Epperson, William
Current rating: 1494
Record: 5-6
| Grand Prix Portland 2016 (EMN standard) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 13 | Mitchell, Don (1482) | Lost 1-2 | -181466 |
| 2standard | 581 | Weis, Stuart (1507) | Won 2-0 | +191485 |
| 3standard | 573 | Gurisko, Kyle (1499) | Won 2-0 | +181503 |
| 4standard | 416 | Sloan, Shawn (1733) | Won 2-0 | +221525 |
| 5standard | 266 | Ramirez, Alex (1534) | Lost 1-2 | -181507 |
| 6standard | 385 | Oda, Hideto (1568) | Lost 1-2 | -171490 |
| 7standard | 386 | Chernov, Eugene (1483) | Won 2-0 | +181508 |
| 8standard | 378 | Brock, Hutch (1697) | Lost 1-2 | -141494 |
| average opponent: 1563record: 4-4 | new rating: 1494 | |||
| Grand Prix Seattle 2009 (ARB standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 80 | Roberts, Jesse (1519) | Won 2-0 | +181518 |
| 3standard | 81 | Vigderman, Constantine (1592) | Lost 1-2 | -161502 |
| 4standard | 275 | Plumb, Elliott (1518) | Lost 0-2 | -181484 |
| average opponent: 1543record: 1-2 | new rating: 1484 | |||