Dev Builds » 20220205-0640

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 11:19:36 1958267 3325 2878 4 443 +455.26 +/- 16.19
ncm-et-4 11:19:54 1963149 3340 2892 7 441 +454.45 +/- 16.24
ncm-et-9 11:19:51 1964715 3352 2913 2 437 +460.94 +/- 16.3
ncm-et-10 11:19:53 1958501 3321 2870 6 445 +452.57 +/- 16.16
ncm-et-13 11:20:25 1962385 3354 2926 5 423 +464.45 +/- 16.58
ncm-et-15 11:20:11 1958863 3308 2881 6 421 +461.88 +/- 16.62
20000 17360 30 2610 +458.22 +/- 6.66

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
156719 ncm-et-15 2022-02-06 21:54 01:04:00 1958930 308 266 0 42 +454.26 +/- 53.75
156718 ncm-et-3 2022-02-06 21:52 01:05:55 1961999 325 279 0 46 +447.3 +/- 51.22
156717 ncm-et-10 2022-02-06 21:51 01:06:42 1954197 321 276 1 44 +445.0 +/- 52.56
156716 ncm-et-4 2022-02-06 21:49 01:08:36 1966310 340 298 0 42 +472.62 +/- 53.81
156715 ncm-et-9 2022-02-06 21:47 01:10:53 1968002 352 311 0 41 +483.48 +/- 54.52
156714 ncm-et-13 2022-02-06 21:46 01:12:19 1961688 354 312 0 42 +480.08 +/- 53.83
156713 ncm-et-3 2022-02-06 20:11 01:40:11 1959242 500 425 0 75 +436.43 +/- 39.73
156712 ncm-et-15 2022-02-06 20:10 01:43:19 1951054 500 437 0 63 +468.95 +/- 43.54
156711 ncm-et-10 2022-02-06 20:08 01:42:03 1962928 500 442 0 58 +484.24 +/- 45.47
156710 ncm-et-4 2022-02-06 20:06 01:42:05 1968627 500 439 1 60 +471.92 +/- 44.73
156709 ncm-et-13 2022-02-06 20:04 01:41:46 1952825 500 436 0 64 +466.03 +/- 43.18
156708 ncm-et-9 2022-02-06 20:02 01:44:13 1956330 500 437 0 63 +468.95 +/- 43.54
156707 ncm-et-3 2022-02-06 18:28 01:41:54 1958807 500 430 0 70 +449.35 +/- 41.19
156706 ncm-et-15 2022-02-06 18:28 01:41:22 1961076 500 432 0 68 +454.76 +/- 41.82
156705 ncm-et-10 2022-02-06 18:27 01:40:26 1965302 500 425 1 74 +433.94 +/- 40.08
156704 ncm-et-4 2022-02-06 18:24 01:41:58 1959388 500 438 0 62 +471.92 +/- 43.9
156703 ncm-et-13 2022-02-06 18:21 01:41:30 1964148 500 436 0 64 +466.03 +/- 43.18
156702 ncm-et-9 2022-02-06 18:21 01:40:51 1967694 500 429 0 71 +446.7 +/- 40.89
156701 ncm-et-10 2022-02-06 16:46 01:40:46 1965691 500 434 0 66 +460.32 +/- 42.48
156700 ncm-et-3 2022-02-06 16:46 01:41:48 1955416 500 439 0 61 +474.93 +/- 44.28
156699 ncm-et-15 2022-02-06 16:43 01:44:10 1957715 500 433 2 65 +452.04 +/- 42.92
156698 ncm-et-4 2022-02-06 16:42 01:41:24 1962921 500 435 1 64 +460.32 +/- 43.24
156697 ncm-et-9 2022-02-06 16:39 01:40:22 1963085 500 429 0 71 +446.7 +/- 40.89
156696 ncm-et-13 2022-02-06 16:39 01:41:35 1967554 500 433 0 67 +457.52 +/- 42.15
156695 ncm-et-10 2022-02-06 15:02 01:43:08 1955429 500 433 1 66 +454.76 +/- 42.55
156694 ncm-et-3 2022-02-06 15:01 01:44:16 1950395 500 429 2 69 +441.5 +/- 41.61
156693 ncm-et-15 2022-02-06 15:00 01:42:24 1961697 500 440 1 59 +474.93 +/- 45.13
156692 ncm-et-4 2022-02-06 14:59 01:41:49 1965848 500 429 2 69 +441.5 +/- 41.61
156691 ncm-et-13 2022-02-06 14:57 01:41:18 1966176 500 437 1 62 +466.04 +/- 43.97
156690 ncm-et-9 2022-02-06 14:57 01:41:41 1965702 500 430 1 69 +446.7 +/- 41.57
156689 ncm-et-15 2022-02-06 13:19 01:40:31 1965385 500 435 1 64 +460.32 +/- 43.24
156688 ncm-et-10 2022-02-06 13:18 01:43:43 1953587 500 425 2 73 +431.48 +/- 40.4
156687 ncm-et-3 2022-02-06 13:18 01:42:30 1964767 500 441 2 57 +474.93 +/- 45.97
156686 ncm-et-13 2022-02-06 13:16 01:40:33 1960461 500 438 4 58 +460.32 +/- 45.46
156685 ncm-et-4 2022-02-06 13:16 01:43:01 1955567 500 428 1 71 +441.5 +/- 40.95
156684 ncm-et-9 2022-02-06 13:15 01:41:07 1961545 500 439 0 61 +474.93 +/- 44.28
156683 ncm-et-9 2022-02-06 11:34 01:40:44 1970649 500 438 1 61 +468.96 +/- 44.35
156682 ncm-et-13 2022-02-06 11:34 01:41:24 1963843 500 434 0 66 +460.32 +/- 42.48
156681 ncm-et-15 2022-02-06 11:34 01:44:25 1956187 500 438 2 60 +466.04 +/- 44.75
156680 ncm-et-3 2022-02-06 11:34 01:43:02 1957247 500 435 0 65 +463.15 +/- 42.83
156679 ncm-et-4 2022-02-06 11:34 01:41:01 1963382 500 425 2 73 +431.48 +/- 40.4
156678 ncm-et-10 2022-02-06 11:34 01:43:05 1952375 500 435 1 64 +460.32 +/- 43.24

Commit

Commit ID 4d3950c6eb80c932af00f6495668d5c5adf3701b
Author Michael Chaly
Date 2022-02-05 06:40:21 UTC
Reintroduce razoring Razoring was simplified away some years ago, this patch reintroduces it in a slightly different form. Now for low depths if eval is far below alpha we check if qsearch can push it above alpha - and if it can't we return a fail low. passed STC https://tests.stockfishchess.org/tests/view/61fbf968d508ec6a1c9f3274 LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 226120 W: 61106 L: 60472 D: 104542 Ptnml(0-2): 1118, 25592, 59080, 26078, 1192 passed LTC https://tests.stockfishchess.org/tests/view/61fcc569d508ec6a1c9f5617 LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 113128 W: 30851 L: 30397 D: 51880 Ptnml(0-2): 114, 11483, 32926, 11917, 124 closes https://github.com/official-stockfish/Stockfish/pull/3921 bench 4684080
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