Harkness, Addison
Current rating: 1454
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1453 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 550 | Dinsmore, Miles (1394) | Won 2-1 | +171470 |
| 2modern | 419 | Iwata, Sho (1431) | Lost 1-2 | -181452 |
| 3modern | 780 | Dewey, Will (1418) | Won 2-1 | +171469 |
| 4modern | 372 | Weigman, Gary (1562) | Lost 1-2 | -161453 |
| 5modern | 643 | Ngo, Scott (1551) | Won 2-0 | +191472 |
| 6modern | 416 | Taves, Jon (1444) | Lost 0-2 | -181454 |
| top | average opponent: 1467record: 3-3 | new rating: 1454 | ||
| Grand Prix Memphis 2018 (RIX standard) | starting rating: 1507 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 237 | Prieto, Danilo (1390) | Lost 1-2 | -201487 |
| 2standard | 397 | Mendoza, Robert (1533) | Lost 0-2 | -171470 |
| 3standard | 463 | Edgar, Brian (1567) | Lost 1-2 | -171453 |
| top | average opponent: 1497record: 0-3 | new rating: 1453 | ||
| Grand Prix Atlanta 2017 (XLN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 307 | Lacey, Jake (1532) | Lost 1-2 | -171483 |
| 2standard | 392 | Dacus, Jonathan (1501) | Won 2-1 | +181501 |
| 3standard | 516 | Nicholas, Jared (1500) | Won 2-0 | +181519 |
| 4standard | 352 | Rocha, Gabriel (1518) | Won 2-0 | +181537 |
| 5standard | 204 | Compere, Will (1536) | Lost 0-2 | -181519 |
| 6standard | 344 | Ababneh, Hemza (1409) | Won 2-0 | +161535 |
| 7standard | 153 | Molle, Niels (1902) | Lost 0-2 | -121523 |
| 8standard | 291 | Bohnhoff, Benjamin (1613) | Lost 0-2 | -161507 |
| top | average opponent: 1564record: 4-4 | new rating: 1507 | ||