| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Hort vs H Westerinen |
| 1-0 | 27 |
1966 |
Orebro Stud olm fA | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 2. Matulovic vs H Westerinen |
| ½-½ | 42 |
1967 |
Halle zt | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 3. O'Kelly vs H Westerinen |
| 1-0 | 49 |
1967 |
Malaga (Spain) | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 4. F Kuijpers vs H Westerinen |
| ½-½ | 41 |
1967 |
Halle zt | C80 Ruy Lopez, Open |
| 5. Keres vs H Westerinen |
| ½-½ | 58 |
1968 |
Helsinki FIN-EST (18.05.68) | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 6. Keres vs H Westerinen |
| 1-0 | 50 |
1969 |
Tallinn EST-FIN (02.05.69) Inf7/281 | C93 Ruy Lopez, Closed, Smyslov Defense |
| 7. Adorjan vs H Westerinen |
| 0-1 | 40 |
1970 |
Amsterdam IBM II | C78 Ruy Lopez |
| 8. M Damjanovic vs H Westerinen |
| ½-½ | 46 |
1971 |
FRG-ch int | C74 Ruy Lopez, Modern Steinitz Defense |
| 9. A Matanovic vs H Westerinen |
| 0-1 | 48 |
1971 |
FRG-ch int | C73 Ruy Lopez, Modern Steinitz Defense |
| 10. Hecht vs H Westerinen |
| ½-½ | 42 |
1971 |
FRG-ch int | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 11. Browne vs H Westerinen |
| 0-1 | 37 |
1972 |
Skopje/Krusevo/Ohrid (Yugoslavia) | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 12. Matulovic vs H Westerinen |
| ½-½ | 63 |
1972 |
Helsinki | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 13. Gheorghiu vs H Westerinen |
| 1-0 | 52 |
1972 |
Helsinki | C78 Ruy Lopez |
| 14. Spassky vs H Westerinen |
| 1-0 | 33 |
1973 |
Dortmund | C73 Ruy Lopez, Modern Steinitz Defense |
| 15. Parma vs H Westerinen |
| ½-½ | 63 |
1973 |
Dortmund (Germany) | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 16. Keres vs H Westerinen |
| ½-½ | 49 |
1973 |
Dortmund (02.06.73) | C87 Ruy Lopez |
| 17. Ljubojevic vs H Westerinen |
 | 0-1 | 37 |
1974 |
21st olm qual.group 3 | C87 Ruy Lopez |
| 18. Tseshkovsky vs H Westerinen |
| ½-½ | 49 |
1974 |
Bucharest | C71 Ruy Lopez |
| 19. Karpov vs H Westerinen |
 | 1-0 | 34 |
1974 |
10, Nice ol | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 20. Kholmov vs H Westerinen |
 | 0-1 | 88 |
1974 |
Sochi | C78 Ruy Lopez |
| 21. Spassky vs H Westerinen |
 | 0-1 | 57 |
1974 |
Solingen | C73 Ruy Lopez, Modern Steinitz Defense |
| 22. Pinter vs H Westerinen |
| ½-½ | 29 |
1976 |
It (open) | C68 Ruy Lopez, Exchange |
| 23. Razuvaev vs H Westerinen |
| ½-½ | 24 |
1976 |
EUCup final | C88 Ruy Lopez |
| 24. N Povah vs H Westerinen |
| 1-0 | 54 |
1978 |
Lloyds Bank | C73 Ruy Lopez, Modern Steinitz Defense |
| 25. Chandler vs H Westerinen |
| ½-½ | 37 |
1978 |
? | C73 Ruy Lopez, Modern Steinitz Defense |