Cornelis J Nederkoorn
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| NED-chT | ??/??/1969 | 0 | Netherlands |
| FRG-NED U26 | 07/??/1965 | 0 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| B01 | Scandinavian (centre counter) defence | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C89 | Ruy Lopez, Marshall counter-attack | 1 games |


Netherlands
Germany