Hans Dieter Koester
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Kiel op | 05/09/1965 | 0 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| C02 | French, advance variation | 2 games |
| B26 | Sicilian, closed, 6.Be3 | 1 games |
| B25 | Sicilian, closed | 1 games |
| C81 | Ruy Lopez, open, Howell attack | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| A45 | Queen's pawn game | 1 games |
| C45 | Scotch game | 1 games |
| E55 | Nimzo-Indian, 4.e3, Gligoric system, Bronstein variation | 1 games |
| C72 | Ruy Lopez, modern Steinitz defence, 5.O-O | 1 games |


Germany