Vorster, William
Current rating: 1425
Record: 2-6
| Grand Prix Oklahoma City 2019 (ELD standard) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 23 | Creamer, Patrick (1484) | Lost 0-2 | -181462 |
| 2standard | 98 | Tankersley, Liam (1482) | Lost 1-2 | -181444 |
| 3standard | 156 | Sughroue, Daniel (1377) | Lost 0-2 | -191425 |
| average opponent: 1448record: 0-3 | new rating: 1425 | |||
| Grand Prix Dallas-Fort Worth 2016 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 535 | Tam, Wai (1033) | Won 2-0 | +101510 |
| 2modern | 162 | Buenrostro, Jesus (1773) | Lost 0-2 | -131497 |
| 3modern | 644 | Wilbert, Adam (1541) | Lost 1-2 | -171480 |
| 4modern | 840 | Hillard, Luke (1482) | Won 2-1 | +181498 |
| 5modern | 549 | Bentley, Chad (1505) | Lost 0-2 | -181480 |
| average opponent: 1467record: 2-3 | new rating: 1480 | |||