| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. J Lammi vs Westerinen |
| ½-½ | 34 | 1992 | Finnish Championship | A00 Uncommon Opening |
| 2. K Valkesalmi vs J Lammi |
| 1-0 | 41 | 1992 | Finnish Championship | A07 King's Indian Attack |
| 3. J Lammi vs H Salo |
| 0-1 | 41 | 1992 | Finnish Championship | E69 King's Indian, Fianchetto, Classical Main line |
| 4. I Hartio vs J Lammi |
| 0-1 | 67 | 1992 | Finnish Championship | B17 Caro-Kann, Steinitz Variation |
| 5. A Nokso-Koivisto vs J Lammi |
| 1-0 | 91 | 1992 | Finnish Championship | C42 Petrov Defense |
| 6. K Pulkkinen vs J Lammi |
| 1-0 | 55 | 1992 | Finnish Championship | B14 Caro-Kann, Panov-Botvinnik Attack |
| 7. J Lammi vs C Henriksson |
| 1-0 | 30 | 1992 | Finnish Championship | A02 Bird's Opening |
| 8. J Norri vs J Lammi |
| 1-0 | 37 | 1992 | Finnish Championship | D53 Queen's Gambit Declined |
| 9. J Lammi vs K Sorri |
| ½-½ | 95 | 1992 | Finnish Championship | A56 Benoni Defense |
| 10. Vyzmanavin vs J Lammi |
| 1-0 | 32 | 1992 | Helsinki Open | D61 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
| 11. N Gaprindashvili vs J Lammi |
| ½-½ | 40 | 1992 | Helsinki Open | D61 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
| 12. J Lammi vs T Tuomala |
| ½-½ | 75 | 1993 | Heart of Finland Open | A07 King's Indian Attack |
| 13. J Lammi vs T Paakkonen |
| 0-1 | 40 | 1993 | Heart of Finland Open | D15 Queen's Gambit Declined Slav |
| 14. S Hamalainen vs J Lammi |
| ½-½ | 49 | 1993 | Heart of Finland Open | B13 Caro-Kann, Exchange |
| 15. O Salmensuu vs J Lammi |
| ½-½ | 38 | 1993 | Heart of Finland Open | B07 Pirc |
| 16. J Lammi vs L Nymans |
| 1-0 | 29 | 1993 | Heart of Finland Open | D52 Queen's Gambit Declined |
| 17. T Keskisarja vs J Lammi |
| 1-0 | 52 | 1994 | Helsinki-ch | B06 Robatsch |
| 18. T Keskisarja vs J Lammi |
| ½-½ | 27 | 1994 | Vantaa op2 | C42 Petrov Defense |
| 19. J Lammi vs M Rychagov |
| ½-½ | 18 | 1996 | Tampere Elo Taraus op | A02 Bird's Opening |
| 20. J Lammi vs K Konsala |
| 0-1 | 39 | 1996 | FIN-chT 9697 Div-A | A02 Bird's Opening |
| 21. J Lammi vs T Viljava |
| 1-0 | 39 | 1996 | FIN-chT 9697 Div-A | A02 Bird's Opening |
| 22. J Lammi vs J Norri |
| 0-1 | 38 | 1997 | Helsinki-ch | A02 Bird's Opening |
| 23. U B Arat vs J Lammi |
| ½-½ | 60 | 2011 | European Club Cup | E91 King's Indian |
| 24. S Kosoric vs J Lammi |
| 1-0 | 62 | 2011 | European Club Cup | B07 Pirc |
| 25. J Lammi vs L Andonovski |
 | 1-0 | 40 | 2011 | European Club Cup | A02 Bird's Opening |
Kibitzing
