Sonja Van der Heuvel
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Haarlem AKN op 6th | ??/??/1997 | 1743 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| A87 | Dutch, Leningrad, main variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B82 | Sicilian, Scheveningen, 6.f4 | 1 games |
| A22 | English opening | 1 games |
| E30 | Nimzo-Indian, Leningrad variation | 1 games |


Netherlands