| Player ID | 29479 |
| First Name | John |
| Last Name | Costello |
| Sex | M |
| User ID | 0 |
| DOB | **** |
| Player lists | Isle of Man |
| Club | Isle of Man (7IOM) |
| Local Rating | 0 |
| Local Rapid Rating | 0 |
| FIDE Code | 451819 |
| FIDE Federation | IOM |
| ECF Rating Code (links to rating system) | 230075J |
| Membership Number (from rating list) | ME007646 |
| Membership Category | Gold |
| ECF Standard OTB August | 1796K |
| ECF Rapid OTB August | 1780K |
| ECF Standard OTB September | 1796K |
| ECF Rapid OTB September | 1780K |
| ECF Standard OTB September Old | 1759K |
| ECF Rapid OTB January | 1766K |
| ECF Standard OTB January | 1833K |
| ECF Rapid OTB Monthly | 1756K |
| ECF Standard OTB Monthly | 1829K |
| ECF Rapid OTB Latest | 1756K |
| ECF Standard OTB Latest | 1829K |
| FIDE Standard | 1828 |
| FIDE Rapid | 0 |
| FIDE Blitz | 0 |
