Dev Builds » 20230422-0904

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 06:55:51 582945 4012 1283 800 1929 +42.03 ± 5.06 4 236 1040 725 1 +85.88 ± 10.51
ncm-dbt-02 06:56:09 584991 4000 1214 809 1977 +35.3 ± 5.13 2 272 1050 671 5 +70.8 ± 10.46
ncm-dbt-03 06:56:27 585756 4000 1296 782 1922 +44.89 ± 5.17 6 231 1012 745 6 +91.34 ± 10.67
ncm-dbt-04 06:55:39 571605 4000 1327 804 1869 +45.69 ± 5.23 2 251 974 768 5 +92.46 ± 10.9
ncm-dbt-05 06:56:10 584167 3988 1270 823 1895 +39.11 ± 5.11 5 241 1057 684 7 +78.86 ± 10.41
20000 6390 4018 9592 +41.4 ± 2.3 19 1231 5133 3593 24 +83.83 ± 4.73

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
409160 ncm-dbt-01 584243 12 5 3 4 +58.43 ± 110.55 0 1 2 3 0 +120.41 ± 334.55 ↓
409159 ncm-dbt-05 585084 488 159 104 225 +39.32 ± 14.87 1 30 127 85 1 +79.68 ± 30.16 ↓
409158 ncm-dbt-02 582318 500 162 110 228 +36.26 ± 14.66 0 34 132 82 2 +70.44 ± 29.57 ↓
409157 ncm-dbt-03 585928 500 154 94 252 +41.89 ± 15.12 1 33 122 93 1 +85.04 ± 30.9 ↓
409156 ncm-dbt-04 573123 500 165 94 241 +49.67 ± 14.38 0 28 123 99 0 +101.46 ± 30.72 ↓
409155 ncm-dbt-01 582193 500 159 107 234 +36.26 ± 14.13 0 32 134 84 0 +73.34 ± 29.28 ↓
409154 ncm-dbt-05 583154 500 154 97 249 +39.78 ± 14.08 1 25 142 80 2 +79.17 ± 28.09 ↓
409153 ncm-dbt-03 583572 500 178 96 226 +57.5 ± 13.94 0 21 127 101 1 +116.78 ± 30.03 ↓
409152 ncm-dbt-04 570348 500 181 107 212 +51.8 ± 15.52 0 34 110 104 2 +102.97 ± 32.56 ↓
409151 ncm-dbt-02 584537 500 161 100 239 +42.6 ± 14.78 0 32 127 89 2 +83.57 ± 30.21 ↓
409150 ncm-dbt-01 583447 500 146 104 250 +29.25 ± 14.19 0 36 136 78 0 +58.93 ± 29.06 ↓
409149 ncm-dbt-05 584201 500 170 105 225 +45.42 ± 13.87 1 23 136 90 0 +93.95 ± 28.85 ↓
409148 ncm-dbt-04 569749 500 169 102 229 +46.84 ± 13.95 0 25 134 90 1 +93.95 ± 29.15 ↓
409147 ncm-dbt-03 584076 500 170 90 240 +56.07 ± 15.09 2 25 114 109 0 +118.33 ± 32.0 ↓
409146 ncm-dbt-02 588643 500 142 93 265 +34.16 ± 14.65 0 37 127 86 0 +68.99 ± 30.25 ↓
409145 ncm-dbt-01 582652 500 163 99 238 +44.72 ± 14.51 0 30 127 92 1 +89.48 ± 30.19 ↓
409144 ncm-dbt-05 579413 500 159 106 235 +36.97 ± 14.44 0 32 135 81 2 +71.89 ± 29.14 ↓
409143 ncm-dbt-04 573527 500 159 95 246 +44.72 ± 15.15 0 36 114 100 0 +90.97 ± 31.99 ↓
409142 ncm-dbt-03 585843 500 158 103 239 +38.37 ± 14.53 1 31 130 88 0 +79.17 ± 29.81 ↓
409141 ncm-dbt-02 583321 500 146 96 258 +34.86 ± 14.7 0 36 129 84 1 +68.99 ± 29.98 ↓
409140 ncm-dbt-01 583447 500 144 95 261 +34.16 ± 14.65 2 31 133 84 0 +71.89 ± 29.42 ↓
409139 ncm-dbt-05 585295 500 161 107 232 +37.67 ± 15.25 0 40 116 94 0 +76.25 ± 31.7 ↓
409138 ncm-dbt-04 571592 500 154 106 240 +33.46 ± 14.99 2 34 128 86 0 +70.44 ± 30.11 ↓
409137 ncm-dbt-02 585169 500 153 107 240 +32.05 ± 13.98 0 33 138 79 0 +64.66 ± 28.76 ↓
409136 ncm-dbt-03 586350 500 148 97 255 +35.56 ± 15.74 2 36 124 85 3 +70.44 ± 30.65 ↓
409135 ncm-dbt-01 583154 500 166 98 236 +47.55 ± 14.4 2 23 130 95 0 +99.95 ± 29.7 ↓
409134 ncm-dbt-05 581652 500 156 90 254 +46.13 ± 14.72 1 28 126 94 1 +93.95 ± 30.32 ↓
409133 ncm-dbt-04 568077 500 162 101 237 +42.6 ± 14.91 0 34 122 93 1 +85.04 ± 30.9 ↓
409132 ncm-dbt-03 586689 500 170 96 234 +51.8 ± 14.75 0 29 119 101 1 +104.49 ± 31.29 ↓
409131 ncm-dbt-02 588047 500 142 100 258 +29.25 ± 13.92 0 34 140 76 0 +58.93 ± 28.51 ↓
409130 ncm-dbt-01 582611 500 167 97 236 +48.96 ± 13.79 0 24 132 94 0 +99.95 ± 29.4 ↓
409129 ncm-dbt-05 584874 500 164 107 229 +39.78 ± 14.35 1 29 132 88 0 +82.1 ± 29.52 ↓
409128 ncm-dbt-04 570829 500 170 108 222 +43.3 ± 15.2 0 37 114 99 0 +88.0 ± 31.98 ↓
409127 ncm-dbt-02 583447 500 160 107 233 +36.97 ± 14.17 1 29 136 84 0 +76.25 ± 28.98 ↓
409126 ncm-dbt-03 586054 500 159 108 233 +35.56 ± 13.53 0 28 143 79 0 +71.89 ± 28.0 ↓
409125 ncm-dbt-01 581569 500 163 102 235 +42.6 ± 14.12 0 29 131 90 0 +86.52 ± 29.64 ↓
409124 ncm-dbt-05 589668 500 147 107 246 +27.85 ± 13.96 0 34 143 72 1 +54.65 ± 28.11 ↓
409123 ncm-dbt-01 583196 500 170 95 235 +52.51 ± 14.79 0 30 115 105 0 +107.54 ± 31.86 ↓
409122 ncm-dbt-04 575598 500 167 91 242 +53.22 ± 14.01 0 23 129 97 1 +107.54 ± 29.8 ↓
409121 ncm-dbt-03 587537 500 159 98 243 +42.6 ± 13.98 0 28 133 89 0 +86.52 ± 29.35 ↓
409120 ncm-dbt-02 584453 500 148 96 256 +36.27 ± 15.17 1 37 121 91 0 +74.79 ± 31.04 ↓

Commit

Commit ID ba06c480a752458a8159db0c9110bd3b7e34145a
Author Stefan Geschwentner
Date 2023-04-22 09:04:09 UTC
Less reduction for tt move. This idea is a result of my second condition combination tuning for reductions: https://tests.stockfishchess.org/tests/view/643ed5573806eca398f06d61 There were used two parameters per combination: one for the 'sign' of the first and the second condition in a combination. Values >= 50 indicate using a condition directly and values <= -50 means use the negation of a condition. Each condition pair (X,Y) had two occurances dependent of the order of the two conditions: - if X < Y the parameters used for more reduction - if X > Y the parameters used for less reduction - if X = Y then only one condition is present and A[X][X][0]/A[X][X][1] stands for using more/less reduction for only this condition. The parameter pair A[7][2][0] (value = -94.70) and A[7][2][1] (value = 93.60) was one of the strongest signals with values near 100/-100. Here condition nr. 7 was '(ss+1)->cutoffCnt > 3' and condition nr. 2 'move == ttMove'. For condition nr. 7 the negation is used because A[7][2][0] is negative. This translates finally to less reduction (because 7 > 2) for tt moves if child cutoffs <= 3. STC: LLR: 2.94 (-2.94,2.94) <0.00,2.00> Total: 65728 W: 17704 L: 17358 D: 30666 Ptnml(0-2): 184, 7092, 18008, 7354, 226 https://tests.stockfishchess.org/tests/view/643ff767ef2529086a7ed042 LTC: LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 139200 W: 37776 L: 37282 D: 64142 Ptnml(0-2): 58, 13241, 42509, 13733, 59 https://tests.stockfishchess.org/tests/view/6440bfa9ef2529086a7edbc7 closes https://github.com/official-stockfish/Stockfish/pull/4538 Bench: 3548023
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