O. Marsman
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| NED U20 op | 08/09/1999 | 481 | Netherlands |
| Hengelo U20 op | ??/??/1998 | 201 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| B98 | Sicilian, Najdorf, 7...Be7 | 1 games |
| B45 | Sicilian, Taimanov variation | 1 games |
| D30 | Queen's gambit declined | 1 games |
| B72 | Sicilian, dragon, 6.Be3 | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C65 | Ruy Lopez, Berlin defence | 2 games |
| C45 | Scotch game | 1 games |
| A34 | English, symmetrical variation | 1 games |
| C30 | King's gambit | 1 games |


Netherlands