Dev Builds » 20211218-1619

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 11:12:31 1957354 3338 2870 6 462 +446.7 +/- 15.86
ncm-et-4 11:12:16 1961395 3338 2901 8 429 +458.48 +/- 16.47
ncm-et-9 11:12:37 1956811 3349 2885 6 458 +448.9 +/- 15.93
ncm-et-10 11:12:26 1953109 3304 2857 3 444 +454.49 +/- 16.17
ncm-et-13 11:12:25 1960389 3336 2893 3 440 +457.95 +/- 16.24
ncm-et-15 11:12:08 1956994 3335 2900 2 433 +461.69 +/- 16.37
20000 17306 28 2666 +454.63 +/- 6.59

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
155373 ncm-et-10 2021-12-19 03:42 01:01:06 1951334 304 263 0 41 +456.31 +/- 54.44
155372 ncm-et-4 2021-12-19 03:35 01:07:26 1963995 338 299 2 37 +476.0 +/- 57.63
155371 ncm-et-3 2021-12-19 03:35 01:08:03 1940504 338 294 0 44 +462.9 +/- 52.48
155370 ncm-et-15 2021-12-19 03:34 01:08:45 1951037 335 288 0 47 +448.95 +/- 50.65
155369 ncm-et-13 2021-12-19 03:33 01:09:22 1951156 336 295 1 40 +470.44 +/- 55.32
155368 ncm-et-9 2021-12-19 03:32 01:11:21 1946129 349 294 0 55 +427.13 +/- 46.6
155367 ncm-et-10 2021-12-19 01:59 01:42:14 1952099 500 432 1 67 +452.04 +/- 42.22
155366 ncm-et-3 2021-12-19 01:55 01:39:26 1960773 500 436 2 62 +460.32 +/- 43.99
155365 ncm-et-4 2021-12-19 01:53 01:41:07 1960461 500 435 4 61 +452.04 +/- 44.3
155364 ncm-et-13 2021-12-19 01:53 01:40:00 1964924 500 440 0 60 +477.98 +/- 44.67
155363 ncm-et-15 2021-12-19 01:51 01:42:31 1947713 500 438 0 62 +471.92 +/- 43.9
155362 ncm-et-9 2021-12-19 01:50 01:40:43 1963071 500 426 1 73 +436.43 +/- 40.36
155361 ncm-et-10 2021-12-19 00:17 01:41:32 1956639 500 435 0 65 +463.15 +/- 42.83
155360 ncm-et-3 2021-12-19 00:13 01:40:45 1960307 500 433 0 67 +457.52 +/- 42.15
155359 ncm-et-4 2021-12-19 00:12 01:40:27 1959565 500 447 1 52 +497.4 +/- 48.23
155358 ncm-et-13 2021-12-19 00:12 01:39:38 1970637 500 428 1 71 +441.5 +/- 40.95
155357 ncm-et-15 2021-12-19 00:11 01:39:36 1962763 500 418 1 81 +417.32 +/- 38.22
155356 ncm-et-9 2021-12-19 00:08 01:41:39 1951316 500 435 0 65 +463.15 +/- 42.83
155355 ncm-et-10 2021-12-18 22:35 01:40:51 1950244 500 436 1 63 +463.16 +/- 43.6
155354 ncm-et-3 2021-12-18 22:33 01:39:29 1966158 500 428 1 71 +441.5 +/- 40.95
155353 ncm-et-15 2021-12-18 22:32 01:38:25 1964921 500 433 1 66 +454.76 +/- 42.55
155352 ncm-et-4 2021-12-18 22:30 01:41:33 1957720 500 427 1 72 +438.95 +/- 40.66
155351 ncm-et-13 2021-12-18 22:30 01:41:59 1951460 500 422 0 78 +429.05 +/- 38.92
155350 ncm-et-9 2021-12-18 22:28 01:39:13 1962152 500 442 1 57 +481.1 +/- 45.96
155349 ncm-et-10 2021-12-18 20:52 01:42:54 1956179 500 432 1 67 +452.04 +/- 42.22
155348 ncm-et-4 2021-12-18 20:50 01:39:55 1961082 500 435 0 65 +463.15 +/- 42.83
155347 ncm-et-3 2021-12-18 20:49 01:43:21 1956333 500 420 2 78 +419.61 +/- 39.03
155346 ncm-et-15 2021-12-18 20:49 01:41:43 1956648 500 440 0 60 +477.98 +/- 44.67
155345 ncm-et-13 2021-12-18 20:47 01:41:51 1956648 500 439 1 60 +471.92 +/- 44.73
155344 ncm-et-9 2021-12-18 20:46 01:41:30 1953457 500 435 1 64 +460.32 +/- 43.24
155343 ncm-et-3 2021-12-18 19:09 01:39:36 1961228 500 427 0 73 +441.5 +/- 40.29
155342 ncm-et-10 2021-12-18 19:09 01:42:22 1948276 500 424 0 76 +433.94 +/- 39.45
155341 ncm-et-9 2021-12-18 19:07 01:38:13 1962012 500 425 1 74 +433.94 +/- 40.08
155340 ncm-et-4 2021-12-18 19:07 01:42:00 1958936 500 430 0 70 +449.35 +/- 41.19
155339 ncm-et-15 2021-12-18 19:06 01:42:26 1955115 500 436 0 64 +466.03 +/- 43.18
155338 ncm-et-13 2021-12-18 19:06 01:41:01 1958496 500 430 0 70 +449.35 +/- 41.19
155337 ncm-et-15 2021-12-18 17:27 01:38:42 1960767 500 447 0 53 +500.82 +/- 47.69
155336 ncm-et-4 2021-12-18 17:27 01:39:48 1968008 500 428 0 72 +444.08 +/- 40.59
155335 ncm-et-9 2021-12-18 17:27 01:39:58 1959541 500 428 2 70 +438.95 +/- 41.29
155334 ncm-et-10 2021-12-18 17:27 01:41:27 1956994 500 435 0 65 +463.15 +/- 42.83
155333 ncm-et-3 2021-12-18 17:27 01:41:51 1956179 500 432 1 67 +452.04 +/- 42.22
155332 ncm-et-13 2021-12-18 17:26 01:38:34 1969408 500 439 0 61 +474.93 +/- 44.28

Commit

Commit ID 0a318cdddf8b6bdd05c2e0ee9b3b61a031d398ed
Author Michael Chaly
Date 2021-12-18 16:19:21 UTC
Adjust reductions based on current node delta and root delta This patch is a follow up of previous 2 patches that introduced more reductions for PV nodes with low delta and more pruning for nodes with low delta. Instead of writing separate heuristics now it adjust reductions based on delta / rootDelta - it allows to remove 3 separate adjustements of pruning/LMR in different places and also makes reduction dependence on delta and rootDelta smoother. Also now it works for all pruning heuristics and not just 2. Passed STC https://tests.stockfishchess.org/tests/view/61ba9b6c57a0d0f327c2d48b LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 79192 W: 20513 L: 20163 D: 38516 Ptnml(0-2): 238, 8900, 21024, 9142, 292 passed LTC https://tests.stockfishchess.org/tests/view/61baf77557a0d0f327c2eb8e LLR: 2.96 (-2.94,2.94) <0.50,3.00> Total: 158400 W: 41134 L: 40572 D: 76694 Ptnml(0-2): 101, 16372, 45745, 16828, 154 closes https://github.com/official-stockfish/Stockfish/pull/3862 bench 4651538
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