Powser, Robert S.
Current rating: 1538
Record: 5-3
| Grand Prix Portland 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 121 | Strickland, Caleb (1500) | Won 2-0 | +181518 |
| 2modern | 409 | Cozzoli, Kevin (1476) | Lost 0-2 | -191499 |
| 3modern | 476 | Rose, Carter (1477) | Won 2-0 | +181517 |
| 4modern | 348 | Jianu, Michael (1600) | Won 2-0 | +191536 |
| 5modern | 174 | Scott-Lewis, Benjamin (1564) | Lost 0-2 | -171519 |
| 6modern | 257 | Darlington, Kenny (1629) | Lost 0-2 | -161503 |
| 7modern | 386 | Lewis, Rolando (1465) | Won 2-0 | +171520 |
| 8modern | 323 | Connell, Sawyer (1537) | Won 2-0 | +181538 |
| average opponent: 1531record: 5-3 | new rating: 1538 | |||