| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. T Ristoja vs I Hausner |
| ½-½ | 15 | 1969 | Niemeyer Juniors Preliminary | B02 Alekhine's Defense |
| 2. I Hausner vs G Ligterink |
| ½-½ | 24 | 1969 | Niemeyer Juniors Preliminary | B02 Alekhine's Defense |
| 3. B Jacobsen vs I Hausner |
| 1-0 | 26 | 1969 | Niemeyer Juniors Preliminary | A02 Bird's Opening |
| 4. I Hausner vs P G Henry |
| ½-½ | 40 | 1969 | Niemeyer Juniors Preliminary | C47 Four Knights |
| 5. I Hausner vs M Roofthoofd |
| 1-0 | 25 | 1969 | Niemeyer Juniors Preliminary | C15 French, Winawer |
| 6. B Sigurjonsson vs I Hausner |
| 1-0 | 32 | 1969 | Niemeyer Juniors Preliminary | A04 Reti Opening |
| 7. Z Nagrocki vs I Hausner |
| 0-1 | 31 | 1969 | Niemeyer Juniors Preliminary | B02 Alekhine's Defense |
| 8. W Hug vs I Hausner |
| 1-0 | 70 | 1971 | Wch U20 f-A | B53 Sicilian |
| 9. Ribli vs I Hausner |
| 1-0 | 34 | 1971 | Wch U20 f-A | A39 English, Symmetrical, Main line with d4 |
| 10. K Rogoff vs I Hausner |
| 1-0 | 53 | 1971 | Wch U20 f-A | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 11. I Hausner vs L Ogaard |
| 1-0 | 39 | 1971 | Wch U20 f-A | B23 Sicilian, Closed |
| 12. Vaganian vs I Hausner |
| 1-0 | 30 | 1971 | Wch U20 f-A | A67 Benoni, Taimanov Variation |
| 13. I Hausner vs P Poutiainen |
| 1-0 | 23 | 1971 | Wch U20 f-A | B06 Robatsch |
| 14. J Barle vs I Hausner |
| ½-½ | 68 | 1971 | Wch U20 f-A | B77 Sicilian, Dragon, Yugoslav Attack |
| 15. I Hausner vs E Torre |
| ½-½ | 45 | 1971 | Wch U20 f-A | B05 Alekhine's Defense, Modern |
| 16. I Hausner vs N Pinal Borges |
| 1-0 | 61 | 1971 | Wch U20 f-A | C45 Scotch Game |
| 17. R Borngaesser vs I Hausner |
| 1-0 | 35 | 1971 | Wch U20 f-A | B90 Sicilian, Najdorf |
| 18. I Hausner vs A Haik |
| 1-0 | 28 | 1971 | Wch U20 f-A | B05 Alekhine's Defense, Modern |
| 19. I Hausner vs J Ambroz |
| ½-½ | 59 | 1973 | CZE-ch 7374 | A57 Benko Gambit |
| 20. I Farago vs I Hausner |
| 1-0 | 52 | 1975 | Rimavska Sobota 4th | E95 King's Indian, Orthodox, 7...Nbd7, 8.Re1 |
| 21. I Hausner vs J Adamski |
| 1-0 | 50 | 1975 | Rimavska Sobota 4th | E16 Queen's Indian |
| 22. I Hausner vs Plachetka |
| 0-1 | 42 | 1975 | Rimavska Sobota-A 4th | C84 Ruy Lopez, Closed |
| 23. I Hausner vs Jansa |
| ½-½ | 20 | 1976 | Decin-A | A56 Benoni Defense |
| 24. W Hartston vs I Hausner |
| 1-0 | 30 | 1976 | Decin-A | E90 King's Indian |
| 25. I Hausner vs Alburt |
| 1-0 | 40 | 1976 | Decin-A | A31 English, Symmetrical, Benoni Formation |
Kibitzing
