Kurpaska, John
Current rating: 1500
Record: 4-4-1
| Grand Prix Columbus 2010 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 23 | Peck, Donnie (1525) | Lost 1-2 | -181482 |
| 2legacy | 206 | Sapp, Joshua (1482) | Won 2-0 | +181500 |
| 3legacy | 124 | Drake, Matthew C (1468) | Draw 1-1 | 01500 |
| 4legacy | 206 | Leith, Kyle (1464) | Lost 0-1 | -191481 |
| 5legacy | 233 | Winser, Michael (1483) | Won 2-1 | +181499 |
| 6legacy | 181 | O'Neal, Paul (1508) | Won 2-1 | +181517 |
| 7legacy | 135 | Fort, Walter (1519) | Won 2-0 | +181535 |
| 8legacy | 94 | Azzano, Douglas (1577) | Lost 1-2 | -171518 |
| 9legacy | 82 | Bower, Seth (1509) | Lost 0-2 | -181500 |
| average opponent: 1504record: 4-4-1 | new rating: 1500 | |||