Dev Builds » 20201102-1841

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 08:23:06 1961428 3320 2634 23 663 +368.99 +/- 13.23
ncm-et-4 08:22:58 1968058 3320 2578 26 716 +353.37 +/- 12.72
ncm-et-9 08:23:06 1966776 3349 2650 21 678 +367.69 +/- 13.07
ncm-et-10 08:23:30 1963325 3325 2582 15 728 +356.24 +/- 12.59
ncm-et-13 08:23:25 1962963 3330 2594 20 716 +357.05 +/- 12.71
ncm-et-15 08:23:35 1970445 3356 2577 18 761 +348.2 +/- 12.31
20000 15615 123 4262 +358.46 +/- 5.21

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
140337 ncm-et-3 2020-11-03 13:38 00:48:42 1960921 320 237 2 81 +325.95 +/- 38.04
140336 ncm-et-4 2020-11-03 13:38 00:49:23 1967540 320 258 3 59 +378.7 +/- 45.05
140335 ncm-et-10 2020-11-03 13:37 00:50:07 1968313 325 258 2 65 +370.13 +/- 42.78
140334 ncm-et-13 2020-11-03 13:37 00:50:16 1963531 330 263 0 67 +378.79 +/- 41.91
140333 ncm-et-9 2020-11-03 13:34 00:52:33 1965238 349 271 2 76 +355.16 +/- 39.42
140332 ncm-et-15 2020-11-03 13:33 00:53:59 1970179 356 275 1 80 +354.21 +/- 38.29
140331 ncm-et-3 2020-11-03 12:21 01:15:49 1961231 500 409 3 88 +393.6 +/- 36.68
140330 ncm-et-10 2020-11-03 12:21 01:14:51 1966005 500 390 1 109 +361.43 +/- 32.7
140329 ncm-et-13 2020-11-03 12:21 01:15:12 1961383 500 377 7 116 +330.23 +/- 31.84
140328 ncm-et-4 2020-11-03 12:21 01:16:20 1970670 500 405 2 93 +387.57 +/- 35.6
140327 ncm-et-15 2020-11-03 12:18 01:13:53 1968947 500 401 4 95 +375.98 +/- 35.27
140326 ncm-et-9 2020-11-03 12:18 01:15:11 1968624 500 389 3 108 +356.21 +/- 32.96
140325 ncm-et-10 2020-11-03 11:05 01:14:49 1959848 500 389 0 111 +361.43 +/- 32.32
140324 ncm-et-13 2020-11-03 11:05 01:14:55 1964455 500 393 4 103 +361.43 +/- 33.81
140323 ncm-et-3 2020-11-03 11:03 01:16:56 1961844 500 389 4 107 +354.5 +/- 33.15
140322 ncm-et-15 2020-11-03 11:03 01:14:07 1974214 500 387 3 110 +352.8 +/- 32.64
140321 ncm-et-4 2020-11-03 11:03 01:16:22 1966613 500 399 5 96 +370.41 +/- 35.09
140320 ncm-et-9 2020-11-03 11:01 01:15:50 1968168 500 407 4 89 +387.57 +/- 36.48
140319 ncm-et-13 2020-11-03 09:48 01:15:20 1966305 500 398 1 101 +375.98 +/- 34.04
140318 ncm-et-10 2020-11-03 09:48 01:16:01 1962616 500 390 7 103 +351.11 +/- 33.84
140317 ncm-et-4 2020-11-03 09:48 01:14:27 1964763 500 383 3 114 +346.12 +/- 32.03
140316 ncm-et-3 2020-11-03 09:47 01:14:45 1962609 500 394 3 103 +364.98 +/- 33.79
140315 ncm-et-15 2020-11-03 09:46 01:16:06 1968479 500 384 1 115 +351.11 +/- 31.79
140314 ncm-et-9 2020-11-03 09:44 01:16:01 1968938 500 403 4 93 +379.78 +/- 35.66
140313 ncm-et-10 2020-11-03 08:32 01:15:31 1959092 500 381 0 119 +347.77 +/- 31.15
140312 ncm-et-4 2020-11-03 08:31 01:15:53 1965692 500 380 6 114 +336.46 +/- 32.11
140311 ncm-et-15 2020-11-03 08:31 01:14:20 1969705 500 376 2 122 +336.46 +/- 30.86
140310 ncm-et-13 2020-11-03 08:30 01:16:58 1963689 500 387 2 111 +354.5 +/- 32.44
140309 ncm-et-3 2020-11-03 08:30 01:16:35 1960922 500 406 0 94 +393.6 +/- 35.29
140308 ncm-et-9 2020-11-03 08:28 01:15:01 1967552 500 397 3 100 +370.41 +/- 34.31
140307 ncm-et-13 2020-11-03 07:15 01:13:44 1961535 500 393 2 105 +364.98 +/- 33.41
140306 ncm-et-10 2020-11-03 07:14 01:16:40 1965241 500 383 3 114 +346.12 +/- 32.03
140305 ncm-et-3 2020-11-03 07:14 01:15:00 1962775 500 390 9 101 +347.77 +/- 34.16
140304 ncm-et-15 2020-11-03 07:14 01:15:49 1968315 500 368 4 128 +321.19 +/- 30.17
140303 ncm-et-4 2020-11-03 07:14 01:15:53 1968326 500 380 2 118 +342.85 +/- 31.41
140302 ncm-et-9 2020-11-03 07:13 01:14:13 1963533 500 383 2 115 +347.77 +/- 31.84
140301 ncm-et-4 2020-11-03 05:58 01:14:40 1972806 500 373 5 122 +327.18 +/- 30.97
140300 ncm-et-9 2020-11-03 05:57 01:14:17 1965381 500 400 3 97 +375.98 +/- 34.86
140299 ncm-et-13 2020-11-03 05:57 01:17:00 1959849 500 383 4 113 +344.48 +/- 32.22
140298 ncm-et-3 2020-11-03 05:57 01:15:19 1959695 500 409 2 89 +395.65 +/- 36.43
140297 ncm-et-10 2020-11-03 05:57 01:15:31 1962165 500 391 2 107 +361.43 +/- 33.08
140296 ncm-et-15 2020-11-03 05:57 01:15:21 1973279 500 386 3 111 +351.11 +/- 32.49

Commit

Commit ID a260c9a8a24a2630a900efc3821000c3481b0c5d
Author J. Oster
Date 2020-11-02 18:41:17 UTC
Fix incorrect pruning in qsearch Only do countermove based pruning in qsearch if we already have a move with a better score than a TB loss. This patch fixes a bug (started as 843a961) that incorrectly prunes moves if in check, and adds an assert to make sure no wrong mate scores are given in the future. It replaces a no-op moveCount check with a check for bestValue. Initially discussed in #3171 and later in #3199, #3198 and #3210. This PR effectively closes #3171 It also likely fixes #3196 where this causes user visible incorrect TB scores, which probably result from these incorrect mate scores. Passed STC and LTC non-regression tests. https://tests.stockfishchess.org/tests/view/5f9ef8dabca9bf35bae7f648 LLR: 2.93 (-2.94,2.94) {-1.25,0.25} Total: 21672 W: 2339 L: 2230 D: 17103 Ptnml(0-2): 126, 1689, 7083, 1826, 112 https://tests.stockfishchess.org/tests/view/5f9f0caebca9bf35bae7f666 LLR: 2.97 (-2.94,2.94) {-0.75,0.25} Total: 33152 W: 1551 L: 1485 D: 30116 Ptnml(0-2): 27, 1308, 13832, 1390, 19 closes https://github.com/official-stockfish/Stockfish/pull/3214 Bench: 3625915
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