Dev Builds » 20211009-0759

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 12:36:50 1962877 5005 4258 10 737 +434.87 +/- 12.54
ncm-et-10 12:37:35 1956731 4995 4264 7 724 +439.27 +/- 12.65
ncm-et-13 12:37:35 1954920 4999 4281 10 708 +441.98 +/- 12.8
ncm-et-15 12:36:52 1959631 5001 4244 10 747 +432.26 +/- 12.46
20000 17047 37 2916 +437.06 +/- 6.3

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
152164 ncm-et-15 2021-10-09 22:25 00:01:10 1949660 1 1 0 0 +1129.65 +/- 376.02
152163 ncm-et-3 2021-10-09 22:25 00:01:19 1962627 5 5 0 0 +1199.83 +/- 231.31
152162 ncm-et-10 2021-10-09 21:10 01:15:49 1954509 495 422 1 72 +437.07 +/- 40.65
152161 ncm-et-13 2021-10-09 21:10 01:16:17 1947143 499 419 2 78 +419.23 +/- 39.03
152160 ncm-et-3 2021-10-09 21:07 01:16:25 1969394 500 415 1 84 +410.58 +/- 37.5
152159 ncm-et-15 2021-10-09 21:07 01:17:02 1956671 500 435 1 64 +460.32 +/- 43.24
152158 ncm-et-10 2021-10-09 19:53 01:16:08 1950243 500 419 1 80 +419.61 +/- 38.47
152157 ncm-et-13 2021-10-09 19:52 01:16:33 1954680 500 430 3 67 +441.5 +/- 42.25
152156 ncm-et-15 2021-10-09 19:50 01:15:55 1962522 500 428 2 70 +438.95 +/- 41.29
152155 ncm-et-3 2021-10-09 19:50 01:16:25 1959146 500 429 0 71 +446.7 +/- 40.89
152154 ncm-et-10 2021-10-09 18:36 01:16:21 1958334 500 440 1 59 +474.93 +/- 45.13
152153 ncm-et-15 2021-10-09 18:36 01:13:54 1962457 500 414 0 86 +410.58 +/- 36.97
152152 ncm-et-13 2021-10-09 18:35 01:17:07 1948880 500 441 0 59 +481.09 +/- 45.07
152151 ncm-et-3 2021-10-09 18:33 01:16:56 1959092 500 421 3 76 +419.61 +/- 39.58
152150 ncm-et-15 2021-10-09 17:20 01:15:37 1963870 500 427 0 73 +441.5 +/- 40.29
152149 ncm-et-10 2021-10-09 17:19 01:16:58 1955746 500 429 0 71 +446.7 +/- 40.89
152148 ncm-et-3 2021-10-09 17:18 01:14:11 1966774 500 436 1 63 +463.16 +/- 43.6
152147 ncm-et-13 2021-10-09 17:17 01:17:27 1928383 500 417 0 83 +417.31 +/- 37.67
152146 ncm-et-15 2021-10-09 16:04 01:14:53 1966482 500 413 1 86 +406.2 +/- 37.04
152145 ncm-et-3 2021-10-09 16:03 01:14:38 1962787 500 411 1 88 +401.92 +/- 36.6
152144 ncm-et-10 2021-10-09 16:02 01:16:22 1957406 500 433 0 67 +457.52 +/- 42.15
152143 ncm-et-13 2021-10-09 16:00 01:16:21 1951343 500 428 1 71 +441.5 +/- 40.95
152142 ncm-et-15 2021-10-09 14:47 01:16:02 1952679 500 429 3 68 +438.95 +/- 41.92
152141 ncm-et-3 2021-10-09 14:47 01:14:40 1967430 500 427 2 71 +436.43 +/- 40.99
152140 ncm-et-10 2021-10-09 14:44 01:16:57 1955414 500 419 2 79 +417.32 +/- 38.77
152139 ncm-et-13 2021-10-09 14:43 01:15:37 1960159 500 428 1 71 +441.5 +/- 40.95
152138 ncm-et-15 2021-10-09 13:32 01:15:07 1960630 500 426 2 72 +433.94 +/- 40.69
152137 ncm-et-3 2021-10-09 13:31 01:15:22 1967387 500 423 0 77 +431.48 +/- 39.18
152136 ncm-et-13 2021-10-09 13:29 01:13:56 1968160 500 439 0 61 +474.93 +/- 44.28
152135 ncm-et-10 2021-10-09 13:28 01:15:15 1962164 500 418 1 81 +417.32 +/- 38.22
152134 ncm-et-15 2021-10-09 12:15 01:16:34 1957708 500 422 0 78 +429.05 +/- 38.92
152133 ncm-et-3 2021-10-09 12:14 01:16:19 1957553 500 427 0 73 +441.5 +/- 40.29
152132 ncm-et-13 2021-10-09 12:14 01:13:55 1962926 500 420 0 80 +424.27 +/- 38.4
152131 ncm-et-10 2021-10-09 12:13 01:14:53 1960937 500 421 0 79 +426.65 +/- 38.66
152130 ncm-et-15 2021-10-09 10:59 01:14:25 1966476 500 429 0 71 +446.7 +/- 40.89
152129 ncm-et-13 2021-10-09 10:59 01:15:03 1961995 500 431 2 67 +446.7 +/- 42.25
152128 ncm-et-10 2021-10-09 10:58 01:14:10 1952098 500 430 0 70 +449.35 +/- 41.19
152127 ncm-et-3 2021-10-09 10:58 01:16:09 1951456 500 434 1 65 +457.52 +/- 42.89
152126 ncm-et-15 2021-10-09 09:43 01:16:13 1956787 500 420 1 79 +421.93 +/- 38.73
152125 ncm-et-3 2021-10-09 09:43 01:14:26 1968003 500 430 1 69 +446.7 +/- 41.57
152124 ncm-et-10 2021-10-09 09:43 01:14:42 1960467 500 433 1 66 +454.76 +/- 42.55
152123 ncm-et-13 2021-10-09 09:43 01:15:19 1965540 500 428 1 71 +441.5 +/- 40.95

Commit

Commit ID c8459b18ba2d6ddc76d6db90d6eab346ed682e69
Author Michael Chaly
Date 2021-10-09 07:59:33 UTC
Reduce more if multiple moves exceed alpha Idea of this patch is the following: in case we already have four moves that exceeded alpha in the current node, the probability of finding fifth should be reasonably low. Note that four is completely arbitrary - there could and probably should be some tweaks, both in tweaking best move count threshold for more reductions and tweaking how they work - for example making more reductions with best move count linearly. passed STC: https://tests.stockfishchess.org/tests/view/615f614783dd501a05b0aee2 LLR: 2.94 (-2.94,2.94) <-0.50,2.50> Total: 141816 W: 36056 L: 35686 D: 70074 Ptnml(0-2): 499, 15131, 39273, 15511, 494 passed LTC: https://tests.stockfishchess.org/tests/view/615fdff683dd501a05b0af35 LLR: 2.94 (-2.94,2.94) <0.50,3.50> Total: 68536 W: 17221 L: 16891 D: 34424 Ptnml(0-2): 38, 6573, 20725, 6885, 47 closes https://github.com/official-stockfish/Stockfish/pull/3736 Bench: 6131513
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