| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. S James vs J Jansson |
| 0-1 | 47 |
1981 |
EU-ch jr | E73 King's Indian |
| 2. J Jansson vs F Feistenauer |
| 1-0 | 50 |
1981 |
EU-ch jr | B90 Sicilian, Najdorf |
| 3. T Brionne vs J Jansson |
| 0-1 | 41 |
1981 |
EU-ch jr | A42 Modern Defense, Averbakh System |
| 4. P Lyrberg vs J Jansson |
| 0-1 | 42 |
1994 |
Oslo-op | A55 Old Indian, Main line |
| 5. J Jansson vs A Campanile |
| 1-0 | 60 |
1994 |
Oslo-op | A15 English |
| 6. D Hersvik vs J Jansson |
| 0-1 | 45 |
2001 |
TCh-NOR Final | B96 Sicilian, Najdorf |
| 7. J Jansson vs K B Stein |
| 1-0 | 41 |
2001 |
ECC | A04 Reti Opening |
| 8. O Hole vs J Jansson |
 | 0-1 | 34 |
2001 |
TCh-NOR Final | A04 Reti Opening |
| 9. E Bennett vs J Jansson |
| 0-1 | 43 |
2001 |
ECC | E12 Queen's Indian |
| 10. J Jansson vs Harald Isachsen |
| 1-0 | 23 |
2001 |
TCh-NOR Final | B23 Sicilian, Closed |
| 11. J Jansson vs O Dancevski |
| 1-0 | 55 |
2001 |
ECC | A07 King's Indian Attack |
| 12. J Jansson vs G Tallaksen |
| 1-0 | 56 |
2001 |
TCh-NOR Final | A14 English |
| 13. J Jansson vs K Stokke |
| 1-0 | 55 |
2004 |
Norwegian Championship | D02 Queen's Pawn Game |
| 14. J Jansson vs S Heim |
| 1-0 | 44 |
2004 |
Norwegian Championship | D02 Queen's Pawn Game |
| 15. Leer-Salvesen vs J Jansson |
| 0-1 | 40 |
2004 |
Norwegian Championship | D46 Queen's Gambit Declined Semi-Slav |
| 16. J Jansson vs A Lipecki |
| 1-0 | 53 |
2005 |
21st European Club Cup | D02 Queen's Pawn Game |
| 17. S Heim vs J Jansson |
| 0-1 | 47 |
2005 |
21st European Club Cup | B90 Sicilian, Najdorf |
| 18. S Bjerke vs J Jansson |
| 0-1 | 38 |
2005 |
Norwegian Championship | E38 Nimzo-Indian, Classical, 4...c5 |
| 19. J Jansson vs S Brunello |
| 1-0 | 30 |
2005 |
21st European Club Cup | A03 Bird's Opening |
| 20. J L Hammer vs J Jansson |
| 0-1 | 36 |
2005 |
Norwegian Championship | D00 Queen's Pawn Game |
| 21. M Erdogdu vs J Jansson |
| 0-1 | 45 |
2005 |
21st European Club Cup | B90 Sicilian, Najdorf |
| 22. S Berndt vs J Jansson |
| 0-1 | 34 |
2006 |
European Club Cup | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 23. R Saunders vs J Jansson |
| 0-1 | 60 |
2006 |
European Club Cup | B23 Sicilian, Closed |
| 24. J Jansson vs Y Jouhki |
| 1-0 | 37 |
2006 |
European Club Cup | A04 Reti Opening |
| 25. D Madsen vs J Jansson |
| 0-1 | 43 |
2006 |
Norwegian Championship | A87 Dutch, Leningrad, Main Variation |
