| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. H Westerinen vs M Johansson Sr |
| ½-½ | 30 |
1963 |
Halle | B41 Sicilian, Kan |
| 2. H Westerinen vs I Johannsson |
| 0-1 | 41 |
1963 |
Halle | B33 Sicilian |
| 3. H Westerinen vs Doda |
 | 1-0 | 41 |
1963 |
Halle | B42 Sicilian, Kan |
| 4. H Westerinen vs Minev |
| 1-0 | 40 |
1963 |
Halle | B97 Sicilian, Najdorf |
| 5. H Westerinen vs B Malich |
| ½-½ | 30 |
1963 |
Halle | B60 Sicilian, Richter-Rauzer |
| 6. H Westerinen vs K Darga |
| 0-1 | 56 |
1964 |
Tel Aviv ol (Men) prel | B42 Sicilian, Kan |
| 7. H Westerinen vs A Hollis |
| 1-0 | 31 |
1964 |
WchT U26 11th qual-B | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
| 8. H Westerinen vs Kurajica |
| ½-½ | 20 |
1966 |
Orebro Stud olm fA | B42 Sicilian, Kan |
| 9. H Westerinen vs Tringov |
| 1-0 | 40 |
1966 |
La Habana ol (Men) prel | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
| 10. H Westerinen vs Savon |
| ½-½ | 74 |
1966 |
Orebro Stud olm fA | B42 Sicilian, Kan |
| 11. H Westerinen vs Savon |
| ½-½ | 32 |
1966 |
Orebro Stud olm prelim1 | B42 Sicilian, Kan |
| 12. H Westerinen vs Larsen |
| 0-1 | 25 |
1967 |
Capablanca mem | B54 Sicilian |
| 13. H Westerinen vs Polugaevsky |
| 1-0 | 42 |
1967 |
Havana ol | B81 Sicilian, Scheveningen, Keres Attack |
| 14. H Westerinen vs O'Kelly |
| 1-0 | 28 |
1967 |
Olympiad | B97 Sicilian, Najdorf |
| 15. H Westerinen vs Suetin |
| ½-½ | 41 |
1967 |
Leningrad | B44 Sicilian |
| 16. H Westerinen vs Bobotsov |
| 1-0 | 41 |
1968 |
Bamberg | B61 Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2 |
| 17. H Westerinen vs Szabo |
| 1-0 | 23 |
1968 |
Bamberg | B56 Sicilian |
| 18. H Westerinen vs H Lehmann |
| 0-1 | 37 |
1968 |
Palma de Mallorca | B90 Sicilian, Najdorf |
| 19. H Westerinen vs Janosevic |
| 1-0 | 54 |
1970 |
Wijk aan Zee I | B31 Sicilian, Rossolimo Variation |
| 20. H Westerinen vs Joop Piket |
| ½-½ | 40 |
1970 |
Amsterdam | B68 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 9...Be7 |
| 21. H Westerinen vs Taimanov |
| 0-1 | 58 |
1970 |
Wijk aan Zee | B49 Sicilian, Taimanov Variation |
| 22. H Westerinen vs Larry Evans |
| 0-1 | 41 |
1970 |
Siegen ol (Men) qual-C | B98 Sicilian, Najdorf |
| 23. H Westerinen vs Platonov |
| ½-½ | 48 |
1970 |
Beverwijk (Netherlands) | B53 Sicilian |
| 24. H Westerinen vs Saidy |
| 0-1 | 56 |
1971 |
Tallinn | B57 Sicilian |
| 25. H Westerinen vs Bobotsov |
| 1-0 | 66 |
1971 |
Venice | B80 Sicilian, Scheveningen |
