Dev Builds » 20211205-1713

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 11:00:22 1961368 3354 2888 4 462 +449.18 +/- 15.85
ncm-et-4 11:00:27 1958187 3321 2892 7 422 +461.33 +/- 16.6
ncm-et-9 11:00:05 1962886 3342 2831 5 506 +431.0 +/- 15.14
ncm-et-10 11:00:25 1949875 3296 2829 6 461 +444.73 +/- 15.87
ncm-et-13 11:00:10 1959492 3334 2870 8 456 +447.27 +/- 15.97
ncm-et-15 11:00:21 1961790 3353 2864 7 482 +439.04 +/- 15.52
20000 17174 37 2789 +445.19 +/- 6.44

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
154544 ncm-et-10 2021-12-06 04:44 00:14:19 1947378 67 60 0 7 +503.43 +/- 157.74
154543 ncm-et-4 2021-12-06 04:40 00:18:09 1936862 85 70 0 15 +405.67 +/- 93.95
154542 ncm-et-13 2021-12-06 04:37 00:20:40 1962644 101 86 0 15 +438.28 +/- 94.45
154541 ncm-et-9 2021-12-06 04:37 00:21:00 1966319 103 80 0 23 +360.27 +/- 73.38
154540 ncm-et-15 2021-12-06 04:33 00:24:26 1960155 118 99 0 19 +423.06 +/- 82.33
154539 ncm-et-3 2021-12-06 04:33 00:25:16 1946855 121 103 0 18 +437.97 +/- 85.04
154538 ncm-et-10 2021-12-06 03:02 01:41:02 1954505 500 435 0 65 +463.15 +/- 42.83
154537 ncm-et-4 2021-12-06 02:56 01:43:22 1952678 500 450 0 50 +511.49 +/- 49.18
154536 ncm-et-13 2021-12-06 02:55 01:41:08 1956357 500 438 1 61 +468.96 +/- 44.35
154535 ncm-et-15 2021-12-06 02:54 01:39:12 1962003 500 431 0 69 +452.04 +/- 41.5
154534 ncm-et-9 2021-12-06 02:53 01:42:50 1957900 500 431 0 69 +452.04 +/- 41.5
154533 ncm-et-3 2021-12-06 02:51 01:41:18 1956639 500 426 1 73 +436.43 +/- 40.36
154532 ncm-et-10 2021-12-06 01:20 01:41:27 1946614 500 431 1 68 +449.35 +/- 41.89
154531 ncm-et-4 2021-12-06 01:14 01:40:48 1962018 500 432 1 67 +452.04 +/- 42.22
154530 ncm-et-13 2021-12-06 01:14 01:40:36 1957867 500 425 0 75 +436.43 +/- 39.73
154529 ncm-et-15 2021-12-06 01:11 01:41:39 1949666 500 438 1 61 +468.96 +/- 44.35
154528 ncm-et-9 2021-12-06 01:11 01:41:44 1955415 500 432 2 66 +449.35 +/- 42.58
154527 ncm-et-3 2021-12-06 01:10 01:39:50 1967855 500 430 0 70 +449.35 +/- 41.19
154526 ncm-et-10 2021-12-05 23:38 01:41:33 1948163 500 417 0 83 +417.31 +/- 37.67
154525 ncm-et-13 2021-12-05 23:33 01:40:40 1961845 500 425 1 74 +433.94 +/- 40.08
154524 ncm-et-4 2021-12-05 23:32 01:41:20 1953749 500 433 4 63 +446.7 +/- 43.57
154523 ncm-et-9 2021-12-05 23:30 01:40:18 1966155 500 432 2 66 +449.35 +/- 42.58
154522 ncm-et-3 2021-12-05 23:29 01:40:29 1956490 500 425 1 74 +433.94 +/- 40.08
154521 ncm-et-15 2021-12-05 23:29 01:41:41 1956946 500 414 2 84 +406.2 +/- 37.55
154520 ncm-et-10 2021-12-05 21:53 01:44:15 1940720 500 435 1 64 +460.32 +/- 43.24
154519 ncm-et-4 2021-12-05 21:53 01:39:02 1968620 500 427 0 73 +441.5 +/- 40.29
154518 ncm-et-13 2021-12-05 21:51 01:41:27 1960308 500 421 1 78 +424.28 +/- 38.99
154517 ncm-et-9 2021-12-05 21:50 01:39:41 1959568 500 427 1 72 +438.95 +/- 40.66
154516 ncm-et-3 2021-12-05 21:50 01:39:03 1968159 500 429 1 70 +444.09 +/- 41.26
154515 ncm-et-15 2021-12-05 21:48 01:40:13 1963381 500 434 1 65 +457.52 +/- 42.89
154514 ncm-et-4 2021-12-05 20:11 01:40:38 1963701 500 445 1 54 +490.71 +/- 47.28
154513 ncm-et-10 2021-12-05 20:11 01:41:06 1948324 500 424 0 76 +433.94 +/- 39.45
154512 ncm-et-9 2021-12-05 20:10 01:38:44 1965403 500 411 0 89 +404.05 +/- 36.31
154511 ncm-et-3 2021-12-05 20:09 01:39:28 1961548 500 439 0 61 +474.93 +/- 44.28
154510 ncm-et-13 2021-12-05 20:09 01:41:35 1948301 500 431 1 68 +449.35 +/- 41.89
154509 ncm-et-15 2021-12-05 20:08 01:39:46 1968319 500 412 1 87 +404.05 +/- 36.82
154508 ncm-et-9 2021-12-05 18:29 01:40:35 1966155 500 410 0 90 +401.92 +/- 36.1
154507 ncm-et-4 2021-12-05 18:29 01:41:45 1962793 500 437 1 62 +466.04 +/- 43.97
154506 ncm-et-3 2021-12-05 18:29 01:39:49 1964919 500 432 1 67 +452.04 +/- 42.22
154505 ncm-et-15 2021-12-05 18:29 01:38:11 1967393 500 432 1 67 +452.04 +/- 42.22
154504 ncm-et-13 2021-12-05 18:29 01:39:10 1963693 500 440 3 57 +468.96 +/- 45.93
154503 ncm-et-10 2021-12-05 18:29 01:41:37 1953739 500 433 2 65 +452.04 +/- 42.92
154502 ncm-et-13 2021-12-05 17:53 00:34:54 1964924 233 204 1 28 +464.95 +/- 66.95
154501 ncm-et-9 2021-12-05 17:53 00:35:13 1966178 239 208 0 31 +463.57 +/- 63.2
154500 ncm-et-3 2021-12-05 17:53 00:35:09 1968479 233 204 0 29 +471.22 +/- 65.55
154499 ncm-et-4 2021-12-05 17:53 00:35:23 1965075 236 198 0 38 +423.07 +/- 56.53
154498 ncm-et-10 2021-12-05 17:53 00:35:06 1959561 229 194 2 33 +422.43 +/- 61.14
154497 ncm-et-15 2021-12-05 17:53 00:35:13 1966459 235 204 1 30 +454.53 +/- 64.47

Commit

Commit ID 7d44b43b3ceb2eebc756709432a0e291f885a1d2
Author Stefan Geschwentner
Date 2021-12-05 17:13:49 UTC
Tweak history initialization Initialize continuation history with a slighlty negative value -71 instead of zero. The idea is, because the most history entries will be later negative anyway, to shift the starting values a little bit in the "correct" direction. Of course the effect of initialization dimishes with greater depth so I had the apprehension that the LTC test would be difficult to pass, but it passed. STC: LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 34520 W: 9076 L: 8803 D: 16641 Ptnml(0-2): 136, 3837, 9047, 4098, 142 https://tests.stockfishchess.org/tests/view/61aa52e39e8855bba1a3776b LTC: LLR: 2.93 (-2.94,2.94) <0.50,3.00> Total: 75568 W: 19620 L: 19254 D: 36694 Ptnml(0-2): 44, 7773, 21796, 8115, 56 https://tests.stockfishchess.org/tests/view/61aa87d39e8855bba1a383a5 closes https://github.com/official-stockfish/Stockfish/pull/3834 Bench: 4674029
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