Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. I Lesnik vs M Rajkovic |
| 0-1 | 31 | 1938 | Yugoslav Amateur Championship | B18 Caro-Kann, Classical |
2. I Lesnik vs M Subaric |
| 1-0 | 33 | 1938 | Yugoslav Amateur Championship | C10 French |
3. I Lesnik vs J Siska |
| 1-0 | 35 | 1938 | Yugoslav Amateur Championship | B72 Sicilian, Dragon |
4. I Lesnik vs P Carev |
| 1-0 | 22 | 1938 | Yugoslav Amateur Championship | B73 Sicilian, Dragon, Classical |
5. A Jonke vs I Lesnik |
| 0-1 | 36 | 1938 | Yugoslav Amateur Championship | E34 Nimzo-Indian, Classical, Noa Variation |
6. I Lesnik vs B Sikosek |
| 1-0 | 25 | 1938 | Yugoslav Amateur Championship | C11 French |
7. B Rabar vs I Lesnik |
| 0-1 | 23 | 1938 | Yugoslav Amateur Championship playoff | D51 Queen's Gambit Declined |
8. I Lesnik vs B Rabar |
| 1-0 | 54 | 1938 | Yugoslav Amateur Championship playoff | E40 Nimzo-Indian, 4.e3 |
9. I Lesnik vs M Schreiber |
| 0-1 | 53 | 1939 | Yugoslav Championship | C83 Ruy Lopez, Open |
10. I Lesnik vs S Kalabar |
| 1-0 | 15 | 1939 | Yugoslav Championship | B84 Sicilian, Scheveningen |
11. I Lesnik vs Vidmar |
 | 1-0 | 18 | 1939 | Yugoslav Championship | C56 Two Knights |
12. S Vukovic vs I Lesnik |
| ½-½ | 31 | 1939 | Yugoslav Championship | A47 Queen's Indian |
13. V Petek vs I Lesnik |
| 0-1 | 48 | 1939 | Yugoslav Championship | A15 English |
14. I Lesnik vs V Tomovic |
| 0-1 | 55 | 1939 | Yugoslav Championship | D45 Queen's Gambit Declined Semi-Slav |
15. M Broeder vs I Lesnik |
| 1-0 | 28 | 1939 | Yugoslav Championship | C07 French, Tarrasch |
16. I Lesnik vs N Karaklajic |
| 1-0 | 16 | 1948 | Yugoslav Semifinal Center | C13 French |
17. I Lesnik vs N Zagar |
| 1-0 | 15 | 1948 | Yugoslav Semifinal Center | C17 French, Winawer, Advance |
18. M Udovcic vs I Lesnik |
| 1-0 | 42 | 1948 | Yugoslav Semifinal Center | C01 French, Exchange |
19. I Lesnik vs A Bozic |
| 1-0 | 40 | 1948 | Yugoslav Semifinal Center | C98 Ruy Lopez, Closed, Chigorin |
20. I Lesnik vs L Prins |
| 1-0 | 30 | 1948 | Rogaska Slatina | C71 Ruy Lopez |
21. Janosevic vs I Lesnik |
| 1-0 | 38 | 1948 | Rogaska Slatina | C99 Ruy Lopez, Closed, Chigorin, 12...cd |
22. I Lesnik vs S Nedeljkovic |
| 1-0 | 38 | 1948 | Rogaska Slatina | D15 Queen's Gambit Declined Slav |
23. B Rabar vs I Lesnik |
| 1-0 | 34 | 1948 | Rogaska Slatina | D29 Queen's Gambit Accepted, Classical |
24. I Lesnik vs J Siska |
 | 0-1 | 31 | 1948 | Rogaska Slatina | B76 Sicilian, Dragon, Yugoslav Attack |
25. Z Gabrovsek vs I Lesnik |
| 1-0 | 35 | 1955 | Slovenian Championship | A04 Reti Opening |