Erich Rudolf Koser
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| NB op | ??/??/1992 | 60 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| A02 | Bird's opening | 3 games |
| A03 | Bird's opening | 2 games |
Most Played Openings as Black
| ECO | Opening | Games |
| E14 | Queen's Indian, 4.e3 | 1 games |
| D02 | Queen's pawn game | 1 games |
| A10 | English opening | 1 games |
| E30 | Nimzo-Indian, Leningrad variation | 1 games |


Germany