| Player ID | 57189 |
| First Name | Jon G |
| Last Name | Duffield |
| Sex | M |
| User ID | 0 |
| DOB | **** |
| Player lists | None |
| Club | Cumbria CA (CCUM) |
| Local Rating | |
| Local Rapid Rating | |
| FIDE Code | |
| FIDE Federation | |
| ECF Rating Code (links to rating system) | 103176E |
| Membership Number (from rating list) | ME025490 |
| Membership Category | Gold |
| ECF Standard OTB August | 1481K |
| ECF Rapid OTB August | 1588K |
| ECF Standard OTB September | 1481K |
| ECF Rapid OTB September | 1588K |
| ECF Standard OTB September Old | 1449K |
| ECF Rapid OTB January | 1588K |
| ECF Standard OTB January | 1511K |
| ECF Rapid OTB Monthly | 1588K |
| ECF Standard OTB Monthly | 1476A |
| ECF Rapid OTB Latest | 1588K |
| ECF Standard OTB Latest | 1476K |
