Netherlands
FIDE ID:
Klaas Jaap Harmsen
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Soest op | 05/25/2001 | 1901 |  Netherlands |
Klaas Jaap Harmsen Repertoire with White pieces (most played)
| ECO | Opening | Games |
| A87 | Dutch, Leningrad, main variation | 1 games |
| E97 | King's Indian, orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation) | 1 games |
| E94 | King's Indian, orthodox variation | 1 games |
Klaas Jaap Harmsen Repertoire with Black pieces (most played)
| ECO | Opening | Games |
| E98 | King's Indian, orthodox, Aronin-Taimanov, 9.Ne1 | 1 games |
| B08 | Pirc, classical (two knights) system | 1 games |
| B07 | Pirc defence | 1 games |
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