Dev Builds » 20220417-1938

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 11:22:01 1957447 3344 2857 7 480 +439.3 +/- 15.55
ncm-et-4 11:22:19 1941203 3312 2865 17 430 +449.23 +/- 16.46
ncm-et-9 11:22:21 1965936 3377 2879 8 490 +436.64 +/- 15.4
ncm-et-10 11:03:34 1954852 3239 2747 5 487 +432.17 +/- 15.43
ncm-et-13 11:21:58 1961741 3353 2844 5 504 +432.35 +/- 15.17
ncm-et-15 11:22:15 1962493 3375 2853 7 515 +428.16 +/- 15.01
20000 17045 49 2906 +436.18 +/- 6.31

Test Detail

ID Host Started (UTC) Duration Base NPS Games Wins Losses Draws Elo CLI PGN
158047 ncm-et-10 2022-04-19 11:49 00:37:57 1958322 187 157 0 30 +423.76 +/- 64.11
158046 ncm-et-10 2022-04-19 11:45 00:01:10 1925370 3 2 0 1 +279.24 +/- 576.89
158045 ncm-et-4 2022-04-19 11:42 00:45:08 1953443 218 183 0 35 +423.62 +/- 59.05
158044 ncm-et-3 2022-04-19 11:42 00:45:12 1938491 216 189 0 27 +470.42 +/- 68.13
158043 ncm-et-9 2022-04-19 11:40 00:47:48 1972993 238 206 2 30 +445.58 +/- 64.36
158042 ncm-et-15 2022-04-19 11:39 00:48:53 1959542 237 198 0 39 +418.96 +/- 55.74
158041 ncm-et-13 2022-04-19 11:38 00:49:05 1967239 244 207 0 37 +434.38 +/- 57.39
158040 ncm-et-3 2022-04-19 10:01 01:40:51 1961424 500 427 0 73 +441.5 +/- 40.29
158039 ncm-et-4 2022-04-19 09:59 01:42:23 1958168 500 432 3 65 +446.7 +/- 42.92
158038 ncm-et-9 2022-04-19 09:58 01:40:50 1964768 500 416 3 81 +408.38 +/- 38.29
158037 ncm-et-10 2022-04-19 09:58 01:41:57 1955575 499 431 0 68 +454.38 +/- 41.82
158036 ncm-et-13 2022-04-19 09:57 01:40:06 1964147 500 434 0 66 +460.32 +/- 42.48
158035 ncm-et-15 2022-04-19 09:57 01:40:50 1960771 500 417 3 80 +410.58 +/- 38.54
158034 ncm-et-10 2022-04-19 08:16 01:41:10 1973736 500 437 1 62 +466.04 +/- 43.97
158033 ncm-et-15 2022-04-19 08:16 01:40:20 1963840 500 426 0 74 +438.95 +/- 40.01
158032 ncm-et-3 2022-04-19 08:16 01:43:38 1956177 500 428 1 71 +441.5 +/- 40.95
158031 ncm-et-9 2022-04-19 08:16 01:41:31 1961076 500 432 0 68 +454.76 +/- 41.82
158030 ncm-et-13 2022-04-19 08:16 01:40:43 1963384 500 414 1 85 +408.38 +/- 37.27
158029 ncm-et-4 2022-04-19 08:16 01:42:33 1951284 500 442 2 56 +477.99 +/- 46.39
157985 ncm-et-10 2022-04-18 20:40 00:10:42 1956493 46 36 0 10 +365.49 +/- 118.64
157984 ncm-et-4 2022-04-18 20:31 00:20:16 1908465 94 82 0 12 +466.5 +/- 108.41
157983 ncm-et-13 2022-04-18 20:28 00:22:47 1960478 109 102 0 7 +591.62 +/- 160.59
157982 ncm-et-3 2022-04-18 20:25 00:26:07 1960350 128 111 1 16 +448.52 +/- 91.3
157981 ncm-et-9 2022-04-18 20:22 00:28:28 1963532 139 118 1 20 +426.33 +/- 80.36
157980 ncm-et-15 2022-04-18 20:21 00:29:29 1958931 138 120 0 18 +462.52 +/- 85.28
157979 ncm-et-10 2022-04-18 18:57 01:42:26 1954668 500 423 1 76 +429.05 +/- 39.52
157978 ncm-et-10 2022-04-18 18:52 00:01:10 1961539 3 2 0 1 +279.24 +/- 576.89
157977 ncm-et-10 2022-04-18 18:48 00:01:00 1944817 1 0 0 1 0.0 +/- 30.47
157976 ncm-et-13 2022-04-18 18:45 01:41:58 1958168 500 423 1 76 +429.05 +/- 39.52
157975 ncm-et-4 2022-04-18 18:44 01:45:50 1898540 500 429 4 67 +436.43 +/- 42.22
157973 ncm-et-3 2022-04-18 18:42 01:42:25 1956212 500 424 2 74 +429.05 +/- 40.11
157972 ncm-et-15 2022-04-18 18:41 01:39:53 1964945 500 428 1 71 +441.5 +/- 40.95
157971 ncm-et-9 2022-04-18 18:40 01:42:07 1970338 500 427 0 73 +441.5 +/- 40.29
157970 ncm-et-10 2022-04-18 17:03 01:39:54 1959709 500 413 2 85 +404.05 +/- 37.32
157969 ncm-et-13 2022-04-18 17:01 01:43:36 1957096 500 413 1 86 +406.2 +/- 37.04
157968 ncm-et-3 2022-04-18 17:01 01:40:19 1962766 500 428 2 70 +438.95 +/- 41.29
157967 ncm-et-9 2022-04-18 17:00 01:38:39 1963845 500 425 1 74 +433.94 +/- 40.08
157966 ncm-et-15 2022-04-18 17:00 01:39:49 1964020 500 411 3 86 +397.72 +/- 37.12
157965 ncm-et-4 2022-04-18 17:00 01:43:33 1932441 500 440 2 58 +471.92 +/- 45.55
157964 ncm-et-15 2022-04-18 15:20 01:39:09 1971103 500 422 0 78 +429.05 +/- 38.92
157963 ncm-et-10 2022-04-18 15:20 01:43:04 1955579 500 428 0 72 +444.08 +/- 40.59
157962 ncm-et-3 2022-04-18 15:19 01:41:20 1960317 500 419 0 81 +421.93 +/- 38.15
157961 ncm-et-9 2022-04-18 15:19 01:40:51 1962630 500 428 1 71 +441.5 +/- 40.95
157960 ncm-et-13 2022-04-18 15:18 01:42:02 1965080 500 426 1 73 +436.43 +/- 40.36
157959 ncm-et-4 2022-04-18 15:17 01:42:25 1959710 500 426 3 71 +431.48 +/- 41.0
157958 ncm-et-9 2022-04-18 13:36 01:42:07 1968312 500 427 0 73 +441.5 +/- 40.29
157957 ncm-et-13 2022-04-18 13:36 01:41:41 1958339 500 425 1 74 +433.94 +/- 40.08
157956 ncm-et-3 2022-04-18 13:36 01:42:09 1963841 500 431 1 68 +449.35 +/- 41.89
157955 ncm-et-15 2022-04-18 13:36 01:43:52 1956798 500 431 0 69 +452.04 +/- 41.5
157954 ncm-et-10 2022-04-18 13:36 01:43:04 1957568 500 418 1 81 +417.32 +/- 38.22
157953 ncm-et-4 2022-04-18 13:36 01:40:11 1967573 500 431 3 66 +444.09 +/- 42.58

Commit

Commit ID df2f7e75276cc93a8cb8c70057903ab0edbd92bd
Author KJE-98
Date 2022-04-17 19:38:05 UTC
Decrease LMR at PV nodes with low depth. This patch lessens the Late Move Reduction at PV nodes with low depth. Previously the affect of depth on LMR was independant of nodeType. The idea behind this patch is that at PV nodes, LMR at low depth is will miss out on potential alpha-raising moves. Passed STC: https://tests.stockfishchess.org/tests/view/625aa867d3367522c4b8965c LLR: 2.93 (-2.94,2.94) <0.00,2.50> Total: 19360 W: 5252 L: 5006 D: 9102 Ptnml(0-2): 79, 2113, 5069, 2321, 98 Passed LTC: https://tests.stockfishchess.org/tests/view/625ae844d3367522c4b8a009 LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 39264 W: 10636 L: 10357 D: 18271 Ptnml(0-2): 18, 3928, 11473, 4183, 30 closes https://github.com/official-stockfish/Stockfish/pull/3985 bench: 8129754
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