Tewksbury, Jason A
Current rating: 1503
Record: 3-3
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 97 | Beg, Hollie (1500) | Lost 0-2 | -181482 |
| 2sealed | 549 | Kennedy, Randy (1482) | Won 2-0 | +181500 |
| 3sealed | 484 | Jones, Adam (1500) | Won 2-0 | +181518 |
| 4sealed | 266 | Silcox, Brad (1516) | Lost 0-2 | -181500 |
| 5sealed | 346 | Bandy, Jason L (1550) | Won 2-1 | +191519 |
| 6sealed | 344 | Jefferson, Kyle (1623) | Lost 0-2 | -161503 |
| average opponent: 1529record: 3-3 | new rating: 1503 | |||