Dev Builds » 20220417-1938

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 06:56:03 582376 4008 1048 1044 1916 +0.35 ± 4.99 1 425 1149 427 2 +0.52 ± 9.94
ncm-dbt-02 06:54:32 585550 4000 1019 1013 1968 +0.52 ± 5.08 6 422 1134 436 2 +1.74 ± 10.02
ncm-dbt-03 06:54:24 584624 4000 1028 1015 1957 +1.13 ± 5.02 4 416 1143 437 0 +2.95 ± 9.97
ncm-dbt-04 06:55:37 568657 4000 1006 1024 1970 -1.56 ± 4.99 2 432 1148 418 0 -2.78 ± 9.94
ncm-dbt-05 06:55:15 581375 3992 1005 999 1988 +0.52 ± 5.09 3 430 1125 434 4 +0.87 ± 10.07
20000 5106 5095 9799 +0.19 ± 2.25 16 2125 5699 2152 8 +0.66 ± 4.47

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
416157 ncm-dbt-01 582611 8 2 3 3 -43.58 ± 76.58 0 1 3 0 0 -88.62 ± 172.94 ↓
416156 ncm-dbt-05 578547 492 123 136 233 -9.18 ± 15.07 1 63 130 52 0 -16.96 ± 29.88 ↓
416155 ncm-dbt-04 567997 500 143 137 220 +4.17 ± 14.41 0 53 138 59 0 +8.34 ± 28.89 ↓
416154 ncm-dbt-03 585548 500 129 128 243 +0.69 ± 14.36 0 55 139 56 0 +1.39 ± 28.76 ↓
416153 ncm-dbt-02 581028 500 125 132 243 -4.86 ± 14.48 1 56 143 49 1 -9.73 ± 28.23 ↓
416152 ncm-dbt-01 581860 500 127 136 237 -6.25 ± 14.08 0 58 143 49 0 -12.51 ± 28.23 ↓
416151 ncm-dbt-05 579496 500 127 123 250 +2.78 ± 14.42 0 54 138 58 0 +5.56 ± 28.89 ↓
416150 ncm-dbt-03 582652 500 137 118 245 +13.21 ± 13.62 0 41 149 60 0 +26.46 ± 27.39 ↓
416149 ncm-dbt-01 581485 500 126 121 253 +3.48 ± 13.41 1 43 156 50 0 +8.34 ± 26.45 ↓
416148 ncm-dbt-04 568156 500 125 130 245 -3.47 ± 13.69 0 53 149 48 0 -6.95 ± 27.43 ↓
416147 ncm-dbt-02 587962 500 118 113 269 +3.47 ± 14.61 0 55 135 60 0 +6.95 ± 29.28 ↓
416146 ncm-dbt-05 583489 500 129 114 257 +10.43 ± 14.05 0 46 143 61 0 +20.87 ± 28.22 ↓
416145 ncm-dbt-01 581194 500 130 126 244 +2.78 ± 14.03 0 51 144 55 0 +5.56 ± 28.1 ↓
416144 ncm-dbt-03 586266 500 121 107 272 +9.73 ± 14.51 0 50 136 64 0 +19.48 ± 29.14 ↓
416143 ncm-dbt-04 569151 500 129 132 239 -2.08 ± 14.36 0 57 139 54 0 -4.17 ± 28.76 ↓
416142 ncm-dbt-02 587452 500 130 133 237 -2.08 ± 13.83 1 50 150 49 0 -2.78 ± 27.29 ↓
416141 ncm-dbt-05 580240 500 121 139 240 -12.51 ± 13.42 0 57 155 37 1 -26.46 ± 26.55 ↓
416140 ncm-dbt-01 582027 500 140 138 222 +1.39 ± 13.76 0 50 148 52 0 +2.78 ± 27.57 ↓
416139 ncm-dbt-03 586604 500 123 125 252 -1.39 ± 13.9 0 53 146 51 0 -2.78 ± 27.84 ↓
416138 ncm-dbt-04 571110 500 103 118 279 -10.42 ± 14.05 1 58 146 45 0 -19.48 ± 27.82 ↓
416137 ncm-dbt-02 587155 500 125 120 255 +3.48 ± 14.74 1 53 136 60 0 +8.34 ± 29.15 ↓
416136 ncm-dbt-05 579744 500 126 129 245 -2.09 ± 14.86 0 59 137 52 2 -6.95 ± 29.02 ↓
416135 ncm-dbt-03 583908 500 144 129 227 +10.43 ± 13.37 0 41 153 56 0 +20.87 ± 26.85 ↓
416134 ncm-dbt-04 566572 500 123 126 251 -2.08 ± 13.69 0 52 149 49 0 -4.17 ± 27.43 ↓
416133 ncm-dbt-01 583614 500 113 130 257 -11.82 ± 14.43 0 65 137 48 0 -23.66 ± 29.01 ↓
416132 ncm-dbt-02 585506 500 131 118 251 +9.04 ± 14.19 1 45 144 60 0 +19.48 ± 28.09 ↓
416131 ncm-dbt-05 580406 500 130 120 250 +6.95 ± 14.27 0 49 143 57 1 +12.51 ± 28.23 ↓
416130 ncm-dbt-03 582819 500 128 134 238 -4.17 ± 14.15 1 54 145 50 0 -6.95 ± 27.97 ↓
416129 ncm-dbt-04 568474 500 126 133 241 -4.86 ± 14.73 1 59 136 54 0 -8.34 ± 29.15 ↓
416128 ncm-dbt-01 585379 500 137 125 238 +8.34 ± 14.26 0 48 143 58 1 +15.3 ± 28.23 ↓
416127 ncm-dbt-02 583950 500 130 124 246 +4.17 ± 14.15 0 51 142 57 0 +8.34 ± 28.37 ↓
416126 ncm-dbt-05 583405 500 126 119 255 +4.87 ± 14.22 1 48 144 57 0 +11.12 ± 28.1 ↓
416125 ncm-dbt-03 584076 500 116 139 245 -15.99 ± 14.76 1 68 134 47 0 -30.65 ± 29.39 ↓
416124 ncm-dbt-01 581569 500 139 138 223 +0.69 ± 14.23 0 54 141 55 0 +1.39 ± 28.5 ↓
416123 ncm-dbt-04 566651 500 118 114 268 +2.78 ± 13.49 0 47 152 51 0 +5.56 ± 27.02 ↓
416122 ncm-dbt-02 586943 500 122 130 248 -5.56 ± 14.54 1 58 139 52 0 -9.73 ± 28.76 ↓
416121 ncm-dbt-05 585674 500 123 119 258 +2.78 ± 14.8 1 54 135 60 0 +6.95 ± 29.28 ↓
416120 ncm-dbt-03 585126 500 130 135 235 -3.47 ± 14.61 2 54 141 53 0 -4.17 ± 28.5 ↓
416119 ncm-dbt-02 584411 500 138 143 219 -3.47 ± 14.35 1 54 145 49 1 -6.95 ± 27.97 ↓
416118 ncm-dbt-01 581652 500 134 127 239 +4.86 ± 14.86 0 55 134 60 1 +8.34 ± 29.41 ↓
416117 ncm-dbt-04 571150 500 139 134 227 +3.47 ± 14.35 0 53 139 58 0 +6.95 ± 28.76 ↓

Commit

Commit ID df2f7e75276cc93a8cb8c70057903ab0edbd92bd
Author KJE-98
Date 2022-04-17 19:38:05 UTC
Decrease LMR at PV nodes with low depth. This patch lessens the Late Move Reduction at PV nodes with low depth. Previously the affect of depth on LMR was independant of nodeType. The idea behind this patch is that at PV nodes, LMR at low depth is will miss out on potential alpha-raising moves. Passed STC: https://tests.stockfishchess.org/tests/view/625aa867d3367522c4b8965c LLR: 2.93 (-2.94,2.94) <0.00,2.50> Total: 19360 W: 5252 L: 5006 D: 9102 Ptnml(0-2): 79, 2113, 5069, 2321, 98 Passed LTC: https://tests.stockfishchess.org/tests/view/625ae844d3367522c4b8a009 LLR: 2.94 (-2.94,2.94) <0.50,3.00> Total: 39264 W: 10636 L: 10357 D: 18271 Ptnml(0-2): 18, 3928, 11473, 4183, 30 closes https://github.com/official-stockfish/Stockfish/pull/3985 bench: 8129754
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