| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. Larsen vs H Olafsson |
| 1-0 | 31 |
1978 |
Reykjavik | E90 King's Indian |
| 27. H Olafsson vs H Ree |
| ½-½ | 10 |
1978 |
Lone Pine | D67 Queen's Gambit Declined, Orthodox Defense, Bd3 line |
| 28. H Olafsson vs Timman |
| 1-0 | 43 |
1978 |
6, Lone Pine op | A28 English |
| 29. H Olafsson vs J Grefe |
| 1-0 | 33 |
1979 |
Lone Pine op | E92 King's Indian |
| 30. Benko vs H Olafsson |
| ½-½ | 41 |
1979 |
Lone Pine op | D41 Queen's Gambit Declined, Semi-Tarrasch |
| 31. H Olafsson vs Pachman |
| ½-½ | 13 |
1979 |
Lone | E08 Catalan, Closed |
| 32. Shamkovich vs H Olafsson |
| 1-0 | 35 |
1979 |
Lone Pine (USA) | B81 Sicilian, Scheveningen, Keres Attack |
| 33. H Olafsson vs J Thibault |
| 1-0 | 37 |
1979 |
Lone Pine op | A10 English |
| 34. L Karlsson vs H Olafsson |
| 0-1 | 37 |
1979 |
Lucerne | A04 Reti Opening |
| 35. V Liberzon vs H Olafsson |
| ½-½ | 25 |
1979 |
Lone Pine op | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 36. Gligoric vs H Olafsson |
| 1-0 | 30 |
1979 |
Lone Pine op | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 37. H Olafsson vs Biyiasas |
| ½-½ | 34 |
1979 |
Lone Pine op | E92 King's Indian |
| 38. H Olafsson vs M Paolozzi |
| 1-0 | 42 |
1979 |
Lone Pine op | A34 English, Symmetrical |
| 39. H Olafsson vs Karpov |
 | 0-1 | 37 |
1980 |
Ol, Malta 30/42 | A28 English |
| 40. H Olafsson vs Miles |
| 0-1 | 28 |
1980 |
Reykjavik | E12 Queen's Indian |
| 41. H Olafsson vs Tringov |
| ½-½ | 25 |
1980 |
Malta ol (Men) | A55 Old Indian, Main line |
| 42. H Olafsson vs Portisch |
| 0-1 | 34 |
1980 |
Malta | E15 Queen's Indian |
| 43. H Olafsson vs Ljubojevic |
| 0-1 | 63 |
1980 |
MLT | A30 English, Symmetrical |
| 44. H Olafsson vs Kupreichik |
| 0-1 | 33 |
1980 |
Reykjavik | A28 English |
| 45. Timman vs H Olafsson |
| 0-1 | 38 |
1980 |
Malta ol | A48 King's Indian |
| 46. Geller vs H Olafsson |
| 1-0 | 57 |
1980 |
Malta | B23 Sicilian, Closed |
| 47. H Olafsson vs Quinteros |
| ½-½ | 50 |
1980 |
It (cat.13) | B92 Sicilian, Najdorf, Opocensky Variation |
| 48. H Olafsson vs Myagmarsuren |
| 0-1 | 36 |
1980 |
Valetta olm | D63 Queen's Gambit Declined, Orthodox Defense |
| 49. Browne vs H Olafsson |
| 1-0 | 24 |
1980 |
? | D41 Queen's Gambit Declined, Semi-Tarrasch |
| 50. Timman vs H Olafsson |
| 1-0 | 41 |
1980 |
Buenos Aires 30/690 | D86 Grunfeld, Exchange |