Dev Builds » 20220328-2037

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 06:52:37 583306 4000 942 1008 2050 -5.73 ± 5.17 6 474 1103 414 3 -10.95 ± 10.2
ncm-dbt-02 06:52:42 585408 3988 964 1007 2017 -3.75 ± 5.15 3 465 1100 424 2 -7.32 ± 10.21
ncm-dbt-03 06:53:24 584437 4000 990 1006 2004 -1.39 ± 5.11 3 448 1112 436 1 -2.43 ± 10.15
ncm-dbt-04 06:53:35 569338 4012 976 1029 2007 -4.59 ± 5.0 5 446 1152 403 0 -8.32 ± 9.92
ncm-dbt-05 06:53:46 581135 4000 1016 1038 1946 -1.91 ± 5.07 2 446 1126 424 2 -3.82 ± 10.07
20000 4888 5088 10024 -3.47 ± 2.28 19 2279 5593 2101 8 -6.57 ± 4.52

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
432981 ncm-dbt-04 570629 12 3 2 7 +29.01 ± 131.8 0 2 1 3 0 +58.45 ± 350.58 ↓
432980 ncm-dbt-02 583656 488 122 116 250 +4.27 ± 15.03 1 52 131 60 0 +9.97 ± 29.74 ↓
432979 ncm-dbt-01 583363 500 133 130 237 +2.09 ± 14.36 2 48 145 55 0 +6.95 ± 27.97 ↓
432978 ncm-dbt-05 582235 500 135 132 233 +2.08 ± 13.83 0 50 147 53 0 +4.17 ± 27.7 ↓
432977 ncm-dbt-03 582235 500 125 102 273 +15.99 ± 14.25 0 44 139 67 0 +32.05 ± 28.73 ↓
432976 ncm-dbt-04 569549 500 124 128 248 -2.78 ± 13.89 0 54 146 50 0 -5.56 ± 27.84 ↓
432975 ncm-dbt-02 585337 500 123 129 248 -4.17 ± 14.41 0 59 138 53 0 -8.34 ± 28.89 ↓
432974 ncm-dbt-03 585084 500 130 143 227 -9.03 ± 14.45 1 60 140 49 0 -16.69 ± 28.62 ↓
432973 ncm-dbt-01 585801 500 111 129 260 -12.51 ± 14.99 0 70 128 52 0 -25.06 ± 30.16 ↓
432972 ncm-dbt-05 579496 500 125 142 233 -11.82 ± 14.04 0 62 143 45 0 -23.66 ± 28.22 ↓
432971 ncm-dbt-04 569470 500 124 127 249 -2.08 ± 14.09 0 55 143 52 0 -4.17 ± 28.24 ↓
432970 ncm-dbt-02 585590 500 116 127 257 -7.64 ± 14.46 0 62 137 51 0 -15.3 ± 29.02 ↓
432969 ncm-dbt-01 579001 500 120 137 243 -11.82 ± 14.94 0 68 132 49 1 -25.06 ± 29.65 ↓
432968 ncm-dbt-03 586308 500 115 123 262 -5.56 ± 14.54 0 61 136 53 0 -11.12 ± 29.15 ↓
432967 ncm-dbt-04 567403 500 126 130 244 -2.78 ± 14.03 0 55 144 51 0 -5.56 ± 28.1 ↓
432966 ncm-dbt-05 582235 500 125 111 264 +9.73 ± 14.77 0 52 132 66 0 +19.48 ± 29.66 ↓
432965 ncm-dbt-02 585674 500 112 127 261 -10.43 ± 15.2 1 66 131 51 1 -20.87 ± 29.78 ↓
432964 ncm-dbt-01 582945 500 110 124 266 -9.73 ± 14.38 3 53 150 43 1 -16.69 ± 27.28 ↓
432963 ncm-dbt-04 568275 500 117 130 253 -9.03 ± 14.45 2 57 143 48 0 -15.3 ± 28.23 ↓
432962 ncm-dbt-03 582360 500 123 133 244 -6.95 ± 14.66 1 60 137 52 0 -12.51 ± 29.02 ↓
432961 ncm-dbt-05 578794 500 127 125 248 +1.39 ± 13.63 0 49 150 51 0 +2.78 ± 27.29 ↓
432960 ncm-dbt-02 585421 500 122 128 250 -4.17 ± 14.67 0 61 134 55 0 -8.34 ± 29.41 ↓
432959 ncm-dbt-01 583447 500 111 110 279 +0.69 ± 14.74 0 58 133 59 0 +1.39 ± 29.53 ↓
432958 ncm-dbt-04 569190 500 111 116 273 -3.47 ± 14.22 0 57 141 52 0 -6.95 ± 28.5 ↓
432957 ncm-dbt-03 583279 500 130 133 237 -2.08 ± 14.48 0 58 137 55 0 -4.17 ± 29.02 ↓
432956 ncm-dbt-05 577315 500 137 141 222 -2.78 ± 14.42 1 55 141 53 0 -4.17 ± 28.5 ↓
432955 ncm-dbt-02 583447 500 119 123 258 -2.78 ± 14.16 0 56 142 52 0 -5.56 ± 28.37 ↓
432954 ncm-dbt-01 584748 500 128 141 231 -9.04 ± 14.71 0 65 133 52 0 -18.08 ± 29.53 ↓
432953 ncm-dbt-04 570749 500 117 140 243 -15.99 ± 13.3 0 60 153 37 0 -32.05 ± 26.81 ↓
432952 ncm-dbt-03 584327 500 113 125 262 -8.34 ± 14.52 0 63 136 51 0 -16.69 ± 29.14 ↓
432951 ncm-dbt-05 584034 500 125 125 250 -0.0 ± 14.03 0 53 144 53 0 -0.0 ± 28.1 ↓
432950 ncm-dbt-02 586689 500 123 121 256 +1.39 ± 14.16 1 49 148 51 1 +2.78 ± 27.57 ↓
432949 ncm-dbt-01 583908 500 111 127 262 -11.12 ± 13.71 1 56 151 42 0 -20.87 ± 27.13 ↓
432948 ncm-dbt-03 587240 500 135 117 248 +12.51 ± 14.09 1 42 145 62 0 +26.46 ± 27.94 ↓
432947 ncm-dbt-04 569031 500 127 118 255 +6.25 ± 13.26 0 43 155 52 0 +12.51 ± 26.59 ↓
432946 ncm-dbt-05 582152 500 125 123 252 +1.39 ± 15.42 0 61 128 59 2 -0.0 ± 30.16 ↓
432945 ncm-dbt-02 587452 500 127 136 237 -6.25 ± 14.34 0 60 139 51 0 -12.51 ± 28.76 ↓
432944 ncm-dbt-01 583237 500 118 110 272 +5.56 ± 15.04 0 56 131 62 1 +9.73 ± 29.79 ↓
432943 ncm-dbt-03 584664 500 119 130 251 -7.65 ± 14.33 0 60 142 47 1 -16.69 ± 28.36 ↓
432942 ncm-dbt-04 569749 500 127 138 235 -7.64 ± 15.7 3 63 126 58 0 -11.12 ± 30.41 ↓
432941 ncm-dbt-05 582819 500 117 139 244 -15.3 ± 14.32 1 64 141 44 0 -29.25 ± 28.47 ↓

Commit

Commit ID 08e0f52b77edb929989c68c49e954b9bc5d7d67e
Author Michael Chaly
Date 2022-03-28 20:37:09 UTC
In movepicker increase priority for moves that evade a capture This idea is a mix of koivisto idea of threat history and heuristic that was simplified some time ago in LMR - decreasing reduction for moves that evade a capture. Instead of doing so in LMR this patch does it in movepicker - to do this it calculates squares that are attacked by different piece types and pieces that are located on this squares and boosts up weight of moves that make this pieces land on a square that is not under threat. Boost is greater for pieces with bigger material values. Special thanks to koivisto and seer authors for explaining me ideas behind threat history. Passed STC: https://tests.stockfishchess.org/tests/view/62406e473b32264b9aa1478b LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 19816 W: 5320 L: 5072 D: 9424 Ptnml(0-2): 86, 2165, 5172, 2385, 100 Passed LTC: https://tests.stockfishchess.org/tests/view/62407f2e3b32264b9aa149c8 LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 51200 W: 13805 L: 13500 D: 23895 Ptnml(0-2): 44, 5023, 15164, 5322, 47 closes https://github.com/official-stockfish/Stockfish/pull/3970 bench 7736491
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