| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Tarjan vs H Olafsson |
| 1-0 | 36 |
1977 |
Lone Pine (USA) | E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation |
| 2. P Youngworth vs H Olafsson |
| 0-1 | 34 |
1978 |
Lone Pine | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 3. Gligoric vs H Olafsson |
| 1-0 | 30 |
1979 |
Lone Pine op | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 4. D Gurevich vs H Olafsson |
| 0-1 | 44 |
1982 |
Reykjavik | E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation |
| 5. Pinter vs H Olafsson |
| ½-½ | 34 |
1985 |
It (cat.11) | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 6. Salov vs H Olafsson |
| ½-½ | 34 |
1988 |
St John | E48 Nimzo-Indian, 4.e3 O-O 5.Bd3 d5 |
| 7. Bareev vs H Olafsson |
| 1-0 | 66 |
1990 |
Hastings 9091 | E31 Nimzo-Indian, Leningrad, Main line |
| 8. Shirov vs H Olafsson |
| 1-0 | 23 |
1991 |
Ter Apel | E25 Nimzo-Indian, Samisch |
| 9. Shirov vs H Olafsson |
| 1-0 | 23 |
1992 |
Reykjavik Ftacnik | E25 Nimzo-Indian, Samisch |
| 10. Gligoric vs H Olafsson |
| ½-½ | 43 |
1995 |
Reykjavik Olafsson | E52 Nimzo-Indian, 4.e3, Main line with ...b6 |
| 11. Petursson vs H Olafsson |
| 1-0 | 40 |
1996 |
Eikram mem op Gausdal NOR | E46 Nimzo-Indian |
| 12. Kharlov vs H Olafsson |
| 1-0 | 32 |
1999 |
Cappelle op 15th | E34 Nimzo-Indian, Classical, Noa Variation |
| 13. Korchnoi vs H Olafsson |
| ½-½ | 47 |
2000 |
Reykjavik op19 | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 14. T E Wiley vs H Olafsson |
| ½-½ | 41 |
2000 |
Reykjavik op19 | E39 Nimzo-Indian, Classical, Pirc Variation |
| 15. Stefansson vs H Olafsson |
| 1-0 | 31 |
2001 |
Jonsson Mem Open | E56 Nimzo-Indian, 4.e3, Main line with 7...Nc6 |
| 16. H Harestad vs H Olafsson |
| 0-1 | 38 |
2001 |
ECC | E38 Nimzo-Indian, Classical, 4...c5 |
| 17. M Ezat vs H Olafsson |
| ½-½ | 23 |
2002 |
Bled Olympiad | E25 Nimzo-Indian, Samisch |
| 18. I Sokolov vs H Olafsson |
| 0-1 | 51 |
2002 |
1st Milk Masters | E32 Nimzo-Indian, Classical |
| 19. V Burmakin vs H Olafsson |
 | 0-1 | 18 |
2003 |
4th IECC | E32 Nimzo-Indian, Classical |
| 20. Aronian vs H Olafsson |
 | 1-0 | 32 |
2004 |
Reykjavik Blitz | E32 Nimzo-Indian, Classical |
| 21. Aronian vs H Olafsson |
 | 1-0 | 35 |
2004 |
Reykjavik Rapid | E38 Nimzo-Indian, Classical, 4...c5 |
| 22. Gulko vs H Olafsson |
| ½-½ | 29 |
2004 |
3rd Aeroflot Festival | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 23. S Ionov vs H Olafsson |
| 1-0 | 32 |
2008 |
Aeroflot Open | E25 Nimzo-Indian, Samisch |