| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. M Lahtinen vs I Nei |
| ½-½ | 36 | 1990 | Finnish Chess Federation Tournament | C47 Four Knights |
| 27. M Lahtinen vs K Sorri |
| ½-½ | 17 | 1990 | Finnish Chess Federation Tournament | B93 Sicilian, Najdorf, 6.f4 |
| 28. K Ojanen vs M Lahtinen |
| ½-½ | 31 | 1990 | Finnish Chess Federation Tournament | D16 Queen's Gambit Declined Slav |
| 29. A Hentunen vs M Lahtinen |
| ½-½ | 61 | 1990 | Finnish Chess Federation Tournament | A11 English, Caro-Kann Defensive System |
| 30. M Kivisto vs M Lahtinen |
| 0-1 | 18 | 1990 | Finnish Chess Federation Tournament | B74 Sicilian, Dragon, Classical |
| 31. M Lahtinen vs B Diesen |
| 0-1 | 61 | 1990 | Finnish Chess Federation Tournament | A07 King's Indian Attack |
| 32. J P Tyni vs M Lahtinen |
| 1-0 | 57 | 1990 | Finnish Championship | A57 Benko Gambit |
| 33. J Lindstedt vs M Lahtinen |
| ½-½ | 30 | 1990 | Finnish Championship | D13 Queen's Gambit Declined Slav, Exchange Variation |
| 34. M Lahtinen vs E Lipsanen |
| ½-½ | 17 | 1990 | Finnish Championship | B12 Caro-Kann Defense |
| 35. P Hokkanen vs M Lahtinen |
| ½-½ | 22 | 1990 | Finnish Championship | D14 Queen's Gambit Declined Slav, Exchange Variation |
| 36. M Lahtinen vs J Norri |
| 0-1 | 25 | 1990 | Finnish Championship | B46 Sicilian, Taimanov Variation |
| 37. M Lahtinen vs V Maki |
| ½-½ | 47 | 1990 | Finnish Championship | B56 Sicilian |
| 38. M Lahtinen vs M Manninen |
| 0-1 | 25 | 1990 | Finnish Championship | C05 French, Tarrasch |
| 39. Y Rantanen vs M Lahtinen |
| 1-0 | 71 | 1990 | Finnish Championship | D10 Queen's Gambit Declined Slav |
| 40. E Raaste vs M Lahtinen |
| ½-½ | 20 | 1990 | Finnish Championship | B18 Caro-Kann, Classical |
| 41. M Lahtinen vs H Laine |
| ½-½ | 47 | 1990 | Finnish Championship | C07 French, Tarrasch |
| 42. J Paavilainen vs M Lahtinen |
| ½-½ | 51 | 1990 | Finnish Championship | D10 Queen's Gambit Declined Slav |
| 43. M Lahtinen vs K Valkesalmi |
| ½-½ | 20 | 1990 | Finnish Championship | C70 Ruy Lopez |
| 44. K Sorri vs M Lahtinen |
| ½-½ | 55 | 1990 | Finnish Championship | D14 Queen's Gambit Declined Slav, Exchange Variation |
| 45. M Lahtinen vs P Kekki |
| ½-½ | 12 | 1990 | Finnish Championship | B01 Scandinavian |
| 46. A Nokso-Koivisto vs M Lahtinen |
| ½-½ | 21 | 1990 | Finnish Championship | B18 Caro-Kann, Classical |
| 47. K Sorri vs M Lahtinen |
| 1-0 | 30 | 1991 | Helsinki HM | E13 Queen's Indian, 4.Nc3, Main line |
| 48. A Veingold vs M Lahtinen |
| 0-1 | 31 | 1996 | Helsinki We SKF op | E17 Queen's Indian |
| 49. J Aijala vs M Lahtinen |
| 0-1 | 41 | 1997 | Heart of Finland op 07th | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
| 50. M Lahtinen vs V Dambrauskas |
| 0-1 | 45 | 1997 | Heart of Finland op | B47 Sicilian, Taimanov (Bastrikov) Variation |
Kibitzing
