Covington, Zack
Current rating: 1523
Record: 5-4
| Grand Prix Seattle-Tacoma 2012 (DKA limited) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 20 | Koch, Daniel (1500) | Won 2-1 | +181500 |
| 2sealed | 147 | Tachiyama, Jamie P (1500) | Won 2-0 | +181518 |
| 3sealed | 54 | Dedych, Luke P (1518) | Won 2-1 | +181536 |
| 4sealed | 141 | Ledbetter, Alex (1724) | Lost 1-2 | -141522 |
| 5sealed | 252 | Becker, Joshua (1536) | Won 2-0 | +181540 |
| 6sealed | 56 | Egashira, Kenji (1631) | Won 2-1 | +201560 |
| 7sealed | 70 | deChatonnayree, Erik T (1579) | Lost 1-2 | -181542 |
| 8sealed | 89 | Kolczynski, Walter (1503) | Lost 0-2 | -191523 |
| average opponent: 1561record: 5-3 | new rating: 1523 | |||
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 107 | Kolesnikov, Denis (1500) | Lost 0-2 | -181482 |
| record: 0-1 | new rating: 1482 | |||