| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. Y Bleiman vs J Kolbak |
| 0-1 | 62 | 1965 | World Student Team Championship Final-A | D47 Queen's Gambit Declined Semi-Slav |
| 27. E Mnatsakanian vs J Kolbak |
| 1-0 | 72 | 1965 | World Student Team Championship Final-A | B18 Caro-Kann, Classical |
| 28. J Kolbak vs D Neukirch |
| 1-0 | 39 | 1965 | World Student Team Championship Final-A | E11 Bogo-Indian Defense |
| 29. M Pavlov vs J Kolbak |
| 1-0 | 31 | 1965 | World Student Team Championship Final-A | C61 Ruy Lopez, Bird's Defense |
| 30. J Kolbak vs M Basman |
| 1-0 | 30 | 1965 | World Student Team Championship Final-A | D44 Queen's Gambit Declined Semi-Slav |
| 31. I Polgar vs J Kolbak |
| 1-0 | 45 | 1965 | World Student Team Championship Final-A | B11 Caro-Kann, Two Knights, 3...Bg4 |
| 32. J Kolbak vs B Enklaar |
| 1-0 | 56 | 1965 | World Student Team Championship Final-A | E92 King's Indian |
| 33. S Bouaziz vs J Kolbak |
| 0-1 | 34 | 1966 | Orebro Stud olm prelim5 | B14 Caro-Kann, Panov-Botvinnik Attack |
| 34. J Kolbak vs P Mertens |
| 1-0 | 40 | 1966 | Orebro Stud olm prelim5 | E81 King's Indian, Samisch |
| 35. J Kolbak vs D Ghizdavu |
| ½-½ | 18 | 1966 | Orebro Stud olm fA | E16 Queen's Indian |
| 36. Plachetka vs J Kolbak |
 | 0-1 | 40 | 1966 | Orebro Stud olm fA | B14 Caro-Kann, Panov-Botvinnik Attack |
| 37. J Kolbak vs L Vadasz |
| ½-½ | 56 | 1966 | Orebro Stud olm fA | A53 Old Indian |
| 38. M Boehnisch vs J Kolbak |
| ½-½ | 28 | 1966 | Orebro Stud olm fA | B13 Caro-Kann, Exchange |
| 39. Gulko vs J Kolbak |
| 1-0 | 44 | 1966 | Orebro Stud olm fA | D34 Queen's Gambit Declined, Tarrasch |
| 40. J Kolbak vs Avner |
| ½-½ | 57 | 1966 | Orebro Stud olm fA | D25 Queen's Gambit Accepted |
| 41. M Cebalo vs J Kolbak |
| ½-½ | 50 | 1966 | Orebro Stud olm fA | D34 Queen's Gambit Declined, Tarrasch |
| 42. J Kolbak vs L Spassov |
| 1-0 | 40 | 1966 | Orebro Stud olm fA | E15 Queen's Indian |
| 43. J Kolbak vs Keene |
| 0-1 | 52 | 1967 | World Student Team Championship Final-A | A02 Bird's Opening |
| 44. J Kolbak vs M Schoeneberg |
| 1-0 | 41 | 1967 | World Student Team Championship Final-A | A03 Bird's Opening |
| 45. P M George vs J Kolbak |
| 0-1 | 58 | 1967 | World Student Team Championship qual-4 | A80 Dutch |
| 46. E Mozes vs J Kolbak |
| ½-½ | 27 | 1967 | World Student Team Championship Final-A | B11 Caro-Kann, Two Knights, 3...Bg4 |
| 47. J Trapl vs J Kolbak |
| 0-1 | 65 | 1967 | World Student Team Championship Final-A | A99 Dutch, Ilyin-Genevsky Variation with b3 |
| 48. A Whiteley vs J Kolbak |
| ½-½ | 15 | 1967 | World Student Team Championship qual-4 | A99 Dutch, Ilyin-Genevsky Variation with b3 |
| 49. M F Drew vs J Kolbak |
| 0-1 | 28 | 1967 | EU-chT (prelim) | B12 Caro-Kann Defense |
| 50. J Kolbak vs J Halfdanarson |
| 0-1 | 64 | 1968 | WchT U26 15th qual-D | A02 Bird's Opening |
Kibitzing
