| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. I Jankovec vs H Liebert |
 | 1-0 | 40 |
1871 |
Havirov | E68 King's Indian, Fianchetto, Classical Variation, 8.e4 |
| 2. I Jankovec vs Ujtelky |
| ½-½ | 50 |
1963 |
CSR-ch sf | D13 Queen's Gambit Declined Slav, Exchange Variation |
| 3. I Jankovec vs F Blatny |
| ½-½ | 27 |
1965 |
CSR-ch | D45 Queen's Gambit Declined Semi-Slav |
| 4. I Jankovec vs Smejkal |
| 0-1 | 31 |
1965 |
CSR-ch | B36 Sicilian, Accelerated Fianchetto |
| 5. I Jankovec vs J Marsalek |
| 0-1 | 55 |
1965 |
CSR-ch | A88 Dutch, Leningrad, Main Variation with c6 |
| 6. I Jankovec vs J Vesely |
| 0-1 | 32 |
1965 |
CSR-ch | E14 Queen's Indian |
| 7. I Jankovec vs J Kozma |
| 0-1 | 57 |
1967 |
CSR-ch | E51 Nimzo-Indian, 4.e3 |
| 8. Smejkal vs I Jankovec |
| 1-0 | 73 |
1967 |
CSR-ch | B14 Caro-Kann, Panov-Botvinnik Attack |
| 9. J Lechtynsky vs I Jankovec |
| 1-0 | 37 |
1967 |
CSR-ch | B19 Caro-Kann, Classical |
| 10. F Blatny vs I Jankovec |
| ½-½ | 40 |
1967 |
CSR-ch | B19 Caro-Kann, Classical |
| 11. I Jankovec vs Ujtelky |
| 1-0 | 79 |
1967 |
CSR-ch | B06 Robatsch |
| 12. I Jankovec vs F Blatny |
| 0-1 | 35 |
1968 |
Havirov | A25 English |
| 13. I Jankovec vs E Paoli |
| 1-0 | 31 |
1969 |
Stary Smokovec | E60 King's Indian Defense |
| 14. I Jankovec vs Ujtelky |
| ½-½ | 53 |
1969 |
Tatran Cup 17th | B06 Robatsch |
| 15. Plachetka vs I Jankovec |
| 1-0 | 22 |
1969 |
Stary Smokovec | A30 English, Symmetrical |
| 16. I Jankovec vs J Kozma |
| 0-1 | 51 |
1969 |
Stary Smokovec | A07 King's Indian Attack |
| 17. I Jankovec vs Hort |
| 0-1 | 26 |
1970 |
CZE | A25 English |
| 18. I Jankovec vs Smejkal |
| 0-1 | 35 |
1970 |
CSR-ch Havirov | A07 King's Indian Attack |
| 19. I Jankovec vs F Blatny |
| 1-0 | 33 |
1970 |
CSR-ch Havirov | A93 Dutch, Stonewall, Botvinnik Variation |
| 20. I Jankovec vs Jansa |
| ½-½ | 19 |
1970 |
CZE | E67 King's Indian, Fianchetto |
| 21. I Jankovec vs J Lechtynsky |
| 0-1 | 40 |
1970 |
CSR-ch Havirov | A98 Dutch, Ilyin-Genevsky Variation with Qc2 |
| 22. I Jankovec vs Jansa |
| ½-½ | 76 |
1972 |
Trinec | D86 Grunfeld, Exchange |
| 23. I Jankovec vs J Lechtynsky |
| 0-1 | 40 |
1972 |
CSR-ch | A04 Reti Opening |
| 24. Plachetka vs I Jankovec |
 | 1-0 | 35 |
1972 |
CSR-ch | A88 Dutch, Leningrad, Main Variation with c6 |
| 25. Hort vs I Jankovec |
| ½-½ | 36 |
1972 |
Trinec | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |