Cook, Casey
Current rating: 1428
Record: 1-5
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 478 | Thomson, Brandon (1500) | Won 2-1 | +181518 |
| 2sealed | 148 | Mulvaney, Paul P (1520) | Lost 1-2 | -181500 |
| 3sealed | 450 | Ponce, Joseph K (1500) | Lost 0-2 | -181482 |
| 4sealed | 416 | Hanowell, Shane (1482) | Lost 0-2 | -181464 |
| 5sealed | 478 | Winfree, Charles P (1464) | Lost 1-2 | -181446 |
| 6sealed | 394 | Scherzinger, Eric (1450) | Lost 0-2 | -181428 |
| average opponent: 1486record: 1-5 | new rating: 1428 | |||