Mackey, Sam
Current rating: 1518
Record: 3-2
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 252 | Callahan, Kimberly (1500) | Won 2-0 | +181518 |
| 2sealed | 204 | McDonald, Brendan J (1518) | Won 2-0 | +181536 |
| 3sealed | 32 | Wu, Alvan (1535) | Lost 0-2 | -181518 |
| 4sealed | 250 | Lee, Benjamin (1524) | Won 2-1 | +181536 |
| 5sealed | 186 | Patton, James (1535) | Lost 0-2 | -181518 |
| average opponent: 1522record: 3-2 | new rating: 1518 | |||