Brinkerhoff, Jacob
Current rating: 1431
Record: 3-7
| Grand Prix Portland 2018 (modern) | starting rating: 1461 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 441 | Carcamo, Andrew (1500) | Won 2-0 | +181479 |
| 2modern | 330 | Barnes, Michael (1671) | Lost 1-2 | -141465 |
| 3modern | 539 | Hewitt, Thomas (1500) | Lost 1-2 | -181447 |
| 4modern | 652 | Westberg, Ryan (1536) | Lost 0-2 | -161431 |
| average opponent: 1552record: 1-3 | new rating: 1431 | |||
| Grand Prix Portland 2017 (XLN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 428 | Poppenhagen, David (1500) | Lost 1-2 | -181482 |
| 2standard | 648 | Mahr, Philip (1360) | Won 2-1 | +161498 |
| 3standard | 524 | Guggemos, Logan (1514) | Lost 1-2 | -181480 |
| 4standard | 587 | Passmore, Daniel (1412) | Lost 0-2 | -191461 |
| 5standard | 649 | Compton, Elan (1462) | Won 2-0 | +181479 |
| 6standard | 622 | Seaton, Carl (1463) | Lost 1-2 | -181461 |
| average opponent: 1452record: 2-4 | new rating: 1461 | |||