| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. H Pfleger vs H Westerinen |
| 1-0 | 56 |
1961 |
Wch U20 | E73 King's Indian |
| 2. M Czerniak vs H Westerinen |
| 1-0 | 50 |
1962 |
Varna ol (Men) | C00 French Defense |
| 3. W Schmidt vs H Westerinen |
| 1-0 | 33 |
1962 |
Varna ol (Men) | B14 Caro-Kann, Panov-Botvinnik Attack |
| 4. Robatsch vs H Westerinen |
| 1-0 | 23 |
1963 |
Halle zt | B57 Sicilian |
| 5. H Westerinen vs Doda |
 | 1-0 | 41 |
1963 |
Halle | B42 Sicilian, Kan |
| 6. Larsen vs H Westerinen |
| 1-0 | 43 |
1963 |
Halle | B57 Sicilian |
| 7. S Johannessen vs H Westerinen |
| 1-0 | 30 |
1963 |
Halle | E62 King's Indian, Fianchetto |
| 8. Ivkov vs H Westerinen |
| 1-0 | 32 |
1963 |
Halle | B77 Sicilian, Dragon, Yugoslav Attack |
| 9. S Hamann vs H Westerinen |
| 1-0 | 45 |
1963 |
Halle | B73 Sicilian, Dragon, Classical |
| 10. H Westerinen vs Minev |
| 1-0 | 40 |
1963 |
Halle | B97 Sicilian, Najdorf |
| 11. H Westerinen vs A Hollis |
| 1-0 | 31 |
1964 |
WchT U26 11th qual-B | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
| 12. S Briem vs H Westerinen |
| 1-0 | 46 |
1964 |
WchT U26 11th fin-B | C20 King's Pawn Game |
| 13. A Niemela vs H Westerinen |
| 1-0 | 41 |
1964 |
FIN-Ch | E83 King's Indian, Samisch |
| 14. A Hollis vs H Westerinen |
| 1-0 | 46 |
1964 |
WchT U26 11th fin-B | E60 King's Indian Defense |
| 15. I Polgar vs H Westerinen |
| 1-0 | 47 |
1966 |
Orebro Stud olm fA | E75 King's Indian, Averbakh, Main line |
| 16. Book vs H Westerinen |
| 1-0 | 33 |
1966 |
Helsinki | A04 Reti Opening |
| 17. Hort vs H Westerinen |
| 1-0 | 27 |
1966 |
Orebro Stud olm fA | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 18. H Westerinen vs Tringov |
| 1-0 | 40 |
1966 |
La Habana ol (Men) prel | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
| 19. Gheorghiu vs H Westerinen |
| 1-0 | 36 |
1966 |
Orebro Stud olm fA | B32 Sicilian |
| 20. Spiridonov vs H Westerinen |
| 1-0 | 50 |
1966 |
Orebro Stud olm fA | A15 English |
| 21. H Westerinen vs B Brinck-Claussen |
| 1-0 | 41 |
1966 |
Orebro Stud olm fA | A56 Benoni Defense |
| 22. Filip vs H Westerinen |
| 1-0 | 35 |
1967 |
Capablanca mem | A20 English |
| 23. Taimanov vs H Westerinen |
| 1-0 | 41 |
1967 |
Havana | D23 Queen's Gambit Accepted |
| 24. O'Kelly vs H Westerinen |
| 1-0 | 49 |
1967 |
Malaga (Spain) | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 25. H Westerinen vs Minev |
| 1-0 | 44 |
1967 |
Halle zt | C67 Ruy Lopez |
