Grammes, Billy
Current rating: 1446
Record: 1-4
| Grand Prix Pittsburgh 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 231 | Wilson, Richard (1500) | Won 2-1 | +181518 |
| 2sealed | 300 | Smelley, Robert (1518) | Lost 0-2 | -181500 |
| 3sealed | 297 | Spencer, Jeffrey (1500) | Lost 1-2 | -181482 |
| 4sealed | 640 | Kenjar, Jason (1453) | Lost 0-2 | -191463 |
| 5sealed | 580 | Dean, Charles (1465) | Lost 0-2 | -171446 |
| average opponent: 1487record: 1-4 | new rating: 1446 | |||