Jeffery, Clifton
Current rating: 1428
Record: 1-5
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1445 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 434 | Bryant, Steven (1479) | Lost 0-2 | -171428 |
| record: 0-1 | new rating: 1428 | |||
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 547 | O'Connor, Marc (1465) | Lost 1-2 | -191481 |
| 2sealed | 623 | Harker, Trevor (1484) | Won 2-1 | +181499 |
| 3sealed | 627 | Jordan, Larry (1502) | Lost 0-2 | -181481 |
| 4sealed | 632 | Ward, Christina (1446) | Lost 0-2 | -181463 |
| 5sealed | 702 | Kondriakan, Dmitriy (1467) | Lost 0-2 | -181445 |
| average opponent: 1473record: 1-4 | new rating: 1445 | |||