Williams, Mark W
Current rating: 1463
Record: 1-3
| Grand Prix Kansas City 2011 (NPH limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 50 | Stewart, Phillip (1500) | Lost 1-2 | -181482 |
| 2sealed | 233 | Luttrell, Justin (1483) | Won 2-0 | +181500 |
| 3sealed | 259 | Do, Nhan T (1452) | Lost 0-2 | -191481 |
| 4sealed | 380 | Huston, Nathaniel (1482) | Lost 1-2 | -181463 |
| average opponent: 1479record: 1-3 | new rating: 1463 | |||