| Name: | Ron Oortwijn |
| Federation: |  |
| Years: | 1998 - 1998 |
| Total Games: | 11 |
| Wins: | 3 (27.27 %) |
| Draws: | 7 (63.64 %) |
| Losses: | 1 (9.09 %) |
| Score: | 59.09 % |
| Tournament | Date | Elo Avg. | Country |
| NED | ??/??/1998 | 553 |  Netherlands |
| ECO | Opening | Games |
| A56 | Benoni defence | 1 games |
| C18 | French, Winawer, advance variation | 1 games |
| D87 | Gruenfeld, exchange, Spassky variation | 1 games |
| A51 | Budapest defence declined | 1 games |
| ECO | Opening | Games |
| C45 | Scotch game | 2 games |
| A00 | Polish (Sokolsky) opening | 2 games |
| D03 | Torre attack (Tartakower variation) | 1 games |
| White | ELO W | Black | ELO B | Result | Moves | ECO | Date | Tournament | View |
| Oortwijn, R | De Ruiter, T | 2125 | 1-0  |
33 | A56 | 1998 | NED |
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| Oortwijn, R | Hage, H | ½-½ |
40 | C18 | 1998 | NED |
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| Oortwijn, R | Legemaat, G | 2235 | 1-0 |
22 | D87 | 1998 | NED |
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| Oortwijn, R | Massy, G | ½-½ |
22 | A51 | 1998 | NED |
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| Oortwijn, R | Oomen, A | ½-½ |
43 | D16 | 1998 | NED |
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| Oortwijn, R | Van Wieringen, C | ½-½ |
39 | A87 | 1998 | NED |
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| De Waard, J | Oortwijn, R | ½-½ |
31 | C45 | 1998 | NED |
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| Pommerel, W | Oortwijn, R | 1-0 |
39 | A00 | 1998 | NED |
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| Smit, J | Oortwijn, R | ½-½ |
21 | D03 | 1998 | NED |
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| Stuart, A | Oortwijn, R | ½-½ |
27 | C45 | 1998 | NED |
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| Welling, G | 2335 | Oortwijn, R | 0-1 |
17 | A00 | 1998 | NED |
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