John KA Alderson
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| Player ID | 7124 |
| First Name | John KA |
| Last Name | Alderson |
| Sex | M |
| User ID | 0 |
| Club (used in grading individual event) | Beckenham & Bromley |
| DOB | **** |
| Local Rating | 0 |
| Local Rapid Rating | 0 |
| FIDE Code | 422711 |
| FIDE Federation | |
| ECF Grading Code | 253251H |
| Membership Number (entered manually) | |
| Membership Number (from grading list) | ME007970 |
| ECF Standard August | 149D |
| ECF Standard January | 149E |
| ECF Standard Old | 149D |
| ECF Rapid August | 0 |
| ECF Rapid January | 0 |
| ECF New Standrd July | 1818 |