Grafton, Michael
Current rating: 1524
Record: 8-7
| Grand Prix Columbus 2019 (modern) | starting rating: 1479 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 161 | Wang, Sho (1525) | Won 2-1 | +191498 |
| 2modern | 99 | Latture, Austin (1518) | Won 2-1 | +181516 |
| 3modern | 80 | Holmes, John (1535) | Lost 0-2 | -171499 |
| 4modern | 159 | Hoffmann, Matthew (1584) | Won 2-0 | +191518 |
| 5modern | 79 | Bourbon, Michael (1538) | Won 2-1 | +181536 |
| 6modern | 54 | Steven, Austen (1530) | Lost 1-2 | -181518 |
| 7modern | 84 | Davis, Austin (1546) | Won 2-1 | +191537 |
| 8modern | 51 | Nguyen, Tuan (1819) | Lost 0-2 | -131524 |
| average opponent: 1574record: 5-3 | new rating: 1524 | |||
| Grand Prix Columbus 2016 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 279 | Loetzner, Merlin (1501) | Lost 1-2 | -181482 |
| 2legacy | 439 | Grim, Thomas (1438) | Won 2-1 | +171499 |
| 3legacy | 649 | McCutcheon, Tom (1498) | Won 2-1 | +181517 |
| 4legacy | 444 | Poe, Benjamin (1519) | Lost 1-2 | -181499 |
| 5legacy | 665 | Klements, Michael (1502) | Lost 1-2 | -181481 |
| 6legacy | 586 | Bastin, Benjamin (1380) | Won 2-0 | +161497 |
| 7legacy | 459 | Long, Byron (1473) | Lost 1-2 | -181479 |
| average opponent: 1473record: 3-4 | new rating: 1479 | |||