Jan Hendrik Heemskerk
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Amsterdam | ??/??/1899 | 0 |  Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| B45 | Sicilian, Taimanov variation | 2 games |
| C01 | French, exchange variation | 2 games |
| C67 | Ruy Lopez, Berlin defence, open variation | 2 games |
| B34 | Sicilian, accelerated fianchetto, exchange variation | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C67 | Ruy Lopez, Berlin defence, open variation | 3 games |
| D35 | Queen's Gambit Declined, 3...Nf6 | 1 games |
| D37 | Queen's Gambit Declined, 4.Nf3 | 1 games |
| C30 | King's gambit | 1 games |
