| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. S Johannessen vs K Lloyd |
| 1-0 | 32 |
1955 |
Wch U20 prel-B | A21 English |
| 2. S Schweber vs S Johannessen |
| 0-1 | 50 |
1955 |
Wch U20 prel-B | A77 Benoni, Classical, 9...Re8, 10.Nd2 |
| 3. Tringov vs S Johannessen |
| 1-0 | 29 |
1955 |
Wch U20 prel-B | C77 Ruy Lopez |
| 4. S Johannessen vs Portisch |
| ½-½ | 26 |
1955 |
Antwerp | C63 Ruy Lopez, Schliemann Defense |
| 5. Tringov vs S Johannessen |
| 1-0 | 39 |
1955 |
Wch U20 final-A | B06 Robatsch |
| 6. Portisch vs S Johannessen |
| 1-0 | 35 |
1955 |
Wch U20 final-A | B10 Caro-Kann |
| 7. Smyslov vs S Johannessen |
 | 1-0 | 41 |
1956 |
Moscow | C89 Ruy Lopez, Marshall |
| 8. S Johannessen vs R Dworzynski |
| 0-1 | 42 |
1956 |
Chess Olimpic Games, Moscow, | C98 Ruy Lopez, Closed, Chigorin |
| 9. S Johannessen vs P Ravn |
| ½-½ | 35 |
1957 |
corr | E76 King's Indian, Four Pawns Attack |
| 10. S Johannessen vs I Nei |
| 1-0 | 39 |
1959 |
Riga | E70 King's Indian |
| 11. Tal vs S Johannessen |
 | 1-0 | 27 |
1959 |
Riga | D15 Queen's Gambit Declined Slav |
| 12. S Johannessen vs Gipslis |
| 0-1 | 43 |
1959 |
Riga (Latvia) | A46 Queen's Pawn Game |
| 13. Sliwa vs S Johannessen |
| ½-½ | 61 |
1959 |
Riga | E70 King's Indian |
| 14. S Johannessen vs Book |
| ½-½ | 30 |
1960 |
Leipzig ol (Men) qual-A | B24 Sicilian, Closed |
| 15. M Bobotsov vs S Johannessen |
| ½-½ | 38 |
1960 |
Leipzig ol (Men) qual-A | D16 Queen's Gambit Declined Slav |
| 16. S Johannessen vs M Aaron |
| 1-0 | 47 |
1960 |
Leipzig ol (Men) | B73 Sicilian, Dragon, Classical |
| 17. Larsen vs S Johannessen |
| 1-0 | 58 |
1960 |
Berg en Dal zt-A | A84 Dutch |
| 18. Uhlmann vs S Johannessen |
| 1-0 | 57 |
1960 |
Leipzig ol (Men) | A97 Dutch, Ilyin-Genevsky |
| 19. Tal vs S Johannessen |
 | ½-½ | 40 |
1960 |
Stockholm | A83 Dutch, Staunton Gambit |
| 20. Keres vs S Johannessen |
| 1-0 | 35 |
1960 |
Stockholm | E11 Bogo-Indian Defense |
| 21. S Johannessen vs Sliwa |
| 1-0 | 47 |
1960 |
Leipzig ol (Men) fin-B | E21 Nimzo-Indian, Three Knights |
| 22. Gligoric vs S Johannessen |
| ½-½ | 30 |
1960 |
Leipzig ol (Men) qual-A | C70 Ruy Lopez |
| 23. S Johannessen vs Book |
| ½-½ | 26 |
1960 |
Stockholm 6061 | B41 Sicilian, Kan |
| 24. Ghitescu vs S Johannessen |
| ½-½ | 44 |
1961 |
Marianske Lazne zt | C70 Ruy Lopez |
| 25. S Johannessen vs Uhlmann |
| ½-½ | 23 |
1961 |
Marianske Lazne zt | E76 King's Indian, Four Pawns Attack |