O'Neill, John R
Current rating: 1464
Record: 1-3
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 507 | Blume, Andrew (1485) | Lost 0-2 | -181482 |
| 2sealed | 627 | Grant, Tim (1482) | Lost 1-2 | -181464 |
| 3sealed | 711 | Calderon, Christopher (1466) | Won 2-0 | +181482 |
| 4sealed | 676 | Roth, Philippe (1470) | Lost 0-2 | -181464 |
| average opponent: 1476record: 1-3 | new rating: 1464 | |||