McMahan, Ryan P
Current rating: 1551
Record: 6-5
| Grand Prix Portland 2013 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 4modern | 134 | Froehlich, Eric (2145) | Won 2-0 | +281528 |
| 5modern | 57 | Chan, Robbie (1537) | Won 2-0 | +181546 |
| 6modern | 2 | Dezani, Jeremy (2011) | Won 2-1 | +261572 |
| 7modern | 12 | Estratti, Samuele (1998) | Lost 0-2 | -101562 |
| 8modern | 27 | Lozano, Andrew (1553) | Won 2-0 | +181580 |
| 9modern | 30 | Pardee, Samuel (1780) | Lost 0-2 | -151565 |
| 10modern | 40 | Metzger, Jonathan (1572) | Lost 0-2 | -181547 |
| 11modern | 59 | Gunderson, Isaiah (1587) | Lost 0-2 | -171530 |
| 12modern | 61 | Lallemand, John (1558) | Won 2-0 | +191549 |
| 13modern | 57 | Harbison, Justin (1549) | Won 2-1 | +181567 |
| 14modern | 46 | Cibak, Andrea (1692) | Lost 1-2 | -161551 |
| average opponent: 1726record: 6-5 | new rating: 1551 | |||