Zimpelman, Robert W
Current rating: 1443
Record: 2-6
| Grand Prix Nashville 2010 (SOM limited) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 432 | Ross, Tom (1759) | Lost 0-2 | -131433 |
| 5sealed | 518 | Castor, Kenny (1760) | Won 2-1 | +241457 |
| 6sealed | 438 | Gilliland, Dustin (1508) | Lost 0-2 | -171440 |
| 7sealed | 473 | Throop, Jake (1542) | Won 2-0 | +201460 |
| 8sealed | 506 | Chau, Phuong (1519) | Lost 0-2 | -171443 |
| average opponent: 1617record: 2-3 | new rating: 1443 | |||
| Grand Prix Atlanta 2008 (ALA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 11 | Pratser, Matthew (1483) | Lost 1-2 | -181482 |
| 2sealed | 236 | Worley, Matthew (1482) | Lost 0-2 | -181464 |
| 3sealed | 281 | Mcelyea, Jonathan (1464) | Lost 0-2 | -181446 |
| average opponent: 1476record: 0-3 | new rating: 1446 | |||