| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. I Johannsson vs J Kristinsson |
| ½-½ | 40 | 1964 | Reykjavik | E59 Nimzo-Indian, 4.e3, Main line |
| 27. J Kristinsson vs M Solmundarson |
| ½-½ | 49 | 1964 | Reykjavik | C97 Ruy Lopez, Closed, Chigorin |
| 28. J Kristinsson vs J Deslauriers |
| 1-0 | 69 | 1964 | Tel Aviv Olympiad qual-6 | D24 Queen's Gambit Accepted |
| 29. R Fuchs vs J Kristinsson |
| 1-0 | 56 | 1964 | Tel Aviv Olympiad qual-6 | B32 Sicilian |
| 30. J Kristinsson vs E Macskasy |
| ½-½ | 40 | 1964 | Tel Aviv Olympiad qual-6 | D59 Queen's Gambit Declined, Tartakower |
| 31. J Kristinsson vs P Murphy |
| 1-0 | 39 | 1964 | Tel Aviv Olympiad Final-C | A39 English, Symmetrical, Main line with d4 |
| 32. G Hernandez vs J Kristinsson |
| 0-1 | 33 | 1964 | Tel Aviv Olympiad Final-C | B32 Sicilian |
| 33. I Niemela vs J Kristinsson |
 | 1-0 | 39 | 1964 | Tel Aviv Olympiad Final-C | D83 Grunfeld, Grunfeld Gambit |
| 34. J Kristinsson vs Y Safvat |
| 1-0 | 23 | 1964 | Tel Aviv Olympiad Final-C | E29 Nimzo-Indian, Samisch |
| 35. J Kristinsson vs C Cuartas |
| 1-0 | 54 | 1964 | Tel Aviv Olympiad Final-C | A34 English, Symmetrical |
| 36. Vasiukov vs J Kristinsson |
| 1-0 | 58 | 1966 | Reykjavik | C93 Ruy Lopez, Closed, Smyslov Defense |
| 37. G Palmason vs J Kristinsson |
| ½-½ | 27 | 1966 | Reykjavik | E97 King's Indian |
| 38. J Kristinsson vs F Thorbergsson |
| ½-½ | 23 | 1966 | Reykjavik | E41 Nimzo-Indian |
| 39. J Halfdanarson vs J Kristinsson |
| 0-1 | 38 | 1966 | Reykjavik | E81 King's Indian, Samisch |
| 40. J Kristinsson vs R G Wade |
| ½-½ | 49 | 1966 | Reykjavik | A33 English, Symmetrical |
| 41. G Kieninger vs J Kristinsson |
| 1-0 | 51 | 1966 | Reykjavik | B20 Sicilian |
| 42. J Kristinsson vs G Sigurjonsson |
| 1-0 | 70 | 1966 | Reykjavik | D91 Grunfeld, 5.Bg5 |
| 43. E Book vs J Kristinsson |
| ½-½ | 21 | 1966 | Reykjavik | A07 King's Indian Attack |
| 44. J Kristinsson vs O'Kelly |
| 0-1 | 34 | 1966 | Reykjavik | B48 Sicilian, Taimanov Variation |
| 45. B Thorsteinsson vs J Kristinsson |
| ½-½ | 34 | 1966 | Reykjavik | C59 Two Knights |
| 46. J Kristinsson vs F Olafsson |
| 0-1 | 24 | 1966 | Reykjavik | E70 King's Indian |
| 47. J Kristinsson vs D Minic |
| 1-0 | 36 | 1967 | Halle Zonal | A44 Old Benoni Defense |
| 48. J Kristinsson vs F Kuijpers |
| 0-1 | 41 | 1967 | Halle Zonal | E43 Nimzo-Indian, Fischer Variation |
| 49. B Pietrusiak vs J Kristinsson |
| 0-1 | 81 | 1967 | Halle Zonal | C44 King's Pawn Game |
| 50. Uhlmann vs J Kristinsson |
| 1-0 | 41 | 1967 | Halle Zonal | D97 Grunfeld, Russian |
Kibitzing
