| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. E Hintikka vs J Mertanen |
| 1-0 | 33 |
1992 |
FIN-chT | B10 Caro-Kann |
| 2. Novik vs J Mertanen |
| 1-0 | 50 |
2000 |
10th Open | A04 Reti Opening |
| 3. K Sorri vs J Mertanen |
| 1-0 | 14 |
2000 |
TCh-FIN 00-01 | A49 King's Indian, Fianchetto without c4 |
| 4. M Karttunen vs J Mertanen |
| 1-0 | 33 |
2000 |
10th Open | A57 Benko Gambit |
| 5. N Sorsa vs J Mertanen |
| 1-0 | 41 |
2000 |
TCh-FIN 00-01 | B92 Sicilian, Najdorf, Opocensky Variation |
| 6. J Mertanen vs J Puranen |
| ½-½ | 42 |
2000 |
TCh-FIN 00-01 | A44 Old Benoni Defense |
| 7. A Payen vs J Mertanen |
| ½-½ | 26 |
2000 |
10th Open | B92 Sicilian, Najdorf, Opocensky Variation |
| 8. J Mertanen vs M Kivisto |
| ½-½ | 56 |
2000 |
TCh-FIN 00-01 | D30 Queen's Gambit Declined |
| 9. J Mertanen vs S Nyysti |
| ½-½ | 15 |
2000 |
10th Open | A57 Benko Gambit |
| 10. J Mertanen vs J P Haapasalo |
| ½-½ | 60 |
2000 |
TCh-FIN 00-01 | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 11. J Mertanen vs Tuomo Halmeenmaki |
| 1-0 | 25 |
2001 |
TCh-FIN 00-01 | E46 Nimzo-Indian |
| 12. J Mertanen vs J Tella |
| 0-1 | 37 |
2001 |
TCh-FIN 00-01 | D15 Queen's Gambit Declined Slav |
| 13. Y Jouhki vs J Mertanen |
| 1-0 | 39 |
2001 |
TCh-FIN 00-01 | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 14. J Mertanen vs T Franssila |
| 1-0 | 52 |
2001 |
TCh-FIN 00-01 | D11 Queen's Gambit Declined Slav |
| 15. J Mertanen vs R Akesson |
| 1-0 | 65 |
2002 |
32nd Rilton Cup | D85 Grunfeld |
| 16. G Kuzmin vs J Mertanen |
| 1-0 | 32 |
2002 |
European Club Cup | B05 Alekhine's Defense, Modern |
| 17. S Brynell vs J Mertanen |
| 1-0 | 39 |
2002 |
32nd Rilton Cup | B22 Sicilian, Alapin |
| 18. V Popov vs J Mertanen |
| 1-0 | 32 |
2003 |
32nd Rilton Cup | D15 Queen's Gambit Declined Slav |