Helgeson, Andrew W
Current rating: 1518
Record: 4-3
| Grand Prix Minneapolis 2009 (ZEN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 319 | Blunk, Jeffrey (1500) | Won 2-1 | +181518 |
| 2sealed | 20 | Beringer, Mike (1518) | Won 2-0 | +181536 |
| 3sealed | 161 | Balling, Victor (1537) | Won 2-0 | +181554 |
| 4sealed | 37 | Legler, Tad (1474) | Won 2-0 | +171571 |
| 5sealed | 21 | Mohr, Bryan (1679) | Lost 0-2 | -161555 |
| 6sealed | 120 | Stone, Justin (1473) | Lost 0-2 | -201535 |
| 7sealed | 194 | Andersen, Christoffer (1597) | Lost 0-2 | -171518 |
| average opponent: 1540record: 4-3 | new rating: 1518 | |||