Machen, Rich
Current rating: 1464
Record: 1-3
| Grand Prix Minneapolis 2009 (ZEN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 184 | Engel, Jacquleyn N (1500) | Lost 0-2 | -181482 |
| 2sealed | 427 | Vorva, Shane (1482) | Lost 1-2 | -181464 |
| 3sealed | 458 | Lewis, Dan R (1463) | Won 2-0 | +181482 |
| 4sealed | 418 | Wilburn, Aaron (1482) | Lost 0-2 | -181464 |
| average opponent: 1482record: 1-3 | new rating: 1464 | |||