| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. A Olson vs G Nyholm |
| 1-0 | 41 | 1919 | Schultz Memorial, Stockholm | C88 Ruy Lopez |
| 27. Spielmann vs A Olson |
| 1-0 | 17 | 1919 | Schultz Memorial, Stockholm | C52 Evans Gambit |
| 28. A Olson vs E Jacobson |
| 1-0 | 38 | 1919 | Schultz Memorial, Stockholm | C87 Ruy Lopez |
| 29. Bogoljubov vs A Olson |
| 1-0 | 16 | 1919 | Schultz Memorial, Stockholm | C33 King's Gambit Accepted |
| 30. A Olson vs Collijn |
| 0-1 | 27 | 1920 | Stockholm | B01 Scandinavian |
| 31. A Olson vs A Hakansson |
| 1-0 | 41 | 1920 | Gothenburg B | A40 Queen's Pawn Game |
| 32. K Berndtsson vs A Olson |
  | 0-1 | 63 | 1920 | Gothenburg B | C77 Ruy Lopez |
| 33. A Olson vs A Larsson |
| 1-0 | 31 | 1920 | Gothenburg B | C83 Ruy Lopez, Open |
| 34. P Johner vs A Olson |
| ½-½ | 44 | 1920 | Gothenburg B | D02 Queen's Pawn Game |
| 35. A Olson vs C Carls |
| 0-1 | 48 | 1920 | Gothenburg B | B15 Caro-Kann |
| 36. Saemisch vs A Olson |
| 1-0 | 37 | 1920 | Gothenburg B | A46 Queen's Pawn Game |
| 37. A Olson vs Euwe |
| 0-1 | 29 | 1920 | Gothenburg B | C77 Ruy Lopez |
| 38. A Olson vs W John |
| 0-1 | 37 | 1920 | Gothenburg B | C83 Ruy Lopez, Open |
| 39. H von Hennig vs A Olson |
| 1-0 | 32 | 1920 | Gothenburg B | C78 Ruy Lopez |
| 40. A Olson vs M Marchand |
| 1-0 | 91 | 1920 | Gothenburg B | C01 French, Exchange |
| 41. Olland vs A Olson |
| 0-1 | 46 | 1920 | Gothenburg B | C83 Ruy Lopez, Open |
| 42. A Olson vs Gruenfeld |
| ½-½ | 60 | 1920 | Gothenburg B | C97 Ruy Lopez, Closed, Chigorin |
| 43. A Nilsson vs A Olson |
| 1-0 | 52 | 1920 | Gothenburg B | D63 Queen's Gambit Declined, Orthodox Defense |
| 44. A Olson vs V Sjoberg |
| 1-0 | 72 | 1920 | Gothenburg B | B40 Sicilian |
| 45. E Jacobson vs A Olson |
| 1-0 | 34 | 1920 | Gothenburg B | C33 King's Gambit Accepted |
| 46. V Wendel vs A Olson |
| 1-0 | 35 | 1920 | Stockholms Schacksaellskap Jubilee-02 | C68 Ruy Lopez, Exchange |
| 47. A Olson vs A Nimzowitsch |
| 0-1 | 48 | 1920 | 2nd Stockholm Jubilee | B00 Uncommon King's Pawn Opening |
| 48. A Nimzowitsch vs A Olson |
| 1-0 | 31 | 1920 | 2nd Stockholm Jubilee | C49 Four Knights |
| 49. K Berndtsson vs A Olson |
| ½-½ | 58 | 1924 | Nordic Congress, Copenhagen | A07 King's Indian Attack |
| 50. A Olson vs A Brinckmann |
| 1-0 | 23 | 1924 | Nordic Congress, Copenhagen | A41 Queen's Pawn Game (with ...d6) |
Kibitzing
