Summerhays, Isaiah
Current rating: 1487
Record: 6-7
| Grand Prix Portland 2019 (ELD standard) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 85 | Monette, Nathan (1500) | Won 2-0 | +181501 |
| 2standard | 21 | Yang, Tommy (1522) | Won 2-0 | +181519 |
| 3standard | 91 | Valencia, Omar (1647) | Lost 0-0 | -151504 |
| 4standard | 150 | Chandler, Gene (1449) | Won 2-1 | +171521 |
| 5standard | 95 | Broussard, Joel (1569) | Lost 1-2 | -171504 |
| 6standard | 94 | Goodwin, Andrew (1566) | Lost 1-2 | -171487 |
| average opponent: 1542record: 3-3 | new rating: 1487 | |||
| Grand Prix Phoenix 2018 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 283 | Chang, Michael (1420) | Won 2-1 | +171517 |
| 2modern | 150 | Whitcomb, Paul (1617) | Lost 0-2 | -171500 |
| 3modern | 419 | Puhala, Joshua (1499) | Lost 0-2 | -181482 |
| 4modern | 564 | Hounslow, Matthew (1467) | Won 2-1 | +181500 |
| 5modern | 409 | Dudek, James (1521) | Lost 1-2 | -181482 |
| 6modern | 432 | Kanger, Kristopher (1487) | Won 2-0 | +191501 |
| 7modern | 330 | Gokgoz, Dominick (1512) | Lost 1-2 | -181483 |
| average opponent: 1503record: 3-4 | new rating: 1483 | |||