Gruver, Robert
Current rating: 1502
Record: 7-7
| Grand Prix Houston 2018 (RIX limited) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 113 | Baker, Steve (1325) | Won 2-1 | +151514 |
| 2sealed | 55 | Horn, Kyle (1520) | Lost 0-2 | -181496 |
| 3sealed | 296 | Ferri, Michael (1587) | Lost 1-2 | -161480 |
| 4sealed | 298 | Edwards, David (1479) | Won 2-0 | +181498 |
| 5sealed | 238 | Monahan, Kevin (1499) | Won 2-1 | +181516 |
| 6sealed | 181 | Melvin, Paul (1770) | Lost 1-2 | -141502 |
| average opponent: 1530record: 3-3 | new rating: 1502 | |||
| Grand Prix Houston 2016 (OGW standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 339 | Fritz, Garrett (1500) | Lost 0-2 | -181482 |
| 2standard | 546 | Maestretti, William (1482) | Won 2-0 | +181500 |
| 3standard | 428 | Lun, Kevin (1500) | Lost 0-2 | -181482 |
| 4standard | 734 | Barhorst, Reicher (1481) | Won 2-0 | +181500 |
| 5standard | 435 | Hernandez, Reuben (1497) | Won 2-1 | +181518 |
| 6standard | 370 | Deerman, Jason (1499) | Lost 1-2 | -181500 |
| 7standard | 540 | Treece, Donnie (1503) | Won 2-0 | +181518 |
| 8standard | 393 | James, Scott (1490) | Lost 0-2 | -191499 |
| average opponent: 1494record: 4-4 | new rating: 1499 | |||