Dev Builds » 20210925-2012

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 08:22:28 1958593 3315 2850 9 456 +445.41 +/- 15.97
ncm-et-4 08:22:27 1964663 3330 2836 6 488 +436.24 +/- 15.42
ncm-et-9 08:22:22 1962497 3372 2869 14 489 +432.32 +/- 15.42
ncm-et-10 08:22:24 1955591 3320 2819 2 499 +434.56 +/- 15.23
ncm-et-13 08:22:20 1959228 3330 2837 9 484 +435.49 +/- 15.49
ncm-et-15 08:22:11 1957439 3333 2891 5 437 +457.37 +/- 16.31
20000 17102 45 2853 +440.03 +/- 6.37

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
151910 ncm-et-10 2021-09-27 03:58 00:47:33 1964149 320 267 0 53 +417.74 +/- 47.47
151909 ncm-et-3 2021-09-27 03:57 00:48:36 1961382 315 267 0 48 +433.47 +/- 50.04
151908 ncm-et-13 2021-09-27 03:55 00:50:18 1951038 330 281 0 49 +438.33 +/- 49.52
151907 ncm-et-4 2021-09-27 03:55 00:50:30 1951306 330 280 1 49 +430.82 +/- 49.64
151906 ncm-et-15 2021-09-27 03:54 00:51:20 1948884 333 287 1 45 +447.84 +/- 51.95
151905 ncm-et-9 2021-09-27 03:51 00:54:58 1965078 372 319 3 50 +435.76 +/- 49.14
151904 ncm-et-10 2021-09-27 02:43 01:14:11 1949662 500 425 0 75 +436.43 +/- 39.73
151903 ncm-et-3 2021-09-27 02:42 01:14:27 1963846 500 438 0 62 +471.92 +/- 43.9
151902 ncm-et-4 2021-09-27 02:39 01:15:23 1967234 500 432 0 68 +454.76 +/- 41.82
151901 ncm-et-15 2021-09-27 02:39 01:14:45 1960924 500 432 1 67 +452.04 +/- 42.22
151900 ncm-et-13 2021-09-27 02:37 01:17:33 1957312 500 430 2 68 +444.09 +/- 41.92
151899 ncm-et-9 2021-09-27 02:35 01:14:58 1972651 500 425 1 74 +433.94 +/- 40.08
151898 ncm-et-3 2021-09-27 01:27 01:14:52 1962075 500 426 0 74 +438.95 +/- 40.01
151897 ncm-et-10 2021-09-27 01:26 01:16:22 1948731 500 430 1 69 +446.7 +/- 41.57
151896 ncm-et-4 2021-09-27 01:25 01:13:56 1970179 500 426 1 73 +436.43 +/- 40.36
151895 ncm-et-15 2021-09-27 01:23 01:14:58 1960772 500 436 0 64 +466.03 +/- 43.18
151894 ncm-et-13 2021-09-27 01:21 01:15:44 1961550 500 421 4 75 +417.32 +/- 39.84
151893 ncm-et-9 2021-09-27 01:20 01:14:41 1963538 500 418 3 79 +412.8 +/- 38.79
151892 ncm-et-3 2021-09-27 00:09 01:16:32 1954520 500 427 4 69 +431.48 +/- 41.59
151891 ncm-et-10 2021-09-27 00:09 01:17:05 1953895 500 417 0 83 +417.31 +/- 37.67
151890 ncm-et-4 2021-09-27 00:07 01:16:43 1958012 500 428 1 71 +441.5 +/- 40.95
151889 ncm-et-15 2021-09-27 00:06 01:16:47 1956026 500 421 2 77 +421.93 +/- 39.29
151888 ncm-et-9 2021-09-27 00:05 01:13:59 1959851 500 429 2 69 +441.5 +/- 41.61
151887 ncm-et-13 2021-09-27 00:05 01:15:20 1951004 500 420 2 78 +419.61 +/- 39.03
151886 ncm-et-3 2021-09-26 22:52 01:16:26 1948882 500 429 1 70 +444.09 +/- 41.26
151885 ncm-et-10 2021-09-26 22:52 01:16:28 1953747 500 416 0 84 +415.04 +/- 37.43
151884 ncm-et-9 2021-09-26 22:51 01:13:48 1960771 500 422 1 77 +426.65 +/- 39.25
151883 ncm-et-4 2021-09-26 22:51 01:16:07 1958109 500 421 1 78 +424.28 +/- 38.99
151882 ncm-et-15 2021-09-26 22:50 01:15:22 1956642 500 432 1 67 +452.04 +/- 42.22
151881 ncm-et-13 2021-09-26 22:49 01:15:03 1961231 500 428 0 72 +444.08 +/- 40.59
151880 ncm-et-10 2021-09-26 21:36 01:14:33 1960470 500 430 0 70 +449.35 +/- 41.19
151879 ncm-et-3 2021-09-26 21:35 01:16:33 1953899 500 427 1 72 +438.95 +/- 40.66
151878 ncm-et-13 2021-09-26 21:35 01:14:01 1967540 500 430 1 69 +446.7 +/- 41.57
151877 ncm-et-15 2021-09-26 21:35 01:14:48 1957291 500 433 0 67 +457.52 +/- 42.15
151876 ncm-et-4 2021-09-26 21:34 01:15:38 1970634 500 428 1 71 +441.5 +/- 40.95
151875 ncm-et-9 2021-09-26 21:34 01:16:14 1954973 500 430 2 68 +444.09 +/- 41.92
151874 ncm-et-15 2021-09-26 20:20 01:14:11 1961538 500 450 0 50 +511.49 +/- 49.18
151873 ncm-et-10 2021-09-26 20:20 01:16:12 1958485 500 434 1 65 +457.52 +/- 42.89
151872 ncm-et-9 2021-09-26 20:20 01:13:44 1960618 500 426 2 72 +433.94 +/- 40.69
151871 ncm-et-13 2021-09-26 20:20 01:14:21 1964927 500 427 0 73 +441.5 +/- 40.29
151870 ncm-et-4 2021-09-26 20:20 01:14:10 1977171 500 421 1 78 +424.28 +/- 38.99
151869 ncm-et-3 2021-09-26 20:19 01:15:02 1965547 500 436 3 61 +457.52 +/- 44.35

Commit

Commit ID 919da65d70f0041abbb0102133ed0abbf25b1af0
Author Stéphane Nicolet
Date 2021-09-25 20:12:17 UTC
Reduction instead of cutoff In master, during singular move analysis, when both the transposition value and a reduced search for the other moves seem to indicate a fail high, we heuristically prune the whole subtree and return an fail high score. This patch is a little bit more cautious in this case, and instead of the risky cutoff, we now search the ttMove with a reduced depth (by two plies). STC: https://tests.stockfishchess.org/tests/view/614dafe07bdc23e77ceb8a89 LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 46728 W: 11909 L: 11666 D: 23153 Ptnml(0-2): 181, 5288, 12168, 5561, 166 LTC: https://tests.stockfishchess.org/tests/view/614dc84abe4c07e0ecac3c95 LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 74520 W: 18809 L: 18450 D: 37261 Ptnml(0-2): 45, 7735, 21346, 8084, 50 closes https://github.com/official-stockfish/Stockfish/pull/3718 Bench: 5499262
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