Roidt, Joseph P
Current rating: 1466
Record: 1-3
| Grand Prix Detroit 2013 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 150 | Peever, Ben (1461) | Won 2-1 | +171517 |
| 2modern | 146 | Petkoff, Drew (1570) | Lost 0-0 | -171500 |
| 3modern | 352 | Deffenbaugh, Zachary (1498) | Lost 0-2 | -181482 |
| 4modern | 532 | Jiang, Yiren (1572) | Lost 0-2 | -161466 |
| average opponent: 1525record: 1-3 | new rating: 1466 | |||