Sontum, Matt
Current rating: 1568
Record: 8-5
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 200 | Riley, Erin (1563) | Won 2-1 | +191519 |
| 3sealed | 122 | Coggins, Jake (1536) | Lost 1-2 | -181501 |
| 4sealed | 166 | Mathews, Keith (1550) | Lost 0-2 | -171484 |
| 5sealed | 219 | Walauski, Travis (1504) | Won 2-0 | +191503 |
| 6sealed | 193 | Rietzl, Paul (2018) | Won 2-1 | +261529 |
| 7sealed | 96 | Budnick, Christopher (1503) | Won 2-1 | +181547 |
| 8sealed | 91 | Tietze, Maxwell (1665) | Won 2-1 | +201567 |
| 9sealed | 69 | Klein, Elizabeth A (1572) | Won 2-0 | +181585 |
| 10draft | 14 | Pskowski, Timothy (1578) | Lost 1-2 | -181567 |
| 12draft | 40 | Beloin, Dave J (1592) | Won 2-0 | +181585 |
| 13draft | 22 | Thomas, Kevin (1598) | Lost 1-2 | -171568 |
| 14draft | 18 | Zarmakupis, Adam J (1593) | Won 2-1 | +181586 |
| 15draft | 31 | Briscoe, Kenneth (1593) | Lost 0-2 | -181568 |
| average opponent: 1605record: 8-5 | new rating: 1568 | |||