Vallies, Matt
Current rating: 1516
Record: 4-3
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 41 | Siliekus, Michael (1380) | Won 2-0 | +161516 |
| 2sealed | 33 | Quon, Daniel (1482) | Won 2-0 | +171533 |
| 3sealed | 33 | Swartz, Ben (1578) | Lost 0-2 | -171516 |
| 4sealed | 109 | Bower, Seth (1519) | Won 2-0 | +181534 |
| 5sealed | 100 | Costello, James (1529) | Lost 1-2 | -181516 |
| 6sealed | 157 | Paschover, Marc (1533) | Lost 0-2 | -181498 |
| 7sealed | 155 | Yoder, Scott (1498) | Won 2-0 | +181516 |
| average opponent: 1503record: 4-3 | new rating: 1516 | |||