Roberts, William
Current rating: 1468
Record: 2-4
| Grand Prix Denver 2019 (M20 standard) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 101 | Mandeau, Kohl (1407) | Won 2-1 | +171498 |
| 2standard | 72 | Major, Chris (1482) | Won 2-0 | +181516 |
| 3standard | 101 | Salley, Jace (1591) | Lost 0-2 | -171499 |
| 4standard | 91 | Anselmi, Leo (1486) | Lost 1-2 | -181481 |
| 5standard | 218 | Boss, Brian (1778) | Lost 1-2 | -131468 |
| average opponent: 1549record: 2-3 | new rating: 1468 | |||
| Grand Prix Daytona Beach 2007 (LRW limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 252 | Atkins, Wiliam J (1464) | Lost 0-2 | -191481 |
| record: 0-1 | new rating: 1481 | |||