Spreadborough, Dean G
Current rating: 1517
Record: 4-3
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 428 | Ling, Justin A (1421) | Won 2-0 | +171517 |
| 2sealed | 304 | Williams, Benjamin (1518) | Lost 0-2 | -181499 |
| 3sealed | 272 | Weyand, Kyle H (1500) | Won 2-1 | +181517 |
| 4sealed | 263 | Early, Nathan (1518) | Won 2-0 | +181535 |
| 5sealed | 229 | Yi, Travis C (1535) | Won 2-0 | +181553 |
| 6sealed | 117 | Williams, Erik (1566) | Lost 1-2 | -181535 |
| 7sealed | 201 | Heustis, Nathan p (1538) | Lost 1-2 | -181517 |
| average opponent: 1514record: 4-3 | new rating: 1517 | |||