Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. S Johannessen vs K W 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. S Johannessen vs Portisch |
| ½-½ | 26 | 1955 | Wch U20 prel-B | C63 Ruy Lopez, Schliemann Defense |
4. Tringov vs S Johannessen |
| 1-0 | 29 | 1955 | Wch U20 prel-B | C77 Ruy Lopez |
5. Mednis vs S Johannessen |
| 1-0 | 43 | 1955 | Wch U20 final-A | C04 French, Tarrasch, Guimard Main line |
6. S Johannessen vs M Farre |
| 0-1 | 29 | 1955 | Wch U20 final-A | E88 King's Indian, Samisch, Orthodox, 7.d5 c6 |
7. Portisch vs S Johannessen |
| 1-0 | 35 | 1955 | Wch U20 final-A | B10 Caro-Kann |
8. Tringov vs S Johannessen |
| 1-0 | 39 | 1955 | Wch U20 final-A | B10 Caro-Kann |
9. Spassky vs S Johannessen |
| 1-0 | 29 | 1955 | Wch U20 final-A | D15 Queen's Gambit Declined Slav |
10. Z Milev vs S Johannessen |
| 1-0 | 32 | 1956 | Moscow Olympiad qual-1 | E80 King's Indian, Samisch Variation |
11. S Johannessen vs G Backlund |
| 0-1 | 56 | 1956 | Moscow Olympiad qual-1 | A15 English |
12. Smyslov vs S Johannessen |
 | 1-0 | 41 | 1956 | Moscow Olympiad qual-1 | C89 Ruy Lopez, Marshall |
13. S Johannessen vs G Szapiro |
| 1-0 | 40 | 1956 | Moscow Olympiad qual-1 | E76 King's Indian, Four Pawns Attack |
14. S Johannessen vs W Folz |
| 1-0 | 43 | 1956 | Moscow Olympiad qual-1 | A34 English, Symmetrical |
15. S Burstein vs S Johannessen |
| 1-0 | 28 | 1956 | Moscow Olympiad Final-B | B25 Sicilian, Closed |
16. S Johannessen vs A Kinzel |
| 0-1 | 20 | 1956 | Moscow Olympiad Final-B | C43 Petrov, Modern Attack |
17. S Johannessen vs A Niemela |
| ½-½ | 44 | 1956 | Moscow Olympiad Final-B | C97 Ruy Lopez, Closed, Chigorin |
18. L A Sanchez vs S Johannessen |
| 1-0 | 40 | 1956 | Moscow Olympiad Final-B | E63 King's Indian, Fianchetto, Panno Variation |
19. S Johannessen vs S Gislason |
| 1-0 | 40 | 1956 | Moscow Olympiad Final-B | E26 Nimzo-Indian, Samisch |
20. S Johannessen vs C Jauregui |
| 1-0 | 29 | 1956 | Moscow Olympiad Final-B | D20 Queen's Gambit Accepted |
21. W J Muhring vs S Johannessen |
| 0-1 | 27 | 1956 | Moscow Olympiad Final-B | E81 King's Indian, Samisch |
22. G Backlund vs S Johannessen |
| 0-1 | 33 | 1956 | Moscow Olympiad Final-B | A99 Dutch, Ilyin-Genevsky Variation with b3 |
23. S Johannessen vs J M Boey |
| 0-1 | 38 | 1956 | Moscow Olympiad Final-B | E87 King's Indian, Samisch, Orthodox |
24. S Johannessen vs R Dworzynski |
| 0-1 | 42 | 1956 | Moscow Olympiad Final-B | C98 Ruy Lopez, Closed, Chigorin |
25. S Johannessen vs P Ravn |
| ½-½ | 35 | 1957 | corr | E76 King's Indian, Four Pawns Attack |