| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. Schussler vs Y Rantanen |
 | 1-0 | 31 |
1977 |
Stockholm | C68 Ruy Lopez, Exchange |
| 27. Y Rantanen vs Shamkovich |
| 0-1 | 64 |
1978 |
Lloyds Bank | B43 Sicilian, Kan, 5.Nc3 |
| 28. Larry Evans vs Y Rantanen |
| ½-½ | 68 |
1978 |
Lloyds Bank | C68 Ruy Lopez, Exchange |
| 29. S Bouaziz vs Y Rantanen |
| ½-½ | 22 |
1978 |
Lloyds Bank | C68 Ruy Lopez, Exchange |
| 30. S Berry vs Y Rantanen |
| 0-1 | 36 |
1978 |
Lloyds Bank | C70 Ruy Lopez |
| 31. Sosonko vs Y Rantanen |
| ½-½ | 22 |
1978 |
Buenos Aires olm | A99 Dutch, Ilyin-Genevsky Variation with b3 |
| 32. Y Rantanen vs J Peters |
| 1-0 | 43 |
1978 |
Lloyds Bank | B82 Sicilian, Scheveningen |
| 33. Y Rantanen vs P Littlewood |
| ½-½ | 38 |
1978 |
Lloyds Bank | C91 Ruy Lopez, Closed |
| 34. Y Rantanen vs A J Whiteley |
| 1-0 | 42 |
1978 |
Kringsja | C18 French, Winawer |
| 35. J L Watson vs Y Rantanen |
| 0-1 | 63 |
1978 |
Lloyds Bank | A19 English, Mikenas-Carls, Sicilian Variation |
| 36. Y Rantanen vs D Friedgood |
 | 1-0 | 40 |
1978 |
Lloyds Bank | B46 Sicilian, Taimanov Variation |
| 37. Y Rantanen vs Shamkovich |
| 0-1 | 56 |
1978 |
London (England) | B82 Sicilian, Scheveningen |
| 38. M Basman vs Y Rantanen |
| 0-1 | 25 |
1978 |
London LB | C34 King's Gambit Accepted |
| 39. Y Rantanen vs N Povah |
| 1-0 | 24 |
1978 |
Lloyds Bank | B40 Sicilian |
| 40. Y Rantanen vs R Knaak |
| 0-1 | 46 |
1979 |
Tallinn Keres mem EST | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 41. Y Rantanen vs A Vooremaa |
| ½-½ | 41 |
1979 |
Tallinn Keres mem EST | C12 French, McCutcheon |
| 42. Bronstein vs Y Rantanen |
| ½-½ | 56 |
1979 |
It (cat.11) | B37 Sicilian, Accelerated Fianchetto |
| 43. Y Rantanen vs I Nei |
| ½-½ | 26 |
1979 |
Tallinn Keres mem EST | C91 Ruy Lopez, Closed |
| 44. B Rytov vs Y Rantanen |
| 1-0 | 34 |
1979 |
Tallinn Keres mem EST | A04 Reti Opening |
| 45. Y Rantanen vs B Ivanovic |
| 1-0 | 31 |
1979 |
Tallinn Keres mem EST | B45 Sicilian, Taimanov |
| 46. Sax vs Y Rantanen |
| 1-0 | 62 |
1979 |
Tallinn Keres mem EST | C75 Ruy Lopez, Modern Steinitz Defense |
| 47. Y Rantanen vs Christiansen |
| 0-1 | 32 |
1979 |
It (cat.11) | B14 Caro-Kann, Panov-Botvinnik Attack |
| 48. Hartston vs Y Rantanen |
| 1-0 | 58 |
1979 |
Tallinn Keres mem EST | D30 Queen's Gambit Declined |
| 49. Y Rantanen vs Vaganian |
| 0-1 | 44 |
1979 |
Tallinn | C19 French, Winawer, Advance |
| 50. Y Rantanen vs Keene |
 | 0-1 | 40 |
1979 |
Gausdal (Norway) | B07 Pirc |