Coffman, Ray
Current rating: 1517
Record: 5-4
| Grand Prix Detroit 2013 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 240 | McCauley, Devin (1500) | Won 2-1 | +181518 |
| 2modern | 69 | Dobbins, Stephen (1617) | Won 0-0 | +201538 |
| 3modern | 239 | Fulton, Randall (1436) | Won 2-1 | +161554 |
| 4modern | 46 | Emms, Brandon (1518) | Lost 0-2 | -191535 |
| 5modern | 301 | Deffenbaugh, Zachary (1537) | Lost 1-2 | -181517 |
| 6modern | 298 | Timmons, Stephen (1516) | Lost 0-2 | -181499 |
| 7modern | 414 | Curran, Trevor (1471) | Won 0-0 | +181517 |
| 8modern | 245 | Ketterman, Dan (1519) | Lost 0-2 | -181499 |
| 9modern | 248 | Procacci, Sergio (1516) | Won 2-0 | +181517 |
| average opponent: 1514record: 5-4 | new rating: 1517 | |||