P. Koster
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Vlissingen HZ op 6th | 08/04/2002 | 1001 |  Netherlands |
| Vlissingen HZ op 3rd | 08/09/1999 | 678 | Netherlands |
| Vlissingen HZ op 2nd | 07/??/1998 | 685 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| B30 | Sicilian defence | 1 games |
| B06 | Robatsch (modern) defence | 1 games |
| C06 | French, Tarrasch, closed variation, main line | 1 games |
| B70 | Sicilian, dragon variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| D34 | Queen's Gambit Declined, Tarrasch, Prague variation, 7...Be7 | 1 games |
| D03 | Torre attack (Tartakower variation) | 1 games |
| A38 | English, symmetrical variation | 1 games |
| A08 | Reti, King's Indian attack | 1 games |
