Bert Duijker
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Vienna op-A 15th | 07/29/2006 | 2040 | Austria |
| Politiken Cup 25th | 07/14/2003 | 1366 | Denmark |
| Schwarzach op-B | 08/??/2002 | 388 | Austria |
Most Played Openings as White
| ECO | Opening | Games |
| D11 | Queen's Gambit Declined Slav, 3.Nf3 | 1 games |
| D76 | Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb6 | 1 games |
| A40 | Queen's pawn | 1 games |
| D74 | Neo-Gruenfeld, 6.cd Nxd5, 7.O-O | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B06 | Robatsch (modern) defence | 3 games |
| B09 | Pirc, Austrian attack | 1 games |
| A42 | Modern defence, Averbakh system | 1 games |
| A87 | Dutch, Leningrad, main variation | 1 games |
Netherlands
Male
FIDE ID:

Austria
Denmark