| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Z Milev vs F Olafsson |
| 0-1 | 31 |
1954 |
Amsterdam ol (Men) | E26 Nimzo-Indian, Samisch |
| 2. Y Porat vs F Olafsson |
| 0-1 | 48 |
1954 |
Amsterdam ol (Men) | E22 Nimzo-Indian, Spielmann Variation |
| 3. Ivkov vs F Olafsson |
| ½-½ | 35 |
1955 |
Hastings | E53 Nimzo-Indian, 4.e3 |
| 4. O'Kelly vs F Olafsson |
| ½-½ | 33 |
1956 |
Olympiad | E56 Nimzo-Indian, 4.e3, Main line with 7...Nc6 |
| 5. Larsen vs F Olafsson |
| 0-1 | 59 |
1957 |
Dallas | E48 Nimzo-Indian, 4.e3 O-O 5.Bd3 d5 |
| 6. C Munoz vs F Olafsson |
| 1-0 | 47 |
1957 |
U26 World Championship Tournament | E58 Nimzo-Indian, 4.e3, Main line with 8...Bxc3 |
| 7. B De Greiff vs F Olafsson |
| 0-1 | 52 |
1958 |
Portoroz izt | E41 Nimzo-Indian |
| 8. Petrosian vs F Olafsson |
 | 0-1 | 76 |
1959 |
Bled | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 9. Petrosian vs F Olafsson |
 | 1-0 | 37 |
1959 |
Bled | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 10. Gligoric vs F Olafsson |
| ½-½ | 42 |
1959 |
Belgrade ct YUG | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 11. E Walther vs F Olafsson |
| ½-½ | 83 |
1959 |
Zuerich | E46 Nimzo-Indian |
| 12. L Marini vs F Olafsson |
| 0-1 | 37 |
1960 |
Mar del Plata | E25 Nimzo-Indian, Samisch |
| 13. Gligoric vs F Olafsson |
| ½-½ | 84 |
1962 |
Varna ol (Men) | E40 Nimzo-Indian, 4.e3 |
| 14. M Cuellar-Gacharna vs F Olafsson |
| 0-1 | 99 |
1962 |
Stockholm izt | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 15. Portisch vs F Olafsson |
| ½-½ | 46 |
1962 |
Stockholm | E51 Nimzo-Indian, 4.e3 |
| 16. Reshevsky vs F Olafsson |
| ½-½ | 41 |
1963 |
1st Piatigorsky Cup | E41 Nimzo-Indian |
| 17. Najdorf vs F Olafsson |
| 0-1 | 41 |
1963 |
Los Angeles | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 18. Portisch vs F Olafsson |
| 0-1 | 41 |
1969 |
Wijk aan Zee | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 19. Portisch vs F Olafsson |
 | 0-1 | 41 |
1969 |
Beverwijk | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 20. Unzicker vs F Olafsson |
| 1-0 | 36 |
1970 |
Lugano | E56 Nimzo-Indian, 4.e3, Main line with 7...Nc6 |
| 21. Gligoric vs F Olafsson |
| ½-½ | 19 |
1970 |
Lugano | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 22. Gligoric vs F Olafsson |
| 1-0 | 21 |
1971 |
Wijk aan Zee Hoogovens A, NED | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 23. Balashov vs F Olafsson |
| 1-0 | 58 |
1971 |
Moscow Ale mem | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 24. Mecking vs F Olafsson |
| ½-½ | 14 |
1971 |
Wijk aan Zee Hoogovens A, NED | E41 Nimzo-Indian |
| 25. H MacGrillen vs F Olafsson |
| 0-1 | 26 |
1974 |
Nice ol prelim | E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation |