J. Pannekoek
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Vlissingen HZ op 4th | 07/29/2000 | 887 |  Netherlands |
| NED sim | ??/??/1958 | 0 | Netherlands |
| Amsterdam ASC | ??/??/1926 | 0 | Netherlands |
| NED-BEL m | ??/??/1925 | 0 | Netherlands |
J. Pannekoek Repertoire with White pieces (most played)
| ECO | Opening | Games |
| A45 | Queen's pawn game | 2 games |
| E61 | King's Indian defence, 3.Nc3 | 1 games |
| A02 | Bird's opening | 1 games |
| D00 | Queen's pawn game | 1 games |
J. Pannekoek Repertoire with Black pieces (most played)
| ECO | Opening | Games |
| A90 | Dutch defence | 2 games |
| E94 | King's Indian, orthodox variation | 1 games |
| D85 | Gruenfeld, exchange variation | 1 games |
| D05 | Queen's pawn game | 1 games |
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