Zack, Christopher J
Current rating: 1519
Record: 6-5-1
| Grand Prix Nashville 2010 (SOM limited) | starting rating: 1558 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 36 | Lagorio, Christian J (1518) | Won 2-1 | +171575 |
| 3sealed | 67 | Chasan, Ze'Eva (1517) | Lost 0-2 | -191556 |
| 4sealed | 186 | Raye, Joshua (1518) | Lost 1-2 | -181538 |
| 5sealed | 249 | Perdue, Eric J (1500) | Lost 1-2 | -191519 |
| average opponent: 1513record: 1-3 | new rating: 1519 | |||
| Grand Prix Chicago 2009 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 139 | Poehling, Rick (1575) | Won 2-0 | +191519 |
| 3legacy | 19 | Somers, Stu (1657) | Lost 1-2 | -151504 |
| 4legacy | 161 | Carey, Edward (1516) | Won 2-0 | +181522 |
| 5legacy | 111 | Weinberger, Andrew (1482) | Won 2-1 | +171539 |
| 6legacy | 119 | Boomer, Chris (1508) | Won 2-1 | +181557 |
| 7legacy | 79 | Khanin, Alex (1569) | Draw 1-1 | 01557 |
| 8legacy | 52 | Higashi, Chris (1626) | Lost 0-2 | -171540 |
| 9legacy | 114 | Lee, Robert N (1533) | Won 2-1 | +181558 |
| average opponent: 1558record: 5-2-1 | new rating: 1558 | |||