Dev Builds » 20230202-1700

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 07:01:05 582930 4000 1218 846 1936 +32.41 ± 5.23 3 298 1029 664 6 +64.84 ± 10.6
ncm-dbt-02 07:01:17 585612 4008 1220 830 1958 +33.91 ± 5.08 2 271 1071 655 5 +67.95 ± 10.34
ncm-dbt-03 07:01:47 585817 4004 1234 842 1928 +34.12 ± 5.13 3 268 1076 644 11 +67.48 ± 10.31
ncm-dbt-04 07:00:17 569655 4000 1241 820 1939 +36.7 ± 5.01 3 248 1075 673 1 +74.61 ± 10.31
ncm-dbt-05 07:00:44 583535 3988 1187 837 1964 +30.57 ± 5.12 1 289 1070 627 7 +60.54 ± 10.35
20000 6100 4175 9725 +33.54 ± 2.29 12 1374 5321 3263 30 +67.08 ± 4.64

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
412179 ncm-dbt-03 586816 4 2 2 0 0.0 ± 17.0 0 0 2 0 0 -0.0 ± 15.22 ↓
412178 ncm-dbt-02 586139 8 2 2 4 -0.0 ± 125.78 0 1 2 1 0 -0.0 ± 296.58 ↓
412177 ncm-dbt-05 581610 488 154 105 229 +35.0 ± 13.47 1 22 149 71 1 +70.73 ± 26.9 ↓
412176 ncm-dbt-04 571391 500 175 110 215 +45.42 ± 13.73 0 25 135 90 0 +92.46 ± 29.02 ↓
412175 ncm-dbt-01 581943 500 150 106 244 +30.65 ± 15.43 1 39 128 79 3 +58.93 ± 30.13 ↓
412174 ncm-dbt-03 587070 500 167 111 222 +39.08 ± 14.44 0 33 128 89 0 +79.17 ± 30.09 ↓
412173 ncm-dbt-02 587113 500 153 93 254 +41.89 ± 14.07 0 29 132 89 0 +85.04 ± 29.5 ↓
412172 ncm-dbt-05 581402 500 143 101 256 +29.25 ± 13.92 0 34 140 76 0 +58.93 ± 28.51 ↓
412171 ncm-dbt-02 585337 500 154 116 230 +26.46 ± 14.52 0 40 132 78 0 +53.22 ± 29.61 ↓
412170 ncm-dbt-03 584706 500 160 112 228 +33.46 ± 14.86 2 32 133 82 1 +68.99 ± 29.43 ↓
412169 ncm-dbt-04 568116 500 147 90 263 +39.78 ± 14.08 0 30 133 87 0 +80.63 ± 29.38 ↓
412168 ncm-dbt-01 584369 500 165 120 215 +31.35 ± 15.48 1 40 124 83 2 +61.79 ± 30.65 ↓
412167 ncm-dbt-05 580904 500 155 123 222 +22.27 ± 14.08 0 39 140 71 0 +44.72 ± 28.57 ↓
412166 ncm-dbt-02 587325 500 150 109 241 +28.55 ± 13.74 0 33 143 74 0 +57.5 ± 28.1 ↓
412165 ncm-dbt-03 585885 500 144 108 248 +25.06 ± 14.81 0 40 137 70 3 +46.13 ± 28.97 ↓
412164 ncm-dbt-04 569749 500 161 102 237 +41.19 ± 13.89 0 28 135 87 0 +83.57 ± 29.08 ↓
412163 ncm-dbt-01 583279 500 150 97 253 +36.97 ± 14.96 0 38 121 91 0 +74.79 ± 31.04 ↓
412162 ncm-dbt-05 586858 500 143 100 257 +29.95 ± 13.7 0 32 143 75 0 +60.36 ± 28.08 ↓
412161 ncm-dbt-02 586689 500 141 99 260 +29.25 ± 14.97 2 34 136 76 2 +58.93 ± 29.06 ↓
412160 ncm-dbt-01 582652 500 163 104 233 +41.19 ± 15.21 0 38 115 97 0 +83.57 ± 31.84 ↓
412159 ncm-dbt-04 572880 500 164 109 227 +38.37 ± 14.4 1 30 132 87 0 +79.17 ± 29.53 ↓
412158 ncm-dbt-03 586985 500 151 108 241 +29.95 ± 14.63 1 34 138 75 2 +58.93 ± 28.79 ↓
412157 ncm-dbt-05 585843 500 147 96 257 +35.56 ± 15.98 0 44 114 89 3 +67.55 ± 31.94 ↓
412156 ncm-dbt-02 582778 500 157 102 241 +38.37 ± 14.92 0 36 124 89 1 +76.25 ± 30.64 ↓
412155 ncm-dbt-01 582736 500 133 99 268 +23.66 ± 14.71 0 43 130 77 0 +47.55 ± 29.89 ↓
412154 ncm-dbt-04 570268 500 152 101 247 +35.56 ± 14.35 0 33 134 82 1 +70.44 ± 29.29 ↓
412153 ncm-dbt-03 584411 500 152 102 246 +34.86 ± 14.83 0 36 130 82 2 +67.55 ± 29.85 ↓
412152 ncm-dbt-05 584579 500 142 101 257 +28.55 ± 15.78 0 47 117 84 2 +54.65 ± 31.54 ↓
412151 ncm-dbt-02 584748 500 167 119 214 +33.46 ± 14.74 0 38 126 86 0 +67.55 ± 30.39 ↓
412150 ncm-dbt-03 584958 500 154 118 228 +25.06 ± 14.81 0 40 137 70 3 +46.13 ± 28.97 ↓
412149 ncm-dbt-04 566770 500 133 89 278 +30.65 ± 14.42 0 37 132 81 0 +61.79 ± 29.59 ↓
412148 ncm-dbt-01 582027 500 157 102 241 +38.37 ± 14.53 0 33 130 86 1 +76.25 ± 29.82 ↓
412147 ncm-dbt-05 580779 500 151 104 245 +32.75 ± 14.17 0 33 138 78 1 +64.66 ± 28.76 ↓
412146 ncm-dbt-02 586139 500 156 96 248 +41.89 ± 14.21 0 29 133 87 1 +83.57 ± 29.37 ↓
412145 ncm-dbt-03 584285 500 146 92 262 +37.67 ± 13.53 0 27 142 81 0 +76.25 ± 28.11 ↓
412144 ncm-dbt-01 582193 500 161 114 225 +32.76 ± 13.76 1 28 144 77 0 +67.55 ± 27.89 ↓
412143 ncm-dbt-04 570029 500 150 107 243 +29.95 ± 14.37 1 34 136 79 0 +61.79 ± 29.05 ↓
412142 ncm-dbt-05 586308 500 152 107 241 +31.35 ± 14.6 0 38 129 83 0 +63.23 ± 29.99 ↓
412141 ncm-dbt-02 584243 500 140 94 266 +32.05 ± 13.85 0 31 143 75 1 +63.23 ± 28.06 ↓
412140 ncm-dbt-03 587240 500 158 89 253 +48.25 ± 14.03 0 26 129 95 0 +98.44 ± 29.86 ↓
412139 ncm-dbt-04 568037 500 159 112 229 +32.76 ± 14.17 1 31 138 80 0 +67.55 ± 28.74 ↓
412138 ncm-dbt-01 584243 500 139 104 257 +24.36 ± 14.24 0 39 137 74 0 +48.96 ± 28.96 ↓

Commit

Commit ID da8513f0eae439f526ab0a905a3433bdb44bcf66
Author Michael Chaly
Date 2023-02-02 17:00:14 UTC
Do less SEE pruning in qsearch Current master prunes all moves with negative SEE values in qsearch. This patch sets constant negative threshold thus allowing some moves with negative SEE values to be searched. Value of threshold is completely arbitrary and can be tweaked - also it as function of depth can be tried. Original idea by author of Alexandria engine. Passed STC https://tests.stockfishchess.org/tests/view/63d79a59a67dd929a5564976 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 34864 W: 9392 L: 9086 D: 16386 Ptnml(0-2): 113, 3742, 9429, 4022, 126 Passed LTC https://tests.stockfishchess.org/tests/view/63d8074aa67dd929a5565bc2 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 91616 W: 24532 L: 24126 D: 42958 Ptnml(0-2): 32, 8840, 27662, 9238, 36 closes https://github.com/official-stockfish/Stockfish/pull/4376 Bench: 4010877
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