| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. E Eichhorn vs O Jakobsen |
| 1-0 | 59 |
1964 |
Zurich - jungmeister | B36 Sicilian, Accelerated Fianchetto |
| 2. F Tejero-Royo vs O Jakobsen |
| ½-½ | 44 |
1964 |
Zurich - jungmeister | B22 Sicilian, Alapin |
| 3. Larsen vs O Jakobsen |
| 1-0 | 26 |
1964 |
DEN-ch | B21 Sicilian, 2.f4 and 2.d4 |
| 4. H Holaszek vs O Jakobsen |
| 0-1 | 35 |
1964 |
Zurich - jungmeister | B84 Sicilian, Scheveningen |
| 5. Suetin vs O Jakobsen |
| 1-0 | 49 |
1965 |
Copenhagen (Denmark) | B60 Sicilian, Richter-Rauzer |
| 6. Larsen vs O Jakobsen |
| 1-0 | 84 |
1965 |
Copenhagen | B21 Sicilian, 2.f4 and 2.d4 |
| 7. G Israel vs O Jakobsen |
| 1-0 | 39 |
1966 |
Orebro Stud olm fA | B25 Sicilian, Closed |
| 8. R Hendrik Wostin vs O Jakobsen |
| ½-½ | 54 |
1966 |
Orebro Stud olm prelim5 | B48 Sicilian, Taimanov Variation |
| 9. M Moe vs O Jakobsen |
| ½-½ | 41 |
1969 |
DEN | B93 Sicilian, Najdorf, 6.f4 |
| 10. Huebner vs O Jakobsen |
| 1-0 | 41 |
1971 |
DEN-FRG m | B91 Sicilian, Najdorf, Zagreb (Fianchetto) Variation |
| 11. Kholmov vs O Jakobsen |
| 1-0 | 40 |
1972 |
Kislovodsk | B53 Sicilian |
| 12. Robatsch vs O Jakobsen |
| ½-½ | 51 |
1972 |
Helsinki | B44 Sicilian |
| 13. I Saren vs O Jakobsen |
| ½-½ | 41 |
1972 |
Helsinki | B44 Sicilian |
| 14. Timman vs O Jakobsen |
| 1-0 | 30 |
1972 |
Helsinki | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 15. I Radulov vs O Jakobsen |
| 1-0 | 52 |
1972 |
Helsinki | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 16. Tal vs O Jakobsen |
| 1-0 | 44 |
1972 |
Skopje olm 14/438 | B53 Sicilian |
| 17. Ulf Andersson vs O Jakobsen |
| ½-½ | 51 |
1972 |
Helsinki | B46 Sicilian, Taimanov Variation |
| 18. Pachman vs O Jakobsen |
| 1-0 | 43 |
1975 |
Barcelona | B49 Sicilian, Taimanov Variation |
| 19. Speelman vs O Jakobsen |
| 0-1 | 29 |
1979 |
Ribe | B28 Sicilian, O'Kelly Variation |
| 20. Savon vs O Jakobsen |
| ½-½ | 20 |
1980 |
Esbjerg | B90 Sicilian, Najdorf |
| 21. J G Nicholson vs O Jakobsen |
| 0-1 | 47 |
1981 |
Esbjerg Vesterhav | B42 Sicilian, Kan |
| 22. V McCambridge vs O Jakobsen |
| ½-½ | 44 |
1981 |
Politiken Cup | B76 Sicilian, Dragon, Yugoslav Attack |
| 23. H Dobosz vs O Jakobsen |
| 0-1 | 51 |
1981 |
Politiken Cup | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 24. Jansa vs O Jakobsen |
| 1-0 | 72 |
1981 |
Copenhagen | B70 Sicilian, Dragon Variation |
| 25. K Bjerring vs O Jakobsen |
| ½-½ | 17 |
1981 |
Politiken Cup | B43 Sicilian, Kan, 5.Nc3 |