Dev Builds » 20220205-0640

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 06:57:07 584635 4000 905 1191 1904 -24.88 ± 5.14 9 583 1098 305 5 -49.32 ± 10.2
ncm-dbt-02 06:57:19 588276 4000 915 1150 1935 -20.44 ± 5.2 6 573 1075 342 4 -40.66 ± 10.35
ncm-dbt-03 06:56:15 588066 4014 908 1161 1945 -21.93 ± 5.16 6 579 1088 330 4 -43.68 ± 10.27
ncm-dbt-04 06:56:33 566116 4000 907 1132 1961 -19.56 ± 5.22 10 556 1089 339 6 -38.55 ± 10.27
ncm-dbt-05 06:58:14 584131 3986 897 1138 1951 -21.03 ± 5.32 7 587 1047 344 8 -42.4 ± 10.5
20000 4532 5772 9696 -21.57 ± 2.33 38 2878 5397 1660 27 -42.92 ± 4.61

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
372578 ncm-dbt-03 587664 14 4 5 5 -24.85 ± 84.38 0 2 4 1 0 -49.98 ± 184.5
372577 ncm-dbt-05 585379 486 125 145 216 -14.31 ± 15.66 1 68 126 46 2 -30.1 ± 30.38
372576 ncm-dbt-02 590396 500 126 133 241 -4.87 ± 14.86 0 62 134 53 1 -11.12 ± 29.4
372575 ncm-dbt-01 582611 500 106 139 255 -22.96 ± 14.27 1 70 140 39 0 -44.72 ± 28.57
372574 ncm-dbt-04 565587 500 110 146 244 -25.06 ± 15.06 2 75 130 43 0 -47.55 ± 29.89
372573 ncm-dbt-03 588387 500 109 143 248 -23.66 ± 14.58 1 72 138 38 1 -47.55 ± 28.83
372572 ncm-dbt-05 586012 500 102 137 261 -24.36 ± 15.26 2 75 130 42 1 -47.55 ± 29.89
372571 ncm-dbt-02 587919 500 108 146 246 -26.45 ± 14.78 2 74 134 40 0 -50.38 ± 29.35
372570 ncm-dbt-01 582569 500 111 151 238 -27.85 ± 14.36 1 74 140 34 1 -56.07 ± 28.52
372569 ncm-dbt-04 564527 500 117 131 252 -9.73 ± 14.51 1 61 139 49 0 -18.08 ± 28.75
372568 ncm-dbt-03 588217 500 108 138 254 -20.87 ± 14.63 2 67 141 39 1 -40.48 ± 28.44
372567 ncm-dbt-05 581527 500 121 135 244 -9.73 ± 15.02 1 65 131 53 0 -18.08 ± 29.78
372566 ncm-dbt-02 589539 500 116 150 234 -23.66 ± 14.71 1 73 136 39 1 -47.55 ± 29.1
372565 ncm-dbt-01 585801 500 113 149 238 -25.06 ± 14.93 2 73 135 39 1 -48.96 ± 29.23
372564 ncm-dbt-04 566454 500 105 156 239 -35.56 ± 15.98 4 85 120 40 1 -67.55 ± 31.17
372563 ncm-dbt-03 586943 500 104 145 251 -28.55 ± 14.41 0 79 133 38 0 -57.5 ± 29.47
372562 ncm-dbt-05 583782 500 109 135 256 -18.08 ± 14.67 0 72 132 46 0 -36.26 ± 29.64
372561 ncm-dbt-02 585169 500 117 134 249 -11.82 ± 15.31 1 69 126 54 0 -22.27 ± 30.41
372560 ncm-dbt-03 587579 500 100 155 245 -38.37 ± 14.26 0 86 134 29 1 -79.17 ± 29.25
372559 ncm-dbt-01 586477 500 111 155 234 -30.65 ± 15.19 0 87 120 43 0 -61.79 ± 31.17
372558 ncm-dbt-04 564566 500 100 140 260 -27.86 ± 14.09 0 75 141 33 1 -57.5 ± 28.38
372557 ncm-dbt-02 585632 500 119 148 233 -20.17 ± 14.58 0 73 133 44 0 -40.48 ± 29.51
372556 ncm-dbt-05 584076 500 115 147 238 -22.27 ± 14.86 0 76 131 42 1 -46.13 ± 29.76
372555 ncm-dbt-03 587240 500 119 134 247 -10.42 ± 14.57 1 62 138 49 0 -19.48 ± 28.88
372554 ncm-dbt-01 583363 500 125 145 230 -13.9 ± 14.21 2 59 146 43 0 -25.06 ± 27.81
372553 ncm-dbt-04 564840 500 118 129 253 -7.64 ± 15.09 2 61 133 54 0 -12.51 ± 29.53
372552 ncm-dbt-02 589497 500 108 163 229 -38.37 ± 15.42 2 89 122 36 1 -76.25 ± 30.91
372551 ncm-dbt-03 589625 500 120 144 236 -16.69 ± 14.44 1 65 142 41 1 -33.46 ± 28.33
372550 ncm-dbt-05 582569 500 105 147 248 -29.25 ± 14.32 0 78 137 34 1 -60.36 ± 28.92
372549 ncm-dbt-01 585717 500 116 155 229 -27.16 ± 14.83 1 76 136 35 2 -56.07 ± 29.07
372548 ncm-dbt-04 567205 500 125 140 235 -10.43 ± 14.57 1 61 141 46 1 -20.87 ± 28.49
372547 ncm-dbt-02 590096 500 110 141 249 -21.57 ± 13.62 0 67 147 36 0 -43.3 ± 27.61
372546 ncm-dbt-01 585169 500 118 145 237 -18.78 ± 14.73 2 66 140 41 1 -36.26 ± 28.59
372545 ncm-dbt-03 588899 500 126 151 223 -17.38 ± 14.87 1 70 132 47 0 -33.46 ± 29.64
372544 ncm-dbt-05 584958 500 111 155 234 -30.65 ± 16.03 3 83 121 41 2 -60.36 ± 31.04
372543 ncm-dbt-04 567759 500 114 138 248 -16.69 ± 13.77 0 63 149 37 1 -34.86 ± 27.36
372542 ncm-dbt-03 588047 500 118 146 236 -19.48 ± 15.03 0 76 126 48 0 -39.08 ± 30.41
372541 ncm-dbt-02 587962 500 111 135 254 -16.69 ± 14.17 0 66 143 40 1 -34.86 ± 28.19
372540 ncm-dbt-01 585379 500 105 152 243 -32.76 ± 13.76 0 78 141 31 0 -66.1 ± 28.33
372539 ncm-dbt-05 584748 500 109 137 254 -19.48 ± 14.39 0 70 139 40 1 -40.48 ± 28.71
372538 ncm-dbt-04 567997 500 118 152 230 -23.66 ± 14.71 0 75 136 37 2 -50.38 ± 29.09

Commit

Commit ID 4d3950c6eb80c932af00f6495668d5c5adf3701b
Author Michael Chaly
Date 2022-02-05 06:40:21 UTC
Reintroduce razoring Razoring was simplified away some years ago, this patch reintroduces it in a slightly different form. Now for low depths if eval is far below alpha we check if qsearch can push it above alpha - and if it can't we return a fail low. passed STC https://tests.stockfishchess.org/tests/view/61fbf968d508ec6a1c9f3274 LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 226120 W: 61106 L: 60472 D: 104542 Ptnml(0-2): 1118, 25592, 59080, 26078, 1192 passed LTC https://tests.stockfishchess.org/tests/view/61fcc569d508ec6a1c9f5617 LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 113128 W: 30851 L: 30397 D: 51880 Ptnml(0-2): 114, 11483, 32926, 11917, 124 closes https://github.com/official-stockfish/Stockfish/pull/3921 bench 4684080
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