J. Thomassen
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| NRW-Liga I 8990 | ??/??/1990 | 410 |  Germany |
| Haifa ol (Men) | 11/??/1976 | 388 |  Israel |
Most Played Openings as White
| ECO | Opening | Games |
| B06 | Robatsch (modern) defence | 1 games |
| B71 | Sicilian, dragon, Levenfish variation | 1 games |
| B63 | Sicilian, Richter-Rauzer, Rauzer attack | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| B05 | Alekhine's defence, modern variation, 4...Bg4 | 1 games |
| C01 | French, exchange variation | 1 games |
| D03 | Torre attack (Tartakower variation) | 1 games |
