Dev Builds » 20210611-1833

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 08:16:27 1965328 3362 2698 13 651 +380.38 +/- 13.33
ncm-et-4 08:16:26 1960719 3315 2676 12 627 +385.22 +/- 13.59
ncm-et-9 08:16:36 1956721 3322 2689 16 617 +386.22 +/- 13.71
ncm-et-10 08:16:28 1954123 3324 2700 12 612 +390.22 +/- 13.76
ncm-et-13 08:16:50 1963692 3372 2720 16 636 +383.54 +/- 13.5
ncm-et-15 08:16:36 1954486 3305 2687 16 602 +389.73 +/- 13.88
20000 16170 85 3745 +385.84 +/- 5.55

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
148411 ncm-et-15 2021-06-12 02:54 00:45:37 1963233 305 251 2 52 +398.13 +/- 48.11
148410 ncm-et-4 2021-06-12 02:52 00:46:43 1963076 315 256 0 59 +394.31 +/- 44.82
148409 ncm-et-9 2021-06-12 02:50 00:49:06 1957141 322 263 3 56 +389.01 +/- 46.29
148408 ncm-et-10 2021-06-12 02:50 00:49:02 1953889 324 253 2 69 +358.54 +/- 41.45
148407 ncm-et-3 2021-06-12 02:45 00:54:09 1975604 362 294 5 63 +380.1 +/- 43.51
148406 ncm-et-13 2021-06-12 02:44 00:54:54 1966325 372 302 2 68 +388.01 +/- 41.83
148405 ncm-et-15 2021-06-12 01:38 01:15:12 1940201 500 421 1 78 +424.28 +/- 38.99
148404 ncm-et-4 2021-06-12 01:37 01:14:26 1959544 500 411 2 87 +399.81 +/- 36.87
148403 ncm-et-9 2021-06-12 01:34 01:15:39 1948425 500 401 1 98 +381.7 +/- 34.59
148402 ncm-et-10 2021-06-12 01:34 01:15:43 1939213 500 407 1 92 +393.6 +/- 35.75
148401 ncm-et-3 2021-06-12 01:31 01:13:09 1963718 500 395 0 105 +372.25 +/- 33.29
148400 ncm-et-13 2021-06-12 01:30 01:13:42 1952689 500 406 0 94 +393.6 +/- 35.29
148399 ncm-et-15 2021-06-12 00:22 01:14:54 1955297 500 395 3 102 +366.78 +/- 33.96
148398 ncm-et-9 2021-06-12 00:20 01:12:51 1967883 500 400 4 96 +374.11 +/- 35.07
148397 ncm-et-4 2021-06-12 00:20 01:16:41 1948909 500 396 2 102 +370.41 +/- 33.92
148396 ncm-et-10 2021-06-12 00:17 01:15:28 1957707 500 414 1 85 +408.38 +/- 37.27
148395 ncm-et-3 2021-06-12 00:17 01:13:19 1966922 500 400 3 97 +375.98 +/- 34.86
148394 ncm-et-13 2021-06-12 00:14 01:15:25 1959103 500 410 2 88 +397.72 +/- 36.65
148393 ncm-et-15 2021-06-11 23:06 01:15:59 1954867 500 410 2 88 +397.72 +/- 36.65
148392 ncm-et-9 2021-06-11 23:05 01:14:34 1947982 500 394 3 103 +364.98 +/- 33.79
148391 ncm-et-4 2021-06-11 23:03 01:15:48 1958623 500 389 2 109 +357.94 +/- 32.76
148390 ncm-et-10 2021-06-11 23:03 01:13:36 1962800 500 404 2 94 +385.59 +/- 35.4
148389 ncm-et-3 2021-06-11 23:03 01:13:11 1966617 500 404 3 93 +383.64 +/- 35.64
148388 ncm-et-13 2021-06-11 23:00 01:13:19 1962621 500 409 1 90 +397.72 +/- 36.17
148387 ncm-et-15 2021-06-11 21:50 01:14:30 1959096 500 405 1 94 +389.56 +/- 35.35
148386 ncm-et-9 2021-06-11 21:50 01:14:25 1960483 500 418 2 80 +415.05 +/- 38.52
148385 ncm-et-4 2021-06-11 21:50 01:13:04 1968003 500 413 1 86 +406.2 +/- 37.04
148384 ncm-et-3 2021-06-11 21:50 01:13:06 1970635 500 400 2 98 +377.87 +/- 34.64
148383 ncm-et-10 2021-06-11 21:49 01:13:08 1961999 500 414 3 83 +404.05 +/- 37.81
148382 ncm-et-13 2021-06-11 21:47 01:12:42 1969559 500 402 5 93 +375.98 +/- 35.66
148381 ncm-et-15 2021-06-11 20:35 01:15:15 1958316 500 403 4 93 +379.78 +/- 35.66
148380 ncm-et-9 2021-06-11 20:34 01:14:53 1956048 500 413 1 86 +406.2 +/- 37.04
148379 ncm-et-3 2021-06-11 20:33 01:15:24 1951645 500 404 0 96 +389.56 +/- 34.9
148378 ncm-et-10 2021-06-11 20:33 01:16:01 1947381 500 414 2 84 +406.2 +/- 37.55
148377 ncm-et-13 2021-06-11 20:33 01:13:30 1967233 500 406 3 91 +387.57 +/- 36.04
148376 ncm-et-4 2021-06-11 20:33 01:16:33 1958723 500 421 1 78 +424.28 +/- 38.99
148375 ncm-et-4 2021-06-11 19:19 01:13:11 1968158 500 390 4 106 +356.21 +/- 33.31
148374 ncm-et-15 2021-06-11 19:19 01:15:09 1950393 500 402 3 95 +379.78 +/- 35.24
148373 ncm-et-9 2021-06-11 19:19 01:15:08 1959088 500 400 2 98 +377.87 +/- 34.64
148372 ncm-et-10 2021-06-11 19:19 01:13:30 1955872 500 394 1 105 +368.59 +/- 33.35
148371 ncm-et-3 2021-06-11 19:19 01:14:09 1962157 500 401 0 99 +383.63 +/- 34.34
148370 ncm-et-13 2021-06-11 19:19 01:13:18 1968314 500 385 3 112 +349.43 +/- 32.33

Commit

Commit ID 559942d64de9497c9d6d13b22307b4b9e1ce8ecf
Author Joost VandeVondele
Date 2021-06-11 18:33:24 UTC
Limit double extensions Double extensions can lead to search explosions, for specific positions. Currently, however, these double extensions are worth about 10Elo and cannot be removed. This patch instead limits the number of double extensions given to a maximum of 3. This fixes https://github.com/official-stockfish/Stockfish/issues/3532 where the following testcase was shown to be problematic: ``` uci setoption name Hash value 4 setoption name Contempt value 0 ucinewgame position fen 8/Pk6/8/1p6/8/P1K5/8/6B1 w - - 37 130 go depth 20 ``` passed STC: https://tests.stockfishchess.org/tests/view/60c13161457376eb8bcaaa0f LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 73256 W: 6114 L: 6062 D: 61080 Ptnml(0-2): 222, 4912, 26306, 4968, 220 passed LTC: https://tests.stockfishchess.org/tests/view/60c196fb457376eb8bcaaa6b LLR: 2.94 (-2.94,2.94) <-2.50,0.50> Total: 166440 W: 5559 L: 5594 D: 155287 Ptnml(0-2): 106, 4921, 73197, 4894, 102 closes https://github.com/official-stockfish/Stockfish/pull/3544 Bench: 5067605
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