Dev Builds » 20200928-2022

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 08:35:05 1963844 3351 2627 23 701 +360.62 +/- 12.86
ncm-et-4 08:35:09 1951593 3324 2588 20 716 +356.7 +/- 12.71
ncm-et-9 08:35:18 1968880 3336 2619 23 694 +361.59 +/- 12.92
ncm-et-10 08:35:17 1961402 3298 2597 30 671 +361.74 +/- 13.15
ncm-et-13 08:34:59 1957238 3344 2608 26 710 +356.32 +/- 12.78
ncm-et-15 08:35:17 1968150 3347 2591 30 726 +350.41 +/- 12.64
20000 15630 152 4218 +357.85 +/- 5.24

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
139539 ncm-et-10 2020-10-01 07:46 00:44:25 1963692 298 232 2 64 +356.05 +/- 43.08 ↓
139538 ncm-et-4 2020-10-01 07:41 00:49:38 1967706 324 249 2 73 +348.06 +/- 40.22 ↓
139537 ncm-et-9 2020-10-01 07:39 00:51:26 1965702 336 266 0 70 +373.79 +/- 40.96 ↓
139536 ncm-et-13 2020-10-01 07:39 00:52:03 1961536 344 274 2 68 +372.9 +/- 41.8 ↓
139535 ncm-et-15 2020-10-01 07:38 00:53:01 1969244 347 278 3 66 +374.58 +/- 42.5 ↓
139534 ncm-et-3 2020-10-01 07:36 00:54:33 1965537 351 270 2 79 +349.05 +/- 38.62 ↓
139533 ncm-et-10 2020-10-01 06:28 01:17:24 1969088 500 383 6 111 +341.24 +/- 32.56 ↓
139532 ncm-et-4 2020-10-01 06:24 01:15:56 1967386 500 404 2 94 +385.59 +/- 35.4 ↓
139531 ncm-et-13 2020-10-01 06:21 01:16:41 1964923 500 385 8 107 +341.24 +/- 33.19 ↓
139530 ncm-et-9 2020-10-01 06:20 01:18:44 1976693 500 404 5 91 +379.78 +/- 36.07 ↓
139529 ncm-et-15 2020-10-01 06:19 01:17:57 1966328 500 395 4 101 +364.98 +/- 34.16 ↓
139528 ncm-et-3 2020-10-01 06:18 01:17:06 1964923 500 392 2 106 +363.2 +/- 33.24 ↓
139527 ncm-et-10 2020-10-01 05:07 01:20:21 1958947 500 402 2 96 +381.7 +/- 35.02 ↓
139526 ncm-et-4 2020-10-01 05:05 01:18:13 1925915 500 377 3 120 +336.46 +/- 31.18 ↓
139525 ncm-et-9 2020-10-01 05:02 01:16:51 1972495 500 394 3 103 +364.98 +/- 33.79 ↓
139524 ncm-et-3 2020-10-01 05:01 01:15:43 1962764 500 395 4 101 +364.98 +/- 34.16 ↓
139523 ncm-et-15 2020-10-01 05:01 01:17:01 1972507 500 388 3 109 +354.5 +/- 32.8 ↓
139522 ncm-et-13 2020-10-01 05:00 01:20:04 1923299 500 381 2 117 +344.48 +/- 31.55 ↓
139521 ncm-et-10 2020-10-01 03:47 01:18:51 1957859 500 382 6 112 +339.63 +/- 32.41 ↓
139520 ncm-et-4 2020-10-01 03:46 01:18:07 1929384 500 374 3 123 +331.77 +/- 30.77 ↓
139519 ncm-et-9 2020-10-01 03:44 01:16:08 1964629 500 383 1 116 +349.43 +/- 31.64 ↓
139518 ncm-et-3 2020-10-01 03:43 01:16:42 1962611 500 385 6 109 +344.48 +/- 32.87 ↓
139517 ncm-et-13 2020-10-01 03:43 01:15:23 1959237 500 390 4 106 +356.21 +/- 33.31 ↓
139516 ncm-et-15 2020-10-01 03:43 01:16:55 1966929 500 376 5 119 +331.77 +/- 31.38 ↓
139515 ncm-et-9 2020-10-01 02:27 01:16:10 1970336 500 391 3 106 +359.68 +/- 33.28 ↓
139514 ncm-et-10 2020-10-01 02:27 01:18:48 1955110 500 408 3 89 +391.57 +/- 36.46 ↓
139513 ncm-et-4 2020-10-01 02:27 01:17:52 1968004 500 397 4 99 +368.59 +/- 34.52 ↓
139512 ncm-et-3 2020-10-01 02:26 01:16:10 1961232 500 395 6 99 +361.43 +/- 34.54 ↓
139511 ncm-et-13 2020-10-01 02:26 01:16:31 1962149 500 395 2 103 +368.59 +/- 33.75 ↓
139510 ncm-et-15 2020-10-01 02:25 01:17:06 1965384 500 379 6 115 +334.88 +/- 31.97 ↓
139509 ncm-et-9 2020-10-01 01:09 01:16:55 1965536 500 380 5 115 +338.04 +/- 31.95 ↓
139508 ncm-et-3 2020-10-01 01:08 01:16:42 1962921 500 377 1 122 +339.63 +/- 30.81 ↓
139507 ncm-et-10 2020-10-01 01:07 01:18:35 1958936 500 385 8 107 +341.24 +/- 33.19 ↓
139506 ncm-et-4 2020-10-01 01:07 01:18:35 1935986 500 392 2 106 +363.2 +/- 33.24 ↓
139505 ncm-et-13 2020-10-01 01:07 01:17:57 1965225 500 389 3 108 +356.21 +/- 32.96 ↓
139504 ncm-et-15 2020-10-01 01:06 01:17:07 1971124 500 394 6 100 +359.68 +/- 34.36 ↓
139503 ncm-et-3 2020-09-30 23:49 01:18:09 1966922 500 413 2 85 +404.05 +/- 37.32 ↓
139502 ncm-et-13 2020-09-30 23:49 01:16:20 1964301 500 394 5 101 +361.43 +/- 34.18 ↓
139501 ncm-et-15 2020-09-30 23:49 01:16:10 1965534 500 381 3 116 +342.85 +/- 31.74 ↓
139500 ncm-et-9 2020-09-30 23:49 01:19:04 1966769 500 401 6 93 +372.25 +/- 35.66 ↓
139499 ncm-et-10 2020-09-30 23:49 01:16:53 1966185 500 405 3 92 +385.59 +/- 35.84 ↓
139498 ncm-et-4 2020-09-30 23:49 01:16:48 1966776 500 395 4 101 +364.98 +/- 34.16 ↓

Commit

Commit ID a5e68d9b25539b86304a9fb26afc616dc8126a1c
Author Vizvezdenec
Date 2020-09-28 20:22:54 UTC
Adjust null move pruning constants Idea is that division by fraction of 2 is slightly faster than by other numbers so parameters are adjusted in a way that division in null move pruning depth reduction features dividing by 256 instead of dividing by 213. Other than this patch is almost non-functional - difference starts to exist by depth 133. passed STC https://tests.stockfishchess.org/tests/view/5f70dd943b22d6afa50693c5 LLR: 2.95 (-2.94,2.94) {-0.25,1.25} Total: 57048 W: 6616 L: 6392 D: 44040 Ptnml(0-2): 304, 4583, 18531, 4797, 309 passed LTC https://tests.stockfishchess.org/tests/view/5f7180db3b22d6afa506941f LLR: 2.95 (-2.94,2.94) {0.25,1.25} Total: 45960 W: 2419 L: 2229 D: 41312 Ptnml(0-2): 43, 1779, 19137, 1987, 34 closes https://github.com/official-stockfish/Stockfish/pull/3159 bench 3789924
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