| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. J Brink vs J R Markus |
 | 0-1 | 43 |
1987 |
corres NLD | C33 King's Gambit Accepted |
| 2. Laarhoven vs J R Markus |
| 1-0 | 33 |
1988 |
corres NLD | C34 King's Gambit Accepted |
| 3. J R Markus vs J de Vries |
| 1-0 | 34 |
1989 |
corr NL ch 17 | C05 French, Tarrasch |
| 4. J R Markus vs P Kuijsten |
| ½-½ | 29 |
1989 |
corr NL ch 17 | C07 French, Tarrasch |
| 5. L Compagnie vs J R Markus |
| ½-½ | 49 |
1989 |
corr NL ch 17 | C95 Ruy Lopez, Closed, Breyer |
| 6. J R Markus vs J Schot |
| 1-0 | 72 |
1989 |
corr NL ch 17 | B07 Pirc |
| 7. J R Markus vs D Langerak |
| 0-1 | 57 |
1989 |
corr NL ch 17 | B80 Sicilian, Scheveningen |
| 8. R de Boer vs J R Markus |
| ½-½ | 35 |
1989 |
corr NL ch 17 | A57 Benko Gambit |
| 9. J R Markus vs A W De Visser |
| 1-0 | 27 |
1989 |
corr NL ch 17 | C42 Petrov Defense |
| 10. C P Gouw vs J R Markus |
| ½-½ | 61 |
1989 |
corr NL ch 17 | A57 Benko Gambit |
| 11. R Thierry vs J R Markus |
| ½-½ | 57 |
1989 |
corr NL ch 17 | C92 Ruy Lopez, Closed |
| 12. J R Markus vs J Schellingerhout |
 | 1-0 | 36 |
1989 |
corr NL ch 17 | B96 Sicilian, Najdorf |
| 13. H Galje vs J R Markus |
| 1-0 | 44 |
1989 |
corr NL ch 17 | A57 Benko Gambit |
| 14. W Terpstra vs J R Markus |
| 0-1 | 28 |
1989 |
corr NL ch 17 | A46 Queen's Pawn Game |
| 15. J R Markus vs J Prins |
| ½-½ | 52 |
1989 |
corr NL ch 17 | B03 Alekhine's Defense |
| 16. M Etmans vs J R Markus |
| 0-1 | 53 |
1989 |
corr NL ch 17 | C77 Ruy Lopez |
| 17. G Dorenberg vs J R Markus |
| 1-0 | 41 |
1990 |
Dieren | C36 King's Gambit Accepted, Abbazia Defense |
| 18. J M Vaassen vs J R Markus |
| ½-½ | 39 |
1991 |
corres NLD | C36 King's Gambit Accepted, Abbazia Defense |
| 19. A Blees vs J R Markus |
 | 1-0 | 31 |
1991 |
It (open) | C55 Two Knights Defense |
| 20. L Kotan vs J R Markus |
| 1-0 | 59 |
1991 |
It (open) | C55 Two Knights Defense |
| 21. J R Markus vs Zsofia Polgar |
| 0-1 | 27 |
1995 |
Memorial Donner (open), Amsterdam (Netherlands) | A57 Benko Gambit |
| 22. A Van Brussel vs J R Markus |
| 0-1 | 22 |
1996 |
It open | C30 King's Gambit Declined |
| 23. D Norwood vs J R Markus |
| 1-0 | 29 |
1996 |
Donner op, Amsterdam NED | D34 Queen's Gambit Declined, Tarrasch |
| 24. A Boer vs J R Markus |
| ½-½ | 27 |
1998 |
Dutch Open | C34 King's Gambit Accepted |
| 25. A Meijere vs J R Markus |
| 1-0 | 56 |
2000 |
open | C55 Two Knights Defense |