Underwood, Donald E
Current rating: 1479
Record: 5-6
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1479 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 926 | Adkins, Camden (1500) | Lost 0-2 | -181461 |
| 2sealed | 1030 | Echeverria, Jat (1480) | Won 2-0 | +191480 |
| 3sealed | 1082 | Fallen, Scott D (1500) | Lost 1-2 | -181462 |
| 4sealed | 1113 | Cross, Nathan (1483) | Won 2-0 | +181480 |
| 5sealed | 1029 | Lewton, Jason (1500) | Won 2-0 | +191499 |
| 6sealed | 888 | Pozsgay, Marc (1424) | Lost 1-2 | -201479 |
| average opponent: 1481record: 3-3 | new rating: 1479 | |||
| Grand Prix Charleston 2012 (RTR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 135 | Ward, Adam (1500) | Lost 0-0 | -181482 |
| 2standard | 224 | Bouton, Anderson (1483) | Lost 0-2 | -181464 |
| 3standard | 244 | Brown, Rebecca (1346) | Won 2-1 | +161480 |
| 4standard | 237 | Shatz, Andrew (1482) | Won 2-0 | +181498 |
| 5standard | 227 | Winesburg, Kati (1447) | Lost 0-2 | -191479 |
| average opponent: 1452record: 2-3 | new rating: 1479 | |||