Game |
| Result | Moves |
Year | Event/Locale | Opening |
1. J Penrose vs H Heikkila |
| 1-0 | 56 | 1953 | World Junior Championship qual-2 | B59 Sicilian, Boleslavsky Variation, 7.Nb3 |
2. H Heikkila vs B Petri |
| ½-½ | 61 | 1953 | World Junior Championship qual-2 | A52 Budapest Gambit |
3. M Farre vs H Heikkila |
| 1-0 | 20 | 1953 | World Junior Championship qual-2 | B65 Sicilian, Richter-Rauzer Attack, 7...Be7 Defense, 9...Nxd4 |
4. Larsen vs H Heikkila |
| 1-0 | 40 | 1953 | World Junior Championship qual-2 | B31 Sicilian, Rossolimo Variation |
5. H Heikkila vs J Sherwin |
| 0-1 | 42 | 1953 | World Junior Championship qual-2 | D99 Grunfeld Defense, Smyslov |
6. J Herbin vs H Heikkila |
| ½-½ | 19 | 1953 | World Junior Championship qual-2 | E19 Queen's Indian, Old Main line, 9.Qxc3 |
7. H Heikkila vs F Scafarelli |
| 1-0 | 27 | 1953 | World Junior Championship qual-2 | D42 Queen's Gambit Declined, Semi-Tarrasch, 7.Bd3 |
8. K Darga vs H Heikkila |
 | 1-0 | 14 | 1953 | World Junior Championship qual-2 | B10 Caro-Kann |
9. H Heikkila vs F Roessel |
| 0-1 | 19 | 1953 | World Junior Championship qual-2 | E72 King's Indian |
10. R Persitz vs H Heikkila |
| 1-0 | 24 | 1953 | World Junior Championship Final-B | A07 King's Indian Attack |
11. H Heikkila vs Y Barda |
| 1-0 | 56 | 1953 | World Junior Championship Final-B | D96 Grunfeld, Russian Variation |
12. H Heikkila vs J M Boey |
| 1-0 | 26 | 1953 | World Junior Championship Final-B | E72 King's Indian |
13. R Siemms vs H Heikkila |
| 0-1 | 42 | 1953 | World Junior Championship Final-B | B59 Sicilian, Boleslavsky Variation, 7.Nb3 |
14. E Reichel vs H Heikkila |
| ½-½ | 13 | 1953 | World Junior Championship Final-B | D60 Queen's Gambit Declined, Orthodox Defense |
15. H Heikkila vs F Scafarelli |
| ½-½ | 12 | 1953 | World Junior Championship Final-B | D50 Queen's Gambit Declined |
16. W Mikenda vs H Heikkila |
| ½-½ | 59 | 1970 | WchT U26 17th | E75 King's Indian, Averbakh, Main line |
17. H Heikkila vs R Verber |
| ½-½ | 100 | 1970 | WchT U26 17th | B25 Sicilian, Closed |
18. H Heikkila vs J Juhnke |
| ½-½ | 40 | 1970 | WchT U26 17th | B25 Sicilian, Closed |
19. D A Watt vs H Heikkila |
| 1-0 | 37 | 1970 | WchT U26 17th | B09 Pirc, Austrian Attack |
20. H Heikkila vs A Koski |
| 0-1 | 67 | 1970 | WchT U26 17th | C53 Giuoco Piano |
21. J Wieweg vs H Heikkila |
| 1-0 | 29 | 1970 | WchT U26 17th | B09 Pirc, Austrian Attack |
22. H Heikkila vs B Kristjansson |
| ½-½ | 36 | 1970 | WchT U26 17th | A07 King's Indian Attack |
23. H Heikkila vs M Weise |
| 0-1 | 59 | 1995 | Hessenliga | C05 French, Tarrasch |
24. H Heikkila vs F Stimpel |
| 0-1 | 25 | 1995 | Hessenliga | A53 Old Indian |
25. J Esterluss vs H Heikkila |
| ½-½ | 13 | 1995 | Hessenliga | B82 Sicilian, Scheveningen |