Dev Builds » 20230122-0955

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 06:59:51 583622 4006 1217 846 1943 +32.27 ± 5.05 4 266 1092 637 4 +65.1 ± 10.22
ncm-dbt-02 06:59:59 584905 3996 1192 850 1954 +29.81 ± 5.12 5 287 1068 637 1 +60.78 ± 10.37
ncm-dbt-03 06:58:54 581858 4000 1218 890 1892 +28.55 ± 5.18 5 301 1059 631 4 +57.68 ± 10.43
ncm-dbt-04 06:58:58 569781 4000 1173 841 1986 +28.9 ± 5.19 7 293 1066 629 5 +58.57 ± 10.38
ncm-dbt-05 07:00:26 578569 3998 1210 865 1923 +30.06 ± 5.1 1 290 1077 625 6 +59.67 ± 10.32
20000 6010 4292 9698 +29.92 ± 2.29 22 1437 5362 3159 20 +60.36 ± 4.62

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
430738 ncm-dbt-01 584790 6 0 1 5 -58.33 ± 98.71 0 1 2 0 0 -120.24 ± 264.77 ↓
430737 ncm-dbt-02 584159 496 144 108 244 +25.26 ± 13.72 0 34 144 70 0 +50.79 ± 27.94 ↓
430736 ncm-dbt-05 579207 498 158 102 238 +39.23 ± 13.53 0 26 141 82 0 +79.5 ± 28.21 ↓
430735 ncm-dbt-03 584579 500 143 107 250 +25.06 ± 14.68 2 35 139 73 1 +51.8 ± 28.68 ↓
430734 ncm-dbt-04 567601 500 140 128 232 +8.34 ± 14.0 0 47 144 59 0 +16.69 ± 28.09 ↓
430733 ncm-dbt-01 584034 500 160 97 243 +44.01 ± 14.06 1 25 134 90 0 +90.97 ± 29.17 ↓
430732 ncm-dbt-02 579951 500 145 108 247 +25.76 ± 14.6 1 38 134 77 0 +53.22 ± 29.35 ↓
430731 ncm-dbt-05 570989 500 156 104 240 +36.26 ± 14.66 0 34 132 82 2 +70.44 ± 29.57 ↓
430730 ncm-dbt-03 579661 500 161 112 227 +34.16 ± 14.65 0 36 130 83 1 +67.55 ± 29.85 ↓
430729 ncm-dbt-04 568514 500 151 113 236 +26.46 ± 14.9 2 37 132 79 0 +56.07 ± 29.61 ↓
430728 ncm-dbt-01 582736 500 155 109 236 +32.05 ± 14.52 0 37 130 83 0 +64.66 ± 29.86 ↓
430727 ncm-dbt-02 586520 500 142 101 257 +28.56 ± 15.05 1 40 126 83 0 +58.93 ± 30.4 ↓
430726 ncm-dbt-05 581153 500 159 107 234 +36.26 ± 14.26 0 32 135 82 1 +71.89 ± 29.14 ↓
430725 ncm-dbt-03 581153 500 149 106 245 +29.95 ± 14.89 1 37 131 80 1 +60.36 ± 29.73 ↓
430724 ncm-dbt-04 569430 500 138 103 259 +24.36 ± 14.63 2 35 140 72 1 +50.38 ± 28.55 ↓
430723 ncm-dbt-01 584537 500 149 106 245 +29.95 ± 14.5 0 37 134 78 1 +58.93 ± 29.33 ↓
430722 ncm-dbt-02 586520 500 143 99 258 +30.65 ± 15.19 1 39 126 83 1 +61.79 ± 30.39 ↓
430721 ncm-dbt-03 580862 500 152 121 227 +21.57 ± 14.42 0 42 135 73 0 +43.3 ± 29.24 ↓
430720 ncm-dbt-04 570509 500 152 100 248 +36.26 ± 15.29 1 36 125 86 2 +71.89 ± 30.51 ↓
430719 ncm-dbt-05 574784 500 141 108 251 +22.96 ± 14.78 0 43 132 74 1 +44.72 ± 29.63 ↓
430718 ncm-dbt-01 580406 500 145 99 256 +32.05 ± 14.25 0 35 134 81 0 +64.66 ± 29.31 ↓
430717 ncm-dbt-02 585590 500 157 115 228 +29.25 ± 14.19 0 36 136 78 0 +58.93 ± 29.06 ↓
430716 ncm-dbt-04 570989 500 152 96 252 +39.08 ± 14.44 0 33 128 89 0 +79.17 ± 30.09 ↓
430715 ncm-dbt-03 583070 500 141 117 242 +16.69 ± 14.17 0 43 140 67 0 +33.46 ± 28.6 ↓
430714 ncm-dbt-01 583824 500 150 107 243 +29.95 ± 13.7 0 32 143 75 0 +60.36 ± 28.08 ↓
430713 ncm-dbt-05 582193 500 139 95 266 +30.65 ± 15.06 1 39 125 85 0 +63.23 ± 30.52 ↓
430712 ncm-dbt-02 587113 500 163 105 232 +40.49 ± 14.12 1 27 135 87 0 +83.57 ± 29.08 ↓
430711 ncm-dbt-01 584664 500 151 116 233 +24.36 ± 13.56 1 31 150 68 0 +50.38 ± 27.14 ↓
430710 ncm-dbt-04 569709 500 150 104 246 +32.05 ± 14.77 0 37 132 79 2 +61.79 ± 29.59 ↓
430709 ncm-dbt-03 581527 500 146 115 239 +21.57 ± 14.29 0 41 137 72 0 +43.3 ± 28.97 ↓
430708 ncm-dbt-05 579372 500 141 108 251 +22.96 ± 14.4 0 40 138 71 1 +44.72 ± 28.84 ↓
430707 ncm-dbt-02 587028 500 152 115 233 +25.76 ± 14.21 0 38 137 75 0 +51.8 ± 28.95 ↓
430706 ncm-dbt-04 570308 500 147 88 265 +41.19 ± 14.43 1 29 130 90 0 +85.04 ± 29.79 ↓
430705 ncm-dbt-01 585169 500 156 106 238 +34.86 ± 14.83 0 36 130 82 2 +67.55 ± 29.85 ↓
430704 ncm-dbt-03 581111 500 174 103 223 +49.67 ± 14.51 0 28 124 97 1 +99.95 ± 30.58 ↓
430703 ncm-dbt-05 581860 500 158 121 221 +25.76 ± 14.21 0 38 137 75 0 +51.8 ± 28.95 ↓
430702 ncm-dbt-03 582903 500 152 109 239 +29.95 ± 15.39 2 39 123 86 0 +63.23 ± 30.78 ↓
430701 ncm-dbt-02 582360 500 146 99 255 +32.76 ± 14.69 1 35 130 84 0 +67.55 ± 29.85 ↓
430700 ncm-dbt-01 582444 500 151 105 244 +32.05 ± 14.77 2 32 135 80 1 +66.1 ± 29.17 ↓
430699 ncm-dbt-05 579001 500 158 120 222 +26.45 ± 14.39 0 38 137 74 1 +51.8 ± 28.95 ↓
430698 ncm-dbt-04 571190 500 143 109 248 +23.66 ± 14.58 1 39 135 75 0 +48.96 ± 29.23 ↓

Commit

Commit ID 734315ff3099564c80737ad2be8121008870d28b
Author Stephen Touset
Date 2023-01-22 09:55:32 UTC
Remove precomputed SquareBB Bit-shifting is a single instruction, and should be faster than an array lookup on supported architectures. Besides (ever so slightly) speeding up the conversion of a square into a bitboard, we may see minor general performance improvements due to preserving more of the CPU's existing cache. passed STC: LLR: 2.95 (-2.94,2.94) <-1.75,0.25> Total: 47280 W: 12469 L: 12271 D: 22540 Ptnml(0-2): 128, 4893, 13402, 5087, 130 https://tests.stockfishchess.org/tests/view/63c5cfe618c20f4929c5fe46 Small speedup locally: ``` Result of 20 runs ================== base (./stockfish.master ) = 1752135 +/- 10943 test (./stockfish.patch ) = 1763939 +/- 10818 diff = +11804 +/- 4731 speedup = +0.0067 P(speedup > 0) = 1.0000 CPU: 16 x AMD Ryzen 9 3950X 16-Core Processor ``` Closes https://github.com/official-stockfish/Stockfish/pull/4343 Bench: 4106793
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