Mason, Robert
Current rating: 1483
Record: 5-6
| Grand Prix Philadelphia 2008 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 190 | Montaruli, Michael D (1518) | Lost 0-2 | -181482 |
| 3extended | 317 | Black, Daniel A (1501) | Won 2-1 | +191501 |
| 4extended | 217 | Kubis, Rusty (1516) | Won 2-1 | +181519 |
| 5extended | 96 | Mendonca, Justin (1512) | Lost 0-2 | -181501 |
| 6extended | 249 | Fleming, Joseph (1517) | Lost 1-2 | -181483 |
| average opponent: 1513record: 2-3 | new rating: 1483 | |||
| Grand Prix New Jersey 2004 (Mirrodin block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 239 | Dyer, Nate (1500) | Lost 0-2 | -181482 |
| 2block | 278 | Lynch, Sean T (1482) | Lost 0-2 | -181464 |
| 3block | 423 | Williams, Thomas (1463) | Won 2-0 | +181482 |
| 4block | 365 | Dowd, Matthew (1482) | Won 2-1 | +181500 |
| 5block | 256 | vasquez, juan f (1502) | Won 2-1 | +181518 |
| 6block | 249 | Pettinari, Eric (1522) | Lost 0-2 | -181500 |
| average opponent: 1492record: 3-3 | new rating: 1500 | |||