Dev Builds » 20210220-2149

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 08:21:38 1960102 3331 2689 20 622 +382.92 +/- 13.66
ncm-et-4 08:21:37 1959304 3334 2671 11 652 +379.62 +/- 13.31
ncm-et-9 08:21:31 1955652 3317 2619 17 681 +367.18 +/- 13.03
ncm-et-10 08:21:37 1957311 3343 2661 18 664 +372.82 +/- 13.21
ncm-et-13 08:21:49 1964015 3355 2650 13 692 +368.58 +/- 12.92
ncm-et-15 08:21:42 1955784 3320 2689 14 617 +387.29 +/- 13.7
20000 15979 93 3928 +376.26 +/- 5.42

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
144782 ncm-et-9 2021-02-21 05:50 00:47:12 1968932 317 263 0 54 +412.41 +/- 46.99
144781 ncm-et-15 2021-02-21 05:48 00:49:34 1948134 320 261 2 57 +390.94 +/- 45.85
144780 ncm-et-3 2021-02-21 05:48 00:49:32 1960009 331 273 1 57 +403.79 +/- 45.8
144779 ncm-et-4 2021-02-21 05:47 00:50:01 1963241 334 263 0 71 +369.88 +/- 40.64
144778 ncm-et-10 2021-02-21 05:45 00:52:06 1950864 343 273 2 68 +372.33 +/- 41.8
144777 ncm-et-13 2021-02-21 05:42 00:55:19 1956972 355 271 2 82 +344.27 +/- 37.87
144776 ncm-et-9 2021-02-21 04:35 01:15:01 1959388 500 397 0 103 +375.98 +/- 33.63
144775 ncm-et-3 2021-02-21 04:33 01:14:34 1964321 500 397 5 98 +366.78 +/- 34.71
144774 ncm-et-4 2021-02-21 04:32 01:14:35 1964311 500 405 2 93 +387.57 +/- 35.6
144773 ncm-et-15 2021-02-21 04:32 01:15:08 1960615 500 410 3 87 +395.65 +/- 36.9
144772 ncm-et-10 2021-02-21 04:30 01:14:20 1960615 500 391 1 108 +363.2 +/- 32.86
144771 ncm-et-13 2021-02-21 04:26 01:15:11 1960929 500 400 1 99 +379.78 +/- 34.4
144770 ncm-et-9 2021-02-21 03:18 01:16:04 1957102 500 388 2 110 +356.21 +/- 32.6
144769 ncm-et-15 2021-02-21 03:17 01:14:41 1962611 500 401 2 97 +379.78 +/- 34.83
144768 ncm-et-3 2021-02-21 03:16 01:16:18 1957726 500 402 5 93 +375.98 +/- 35.66
144767 ncm-et-4 2021-02-21 03:15 01:16:22 1944564 500 413 1 86 +406.2 +/- 37.04
144766 ncm-et-10 2021-02-21 03:14 01:15:39 1963071 500 385 2 113 +351.11 +/- 32.14
144765 ncm-et-13 2021-02-21 03:11 01:14:40 1970495 500 391 4 105 +357.94 +/- 33.48
144764 ncm-et-9 2021-02-21 02:01 01:16:14 1953747 500 391 3 106 +359.68 +/- 33.28
144763 ncm-et-15 2021-02-21 02:00 01:15:53 1953435 500 406 2 92 +389.56 +/- 35.8
144762 ncm-et-10 2021-02-21 02:00 01:13:16 1965538 500 398 2 100 +374.11 +/- 34.27
144761 ncm-et-3 2021-02-21 02:00 01:15:24 1961873 500 406 4 90 +385.59 +/- 36.27
144760 ncm-et-4 2021-02-21 01:59 01:15:16 1967247 500 392 2 106 +363.2 +/- 33.24
144759 ncm-et-13 2021-02-21 01:57 01:13:52 1961395 500 386 1 113 +354.5 +/- 32.09
144758 ncm-et-15 2021-02-21 00:46 01:13:53 1950559 500 399 3 98 +374.11 +/- 34.68
144757 ncm-et-9 2021-02-21 00:44 01:16:17 1939558 500 389 5 106 +352.8 +/- 33.33
144756 ncm-et-10 2021-02-21 00:44 01:15:58 1951309 500 396 4 100 +366.78 +/- 34.34
144755 ncm-et-3 2021-02-21 00:43 01:15:39 1945012 500 395 3 102 +366.78 +/- 33.96
144754 ncm-et-4 2021-02-21 00:43 01:15:28 1951155 500 404 4 92 +381.7 +/- 35.86
144753 ncm-et-13 2021-02-21 00:43 01:13:19 1971253 500 396 1 103 +372.25 +/- 33.69
144752 ncm-et-15 2021-02-20 23:29 01:15:57 1958645 500 409 0 91 +399.81 +/- 35.89
144751 ncm-et-3 2021-02-20 23:29 01:13:55 1974673 500 402 1 97 +383.64 +/- 34.77
144750 ncm-et-10 2021-02-20 23:28 01:14:39 1958470 500 400 4 96 +374.11 +/- 35.07
144749 ncm-et-13 2021-02-20 23:28 01:14:11 1963070 500 401 0 99 +383.63 +/- 34.34
144748 ncm-et-9 2021-02-20 23:28 01:15:28 1954349 500 400 7 93 +368.59 +/- 35.65
144747 ncm-et-4 2021-02-20 23:28 01:14:36 1960769 500 413 0 87 +408.38 +/- 36.75
144746 ncm-et-9 2021-02-20 22:12 01:15:15 1956490 500 391 0 109 +364.98 +/- 32.64
144745 ncm-et-13 2021-02-20 22:12 01:15:17 1963994 500 405 4 91 +383.64 +/- 36.06
144744 ncm-et-3 2021-02-20 22:12 01:16:16 1957102 500 414 1 85 +408.38 +/- 37.27
144743 ncm-et-10 2021-02-20 22:12 01:15:39 1951313 500 418 3 79 +412.8 +/- 38.79
144742 ncm-et-15 2021-02-20 22:12 01:16:36 1956489 500 403 2 95 +383.64 +/- 35.21
144741 ncm-et-4 2021-02-20 22:12 01:15:19 1963844 500 381 2 117 +344.48 +/- 31.55

Commit

Commit ID 7c30091a92abddb8265e53768b32751c49642040
Author Vizvezdenec
Date 2021-02-20 21:49:39 UTC
Introduce ProbCut for check evasions The idea of this patch can be described as follows: if we are in check and the transposition table move is a capture that returns a value far above beta, we can assume that the opponent just blundered a piece by giving check, and we return the transposition table value. This is similar to the usual probCut logic for quiet moves, but with a different threshold. Passed STC LLR: 2.94 (-2.94,2.94) {-0.25,1.25} Total: 33440 W: 3056 L: 2891 D: 27493 Ptnml(0-2): 110, 2338, 11672, 2477, 123 https://tests.stockfishchess.org/tests/view/602cd1087f517a561bc49bda Passed LTC LLR: 2.98 (-2.94,2.94) {0.25,1.25} Total: 10072 W: 401 L: 309 D: 9362 Ptnml(0-2): 2, 288, 4365, 378, 3 https://tests.stockfishchess.org/tests/view/602ceea57f517a561bc49bf0 The committed version has an additional fix to never return unproven wins in the tablebase range or the mate range. This fix passed tests for non- regression at STC and LTC: STC: LLR: 2.93 (-2.94,2.94) {-1.25,0.25} Total: 26240 W: 2354 L: 2280 D: 21606 Ptnml(0-2): 85, 1763, 9372, 1793, 107 https://tests.stockfishchess.org/tests/view/602d86a87f517a561bc49c7a LTC: LLR: 2.95 (-2.94,2.94) {-0.75,0.25} Total: 35304 W: 1299 L: 1256 D: 32749 Ptnml(0-2): 14, 1095, 15395, 1130, 18 https://tests.stockfishchess.org/tests/view/602d98d17f517a561bc49c83 Closes https://github.com/official-stockfish/Stockfish/pull/3362 Bench: 3830215
Copyright 2011–2024 Next Chess Move LLC