Sampson, Frederick
Current rating: 1427
Record: 4-8
| Grand Prix Las Vegas 2019 (modern) (modern) | starting rating: 1461 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 1185 | Niko, Daniel (1500) | Lost 0-2 | -181443 |
| 2modern | 571 | Velarde, Alex (1403) | Lost 0-2 | -181425 |
| 3modern | 759 | Matuszewski, Andrew (1432) | Won 2-1 | +181443 |
| 4modern | 575 | Azadian, Shaunt (1477) | Lost 1-2 | -181425 |
| 5modern | 708 | Kravjanski, Thomas (1549) | Lost 0-2 | -151410 |
| 6modern | 618 | McCulley, Lance (1316) | Won 2-0 | +161426 |
| 7modern | 489 | Lagarde, Luc (1418) | Won 2-0 | +181444 |
| 8modern | 377 | Neumayer, Jordan (1496) | Lost 0-2 | -171427 |
| average opponent: 1449record: 3-5 | new rating: 1427 | |||
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 770 | Peymani, Aryan (1501) | Lost 0-1 | -181482 |
| 2modern | 751 | Nader, John (1466) | Won 2-1 | +181500 |
| 3modern | 719 | Efseroff, Robert (1360) | Lost 0-2 | -211479 |
| 4modern | 840 | Greer, Ryan (1448) | Lost 0-2 | -181461 |
| average opponent: 1444record: 1-3 | new rating: 1461 | |||