Kirkham, Jonathan
Current rating: 1503
Record: 4-4
| Grand Prix Portland 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 35 | Haddock, Esric (1521) | Won 2-0 | +181518 |
| 2modern | 211 | Cates, James (1452) | Lost 0-2 | -191499 |
| 3modern | 684 | Spriggs, Weston (1500) | Lost 1-2 | -181481 |
| 4modern | 683 | Cornfield, Ethan (1513) | Lost 1-2 | -171464 |
| 5modern | 716 | Loomis, Tyler (1361) | Won 2-0 | +161480 |
| 6modern | 559 | Goles, Nicolas (1769) | Won 2-1 | +231503 |
| 7modern | 418 | Emerson, Kevin (1500) | Won 2-0 | +181521 |
| 8modern | 285 | Cartier, Matthew (1532) | Lost 1-2 | -181503 |
| average opponent: 1518record: 4-4 | new rating: 1503 | |||