Williams, Jonas
Current rating: 1506
Record: 4-4
| Grand Prix Portland 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 631 | Bell, Thomas (1509) | Won 2-1 | +181518 |
| 2modern | 100 | Redmon, Skyler (1518) | Won 2-0 | +181536 |
| 3modern | 206 | Newhouse, Jackson (1634) | Lost 1-2 | -161520 |
| 4modern | 248 | Fung, Jeff (1784) | Lost 0-2 | -131507 |
| 5modern | 469 | Hlynosky, Bob (1471) | Won 2-0 | +171524 |
| 6modern | 247 | Serifsoy, Atesh (1518) | Lost 0-2 | -181506 |
| 7modern | 439 | Rothenberger, Andrew (1504) | Won 2-0 | +181524 |
| 8modern | 307 | Kan, Andrew (1552) | Lost 0-2 | -181506 |
| average opponent: 1561record: 4-4 | new rating: 1506 | |||