Whitefield, Jonathan
Current rating: 1501
Record: 9-9
| Grand Prix Portland 2017 (XLN standard) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 269 | Franz-Knight, Max (1500) | Lost 1-2 | -181465 |
| 2standard | 667 | Burton, Justin (1466) | Lost 0-2 | -181447 |
| 3standard | 687 | Hanley, John (1463) | Won 2-0 | +181465 |
| 4standard | 538 | Ruiz III, Carlos (1510) | Won 2-0 | +191484 |
| 5standard | 472 | Cash, Daniel (1466) | Won 2-0 | +181502 |
| 6standard | 398 | Xu, Tianhao (1521) | Lost 0-2 | -181484 |
| 7standard | 388 | Ridgeway, Eric (1453) | Lost 0-2 | -181466 |
| 8standard | 444 | Morrone, David (1429) | Won 2-0 | +171483 |
| 9standard | 368 | Bostic, Gabriel (1511) | Won 2-1 | +181501 |
| average opponent: 1480record: 5-4 | new rating: 1501 | |||
| Grand Prix Portland 2016 (EMN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 405 | Mey, Nick (1500) | Lost 0-2 | -181482 |
| 2standard | 529 | Robin, Noel (1583) | Lost 1-2 | -161466 |
| 3standard | 793 | Church, Carson (1465) | Lost 1-2 | -181448 |
| 4standard | 759 | Gonzales, Benny (1463) | Won 2-1 | +181466 |
| 5standard | 647 | French, Cody (1463) | Lost 0-2 | -181448 |
| 6standard | 687 | Taylor, Dan (1427) | Won 2-0 | +181466 |
| 7standard | 570 | Finch, Shiloh (1468) | Won 2-1 | +181484 |
| 8standard | 437 | Randall, Keian (1489) | Won 2-1 | +181502 |
| 9standard | 364 | Gray, Jeremy (1437) | Lost 0-0 | -191483 |
| average opponent: 1477record: 4-5 | new rating: 1483 | |||