Dev Builds » 20210130-1220

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 08:19:05 1971071 3362 2679 22 661 +372.53 +/- 13.25
ncm-et-4 08:18:32 1963327 3328 2668 14 646 +379.27 +/- 13.39
ncm-et-9 08:18:56 1970908 3368 2640 17 711 +362.14 +/- 12.75
ncm-et-10 08:18:59 1960203 3308 2673 15 620 +385.11 +/- 13.67
ncm-et-13 08:18:45 1954224 3306 2625 20 661 +370.38 +/- 13.24
ncm-et-15 08:18:39 1971484 3328 2642 12 674 +372.5 +/- 13.09
20000 15927 100 3973 +373.5 +/- 5.39

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
142614 ncm-et-10 2021-01-31 12:23 00:46:05 1963553 308 246 3 59 +371.3 +/- 45.03 ↓
142613 ncm-et-13 2021-01-31 12:23 00:46:21 1957863 306 230 2 74 +334.18 +/- 39.89 ↓
142612 ncm-et-4 2021-01-31 12:21 00:48:24 1969704 328 264 0 64 +386.45 +/- 42.94 ↓
142611 ncm-et-15 2021-01-31 12:20 00:48:40 1976538 328 259 1 68 +369.12 +/- 41.7 ↓
142610 ncm-et-9 2021-01-31 12:16 00:53:39 1973580 368 290 2 76 +365.53 +/- 39.45 ↓
142609 ncm-et-3 2021-01-31 12:15 00:54:14 1964456 362 291 1 70 +382.77 +/- 41.12 ↓
142608 ncm-et-10 2021-01-31 11:07 01:14:57 1962615 500 400 1 99 +379.78 +/- 34.4 ↓
142607 ncm-et-13 2021-01-31 11:07 01:15:10 1961230 500 387 5 108 +349.43 +/- 33.01 ↓
142606 ncm-et-15 2021-01-31 11:05 01:14:05 1975759 500 399 2 99 +375.98 +/- 34.46 ↓
142605 ncm-et-4 2021-01-31 11:05 01:14:41 1968947 500 403 1 96 +385.59 +/- 34.96 ↓
142604 ncm-et-9 2021-01-31 11:01 01:14:11 1973893 500 391 1 108 +363.2 +/- 32.86 ↓
142603 ncm-et-3 2021-01-31 11:00 01:13:59 1976849 500 395 5 100 +363.2 +/- 34.35 ↓
142602 ncm-et-13 2021-01-31 09:52 01:14:12 1962148 500 394 0 106 +370.41 +/- 33.12 ↓
142601 ncm-et-15 2021-01-31 09:50 01:14:32 1965996 500 400 4 96 +374.11 +/- 35.07 ↓
142600 ncm-et-4 2021-01-31 09:50 01:14:19 1969395 500 411 3 86 +397.72 +/- 37.12 ↓
142599 ncm-et-10 2021-01-31 09:49 01:16:57 1954959 500 408 2 90 +393.6 +/- 36.22 ↓
142598 ncm-et-9 2021-01-31 09:45 01:14:19 1967082 500 395 2 103 +368.59 +/- 33.75 ↓
142597 ncm-et-3 2021-01-31 09:44 01:14:41 1969556 500 411 0 89 +404.05 +/- 36.31 ↓
142596 ncm-et-13 2021-01-31 08:36 01:14:56 1960770 500 402 1 97 +383.64 +/- 34.77 ↓
142595 ncm-et-4 2021-01-31 08:35 01:14:02 1970190 500 409 3 88 +393.6 +/- 36.68 ↓
142594 ncm-et-10 2021-01-31 08:34 01:14:23 1961703 500 407 3 90 +389.56 +/- 36.25 ↓
142593 ncm-et-15 2021-01-31 08:34 01:15:01 1968468 500 391 2 107 +361.43 +/- 33.08 ↓
142592 ncm-et-3 2021-01-31 08:30 01:13:30 1976382 500 392 3 105 +361.43 +/- 33.45 ↓
142591 ncm-et-9 2021-01-31 08:29 01:14:48 1968473 500 413 2 85 +404.05 +/- 37.32 ↓
142590 ncm-et-4 2021-01-31 07:18 01:15:30 1966160 500 400 2 98 +377.87 +/- 34.64 ↓
142589 ncm-et-13 2021-01-31 07:18 01:16:30 1958474 500 408 6 86 +385.59 +/- 37.11 ↓
142588 ncm-et-10 2021-01-31 07:18 01:15:18 1963845 500 403 1 96 +385.59 +/- 34.96 ↓
142587 ncm-et-15 2021-01-31 07:17 01:15:18 1972188 500 391 1 108 +363.2 +/- 32.86 ↓
142586 ncm-et-3 2021-01-31 07:14 01:14:39 1968323 500 412 4 84 +397.72 +/- 37.58 ↓
142585 ncm-et-9 2021-01-31 07:14 01:14:33 1965535 500 386 5 109 +347.77 +/- 32.85 ↓
142584 ncm-et-10 2021-01-31 06:01 01:15:27 1965858 500 407 2 91 +391.57 +/- 36.01 ↓
142583 ncm-et-13 2021-01-31 06:01 01:16:21 1916015 500 404 4 92 +381.7 +/- 35.86 ↓
142582 ncm-et-15 2021-01-31 06:00 01:15:51 1967086 500 395 1 104 +370.41 +/- 33.52 ↓
142581 ncm-et-3 2021-01-31 06:00 01:13:24 1977790 500 389 5 106 +352.8 +/- 33.33 ↓
142580 ncm-et-4 2021-01-31 06:00 01:17:18 1925307 500 383 3 114 +346.12 +/- 32.03 ↓
142579 ncm-et-9 2021-01-31 05:58 01:14:11 1972959 500 370 4 126 +324.17 +/- 30.42 ↓
142578 ncm-et-4 2021-01-31 04:44 01:14:18 1973588 500 398 2 100 +374.11 +/- 34.27 ↓
142577 ncm-et-13 2021-01-31 04:44 01:15:15 1963071 500 400 2 98 +377.87 +/- 34.64 ↓
142576 ncm-et-10 2021-01-31 04:44 01:15:52 1948893 500 402 3 95 +379.78 +/- 35.24 ↓
142575 ncm-et-15 2021-01-31 04:44 01:15:12 1974359 500 407 1 92 +393.6 +/- 35.75 ↓
142574 ncm-et-9 2021-01-31 04:44 01:13:15 1974834 500 395 1 104 +370.41 +/- 33.52 ↓
142573 ncm-et-3 2021-01-31 04:44 01:14:38 1964147 500 389 4 107 +354.5 +/- 33.15 ↓

Commit

Commit ID 1188141aa78d01c361582daaa73de5154b6d09b1
Author Stéphane Nicolet
Date 2021-01-30 12:20:56 UTC
Improve play for closed positions This patch give a small bonus to incite the attacking side to keep more pawns on the board. A consequence of this bonus is that Stockfish will tend to play positions slightly more closed on average than master, especially when it believes that it has an advantage. To lower the risk of blockades where Stockfish start shuffling without progress, we also implement a progressive decrease of the evaluation value with the 50 moves counter (along with the necessary aging of the transposition table to reduce the impact of the Graph History Interaction problem): since the evaluation decreases during shuffling phases, the engine will tend to examine the consequences of pawn breaks faster during the search. Passed STC: LLR: 2.96 (-2.94,2.94) {-0.25,1.25} Total: 26184 W: 2406 L: 2252 D: 21526 Ptnml(0-2): 85, 1784, 9223, 1892, 108 https://tests.stockfishchess.org/tests/view/600cc08b735dd7f0f0352c06 Passed LCT: LLR: 2.95 (-2.94,2.94) {0.25,1.25} Total: 199768 W: 7695 L: 7191 D: 184882 Ptnml(0-2): 85, 6478, 86269, 6952, 100 https://tests.stockfishchess.org/tests/view/600ccd28735dd7f0f0352c10 Closes https://github.com/official-stockfish/Stockfish/pull/3321 Bench: 3988915
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