Gerrity, Tammy
Current rating: 1450
Record: 1-4
| Grand Prix Detroit 2013 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 162 | Hucklebridge, Chris (1500) | Won 2-0 | +181518 |
| 2modern | 75 | Pigeon, Adam (1493) | Lost 0-0 | -181500 |
| 3modern | 328 | Wen, Bernie (1760) | Lost 0-2 | -141486 |
| 4modern | 554 | Chamberlain, Matthew (1483) | Lost 0-2 | -181468 |
| 5modern | 624 | McLaughlin, Michael (1448) | Lost 0-2 | -181450 |
| average opponent: 1537record: 1-4 | new rating: 1450 | |||