Dev Builds » 20230125-0651

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 07:00:21 583517 4000 1190 846 1964 +29.95 ± 5.26 4 306 1041 640 9 +59.46 ± 10.53
ncm-dbt-02 06:58:52 585354 4000 1251 834 1915 +36.35 ± 5.05 2 252 1080 659 7 +72.61 ± 10.28
ncm-dbt-03 06:58:10 584372 4000 1222 857 1921 +31.79 ± 5.07 3 277 1073 646 1 +64.48 ± 10.33
ncm-dbt-04 06:59:35 570242 4000 1221 858 1921 +31.62 ± 5.07 0 282 1079 633 6 +62.69 ± 10.3
ncm-dbt-05 06:59:32 583856 4000 1214 837 1949 +32.84 ± 5.15 3 283 1052 658 4 +66.1 ± 10.46
20000 6098 4232 9670 +32.51 ± 2.29 12 1400 5325 3236 27 +65.06 ± 4.64

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
412306 ncm-dbt-01 581444 500 152 101 247 +35.56 ± 14.61 1 33 130 86 0 +73.34 ± 29.83 ↓
412305 ncm-dbt-04 568792 500 153 112 235 +28.55 ± 13.6 0 30 151 67 2 +54.65 ± 26.97 ↓
412304 ncm-dbt-05 586985 500 149 116 235 +22.96 ± 14.4 0 40 138 71 1 +44.72 ± 28.84 ↓
412303 ncm-dbt-02 585337 500 158 104 238 +37.67 ± 14.22 0 31 135 83 1 +74.79 ± 29.13 ↓
412302 ncm-dbt-03 584622 500 141 118 241 +15.99 ± 13.99 1 39 146 64 0 +33.46 ± 27.78 ↓
412301 ncm-dbt-04 571833 500 135 110 255 +17.39 ± 14.75 0 47 131 72 0 +34.86 ± 29.77 ↓
412300 ncm-dbt-01 584201 500 146 114 240 +22.26 ± 14.6 0 41 138 69 2 +41.89 ± 28.84 ↓
412299 ncm-dbt-02 584706 500 163 102 235 +42.6 ± 14.91 0 33 125 90 2 +83.57 ± 30.49 ↓
412298 ncm-dbt-05 581610 500 148 108 244 +27.85 ± 14.87 0 42 126 82 0 +56.07 ± 30.4 ↓
412297 ncm-dbt-03 584664 500 157 99 244 +40.48 ± 14.26 0 30 133 86 1 +80.63 ± 29.38 ↓
412296 ncm-dbt-01 583572 500 154 123 223 +21.57 ± 14.68 1 41 134 74 0 +44.72 ± 29.37 ↓
412295 ncm-dbt-04 570228 500 143 103 254 +27.85 ± 14.23 0 37 136 77 0 +56.07 ± 29.07 ↓
412294 ncm-dbt-02 584411 500 149 110 241 +27.15 ± 14.83 0 42 127 81 0 +54.65 ± 30.27 ↓
412293 ncm-dbt-05 581361 500 148 103 249 +31.35 ± 15.11 1 38 127 83 1 +63.23 ± 30.26 ↓
412292 ncm-dbt-03 583279 500 154 118 228 +25.06 ± 14.68 0 42 130 78 0 +50.38 ± 29.88 ↓
412291 ncm-dbt-04 570148 500 159 97 244 +43.3 ± 14.42 0 30 129 90 1 +86.52 ± 29.92 ↓
412290 ncm-dbt-01 582945 500 140 99 261 +28.55 ± 15.05 0 42 126 81 1 +56.07 ± 30.4 ↓
412289 ncm-dbt-02 585421 500 175 109 216 +46.13 ± 13.63 0 23 139 87 1 +92.46 ± 28.41 ↓
412288 ncm-dbt-03 584579 500 157 97 246 +41.89 ± 14.21 0 30 130 90 0 +85.04 ± 29.79 ↓
412287 ncm-dbt-05 580489 500 143 99 258 +30.65 ± 13.89 0 33 140 77 0 +61.79 ± 28.49 ↓
412286 ncm-dbt-01 585506 500 150 94 256 +39.08 ± 15.08 1 32 130 84 3 +76.25 ± 29.82 ↓
412285 ncm-dbt-04 568554 500 152 109 239 +29.95 ± 15.02 0 41 126 82 1 +58.93 ± 30.4 ↓
412284 ncm-dbt-02 586350 500 145 101 254 +30.65 ± 13.05 0 27 152 71 0 +61.79 ± 26.76 ↓
412283 ncm-dbt-03 587113 500 148 99 253 +34.16 ± 15.16 1 38 122 89 0 +70.44 ± 30.91 ↓
412282 ncm-dbt-05 584411 500 163 113 224 +34.86 ± 14.44 0 35 130 85 0 +70.44 ± 29.84 ↓
412281 ncm-dbt-01 584832 500 145 100 255 +31.35 ± 15.6 0 44 119 85 2 +60.36 ± 31.3 ↓
412280 ncm-dbt-02 584664 500 154 110 236 +30.65 ± 14.02 1 31 141 77 0 +63.23 ± 28.35 ↓
412279 ncm-dbt-04 568713 500 160 111 229 +34.16 ± 14.39 0 35 131 84 0 +68.99 ± 29.71 ↓
412278 ncm-dbt-05 581985 500 158 99 243 +41.19 ± 14.7 2 27 132 88 1 +85.04 ± 29.5 ↓
412277 ncm-dbt-03 585042 500 153 104 243 +34.16 ± 14.39 0 35 131 84 0 +68.99 ± 29.71 ↓
412276 ncm-dbt-04 570629 500 156 107 237 +34.16 ± 14.91 0 37 129 82 2 +66.1 ± 29.99 ↓
412275 ncm-dbt-02 584916 500 147 97 256 +34.86 ± 14.83 1 35 127 87 0 +71.89 ± 30.24 ↓
412274 ncm-dbt-01 582652 500 153 104 243 +34.16 ± 14.13 0 32 138 79 1 +67.55 ± 28.74 ↓
412273 ncm-dbt-05 586689 500 159 106 235 +36.97 ± 14.7 0 35 128 86 1 +73.34 ± 30.1 ↓
412272 ncm-dbt-03 582360 500 155 108 237 +32.76 ± 14.56 1 34 132 83 0 +67.55 ± 29.58 ↓
412271 ncm-dbt-02 587028 500 160 101 239 +41.19 ± 14.57 0 30 134 83 3 +79.17 ± 29.25 ↓
412270 ncm-dbt-04 573042 500 163 109 228 +37.67 ± 13.25 0 25 146 79 0 +76.25 ± 27.52 ↓
412269 ncm-dbt-03 583321 500 157 114 229 +29.95 ± 13.28 0 29 149 72 0 +60.36 ± 27.22 ↓
412268 ncm-dbt-05 587325 500 146 93 261 +36.97 ± 14.31 0 33 131 86 0 +74.79 ± 29.69 ↓
412267 ncm-dbt-01 582987 500 150 111 239 +27.16 ± 15.08 1 41 126 82 0 +56.07 ± 30.4 ↓

Commit

Commit ID d3860f8d5efa4d9df726fa605b24689d6a829c7e
Author Michael Chaly
Date 2023-01-25 06:51:19 UTC
Rebalance usage of history heuristics in pruning This patch has multiple effects: * history heuristics sum in futility pruning now can't exceed some negative value so futility pruning for moves with negative histories should become slightly less aggressive; * history heuristics are now used in SEE pruning for quiet moves; Passed STC: https://tests.stockfishchess.org/tests/view/63cde339c93e8828d0f02e3a LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 88424 W: 23681 L: 23303 D: 41440 Ptnml(0-2): 258, 9559, 24219, 9899, 277 Passed LTC: https://tests.stockfishchess.org/tests/view/63ce9009c93e8828d0f04e4f LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 79536 W: 21223 L: 20843 D: 37470 Ptnml(0-2): 22, 7599, 24146, 7979, 22 closes https://github.com/official-stockfish/Stockfish/pull/4355 Bench: 4208265
Copyright 2011–2025 Next Chess Move LLC
Feedback & Support Terms of Service Privacy Policy Desktop Version