| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. Westerinen vs S Arkhipov |
 | 0-1 | 14 | 1973 | Fonyad | C33 King's Gambit Accepted |
| 2. Westerinen vs M Tseitlin |
| ½-½ | 47 | 1982 | Moscow | C33 King's Gambit Accepted |
| 3. Westerinen vs Unzicker |
| ½-½ | 18 | 1982 | Moscow | C33 King's Gambit Accepted |
| 4. Westerinen vs S Arkhipov |
| 0-1 | 14 | 1983 | HUN | C33 King's Gambit Accepted |
| 5. Westerinen vs R Huerta |
| ½-½ | 51 | 1985 | Havana | C33 King's Gambit Accepted |
| 6. Westerinen vs O C Moen |
| 1-0 | 40 | 1985 | Gausdal Zonal | C33 King's Gambit Accepted |
| 7. Westerinen vs O A Lundeby |
| ½-½ | 36 | 1987 | Gausdal Int | C33 King's Gambit Accepted |
| 8. Westerinen vs J Hector |
| 1-0 | 44 | 1987 | Espergaerde | C33 King's Gambit Accepted |
| 9. Westerinen vs G Timmerman |
| 1-0 | 67 | 1987 | Dutch Open | C33 King's Gambit Accepted |
| 10. Westerinen vs M Rolvag |
| 1-0 | 23 | 1988 | Gausdal Jarl | C33 King's Gambit Accepted |
| 11. Westerinen vs T Wedberg |
| ½-½ | 47 | 1988 | Malmo Schacknytt 1988/89 | C33 King's Gambit Accepted |
| 12. Westerinen vs Forintos |
| ½-½ | 21 | 1988 | Malmo Schacknytt 1988/89 | C33 King's Gambit Accepted |
| 13. Westerinen vs B Lengyel |
| 1-0 | 24 | 1988 | Arnold Cup | C33 King's Gambit Accepted |
| 14. Westerinen vs H Wegner |
| ½-½ | 18 | 1988 | Copenhagen Open | C33 King's Gambit Accepted |
| 15. Westerinen vs M Hebden |
| 1-0 | 36 | 1988 | NatWest Young Masters | C33 King's Gambit Accepted |
| 16. Westerinen vs Y Kraidman |
| 0-1 | 84 | 1988 | Duncan Lawrie | C33 King's Gambit Accepted |
| 17. Westerinen vs J Franzen |
| 1-0 | 15 | 1988 | GMA-JAT Open | C33 King's Gambit Accepted |
| 18. Westerinen vs A Kuzmin |
| ½-½ | 18 | 1989 | Moscow-B | C33 King's Gambit Accepted |
| 19. Westerinen vs D Bokan |
| 1-0 | 53 | 1989 | Moscow1 | C33 King's Gambit Accepted |
| 20. Westerinen vs T Wedberg |
| 0-1 | 62 | 1989 | Espoo Zonal | C33 King's Gambit Accepted |
| 21. Westerinen vs J Hector |
| 1-0 | 50 | 1989 | Gausdal | C33 King's Gambit Accepted |
| 22. Westerinen vs E Arlandi |
| ½-½ | 36 | 1989 | EUR-chT (Open) 9th | C33 King's Gambit Accepted |
| 23. Westerinen vs I Abdelnabbi |
| ½-½ | 44 | 1990 | Novi Sad Olympiad | C33 King's Gambit Accepted |
| 24. Westerinen vs T Ernst |
| 0-1 | 38 | 1991 | FIN-SVE Helsinki 2 | C33 King's Gambit Accepted |
| 25. Westerinen vs A P Law |
| ½-½ | 8 | 1991 | Arnold Cup | C33 King's Gambit Accepted |
Kibitzing
