| Player ID | 5592 |
| First Name | Derek |
| Last Name | Cosens |
| Sex | M |
| User ID | 0 |
| DOB | **** |
| Player lists | Hastings & St Leonar |
| Club | Hastings & St Leonards (8150) |
| Local Rating | 0 |
| Local Rapid Rating | 1500 |
| FIDE Code | 0 |
| FIDE Federation | |
| ECF Rating Code (links to rating system) | 247569J |
| Membership Number (from rating list) | ME004208 |
| Membership Category | Silver |
| ECF Standard OTB January | 1634K |
| ECF Standard OTB August | 1599K |
| ECF Standard OTB September | 1599K |
| ECF Standard OTB September Old | 1643K |
| ECF Standard OTB Monthly | 1605K |
| ECF Standard OTB Latest | 1620K |
