Jemmett, John
Current rating: 1468
Record: 4-6
| Grand Prix London 2013 (GTC limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 632 | Vikstrom, Christofer (1500) | Lost 1-2 | -181446 |
| 2sealed | 600 | Simmonds, Alex (1481) | Won 2-1 | +191465 |
| 3sealed | 633 | Reina, Carlos (1559) | Won 2-0 | +201485 |
| 4sealed | 597 | Sinclair, Sam (1469) | Won 2-1 | +171502 |
| 5sealed | 190 | Fava, Riccardo (1535) | Lost 1-2 | -171485 |
| 6sealed | 418 | Violette, Aurelie (1552) | Lost 1-2 | -171468 |
| average opponent: 1516record: 3-3 | new rating: 1468 | |||
| Grand Prix London 2011 (MBS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 299 | Coates, Richard (1527) | Lost 0-2 | -171483 |
| 2sealed | 319 | Taylor, Martin (1482) | Won 2-0 | +181501 |
| 3sealed | 326 | Sanders, Benjamin M (1469) | Lost 1-2 | -191482 |
| 4sealed | 357 | Gotfredsen, Anders (1470) | Lost 0-2 | -181464 |
| average opponent: 1487record: 1-3 | new rating: 1464 | |||