J. Hartog
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Haarlem ACCOM op | ??/??/1991 | 245 | Netherlands |
| ACCOM op2 | ??/??/1988 | 0 | Netherlands |
| ACCOM op2 | ??/??/1987 | 0 | Netherlands |
| ACCOM op2 | ??/??/1986 | 0 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| B07 | Pirc defence | 2 games |
| C02 | French, advance variation | 1 games |
| B30 | Sicilian defence | 1 games |
| B50 | Sicilian | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C41 | Philidor's defence | 3 games |
| D06 | Queen's Gambit | 2 games |
| C56 | Two knights defence | 1 games |
| B03 | Alekhine's defence | 1 games |


Netherlands