Calkins, Mark
Current rating: 1501
Record: 3-3-1
| Grand Prix Philadelphia 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 49 | Mabry, Andrew (1500) | Won 0-0 | +181518 |
| 2extended | 28 | McDonough, Anthony (1500) | Won 0-0 | +181536 |
| 3extended | 17 | Van Cleave, Trey (1673) | Draw 0-0 | +21538 |
| 4extended | 64 | Joyce, Brian (1520) | Lost 0-0 | -181520 |
| 5extended | 118 | Lesher, Jeremy (1518) | Won 0-0 | +181538 |
| 6extended | 74 | Fertik, Elliot (1536) | Lost 0-0 | -181520 |
| 7extended | 99 | Carroll, Mark (1484) | Lost 0-0 | -191501 |
| average opponent: 1533record: 3-3-1 | new rating: 1501 | |||