Dev Builds » 20211207-1715

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 11:08:53 1961784 3338 2903 4 431 +461.0 +/- 16.42
ncm-et-4 11:09:15 1966474 3351 2876 9 466 +443.52 +/- 15.8
ncm-et-9 11:09:03 1958047 3308 2821 5 482 +438.03 +/- 15.51
ncm-et-10 11:09:10 1955192 3320 2879 3 438 +457.89 +/- 16.28
ncm-et-13 11:09:10 1959989 3342 2887 7 448 +451.72 +/- 16.11
ncm-et-15 11:09:03 1958382 3341 2880 8 453 +448.85 +/- 16.02
20000 17246 36 2718 +450.02 +/- 6.53

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
154909 ncm-et-9 2021-12-08 06:53 01:02:52 1958623 308 263 1 44 +437.25 +/- 52.54
154908 ncm-et-10 2021-12-08 06:50 01:05:13 1953750 320 270 1 49 +425.02 +/- 49.62
154907 ncm-et-13 2021-12-08 06:47 01:08:32 1960166 342 293 0 49 +445.02 +/- 49.55
154906 ncm-et-3 2021-12-08 06:47 01:09:01 1955722 338 293 1 44 +454.63 +/- 52.58
154905 ncm-et-15 2021-12-08 06:46 01:09:34 1962613 341 284 1 56 +412.7 +/- 46.25
154904 ncm-et-4 2021-12-08 06:45 01:10:39 1975453 351 304 1 46 +453.73 +/- 51.36
154903 ncm-et-9 2021-12-08 05:12 01:40:19 1958779 500 438 1 61 +468.96 +/- 44.35
154902 ncm-et-10 2021-12-08 05:08 01:41:29 1950848 500 444 0 56 +490.71 +/- 46.32
154901 ncm-et-13 2021-12-08 05:08 01:38:54 1969863 500 432 2 66 +449.35 +/- 42.58
154900 ncm-et-3 2021-12-08 05:07 01:39:17 1961239 500 436 1 63 +463.16 +/- 43.6
154899 ncm-et-15 2021-12-08 05:07 01:38:42 1963698 500 418 2 80 +415.05 +/- 38.52
154898 ncm-et-4 2021-12-08 05:04 01:40:52 1967230 500 427 3 70 +433.94 +/- 41.3
154897 ncm-et-9 2021-12-08 03:30 01:41:01 1965695 500 422 0 78 +429.05 +/- 38.92
154896 ncm-et-10 2021-12-08 03:29 01:39:07 1963384 500 429 2 69 +441.5 +/- 41.61
154895 ncm-et-13 2021-12-08 03:28 01:38:51 1963015 500 436 2 62 +460.32 +/- 43.99
154894 ncm-et-15 2021-12-08 03:28 01:38:16 1961537 500 441 2 57 +474.93 +/- 45.97
154893 ncm-et-3 2021-12-08 03:26 01:39:57 1959854 500 431 0 69 +452.04 +/- 41.5
154892 ncm-et-4 2021-12-08 03:23 01:39:32 1963381 500 428 0 72 +444.08 +/- 40.59
154891 ncm-et-15 2021-12-08 01:47 01:39:51 1949637 500 424 0 76 +433.94 +/- 39.45
154890 ncm-et-10 2021-12-08 01:47 01:40:50 1953899 500 429 0 71 +446.7 +/- 40.89
154889 ncm-et-9 2021-12-08 01:46 01:43:08 1956955 500 430 0 70 +449.35 +/- 41.19
154888 ncm-et-13 2021-12-08 01:45 01:42:15 1944968 500 442 1 57 +481.1 +/- 45.96
154887 ncm-et-4 2021-12-08 01:44 01:38:23 1966460 500 426 2 72 +433.94 +/- 40.69
154886 ncm-et-3 2021-12-08 01:44 01:41:43 1951764 500 435 1 64 +460.32 +/- 43.24
154885 ncm-et-10 2021-12-08 00:05 01:41:10 1956182 500 437 0 63 +468.95 +/- 43.54
154884 ncm-et-4 2021-12-08 00:05 01:38:43 1966306 500 429 1 70 +444.09 +/- 41.26
154883 ncm-et-15 2021-12-08 00:05 01:41:40 1955465 500 438 1 61 +468.96 +/- 44.35
154882 ncm-et-3 2021-12-08 00:04 01:39:41 1968317 500 431 1 68 +449.35 +/- 41.89
154881 ncm-et-13 2021-12-08 00:03 01:42:08 1950531 500 424 1 75 +431.48 +/- 39.8
154880 ncm-et-9 2021-12-08 00:03 01:43:17 1936424 500 415 1 84 +410.58 +/- 37.5
154879 ncm-et-4 2021-12-07 22:25 01:39:30 1969239 500 431 1 68 +449.35 +/- 41.89
154878 ncm-et-15 2021-12-07 22:24 01:40:32 1957255 500 438 1 61 +468.96 +/- 44.35
154877 ncm-et-10 2021-12-07 22:23 01:41:33 1957714 500 433 0 67 +457.52 +/- 42.15
154876 ncm-et-3 2021-12-07 22:23 01:39:52 1974672 500 437 0 63 +468.95 +/- 43.54
154875 ncm-et-13 2021-12-07 22:23 01:39:02 1967232 500 432 1 67 +452.04 +/- 42.22
154874 ncm-et-9 2021-12-07 22:23 01:39:12 1961850 500 429 2 69 +441.5 +/- 41.61
154873 ncm-et-3 2021-12-07 20:43 01:39:22 1960921 500 440 0 60 +477.98 +/- 44.67
154872 ncm-et-13 2021-12-07 20:43 01:39:28 1964148 500 428 0 72 +444.08 +/- 40.59
154871 ncm-et-9 2021-12-07 20:43 01:39:14 1968008 500 424 0 76 +433.94 +/- 39.45
154870 ncm-et-15 2021-12-07 20:43 01:40:28 1958469 500 437 1 62 +466.04 +/- 43.97
154869 ncm-et-4 2021-12-07 20:43 01:41:36 1957249 500 431 1 68 +449.35 +/- 41.89
154868 ncm-et-10 2021-12-07 20:43 01:39:48 1950567 500 437 0 63 +468.95 +/- 43.54

Commit

Commit ID c228f3196ae9965250f317c8784012c2485228c4
Author Michael Chaly
Date 2021-12-07 17:15:06 UTC
Introduce post-lmr extensions This idea is somewhat similar to extentions in LMR but has a different flavour. If result of LMR was really good - thus exceeded alpha by some pretty big given margin, we can extend move after LMR in full depth search with 0 window. The idea is that this move is probably a fail high with somewhat of a big probability so extending it makes a lot of sense passed STC https://tests.stockfishchess.org/tests/view/61ad45ea56fcf33bce7d74b7 LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 59680 W: 15531 L: 15215 D: 28934 Ptnml(0-2): 193, 6711, 15734, 6991, 211 passed LTC https://tests.stockfishchess.org/tests/view/61ad9ff356fcf33bce7d8646 LLR: 2.95 (-2.94,2.94) <0.50,3.00> Total: 59104 W: 15321 L: 14992 D: 28791 Ptnml(0-2): 53, 6023, 17065, 6364, 47 closes https://github.com/official-stockfish/Stockfish/pull/3838 bench 4881329
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