| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. I Radulov vs P Petkov |
| 1-0 | 41 | 1961 | Bulgarian Championship | A15 English |
| 52. A Filipowicz vs P Petkov |
| 1-0 | 49 | 1968 | Allied Armies Team Championship | C77 Ruy Lopez |
| 53. G Minchev vs P Petkov |
 | 1-0 | 19 | 1986 | Sofia | A40 Queen's Pawn Game |
| 54. H Klarenbeek vs P Petkov |
| 1-0 | 37 | 1993 | Cappelle Open | E16 Queen's Indian |
| 55. O Todorov vs P Petkov |
| ½-½ | 19 | 1993 | Cappelle Open | C79 Ruy Lopez, Steinitz Defense Deferred |
| 56. P Petkov vs D Dumitrache |
| 0-1 | 24 | 1993 | Cappelle Open | A56 Benoni Defense |
| 57. P Petkov vs O Krivonosov |
| ½-½ | 53 | 1993 | Cappelle Open | D55 Queen's Gambit Declined |
Kibitzing
