| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Seirawan vs M Wiedenkeller |
 | 1-0 | 36 |
1979 |
Wch U18 | A17 English |
| 2. F A Cuijpers vs M Wiedenkeller |
| 1-0 | 42 |
1981 |
EU-ch jr | C17 French, Winawer, Advance |
| 3. M Wiedenkeller vs Plaskett |
| 0-1 | 55 |
1981 |
Gausdal Int | B94 Sicilian, Najdorf |
| 4. E Ipek Yilmaz vs M Wiedenkeller |
| 0-1 | 40 |
1981 |
EU-ch jr | A25 English |
| 5. M Lanzani vs M Wiedenkeller |
| 0-1 | 35 |
1981 |
EU-ch jr | C04 French, Tarrasch, Guimard Main line |
| 6. M Condie vs M Wiedenkeller |
| ½-½ | 46 |
1981 |
EU-ch jr | C77 Ruy Lopez |
| 7. M Wiedenkeller vs A Greenfeld |
| ½-½ | 46 |
1981 |
EU-ch jr | B83 Sicilian |
| 8. P Pandavos vs M Wiedenkeller |
| 1-0 | 41 |
1981 |
EU-ch jr | C00 French Defense |
| 9. M Wiedenkeller vs A Sokolov |
| ½-½ | 40 |
1981 |
EU-ch jr | B83 Sicilian |
| 10. M Wiedenkeller vs F Berend |
| 1-0 | 44 |
1981 |
EU-ch jr | B90 Sicilian, Najdorf |
| 11. M Wiedenkeller vs J A Corral Blanco |
| ½-½ | 18 |
1981 |
EU-ch jr | B89 Sicilian |
| 12. J M Hodgson vs M Wiedenkeller |
| 0-1 | 52 |
1981 |
EU-ch jr | C00 French Defense |
| 13. M Wiedenkeller vs H Kuijf |
| ½-½ | 77 |
1981 |
EU-ch jr | B83 Sicilian |
| 14. M Wiedenkeller vs C Hansen |
 | 0-1 | 39 |
1981 |
EU-ch jr | B03 Alekhine's Defense |
| 15. M Wiedenkeller vs G Siegel |
| 1-0 | 48 |
1981 |
EU-ch jr | B03 Alekhine's Defense |
| 16. I Ceschia vs M Wiedenkeller |
| 1-0 | 23 |
1982 |
Reggio Emilia 8283 | C04 French, Tarrasch, Guimard Main line |
| 17. K Mokry vs M Wiedenkeller |
| ½-½ | 55 |
1982 |
Reggio Emilia 8283 | C75 Ruy Lopez, Modern Steinitz Defense |
| 18. H Nishimura vs M Wiedenkeller |
| 0-1 | 12 |
1982 |
Copenhagen | C02 French, Advance |
| 19. M Wiedenkeller vs H Rothen |
| 1-0 | 43 |
1983 |
Eksjo 11th | A71 Benoni, Classical, 8.Bg5 |
| 20. M Wiedenkeller vs A J Mestel |
| 0-1 | 40 |
1984 |
Esbjerg | A48 King's Indian |
| 21. Csom vs M Wiedenkeller |
| 1-0 | 50 |
1984 |
Esbjerg | A15 English |
| 22. Short vs M Wiedenkeller |
| 0-1 | 40 |
1984 |
Esbjerg | B40 Sicilian |
| 23. M Wiedenkeller vs Miles |
| ½-½ | 59 |
1984 |
Esbjerg | A47 Queen's Indian |
| 24. Glek vs M Wiedenkeller |
 | 1-0 | 47 |
1985 |
Prag | B40 Sicilian |
| 25. J Lechtynsky vs M Wiedenkeller |
| ½-½ | 29 |
1985 |
Prague op | D91 Grunfeld, 5.Bg5 |