Dewiel, Mark A
Current rating: 1501
Record: 3-3
| Grand Prix Columbus 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 23 | Madsen, William (1567) | Lost 0-2 | -171483 |
| 2modern | 320 | Clawson, Brent (1447) | Lost 1-2 | -181465 |
| 3modern | 446 | Clark, TJ (1465) | Won 2-0 | +181483 |
| 4modern | 431 | Nelson, Robby (1481) | Won 2-0 | +181501 |
| 5modern | 389 | Elick, Jared (1504) | Won 1-0 | +181519 |
| 6modern | 265 | Kohorst, Erich (1518) | Lost 1-2 | -181501 |
| average opponent: 1497record: 3-3 | new rating: 1501 | |||