| Player ID | 10474 |
| First Name | John P |
| Last Name | Mainwaring |
| Sex | M |
| User ID | 0 |
| Club (used in grading individual event) | Barnby Dun |
| DOB | **** |
| Local Rating | 0 |
| Local Rapid Rating | 149 |
| FIDE Code | 0 |
| FIDE Federation | |
| ECF Grading Code | 104372K |
| Membership Number (entered manually) | |
| Membership Number (from grading list) | |
| ECF Standard Old | 138A |
| ECF Standard August | 130B |
| ECF Standard Pub | 130B |
| ECF Rapid August | 141D |
| ECF Rapid Pub | 141D |
| ECF Standard January | 138A |
| ECF Rapid January | 141D |
| ECF Monthly Standard | 1675 |
| ECF Monthly Rapid | 1758 |
| ECF Monthly July S | 1675 |
| ECF Monthly July R | 1758 |
