| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. H Westerinen vs Doda |
 | 1-0 | 41 |
1963 |
Halle | B42 Sicilian, Kan |
| 2. M Pavlov vs H Westerinen |
| 0-1 | 40 |
1963 |
Halle | B77 Sicilian, Dragon, Yugoslav Attack |
| 3. O Kinnmark vs H Westerinen |
| 0-1 | 50 |
1963 |
Halle | B57 Sicilian |
| 4. A Kiviaho vs H Westerinen |
| 0-1 | 26 |
1963 |
Helsinki | E83 King's Indian, Samisch |
| 5. I Kanko vs H Westerinen |
| 0-1 | 34 |
1963 |
Halle | A71 Benoni, Classical, 8.Bg5 |
| 6. H Westerinen vs Minev |
| 1-0 | 40 |
1963 |
Halle | B97 Sicilian, Najdorf |
| 7. H Westerinen vs A Hollis |
| 1-0 | 31 |
1964 |
WchT U26 11th qual-B | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
| 8. A Hennings vs H Westerinen |
| 0-1 | 31 |
1966 |
Orebro Stud olm fA | B32 Sicilian |
| 9. H Westerinen vs B Brinck-Claussen |
| 1-0 | 41 |
1966 |
Orebro Stud olm fA | A56 Benoni Defense |
| 10. Hartston vs H Westerinen |
| 0-1 | 37 |
1966 |
Havana Olympiad | B79 Sicilian, Dragon, Yugoslav Attack, 12.h4 |
| 11. P N Lee vs H Westerinen |
| 0-1 | 66 |
1966 |
Orebro Stud olm fA | B09 Pirc, Austrian Attack |
| 12. H Westerinen vs Tringov |
| 1-0 | 40 |
1966 |
La Habana ol (Men) prel | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
| 13. H Westerinen vs O'Kelly |
| 1-0 | 28 |
1967 |
Olympiad | B97 Sicilian, Najdorf |
| 14. H Westerinen vs Minev |
| 1-0 | 44 |
1967 |
Halle zt | C67 Ruy Lopez |
| 15. H Westerinen vs Polugaevsky |
| 1-0 | 42 |
1967 |
Havana ol | B81 Sicilian, Scheveningen, Keres Attack |
| 16. D Byrne vs H Westerinen |
| 0-1 | 35 |
1968 |
Palma de Mallorca | A16 English |
| 17. H Westerinen vs Timman |
| 1-0 | 23 |
1968 |
The Hague | E83 King's Indian, Samisch |
| 18. H Westerinen vs R Calvo |
| 1-0 | 52 |
1968 |
Palma de Mallorca | C89 Ruy Lopez, Marshall |
| 19. H Westerinen vs Ivkov |
| 1-0 | 73 |
1968 |
Bamberg | B06 Robatsch |
| 20. Gligoric vs H Westerinen |
| 0-1 | 40 |
1968 |
Palma de Mallorca | E91 King's Indian |
| 21. H Westerinen vs Szabo |
| 1-0 | 23 |
1968 |
Bamberg | B56 Sicilian |
| 22. H Westerinen vs Benko |
| 1-0 | 43 |
1968 |
Palma de Mallorca | B06 Robatsch |
| 23. H Westerinen vs J Van Baarle |
| 1-0 | 41 |
1968 |
Meldorf U26 | B04 Alekhine's Defense, Modern |
| 24. H Westerinen vs M Bobotsov |
| 1-0 | 41 |
1968 |
Bamberg | B61 Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2 |
| 25. H Westerinen vs Mecking |
| 1-0 | 56 |
1968 |
Lugano finals | B08 Pirc, Classical |
