Doughty, Sumner
Current rating: 1491
Record: 2-3
| Grand Prix Houston 2018 (RIX limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 67 | Thomas, Travis (1716) | Won 2-1 | +221522 |
| 2sealed | 111 | Aguilar, Ben (1518) | Won 2-1 | +181540 |
| 3sealed | 155 | Cook, Samuel (1630) | Lost 0-2 | -171523 |
| 4sealed | 171 | Schaub, David (1615) | Lost 1-2 | -161507 |
| 5sealed | 327 | Guerra, Ricardo [MEX] (1590) | Lost 0-2 | -161491 |
| average opponent: 1614record: 2-3 | new rating: 1491 | |||