Dev Builds » 20220328-2037

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 11:26:06 1962714 3375 2866 11 498 +431.39 +/- 15.28
ncm-et-4 11:26:08 1939771 3312 2864 5 443 +453.7 +/- 16.19
ncm-et-9 11:26:25 1961577 3365 2843 8 514 +427.25 +/- 15.03
ncm-et-10 10:56:25 1958084 3174 2716 7 451 +440.86 +/- 16.05
ncm-et-13 11:25:49 1959738 3382 2904 3 475 +446.41 +/- 15.62
ncm-et-15 11:26:13 1963895 3392 2901 6 485 +440.83 +/- 15.47
20000 17094 40 2866 +439.84 +/- 6.35

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
157703 ncm-et-10 2022-03-29 22:39 00:33:12 1952994 159 127 1 31 +374.53 +/- 63.01
157701 ncm-et-10 2022-03-29 22:30 00:01:04 1961381 1 0 0 1 0.0 +/- 30.47
157700 ncm-et-10 2022-03-29 22:25 00:00:17 1968214 1 0 0 1 0.0 +/- 30.47
157699 ncm-et-10 2022-03-29 22:21 00:01:03 1950010 2 1 0 1 +190.5 +/- 634.21
157698 ncm-et-10 2022-03-29 22:16 00:01:38 1953600 5 5 0 0 +1199.83 +/- 231.31
157697 ncm-et-4 2022-03-29 22:08 01:04:18 1956176 312 271 0 41 +461.15 +/- 54.46
157696 ncm-et-9 2022-03-29 21:58 01:14:35 1969400 365 307 3 55 +416.04 +/- 46.76
157695 ncm-et-3 2022-03-29 21:56 01:15:27 1962461 375 324 2 49 +447.58 +/- 49.7
157694 ncm-et-13 2022-03-29 21:55 01:17:18 1962776 382 332 1 49 +458.21 +/- 49.7
157693 ncm-et-15 2022-03-29 21:51 01:20:49 1957859 392 339 3 50 +445.58 +/- 49.14
157692 ncm-et-10 2022-03-29 20:33 01:42:06 1959857 500 426 1 73 +436.43 +/- 40.36
157691 ncm-et-10 2022-03-29 20:28 00:01:12 1978101 5 5 0 0 +1199.83 +/- 231.31
157690 ncm-et-4 2022-03-29 20:25 01:42:08 1959874 500 425 2 73 +431.48 +/- 40.4
157689 ncm-et-3 2022-03-29 20:16 01:39:51 1960474 500 419 2 79 +417.32 +/- 38.77
157688 ncm-et-9 2022-03-29 20:13 01:43:51 1953928 500 426 1 73 +436.43 +/- 40.36
157687 ncm-et-13 2022-03-29 20:13 01:41:13 1952863 500 431 1 68 +449.35 +/- 41.89
157686 ncm-et-15 2022-03-29 20:09 01:41:53 1962919 500 414 0 86 +410.58 +/- 36.97
157685 ncm-et-10 2022-03-29 18:41 01:43:15 1955121 499 439 1 59 +474.56 +/- 45.13
157684 ncm-et-4 2022-03-29 18:40 01:44:08 1946306 500 434 0 66 +460.32 +/- 42.48
157683 ncm-et-10 2022-03-29 18:36 00:01:17 1950545 2 2 0 0 +1199.83 +/- 312.71
157682 ncm-et-3 2022-03-29 18:34 01:41:07 1962918 500 418 1 81 +417.32 +/- 38.22
157681 ncm-et-9 2022-03-29 18:32 01:40:28 1964152 500 414 3 83 +404.05 +/- 37.81
157680 ncm-et-13 2022-03-29 18:31 01:41:13 1964455 500 421 0 79 +426.65 +/- 38.66
157679 ncm-et-15 2022-03-29 18:27 01:41:26 1960625 500 429 1 70 +444.09 +/- 41.26
157678 ncm-et-10 2022-03-29 16:53 01:43:06 1951010 500 432 1 67 +452.04 +/- 42.22
157677 ncm-et-4 2022-03-29 16:51 01:48:05 1856462 500 426 1 73 +436.43 +/- 40.36
157676 ncm-et-3 2022-03-29 16:50 01:44:01 1956204 500 421 3 76 +419.61 +/- 39.58
157675 ncm-et-13 2022-03-29 16:49 01:41:02 1958929 500 437 0 63 +468.95 +/- 43.54
157674 ncm-et-9 2022-03-29 16:49 01:42:37 1962153 500 429 1 70 +444.09 +/- 41.26
157673 ncm-et-15 2022-03-29 16:44 01:41:36 1963388 500 423 0 77 +431.48 +/- 39.18
157672 ncm-et-4 2022-03-29 15:09 01:41:41 1961230 500 432 1 67 +452.04 +/- 42.22
157671 ncm-et-10 2022-03-29 15:08 01:43:34 1957716 500 421 1 78 +424.28 +/- 38.99
157670 ncm-et-3 2022-03-29 15:07 01:41:29 1969085 500 438 0 62 +471.92 +/- 43.9
157669 ncm-et-13 2022-03-29 15:07 01:41:03 1964148 500 433 0 67 +457.52 +/- 42.15
157668 ncm-et-9 2022-03-29 15:07 01:40:51 1960001 500 415 0 85 +412.8 +/- 37.2
157667 ncm-et-15 2022-03-29 15:05 01:39:04 1970327 500 437 1 62 +466.04 +/- 43.97
157666 ncm-et-10 2022-03-29 13:27 01:40:14 1965240 500 441 1 58 +477.99 +/- 45.54
157665 ncm-et-4 2022-03-29 13:26 01:42:18 1960021 500 441 1 58 +477.99 +/- 45.54
157664 ncm-et-15 2022-03-29 13:24 01:39:57 1965074 500 423 0 77 +431.48 +/- 39.18
157663 ncm-et-9 2022-03-29 13:24 01:42:36 1959096 500 429 0 71 +446.7 +/- 40.89
157662 ncm-et-3 2022-03-29 13:24 01:42:56 1962151 500 428 0 72 +444.08 +/- 40.59
157661 ncm-et-13 2022-03-29 13:24 01:43:14 1947766 500 419 1 80 +419.61 +/- 38.47
157660 ncm-et-10 2022-03-29 11:42 01:44:27 1951306 500 417 1 82 +415.05 +/- 37.98
157659 ncm-et-13 2022-03-29 11:42 01:40:46 1967231 500 431 0 69 +452.04 +/- 41.5
157658 ncm-et-15 2022-03-29 11:42 01:41:28 1967076 500 436 1 63 +463.16 +/- 43.6
157657 ncm-et-3 2022-03-29 11:42 01:41:15 1965705 500 418 3 79 +412.8 +/- 38.79
157656 ncm-et-9 2022-03-29 11:42 01:41:27 1962309 500 423 0 77 +431.48 +/- 39.18
157655 ncm-et-4 2022-03-29 11:42 01:43:30 1938329 500 435 0 65 +463.15 +/- 42.83

Commit

Commit ID 08e0f52b77edb929989c68c49e954b9bc5d7d67e
Author Michael Chaly
Date 2022-03-28 20:37:09 UTC
In movepicker increase priority for moves that evade a capture This idea is a mix of koivisto idea of threat history and heuristic that was simplified some time ago in LMR - decreasing reduction for moves that evade a capture. Instead of doing so in LMR this patch does it in movepicker - to do this it calculates squares that are attacked by different piece types and pieces that are located on this squares and boosts up weight of moves that make this pieces land on a square that is not under threat. Boost is greater for pieces with bigger material values. Special thanks to koivisto and seer authors for explaining me ideas behind threat history. Passed STC: https://tests.stockfishchess.org/tests/view/62406e473b32264b9aa1478b LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 19816 W: 5320 L: 5072 D: 9424 Ptnml(0-2): 86, 2165, 5172, 2385, 100 Passed LTC: https://tests.stockfishchess.org/tests/view/62407f2e3b32264b9aa149c8 LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 51200 W: 13805 L: 13500 D: 23895 Ptnml(0-2): 44, 5023, 15164, 5322, 47 closes https://github.com/official-stockfish/Stockfish/pull/3970 bench 7736491
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