| 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 Bronstein |
| ½-½ | 12 |
1991 |
Copenhagen (Denmark) | A80 Dutch |
| 4. Suba vs M Olesen |
| 0-1 | 36 |
1991 |
Copenhagen Unibank | A15 English |
| 5. M Olesen vs Khmelnitsky |
| 1-0 | 29 |
1991 |
Copenhagen (Denmark) | D05 Queen's Pawn Game |
| 6. M Olesen vs Yermolinsky |
| 0-1 | 40 |
1992 |
Chicago | D05 Queen's Pawn Game |
| 7. M Olesen vs Igor Ivanov |
| ½-½ | 59 |
1992 |
It (open) | E43 Nimzo-Indian, Fischer Variation |
| 8. Igor Ivanov vs M Olesen |
| 1-0 | 41 |
1992 |
Chicago | A31 English, Symmetrical, Benoni Formation |
| 9. Khmelnitsky vs M Olesen |
| 0-1 | 46 |
1992 |
It (open) | B22 Sicilian, Alapin |
| 10. M Olesen vs E Schiller |
| ½-½ | 17 |
1992 |
Kansas City KS | D32 Queen's Gambit Declined, Tarrasch |
| 11. J Bonin vs M Olesen |
| 1-0 | 44 |
1992 |
Philadelphia World | E97 King's Indian |
| 12. M Olesen vs K Shirazi |
| 1-0 | 20 |
1992 |
Chicago (USA) | D05 Queen's Pawn Game |
| 13. Igor Ivanov vs M Olesen |
| 1-0 | 52 |
1992 |
Philadelphia World op | E92 King's Indian |
| 14. M Olesen vs Ashley |
| 0-1 | 28 |
1993 |
It, New York (USA) | A46 Queen's Pawn Game |
| 15. M Olesen vs P Moulin |
| 1-0 | 33 |
1993 |
New York Marshall CC | A30 English, Symmetrical |
| 16. P Truong vs M Olesen |
| 0-1 | 42 |
1993 |
USA-chT Amateur East | A04 Reti Opening |
| 17. Shabalov vs M Olesen |
| 1-0 | 32 |
1994 |
It (open) | C25 Vienna |
| 18. B Parham vs M Olesen |
 | 0-1 | 50 |
1994 |
Chicago op | B01 Scandinavian |
| 19. M Olesen vs Petursson |
| ½-½ | 26 |
1994 |
It | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
| 20. M Olesen vs DeFirmian |
| 0-1 | 55 |
1994 |
It (open) (2) | A46 Queen's Pawn Game |
| 21. D Gurevich vs M Olesen |
| 1-0 | 45 |
1994 |
It (open) | E60 King's Indian Defense |
| 22. Yermolinsky vs M Olesen |
| 1-0 | 29 |
1994 |
It (open) | A15 English |
| 23. M Olesen vs G Welling |
| ½-½ | 10 |
1995 |
Copenhagen 2nd DSDS | A46 Queen's Pawn Game |
| 24. DeFirmian vs M Olesen |
| 1-0 | 23 |
1995 |
Gausdal (Norway) | B70 Sicilian, Dragon Variation |
| 25. M Olesen vs P H Nielsen |
| ½-½ | 14 |
1995 |
It (open), VI-VII, Copenhagen | C35 King's Gambit Accepted, Cunningham |