Goodboe, Zach
Current rating: 1427
Record: 3-7
| Grand Prix Portland 2018 (modern) | starting rating: 1421 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 455 | Abbott, Timothy (1468) | Lost 0-2 | -171404 |
| 2modern | 463 | Bradley, Zachariah (1485) | Won 2-1 | +191423 |
| 3modern | 545 | Montgomery, Trevor (1498) | Won 2-1 | +201443 |
| 4modern | 422 | Selski, Benjamin (1580) | Lost 1-2 | -161427 |
| average opponent: 1508record: 2-2 | new rating: 1427 | |||
| Grand Prix Seattle 2018 (legacy) (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 233 | Huston, Benjamin (1473) | Lost 1-2 | -181482 |
| 2legacy | 543 | Worsfold, Jesse (1446) | Lost 0-2 | -191463 |
| 3legacy | 681 | Buenaventura, Jerome (1426) | Won 2-1 | +171480 |
| 4legacy | 709 | Schlesinger, Matt (1394) | Lost 0-2 | -191461 |
| 5legacy | 663 | Rotenburger, Arnold (1409) | Lost 0-2 | -191442 |
| 6legacy | 599 | Gemi, Jeffrey (1293) | Lost 0-2 | -211421 |
| average opponent: 1407record: 1-5 | new rating: 1421 | |||