| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. O Bernstein vs O Morcken |
| 0-1 | 47 | 1954 | Amsterdam Olympiad Final-B | B73 Sicilian, Dragon, Classical |
| 27. E Paoli vs O Morcken |
| 1-0 | 37 | 1954 | Amsterdam Olympiad Final-B | B77 Sicilian, Dragon, Yugoslav Attack |
| 28. O Morcken vs Larsen |
 | 0-1 | 29 | 1954 | Amsterdam Olympiad Final-B | A33 English, Symmetrical |
| 29. T Kelly vs O Morcken |
| 0-1 | 38 | 1954 | Amsterdam Olympiad Final-B | D00 Queen's Pawn Game |
| 30. J Vesterinen vs O Morcken |
| ½-½ | 37 | 1954 | Amsterdam Olympiad Final-B | D63 Queen's Gambit Declined, Orthodox Defense |
| 31. O Morcken vs Robatsch |
| ½-½ | 82 | 1954 | Amsterdam Olympiad Final-B | A40 Queen's Pawn Game |
| 32. D Parliaros vs O Morcken |
| ½-½ | 27 | 1954 | Amsterdam Olympiad Final-B | A07 King's Indian Attack |
| 33. C Doerner vs O Morcken |
| ½-½ | 21 | 1954 | Amsterdam Olympiad Final-B | E04 Catalan, Open, 5.Nf3 |
| 34. O Morcken vs M Cuellar Gacharna |
| 0-1 | 52 | 1954 | Amsterdam Olympiad Final-B | E60 King's Indian Defense |
| 35. N Minev vs O Morcken |
| ½-½ | 36 | 1956 | Moscow Olympiad qual-1 | D32 Queen's Gambit Declined, Tarrasch |
| 36. O Morcken vs E Bhend |
| ½-½ | 34 | 1956 | Moscow Olympiad qual-1 | A97 Dutch, Ilyin-Genevsky |
| 37. A Stenborg vs O Morcken |
| 0-1 | 33 | 1956 | Moscow Olympiad qual-1 | D46 Queen's Gambit Declined Semi-Slav |
| 38. O Morcken vs M Colon Romero |
| 1-0 | 57 | 1956 | Moscow Olympiad qual-1 | E60 King's Indian Defense |
| 39. O Morcken vs R Dworzynski |
| 0-1 | 63 | 1956 | Moscow Olympiad qual-1 | E60 King's Indian Defense |
| 40. O Morcken vs C Boutteville |
| 0-1 | 28 | 1956 | Moscow Olympiad Final-B | D15 Queen's Gambit Declined Slav |
| 41. O Morcken vs Robatsch |
| 0-1 | 48 | 1956 | Moscow Olympiad Final-B | A07 King's Indian Attack |
| 42. O Morcken vs M Rantanen |
| ½-½ | 81 | 1956 | Moscow Olympiad Final-B | D38 Queen's Gambit Declined, Ragozin Variation |
| 43. S Dittmann vs O Morcken |
| 1-0 | 35 | 1956 | Moscow Olympiad Final-B | D43 Queen's Gambit Declined Semi-Slav |
| 44. O Morcken vs Letelier |
| 0-1 | 19 | 1956 | Moscow Olympiad Final-B | D90 Grunfeld |
| 45. H Kramer vs O Morcken |
| 0-1 | 37 | 1956 | Moscow Olympiad Final-B | D51 Queen's Gambit Declined |
| 46. O Morcken vs A Stenborg |
| ½-½ | 23 | 1956 | Moscow Olympiad Final-B | A49 King's Indian, Fianchetto without c4 |
| 47. O Morcken vs P Limbos |
| ½-½ | 24 | 1956 | Moscow Olympiad Final-B | A07 King's Indian Attack |
Kibitzing
