| Player ID | 24518 |
| First Name | John A |
| Last Name | Clark |
| Sex | M |
| User ID | 0 |
| DOB | **** |
| Player lists | Sheffield |
| Club | Sheffield (8YSA) |
| Local Rating | |
| Local Rapid Rating | |
| FIDE Code | 0 |
| FIDE Federation | |
| ECF Rating Code (links to rating system) | 180651J |
| Membership Number (from rating list) | ME019246 |
| Membership Category | Silver |
| ECF Standard OTB August | 1830A |
| ECF Rapid OTB August | 1633P |
| ECF Standard OTB September | 1830A |
| ECF Rapid OTB September | 1633P |
| ECF Standard OTB September Old | 1771K |
| ECF Rapid OTB January | 1633P |
| ECF Standard OTB January | 1814A |
| ECF Rapid OTB Monthly | 1633P |
| ECF Standard OTB Monthly | 1783A |
| ECF Rapid OTB Latest | 1633P |
| ECF Standard OTB Latest | 1797A |
