Willem Van Der Werff
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| Player ID | 88802 |
| First Name | Willem |
| Last Name | Van Der Werff |
| Sex | M |
| User ID | 0 |
| DOB | **** |
| Player lists | Sussex Juniors |
| Club | Not Set |
| Local Rating | |
| Local Rapid Rating | |
| FIDE Code | |
| FIDE Federation | |
| ECF Rating Code (links to rating system) | 318973K |
| Membership Number (from rating list) | ME022770 |
| Membership Category | None |
| ECF Standard OTB September Old | 1308H |