Ron Oortwijn
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| NED | ??/??/1998 | 553 |  Netherlands |
Ron Oortwijn Repertoire with White pieces (most played)
| ECO | Opening | Games |
| D16 | Queen's Gambit Declined Slav accepted, Alapin variation | 1 games |
| A87 | Dutch, Leningrad, main variation | 1 games |
| A51 | Budapest defence declined | 1 games |
| D87 | Gruenfeld, exchange, Spassky variation | 1 games |
Ron Oortwijn Repertoire with Black pieces (most played)
| ECO | Opening | Games |
| C45 | Scotch game | 2 games |
| A00 | Polish (Sokolsky) opening | 2 games |
| D03 | Torre attack (Tartakower variation) | 1 games |
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