| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. B Jacobsen vs T Ristoja |
| 1-0 | 16 | 1970 | Niemeyer Juniors 1969/70 | A00 Uncommon Opening |
| 27. T Ristoja vs A Urzica |
| 0-1 | 35 | 1970 | Niemeyer Juniors 1969/70 | C46 Three Knights |
| 28. A Beliavsky vs T Ristoja |
| 1-0 | 38 | 1970 | Niemeyer Juniors 1969/70 | D44 Queen's Gambit Declined Semi-Slav |
| 29. J Bellon Lopez vs T Ristoja |
| ½-½ | 48 | 1970 | Niemeyer Juniors 1969/70 | C29 Vienna Gambit |
| 30. T Ristoja vs C Pritchett |
| 0-1 | 43 | 1970 | Niemeyer Juniors 1969/70 | C49 Four Knights |
| 31. Adorjan vs T Ristoja |
| 1-0 | 29 | 1970 | Niemeyer Juniors 1969/70 | A42 Modern Defense, Averbakh System |
| 32. T Ristoja vs R Eales |
| ½-½ | 14 | 1970 | Niemeyer Juniors 1969/70 | B08 Pirc, Classical |
| 33. A Malachi vs T Ristoja |
| ½-½ | 57 | 1970 | WchT U26 17th | A07 King's Indian Attack |
| 34. G D Pearce vs T Ristoja |
| ½-½ | 34 | 1974 | World Student Team Championship qual-1 | E92 King's Indian |
| 35. S Palatnik vs T Ristoja |
| 1-0 | 33 | 1974 | World Student Team Championship qual-1 | E75 King's Indian, Averbakh, Main line |
| 36. T Ristoja vs J Fridjonsson |
| ½-½ | 26 | 1974 | World Student Team Championship qual-1 | B82 Sicilian, Scheveningen |
| 37. M Ito vs T Ristoja |
| 0-1 | 37 | 1974 | World Student Team Championship qual-1 | E62 King's Indian, Fianchetto |
| 38. H Rolletschek vs T Ristoja |
| 1-0 | 54 | 1974 | World Student Team Championship Final-A | A07 King's Indian Attack |
| 39. T Ristoja vs J Ost-Hansen |
| 0-1 | 39 | 1974 | World Student Team Championship Final-A | B42 Sicilian, Kan |
| 40. C Baljon vs T Ristoja |
| 0-1 | 24 | 1974 | World Student Team Championship Final-A | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 41. T Ristoja vs R Eales |
| 0-1 | 45 | 1974 | World Student Team Championship Final-A | D90 Grunfeld |
| 42. J N Jacobs vs T Ristoja |
| 0-1 | 41 | 1974 | World Student Team Championship Final-A | B22 Sicilian, Alapin |
| 43. J Pinter vs T Ristoja |
| 1-0 | 77 | 1974 | World Student Team Championship Final-A | C77 Ruy Lopez |
| 44. T Ristoja vs Kupreichik |
| 0-1 | 31 | 1974 | World Student Team Championship Final-A | B72 Sicilian, Dragon |
| 45. S Buchal vs T Ristoja |
| 0-1 | 41 | 1974 | World Student Team Championship Final-A | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 46. T Ristoja vs P Poutiainen |
| 0-1 | 36 | 1976 | Helsinki | B69 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 11.Bxf6 |
| 47. T Ristoja vs I Asmundsson |
| ½-½ | 9 | 1977 | Gluecksburg tt | C43 Petrov, Modern Attack |
| 48. T Ristoja vs H Dobosz |
| ½-½ | 51 | 1978 | Telechess ol1 7778 | B33 Sicilian |
| 49. A Kiviaho vs T Ristoja |
 | 0-1 | 29 | 1979 | Helsinki | E97 King's Indian |
| 50. T Ristoja vs H Hurme |
| 0-1 | 35 | 1979 | Kaarle Ojanen 60 | B32 Sicilian |
Kibitzing
