Klaas Jan Pos
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| NED U14 op | ??/??/1999 | 0 | Netherlands |
| Hengelo U12 op | ??/??/1998 | 0 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| C54 | Giuoco Piano | 3 games |
| C55 | Two knights defence | 2 games |
| C68 | Ruy Lopez, exchange variation | 1 games |
| C45 | Scotch game | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C50 | King's pawn game | 3 games |
| C65 | Ruy Lopez, Berlin defence | 1 games |
| C46 | Three knights game | 1 games |
| D07 | Queen's Gambit Declined, Chigorin defence | 1 games |


Netherlands