Dev Builds » 20220217-1945

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 11:25:59 1959684 3332 2816 6 510 +428.26 +/- 15.08
ncm-et-4 11:26:00 1959632 3329 2811 15 503 +424.15 +/- 15.21
ncm-et-9 11:26:03 1962269 3366 2816 7 543 +417.91 +/- 14.61
ncm-et-10 11:25:59 1953915 3288 2788 3 497 +432.73 +/- 15.27
ncm-et-13 11:25:59 1963706 3345 2859 8 478 +439.35 +/- 15.59
ncm-et-15 11:25:55 1960575 3340 2827 4 509 +430.52 +/- 15.09
20000 16917 43 3040 +428.69 +/- 6.17

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
157055 ncm-et-10 2022-02-19 05:25 01:00:08 1948304 288 247 1 40 +441.72 +/- 55.26
157054 ncm-et-4 2022-02-19 05:18 01:07:16 1964157 329 268 1 60 +393.14 +/- 44.57
157053 ncm-et-13 2022-02-19 05:15 01:10:17 1969859 345 290 1 54 +421.56 +/- 47.16
157052 ncm-et-3 2022-02-19 05:15 01:10:41 1956494 332 284 0 48 +443.33 +/- 50.08
157051 ncm-et-15 2022-02-19 05:14 01:11:03 1960479 340 290 0 50 +440.14 +/- 49.01
157050 ncm-et-9 2022-02-19 05:10 01:15:03 1962769 366 311 1 54 +432.7 +/- 47.18
157049 ncm-et-10 2022-02-19 03:39 01:44:59 1957247 500 428 0 72 +444.08 +/- 40.59
157048 ncm-et-4 2022-02-19 03:36 01:41:03 1968626 500 425 2 73 +431.48 +/- 40.4
157047 ncm-et-3 2022-02-19 03:32 01:41:28 1962768 500 426 2 72 +433.94 +/- 40.69
157046 ncm-et-13 2022-02-19 03:32 01:42:10 1968314 500 427 2 71 +436.43 +/- 40.99
157045 ncm-et-15 2022-02-19 03:32 01:42:00 1964625 500 428 1 71 +441.5 +/- 40.95
157044 ncm-et-9 2022-02-19 03:28 01:41:50 1958930 500 426 0 74 +438.95 +/- 40.01
157043 ncm-et-10 2022-02-19 01:55 01:43:30 1953766 500 432 0 68 +454.76 +/- 41.82
157042 ncm-et-4 2022-02-19 01:52 01:43:05 1953449 500 431 1 68 +449.35 +/- 41.89
157041 ncm-et-13 2022-02-19 01:48 01:42:56 1959237 500 439 0 61 +474.93 +/- 44.28
157040 ncm-et-3 2022-02-19 01:47 01:44:41 1956034 500 419 0 81 +421.93 +/- 38.15
157039 ncm-et-15 2022-02-19 01:46 01:44:45 1957453 500 414 1 85 +408.38 +/- 37.27
157038 ncm-et-9 2022-02-19 01:46 01:41:13 1962461 500 421 1 78 +424.28 +/- 38.99
157037 ncm-et-10 2022-02-19 00:10 01:44:26 1957257 500 422 0 78 +429.05 +/- 38.92
157036 ncm-et-4 2022-02-19 00:09 01:42:16 1971411 500 416 4 80 +406.2 +/- 38.54
157035 ncm-et-13 2022-02-19 00:06 01:42:11 1966459 500 421 0 79 +426.65 +/- 38.66
157034 ncm-et-15 2022-02-19 00:05 01:40:41 1960468 500 426 0 74 +438.95 +/- 40.01
157033 ncm-et-3 2022-02-19 00:05 01:41:42 1961382 500 428 1 71 +441.5 +/- 40.95
157032 ncm-et-9 2022-02-19 00:01 01:43:55 1957891 500 412 2 86 +401.92 +/- 37.09
157031 ncm-et-10 2022-02-18 22:25 01:44:08 1959244 500 424 0 76 +433.94 +/- 39.45
157030 ncm-et-4 2022-02-18 22:24 01:44:34 1957279 500 417 1 82 +415.05 +/- 37.98
157029 ncm-et-15 2022-02-18 22:24 01:40:45 1962457 500 428 1 71 +441.5 +/- 40.95
157028 ncm-et-3 2022-02-18 22:22 01:41:25 1965538 500 421 0 79 +426.65 +/- 38.66
157027 ncm-et-13 2022-02-18 22:21 01:44:21 1955155 500 426 0 74 +438.95 +/- 40.01
157026 ncm-et-9 2022-02-18 22:20 01:40:39 1963538 500 418 2 80 +415.05 +/- 38.52
157025 ncm-et-10 2022-02-18 20:40 01:45:02 1948143 500 430 0 70 +449.35 +/- 41.19
157024 ncm-et-3 2022-02-18 20:39 01:42:40 1960311 500 415 2 83 +408.38 +/- 37.78
157023 ncm-et-4 2022-02-18 20:39 01:44:30 1940039 500 426 5 69 +426.65 +/- 41.54
157022 ncm-et-15 2022-02-18 20:39 01:44:02 1951922 500 418 1 81 +417.32 +/- 38.22
157021 ncm-et-9 2022-02-18 20:38 01:41:23 1964919 500 421 1 78 +424.28 +/- 38.99
157020 ncm-et-13 2022-02-18 20:38 01:42:14 1961075 500 429 2 69 +441.5 +/- 41.61
157019 ncm-et-15 2022-02-18 18:56 01:42:39 1966621 500 423 0 77 +431.48 +/- 39.18
157018 ncm-et-10 2022-02-18 18:55 01:43:46 1953449 500 405 2 93 +387.57 +/- 35.6
157017 ncm-et-4 2022-02-18 18:55 01:43:16 1962468 500 428 1 71 +441.5 +/- 40.95
157016 ncm-et-13 2022-02-18 18:55 01:41:50 1965847 500 427 3 70 +433.94 +/- 41.3
157015 ncm-et-3 2022-02-18 18:55 01:43:22 1955262 500 423 1 76 +429.05 +/- 39.52
157014 ncm-et-9 2022-02-18 18:55 01:42:00 1965379 500 407 0 93 +395.65 +/- 35.48

Commit

Commit ID 84b1940fcae95bb0a641dda9e85cb96f8c21cd22
Author Michael Chaly
Date 2022-02-17 19:45:21 UTC
Tune search at very long time control This patch is a result of tuning done by user @candirufish after 150k games. Since the tuned values were really interesting and touched heuristics that are known for their non-linear scaling I decided to run limited games LTC match, even if the STC test was really bad (which was expected). After seeing the results of the LTC match, I also run a VLTC (very long time control) SPRTtest, which passed. The main difference is in extensions: this patch allows much more singular/double extensions, both in terms of allowing them at lower depths and with lesser margins. Failed STC: https://tests.stockfishchess.org/tests/view/620d66643ec80158c0cd3b46 LLR: -2.94 (-2.94,2.94) <0.00,2.50> Total: 4968 W: 1194 L: 1398 D: 2376 Ptnml(0-2): 47, 633, 1294, 497, 13 Performed well at LTC in a fixed-length match: https://tests.stockfishchess.org/tests/view/620d66823ec80158c0cd3b4a ELO: 3.36 +-1.8 (95%) LOS: 100.0% Total: 30000 W: 7966 L: 7676 D: 14358 Ptnml(0-2): 36, 2936, 8755, 3248, 25 Passed VLTC SPRT test: https://tests.stockfishchess.org/tests/view/620da11a26f5b17ec884f939 LLR: 2.96 (-2.94,2.94) <0.50,3.00> Total: 4400 W: 1326 L: 1127 D: 1947 Ptnml(0-2): 13, 309, 1348, 526, 4 closes https://github.com/official-stockfish/Stockfish/pull/3937 Bench: 6318903
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