Sieminski, Jeffrey
Current rating: 1482
Record: 2-3
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 238 | Brown, Derek M (1500) | Lost 0-2 | -181482 |
| 2sealed | 536 | Daugherty, Andrew (1483) | Won 2-1 | +181500 |
| 3sealed | 268 | Flones, Jason E (1499) | Lost 1-2 | -181482 |
| 4sealed | 415 | Ralph, Nicholas (1482) | Won 2-1 | +181500 |
| 5sealed | 308 | Cross, Matthew P (1504) | Lost 0-2 | -181482 |
| average opponent: 1493record: 2-3 | new rating: 1482 | |||