J. Krzewski
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Plock op rapid | ??/??/1994 | 605 | Poland |
| Darm Heinerfestpokal op | ??/??/1992 | 305 | Germany |
Most Played Openings as White
| ECO | Opening | Games |
| A51 | Budapest defence declined | 1 games |
| C60 | Ruy Lopez (Spanish opening) | 1 games |
| A96 | Dutch, classical variation | 1 games |
| A92 | Dutch defence | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B88 | Sicilian, Sozin, Leonhardt variation | 2 games |


Poland
Germany