Yaffee, Zachary
Current rating: 1488
Record: 6-7
| Grand Prix Hartford 2018 (modern) | starting rating: 1444 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 598 | Donner, James (1500) | Won 2-0 | +191463 |
| 2modern | 292 | Hall, Tanner (1586) | Won 2-1 | +201483 |
| 3modern | 97 | Bozzuto, Michael (1536) | Lost 1-2 | -171466 |
| 4modern | 207 | Tomson, Michael (1462) | Won 2-0 | +181484 |
| 5modern | 334 | Borchart, Skylar (1527) | Won 2-1 | +191503 |
| 6modern | 100 | Fernandez, Fernando (1554) | Lost 0-2 | -171486 |
| 7modern | 336 | Perotti, Christopher (1536) | Won 2-1 | +191505 |
| 8modern | 165 | Hangley, James (1563) | Lost 1-2 | -171488 |
| average opponent: 1533record: 5-3 | new rating: 1488 | |||
| Grand Prix Richmond 2017 (AKH limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 71 | Lynch, Colin (1500) | Won 2-0 | +181518 |
| 2sealed | 164 | Fields, Caleb (1517) | Lost 1-2 | -181500 |
| 3sealed | 617 | Minuti, Joseph (1456) | Lost 1-2 | -191481 |
| 4sealed | 675 | Fox, James (1464) | Lost 0-2 | -181463 |
| 5sealed | 687 | Leff, Daniel (1428) | Lost 1-2 | -191444 |
| average opponent: 1473record: 1-4 | new rating: 1444 | |||