| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. A Ornstein vs G Forintos |
| ½-½ | 45 |
1972 |
Skopje ol (Men) | B27 Sicilian |
| 2. A Ornstein vs Smejkal |
| 0-1 | 37 |
1972 |
Skopje ol (Men) fin-A | D71 Neo-Grunfeld |
| 3. A Ornstein vs K Darga |
| 1-0 | 49 |
1972 |
Skopje ol (Men) fin-A | B80 Sicilian, Scheveningen |
| 4. Korchnoi vs A Ornstein |
| ½-½ | 50 |
1972 |
Skopje olm 14/638 | E67 King's Indian, Fianchetto |
| 5. J Kristinsson vs A Ornstein |
| ½-½ | 30 |
1973 |
Ribe 6 Nations chT | A10 English |
| 6. P Poutiainen vs A Ornstein |
| 0-1 | 41 |
1973 |
Ribe 6 Nations chT | A07 King's Indian Attack |
| 7. A Ornstein vs Kunsztowicz |
| 1-0 | 51 |
1973 |
Ribe 6 Nations chT | B68 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 9...Be7 |
| 8. A Ornstein vs Larsen |
 | 0-1 | 35 |
1973 |
Ribe 6 Nations chT | C60 Ruy Lopez |
| 9. A Ornstein vs A Zwaig |
| ½-½ | 23 |
1973 |
Ribe 6 Nations chT | C38 King's Gambit Accepted |
| 10. Tringov vs A Ornstein |
| 1-0 | 39 |
1974 |
Nice ol (Men) fin-A | B84 Sicilian, Scheveningen |
| 11. A Ornstein vs D Cox |
| 1-0 | 26 |
1974 |
W-ch26T | A42 Modern Defense, Averbakh System |
| 12. G James vs A Ornstein |
| ½-½ | 12 |
1974 |
Ol Student's | D80 Grunfeld |
| 13. Pachman vs A Ornstein |
| ½-½ | 51 |
1974 |
Stockholm | D86 Grunfeld, Exchange |
| 14. A Ornstein vs E Torre |
| 0-1 | 44 |
1974 |
Olympiad | E98 King's Indian, Orthodox, Taimanov, 9.Ne1 |
| 15. A Ornstein vs Ljubojevic |
| ½-½ | 23 |
1974 |
Nice (ol) 17/84 (Janosevic,D) | A15 English |
| 16. Minev vs A Ornstein |
| 1-0 | 43 |
1974 |
Rimavska Sobota | A21 English |
| 17. A Ornstein vs Jansa |
| ½-½ | 54 |
1974 |
Nice | D93 Grunfeld, with Bf4 & e3 |
| 18. A Ornstein vs F Blatny |
| 1-0 | 41 |
1974 |
Rimavska Sobota | E12 Queen's Indian |
| 19. G Timoshchenko vs A Ornstein |
| ½-½ | 16 |
1974 |
Rimavska Sobota | C75 Ruy Lopez, Modern Steinitz Defense |
| 20. A Ornstein vs I Asmundsson |
| 1-0 | 32 |
1974 |
Eckernfoerde tt | A81 Dutch |
| 21. A Ornstein vs G Kluger |
| 1-0 | 45 |
1974 |
Rimavska Sobota | C96 Ruy Lopez, Closed |
| 22. Spassky vs A Ornstein |
 | ½-½ | 74 |
1974 |
Nica ol | C34 King's Gambit Accepted |
| 23. A Ornstein vs Ujtelky |
| 1-0 | 53 |
1974 |
Rimavska Sobota | B06 Robatsch |
| 24. E Paoli vs A Ornstein |
| 0-1 | 49 |
1975 |
Eksjo 3th | B84 Sicilian, Scheveningen |
| 25. Ljubojevic vs A Ornstein |
| 1-0 | 47 |
1975 |
Stockholm | B68 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 9...Be7 |