Dev Builds » 20211105-2118

Use this dev build

NCM plays each Stockfish dev build 20,000 times against Stockfish 15. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.

Summary

Host Duration Avg Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo
ncm-dbt-01 06:52:05 585899 4000 710 1326 1964 -53.93 ± 5.06 7 799 1000 191 3 -109.83 ± 10.71
ncm-dbt-02 06:52:43 586791 4000 713 1270 2017 -48.7 ± 5.21 8 779 978 232 3 -98.44 ± 10.87
ncm-dbt-03 06:51:11 586965 4000 743 1262 1995 -45.34 ± 5.18 8 749 999 242 2 -91.15 ± 10.75
ncm-dbt-04 06:51:23 572442 4000 718 1288 1994 -49.85 ± 5.17 11 771 1000 213 5 -100.71 ± 10.73
ncm-dbt-05 06:51:24 585297 4000 740 1329 1931 -51.53 ± 5.08 6 789 994 210 1 -104.49 ± 10.76
20000 3624 6475 9901 -49.87 ± 2.3 40 3887 4971 1088 14 -100.89 ± 4.81

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
380303 ncm-dbt-02 589753 500 94 155 251 -42.6 ± 14.38 0 92 127 31 0 -86.52 ± 30.2
380302 ncm-dbt-05 584159 500 90 170 240 -56.07 ± 15.09 1 108 111 30 0 -113.68 ± 32.44
380301 ncm-dbt-04 574094 500 91 156 253 -45.42 ± 14.68 1 93 127 28 1 -92.46 ± 30.18
380300 ncm-dbt-01 584201 500 91 157 252 -46.13 ± 14.18 1 91 131 27 0 -92.46 ± 29.6
380299 ncm-dbt-03 587113 500 88 169 243 -56.78 ± 14.46 2 101 123 24 0 -113.68 ± 30.67
380298 ncm-dbt-05 587409 500 100 173 227 -51.09 ± 15.11 1 103 114 32 0 -102.97 ± 32.0
380297 ncm-dbt-02 586223 500 104 172 224 -47.55 ± 14.79 1 96 124 28 1 -96.94 ± 30.59
380296 ncm-dbt-01 586097 500 95 173 232 -54.65 ± 14.63 1 102 122 24 1 -112.14 ± 30.83
380295 ncm-dbt-04 572477 500 96 164 240 -47.54 ± 14.53 1 95 125 29 0 -95.44 ± 30.46
380294 ncm-dbt-03 587664 500 90 150 260 -41.89 ± 14.99 1 93 121 35 0 -83.57 ± 31.04
380293 ncm-dbt-02 588643 500 82 154 264 -50.38 ± 15.07 1 102 115 32 0 -101.46 ± 31.86
380292 ncm-dbt-05 584495 500 82 152 266 -48.96 ± 14.07 1 93 131 25 0 -98.44 ± 29.57
380291 ncm-dbt-04 572800 500 94 164 242 -48.96 ± 13.5 2 85 145 17 1 -98.44 ± 27.41
380290 ncm-dbt-01 584369 500 81 173 246 -64.66 ± 14.53 1 112 116 20 1 -134.15 ± 31.65
380289 ncm-dbt-03 586393 500 99 153 248 -37.67 ± 14.61 2 82 135 30 1 -74.79 ± 29.13
380288 ncm-dbt-02 588345 500 98 150 252 -36.27 ± 14.66 0 87 129 33 1 -74.79 ± 29.96
380287 ncm-dbt-05 585632 500 96 161 243 -45.42 ± 14.94 1 95 123 30 1 -92.46 ± 30.75
380286 ncm-dbt-01 585548 500 94 163 243 -48.25 ± 14.3 1 94 128 27 0 -96.94 ± 30.02
380285 ncm-dbt-03 582152 500 89 159 252 -48.96 ± 14.87 1 99 119 31 0 -98.44 ± 31.3
380284 ncm-dbt-04 571913 500 97 167 236 -48.96 ± 14.2 1 94 129 26 0 -98.44 ± 29.86
380283 ncm-dbt-02 584285 500 83 169 248 -60.36 ± 14.62 3 102 124 20 1 -121.46 ± 30.47
380282 ncm-dbt-05 584874 500 94 162 244 -47.55 ± 13.85 0 93 132 25 0 -96.94 ± 29.43
380281 ncm-dbt-03 587962 500 104 162 234 -40.48 ± 15.29 1 94 117 38 0 -80.63 ± 31.58
380280 ncm-dbt-04 571551 500 82 166 252 -58.93 ± 14.83 4 100 122 24 0 -115.23 ± 30.81
380279 ncm-dbt-01 586350 500 98 162 240 -44.72 ± 14.9 1 95 121 33 0 -89.48 ± 31.03
380278 ncm-dbt-02 583489 500 85 153 262 -47.54 ± 15.43 2 99 114 35 0 -93.95 ± 31.99
380277 ncm-dbt-05 583950 500 94 176 230 -57.5 ± 14.08 0 105 122 23 0 -118.33 ± 30.8
380276 ncm-dbt-03 588004 500 85 155 260 -48.96 ± 14.87 0 101 119 29 1 -101.46 ± 31.3
380275 ncm-dbt-04 572155 500 89 165 246 -53.22 ± 15.08 1 105 113 31 0 -107.54 ± 32.15
380274 ncm-dbt-01 586097 500 78 159 263 -56.78 ± 13.48 1 96 137 15 1 -116.78 ± 28.43
380273 ncm-dbt-05 586858 500 85 167 248 -57.5 ± 13.66 1 99 131 19 0 -116.78 ± 29.4
380272 ncm-dbt-02 585506 500 82 153 265 -49.67 ± 14.24 0 98 125 27 0 -101.46 ± 30.43
380271 ncm-dbt-03 588856 500 90 155 255 -45.42 ± 14.14 1 90 132 27 0 -90.97 ± 29.47
380270 ncm-dbt-01 585506 500 84 171 245 -61.07 ± 13.53 0 105 127 18 0 -126.18 ± 29.94
380269 ncm-dbt-04 572195 500 87 153 260 -46.13 ± 14.85 0 98 121 30 1 -95.44 ± 31.02
380268 ncm-dbt-05 585000 500 99 168 233 -48.25 ± 14.16 1 93 130 26 0 -96.94 ± 29.72
380267 ncm-dbt-02 588089 500 85 164 251 -55.36 ± 14.53 1 103 120 26 0 -112.14 ± 31.13
380266 ncm-dbt-04 572356 500 82 153 265 -49.67 ± 15.29 1 101 118 28 2 -102.97 ± 31.44
380265 ncm-dbt-03 587579 500 98 159 243 -42.6 ± 13.98 0 89 133 28 0 -86.52 ± 29.35
380264 ncm-dbt-01 589027 500 89 168 243 -55.36 ± 14.66 1 104 118 27 0 -112.14 ± 31.42

Commit

Commit ID c2b9134c6e7637ea375b4755a6f96dc772c6bb17
Author Michael Chaly
Date 2021-11-05 21:18:59 UTC
Do more reductions at Pv nodes with low delta This patch increases reduction for PvNodes that have their delta (difference between beta and alpha) significantly reduced compared to what it was at root. passed STC https://tests.stockfishchess.org/tests/view/617f9063af49befdeee40226 LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 220840 W: 55752 L: 55150 D: 109938 Ptnml(0-2): 583, 24982, 58712, 25536, 607 passed LTC https://tests.stockfishchess.org/tests/view/61815de959e71df00dcc42ed LLR: 2.95 (-2.94,2.94) <0.50,3.00> Total: 79000 W: 19937 L: 19562 D: 39501 Ptnml(0-2): 36, 8190, 22674, 8563, 37 closes https://github.com/official-stockfish/Stockfish/pull/3774 bench: 6717808
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