| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. G Timmerman vs U Dewenter |
| 1-0 | 35 | 1993 | Ostend op | B03 Alekhine's Defense |
| 2. U Dewenter vs D Pavasovic |
| ½-½ | 31 | 1995 | Bled Open-A | C42 Petrov Defense |
| 3. U Dewenter vs R Schlappa |
| 0-1 | 30 | 1996 | Staufer Open | C16 French, Winawer |
| 4. U Dewenter vs D Reinderman |
| 0-1 | 41 | 1996 | Cappelle Open | B33 Sicilian |
| 5. A Kovalev vs U Dewenter |
| 1-0 | 29 | 1996 | Cappelle Open | B06 Robatsch |
| 6. U Dewenter vs T Pfaffel |
| 1-0 | 25 | 1996 | Graz Open | B90 Sicilian, Najdorf |
| 7. V Beim vs U Dewenter |
| 1-0 | 20 | 1996 | Graz Open | A41 Queen's Pawn Game (with ...d6) |
| 8. U Dewenter vs F Riemelmoser |
| 1-0 | 29 | 1996 | Graz Open | C24 Bishop's Opening |
| 9. I Farago vs U Dewenter |
| 1-0 | 22 | 1996 | Graz Open | A56 Benoni Defense |
| 10. U Dewenter vs R Bachler |
| ½-½ | 45 | 1996 | Graz Open | B93 Sicilian, Najdorf, 6.f4 |
| 11. O Krassnitzer vs U Dewenter |
| 0-1 | 23 | 1996 | Graz Open | D85 Grunfeld |
| 12. F Brandstaetter vs U Dewenter |
| ½-½ | 23 | 1996 | Graz Open | C10 French |
| 13. U Dewenter vs M Cebalo |
| 0-1 | 29 | 1996 | Graz Open | B83 Sicilian |
| 14. W Ebner vs U Dewenter |
| 0-1 | 50 | 1996 | Graz Open | A07 King's Indian Attack |
| 15. H R Omarsson vs U Dewenter |
| 0-1 | 25 | 1998 | Reykjavik Open | A45 Queen's Pawn Game |
| 16. U Dewenter vs R Djurhuus |
| 0-1 | 63 | 1998 | Reykjavik Open | B39 Sicilian, Accelerated Fianchetto, Breyer Variation |
| 17. U Dewenter vs Miles |
| 0-1 | 32 | 1998 | Reykjavik Open | B41 Sicilian, Kan |
| 18. H Wiese vs U Dewenter |
| 0-1 | 42 | 1998 | Reykjavik Open | B04 Alekhine's Defense, Modern |
| 19. U Dewenter vs E K Einarsson |
| ½-½ | 50 | 1998 | Reykjavik Open | B02 Alekhine's Defense |
| 20. M M Ivanov vs U Dewenter |
| 1-0 | 28 | 1998 | Reykjavik Open | D94 Grunfeld |
| 21. U Dewenter vs J Halldorsson |
| ½-½ | 45 | 1998 | Reykjavik Open | C11 French |
| 22. K Edvardsson vs U Dewenter |
| ½-½ | 41 | 1998 | Reykjavik Open | A56 Benoni Defense |
| 23. H Petermann vs U Dewenter |
| ½-½ | 16 | 1998 | Reykjavik Open | C04 French, Tarrasch, Guimard Main line |
| 24. K Podzielny vs U Dewenter |
| 1-0 | 31 | 2001 | Osteropen | A46 Queen's Pawn Game |
| 25. U Dewenter vs D Curic |
| 1-0 | 46 | 2001 | Osteropen | B07 Pirc |
Kibitzing
