Costello, Ron a
Current rating: 1499
Record: 3-3
| Grand Prix Denver 2008 (Lorwyn block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 186 | Bretz, Aaron (1500) | Lost 0-2 | -181482 |
| 2block | 250 | ladd, danny (1482) | Won 2-0 | +181500 |
| 3block | 207 | Romero, Julian (1500) | Won 2-1 | +181518 |
| 4block | 148 | Miller, Adam g (1506) | Won 2-0 | +181536 |
| 5block | 110 | Gunzner, Aaron (1521) | Lost 1-2 | -181518 |
| 6block | 157 | Perez, Martin (1504) | Lost 0-2 | -191499 |
| average opponent: 1502record: 3-3 | new rating: 1499 | |||