Dennis Ruygrok
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| NED-ch U20 | 04/??/2002 | 941 | Netherlands |
| NED U14 op | ??/??/1999 | 0 | Netherlands |
| NED-ch U14 | 05/03/1999 | 154 | Netherlands |
| NED-ch U14 | ??/??/1998 | 79 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| C54 | Giuoco Piano | 4 games |
| C56 | Two knights defence | 1 games |
| B06 | Robatsch (modern) defence | 1 games |
| B26 | Sicilian, closed, 6.Be3 | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C55 | Two knights defence | 4 games |
| C47 | Four knights, Scotch variation | 3 games |
| C86 | Ruy Lopez, Worrall attack | 1 games |
| C89 | Ruy Lopez, Marshall counter-attack | 1 games |


Netherlands