Piwetz, Ron
Current rating: 1416
Record: 2-7
| Grand Prix Dallas-Fort Worth 2019 (modern) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 144 | LaFon, David (1435) | Lost 0-2 | -181449 |
| 2modern | 400 | Crow, Quincy (1545) | Lost 0-2 | -171432 |
| 3modern | 593 | Ethridge, Daniel (1463) | Lost 1-2 | -171415 |
| 4modern | 571 | Contreras, Joel (1427) | Won 2-0 | +181433 |
| 5modern | 487 | McConnell, Caleb (1467) | Lost 1-2 | -171416 |
| average opponent: 1467record: 1-4 | new rating: 1416 | |||
| Grand Prix Dallas-Fort Worth 2016 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 388 | Garza, Justin (1488) | Won 2-0 | +181518 |
| 2modern | 287 | Feeman, Dylan (1788) | Lost 1-2 | -131505 |
| 3modern | 543 | Porreca, Stephen (1424) | Lost 0-2 | -201485 |
| 4modern | 727 | Martin, Jacob (1497) | Lost 0-2 | -181467 |
| average opponent: 1549record: 1-3 | new rating: 1467 | |||