Gertjan Thomassen
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| Tilburg Stukkenjagers op-A | 08/18/2006 | 1372 |  Netherlands |
| Utrecht OKU op | 06/??/2004 | 1201 | Netherlands |
| Tilburg Eksakt op | 08/??/2003 | 1435 | Netherlands |
| Tilburg Eksakt op | 08/22/2003 | 1475 | Netherlands |
Most Played Openings as White
| ECO | Opening | Games |
| A29 | English, four knights, kingside fianchetto | 1 games |
| B09 | Pirc, Austrian attack | 1 games |
Most Played Openings as Black
| ECO | Opening | Games |
| C02 | French, advance variation | 2 games |
| C63 | Ruy Lopez, Schliemann defence | 2 games |
| A80 | Dutch | 1 games |
| C06 | French, Tarrasch, closed variation, main line | 1 games |
