B. Ondersteijn
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Hengelo U12 op | ??/??/1998 | 0 | Netherlands |
| Hengelo op U12 | ??/??/1997 | 0 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| C45 | Scotch game | 3 games |
| B72 | Sicilian, dragon, 6.Be3 | 1 games |
| C41 | Philidor's defence | 1 games |
| C46 | Three knights game | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B52 | Sicilian, Canal-Sokolsky attack, 3...Bd7 | 2 games |
| D25 | Queen's Gambit Accepted, 4.e3 | 1 games |
| B70 | Sicilian, dragon variation | 1 games |
| B53 | Sicilian, Chekhover variation | 1 games |


Netherlands