Dev Builds » 20210822-0700

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 06:52:41 582030 4000 625 1378 1997 -66.19 ± 5.13 16 891 925 166 2 -134.75 ± 11.17
ncm-dbt-02 06:52:26 585862 3996 621 1364 2011 -65.36 ± 5.14 17 883 924 174 0 -132.29 ± 11.18
ncm-dbt-03 06:53:42 583803 4008 659 1372 1977 -62.47 ± 5.2 15 877 919 192 1 -126.49 ± 11.23
ncm-dbt-04 06:52:32 568582 4000 618 1333 2049 -62.78 ± 5.08 7 881 933 178 1 -128.75 ± 11.13
ncm-dbt-05 06:52:34 582411 3996 665 1378 1953 -62.66 ± 5.21 22 856 933 187 0 -125.33 ± 11.13
20000 3188 6825 9987 -63.89 ± 2.31 77 4388 4634 897 4 -129.51 ± 4.99

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
436610 ncm-dbt-03 582861 8 3 3 2 -0.0 ± 125.78 0 1 2 1 0 -0.0 ± 296.58
436609 ncm-dbt-05 582277 496 77 175 244 -69.56 ± 15.08 2 118 104 24 0 -141.89 ± 33.53
436608 ncm-dbt-02 585421 496 84 161 251 -54.37 ± 15.49 4 99 115 30 0 -105.39 ± 31.86
436607 ncm-dbt-01 581943 500 72 163 265 -63.95 ± 14.78 0 117 107 26 0 -132.54 ± 33.05
436606 ncm-dbt-03 583321 500 81 165 254 -58.93 ± 14.42 1 106 119 24 0 -119.89 ± 31.25
436605 ncm-dbt-04 568713 500 80 166 254 -60.36 ± 14.76 3 104 119 24 0 -119.89 ± 31.25
436604 ncm-dbt-02 585885 500 79 168 253 -62.51 ± 14.72 2 109 115 24 0 -126.18 ± 31.84
436603 ncm-dbt-05 582861 500 77 165 258 -61.79 ± 14.27 2 105 122 21 0 -124.6 ± 30.76
436602 ncm-dbt-01 579166 500 78 178 244 -70.43 ± 15.55 5 115 105 25 0 -138.99 ± 33.37
436601 ncm-dbt-04 568673 500 70 174 256 -73.34 ± 13.86 0 121 112 17 0 -153.86 ± 32.2
436600 ncm-dbt-03 584495 500 76 175 249 -69.71 ± 14.59 1 119 108 22 0 -143.89 ± 32.9
436599 ncm-dbt-02 585042 500 74 167 259 -65.38 ± 13.42 1 106 128 15 0 -134.15 ± 29.68
436598 ncm-dbt-05 578630 500 83 175 242 -64.66 ± 14.26 3 105 123 19 0 -129.35 ± 30.56
436597 ncm-dbt-03 585042 500 93 176 231 -58.21 ± 15.19 2 108 111 29 0 -116.78 ± 32.44
436596 ncm-dbt-01 582277 500 79 170 251 -63.95 ± 14.37 1 110 119 19 1 -132.54 ± 31.18
436595 ncm-dbt-04 570228 500 70 167 263 -68.27 ± 14.67 2 115 111 22 0 -138.99 ± 32.43
436594 ncm-dbt-02 587579 500 75 173 252 -68.99 ± 14.7 3 113 113 21 0 -138.99 ± 32.11
436593 ncm-dbt-05 583740 500 96 179 225 -58.21 ± 14.93 4 100 121 25 0 -113.68 ± 30.97
436592 ncm-dbt-03 580655 500 85 168 247 -58.21 ± 15.32 3 106 112 29 0 -115.23 ± 32.29
436591 ncm-dbt-01 583489 500 68 175 257 -75.52 ± 13.79 3 114 120 13 0 -153.86 ± 30.8
436590 ncm-dbt-04 568434 500 74 154 272 -56.07 ± 13.44 0 99 132 19 0 -115.23 ± 29.26
436589 ncm-dbt-02 588047 500 79 158 263 -55.36 ± 14.39 0 105 119 26 0 -113.68 ± 31.27
436588 ncm-dbt-05 579289 500 81 162 257 -56.78 ± 14.46 1 104 120 25 0 -115.23 ± 31.11
436587 ncm-dbt-01 581610 500 84 176 240 -64.66 ± 15.2 3 111 112 23 1 -130.94 ± 32.29
436586 ncm-dbt-03 585801 500 76 177 247 -71.16 ± 15.18 5 113 110 22 0 -140.62 ± 32.58
436585 ncm-dbt-04 565784 500 68 173 259 -74.06 ± 13.89 1 119 114 16 0 -153.86 ± 31.85
436584 ncm-dbt-02 586097 500 71 172 257 -71.16 ± 14.22 1 118 112 19 0 -147.19 ± 32.24
436583 ncm-dbt-05 584748 500 86 180 234 -66.1 ± 14.73 4 107 118 21 0 -130.94 ± 31.35
436582 ncm-dbt-01 580323 500 73 160 267 -61.07 ± 14.24 2 104 123 21 0 -123.02 ± 30.61
436581 ncm-dbt-03 583866 500 91 178 231 -61.07 ± 14.24 0 110 117 23 0 -126.18 ± 31.53
436580 ncm-dbt-04 570789 500 94 160 246 -46.13 ± 15.1 0 101 114 35 0 -93.95 ± 31.99
436579 ncm-dbt-02 585379 500 78 190 232 -79.17 ± 14.48 3 123 107 17 0 -162.35 ± 33.02
436578 ncm-dbt-05 586054 500 89 170 241 -56.78 ± 15.12 2 106 113 29 0 -113.68 ± 32.15
436577 ncm-dbt-01 583614 500 90 184 226 -66.1 ± 13.74 0 112 120 18 0 -137.37 ± 30.98
436576 ncm-dbt-03 583740 500 78 166 256 -61.79 ± 15.08 1 113 110 25 1 -127.76 ± 32.59
436575 ncm-dbt-04 569190 500 77 163 260 -60.36 ± 14.89 0 113 111 25 1 -126.18 ± 32.44
436574 ncm-dbt-05 581693 500 76 172 252 -67.54 ± 15.05 4 111 112 23 0 -134.15 ± 32.28
436573 ncm-dbt-02 583447 500 81 175 244 -66.1 ± 14.73 3 110 115 22 0 -132.54 ± 31.82
436572 ncm-dbt-01 583824 500 81 172 247 -63.94 ± 14.37 2 108 119 21 0 -129.35 ± 31.2
436571 ncm-dbt-04 566849 500 85 176 239 -63.94 ± 14.09 1 109 120 20 0 -130.94 ± 31.03
436570 ncm-dbt-03 584453 500 76 164 260 -61.79 ± 13.71 2 101 130 17 0 -124.6 ± 29.47

Commit

Commit ID e57d2d9d4714fd085042f88a037be93772956105
Author bmc4
Date 2021-08-22 07:00:15 UTC
Simplify Null Move Search Reduction slightly simpler formula for reduction computation. first round of tests: STC: LLR: 2.97 (-2.94,2.94) <-2.50,0.50> Total: 15632 W: 1319 L: 1204 D: 13109 Ptnml(0-2): 33, 956, 5733, 1051, 43 https://tests.stockfishchess.org/tests/view/60bd03c7457376eb8bcaa600 LTC: LLR: 3.37 (-2.94,2.94) <-2.50,0.50> Total: 86296 W: 2814 L: 2779 D: 80703 Ptnml(0-2): 33, 2500, 38039, 2551, 25 https://tests.stockfishchess.org/tests/view/60bd1ff0457376eb8bcaa653 recent tests: STC: LLR: 2.93 (-2.94,2.94) <-2.50,0.50> Total: 23936 W: 1895 L: 1793 D: 20248 Ptnml(0-2): 40, 1470, 8869, 1526, 63 https://tests.stockfishchess.org/tests/view/611f9b7d4977aa1525c9cb6b LTC: LLR: 2.95 (-2.94,2.94) <-2.50,0.50> Total: 62568 W: 1750 L: 1713 D: 59105 Ptnml(0-2): 19, 1560, 28085, 1605, 15 https://tests.stockfishchess.org/tests/view/611fa4814977aa1525c9cb71 functional on high depth closes https://github.com/official-stockfish/Stockfish/pull/3535 Bench: 5375286
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