P. Folkertsma
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Alkmaar ACCOM op | ??/??/1993 | 0 | Netherlands |
| Alkmaar ACCOM op | ??/??/1992 | 75 | Netherlands |
| Alkmaar ACCOM op | ??/??/1991 | 0 | Netherlands |
| ACCOM op2 | ??/??/1990 | 0 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| D07 | Queen's Gambit Declined, Chigorin defence | 1 games |
| A52 | Budapest defence | 1 games |
| D15 | Queen's Gambit Declined Slav, 4.Nc3 | 1 games |
| D36 | Queen's Gambit Declined, exchange, positional line, 6.Qc2 | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B33 | Sicilian defence | 3 games |
| B07 | Pirc defence | 2 games |
| B06 | Robatsch (modern) defence | 1 games |
| E97 | King's Indian, orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation) | 1 games |


Netherlands