Hans Koster
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Garmisch Partenkirchen op | ??/??/1991 | 916 |  Germany |
| Hagen Hohenlimburg op | ??/??/1978 | 38 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| A52 | Budapest defence | 1 games |
| A22 | English opening | 1 games |
| E07 | Catalan, closed, 6...Nbd7 | 1 games |
| D50 | Queen's Gambit Declined, 4.Bg5 | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B97 | Sicilian, Najdorf, 7...Qb6 | 1 games |
| D53 | Queen's Gambit Declined, 4.Bg5 Be7 | 1 games |
| E20 | Nimzo-Indian defence | 1 games |
| B50 | Sicilian | 1 games |
