Dev Builds » 20210805-0647

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 08:17:34 1956084 3319 2809 5 505 +430.06 +/- 15.15
ncm-et-4 08:17:14 1957500 3330 2816 9 505 +427.78 +/- 15.16
ncm-et-9 08:17:46 1961648 3351 2820 9 522 +422.93 +/- 14.91
ncm-et-10 08:17:34 1957754 3322 2769 8 545 +414.06 +/- 14.58
ncm-et-13 08:17:41 1960567 3349 2800 7 542 +417.29 +/- 14.62
ncm-et-15 08:17:25 1955533 3329 2809 7 513 +426.29 +/- 15.04
20000 16823 45 3132 +422.99 +/- 6.08

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
150686 ncm-et-10 2021-08-09 20:32 00:48:29 1956067 322 262 1 59 +392.14 +/- 44.96
150685 ncm-et-3 2021-08-09 20:32 00:48:36 1957251 319 277 2 40 +452.13 +/- 55.28
150684 ncm-et-15 2021-08-09 20:31 00:49:29 1950854 329 275 2 52 +412.56 +/- 48.14
150683 ncm-et-4 2021-08-09 20:31 00:49:52 1954310 330 273 1 56 +406.47 +/- 46.23
150682 ncm-et-13 2021-08-09 20:29 00:51:40 1959714 349 286 1 62 +398.36 +/- 43.83
150681 ncm-et-9 2021-08-09 20:27 00:53:59 1953744 351 296 2 53 +421.47 +/- 47.68
150680 ncm-et-3 2021-08-09 19:18 01:13:38 1960619 500 414 1 85 +408.38 +/- 37.27
150679 ncm-et-10 2021-08-09 19:16 01:15:52 1955111 500 413 1 86 +406.2 +/- 37.04
150678 ncm-et-4 2021-08-09 19:16 01:14:26 1957857 500 432 2 66 +449.35 +/- 42.58
150677 ncm-et-15 2021-08-09 19:15 01:15:23 1943811 500 434 0 66 +460.32 +/- 42.48
150676 ncm-et-13 2021-08-09 19:15 01:13:38 1964615 500 423 1 76 +429.05 +/- 39.52
150675 ncm-et-9 2021-08-09 19:11 01:15:34 1956026 500 411 1 88 +401.92 +/- 36.6
150674 ncm-et-3 2021-08-09 18:02 01:15:15 1950562 500 419 0 81 +421.93 +/- 38.15
150673 ncm-et-4 2021-08-09 18:01 01:14:42 1948719 500 423 0 77 +431.48 +/- 39.18
150672 ncm-et-10 2021-08-09 18:00 01:14:57 1958784 500 423 0 77 +431.48 +/- 39.18
150671 ncm-et-13 2021-08-09 18:00 01:14:08 1959703 500 425 1 74 +433.94 +/- 40.08
150670 ncm-et-15 2021-08-09 17:59 01:15:27 1959084 500 426 0 74 +438.95 +/- 40.01
150669 ncm-et-9 2021-08-09 17:56 01:13:48 1972650 500 431 0 69 +452.04 +/- 41.5
150668 ncm-et-3 2021-08-09 16:46 01:15:39 1956489 500 427 0 73 +441.5 +/- 40.29
150667 ncm-et-13 2021-08-09 16:46 01:14:08 1954526 500 416 2 82 +410.58 +/- 38.02
150666 ncm-et-4 2021-08-09 16:45 01:15:13 1956972 500 431 1 68 +449.35 +/- 41.89
150665 ncm-et-10 2021-08-09 16:45 01:15:03 1947105 500 422 2 76 +424.28 +/- 39.56
150664 ncm-et-15 2021-08-09 16:44 01:15:05 1957255 500 402 0 98 +385.59 +/- 34.52
150663 ncm-et-9 2021-08-09 16:42 01:13:30 1960355 500 420 2 78 +419.61 +/- 39.03
150662 ncm-et-3 2021-08-09 15:31 01:14:20 1951913 500 412 2 86 +401.92 +/- 37.09
150661 ncm-et-13 2021-08-09 15:30 01:14:31 1961848 500 425 1 74 +433.94 +/- 40.08
150660 ncm-et-10 2021-08-09 15:30 01:13:48 1960966 500 408 1 91 +395.65 +/- 35.96
150659 ncm-et-15 2021-08-09 15:30 01:13:21 1962304 500 424 3 73 +426.65 +/- 40.41
150658 ncm-et-4 2021-08-09 15:29 01:14:59 1962472 500 417 0 83 +417.31 +/- 37.67
150657 ncm-et-9 2021-08-09 15:28 01:13:34 1961076 500 422 1 77 +426.65 +/- 39.25
150656 ncm-et-15 2021-08-09 14:16 01:13:17 1959252 500 427 1 72 +438.95 +/- 40.66
150655 ncm-et-4 2021-08-09 14:15 01:13:22 1963544 500 432 3 65 +446.7 +/- 42.92
150654 ncm-et-10 2021-08-09 14:15 01:14:59 1953443 500 416 1 83 +412.8 +/- 37.74
150653 ncm-et-3 2021-08-09 14:14 01:16:27 1952527 500 442 0 58 +484.24 +/- 45.47
150652 ncm-et-13 2021-08-09 14:14 01:16:04 1957571 500 419 1 80 +419.61 +/- 38.47
150651 ncm-et-9 2021-08-09 14:13 01:14:01 1962152 500 415 0 85 +412.8 +/- 37.2
150650 ncm-et-4 2021-08-09 13:00 01:14:40 1958627 500 408 2 90 +393.6 +/- 36.22
150649 ncm-et-15 2021-08-09 13:00 01:15:23 1956177 500 421 1 78 +424.28 +/- 38.99
150648 ncm-et-3 2021-08-09 13:00 01:13:39 1963229 500 418 0 82 +419.61 +/- 37.91
150647 ncm-et-10 2021-08-09 13:00 01:14:26 1972804 500 425 2 73 +431.48 +/- 40.4
150646 ncm-et-13 2021-08-09 13:00 01:13:32 1965997 500 406 0 94 +393.6 +/- 35.29
150645 ncm-et-9 2021-08-09 13:00 01:13:20 1965535 500 425 3 72 +429.05 +/- 40.7

Commit

Commit ID 5cd42f6b0b30b7b3332367230aeef2efc93e5aad
Author Stefan Geschwentner
Date 2021-08-05 06:47:33 UTC
Simplify new cmh pruning thresholds by using directly a quadratic formula. This decouples also the stat bonus updates from the threshold which creates less dependencies for tuning of stat bonus parameters. Perhaps a further fine tuning of the now separated coefficients for constHist[0] and constHist[1] could give further gains. STC: LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 78384 W: 6134 L: 6090 D: 66160 Ptnml(0-2): 207, 5013, 28705, 5063, 204 https://tests.stockfishchess.org/tests/view/6106d235afad2da4f4ae3d4b LTC: LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 38176 W: 1149 L: 1095 D: 35932 Ptnml(0-2): 6, 1000, 17030, 1038, 14 https://tests.stockfishchess.org/tests/view/6107a080afad2da4f4ae3def closes https://github.com/official-stockfish/Stockfish/pull/3639 Bench: 5098146
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