Johnston, Jon
Current rating: 1431
Record: 6-10
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 670 | Aguirre, Jesse (1500) | Lost 0-2 | -171431 |
| top | record: 0-1 | new rating: 1431 | ||
| Grand Prix Seattle 2018 (standard) (RIX standard) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 350 | Gonzalez, David [USA] (1391) | Lost 0-2 | -201465 |
| 2standard | 404 | Rickards, Steven (1332) | Lost 1-2 | -211444 |
| 3standard | 678 | Green, Tom (1463) | Won 2-0 | +191463 |
| 4standard | 479 | Newland, Aaron (1481) | Lost 0-2 | -181445 |
| 5standard | 574 | Gies, Andrew (1418) | Won 2-1 | +181463 |
| 6standard | 458 | Roland, Desmond7800 (1483) | Won 2-1 | +181481 |
| 7standard | 367 | Iosso, Keith (1517) | Lost 0-2 | -171464 |
| 8standard | 316 | Lloyd, Tyrus (1603) | Lost 0-2 | -161448 |
| top | average opponent: 1461record: 3-5 | new rating: 1448 | ||
| Grand Prix Portland 2017 (XLN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 264 | Malain, Cory (1500) | Lost 0-2 | -181482 |
| 2standard | 509 | Ortiz, Sam (1418) | Won 2-1 | +171499 |
| 3standard | 637 | Smedley, Jerry (1495) | Lost 0-2 | -181481 |
| 4standard | 580 | Corson-Burnett, Dylan (1485) | Won 2-1 | +181499 |
| 5standard | 501 | Giuliani, Michael (1504) | Lost 0-2 | -181481 |
| 6standard | 517 | Buckman, Creyson (1486) | Won 2-1 | +181499 |
| 7standard | 487 | Broadstone, Benjamin (1695) | Lost 1-2 | -141485 |
| top | average opponent: 1512record: 3-4 | new rating: 1485 | ||