Portman, Jonah
Current rating: 1465
Record: 1-3
| Grand Prix Philadelphia 2014 (BNG limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 391 | Allen, Travis (1577) | Lost 0-2 | -171483 |
| 2sealed | 752 | Choy, Charles (1518) | Lost 0-2 | -171466 |
| 3sealed | 841 | MacGregor, Scott (1464) | Won 2-1 | +181484 |
| 4sealed | 791 | Nowakowski, Stephen (1454) | Lost 0-2 | -191465 |
| average opponent: 1503record: 1-3 | new rating: 1465 | |||