John Diekstra
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Leeuwarden op | ??/??/2004 | 305 | Netherlands |
| Gent op 20th | ??/??/1997 | 1420 | Belgium |
| Leeuwarden op | 08/??/1995 | 1321 | Netherlands |
| Wch U20 fin-B | ??/??/1961 | 0 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| E70 | King's Indian, 4.e4 | 3 games |
| B22 | Sicilian, Alapin's variation (2.c3) | 1 games |
| E69 | King's Indian, fianchetto, classical main line | 1 games |
| A89 | Dutch, Leningrad, main variation with Nc6 | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| A00 | Polish (Sokolsky) opening | 2 games |
| B01 | Scandinavian (centre counter) defence | 1 games |
| E92 | King's Indian, classical variation | 1 games |
| E04 | Catalan, open, 5.Nf3 | 1 games |


Netherlands
Belgium