MacHaffie, Sam
Current rating: 1585
Record: 9-5-1
| Grand Prix Indianapolis 2016 (modern) | starting rating: 1581 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 18 | Osborne, Jacob (1605) | Won 2-1 | +191600 |
| 2modern | 437 | Stone, Joshua (1511) | Won 2-0 | +161616 |
| 3modern | 296 | Haughey, Colin (1653) | Won 2-1 | +191635 |
| 4modern | 204 | Klenotic, Tom (1680) | Lost 0-2 | -181617 |
| 5modern | 423 | Donegan, Dylan (1886) | Lost 1-2 | -131604 |
| 6modern | 451 | Wills, Matt (1519) | Lost 0-2 | -191585 |
| average opponent: 1642record: 3-3 | new rating: 1585 | |||
| Grand Prix Las Vegas 2015 (2) (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 330 | de la Garza, Lisandro (1639) | Won 2-0 | +211521 |
| 2sealed | 317 | Smith, Jesse (1502) | Lost 1-2 | -191502 |
| 3sealed | 325 | Langbehn, Adam (1571) | Won 2-0 | +191521 |
| 4sealed | 361 | Heilicher, Ethan (1749) | Won 2-1 | +231544 |
| 5sealed | 218 | Tuvey, Stuart (1592) | Draw 1-1 | 01544 |
| 6sealed | 164 | Hamilton, Alexander (1609) | Won 2-1 | +201564 |
| 7sealed | 92 | Pang, Siteng (1569) | Won 2-1 | +181582 |
| 8sealed | 56 | Matheson, Brandon (1551) | Won 2-1 | +171599 |
| 9sealed | 33 | Leafdahl, Malachi (1597) | Lost 0-2 | -181581 |
| average opponent: 1598record: 6-2-1 | new rating: 1581 | |||