Sommer, Jason
Current rating: 1481
Record: 3-4
| Grand Prix Anaheim 2003 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 48 | Meissner, Erik (1500) | Lost 0-2 | -181482 |
| 2extended | 68 | Beck, Rick (1464) | Won 2-1 | +181500 |
| 3extended | 63 | Kashefinejad, Farish (1501) | Won 1-0 | +181518 |
| 4extended | 81 | Cron, Andrew (1519) | Won 2-1 | +181536 |
| 5extended | 60 | Hanson, Daniel (1509) | Lost 0-2 | -191517 |
| 6extended | 66 | Mardis, Robert (1519) | Lost 0-2 | -181499 |
| 7extended | 74 | Yeh, Jon (1501) | Lost 0-2 | -181481 |
| average opponent: 1502record: 3-4 | new rating: 1481 | |||