Foster, Sean n
Current rating: 1520
Record: 5-4
| Grand Prix Seattle 2009 (ARB standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 304 | Charvat, Jason (1500) | Won 2-0 | +181518 |
| 2standard | 154 | Lapointe, Marc A (1510) | Lost 1-2 | -181500 |
| 3standard | 408 | Black, Jason (1474) | Won 2-1 | +171517 |
| 4standard | 331 | Keeth, Christian (1497) | Lost 0-2 | -181499 |
| 5standard | 382 | Washburn, Shule (1500) | Won 2-1 | +181517 |
| 6standard | 277 | Wicker, Shane (1517) | Won 2-1 | +181535 |
| 7standard | 126 | Milner, John M (1560) | Won 2-1 | +181553 |
| 8standard | 105 | Martell, Tom (1707) | Lost 1-2 | -151538 |
| 9standard | 135 | Demery, Joshua (1520) | Lost 0-0 | -181520 |
| average opponent: 1532record: 5-4 | new rating: 1520 | |||