Lawhorn, Rex
Current rating: 1518
Record: 4-3
| Grand Prix Houston 2018 (RIX limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 59 | Woolsey, Paul (1447) | Lost 1-2 | -191481 |
| 2sealed | 215 | Valdez, Diego (1482) | Won 2-0 | +181499 |
| 3sealed | 289 | Uthuppan, Joseph (1347) | Won 2-1 | +151514 |
| 4sealed | 237 | Amaro, Luis (1555) | Lost 1-2 | -171497 |
| 5sealed | 210 | Roque Quezada, Francisco (1473) | Won 2-0 | +181515 |
| 6sealed | 189 | Bloch, Christopher (1520) | Won 2-1 | +181533 |
| 7sealed | 138 | Morris, Gareth (1717) | Lost 0-2 | -151518 |
| average opponent: 1506record: 4-3 | new rating: 1518 | |||