Dev Builds » 20230314-0722

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 06:59:40 584749 4004 1269 824 1911 +38.77 ± 5.2 0 273 1021 698 10 +76.71 ± 10.63
ncm-dbt-02 06:59:13 586262 3998 1233 822 1943 +35.84 ± 5.13 4 262 1058 669 6 +72.1 ± 10.41
ncm-dbt-03 06:59:14 584149 4000 1255 816 1929 +38.29 ± 5.16 9 245 1049 692 5 +78.25 ± 10.46
ncm-dbt-04 06:59:05 568641 3998 1243 833 1922 +35.76 ± 5.11 1 266 1063 660 9 +70.83 ± 10.38
ncm-dbt-05 06:59:29 576603 4000 1277 779 1944 +43.48 ± 5.16 3 245 1008 739 5 +88.0 ± 10.7
20000 6277 4074 9649 +38.43 ± 2.3 17 1291 5199 3458 35 +77.16 ± 4.7

Test Detail

ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN
429309 ncm-dbt-01 583908 4 1 0 3 +88.51 ± 137.63 0 0 1 1 0 +190.5 ± 634.21 ↓
429308 ncm-dbt-03 587494 500 155 99 246 +39.08 ± 13.76 0 27 141 81 1 +77.71 ± 28.25 ↓
429307 ncm-dbt-05 577028 500 156 101 243 +38.37 ± 14.13 0 31 133 86 0 +77.71 ± 29.4 ↓
429306 ncm-dbt-02 586858 498 147 114 237 +23.06 ± 14.58 2 36 138 73 0 +49.16 ± 28.8 ↓
429305 ncm-dbt-04 566849 498 151 101 246 +35.0 ± 15.26 1 38 120 90 0 +72.18 ± 31.17 ↓
429304 ncm-dbt-01 586562 500 169 98 233 +49.67 ± 14.38 0 27 126 96 1 +99.95 ± 30.29 ↓
429303 ncm-dbt-05 574419 500 158 95 247 +44.01 ± 14.33 1 26 133 89 1 +89.48 ± 29.33 ↓
429302 ncm-dbt-02 587452 500 149 110 241 +27.16 ± 14.44 1 36 136 77 0 +56.07 ± 29.07 ↓
429301 ncm-dbt-04 569549 500 161 107 232 +37.67 ± 14.22 0 31 135 83 1 +74.79 ± 29.13 ↓
429300 ncm-dbt-03 586520 500 165 110 225 +38.37 ± 13.99 2 24 141 83 0 +80.63 ± 28.22 ↓
429299 ncm-dbt-01 585506 500 156 108 236 +33.46 ± 14.86 0 39 124 87 0 +67.55 ± 30.65 ↓
429298 ncm-dbt-05 578259 500 157 95 248 +43.3 ± 14.69 0 33 122 95 0 +88.0 ± 30.9 ↓
429297 ncm-dbt-03 582110 500 159 106 235 +36.97 ± 15.33 2 33 127 86 2 +74.79 ± 30.24 ↓
429296 ncm-dbt-04 566928 500 160 104 236 +39.08 ± 15.58 0 38 122 86 4 +73.34 ± 30.91 ↓
429295 ncm-dbt-02 584832 500 163 107 230 +39.08 ± 14.44 0 31 134 83 2 +76.25 ± 29.26 ↓
429294 ncm-dbt-01 584285 500 167 84 249 +58.21 ± 14.39 0 23 123 102 2 +116.78 ± 30.65 ↓
429293 ncm-dbt-05 575232 500 164 88 248 +53.22 ± 14.95 0 28 121 98 3 +104.49 ± 31.0 ↓
429292 ncm-dbt-03 584159 500 152 98 250 +37.67 ± 15.13 0 38 121 90 1 +74.79 ± 31.04 ↓
429291 ncm-dbt-02 586520 500 150 86 264 +44.72 ± 14.64 0 32 122 96 0 +90.97 ± 30.89 ↓
429290 ncm-dbt-04 567561 500 155 120 225 +24.36 ± 13.0 0 30 155 65 0 +48.96 ± 26.43 ↓
429289 ncm-dbt-01 583908 500 168 124 208 +30.65 ± 15.19 0 39 132 75 4 +56.07 ± 29.61 ↓
429288 ncm-dbt-02 590438 500 152 101 247 +35.56 ± 14.74 0 36 128 85 1 +70.44 ± 30.11 ↓
429287 ncm-dbt-04 570749 500 156 106 238 +34.86 ± 14.44 0 35 130 85 0 +70.44 ± 29.84 ↓
429286 ncm-dbt-03 584159 500 160 105 235 +38.37 ± 13.86 1 26 140 83 0 +79.17 ± 28.38 ↓
429285 ncm-dbt-05 581111 500 146 96 258 +34.86 ± 14.83 0 38 124 88 0 +70.44 ± 30.65 ↓
429284 ncm-dbt-01 585885 500 153 120 227 +22.96 ± 14.27 0 39 140 70 1 +44.72 ± 28.57 ↓
429283 ncm-dbt-02 586308 500 152 103 245 +34.16 ± 14.26 0 33 136 80 1 +67.55 ± 29.02 ↓
429282 ncm-dbt-04 569589 500 157 90 253 +46.84 ± 15.27 0 33 120 94 3 +90.97 ± 31.17 ↓
429281 ncm-dbt-05 570909 500 164 108 228 +39.08 ± 14.96 1 34 123 92 0 +80.63 ± 30.77 ↓
429280 ncm-dbt-01 584243 500 155 96 249 +41.19 ± 15.21 0 37 118 94 1 +82.1 ± 31.44 ↓
429279 ncm-dbt-03 582152 500 155 102 243 +36.97 ± 15.33 2 35 121 92 0 +77.71 ± 31.04 ↓
429278 ncm-dbt-02 584706 500 167 95 238 +50.38 ± 14.0 1 21 134 93 1 +102.97 ± 29.07 ↓
429277 ncm-dbt-03 584034 500 160 101 239 +41.19 ± 14.57 1 29 131 88 1 +83.57 ± 29.65 ↓
429276 ncm-dbt-04 568116 500 153 116 231 +25.76 ± 13.81 0 34 146 69 1 +50.38 ± 27.71 ↓
429275 ncm-dbt-01 583824 500 160 86 254 +51.8 ± 14.35 0 26 125 98 1 +104.49 ± 30.42 ↓
429274 ncm-dbt-05 579331 500 162 95 243 +46.84 ± 13.95 0 25 134 90 1 +93.95 ± 29.15 ↓
429273 ncm-dbt-04 569789 500 150 89 261 +42.6 ± 13.84 0 27 135 88 0 +86.52 ± 29.06 ↓
429272 ncm-dbt-02 582987 500 153 106 241 +32.75 ± 14.69 0 37 130 82 1 +64.66 ± 29.86 ↓
429271 ncm-dbt-03 582569 500 149 95 256 +37.67 ± 14.74 1 33 127 89 0 +77.71 ± 30.23 ↓
429270 ncm-dbt-05 576537 500 170 101 229 +48.26 ± 14.96 1 30 118 101 0 +99.95 ± 31.44 ↓
429269 ncm-dbt-01 584622 500 140 108 252 +22.27 ± 14.6 0 43 132 75 0 +44.72 ± 29.63 ↓

Commit

Commit ID 78532af9dc585a81730d5d28763cc9d5273f96d1
Author Michael Chaly
Date 2023-03-14 07:22:40 UTC
Do more singular extensions This patch continues trend of last VLTC tuning - as measured by dubslow most of it gains was in lowering marging in calculation of singularBeta. This patch is a manual adjustment on top of it - it lowers multiplier of depth in calculation of singularBeta even further, from 2/3 to 1,5/2,5. Was negative at STC: https://tests.stockfishchess.org/tests/view/64089c632644b62c3393fc12 Elo: -2.49 +-1.7 (95%) LOS: 0.2% Total: 40000 W: 10601 L: 10888 D: 18511 Ptnml(0-2): 123, 4580, 10875, 4305, 117 nElo: -5.03 +-3.4 (95%) PairsRatio: 0.94 Passed 180+1.8 SPRT: https://tests.stockfishchess.org/tests/view/640096dae74a12625bcf3b33 LLR: 2.95 (-2.94,2.94) <0.00,2.00> Total: 160952 W: 43753 L: 43342 D: 73857 Ptnml(0-2): 25, 13984, 52039, 14411, 17 Passed 60+0.6 8 threads SPRT: https://tests.stockfishchess.org/tests/view/640dca8e65775d3b539cb7f6 LLR: 2.95 (-2.94,2.94) <0.50,2.50> Total: 38824 W: 10825 L: 10554 D: 17445 Ptnml(0-2): 0, 2939, 13268, 3200, 5 closes https://github.com/official-stockfish/Stockfish/pull/4443 bench 4776866
Copyright 2011–2025 Next Chess Move LLC
Feedback & Support Terms of Service Privacy Policy Desktop Version