| Player ID | 43131 |
| First Name | Oskar |
| Last Name | Jarzynski |
| Sex | M |
| User ID | 0 |
| DOB | **** |
| Player lists | Crewe |
| Club | Crewe (7CRE) |
| Local Rating | 0 |
| Local Rapid Rating | 0 |
| FIDE Code | 0 |
| FIDE Federation | |
| ECF Rating Code (links to rating system) | 343048A |
| Membership Number (from rating list) | ME029198 |
| Membership Category | Silver |
| ECF Standard OTB August | 1420K |
| ECF Rapid OTB August | 1407A |
| ECF Standard OTB September | 1436K |
| ECF Rapid OTB September | 1407A |
| ECF Standard OTB September Old | 1416K |
| ECF Rapid OTB January | 1390A |
| ECF Standard OTB January | 1512K |
| ECF Rapid OTB Monthly | 1390A |
| ECF Standard OTB Monthly | 1560K |
| ECF Rapid OTB Latest | 1386A |
| ECF Standard OTB Latest | 1558K |
