| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. D Stojanovski vs J Mertanen |
| 1-0 | 42 | 2000 | European Club Cup | B80 Sicilian, Scheveningen |
| 27. J Mertanen vs M Kivisto |
| ½-½ | 56 | 2000 | FIN-chT 2000/01 | A90 Dutch |
| 28. J Mertanen vs J Puranen |
 | ½-½ | 42 | 2000 | FIN-chT 2000/01 | A44 Old Benoni Defense |
| 29. N Sorsa vs J Mertanen |
| 1-0 | 41 | 2000 | FIN-chT 2000/01 | B92 Sicilian, Najdorf, Opocensky Variation |
| 30. Y Rantanen vs J Mertanen |
| 0-1 | 40 | 2001 | Espoo op | B05 Alekhine's Defense, Modern |
| 31. J Mertanen vs T Halmeenmaki |
| 1-0 | 25 | 2001 | FIN-chT 2000/01 | E46 Nimzo-Indian |
| 32. J Mertanen vs T Franssila |
| 1-0 | 52 | 2001 | FIN-chT 2000/01 | D11 Queen's Gambit Declined Slav |
| 33. Y Jouhki vs J Mertanen |
| 1-0 | 39 | 2001 | FIN-chT 2000/01 | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 34. J Mertanen vs J Paasikangas |
| 0-1 | 37 | 2001 | FIN-chT 2000/01 | D15 Queen's Gambit Declined Slav |
| 35. G Kuzmin vs J Mertanen |
| 1-0 | 32 | 2002 | European Club Cup | B05 Alekhine's Defense, Modern |
| 36. J Mertanen vs R Akesson |
| 1-0 | 65 | 2002 | Rilton Cup 2002/03 | D85 Grunfeld |
| 37. S Brynell vs J Mertanen |
| 1-0 | 39 | 2002 | Rilton Cup 2002/03 | B22 Sicilian, Alapin |
| 38. S Ivanov vs J Mertanen |
| 1-0 | 41 | 2003 | Kuopio op | A36 English |
| 39. J Mertanen vs O Brendel |
| ½-½ | 23 | 2003 | Rilton Cup 2002/03 | D85 Grunfeld |
| 40. V Popov vs J Mertanen |
| 1-0 | 32 | 2003 | Rilton Cup 2002/03 | D15 Queen's Gambit Declined Slav |
| 41. K Sorri vs J Mertanen |
| ½-½ | 8 | 2003 | FIN-chT 0203 | D02 Queen's Pawn Game |
| 42. J Mertanen vs V Belov |
| ½-½ | 45 | 2010 | European Club Cup | D12 Queen's Gambit Declined Slav |
| 43. J Mertanen vs A Secer |
| 1-0 | 60 | 2010 | European Club Cup | D35 Queen's Gambit Declined |
| 44. J Mertanen vs S Pavlov |
| ½-½ | 78 | 2010 | European Club Cup | E10 Queen's Pawn Game |
| 45. A Butnorius vs J Mertanen |
| 0-1 | 124 | 2010 | European Club Cup | A64 Benoni, Fianchetto, 11...Re8 |
| 46. T Michalczak vs J Mertanen |
| ½-½ | 19 | 2010 | European Club Cup | C96 Ruy Lopez, Closed |
| 47. J Mertanen vs E Arlandi |
| 0-1 | 49 | 2010 | European Club Cup | D85 Grunfeld |
| 48. H Koskinen vs J Mertanen |
| ½-½ | 7 | 2010 | European Club Cup | A04 Reti Opening |
| 49. J Mertanen vs M Sieciechowicz |
| 0-1 | 34 | 2011 | Krakow Open 2010/11 | D12 Queen's Gambit Declined Slav |
| 50. J Mertanen vs D Wcislo |
| 0-1 | 90 | 2011 | Krakow Open 2010/11 | A59 Benko Gambit |
Kibitzing
