Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. D L Henry vs A Ornstein |
| 0-1 | 41 | 1968 | EU-ch U20 | E62 King's Indian, Fianchetto |
2. R G Eales vs A Ornstein |
| ½-½ | 21 | 1968 | EU-ch U20 | E63 King's Indian, Fianchetto, Panno Variation |
3. A Ornstein vs Westerinen |
| 0-1 | 35 | 1971 | Stockholm op | C73 Ruy Lopez, Modern Steinitz Defense |
4. A Ornstein vs H Ek |
| 1-0 | 41 | 1972 | SWE-ch | C07 French, Tarrasch |
5. A Ornstein vs O Kinnmark |
| 1-0 | 48 | 1972 | SWE-ch | A17 English |
6. A Ornstein vs W Keller |
| 1-0 | 62 | 1972 | EU-ch U20 fin-C | A14 English |
7. M Wahlbom vs A Ornstein |
| ½-½ | 60 | 1972 | SWE-ch | A39 English, Symmetrical, Main line with d4 |
8. A Ornstein vs F Nordstrom |
| ½-½ | 12 | 1972 | SWE-ch | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
9. A Ornstein vs B Jansson |
| 1-0 | 73 | 1972 | SWE-ch | A04 Reti Opening |
10. A Fridh vs A Ornstein |
| 0-1 | 37 | 1972 | SWE-ch | D74 Neo-Grunfeld, 6.cd Nxd5, 7.O-O |
11. A Ornstein vs G Sigurjonsson |
| 0-1 | 67 | 1972 | WchT U26 19th fin-B | B06 Robatsch |
12. D Hansson vs A Ornstein |
| 0-1 | 40 | 1972 | SWE-ch | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
13. S Cvetkovic vs A Ornstein |
| 1-0 | 47 | 1972 | WchT U26 19th fin-B | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
14. A Ornstein vs G Brostrom |
| 1-0 | 54 | 1972 | SWE-ch | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
15. A Ornstein vs T Stefansson |
 | 1-0 | 25 | 1972 | EU-ch U20 fin-C | E66 King's Indian, Fianchetto, Yugoslav Panno |
16. H Akvist vs A Ornstein |
| ½-½ | 41 | 1972 | SWE-ch | C91 Ruy Lopez, Closed |
17. A Ornstein vs L Liljedahl |
| ½-½ | 42 | 1972 | SWE-ch | B05 Alekhine's Defense, Modern |
18. J Eslon vs A Ornstein |
| 0-1 | 38 | 1972 | SWE-ch | B43 Sicilian, Kan, 5.Nc3 |
19. A Ornstein vs G Sperber |
| 1-0 | 26 | 1972 | SWE-ch | B57 Sicilian |
20. E Raaste vs A Ornstein |
| 0-1 | 29 | 1972 | WchT U26 19th fin-B | A01 Nimzovich-Larsen Attack |
21. D Uddenfeldt vs A Ornstein |
| ½-½ | 61 | 1972 | SWE-ch | E80 King's Indian, Samisch Variation |
22. S Heim vs A Ornstein |
| 0-1 | 27 | 1972 | WchT U26 19th fin-B | C45 Scotch Game |
23. A J van Dop vs A Ornstein |
| ½-½ | 79 | 1972 | WchT U26 19th fin-B | B42 Sicilian, Kan |
24. A Olsson vs A Ornstein |
| ½-½ | 73 | 1972 | SWE-ch | C45 Scotch Game |
25. R Lekander vs A Ornstein |
| 1-0 | 41 | 1972 | SWE-ch | D86 Grunfeld, Exchange |