| Player ID | 18902 |
| First Name | Jonathan LB |
| Last Name | Blackburn |
| Sex | M |
| User ID | 0 |
| Club (used in grading individual event) | Holmes Chapel |
| DOB | **** |
| Local Rating | |
| Local Rapid Rating | |
| FIDE Code | 1801090 |
| FIDE Federation | |
| ECF Grading Code | 160594L |
| Membership Number (entered manually) | |
| Membership Number (from grading list) | ME008125 |
| ECF Standard Old | 211A |
| ECF Standard August | 214B |
| ECF Standard Pub | 214B |
| ECF Rapid August | 210D |
| ECF Rapid Pub | 210D |
| ECF Standard January | 211A |
| ECF Rapid January | 210D |
| ECF Online Standard | 2271 |
| ECF Online Rapid | 2275 |
| ECF Online Blitz | 2275 |
| ECF Monthly Standard | 2305 |
| ECF Monthly Rapid | 2275 |
| ECF Monthly July S | 2305 |
| ECF Monthly July R | 2275 |
