O'Brien, Michael
Current rating: 1488
Record: 2-3
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 270 | Mccloskey, Benjamin (1446) | Won 2-1 | +171517 |
| 2sealed | 301 | PERLMUTTER, DANIEL (1518) | Lost 0-2 | -181499 |
| 3sealed | 445 | Finley, Khris (1503) | Won 2-0 | +181517 |
| 4sealed | 12 | Orr, Jim (1680) | Lost 0-2 | -151502 |
| 5sealed | 573 | Gennari Souza, Juliano (1715) | Lost 1-2 | -141488 |
| average opponent: 1572record: 2-3 | new rating: 1488 | |||