Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. M Wittwer vs J Vokoun |
| 1-0 | 33 | 1981 | Biel MTO Open | B40 Sicilian |
2. E Ungureanu vs M Wittwer |
| 1-0 | 39 | 1981 | Biel MTO Open | D18 Queen's Gambit Declined Slav, Dutch |
3. L Lengyel vs M Wittwer |
| 0-1 | 34 | 1981 | Biel MTO Open | C10 French |
4. R Douven vs M Wittwer |
| 1-0 | 32 | 1981 | Biel MTO Open | D78 Neo-Grunfeld, 6.O-O c6 |
5. Y Afek vs M Wittwer |
| 1-0 | 30 | 1981 | Biel MTO Open | C42 Petrov Defense |
6. M Wittwer vs Hodgson |
| 0-1 | 32 | 1981 | World Youth U26 Team Championship | A07 King's Indian Attack |
7. M Wittwer vs A El-Othman |
| 1-0 | 46 | 1981 | World Youth U26 Team Championship | C44 King's Pawn Game |
8. M Wittwer vs O Brekke |
| 1-0 | 72 | 1981 | World Youth U26 Team Championship | A07 King's Indian Attack |
9. C Braga vs M Wittwer |
| 0-1 | 55 | 1981 | World Youth U26 Team Championship | C42 Petrov Defense |
10. M Wittwer vs D Sellos |
| 0-1 | 66 | 1981 | World Youth U26 Team Championship | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
11. M Wittwer vs B Filipovic |
| 1-0 | 40 | 1981 | World Youth U26 Team Championship | A48 King's Indian |
12. M Wittwer vs D Gurevich |
| 1-0 | 40 | 1981 | World Youth U26 Team Championship | D02 Queen's Pawn Game |
13. M Wittwer vs M Condie |
| 1-0 | 61 | 1981 | World Youth U26 Team Championship | B86 Sicilian, Fischer-Sozin Attack |
14. M Wittwer vs E Gigerl |
| ½-½ | 33 | 1981 | World Youth U26 Team Championship | A45 Queen's Pawn Game |
15. M Wittwer vs J Reust |
| 1-0 | 28 | 1982 | Zuerich op-A 06th | B06 Robatsch |
16. M Wittwer vs D Bernstein |
| ½-½ | 57 | 1982 | EUchT qual | A88 Dutch, Leningrad, Main Variation with c6 |
17. R Lau vs M Wittwer |
| ½-½ | 17 | 1982 | EUchT qual | C42 Petrov Defense |
18. M Wittwer vs Y Bleiman |
| ½-½ | 23 | 1982 | EUchT qual | A46 Queen's Pawn Game |
19. S Kindermann vs M Wittwer |
| 1-0 | 39 | 1982 | EUchT qual | C53 Giuoco Piano |
20. M Wittwer vs S Wagman |
| 1-0 | 20 | 1983 | Lugano Open | B77 Sicilian, Dragon, Yugoslav Attack |
21. S Branca vs M Wittwer |
 | 1-0 | 27 | 1983 | Lugano Open | B86 Sicilian, Fischer-Sozin Attack |
22. L Kwatschewsky vs M Wittwer |
| 1-0 | 57 | 1983 | Mitropa Cup | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
23. R Schiltz vs M Wittwer |
| 0-1 | 33 | 1983 | Mitropa Cup | C45 Scotch Game |
24. M Wittwer vs F Meinsohn |
| 0-1 | 40 | 1983 | Mitropa Cup | B46 Sicilian, Taimanov Variation |
25. G Dizdar vs M Wittwer |
| ½-½ | 29 | 1983 | Mitropa Cup | D02 Queen's Pawn Game |