| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. M Lahtinen vs A Veingold |
| 0-1 | 28 | 1997 | Helsinki We I-HSK | B62 Sicilian, Richter-Rauzer |
| 52. M Rychagov vs M Lahtinen |
| 1-0 | 22 | 1998 | Heart of Finland op | B76 Sicilian, Dragon, Yugoslav Attack |
| 53. P Palmo vs M Lahtinen |
| 0-1 | 52 | 1999 | Jyvaskyla op | B74 Sicilian, Dragon, Classical |
| 54. J Parkkinen vs M Lahtinen |
| ½-½ | 17 | 2000 | Jyvaskyla op 10th | A04 Reti Opening |
| 55. M Lahtinen vs J Tuovinen |
| ½-½ | 30 | 2000 | Jyvaskyla op 10th | C64 Ruy Lopez, Classical |
| 56. M Sorsa vs M Lahtinen |
| 0-1 | 50 | 2000 | Jyvaskyla op 10th | A46 Queen's Pawn Game |
| 57. R Tuominen vs M Lahtinen |
| 0-1 | 40 | 2000 | FIN-chT 2000/01 | A77 Benoni, Classical, 9...Re8, 10.Nd2 |
| 58. H Salo vs M Lahtinen |
| ½-½ | 49 | 2000 | FIN-chT 2000/01 | E53 Nimzo-Indian, 4.e3 |
| 59. M Lahtinen vs K Nieminen |
| ½-½ | 57 | 2001 | FIN-chT 2000/01 | A07 King's Indian Attack |
| 60. T Halmeenmaki vs M Lahtinen |
| 0-1 | 39 | 2001 | FIN-chT 2000/01 | A64 Benoni, Fianchetto, 11...Re8 |
| 61. S Nyysti vs M Lahtinen |
| 0-1 | 32 | 2001 | FIN-chT 2000/01 | B27 Sicilian |
| 62. M Lahtinen vs J Leino |
| ½-½ | 27 | 2001 | FIN-chT 2000/01 | B44 Sicilian |
| 63. M Lahtinen vs E Kengis |
| 0-1 | 31 | 2002 | Heart of Finland op | B42 Sicilian, Kan |
| 64. M Lahtinen vs A Maksimenko |
| 0-1 | 41 | 2002 | European Club Cup | B82 Sicilian, Scheveningen |
| 65. A David vs M Lahtinen |
| 1-0 | 51 | 2006 | European Club Cup | E38 Nimzo-Indian, Classical, 4...c5 |
| 66. M Schaefer vs M Lahtinen |
| 1-0 | 28 | 2006 | European Club Cup | A07 King's Indian Attack |
| 67. H H Grand vs M Lahtinen |
| 0-1 | 62 | 2006 | European Club Cup | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 68. M Lahtinen vs I Schneider |
| ½-½ | 73 | 2006 | European Club Cup | C41 Philidor Defense |
| 69. H Grabher vs M Lahtinen |
| 0-1 | 53 | 2006 | European Club Cup | B75 Sicilian, Dragon, Yugoslav Attack |
Kibitzing
