Dev Builds » 20190201-1143

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 06:29:27 584282 3982 34 2719 1229 -284.4 ± 7.42 748 1189 54 0 0 -744.7 ± 47.43
ncm-dbt-02 06:29:00 591854 4008 50 2767 1191 -286.71 ± 7.69 782 1153 69 0 0 -702.61 ± 41.73
ncm-dbt-03 06:30:24 585878 3996 33 2705 1258 -280.84 ± 7.22 724 1225 48 1 0 -758.87 ± 50.45
ncm-dbt-04 06:29:53 568225 4016 33 2730 1253 -282.67 ± 7.17 732 1233 43 0 0 -786.25 ± 53.5
ncm-dbt-05 06:29:30 582377 3998 35 2733 1230 -284.75 ± 7.37 749 1200 50 0 0 -758.96 ± 49.39
20000 185 13654 6161 -283.87 ± 3.3 3735 6000 264 1 0 -748.13 ± 21.05

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
476144 ncm-dbt-02 593282 8 0 7 1 -468.91 ± 462.65 3 1 0 0 0 -1199.83 ± 250.99
476143 ncm-dbt-04 569470 16 1 8 7 -162.9 ± 50.11 0 7 1 0 0 -470.09 ± 466.68
476142 ncm-dbt-01 583782 482 4 323 155 -276.57 ± 19.97 83 153 5 0 0 -791.75 ± 231.31
476141 ncm-dbt-03 584411 496 7 334 155 -275.0 ± 21.21 89 150 8 1 0 -674.65 ± 142.42
476140 ncm-dbt-05 583279 498 8 339 151 -278.33 ± 20.99 91 149 9 0 0 -693.99 ± 134.17
476139 ncm-dbt-02 592116 500 4 330 166 -270.57 ± 19.13 82 162 6 0 0 -766.17 ± 188.02
476138 ncm-dbt-04 566888 500 3 333 164 -275.44 ± 19.41 85 160 5 0 0 -798.18 ± 231.48
476137 ncm-dbt-01 586223 500 3 342 155 -286.77 ± 21.65 97 145 8 0 0 -715.51 ± 146.53
476136 ncm-dbt-03 587622 500 2 350 148 -298.61 ± 21.46 101 146 3 0 0 -887.58 ± 222.18
476135 ncm-dbt-05 581194 500 5 347 148 -290.65 ± 21.81 99 144 7 0 0 -739.05 ± 163.27
476134 ncm-dbt-02 592159 500 7 356 137 -299.96 ± 23.52 108 133 9 0 0 -694.7 ± 134.18
476133 ncm-dbt-04 568077 500 4 347 149 -291.96 ± 21.34 98 147 5 0 0 -798.18 ± 231.48
476132 ncm-dbt-01 584369 500 3 346 151 -291.96 ± 21.34 98 147 5 0 0 -798.18 ± 231.48
476131 ncm-dbt-03 583279 500 6 337 157 -276.68 ± 20.74 90 151 9 0 0 -694.7 ± 134.18
476130 ncm-dbt-05 582819 500 4 331 165 -271.78 ± 19.86 85 157 8 0 0 -715.51 ± 146.53
476129 ncm-dbt-02 591555 500 8 335 157 -271.78 ± 20.98 89 149 12 0 0 -643.67 ± 110.29
476128 ncm-dbt-04 569749 500 9 331 160 -265.77 ± 19.41 81 160 9 0 0 -694.7 ± 134.18
476127 ncm-dbt-01 585421 500 5 335 160 -275.44 ± 19.71 86 158 6 0 0 -766.17 ± 188.02
476126 ncm-dbt-03 586774 500 3 342 155 -286.77 ± 20.43 93 153 4 0 0 -837.28 ± 240.94
476125 ncm-dbt-05 583028 500 6 350 144 -293.28 ± 22.12 101 142 7 0 0 -739.05 ± 163.27
476124 ncm-dbt-02 593802 500 1 346 153 -294.6 ± 21.01 98 149 3 0 0 -887.58 ± 222.18
476123 ncm-dbt-04 565784 500 2 348 150 -295.93 ± 20.83 98 150 2 0 0 -958.31 ± 196.57
476122 ncm-dbt-01 582360 500 2 333 165 -276.68 ± 19.86 87 157 6 0 0 -766.17 ± 188.02
476121 ncm-dbt-03 586223 500 4 338 158 -280.42 ± 20.3 90 154 6 0 0 -766.17 ± 188.02
476120 ncm-dbt-05 577520 500 2 345 153 -291.96 ± 21.03 97 149 4 0 0 -837.28 ± 240.94
476119 ncm-dbt-02 591599 500 10 347 143 -284.21 ± 21.93 97 143 10 0 0 -676.04 ± 124.55
476118 ncm-dbt-04 568275 500 4 345 151 -289.35 ± 21.96 99 143 8 0 0 -715.51 ± 146.53
476117 ncm-dbt-05 582694 500 5 346 149 -289.35 ± 21.96 99 143 8 0 0 -715.51 ± 146.53
476116 ncm-dbt-03 586816 500 3 340 157 -284.21 ± 20.13 91 155 4 0 0 -837.28 ± 240.94
476115 ncm-dbt-01 585548 500 8 340 152 -277.92 ± 21.45 93 146 11 0 0 -659.13 ± 116.77
476114 ncm-dbt-02 591211 500 6 355 139 -299.96 ± 23.82 109 131 10 0 0 -676.04 ± 124.55
476113 ncm-dbt-04 569350 500 2 330 168 -272.99 ± 18.19 80 168 2 0 0 -958.31 ± 196.57
476112 ncm-dbt-05 583447 500 1 330 169 -274.22 ± 18.34 81 167 2 0 0 -958.31 ± 196.57
476111 ncm-dbt-01 583154 500 6 349 145 -291.96 ± 22.86 103 137 10 0 0 -676.04 ± 124.55
476110 ncm-dbt-03 587070 500 4 333 163 -274.22 ± 19.86 86 157 7 0 0 -739.05 ± 163.27
476109 ncm-dbt-02 591039 500 7 342 151 -281.67 ± 21.34 94 147 9 0 0 -694.7 ± 134.18
476108 ncm-dbt-04 567086 500 5 342 153 -284.21 ± 20.75 93 151 6 0 0 -766.17 ± 188.02
476107 ncm-dbt-01 583405 500 3 351 146 -298.61 ± 21.46 101 146 3 0 0 -887.58 ± 222.18
476106 ncm-dbt-02 589924 500 7 349 144 -290.65 ± 22.7 102 138 10 0 0 -676.04 ± 124.55
476105 ncm-dbt-05 585042 500 4 345 151 -289.35 ± 21.04 96 149 5 0 0 -798.18 ± 231.48
476104 ncm-dbt-03 584832 500 4 331 165 -271.78 ± 19.57 84 159 7 0 0 -739.05 ± 163.27
476103 ncm-dbt-04 569350 500 3 346 151 -291.96 ± 21.34 98 147 5 0 0 -798.18 ± 231.48

Commit

Commit ID 3f7ec977cdae7a59c58342f3752bccb293d4e206
Author Vizvezdenec
Date 2019-02-01 11:43:33 UTC
More precise checks evaluation in king danger Remove overlapping safe checks from kingdanger: - rook and queen checks from the same square: rook check is preferred - bishop and queen checks form the same square: queen check is preferred Increase bishop and rook check values as a compensation. STC LLR: 2.95 (-2.94,2.94) [0.50,4.50] Total: 27480 W: 6111 L: 5813 D: 15556 http://tests.stockfishchess.org/tests/view/5c521d050ebc593af5d4e66a LTC LLR: 2.95 (-2.94,2.94) [0.00,3.50] Total: 78500 W: 13145 L: 12752 D: 52603 http://tests.stockfishchess.org/tests/view/5c52b9460ebc592fc7baecc5 Closes https://github.com/official-stockfish/Stockfish/pull/1983 ------------------------------------------ I have quite a few ideas of how to improve this patch. - actually rethinking it now it will maybe be useful to discount queen/bishop checks if there is only one square that they can give check from and it's "occupied" by more valuable check. Right now count of this squares does not really matter. - maybe some small extra bonus can be given for overlapping checks. - some ideas about using popcount() on safechecks can be retried. - tune this safecheck values since they were more or less randomly handcrafted in this patch. Bench: 3216489
Copyright 2011–2026 Next Chess Move LLC