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| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. P Ostojic vs A A Bikhovsky |
| 1-0 | 37 | 1963 | Belgrade | C91 Ruy Lopez, Closed |
| 2. P Ostojic vs Westerinen |
| ½-½ | 31 | 1966 | Hoogovens-B | C91 Ruy Lopez, Closed |
| 3. P Ostojic vs R Hartoch |
| 1-0 | 75 | 1966 | Amsterdam IBM-B | C91 Ruy Lopez, Closed |
| 4. P Ostojic vs V Sokolov |
| ½-½ | 73 | 1967 | Belgrade Festival | C91 Ruy Lopez, Closed |
| 5. P Ostojic vs A Dunkelblum |
| ½-½ | 67 | 1968 | Hoogovens-B | C91 Ruy Lopez, Closed |
| 6. P Ostojic vs J H Donner |
| 0-1 | 35 | 1968 | Capablanca Memorial | C91 Ruy Lopez, Closed |
| 7. P Ostojic vs H Zoebisch |
| 1-0 | 26 | 1971 | Schlechter Memorial | C91 Ruy Lopez, Closed |
| 8. P Ostojic vs I Nemet |
| 0-1 | 53 | 1972 | Yugoslav Championship | C91 Ruy Lopez, Closed |
| 9. P Ostojic vs A Ornstein |
| ½-½ | 44 | 1976 | Yerevan | C91 Ruy Lopez, Closed |
| 10. P Ostojic vs L Spassov |
| 0-1 | 35 | 1977 | Budapest Tungsram | C91 Ruy Lopez, Closed |
| 11. P Ostojic vs Ivkov |
| ½-½ | 31 | 1978 | Yugoslav Championship | C91 Ruy Lopez, Closed |
| 12. P Ostojic vs L Kaufman |
| 0-1 | 24 | 1979 | Marshall Open | C91 Ruy Lopez, Closed |
| 13. P Ostojic vs D Strajnic |
| ½-½ | 46 | 1982 | Miroslav Bakic Memorial | C91 Ruy Lopez, Closed |
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Kibitzing
