Bert Ridderbos
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Groningen SO ON Mini op-C | 12/??/2000 | 0 | Netherlands |
| Groningen ABM op | ??/??/1999 | 286 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| E85 | King's Indian, Saemisch, orthodox variation | 1 games |
| A52 | Budapest defence | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |


Netherlands