| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. Korchnoi vs A Ornstein |
 | ½-½ | 50 | 1972 | Skopje Olympiad Final-A | E67 King's Indian, Fianchetto |
| 52. B Malich vs A Ornstein |
| 1-0 | 73 | 1972 | Skopje Olympiad Final-A | D32 Queen's Gambit Declined, Tarrasch |
| 53. H Ree vs A Ornstein |
| 1-0 | 27 | 1972 | Skopje Olympiad Final-A | E92 King's Indian |
| 54. A Ornstein vs Smejkal |
| 0-1 | 37 | 1972 | Skopje Olympiad Final-A | D71 Neo-Grunfeld |
| 55. A Ornstein vs J Sloth |
| ½-½ | 40 | 1972 | Skopje Olympiad Final-A | B14 Caro-Kann, Panov-Botvinnik Attack |
| 56. Ljubojevic vs A Ornstein |
| ½-½ | 24 | 1972 | Skopje Olympiad Final-A | C71 Ruy Lopez |
| 57. A Ornstein vs Romanishin |
| 0-1 | 41 | 1972 | European Junior Championship Preliminary | C96 Ruy Lopez, Closed |
| 58. D J Findlay vs A Ornstein |
| 1-0 | 41 | 1972 | European Junior Championship Preliminary | B46 Sicilian, Taimanov Variation |
| 59. A Ornstein vs T Knight |
| 0-1 | 15 | 1972 | European Junior Championship Preliminary | B06 Robatsch |
| 60. F Cassar vs A Ornstein |
| 0-1 | 17 | 1972 | European Junior Championship Preliminary | A45 Queen's Pawn Game |
| 61. A Ornstein vs A Hellmayr |
| 1-0 | 41 | 1972 | European Junior Championship Preliminary | A00 Uncommon Opening |
| 62. P Spacek vs A Ornstein |
| 1-0 | 34 | 1972 | European Junior Championship Preliminary | D83 Grunfeld, Grunfeld Gambit |
| 63. A Ipek vs A Ornstein |
| 0-1 | 34 | 1972 | European Junior Championship Preliminary | B25 Sicilian, Closed |
| 64. A Ornstein vs P Helmertz |
| 1-0 | 35 | 1973 | SWE-ch | A12 English with b3 |
| 65. A Ornstein vs A Fridh |
| 1-0 | 27 | 1973 | SWE-ch | A35 English, Symmetrical |
| 66. B Jansson vs A Ornstein |
| 0-1 | 42 | 1973 | SWE-ch | B08 Pirc, Classical |
| 67. B Ekenberg vs A Ornstein |
| 0-1 | 49 | 1973 | SWE-ch | A02 Bird's Opening |
| 68. F Nordstrom vs A Ornstein |
| 1-0 | 32 | 1973 | SWE-ch | A34 English, Symmetrical |
| 69. A Ornstein vs O Kinnmark |
| ½-½ | 8 | 1973 | SWE-ch | C32 King's Gambit Declined, Falkbeer Counter Gambit |
| 70. L Ljungquist vs A Ornstein |
| 0-1 | 42 | 1973 | SWE-ch | A33 English, Symmetrical |
| 71. L Liljedahl vs A Ornstein |
| ½-½ | 9 | 1973 | SWE-ch | A10 English |
| 72. A Ornstein vs A Werle |
| 1-0 | 39 | 1973 | SWE-ch | A13 English |
| 73. A Ornstein vs R Lekander |
| 0-1 | 39 | 1973 | SWE-ch | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
| 74. J Ljungdahl vs A Ornstein |
| 0-1 | 71 | 1973 | SWE-ch | A37 English, Symmetrical |
| 75. A Ornstein vs D Hansson |
| 1-0 | 16 | 1973 | SWE-ch | D92 Grunfeld, 5.Bf4 |
Kibitzing
