| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. J Voormans vs J R Markus |
| 1-0 | 41 | 1989 | Dutch Open | C93 Ruy Lopez, Closed, Smyslov Defense |
| 27. J R Markus vs R Geisler |
| 1-0 | 33 | 1989 | Dutch Open | B76 Sicilian, Dragon, Yugoslav Attack |
| 28. J R Markus vs N Curien |
| 0-1 | 20 | 1990 | Bad Ragaz Open | C05 French, Tarrasch |
| 29. J R Markus vs F Aschwanden |
| 0-1 | 37 | 1990 | Bad Ragaz Open | B06 Robatsch |
| 30. H Suri vs J R Markus |
| 1-0 | 35 | 1990 | Bad Ragaz Open | C92 Ruy Lopez, Closed |
| 31. M Hirt vs J R Markus |
| 0-1 | 56 | 1990 | Bad Ragaz Open | C55 Two Knights Defense |
| 32. K Ninov vs J R Markus |
| 1-0 | 43 | 1990 | Dutch Open | A15 English |
| 33. J R Markus vs A van der Weij |
| ½-½ | 30 | 1990 | Dutch Open | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 34. J R Markus vs N Ristic |
| 0-1 | 40 | 1990 | Dutch Open | B43 Sicilian, Kan, 5.Nc3 |
| 35. G Dorenberg vs J R Markus |
| 1-0 | 41 | 1990 | Dutch Open | C36 King's Gambit Accepted, Abbazia Defense |
| 36. B den Boer vs J R Markus |
| 1-0 | 41 | 1990 | Dutch Open | A57 Benko Gambit |
| 37. J R Markus vs J Bosch |
| 0-1 | 42 | 1990 | Dutch Open | A46 Queen's Pawn Game |
| 38. O Wilgenhof vs J R Markus |
| 0-1 | 59 | 1990 | Dutch Open | A45 Queen's Pawn Game |
| 39. J R Markus vs S van Gisbergen |
| 0-1 | 39 | 1990 | Dutch Open | C91 Ruy Lopez, Closed |
| 40. J R Markus vs M Jonker |
| 0-1 | 42 | 1990 | Dutch Open | B07 Pirc |
| 41. J Vaassen vs J R Markus |
| ½-½ | 39 | 1991 | NED corr | C36 King's Gambit Accepted, Abbazia Defense |
| 42. L Kotan vs J R Markus |
| 1-0 | 59 | 1991 | Bad Ragaz op | C55 Two Knights Defense |
| 43. A Blees vs J R Markus |
 | 1-0 | 31 | 1991 | Bussum Open | C55 Two Knights Defense |
| 44. J R Markus vs Axel Wunsch |
| 1-0 | 70 | 1991 | Dutch Open | B07 Pirc |
| 45. J Borst vs J R Markus |
| ½-½ | 59 | 1991 | Dutch Open | D11 Queen's Gambit Declined Slav |
| 46. J R Markus vs R Vedder |
| ½-½ | 48 | 1991 | Dutch Open | C05 French, Tarrasch |
| 47. R Sijbesma vs J R Markus |
| ½-½ | 42 | 1991 | Dutch Open | D10 Queen's Gambit Declined Slav |
| 48. J R Markus vs Mephisto Lyon |
| 0-1 | 57 | 1991 | Dutch Open | D25 Queen's Gambit Accepted |
| 49. O Wilgenhof vs J R Markus |
| 1-0 | 37 | 1991 | Dutch Open | D44 Queen's Gambit Declined Semi-Slav |
| 50. J Fober vs J R Markus |
| 1-0 | 26 | 1991 | Dutch Open | D49 Queen's Gambit Declined Semi-Slav, Meran |
Kibitzing
