| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. J G Nielsen vs C Hoi |
| ½-½ | 22 | 1980 | Danish Championship | B06 Robatsch |
| 27. E Mortensen vs J G Nielsen |
| ½-½ | 30 | 1980 | Danish Championship | A22 English |
| 28. J G Nielsen vs E Pedersen |
| ½-½ | 16 | 1980 | Danish Championship | B12 Caro-Kann Defense |
| 29. J G Nielsen vs S Fedder |
| ½-½ | 19 | 1980 | Danish Championship | B50 Sicilian |
| 30. J Ost-Hansen vs J G Nielsen |
| 1-0 | 36 | 1980 | Danish Championship | A00 Uncommon Opening |
| 31. J G Nielsen vs E Brondum |
| ½-½ | 13 | 1980 | Danish Championship | B29 Sicilian, Nimzovich-Rubinstein |
| 32. O Jakobsen vs J G Nielsen |
| 1-0 | 30 | 1980 | Danish Championship | D41 Queen's Gambit Declined, Semi-Tarrasch |
| 33. J G Nielsen vs B Brinck-Claussen |
| ½-½ | 41 | 1980 | Danish Championship | A07 King's Indian Attack |
| 34. B Barth Sahl vs J G Nielsen |
| 0-1 | 34 | 1980 | Danish Championship | A06 Reti Opening |
| 35. J G Nielsen vs J Kristiansen |
| 0-1 | 73 | 1980 | Danish Championship | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 36. J Rodgaard vs J G Nielsen |
| 1-0 | 39 | 1980 | Danish Championship | D41 Queen's Gambit Declined, Semi-Tarrasch |
| 37. V McCambridge vs J G Nielsen |
| ½-½ | 26 | 1981 | Copenhagen Open | A07 King's Indian Attack |
| 38. C Hansen vs J G Nielsen |
| 1-0 | 41 | 1981 | Copenhagen Open | C27 Vienna Game |
| 39. J G Nielsen vs K J Wicker |
 | 1-0 | 41 | 1981 | Copenhagen Open | C00 French Defense |
| 40. L D Evans vs J G Nielsen |
| ½-½ | 45 | 1981 | Copenhagen Open | C41 Philidor Defense |
| 41. J G Nielsen vs M Moe |
| ½-½ | 40 | 1981 | Copenhagen Open | B31 Sicilian, Rossolimo Variation |
| 42. V Ravikumar vs J G Nielsen |
| 1-0 | 35 | 1981 | Copenhagen Open | A89 Dutch, Leningrad, Main Variation with Nc6 |
| 43. J G Nielsen vs Plaskett |
| 0-1 | 23 | 1981 | Copenhagen Open | B50 Sicilian |
| 44. J G Nielsen vs G Iskov |
| 0-1 | 23 | 1985 | Politiken Cup | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 45. C Hartman vs J G Nielsen |
| 0-1 | 35 | 1985 | Politiken Cup | C41 Philidor Defense |
| 46. J G Nielsen vs M Pavlovic |
| 1-0 | 37 | 1985 | Politiken Cup | A31 English, Symmetrical, Benoni Formation |
| 47. L Pliester vs J G Nielsen |
| 1-0 | 35 | 1985 | Politiken Cup | A10 English |
| 48. J G Nielsen vs J Norgaard |
| ½-½ | 17 | 1985 | Politiken Cup | E86 King's Indian, Samisch, Orthodox, 7.Nge2 c6 |
| 49. T Sorensen vs J G Nielsen |
| ½-½ | 24 | 1985 | Politiken Cup | C83 Ruy Lopez, Open |
| 50. J G Nielsen vs E Heyken |
| ½-½ | 56 | 1985 | Politiken Cup | E46 Nimzo-Indian |
Kibitzing
