Roberts, John
Current rating: 1527
Record: 9-7
| Grand Prix Paris 2011 (MBS limited) | starting rating: 1572 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1165 | De Momi, Mathias (1547) | Lost 1-2 | -181554 |
| 2sealed | 1229 | Hulander, Alexander (1482) | Won 2-0 | +171571 |
| 3sealed | 1130 | Amiguet, Jerome (1495) | Lost 1-2 | -201551 |
| 4sealed | 1291 | Schilling, Oliver (1484) | Lost 0-2 | -191532 |
| 5sealed | 1257 | Delpeuch, Charles (1464) | Lost 0-2 | -191513 |
| 6sealed | 1225 | Turek, Nicolas (1399) | Won 2-0 | +161529 |
| 7sealed | 1178 | Timmins, Guillaume (1521) | Lost 1-2 | -191510 |
| 8sealed | 1141 | Fonvieille, Arnaud (1444) | Won 2-0 | +171527 |
| average opponent: 1479record: 3-5 | new rating: 1527 | |||
| Grand Prix Birmingham 2008 (Lorwyn block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 183 | Shepherd, Iain (1500) | Won 2-1 | +181518 |
| 2block | 110 | Wojciechowski, Dawid (1588) | Lost 0-2 | -171501 |
| 3block | 108 | Praiwan, Thanakorn (1487) | Lost 0-2 | -181483 |
| 4block | 187 | Chooi, Yew Vern (1563) | Won 2-0 | +191502 |
| 5block | 182 | Hackett, Chris (1500) | Won 2-0 | +181520 |
| 6block | 165 | Bharmal, Mustafa (1525) | Won 0-0 | +191539 |
| 7block | 68 | Kreuz, Alexander (1512) | Won 2-1 | +171556 |
| 8block | 34 | Gosse, Maxime (1461) | Won 2-1 | +161572 |
| average opponent: 1517record: 6-2 | new rating: 1572 | |||