Powser, Robert L.
Current rating: 1448
Record: 2-5-1
| Grand Prix Portland 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 70 | Tucker, Colter (1475) | Lost 0-2 | -181482 |
| 2modern | 658 | Hammer, Kristina (1483) | Won 2-1 | +181500 |
| 3modern | 431 | Thomas, Michael (1434) | Won 2-1 | +161516 |
| 4modern | 441 | Ellis, Bennett (1739) | Lost 0-2 | -141502 |
| 5modern | 544 | Cobb, Andy (1501) | Lost 0-2 | -181484 |
| 6modern | 546 | Bateman, Ben (1563) | Draw 1-1 | +21486 |
| 7modern | 478 | Carbary, Justin (1390) | Lost 0-2 | -201466 |
| 8modern | 410 | Failing, Miles (1463) | Lost 0-2 | -181448 |
| average opponent: 1506record: 2-5-1 | new rating: 1448 | |||