Dev Builds » 20230911-2036

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 06:54:49 584285 4002 1404 719 1879 +60.06 ± 4.98 2 166 984 843 6 +123.15 ± 10.79
ncm-dbt-02 06:54:27 586541 4006 1353 727 1926 +54.74 ± 4.96 1 176 1033 782 11 +110.42 ± 10.49
ncm-dbt-03 06:54:38 587129 4000 1370 721 1909 +56.87 ± 5.06 1 185 989 814 11 +115.03 ± 10.78
ncm-dbt-04 06:52:55 570144 4000 1370 669 1961 +61.52 ± 5.13 4 178 940 869 9 +126.18 ± 11.08
ncm-dbt-05 06:55:18 585135 3992 1374 698 1920 +59.41 ± 5.12 3 187 942 859 5 +122.11 ± 11.07
20000 6871 3534 9595 +58.52 ± 2.26 11 892 4888 4167 42 +119.34 ± 4.85

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
403634 ncm-dbt-01 589668 2 1 0 1 +189.7 ± 55.98 0 0 0 1 0 +1129.65 ± 376.02 ↓
403633 ncm-dbt-02 587537 6 2 1 3 +58.33 ± 98.71 0 0 2 1 0 +120.24 ± 264.77 ↓
403632 ncm-dbt-05 588728 492 170 92 230 +55.55 ± 14.3 0 23 123 99 1 +112.53 ± 30.62 ↓
403631 ncm-dbt-04 567284 500 164 100 236 +44.72 ± 14.64 0 32 122 96 0 +90.97 ± 30.89 ↓
403630 ncm-dbt-03 586816 500 167 90 243 +53.93 ± 14.73 0 29 115 106 0 +110.6 ± 31.86 ↓
403629 ncm-dbt-01 582987 500 170 80 250 +63.23 ± 14.2 0 22 116 112 0 +130.94 ± 31.66 ↓
403628 ncm-dbt-02 586012 500 167 101 232 +46.13 ± 13.34 0 20 146 82 2 +90.97 ± 27.35 ↓
403627 ncm-dbt-05 582444 500 169 81 250 +61.79 ± 14.95 1 24 112 112 1 +127.76 ± 32.29 ↓
403626 ncm-dbt-04 568474 500 168 84 248 +58.93 ± 14.15 0 22 123 104 1 +119.89 ± 30.63 ↓
403625 ncm-dbt-01 581652 500 184 88 228 +67.54 ± 14.09 0 18 120 110 2 +137.37 ± 30.98 ↓
403624 ncm-dbt-03 586985 500 161 85 254 +53.22 ± 13.44 0 18 140 90 2 +106.01 ± 28.1 ↓
403623 ncm-dbt-02 587155 500 175 83 242 +64.66 ± 14.8 0 24 112 112 2 +130.94 ± 32.29 ↓
403622 ncm-dbt-05 581361 500 170 86 244 +58.93 ± 14.96 0 29 108 113 0 +121.46 ± 32.88 ↓
403621 ncm-dbt-04 570789 500 165 75 260 +63.23 ± 13.63 0 18 124 108 0 +130.94 ± 30.38 ↓
403620 ncm-dbt-03 585885 500 171 98 231 +51.09 ± 13.9 0 24 129 97 0 +104.49 ± 29.82 ↓
403619 ncm-dbt-01 584495 500 173 92 235 +56.78 ± 14.46 0 24 123 101 2 +113.68 ± 30.67 ↓
403618 ncm-dbt-02 583321 500 159 94 247 +45.42 ± 13.87 0 25 136 88 1 +90.97 ± 28.88 ↓
403617 ncm-dbt-05 586901 500 165 81 254 +58.93 ± 15.09 1 27 109 113 0 +123.02 ± 32.74 ↓
403616 ncm-dbt-04 570228 500 178 86 236 +64.67 ± 14.53 2 18 116 114 0 +137.37 ± 31.63 ↓
403615 ncm-dbt-01 582068 500 180 94 226 +60.36 ± 13.79 1 15 133 99 2 +123.02 ± 29.0 ↓
403614 ncm-dbt-03 586985 500 170 87 243 +58.21 ± 14.93 1 23 121 102 3 +116.78 ± 30.96 ↓
403613 ncm-dbt-02 585506 500 168 87 245 +56.78 ± 14.73 1 24 119 105 1 +116.78 ± 31.26 ↓
403612 ncm-dbt-05 581402 500 180 82 238 +68.99 ± 13.86 0 17 119 113 1 +142.26 ± 31.1 ↓
403611 ncm-dbt-04 572155 500 172 76 252 +67.54 ± 13.95 0 18 119 112 1 +138.99 ± 31.13 ↓
403610 ncm-dbt-01 582444 500 170 79 251 +63.95 ± 13.66 0 18 123 109 0 +132.54 ± 30.53 ↓
403609 ncm-dbt-03 588004 500 174 75 251 +69.71 ± 14.45 0 19 116 112 3 +140.62 ± 31.61 ↓
403608 ncm-dbt-02 587494 500 168 76 256 +64.66 ± 13.09 0 14 130 106 0 +134.15 ± 29.34 ↓
403607 ncm-dbt-05 588771 500 172 91 237 +56.78 ± 14.32 0 24 122 103 1 +115.23 ± 30.81 ↓
403606 ncm-dbt-04 569151 500 177 81 242 +67.54 ± 15.32 0 25 108 113 4 +134.15 ± 32.9 ↓
403605 ncm-dbt-01 585337 500 167 89 244 +54.65 ± 14.36 0 26 120 104 0 +112.14 ± 31.13 ↓
403604 ncm-dbt-03 586646 500 159 99 242 +41.89 ± 14.21 0 30 130 90 0 +85.04 ± 29.79 ↓
403603 ncm-dbt-02 586646 500 161 91 248 +48.96 ± 14.34 0 25 133 89 3 +95.44 ± 29.29 ↓
403602 ncm-dbt-05 585928 500 170 100 230 +48.96 ± 14.2 0 26 129 94 1 +98.44 ± 29.86 ↓
403601 ncm-dbt-04 569629 500 167 84 249 +58.21 ± 15.06 0 30 107 113 0 +119.89 ± 33.02 ↓
403600 ncm-dbt-01 584832 500 180 96 224 +58.93 ± 14.01 1 19 125 105 0 +123.02 ± 30.3 ↓
403599 ncm-dbt-03 586604 500 187 99 214 +61.79 ± 14.14 0 20 124 104 2 +124.6 ± 30.44 ↓
403598 ncm-dbt-02 587664 500 177 96 227 +56.78 ± 14.6 0 26 118 105 1 +115.23 ± 31.41 ↓
403597 ncm-dbt-02 587537 500 176 98 226 +54.64 ± 13.37 0 18 137 94 1 +110.6 ± 28.52 ↓
403596 ncm-dbt-04 573446 500 179 83 238 +67.55 ± 14.65 2 15 121 109 3 +138.99 ± 30.8 ↓
403595 ncm-dbt-03 589112 500 181 88 231 +65.38 ± 14.42 0 22 114 113 1 +134.15 ± 31.97 ↓
403594 ncm-dbt-05 585548 500 178 85 237 +65.39 ± 14.0 1 17 120 112 0 +137.37 ± 30.98 ↓
403593 ncm-dbt-01 585084 500 179 101 220 +54.65 ± 14.08 0 24 124 102 0 +112.14 ± 30.53 ↓

Commit

Commit ID ef2282961602f47a9c0c11adc2c0da7af39dab0f
Author Michael Chaly
Date 2023-09-11 20:36:26 UTC
Do more futility pruning in qsearch This patch introduces a third futility pruning heuristic in qsearch. The idea is that the static exchange evaluation is much worse than the difference between futility base and alpha. Thus we can assume that the probability of the move being good enough to beat alpha is low so it can be pruned. Passed STC: https://tests.stockfishchess.org/tests/view/64fc982a5dab775b5359dc83 LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 36576 W: 9484 L: 9170 D: 17922 Ptnml(0-2): 121, 4119, 9495, 4431, 122 Passed LTC: https://tests.stockfishchess.org/tests/view/64fcc7935dab775b5359e1a9 LLR: 2.94 (-2.94,2.94) <0.50,2.50> Total: 135408 W: 34556 L: 34041 D: 66811 Ptnml(0-2): 56, 14462, 38165, 14953, 68 closes https://github.com/official-stockfish/Stockfish/pull/4781 Bench: 1330793
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