
ncm-et-5 01:47:52 2023203 715 328 27 360 +155.96 +/- 17.51
ncm-et-6 01:47:29 2027128 708 343 20 345 +171.12 +/- 17.86
ncm-et-7 01:48:07 1981073 715 337 16 362 +167.95 +/- 17.26
ncm-et-8 01:47:50 1948640 685 312 16 357 +160.69 +/- 17.31
ncm-et-9 06:02:55 2000776 2417 1127 61 1229 +164.52 +/- 9.38
ncm-et-10 06:02:48 1986695 2390 1087 71 1232 +157.7 +/- 9.37
ncm-et-11 01:47:39 2016453 714 330 20 364 +161.57 +/- 17.27
ncm-et-12 01:47:58 2007307 709 357 17 335 +181.5 +/- 18.14
ncm-et-13 06:02:39 1989802 2386 1108 72 1206 +161.58 +/- 9.51
ncm-et-14 01:47:56 2017504 712 313 20 379 +151.98 +/- 16.8
ncm-et-15 06:02:07 1979216 2350 1094 61 1195 +163.89 +/- 9.51
ncm-et-16 01:47:28 2012111 722 331 28 363 +155.4 +/- 17.45
20000 9262 565 10173 +161.86 +/- 3.26

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
51540 ncm-et-15 2018-08-28 12:24 00:18:47 1980446 124 57 2 65 +165.6 +/- 40.51
51539 ncm-et-13 2018-08-28 12:18 00:24:18 1986563 160 81 4 75 +182.27 +/- 38.62
51538 ncm-et-4 2018-08-28 12:15 00:26:55 1988298 179 80 6 93 +152.77 +/- 34.32
51537 ncm-et-3 2018-08-28 12:15 00:27:29 1991297 166 75 7 84 +151.2 +/- 36.47
51536 ncm-et-10 2018-08-28 12:14 00:28:03 1936501 176 80 5 91 +158.14 +/- 34.61
51535 ncm-et-9 2018-08-28 12:13 00:29:45 1989558 195 93 3 99 +173.46 +/- 32.91
51534 ncm-et-15 2018-08-28 11:05 01:17:15 1979661 500 243 14 243 +171.9 +/- 21.3
51533 ncm-et-13 2018-08-28 11:00 01:16:33 1984833 500 223 15 262 +153.86 +/- 20.3
51532 ncm-et-3 2018-08-28 10:58 01:15:33 1990665 500 232 15 253 +161.49 +/- 20.78
51531 ncm-et-4 2018-08-28 10:57 01:16:58 1989874 500 223 13 264 +155.54 +/- 20.14
51530 ncm-et-10 2018-08-28 10:57 01:16:05 1981538 500 237 14 249 +166.66 +/- 20.97
51529 ncm-et-9 2018-08-28 10:57 01:14:50 1985778 500 229 12 259 +161.49 +/- 20.37
51528 ncm-et-15 2018-08-28 09:46 01:18:09 1941261 500 235 12 253 +166.66 +/- 20.69
51527 ncm-et-13 2018-08-28 09:43 01:15:47 1967794 500 248 14 238 +176.33 +/- 21.58
51526 ncm-et-9 2018-08-28 09:41 01:14:29 1987981 500 240 15 245 +168.4 +/- 21.22
51525 ncm-et-3 2018-08-28 09:41 01:16:05 1990664 500 234 13 253 +164.93 +/- 20.72
51524 ncm-et-4 2018-08-28 09:40 01:16:07 1987508 500 232 14 254 +162.35 +/- 20.7
51523 ncm-et-10 2018-08-28 09:39 01:16:35 1980443 500 225 14 261 +156.39 +/- 20.33
51522 ncm-et-15 2018-08-28 08:24 01:20:29 1937138 500 221 10 269 +156.39 +/- 19.78
51521 ncm-et-3 2018-08-28 08:24 01:15:39 1989402 500 230 10 260 +164.07 +/- 20.25
51520 ncm-et-13 2018-08-28 08:24 01:18:06 1948806 500 234 20 246 +158.93 +/- 21.29
51519 ncm-et-4 2018-08-28 08:24 01:14:52 1989243 500 232 11 257 +164.93 +/- 20.44
51518 ncm-et-10 2018-08-28 08:24 01:14:09 1982948 500 208 13 279 +143.07 +/- 19.37
51517 ncm-et-9 2018-08-28 08:24 01:15:55 1990032 500 240 18 242 +165.8 +/- 21.46
14810 ncm-et-8 2018-04-03 06:28 00:28:02 1958284 185 80 3 102 +153.95 +/- 31.92
14809 ncm-et-6 2018-04-03 06:25 00:31:03 2027210 208 102 3 103 +179.88 +/- 32.36
14808 ncm-et-10 2018-04-03 06:24 00:31:56 2020836 214 94 6 114 +151.85 +/- 30.71
14807 ncm-et-14 2018-04-03 06:23 00:32:22 2015800 212 88 6 118 +141.76 +/- 29.92
14806 ncm-et-4 2018-04-03 06:23 00:32:22 2025735 215 103 7 105 +166.89 +/- 32.57
14805 ncm-et-12 2018-04-03 06:23 00:32:30 1995407 209 108 7 94 +183.18 +/- 34.78
14804 ncm-et-5 2018-04-03 06:23 00:32:51 2025244 215 99 10 106 +153.0 +/- 32.61
14803 ncm-et-3 2018-04-03 06:23 00:32:55 2023447 217 100 2 115 +169.11 +/- 30.08
14802 ncm-et-9 2018-04-03 06:22 00:33:16 2024917 222 91 5 126 +142.0 +/- 28.67
14801 ncm-et-11 2018-04-03 06:22 00:33:16 2017745 214 96 4 114 +159.74 +/- 30.47
14800 ncm-et-16 2018-04-03 06:22 00:33:33 2021977 222 101 7 114 +156.99 +/- 30.99
14799 ncm-et-13 2018-04-03 06:22 00:34:02 2025899 226 100 3 123 +159.45 +/- 29.04
14798 ncm-et-7 2018-04-03 06:22 00:34:13 1936410 215 107 1 107 +187.63 +/- 31.39
14797 ncm-et-15 2018-04-03 06:22 00:33:59 2017907 226 91 5 130 +139.21 +/- 28.11
14796 ncm-et-6 2018-04-03 05:07 01:16:26 2027046 500 241 17 242 +167.53 +/- 21.44
14795 ncm-et-16 2018-04-03 05:07 01:13:55 2002246 500 230 21 249 +154.7 +/- 21.15
14794 ncm-et-15 2018-04-03 05:07 01:13:28 2018883 500 247 18 235 +171.9 +/- 21.85
14793 ncm-et-11 2018-04-03 05:07 01:14:23 2015161 500 234 16 250 +162.35 +/- 20.97
14792 ncm-et-8 2018-04-03 05:07 01:19:48 1938997 500 232 13 255 +163.21 +/- 20.61
14791 ncm-et-10 2018-04-03 05:07 01:16:00 2017907 500 243 19 238 +167.53 +/- 21.71
14790 ncm-et-13 2018-04-03 05:07 01:13:53 2024922 500 222 16 262 +152.18 +/- 20.33
14789 ncm-et-9 2018-04-03 05:07 01:14:40 2026391 500 234 8 258 +169.27 +/- 20.28
14788 ncm-et-14 2018-04-03 05:07 01:15:34 2019209 500 225 14 261 +156.39 +/- 20.33
14787 ncm-et-4 2018-04-03 05:07 01:15:32 2010350 500 225 21 254 +150.51 +/- 20.88
14786 ncm-et-12 2018-04-03 05:07 01:15:28 2019208 500 249 10 241 +180.8 +/- 21.28
14785 ncm-et-5 2018-04-03 05:07 01:15:01 2021162 500 229 17 254 +157.24 +/- 20.78
14784 ncm-et-3 2018-04-03 05:07 01:15:03 2024917 500 229 17 254 +157.24 +/- 20.78
14783 ncm-et-7 2018-04-03 05:07 01:13:54 2025736 500 230 15 255 +159.78 +/- 20.67

Commit

Commit ID d9cac9a41492c3e54f3bb471606ec3a922a8ea0f
Author Stéphane Nicolet
Date 2018-04-01 00:19:42 UTC
Simplify KBPKB endgame with opposite bishops When we reach a position with only two opposite colored bishops and one pawn on the board, current master would give it a scale factor of 9/64=0.14 in about one position out of 7200, and a scale factor of 0.0 in the 7199 others. The patch gives a scale factor of 0.0 in 100% of the cases. STC: LLR: 2.96 (-2.94,2.94) [-3.00,1.00] Total: 55845 W: 11467 L: 11410 D: 32968 http://tests.stockfishchess.org/tests/view/5abc585f0ebc5902926cf15e LTC: LLR: 2.95 (-2.94,2.94) [-3.00,1.00] Total: 11915 W: 1852 L: 1719 D: 8344 http://tests.stockfishchess.org/tests/view/5abc7f750ebc5902926cf18c We also have exhaustive coverage analysis of this patch effect by Alain Savard, comparing the perfect evaluation given by the Syzygy tablebase with the heuristic play after this patch for the set of all legal positions of the KBPKP endgame with opposite bishops, in the comments thread for this pull request: https://github.com/official-stockfish/Stockfish/pull/1520 Alain's conclusion: > According to this definition and the data, I consider this PR is > identical to master to "solve for draw" and slightly better than > master to solve earlier for "wins". Note: this patch is a side effect of an ongoing effort to improve the evaluation of positions involving a pair of opposite bishops. See the GitHub diff of this LTC test which almost passed at sprt[0..5] for a discussion: http://tests.stockfishchess.org/tests/view/5ab9030b0ebc5902932cbf93 No functional change (at small bench depths)
Copyright 2011–2024 Next Chess Move LLC