| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Portisch vs I Kanko |
| 1-0 | 36 |
1963 |
Halle | A43 Old Benoni |
| 2. B Malich vs I Kanko |
| 1-0 | 28 |
1963 |
Halle | E12 Queen's Indian |
| 3. S Johannessen vs I Kanko |
| 1-0 | 28 |
1963 |
Halle | E76 King's Indian, Four Pawns Attack |
| 4. I Kanko vs I Johannsson |
| ½-½ | 21 |
1963 |
Halle | D32 Queen's Gambit Declined, Tarrasch |
| 5. I Kanko vs P Ofstad |
 | 1-0 | 28 |
1963 |
Halle | E26 Nimzo-Indian, Samisch |
| 6. O Kinnmark vs I Kanko |
| 1-0 | 39 |
1963 |
Halle | C05 French, Tarrasch |
| 7. Ivkov vs I Kanko |
| 1-0 | 41 |
1963 |
Halle | E11 Bogo-Indian Defense |
| 8. I Kanko vs S Hamann |
| ½-½ | 48 |
1963 |
Halle | E40 Nimzo-Indian, 4.e3 |
| 9. I Kanko vs Minev |
| ½-½ | 46 |
1963 |
Halle | E43 Nimzo-Indian, Fischer Variation |
| 10. Kavalek vs I Kanko |
| 1-0 | 36 |
1963 |
Halle | E69 King's Indian, Fianchetto, Classical Main line |
| 11. Uhlmann vs I Kanko |
| 1-0 | 42 |
1963 |
Halle | E11 Bogo-Indian Defense |
| 12. I Kanko vs J H Donner |
| 1-0 | 41 |
1963 |
Halle | A56 Benoni Defense |
| 13. I Kanko vs Larsen |
| 0-1 | 29 |
1963 |
Halle | E46 Nimzo-Indian |
| 14. I Kanko vs H Westerinen |
| 0-1 | 34 |
1963 |
Halle | A71 Benoni, Classical, 8.Bg5 |
| 15. Robatsch vs I Kanko |
| 1-0 | 34 |
1963 |
Halle zt | B32 Sicilian |
| 16. M Pavlov vs I Kanko |
| 1-0 | 45 |
1963 |
Halle | B32 Sicilian |
| 17. I Kanko vs Doda |
| ½-½ | 42 |
1963 |
Halle | A56 Benoni Defense |
| 18. I Kanko vs M Johansson Sr |
| ½-½ | 20 |
1963 |
Halle | E81 King's Indian, Samisch |
| 19. I Kanko vs P Trifunovic |
| ½-½ | 26 |
1963 |
Halle | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 20. B Malich vs I Kanko |
| ½-½ | 60 |
1971 |
EU-chT prel | E11 Bogo-Indian Defense |
| 21. I Kanko vs W Schmidt |
| ½-½ | 45 |
1971 |
EU-chT prel | D76 Neo-Grunfeld, 6.cd Nxd5, 7.O-O Nb6 |
| 22. I Kanko vs A Kiviaho |
 | 1-0 | 28 |
1975 |
Helsinki | D45 Queen's Gambit Declined Semi-Slav |
| 23. E Hintikka vs I Kanko |
 | 1-0 | 21 |
1981 |
FIN jub20 corr8184 | B44 Sicilian |
| 24. G Timmerman vs I Kanko |
| 1-0 | 31 |
1986 |
FRG jub40 corr8692 | B46 Sicilian, Taimanov Variation |
| 25. I Kanko vs I Nei |
| 1-0 | 29 |
1989 |
Helsinki | D20 Queen's Gambit Accepted |