| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Y Rantanen vs B Denman |
| 1-0 | 20 |
1972 |
Skopje | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 2. Y Rantanen vs S Fedder |
| 0-1 | 40 |
1973 |
Ribe 6 Nations chT | B96 Sicilian, Najdorf |
| 3. Y Rantanen vs Reshevsky |
| 0-1 | 24 |
1974 |
Olympiad (Finals) | B89 Sicilian |
| 4. Y Rantanen vs Shamkovich |
| 0-1 | 64 |
1978 |
Lloyds Bank | B43 Sicilian, Kan, 5.Nc3 |
| 5. Y Rantanen vs J Peters |
| 1-0 | 43 |
1978 |
Lloyds Bank | B82 Sicilian, Scheveningen |
| 6. Y Rantanen vs N Povah |
| 1-0 | 24 |
1978 |
Lloyds Bank | B40 Sicilian |
| 7. Y Rantanen vs Shamkovich |
| 0-1 | 56 |
1978 |
London (England) | B82 Sicilian, Scheveningen |
| 8. Y Rantanen vs D Friedgood |
 | 1-0 | 40 |
1978 |
Lloyds Bank | B46 Sicilian, Taimanov Variation |
| 9. Y Rantanen vs B Ivanovic |
| 1-0 | 31 |
1979 |
Tallinn Keres mem EST | B45 Sicilian, Taimanov |
| 10. Y Rantanen vs A Veingold |
| 0-1 | 32 |
1979 |
Tallinn Keres mem EST | B83 Sicilian |
| 11. Y Rantanen vs Quinteros |
| 1-0 | 39 |
1980 |
Malta | B93 Sicilian, Najdorf, 6.f4 |
| 12. Y Rantanen vs L Spassov |
| 1-0 | 37 |
1981 |
9. Eksjo SK | B93 Sicilian, Najdorf, 6.f4 |
| 13. Y Rantanen vs Nunn |
| ½-½ | 22 |
1981 |
Helsinki | B93 Sicilian, Najdorf, 6.f4 |
| 14. Y Rantanen vs K Helmers |
| ½-½ | 55 |
1982 |
Randers | B93 Sicilian, Najdorf, 6.f4 |
| 15. Y Rantanen vs A Kuligowski |
| ½-½ | 43 |
1983 |
Poutiainen mem | B93 Sicilian, Najdorf, 6.f4 |
| 16. Y Rantanen vs V Tukmakov |
| ½-½ | 40 |
1983 |
Poutiainen mem | B56 Sicilian |
| 17. Y Rantanen vs Balashov |
| 0-1 | 42 |
1984 |
Helsinki | B60 Sicilian, Richter-Rauzer |
| 18. Y Rantanen vs L Karlsson |
| 1-0 | 42 |
1986 |
Oslo | B71 Sicilian, Dragon, Levenfish Variation |
| 19. Y Rantanen vs Antti Loisa |
| 1-0 | 41 |
1987 |
Jyvaskyla | B93 Sicilian, Najdorf, 6.f4 |
| 20. Y Rantanen vs Mednis |
| ½-½ | 46 |
1988 |
Belgrade GMA Open | B83 Sicilian |
| 21. Y Rantanen vs D Kosic |
| ½-½ | 32 |
1988 |
Belgrade GMA Open | B82 Sicilian, Scheveningen |
| 22. Y Rantanen vs E Dizdarevic |
| 1-0 | 63 |
1988 |
Belgrade GMA Open | B42 Sicilian, Kan |
| 23. Y Rantanen vs Marinelli Tullio |
| 1-0 | 37 |
1989 |
EU-chT (Men) | B90 Sicilian, Najdorf |
| 24. Y Rantanen vs O Cvitan |
| 0-1 | 41 |
1989 |
EU-chT (Men) | B42 Sicilian, Kan |
| 25. Y Rantanen vs U Raisa |
| ½-½ | 41 |
2000 |
10th Open | B82 Sicilian, Scheveningen |