Sonja Dekker
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Hengelo op U16 | 08/??/2001 | 29 | Netherlands |
| NED-ch U16 op | 08/07/2000 | 0 | Netherlands |
| NED U14 op | ??/??/1999 | 0 | Netherlands |
| Hengelo U14 op | ??/??/1998 | 26 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| C50 | King's pawn game | 8 games |
| C57 | Two knights defence | 2 games |
| C55 | Two knights defence | 2 games |
| B07 | Pirc defence | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C50 | King's pawn game | 5 games |
| C62 | Ruy Lopez, old Steinitz defence | 2 games |
| C55 | Two knights defence | 2 games |
| D20 | Queen's gambit accepted | 2 games |


Netherlands