Cournoyer, Simon
Current rating: 1518
Record: 5-4
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 144 | Feeley, Sam (1485) | Won 2-1 | +181518 |
| 2sealed | 43 | Sosna, Ryan (1518) | Lost 0-2 | -181500 |
| 3sealed | 152 | Jannen, Bill (1584) | Lost 0-2 | -171483 |
| 4sealed | 160 | Baron, Pete (1397) | Won 2-0 | +171500 |
| 5sealed | 252 | Mason, Benjamin (1502) | Won 2-0 | +181518 |
| 6sealed | 143 | Sadin, Steven (1549) | Won 2-0 | +181536 |
| 7sealed | 85 | Lippitt, Ethan (1520) | Won 2-1 | +181554 |
| 8sealed | 45 | Nordlund, Zachary S (1555) | Lost 1-2 | -181536 |
| 9sealed | 78 | Sharkey, Andrew (1543) | Lost 0-2 | -181518 |
| average opponent: 1517record: 5-4 | new rating: 1518 | |||