| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. M Pavlovic vs J Hartung-Nielsen |
| 1-0 | 26 | 1985 | Politiken Cup | E06 Catalan, Closed, 5.Nf3 |
| 52. J Hartung-Nielsen vs S Clausen |
| ½-½ | 16 | 1985 | Politiken Cup | D27 Queen's Gambit Accepted, Classical |
| 53. K Bjerring vs J Hartung-Nielsen |
| 1-0 | 51 | 1985 | Politiken Cup | B76 Sicilian, Dragon, Yugoslav Attack |
| 54. J Hartung-Nielsen vs E Gausel |
| 0-1 | 72 | 1985 | Politiken Cup | D07 Queen's Gambit Declined, Chigorin Defense |
| 55. S Bjarnason vs J Hartung-Nielsen |
| 0-1 | 68 | 1985 | Politiken Cup | D43 Queen's Gambit Declined Semi-Slav |
| 56. J Hartung-Nielsen vs Z Bator |
| 1-0 | 13 | 1985 | Politiken Cup | D31 Queen's Gambit Declined |
| 57. J Hartung-Nielsen vs P Kamaras |
| ½-½ | 19 | 1985 | Politiken Cup | A80 Dutch |
| 58. J Norgaard vs J Hartung-Nielsen |
| 1-0 | 32 | 1985 | Politiken Cup | B72 Sicilian, Dragon |
| 59. J Hartung-Nielsen vs S M Riis |
| ½-½ | 13 | 1986 | Copenhagen Open | A46 Queen's Pawn Game |
| 60. H Holmsgaard vs J Hartung-Nielsen |
| ½-½ | 15 | 1986 | Copenhagen Open | D32 Queen's Gambit Declined, Tarrasch |
| 61. J Hartung-Nielsen vs M Kaspersen |
| ½-½ | 11 | 1986 | Copenhagen Open | D10 Queen's Gambit Declined Slav |
| 62. J W Knudsen vs J Hartung-Nielsen |
| ½-½ | 34 | 1986 | Copenhagen Open | A06 Reti Opening |
| 63. B Ostenstad vs J Hartung-Nielsen |
| 1-0 | 17 | 1986 | Copenhagen Open | D09 Queen's Gambit Declined, Albin Counter Gambit, 5.g3 |
| 64. J Hartung-Nielsen vs S Clausen |
| 1-0 | 40 | 1986 | Copenhagen Open | D05 Queen's Pawn Game |
| 65. M Fette vs J Hartung-Nielsen |
| 1-0 | 36 | 1986 | Copenhagen Open | B30 Sicilian |
| 66. J Hartung-Nielsen vs T Horvath |
| 0-1 | 51 | 1986 | Copenhagen Open | A40 Queen's Pawn Game |
| 67. H Sorensen vs J Hartung-Nielsen |
| 0-1 | 41 | 1986 | Copenhagen Open | D02 Queen's Pawn Game |
| 68. P Sinkovics vs J Hartung-Nielsen |
| ½-½ | 24 | 1986 | Copenhagen Open | D33 Queen's Gambit Declined, Tarrasch |
| 69. J Hartung-Nielsen vs L Schandorff |
| 0-1 | 54 | 1988 | Copenhagen Open | A16 English |
| 70. R Callergard vs J Hartung-Nielsen |
| 1-0 | 45 | 1988 | Copenhagen Open | D30 Queen's Gambit Declined |
| 71. N H Willumsen vs J Hartung-Nielsen |
| 1-0 | 27 | 1988 | Copenhagen Open | B40 Sicilian |
| 72. J Hartung-Nielsen vs M Kaspersen |
| ½-½ | 18 | 1988 | Copenhagen Open | A87 Dutch, Leningrad, Main Variation |
| 73. K V Andersen vs J Hartung-Nielsen |
| ½-½ | 61 | 1988 | Copenhagen Open | B45 Sicilian, Taimanov |
| 74. S Clausen vs J Hartung-Nielsen |
| ½-½ | 30 | 1988 | Copenhagen Open | A36 English |
| 75. J Hartung-Nielsen vs P Sinkovics |
| ½-½ | 47 | 1988 | Copenhagen Open | E94 King's Indian, Orthodox |
Kibitzing
