Cobb, Winford
Current rating: 1448
Record: 1-4
| Grand Prix Houston 2018 (RIX limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 174 | McQuatters, Richard (1505) | Lost 1-2 | -181482 |
| 2sealed | 245 | Rhodes, Sean (1484) | Lost 0-2 | -181464 |
| 3sealed | 412 | Flores, Philip (1469) | Won 2-1 | +181482 |
| 4sealed | 301 | Sem, Paul (1597) | Lost 0-2 | -161466 |
| 5sealed | 357 | Johnson, Clyde (1466) | Lost 0-2 | -181448 |
| average opponent: 1504record: 1-4 | new rating: 1448 | |||