O'Brien, Chad M
Current rating: 1540
Record: 3-1
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 939 | McDowell, Chris (1500) | Won 2-1 | +181518 |
| 2sealed | 953 | DeLazier, Jay (1538) | Won 2-0 | +181536 |
| 3sealed | 822 | Barrett, Chris (1513) | Won 2-0 | +181554 |
| 4sealed | 696 | O'Brien, Matt (1754) | Lost 1-2 | -141540 |
| average opponent: 1576record: 3-1 | new rating: 1540 | |||