Parker, Jefferson
Current rating: 1524
Record: 5-4
| Grand Prix Atlanta 2003 (8ED standard) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 101 | Walker, Ben [USA] (1464) | Won 2-0 | +171534 |
| 2standard | 118 | Weil, Stephen (1518) | Won 2-0 | +181552 |
| 3standard | 88 | Willoughby, Tom (1767) | Lost 1-2 | -141538 |
| 4standard | 134 | Hegstad, Brian (1763) | Lost 1-2 | -141524 |
| average opponent: 1628record: 2-2 | new rating: 1524 | |||
| Grand Prix Atlanta 2001 (ODY limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 47 | Sotter, Paul (1500) | Won 2-0 | +181518 |
| 2sealed | 47 | Calcagni, Jason (1518) | Won 2-1 | +181536 |
| 3sealed | 47 | Anderson, Brett (1520) | Lost 0-2 | -181518 |
| 4sealed | 71 | Roderick, Tim (1517) | Won 2-1 | +181536 |
| 5sealed | 48 | Edwards, Bart (1522) | Lost 0-2 | -191517 |
| average opponent: 1516record: 3-2 | new rating: 1517 | |||