| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. O Zierke vs G Jones |
| 0-1 | 36 | 2007 | Pula Open | D06 Queen's Gambit Declined |
| 27. O Zierke vs B Vasic |
| 1-0 | 56 | 2007 | Pula Open | A53 Old Indian |
| 28. D Stojanovski vs O Zierke |
| ½-½ | 23 | 2007 | Pula Open | B65 Sicilian, Richter-Rauzer Attack, 7...Be7 Defense, 9...Nxd4 |
| 29. O Zierke vs Saric |
| 0-1 | 36 | 2007 | Pula Open | E99 King's Indian, Orthodox, Taimanov |
| 30. O Zierke vs D Szoen |
| 0-1 | 59 | 2007 | Rewal op-A | D09 Queen's Gambit Declined, Albin Counter Gambit, 5.g3 |
| 31. O Zierke vs D Hausrath |
| 0-1 | 51 | 2009 | German Championship | E91 King's Indian |
| 32. S Siebrecht vs O Zierke |
| 1-0 | 36 | 2009 | German Championship | D32 Queen's Gambit Declined, Tarrasch |
| 33. O Zierke vs E Sternheimer |
| 1-0 | 35 | 2009 | German Championship | D28 Queen's Gambit Accepted, Classical |
| 34. R Hundack vs O Zierke |
| 0-1 | 41 | 2009 | German Championship | A30 English, Symmetrical |
| 35. O Zierke vs T Wippermann |
| ½-½ | 78 | 2009 | German Championship | A46 Queen's Pawn Game |
| 36. W Heinig vs O Zierke |
| ½-½ | 36 | 2009 | German Championship | D34 Queen's Gambit Declined, Tarrasch |
| 37. O Zierke vs A Oberhofer |
| 1-0 | 22 | 2009 | German Championship | D61 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
| 38. H Tabatt vs O Zierke |
| 1-0 | 41 | 2009 | German Championship | D01 Richter-Veresov Attack |
| 39. E Zude vs O Zierke |
| ½-½ | 26 | 2009 | German Championship | D34 Queen's Gambit Declined, Tarrasch |
| 40. A Jankovic vs O Zierke |
| 0-1 | 10 | 2009 | Pula Open | D32 Queen's Gambit Declined, Tarrasch |
| 41. F Ljubicic vs O Zierke |
| 1-0 | 51 | 2009 | Pula Open | B88 Sicilian, Fischer-Sozin Attack |
| 42. O Zierke vs J Rukavina |
| ½-½ | 36 | 2009 | Pula Open | A42 Modern Defense, Averbakh System |
| 43. O Zierke vs M A Simic |
| 1-0 | 24 | 2009 | Pula Open | D15 Queen's Gambit Declined Slav |
| 44. I Nester vs O Zierke |
| 0-1 | 35 | 2009 | Pula Open | D34 Queen's Gambit Declined, Tarrasch |
| 45. O Zierke vs M Tratar |
| 0-1 | 41 | 2009 | Pula Open | A41 Queen's Pawn Game (with ...d6) |
| 46. D Miletic vs O Zierke |
| ½-½ | 17 | 2009 | Pula Open | B88 Sicilian, Fischer-Sozin Attack |
| 47. O Zierke vs I Sipos |
| 0-1 | 36 | 2012 | Pula Open | A46 Queen's Pawn Game |
| 48. O Zierke vs M Borkovec |
| 1-0 | 39 | 2012 | Pula Open | A61 Benoni |
| 49. O Zierke vs A Yakunin |
| 0-1 | 54 | 2012 | Pula Open | E99 King's Indian, Orthodox, Taimanov |
| 50. V Pregarac vs O Zierke |
| ½-½ | 27 | 2012 | Pula Open | D32 Queen's Gambit Declined, Tarrasch |
Kibitzing
