McDorman, Marshall
Current rating: 1516
Record: 5-4
| Grand Prix Kansas City 2013 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 123 | Kiefer, Kent (1500) | Lost 0-2 | -181482 |
| 2modern | 249 | Craig, Darian M (1433) | Won 2-1 | +171499 |
| 3modern | 270 | Hopkins, James (1352) | Lost 1-2 | -211478 |
| 4modern | 330 | Pilcher, Justin (1487) | Won 2-1 | +191497 |
| 5modern | 265 | Sidhu, Jesse (1524) | Won 2-0 | +181515 |
| 6modern | 231 | Rolf, David (1573) | Lost 0-2 | -171498 |
| 7modern | 269 | Bryant, James (1498) | Lost 0-2 | -181480 |
| 8modern | 234 | Johnson, Daniel (1433) | Won 2-0 | +171497 |
| 9modern | 186 | Strunk, Chase (1546) | Won 2-0 | +191516 |
| average opponent: 1483record: 5-4 | new rating: 1516 | |||