| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. J Ost-Hansen vs A Poulsen |
| 1-0 | 48 | 1972 | Danish Championship | A07 King's Indian Attack |
| 27. J Ost-Hansen vs B Ivanovic |
| 1-0 | 31 | 1972 | World Student Team Championship qual-3 | A00 Uncommon Opening |
| 28. J Pichardo vs J Ost-Hansen |
| 0-1 | 41 | 1974 | World Student Team Championship qual-4 | A01 Nimzovich-Larsen Attack |
| 29. J Ost-Hansen vs J Diaz |
| ½-½ | 58 | 1974 | World Student Team Championship qual-4 | A07 King's Indian Attack |
| 30. J Ost-Hansen vs M Babula |
| 0-1 | 41 | 1974 | World Student Team Championship qual-4 | A06 Reti Opening |
| 31. C Quigley vs J Ost-Hansen |
| 0-1 | 26 | 1974 | World Student Team Championship qual-4 | C95 Ruy Lopez, Closed, Breyer |
| 32. J Ost-Hansen vs Z Beil |
| 1-0 | 31 | 1974 | World Student Team Championship Final-A | A07 King's Indian Attack |
| 33. T Ristoja vs J Ost-Hansen |
| 0-1 | 39 | 1974 | World Student Team Championship Final-A | B42 Sicilian, Kan |
| 34. P Boersma vs J Ost-Hansen |
| 0-1 | 39 | 1974 | World Student Team Championship Final-A | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 35. J Ost-Hansen vs Nunn |
  | 0-1 | 38 | 1974 | World Student Team Championship Final-A | C27 Vienna Game |
| 36. R Ervin vs J Ost-Hansen |
| ½-½ | 21 | 1974 | World Student Team Championship Final-A | B42 Sicilian, Kan |
| 37. T Horvath vs J Ost-Hansen |
| 1-0 | 39 | 1974 | World Student Team Championship Final-A | B17 Caro-Kann, Steinitz Variation |
| 38. J Ost-Hansen vs S Buchal |
| ½-½ | 14 | 1974 | World Student Team Championship Final-A | A07 King's Indian Attack |
| 39. J Ost-Hansen vs R Freitag |
| 1-0 | 36 | 1974 | World Student Team Championship Final-A | A00 Uncommon Opening |
| 40. R Milovanovic vs J Ost-Hansen |
| 0-1 | 44 | 1974 | Winterthur Juniors | B17 Caro-Kann, Steinitz Variation |
| 41. L Sanghed vs J Ost-Hansen |
| ½-½ | 37 | 1974 | Winterthur Juniors | C95 Ruy Lopez, Closed, Breyer |
| 42. J Ost-Hansen vs K Podzielny |
| 1-0 | 47 | 1974 | Winterthur Juniors | A00 Uncommon Opening |
| 43. J Ost-Hansen vs H Schoch |
| 1-0 | 47 | 1974 | Winterthur Juniors | A00 Uncommon Opening |
| 44. J Ost-Hansen vs R Borngaesser |
| ½-½ | 39 | 1974 | Winterthur Juniors | A00 Uncommon Opening |
| 45. J Ditzler vs J Ost-Hansen |
| ½-½ | 68 | 1974 | Winterthur Juniors | B43 Sicilian, Kan, 5.Nc3 |
| 46. H Kaenel vs J Ost-Hansen |
| ½-½ | 36 | 1974 | Winterthur Juniors | A04 Reti Opening |
| 47. M Ruefenacht vs J Ost-Hansen |
| 0-1 | 40 | 1974 | Winterthur Juniors | B42 Sicilian, Kan |
| 48. J Ost-Hansen vs R Bellin |
| ½-½ | 29 | 1974 | Winterthur Juniors | B25 Sicilian, Closed |
| 49. J Ost-Hansen vs A Herzog |
| 0-1 | 32 | 1974 | Winterthur Juniors | B25 Sicilian, Closed |
| 50. J Ost-Hansen vs K Loken |
| ½-½ | 66 | 1974 | Winterthur Juniors | A07 King's Indian Attack |
Kibitzing
