Dev Builds » 20201108-0815

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 08:24:50 1959400 3307 2625 19 663 +370.44 +/- 13.22
ncm-et-4 08:22:31 1967514 3311 2601 15 695 +364.12 +/- 12.89
ncm-et-9 08:23:22 1962754 3330 2627 13 690 +367.67 +/- 12.94
ncm-et-10 08:26:44 1961153 3344 2535 14 795 +341.15 +/- 12.03
ncm-et-13 08:23:28 1961778 3358 2617 20 721 +357.4 +/- 12.67
ncm-et-15 08:25:47 1968926 3350 2616 20 714 +358.74 +/- 12.73
20000 15621 101 4278 +359.68 +/- 5.19

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
140613 ncm-et-3 2020-11-09 07:14 00:47:43 1958946 307 258 3 46 +413.49 +/- 51.29
140612 ncm-et-4 2020-11-09 07:14 00:47:28 1962776 311 247 2 62 +370.21 +/- 43.84
140611 ncm-et-9 2020-11-09 07:13 00:48:53 1969095 330 261 2 67 +367.54 +/- 42.11
140610 ncm-et-15 2020-11-09 07:09 00:52:38 1961230 350 270 5 75 +343.78 +/- 39.78
140609 ncm-et-10 2020-11-09 07:09 00:52:46 1957866 344 254 1 89 +326.77 +/- 36.14
140608 ncm-et-13 2020-11-09 07:08 00:54:02 1960614 358 274 0 84 +350.57 +/- 37.21
140607 ncm-et-4 2020-11-09 05:58 01:15:23 1946675 500 389 1 110 +359.68 +/- 32.55
140606 ncm-et-3 2020-11-09 05:57 01:16:39 1956044 500 388 1 111 +357.94 +/- 32.39
140605 ncm-et-9 2020-11-09 05:55 01:17:00 1926993 500 396 1 103 +372.25 +/- 33.69
140604 ncm-et-15 2020-11-09 05:53 01:15:12 1969706 500 407 2 91 +391.57 +/- 36.01
140603 ncm-et-10 2020-11-09 05:52 01:15:51 1955414 500 376 2 122 +336.46 +/- 30.86
140602 ncm-et-13 2020-11-09 05:52 01:15:31 1960615 500 381 5 114 +339.63 +/- 32.09
140601 ncm-et-3 2020-11-09 04:41 01:14:24 1962763 500 408 1 91 +395.65 +/- 35.96
140600 ncm-et-4 2020-11-09 04:41 01:15:51 1968158 500 398 1 101 +375.98 +/- 34.04
140599 ncm-et-9 2020-11-09 04:39 01:14:38 1968024 500 382 2 116 +346.12 +/- 31.7
140598 ncm-et-15 2020-11-09 04:37 01:15:29 1971579 500 398 5 97 +368.59 +/- 34.9
140597 ncm-et-10 2020-11-09 04:35 01:15:57 1965697 500 362 3 135 +313.91 +/- 29.29
140596 ncm-et-13 2020-11-09 04:35 01:15:51 1963839 500 387 2 111 +354.5 +/- 32.44
140595 ncm-et-9 2020-11-09 03:23 01:14:59 1974204 500 394 0 106 +370.41 +/- 33.12
140594 ncm-et-4 2020-11-09 03:23 01:16:31 1973298 500 393 2 105 +364.98 +/- 33.41
140593 ncm-et-3 2020-11-09 03:23 01:17:21 1957094 500 397 3 100 +370.41 +/- 34.31
140592 ncm-et-15 2020-11-09 03:20 01:15:43 1969415 500 395 1 104 +370.41 +/- 33.52
140591 ncm-et-10 2020-11-09 03:19 01:15:04 1964925 500 380 2 118 +342.85 +/- 31.41
140590 ncm-et-13 2020-11-09 03:19 01:14:23 1963075 500 398 4 98 +370.41 +/- 34.7
140589 ncm-et-9 2020-11-09 02:07 01:15:04 1964308 500 385 1 114 +352.8 +/- 31.94
140588 ncm-et-4 2020-11-09 02:06 01:16:13 1974680 500 394 2 104 +366.78 +/- 33.58
140587 ncm-et-13 2020-11-09 02:04 01:13:37 1962149 500 382 5 113 +341.24 +/- 32.24
140586 ncm-et-3 2020-11-09 02:04 01:17:25 1956649 500 387 5 108 +349.43 +/- 33.01
140585 ncm-et-10 2020-11-09 02:03 01:14:45 1963388 500 386 2 112 +352.8 +/- 32.29
140584 ncm-et-15 2020-11-09 02:03 01:16:05 1971426 500 386 0 114 +356.21 +/- 31.87
140583 ncm-et-9 2020-11-09 00:49 01:16:48 1969253 500 409 5 86 +389.56 +/- 37.13
140582 ncm-et-4 2020-11-09 00:49 01:15:51 1976070 500 394 3 103 +364.98 +/- 33.79
140581 ncm-et-13 2020-11-09 00:49 01:14:49 1961845 500 403 1 96 +385.59 +/- 34.96
140580 ncm-et-3 2020-11-09 00:47 01:16:15 1960465 500 388 5 107 +351.11 +/- 33.17
140579 ncm-et-10 2020-11-09 00:47 01:15:36 1960630 500 387 3 110 +352.8 +/- 32.64
140578 ncm-et-15 2020-11-09 00:46 01:15:28 1964301 500 381 2 117 +344.48 +/- 31.55
140577 ncm-et-4 2020-11-08 23:33 01:15:14 1970946 500 386 4 110 +349.43 +/- 32.67
140576 ncm-et-9 2020-11-08 23:32 01:16:00 1967406 500 400 2 98 +377.87 +/- 34.64
140575 ncm-et-13 2020-11-08 23:32 01:15:15 1960309 500 392 3 105 +361.43 +/- 33.45
140574 ncm-et-3 2020-11-08 23:31 01:15:03 1963840 500 399 1 100 +377.87 +/- 34.22
140573 ncm-et-15 2020-11-08 23:30 01:15:12 1974825 500 379 5 116 +336.46 +/- 31.8
140572 ncm-et-10 2020-11-08 23:29 01:16:45 1960156 500 390 1 109 +361.43 +/- 32.7

Commit

Commit ID 392b529c3f52103ad47ad096b86103c17758cb4f
Author Stéphane Nicolet
Date 2020-11-08 08:15:34 UTC
Qsearch pruning: follow-up This is a follow-up of the recent qsearch pruning patch in https://github.com/official-stockfish/Stockfish/commit/a260c9a8a24a2630a900efc3821000c3481b0c5d We now use the same guard condition (testing that we already have a defense with a score better score than a TB loss) for all pruning heuristics in qsearch(). This allows some pruning when in check, but in a controlled way to ensure that no wrong mate scores appear. Tested with Elo-gaining bounds: STC: LLR: 2.97 (-2.94,2.94) {-0.25,1.25} Total: 22632 W: 2433 L: 2264 D: 17935 Ptnml(0-2): 98, 1744, 7487, 1865, 122 https://tests.stockfishchess.org/tests/view/5fa59405936c54e11ec99515 LTC: LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 105432 W: 4965 L: 4648 D: 95819 Ptnml(0-2): 85, 4110, 44011, 4423, 87 https://tests.stockfishchess.org/tests/view/5fa5b609936c54e11ec9952a closes https://github.com/official-stockfish/Stockfish/pull/3221 Bench: 3578092
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