Guffey, Zachary
Current rating: 1469
Record: 1-3
| Grand Prix Miami 2013 (DGM standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 4standard | 117 | Teneyck, Zach (1552) | Lost 1-2 | -171483 |
| 5standard | 204 | Fior, Daniel (1659) | Lost 1-2 | -151468 |
| 6standard | 290 | Walsh, Michael (1505) | Won 2-0 | +191487 |
| 7standard | 154 | Humphreys, Erik (1483) | Lost 0-2 | -181469 |
| average opponent: 1550record: 1-3 | new rating: 1469 | |||