Mark O'Brien
Primary tabs
| Player ID | 92530 |
| First Name | Mark |
| Last Name | O'Brien |
| Sex | M |
| User ID | 0 |
| DOB | **** |
| Player lists | None |
| Club | Muswell Hill (4254) |
| Local Rating | |
| Local Rapid Rating | |
| FIDE Code | |
| FIDE Federation | |
| ECF Rating Code (links to rating system) | 363550J |
| Membership Number (from rating list) | |
| Membership Category | None |
| ECF Standard OTB January | 1595P |
| ECF Standard OTB Monthly | 1411K |
| ECF Standard OTB Latest | 1411K |