Dev Builds » 20230209-0645

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 07:01:26 583212 4000 1198 868 1934 +28.73 ± 5.08 1 295 1080 621 3 +57.5 ± 10.3
ncm-dbt-02 07:01:52 585284 4002 1237 834 1931 +35.11 ± 5.17 1 282 1037 675 6 +70.04 ± 10.54
ncm-dbt-03 07:01:35 585121 4000 1183 835 1982 +30.3 ± 5.08 2 284 1082 628 4 +60.72 ± 10.29
ncm-dbt-04 07:00:19 569148 4000 1223 814 1963 +35.65 ± 5.23 3 287 1012 694 4 +71.89 ± 10.69
ncm-dbt-05 07:01:34 583443 3998 1220 835 1943 +33.56 ± 5.24 5 291 1020 680 3 +68.12 ± 10.65
20000 6061 4186 9753 +32.67 ± 2.31 12 1439 5231 3298 20 +65.64 ± 4.69

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
412091 ncm-dbt-02 588472 2 1 0 1 +189.7 ± 55.98 0 0 0 1 0 +1129.65 ± 376.02 ↓
412090 ncm-dbt-05 582611 498 163 104 231 +41.36 ± 14.62 1 30 127 91 0 +85.4 ± 30.2 ↓
412089 ncm-dbt-03 584916 500 152 122 226 +20.87 ± 15.01 1 43 132 73 1 +41.89 ± 29.63 ↓
412088 ncm-dbt-01 583447 500 145 106 249 +27.15 ± 14.31 0 38 135 77 0 +54.65 ± 29.21 ↓
412087 ncm-dbt-04 569629 500 160 99 241 +42.6 ± 15.29 0 36 119 93 2 +83.57 ± 31.31 ↓
412086 ncm-dbt-02 584243 500 163 100 237 +44.01 ± 14.6 0 32 123 95 0 +89.48 ± 30.76 ↓
412085 ncm-dbt-03 589497 500 153 99 248 +37.67 ± 13.95 0 30 136 84 0 +76.25 ± 28.98 ↓
412084 ncm-dbt-05 581902 500 143 113 244 +20.87 ± 15.26 0 48 125 76 1 +40.48 ± 30.53 ↓
412083 ncm-dbt-01 582903 500 152 104 244 +33.46 ± 13.94 0 31 141 77 1 +66.1 ± 28.33 ↓
412082 ncm-dbt-02 586012 500 153 111 236 +29.25 ± 14.84 0 41 126 83 0 +58.93 ± 30.4 ↓
412081 ncm-dbt-04 570589 500 157 105 238 +36.26 ± 14.66 0 35 129 85 1 +71.89 ± 29.97 ↓
412080 ncm-dbt-05 580738 500 160 96 244 +44.72 ± 13.97 0 27 132 91 0 +90.97 ± 29.47 ↓
412079 ncm-dbt-03 583824 500 143 105 252 +26.46 ± 14.39 0 39 134 77 0 +53.22 ± 29.35 ↓
412078 ncm-dbt-01 583447 500 155 115 230 +27.85 ± 14.62 0 39 133 77 1 +54.65 ± 29.48 ↓
412077 ncm-dbt-02 586731 500 152 96 252 +39.08 ± 14.57 0 34 126 90 0 +79.17 ± 30.36 ↓
412076 ncm-dbt-04 567997 500 148 106 246 +29.25 ± 14.84 2 35 132 81 0 +61.79 ± 29.59 ↓
412075 ncm-dbt-05 582193 500 154 99 247 +38.37 ± 15.04 1 34 125 89 1 +77.71 ± 30.5 ↓
412074 ncm-dbt-03 583363 500 147 122 231 +17.39 ± 13.7 0 39 147 64 0 +34.86 ± 27.64 ↓
412073 ncm-dbt-01 582611 500 149 104 247 +31.35 ± 14.86 0 40 125 85 0 +63.23 ± 30.52 ↓
412072 ncm-dbt-04 567165 500 140 98 262 +29.25 ± 15.09 0 43 122 85 0 +58.93 ± 30.91 ↓
412071 ncm-dbt-02 585885 500 146 100 254 +32.05 ± 15.03 0 40 125 84 1 +63.23 ± 30.52 ↓
412070 ncm-dbt-01 583950 500 153 112 235 +28.55 ± 14.14 0 35 140 74 1 +56.07 ± 28.52 ↓
412069 ncm-dbt-05 580157 500 147 94 259 +36.97 ± 15.33 1 38 118 93 0 +76.25 ± 31.44 ↓
412068 ncm-dbt-03 585674 500 151 103 246 +33.46 ± 14.48 0 34 136 78 2 +64.66 ± 29.04 ↓
412067 ncm-dbt-02 586816 500 157 121 222 +25.06 ± 13.89 0 36 142 72 0 +50.38 ± 28.27 ↓
412066 ncm-dbt-04 569909 500 147 104 249 +29.95 ± 14.11 0 35 137 78 0 +60.36 ± 28.92 ↓
412065 ncm-dbt-01 582277 500 147 103 250 +30.65 ± 13.33 0 29 148 73 0 +61.79 ± 27.35 ↓
412064 ncm-dbt-03 584495 500 143 100 257 +29.95 ± 13.7 0 32 143 75 0 +60.36 ± 28.08 ↓
412063 ncm-dbt-05 578342 500 158 93 249 +45.42 ± 14.55 1 27 129 92 1 +92.46 ± 29.89 ↓
412062 ncm-dbt-04 567482 500 157 104 239 +36.97 ± 14.7 0 36 125 89 0 +74.79 ± 30.51 ↓
412061 ncm-dbt-02 581777 500 149 100 251 +34.16 ± 15.16 1 36 128 83 2 +67.55 ± 30.12 ↓
412060 ncm-dbt-01 583154 500 149 112 239 +25.76 ± 15.72 1 47 116 86 0 +53.22 ± 31.67 ↓
412059 ncm-dbt-03 584117 500 148 99 253 +34.16 ± 14.65 1 33 133 82 1 +68.99 ± 29.43 ↓
412058 ncm-dbt-05 581444 500 139 117 244 +15.3 ± 14.45 0 46 136 68 0 +30.65 ± 29.13 ↓
412057 ncm-dbt-02 581444 500 160 104 236 +39.08 ± 13.48 0 25 145 79 1 +77.71 ± 27.66 ↓
412056 ncm-dbt-04 570629 500 157 99 244 +40.48 ± 15.04 1 33 124 91 1 +82.1 ± 30.63 ↓
412055 ncm-dbt-05 600159 500 156 119 225 +25.76 ± 14.98 1 41 128 80 0 +53.22 ± 30.14 ↓
412054 ncm-dbt-01 583908 500 148 112 240 +25.06 ± 13.89 0 36 142 72 0 +50.38 ± 28.27 ↓
412053 ncm-dbt-03 585084 500 146 85 269 +42.6 ± 14.78 0 34 121 95 0 +86.52 ± 31.04 ↓
412052 ncm-dbt-04 569789 500 157 99 244 +40.48 ± 14.65 0 34 124 92 0 +82.1 ± 30.63 ↓
412051 ncm-dbt-02 586181 500 156 102 242 +37.67 ± 15.25 0 38 122 88 2 +73.34 ± 30.91 ↓

Commit

Commit ID 8f843633db3faaf447cc191cbaed9f5ddfd374bd
Author Michael Chaly
Date 2023-02-09 06:45:05 UTC
Cleanup and reorder in qsearch This patch is a simplification / code normalisation in qsearch. Adds steps in comments the same way we have in search; Makes a separate "pruning" stage instead of heuristics randomly being spread over qsearch code; Reorders pruning heuristics from least taxing ones to more taxing ones; Removes repeated check for best value not being mated, instead uses 1 check - thus removes some lines of code. Moves prefetch and move setup after pruning - makes no sense to do them if move will actually get pruned. Passed non-regression test: https://tests.stockfishchess.org/tests/view/63dd2c5ff9a50a69252c1413 LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 113504 W: 29898 L: 29770 D: 53836 Ptnml(0-2): 287, 11861, 32327, 11991, 286 https://github.com/official-stockfish/Stockfish/pull/4382 Non-functional change.
Copyright 2011–2025 Next Chess Move LLC
Feedback & Support Terms of Service Privacy Policy Desktop Version