Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. J R Markus vs K Langeweg |
| 0-1 | 40 | 1984 | Dutch Open | A07 King's Indian Attack |
2. J R Markus vs P Kuijsten |
| ½-½ | 29 | 1987 | Dutch Correspondence Championship 1987/90 | C07 French, Tarrasch |
3. R de Boer vs J R Markus |
| ½-½ | 35 | 1987 | Dutch Correspondence Championship 1987/90 | A57 Benko Gambit |
4. R Thierry vs J R Markus |
| ½-½ | 57 | 1987 | Dutch Correspondence Championship 1987/90 | C92 Ruy Lopez, Closed |
5. W Terpstra vs J R Markus |
| 0-1 | 28 | 1987 | Dutch Correspondence Championship 1987/90 | A46 Queen's Pawn Game |
6. J R Markus vs J de Vries |
| 1-0 | 34 | 1987 | Dutch Correspondence Championship 1987/90 | C05 French, Tarrasch |
7. J R Markus vs J Schot |
| 1-0 | 72 | 1987 | Dutch Correspondence Championship 1987/90 | B07 Pirc |
8. J R Markus vs A de Visser |
| 1-0 | 27 | 1987 | Dutch Correspondence Championship 1987/90 | C42 Petrov Defense |
9. J R Markus vs J Schellingerhout |
 | 1-0 | 36 | 1987 | Dutch Correspondence Championship 1987/90 | B96 Sicilian, Najdorf |
10. J R Markus vs J Alingh Prins |
| ½-½ | 52 | 1987 | Dutch Correspondence Championship 1987/90 | B03 Alekhine's Defense |
11. J R Markus vs D Langerak |
| 0-1 | 57 | 1987 | Dutch Correspondence Championship 1987/90 | B80 Sicilian, Scheveningen |
12. C Gouw vs J R Markus |
| ½-½ | 61 | 1987 | Dutch Correspondence Championship 1987/90 | A57 Benko Gambit |
13. H Galje vs J R Markus |
| 1-0 | 44 | 1987 | Dutch Correspondence Championship 1987/90 | A57 Benko Gambit |
14. M Etmans vs J R Markus |
| 0-1 | 53 | 1987 | Dutch Correspondence Championship 1987/90 | C77 Ruy Lopez |
15. L Compagnie vs J R Markus |
| ½-½ | 49 | 1987 | Dutch Correspondence Championship 1987/90 | C95 Ruy Lopez, Closed, Breyer |
16. J Brink vs J R Markus |
 | 0-1 | 43 | 1987 | NED corr | C33 King's Gambit Accepted |
17. M Laarhoven vs J R Markus |
| 1-0 | 33 | 1988 | NED corr | C34 King's Gambit Accepted |
18. J R Markus vs G Welling |
| 0-1 | 35 | 1988 | Bussum Open | B00 Uncommon King's Pawn Opening |
19. L Riemersma vs J R Markus |
| 1-0 | 34 | 1989 | Dutch Open | C91 Ruy Lopez, Closed |
20. J van Mil vs J R Markus |
| 1-0 | 24 | 1989 | Dutch Open | A46 Queen's Pawn Game |
21. J R Markus vs P Bierenbroodspot |
| ½-½ | 18 | 1989 | Dutch Open | C47 Four Knights |
22. M Beulen vs J R Markus |
| ½-½ | 13 | 1989 | Dutch Open | C84 Ruy Lopez, Closed |
23. J R Markus vs R Atlas |
| 0-1 | 41 | 1989 | Dutch Open | C05 French, Tarrasch |
24. M van der Linde vs J R Markus |
| 1-0 | 29 | 1989 | Dutch Open | A30 English, Symmetrical |
25. J R Markus vs M Forster |
| ½-½ | 42 | 1989 | Dutch Open | C07 French, Tarrasch |