| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. O Jakobsen vs A Hollis |
| 1-0 | 52 | 1961 | WchT U26 08th | E67 King's Indian, Fianchetto |
| 2. R Weinstein vs O Jakobsen |
| 1-0 | 21 | 1961 | WchT U26 08th | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 3. O Jakobsen vs Bagirov |
| 0-1 | 21 | 1961 | WchT U26 08th | C18 French, Winawer |
| 4. O Jakobsen vs Gheorghiu |
| 0-1 | 30 | 1961 | Wch U20 prel-A | E86 King's Indian, Samisch, Orthodox, 7.Nge2 c6 |
| 5. H Holaszek vs O Jakobsen |
| 1-0 | 73 | 1961 | Wch U20 prel-A | B48 Sicilian, Taimanov Variation |
| 6. O Jakobsen vs B Nagy |
| ½-½ | 46 | 1961 | Wch U20 prel-A | B46 Sicilian, Taimanov Variation |
| 7. D Thomson vs O Jakobsen |
| 0-1 | 36 | 1961 | Wch U20 prel-A | A16 English |
| 8. O Jakobsen vs W Schmidt |
| ½-½ | 86 | 1961 | Wch U20 prel-A | B90 Sicilian, Najdorf |
| 9. J Rubinetti vs O Jakobsen |
| 1-0 | 38 | 1961 | Wch U20 prel-A | A60 Benoni Defense |
| 10. O Jakobsen vs J Rubinetti |
| 1-0 | 36 | 1961 | Wch U20 fin-B | B09 Pirc, Austrian Attack |
| 11. U Kuettner vs O Jakobsen |
| 0-1 | 43 | 1961 | Wch U20 fin-B | D94 Grunfeld |
| 12. O Jakobsen vs A Rosino |
| 1-0 | 21 | 1961 | Wch U20 fin-B | D98 Grunfeld, Russian |
| 13. O Jakobsen vs E Keogh |
| 1-0 | 19 | 1961 | Wch U20 fin-B | B27 Sicilian |
| 14. J Diekstra vs O Jakobsen |
| 1-0 | 51 | 1961 | World Junior Championship Final-B | A89 Dutch, Leningrad, Main Variation with Nc6 |
| 15. O Jakobsen vs H Holaszek |
| ½-½ | 39 | 1961 | Wch U20 fin-B | C35 King's Gambit Accepted, Cunningham |
| 16. J Minaya vs O Jakobsen |
| 0-1 | 43 | 1961 | Wch U20 fin-B | D83 Grunfeld, Grunfeld Gambit |
| 17. L Gilden vs O Jakobsen |
| 1-0 | 31 | 1961 | Wch U20 fin-B | D99 Grunfeld Defense, Smyslov |
| 18. O Jakobsen vs J R Phillips |
| ½-½ | 46 | 1961 | Wch U20 fin-B | C78 Ruy Lopez |
| 19. D Smith vs O Jakobsen |
| 0-1 | 27 | 1961 | Wch U20 fin-B | A97 Dutch, Ilyin-Genevsky |
| 20. Larsen vs O Jakobsen |
| 1-0 | 38 | 1963 | DEN-ch | A07 King's Indian Attack |
| 21. S From vs O Jakobsen |
| ½-½ | 51 | 1964 | Danish Championship | B17 Caro-Kann, Steinitz Variation |
| 22. Larsen vs O Jakobsen |
 | 1-0 | 26 | 1964 | Danish Championship | B21 Sicilian, 2.f4 and 2.d4 |
| 23. O Jakobsen vs B Kolvig |
| 1-0 | 26 | 1964 | Danish Championship | D37 Queen's Gambit Declined |
| 24. P Norby vs O Jakobsen |
| ½-½ | 30 | 1964 | Danish Championship | B17 Caro-Kann, Steinitz Variation |
| 25. O Jakobsen vs S Hamann |
| ½-½ | 34 | 1964 | Danish Championship | A56 Benoni Defense |
Kibitzing
