Main, Zach
Current rating: 1469
Record: 3-5-1
| Grand Prix Chicago 2009 (legacy) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 162 | Baker, Luke (1499) | Lost 0-1 | -171466 |
| 3legacy | 293 | Fredericks, Michael (1500) | Won 1-0 | +181484 |
| 4legacy | 353 | Schmaltz Tziritas, Mathew (1569) | Lost 0-2 | -161468 |
| 5legacy | 307 | Hamerly, Jarrod (1500) | Won 2-1 | +181486 |
| 6legacy | 258 | Monroe, Will (1515) | Lost 0-2 | -171469 |
| average opponent: 1517record: 2-3 | new rating: 1469 | |||
| Grand Prix Detroit 2005 (BOK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 111 | LaDouceur, Christian (1549) | Won 2-1 | +191519 |
| 2sealed | 39 | Rawson, Ken (1466) | Lost 0-1 | -191500 |
| 3sealed | 124 | Greer, Edward (1581) | Draw 1-1 | +11501 |
| 4sealed | 160 | Rawson, Nate (1500) | Lost 0-2 | -181483 |
| average opponent: 1524record: 1-2-1 | new rating: 1483 | |||