Valko, Jonathan
Current rating: 1617
| Grand Prix Portland 2018 (modern) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 357 | Ricci, Joseph (1775) | Lost 0-2 | -131514 |
| 3modern | 378 | Hamilton, Oliver (1516) | Won 2-0 | +181532 |
| 4modern | 285 | Small, Matthew (1621) | Won 2-0 | +191551 |
| 5modern | 157 | Brewer, Erik (1578) | Won 2-0 | +191570 |
| 6modern | 220 | Greene, Mack (1518) | Won 2-0 | +171587 |
| 7modern | 68 | Shanck, Matt (1561) | Won 2-0 | +171604 |
| 8modern | 31 | Rietzl, Paul (2129) | Lost 1-2 | -91595 |
| 9modern | 89 | Froehlich, Athena (1615) | Won 2-0 | +181613 |
| 10modern | 57 | Kusiek, James (1527) | Won 2-1 | +171630 |
| 11modern | 61 | Pressley, Chris (1592) | Lost 1-2 | -191611 |
| 12modern | 89 | Henderson, Craig (1648) | Won 2-1 | +191630 |
| 13modern | 60 | Laughlin, Pierson (1898) | Lost 0-2 | -131617 |
| top | average opponent: 1665record: 8-4 | new rating: 1617 | ||
| Grand Prix Seattle 2018 (legacy) (legacy) | starting rating: 1503 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 77 | Ingham, Timothy (1575) | Won 2-0 | +191522 |
| 2legacy | 132 | Cusick, Brian (1580) | Lost 0-2 | -171505 |
| 3legacy | 392 | Vogel, Matthew (1421) | Won 2-1 | +171522 |
| 4legacy | 90 | Diesenreiter, Simon (1649) | Won 2-1 | +201542 |
| 5legacy | 200 | Bridgman, Slater (1526) | Won 2-1 | +181560 |
| 6legacy | 183 | Herbers, Adam (1766) | Lost 1-2 | -151545 |
| 7legacy | 337 | Dacamara, Cameron (1538) | Lost 0-2 | -181527 |
| top | average opponent: 1579record: 4-3 | new rating: 1527 | ||
| Grand Prix Portland 2017 (XLN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 554 | Crockett, Alex (1500) | Lost 0-2 | -181482 |
| 2standard | 632 | Chappelle, Scott (1482) | Won 2-0 | +181500 |
| 3standard | 528 | McPoland, Stephen (1575) | Lost 0-2 | -171483 |
| 4standard | 674 | Tomlinson, Corey (1483) | Won 2-1 | +181501 |
| 5standard | 506 | Kim, Gregory (1419) | Won 2-0 | +171518 |
| 6standard | 225 | Swanson, Sam (1601) | Lost 0-2 | -171501 |
| 7standard | 445 | Wood, Keaton (1542) | Won 2-0 | +191520 |
| 8standard | 333 | Alberg, Robin (1546) | Won 2-0 | +191539 |
| 9standard | 225 | Mendez, Jared (1533) | Won 2-1 | +171556 |
| 10standard | 128 | Farnsworth, Paul (1549) | Lost 1-2 | -181538 |
| 11standard | 166 | Frantz, Shea (1532) | Lost 0-2 | -181520 |
| 12standard | 177 | Leach, William (1546) | Lost 0-2 | -171503 |
| top | average opponent: 1526record: 6-6 | new rating: 1503 | ||