Zack, Andrew
Current rating: 1460
Record: 2-4-2
| Grand Prix Detroit 2005 (BOK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 95 | Harris, William (1403) | Lost 0-2 | -201480 |
| 2sealed | 186 | Dye, James (1482) | Draw 1-1 | 01480 |
| 3sealed | 173 | Williamson, Scott (1386) | Lost 1-2 | -191461 |
| 4sealed | 212 | McGowan, Brian (1464) | Won 2-0 | +181479 |
| 5sealed | 175 | Zull, Chris (1479) | Lost 0-1 | -181461 |
| 6sealed | 152 | Wcisel, Jim (1465) | Lost 0-2 | -181443 |
| 7sealed | 124 | Vinson, Terrence (1447) | Draw 1-1 | 01443 |
| 8sealed | 102 | Zack, Andrea (1412) | Won 2-0 | +171460 |
| average opponent: 1442record: 2-4-2 | new rating: 1460 | |||