Roether, Ivan
Current rating: 1471
Record: 6-8
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1506 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 115 | Lindner, Jeff (1652) | Lost 0-2 | -151491 |
| 2modern | 607 | Bowers, Aaron (1481) | Won 2-1 | +181509 |
| 3modern | 732 | Heo, Seungho (1503) | Lost 0-2 | -181491 |
| 4modern | 736 | Torres, Luis (1497) | Won 2-1 | +181509 |
| 5modern | 611 | Amos, Dennis (1482) | Lost 1-2 | -191490 |
| 6modern | 690 | Klein, Andrew 8711 (1433) | Lost 0-2 | -191471 |
| average opponent: 1508record: 2-4 | new rating: 1471 | |||
| Grand Prix Phoenix 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 278 | Dingman, Scott (1428) | Won 2-0 | +171517 |
| 2modern | 188 | Rosenthal, Eli (1648) | Lost 1-2 | -161501 |
| 3modern | 315 | Leo, Joe (1536) | Won 2-0 | +191520 |
| 4modern | 214 | Jones, Oscar (1844) | Lost 0-2 | -131507 |
| 5modern | 361 | Bryant, Matthew (1370) | Won 2-1 | +161523 |
| 6modern | 218 | Chin, Jim (1508) | Won 2-0 | +181541 |
| 7modern | 169 | Galli, John (1667) | Lost 0-2 | -161525 |
| 8modern | 210 | Ramsey, Christopher (1496) | Lost 0-2 | -191506 |
| average opponent: 1562record: 4-4 | new rating: 1506 | |||