Dev Builds » 20220207-1630

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 06:56:49 583678 4006 916 1178 1912 -22.76 ± 5.15 8 574 1098 318 5 -45.18 ± 10.21
ncm-dbt-02 06:56:18 586178 4002 927 1172 1903 -21.3 ± 5.16 7 568 1093 329 4 -42.23 ± 10.24
ncm-dbt-03 06:56:25 585174 4000 908 1137 1955 -19.91 ± 5.25 2 589 1050 354 5 -40.48 ± 10.49
ncm-dbt-04 06:55:58 567696 4000 937 1127 1936 -16.52 ± 5.1 5 532 1114 346 3 -32.76 ± 10.13
ncm-dbt-05 06:57:45 581182 3992 937 1148 1907 -18.38 ± 5.29 8 566 1055 363 4 -36.16 ± 10.46
20000 4625 5762 9613 -19.77 ± 2.32 30 2829 5410 1710 21 -39.36 ± 4.61

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
433329 ncm-dbt-02 586435 2 1 1 0 0.0 ± 34.02 0 0 1 0 0 0.0 ± 30.47 ↓
433328 ncm-dbt-01 584874 6 1 2 3 -58.33 ± 98.71 0 1 2 0 0 -120.24 ± 264.77 ↓
433327 ncm-dbt-03 584790 500 123 136 241 -9.04 ± 15.57 0 70 125 53 2 -20.87 ± 30.53 ↓
433326 ncm-dbt-05 579578 492 119 147 226 -19.79 ± 15.15 1 72 127 46 0 -38.29 ± 30.26 ↓
433325 ncm-dbt-02 584874 500 116 140 244 -16.69 ± 14.04 1 63 145 41 0 -32.05 ± 27.93 ↓
433324 ncm-dbt-04 566730 500 108 127 265 -13.21 ± 13.62 0 60 149 41 0 -26.46 ± 27.39 ↓
433323 ncm-dbt-01 584117 500 130 148 222 -12.51 ± 15.6 3 65 130 51 1 -22.27 ± 29.91 ↓
433322 ncm-dbt-03 585632 500 104 137 259 -22.96 ± 15.03 0 79 125 46 0 -46.13 ± 30.53 ↓
433321 ncm-dbt-05 578095 500 118 144 238 -18.08 ± 14.8 1 70 133 46 0 -34.86 ± 29.51 ↓
433320 ncm-dbt-02 587197 500 116 162 222 -32.05 ± 13.57 0 76 144 30 0 -64.66 ± 27.91 ↓
433319 ncm-dbt-01 582987 500 126 154 220 -19.48 ± 14.52 1 68 140 40 1 -39.08 ± 28.58 ↓
433318 ncm-dbt-04 567561 500 108 134 258 -18.08 ± 14.93 1 71 131 47 0 -34.86 ± 29.77 ↓
433317 ncm-dbt-03 584285 500 114 134 252 -13.9 ± 15.22 0 73 124 53 0 -27.85 ± 30.66 ↓
433316 ncm-dbt-05 582861 500 113 140 247 -18.78 ± 15.1 2 69 134 44 1 -36.26 ± 29.38 ↓
433315 ncm-dbt-02 586181 500 111 148 241 -25.76 ± 14.34 0 76 135 39 0 -51.8 ± 29.22 ↓
433314 ncm-dbt-01 584369 500 110 137 253 -18.78 ± 14.73 0 72 134 43 1 -39.08 ± 29.38 ↓
433313 ncm-dbt-04 566099 500 122 152 226 -20.87 ± 15.01 1 74 129 46 0 -40.48 ± 30.02 ↓
433312 ncm-dbt-03 586223 500 111 140 249 -20.17 ± 13.51 0 65 149 36 0 -40.48 ± 27.34 ↓
433311 ncm-dbt-05 581485 500 106 149 245 -29.95 ± 15.26 1 84 122 43 0 -58.93 ± 30.91 ↓
433310 ncm-dbt-01 581735 500 105 147 248 -29.25 ± 14.84 2 77 132 39 0 -56.07 ± 29.61 ↓
433309 ncm-dbt-02 585970 500 114 143 243 -20.18 ± 14.19 0 69 142 38 1 -41.89 ± 28.3 ↓
433308 ncm-dbt-04 568593 500 128 137 235 -6.25 ± 14.34 0 60 139 51 0 -12.51 ± 28.76 ↓
433307 ncm-dbt-05 581818 500 112 135 253 -15.99 ± 15.26 1 72 126 51 0 -30.65 ± 30.41 ↓
433306 ncm-dbt-03 584411 500 100 156 244 -39.08 ± 14.83 2 86 128 34 0 -76.25 ± 30.1 ↓
433305 ncm-dbt-02 586012 500 111 137 252 -18.08 ± 14.42 0 70 136 44 0 -36.26 ± 29.12 ↓
433304 ncm-dbt-04 567878 500 127 140 233 -9.04 ± 14.83 1 61 140 46 2 -19.48 ± 28.62 ↓
433303 ncm-dbt-01 585970 500 113 154 233 -28.55 ± 14.54 0 80 131 39 0 -57.5 ± 29.74 ↓
433302 ncm-dbt-05 580862 500 123 149 228 -18.08 ± 14.67 1 67 141 39 2 -37.67 ± 28.45 ↓
433301 ncm-dbt-02 586477 500 127 147 226 -13.9 ± 14.98 3 61 140 45 1 -25.06 ± 28.61 ↓
433300 ncm-dbt-03 584243 500 119 137 244 -12.51 ± 15.24 0 69 133 45 3 -29.25 ± 29.52 ↓
433299 ncm-dbt-04 570549 500 111 154 235 -29.95 ± 14.5 1 78 134 37 0 -58.93 ± 29.33 ↓
433298 ncm-dbt-01 584790 500 114 144 242 -20.87 ± 14.5 2 66 143 38 1 -40.48 ± 28.17 ↓
433297 ncm-dbt-02 588004 500 120 155 225 -24.36 ± 15.13 1 78 126 45 0 -47.55 ± 30.4 ↓
433296 ncm-dbt-03 585674 500 121 149 230 -19.48 ± 14.13 0 69 140 41 0 -39.08 ± 28.58 ↓
433295 ncm-dbt-05 583112 500 124 133 243 -6.26 ± 14.6 0 61 138 50 1 -13.9 ± 28.89 ↓
433294 ncm-dbt-04 570148 500 119 129 252 -6.95 ± 13.74 1 53 151 45 0 -12.51 ± 27.15 ↓
433293 ncm-dbt-01 583489 500 106 143 251 -25.76 ± 14.08 0 74 139 37 0 -51.8 ± 28.68 ↓
433292 ncm-dbt-02 584453 500 111 139 250 -19.48 ± 15.88 2 75 124 47 2 -39.08 ± 30.66 ↓
433291 ncm-dbt-03 586139 500 116 148 236 -22.27 ± 14.98 0 78 126 46 0 -44.72 ± 30.4 ↓
433290 ncm-dbt-01 580779 500 111 149 240 -26.46 ± 13.72 0 71 147 31 1 -54.65 ± 27.55 ↓
433289 ncm-dbt-05 581652 500 122 151 227 -20.17 ± 14.7 1 71 134 44 0 -39.08 ± 29.38 ↓
433288 ncm-dbt-04 564017 500 114 154 232 -27.86 ± 14.09 0 75 141 33 1 -57.5 ± 28.38 ↓

Commit

Commit ID 08ac4e9db5d763edb788f3b01ea5c3bac494defa
Author Michael Chaly
Date 2022-02-07 16:30:35 UTC
Do less depth reduction in null move pruning for complex positions This patch makes us reduce less depth in null move pruning if complexity is high enough. Thus, null move pruning now depends in two distinct ways on complexity, while being the only search heuristic that exploits complexity so far. passed STC https://tests.stockfishchess.org/tests/view/61fde60fd508ec6a1c9f7754 LLR: 2.94 (-2.94,2.94) <0.00,2.50> Total: 170000 W: 45555 L: 45027 D: 79418 Ptnml(0-2): 760, 19352, 44359, 19658, 871 passed LTC https://tests.stockfishchess.org/tests/view/61fe91febf46cb834cbd5c90 LLR: 2.96 (-2.94,2.94) <0.50,3.00> Total: 145272 W: 39182 L: 38651 D: 67439 Ptnml(0-2): 127, 14864, 42157, 15327, 161 closes https://github.com/official-stockfish/Stockfish/pull/3923 bench 4461945
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