Peterson, Joe M
Current rating: 1519
Record: 4-3
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 87 | Nordlund, Zachary S (1500) | Lost 1-2 | -181482 |
| 2sealed | 267 | Berry, Tyler (1482) | Won 2-1 | +181500 |
| 3sealed | 265 | Marlowe, Will S (1501) | Won 2-0 | +181518 |
| 4sealed | 125 | Burris, Josh (1590) | Lost 0-2 | -171501 |
| 5sealed | 204 | Chapman, Ryan (1505) | Won 2-1 | +181519 |
| 6sealed | 148 | Katz, Billy (1516) | Won 2-1 | +181537 |
| 7sealed | 125 | Giaquinto, Frank (1517) | Lost 0-2 | -181519 |
| average opponent: 1516record: 4-3 | new rating: 1519 | |||