Dev Builds » 20210211-2239

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 08:19:47 1964225 3354 2681 17 656 +376.24 +/- 13.29
ncm-et-4 08:19:29 1962527 3335 2676 19 640 +378.54 +/- 13.46
ncm-et-9 08:19:41 1959180 3329 2709 17 603 +390.21 +/- 13.87
ncm-et-10 08:19:38 1961002 3336 2690 14 632 +383.79 +/- 13.54
ncm-et-13 08:19:38 1962173 3347 2661 15 671 +372.77 +/- 13.13
ncm-et-15 08:19:37 1957663 3299 2629 13 657 +375.01 +/- 13.27
20000 16046 95 3859 +379.35 +/- 5.47

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
143287 ncm-et-15 2021-02-12 20:18 00:44:48 1962775 299 240 2 57 +377.86 +/- 45.82
143286 ncm-et-4 2021-02-12 20:13 00:50:05 1963071 335 269 2 64 +378.84 +/- 43.15
143285 ncm-et-9 2021-02-12 20:12 00:50:44 1947524 329 253 1 75 +351.07 +/- 39.57
143284 ncm-et-10 2021-02-12 20:11 00:51:25 1960042 336 284 0 52 +430.55 +/- 47.99
143283 ncm-et-13 2021-02-12 20:09 00:53:36 1943641 347 273 0 74 +369.26 +/- 39.79
143282 ncm-et-3 2021-02-12 20:09 00:53:47 1962469 354 287 2 65 +386.66 +/- 42.82
143281 ncm-et-15 2021-02-12 19:01 01:16:03 1953440 500 398 1 101 +375.98 +/- 34.04
143280 ncm-et-4 2021-02-12 18:57 01:14:58 1945846 500 395 3 102 +366.78 +/- 33.96
143279 ncm-et-10 2021-02-12 18:56 01:14:58 1959856 500 405 1 94 +389.56 +/- 35.35
143278 ncm-et-9 2021-02-12 18:56 01:15:51 1954499 500 404 1 95 +387.57 +/- 35.16
143277 ncm-et-13 2021-02-12 18:55 01:13:55 1965697 500 413 3 84 +401.92 +/- 37.57
143276 ncm-et-3 2021-02-12 18:54 01:14:09 1972341 500 405 0 95 +391.57 +/- 35.09
143275 ncm-et-15 2021-02-12 17:44 01:16:33 1950751 500 393 3 104 +363.2 +/- 33.62
143274 ncm-et-10 2021-02-12 17:41 01:13:39 1962026 500 405 2 93 +387.57 +/- 35.6
143273 ncm-et-4 2021-02-12 17:41 01:15:03 1963091 500 409 3 88 +393.6 +/- 36.68
143272 ncm-et-9 2021-02-12 17:40 01:14:28 1972072 500 409 4 87 +391.57 +/- 36.91
143271 ncm-et-13 2021-02-12 17:40 01:14:05 1967076 500 392 3 105 +361.43 +/- 33.45
143270 ncm-et-3 2021-02-12 17:40 01:14:11 1960006 500 403 4 93 +379.78 +/- 35.66
143269 ncm-et-15 2021-02-12 16:30 01:13:54 1966884 500 392 2 106 +363.2 +/- 33.24
143268 ncm-et-10 2021-02-12 16:26 01:14:35 1960157 500 408 1 91 +395.65 +/- 35.96
143267 ncm-et-4 2021-02-12 16:26 01:14:54 1978409 500 385 2 113 +351.11 +/- 32.14
143266 ncm-et-9 2021-02-12 16:26 01:13:54 1960316 500 413 3 84 +401.92 +/- 37.57
143265 ncm-et-3 2021-02-12 16:26 01:13:19 1964458 500 397 3 100 +370.41 +/- 34.31
143264 ncm-et-13 2021-02-12 16:25 01:13:47 1964458 500 394 3 103 +364.98 +/- 33.79
143263 ncm-et-15 2021-02-12 15:12 01:16:41 1952529 500 398 2 100 +374.11 +/- 34.27
143262 ncm-et-13 2021-02-12 15:12 01:13:10 1969707 500 389 3 108 +356.21 +/- 32.96
143261 ncm-et-3 2021-02-12 15:11 01:14:04 1963541 500 396 3 101 +368.59 +/- 34.13
143260 ncm-et-4 2021-02-12 15:11 01:14:31 1967698 500 404 4 92 +381.7 +/- 35.86
143259 ncm-et-10 2021-02-12 15:10 01:15:27 1959395 500 383 5 112 +342.85 +/- 32.39
143258 ncm-et-9 2021-02-12 15:10 01:15:44 1958930 500 414 3 83 +404.05 +/- 37.81
143257 ncm-et-4 2021-02-12 13:56 01:13:54 1965689 500 408 3 89 +391.57 +/- 36.46
143256 ncm-et-13 2021-02-12 13:56 01:15:03 1959716 500 402 1 97 +383.64 +/- 34.77
143255 ncm-et-3 2021-02-12 13:56 01:14:20 1962768 500 402 2 96 +381.7 +/- 35.02
143254 ncm-et-10 2021-02-12 13:55 01:14:45 1961843 500 396 3 101 +368.59 +/- 34.13
143253 ncm-et-15 2021-02-12 13:54 01:17:12 1954502 500 412 2 86 +401.92 +/- 37.09
143252 ncm-et-9 2021-02-12 13:54 01:14:39 1961382 500 410 2 88 +397.72 +/- 36.65
143251 ncm-et-4 2021-02-12 12:40 01:16:04 1953889 500 406 2 92 +389.56 +/- 35.8
143250 ncm-et-15 2021-02-12 12:39 01:14:26 1962764 500 396 1 103 +372.25 +/- 33.69
143249 ncm-et-13 2021-02-12 12:39 01:16:02 1964919 500 398 2 100 +374.11 +/- 34.27
143248 ncm-et-10 2021-02-12 12:39 01:14:49 1963700 500 409 2 89 +395.65 +/- 36.43
143247 ncm-et-3 2021-02-12 12:39 01:15:57 1963993 500 391 3 106 +359.68 +/- 33.28
143246 ncm-et-9 2021-02-12 12:39 01:14:21 1959543 500 406 3 91 +387.57 +/- 36.04

Commit

Commit ID 76daa88cf878b12a03755dc0550b3fa8e4d19cb1
Author Vizvezdenec
Date 2021-02-11 22:39:06 UTC
PV-Nodes likely to fail low Do not decrease reduction at pv-nodes which are likely to fail low. The idea of this patch can be described as following: during the search, if a node on the principal variation was re-searched in non-pv search and this re-search got a value which was much lower than alpha, then we can assume that this pv-node is likely to fail low again, and we can reduce more aggressively at this node. Passed STC https://tests.stockfishchess.org/tests/view/6023a5fa7f517a561bc49638 LLR: 2.95 (-2.94,2.94) {-0.25,1.25} Total: 70288 W: 6443 L: 6223 D: 57622 Ptnml(0-2): 239, 5022, 24436, 5174, 273 Passed LTC https://tests.stockfishchess.org/tests/view/6023f2617f517a561bc49661 LLR: 2.94 (-2.94,2.94) {0.25,1.25} Total: 105656 W: 4048 L: 3748 D: 97860 Ptnml(0-2): 67, 3312, 45761, 3630, 58 Closes https://github.com/official-stockfish/Stockfish/pull/3349 Bench: 3766422
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