| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Hebden vs M Olesen |
| 1-0 | 41 |
1989 |
It-B | A43 Old Benoni |
| 2. Szabo vs M Olesen |
| 1-0 | 35 |
1991 |
Budapest | C15 French, Winawer |
| 3. M Olesen vs Khmelnitsky |
| 1-0 | 29 |
1991 |
Copenhagen (Denmark) | D05 Queen's Pawn Game |
| 4. Igor Ivanov vs M Olesen |
| 1-0 | 41 |
1992 |
Chicago | A31 English, Symmetrical, Benoni Formation |
| 5. M Olesen vs K Shirazi |
| 1-0 | 20 |
1992 |
Chicago (USA) | D05 Queen's Pawn Game |
| 6. Igor Ivanov vs M Olesen |
| 1-0 | 52 |
1992 |
Philadelphia World op | E92 King's Indian |
| 7. J Bonin vs M Olesen |
| 1-0 | 44 |
1992 |
Philadelphia World | E97 King's Indian |
| 8. M Olesen vs P Moulin |
| 1-0 | 33 |
1993 |
New York Marshall CC | A30 English, Symmetrical |
| 9. A J Whiteley vs M Olesen |
| 1-0 | 35 |
1994 |
London2 | E67 King's Indian, Fianchetto |
| 10. Yermolinsky vs M Olesen |
| 1-0 | 29 |
1994 |
It (open) | A15 English |
| 11. D Gurevich vs M Olesen |
| 1-0 | 45 |
1994 |
It (open) | E60 King's Indian Defense |
| 12. Shabalov vs M Olesen |
| 1-0 | 32 |
1994 |
It (open) | C25 Vienna |
| 13. Emms vs M Olesen |
| 1-0 | 35 |
1995 |
Hillerod Politiken | C26 Vienna |
| 14. M Olesen vs H A Gretarsson |
| 1-0 | 33 |
1995 |
1 | C31 King's Gambit Declined, Falkbeer Counter Gambit |
| 15. DeFirmian vs M Olesen |
| 1-0 | 23 |
1995 |
Gausdal (Norway) | B70 Sicilian, Dragon Variation |
| 16. M Olesen vs J Hvenekilde |
| 1-0 | 53 |
1996 |
Ch City | C34 King's Gambit Accepted |
| 17. K Visweswaran vs M Olesen |
| 1-0 | 31 |
2001 |
Politiken Cup | B43 Sicilian, Kan, 5.Nc3 |
| 18. J Rendboe vs M Olesen |
| 1-0 | 38 |
2001 |
Politiken Cup | A43 Old Benoni |
| 19. M Olesen vs N Nielsen |
| 1-0 | 36 |
2001 |
Politiken Cup | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
