Gerbrand Koster
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Haarlem AKN op 8th | 07/02/1999 | 769 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| B48 | Sicilian, Taimanov variation | 1 games |
| C02 | French, advance variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C25 | Vienna game | 1 games |
| A92 | Dutch defence | 1 games |


Netherlands