Dey, Jonny
Current rating: 1379
Record: 3-10
| Grand Prix London 2015 (ORI standard) | starting rating: 1444 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 749 | Garcia Guerrero, Luis (1548) | Lost 1-2 | -161428 |
| 2standard | 840 | Uttridge, Paul (1499) | Lost 0-2 | -171411 |
| 3standard | 1039 | Harris, Daniel G (1465) | Lost 0-2 | -171394 |
| 4standard | 1055 | Bladen, Ross (1446) | Won 2-1 | +191413 |
| 5standard | 1022 | Harsh, Christopher (1463) | Lost 1-2 | -171396 |
| 6standard | 953 | Statham, Rhys (1437) | Lost 0-2 | -171379 |
| average opponent: 1476record: 1-5 | new rating: 1379 | |||
| Grand Prix London 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 307 | Mackie, Craig (1500) | Lost 0-2 | -181482 |
| 2sealed | 496 | Ford, Sam (1462) | Lost 1-2 | -181464 |
| 3sealed | 729 | Rohm, Bjorn (1381) | Lost 1-2 | -201444 |
| 4sealed | 903 | Boughton, Alex (1347) | Won 2-1 | +161460 |
| 5sealed | 768 | de Kler, Tijs (1542) | Lost 1-2 | -161444 |
| 6sealed | 747 | Chalubert, Antoine (1442) | Won 2-1 | +181462 |
| 7sealed | 599 | Flasco, Norbert (1467) | Lost 0-2 | -181444 |
| average opponent: 1449record: 2-5 | new rating: 1444 | |||