Gerhard Koester
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Pinneberg-ch | 08/11/2005 | 1776 | Germany |
| Pinneberg-ch | 08/12/2004 | 1720 | Germany |
| GER-chT Seniors 13th | 08/01/2004 | 1887 | Germany |
| Pinneberg Seniors op 5th | 06/03/2004 | 1553 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| B25 | Sicilian, closed | 8 games |
| C12 | French, MacCutcheon variation | 2 games |
| C88 | Ruy Lopez, closed | 2 games |
| B26 | Sicilian, closed, 6.Be3 | 2 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C36 | King's Gambit Accepted, Abbazia defence (classical defence, modern defence[!]) | 3 games |
| C55 | Two knights defence | 2 games |
| A04 | Reti opening | 2 games |
| C88 | Ruy Lopez, closed | 2 games |


Germany