Koski, Ryan
Current rating: 1550
Record: 5-3
| Grand Prix Las Vegas 2019 (modern) (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 10 | Galacgac, Daniel (1502) | Won 2-0 | +181518 |
| 2modern | 337 | Cemo, Adam (1540) | Won 2-0 | +181536 |
| 3modern | 99 | Braden, Tyler (1536) | Won 2-0 | +181554 |
| 4modern | 84 | Weiser, Daniel (1975) | Won 2-1 | +261580 |
| 5modern | 33 | [anonymous] | Won 2-1 | +211601 |
| 6modern | 1177 | Graham, Michael (1572) | Lost 1-2 | -181583 |
| 7modern | 132 | Zhu, David (1764) | Lost 0-2 | -151568 |
| 8modern | 108 | Nguyen, Johny (1557) | Lost 1-2 | -181550 |
| average opponent: 1654record: 5-3 | new rating: 1550 | |||