Thorson, Jim
Current rating: 1418
Record: 2-7-1
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1428 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 277 | Merz, Clayton (1449) | Lost 0-2 | -181410 |
| 2sealed | 542 | Creasman, Jason (1482) | Won 2-1 | +201430 |
| 3sealed | 300 | Potter, Michael (1545) | Won 2-1 | +201450 |
| 4sealed | 174 | Gurevich, Misha (1706) | Lost 1-2 | -141436 |
| 5sealed | 450 | Hawtrey, John (1437) | Lost 1-2 | -181418 |
| average opponent: 1524record: 2-3 | new rating: 1418 | |||
| Grand Prix Columbus 2010 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 35 | Mueller, Anthony (1439) | Draw 1-1 | -11499 |
| 3legacy | 97 | Soucy, Matt G (1552) | Lost 0-2 | -171482 |
| 4legacy | 203 | Moore, Andy (1464) | Lost 1-2 | -181464 |
| 5legacy | 232 | Walsh, Sean L (1471) | Lost 1-2 | -181446 |
| 6legacy | 212 | DeFazio, Mike (1465) | Lost 1-2 | -181428 |
| average opponent: 1478record: 0-4-1 | new rating: 1428 | |||