| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. A Planinc vs P Ostojic |
 | 1-0 | 25 | 1965 | Yugoslav Championship | B88 Sicilian, Fischer-Sozin Attack |
| 52. P Ostojic vs D Djurovic |
| ½-½ | 83 | 1965 | Yugoslav Championship | B84 Sicilian, Scheveningen |
| 53. P Ostojic vs P Dely |
| ½-½ | 15 | 1965 | Belgrade | C97 Ruy Lopez, Closed, Chigorin |
| 54. P Ostojic vs B Milic |
| ½-½ | 34 | 1965 | Belgrade | B88 Sicilian, Fischer-Sozin Attack |
| 55. Velimirovic vs P Ostojic |
| 0-1 | 57 | 1965 | Belgrade | B27 Sicilian |
| 56. N Karaklajic vs P Ostojic |
| 0-1 | 65 | 1965 | Belgrade | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 57. G Tringov vs P Ostojic |
| 1-0 | 36 | 1965 | Belgrade | C91 Ruy Lopez, Closed |
| 58. P Ostojic vs J Flesch |
| 0-1 | 30 | 1965 | Belgrade | B43 Sicilian, Kan, 5.Nc3 |
| 59. P Ostojic vs Kavalek |
| 1-0 | 26 | 1965 | Belgrade | B93 Sicilian, Najdorf, 6.f4 |
| 60. P Ostojic vs Matulovic |
| ½-½ | 24 | 1965 | Belgrade | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 61. D Minic vs P Ostojic |
| ½-½ | 12 | 1965 | Belgrade | B27 Sicilian |
| 62. T Rakic vs P Ostojic |
| ½-½ | 53 | 1965 | Belgrade | D03 Torre Attack (Tartakower Variation) |
| 63. Gheorghiu vs P Ostojic |
| 1-0 | 60 | 1965 | Belgrade | D25 Queen's Gambit Accepted |
| 64. V Sokolov vs P Ostojic |
| 1-0 | 40 | 1965 | Belgrade | D34 Queen's Gambit Declined, Tarrasch |
| 65. P Ostojic vs Sliwa |
| 1-0 | 39 | 1965 | Belgrade | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 66. P Ostojic vs N Gaprindashvili |
| 1-0 | 39 | 1966 | Hoogovens-B | B43 Sicilian, Kan, 5.Nc3 |
| 67. P Ostojic vs P Smederevac |
| ½-½ | 41 | 1966 | Hoogovens-B | C05 French, Tarrasch |
| 68. E Gereben vs P Ostojic |
| ½-½ | 50 | 1966 | Hoogovens-B | A05 Reti Opening |
| 69. P Ostojic vs A Waltemathe |
| 1-0 | 29 | 1966 | Hoogovens-B | B32 Sicilian |
| 70. H Ree vs P Ostojic |
| ½-½ | 59 | 1966 | Hoogovens-B | A13 English |
| 71. P Ostojic vs A Jongsma |
| ½-½ | 49 | 1966 | Hoogovens-B | B32 Sicilian |
| 72. A Beni vs P Ostojic |
| 0-1 | 31 | 1966 | Hoogovens-B | E62 King's Indian, Fianchetto |
| 73. P Ostojic vs T Ghitescu |
| ½-½ | 40 | 1966 | Hoogovens-B | C79 Ruy Lopez, Steinitz Defense Deferred |
| 74. B Sandor vs P Ostojic |
| ½-½ | 28 | 1966 | Hoogovens-B | D34 Queen's Gambit Declined, Tarrasch |
| 75. P Ostojic vs Westerinen |
| ½-½ | 31 | 1966 | Hoogovens-B | C91 Ruy Lopez, Closed |
Kibitzing
