| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. A Bergkvist vs I Niemela |
| 1-0 | 26 | 1951 | Match/Nation SWE-FIN | D37 Queen's Gambit Declined |
| 27. I Niemela vs A Bergkvist |
| 0-1 | 32 | 1951 | Match/Nation SWE-FIN | D52 Queen's Gambit Declined |
| 28. I Niemela vs Geller |
| 0-1 | 31 | 1952 | Helsinki Olympiad qual-3 | E94 King's Indian, Orthodox |
| 29. C Kottnauer vs I Niemela |
| 1-0 | 39 | 1952 | Helsinki Olympiad Final-A | D51 Queen's Gambit Declined |
| 30. I Niemela vs F Olafsson |
| 0-1 | 40 | 1955 | Nordic Championship | A56 Benoni Defense |
| 31. Larsen vs I Niemela |
| 0-1 | 48 | 1955 | Nordic Championship | A05 Reti Opening |
| 32. I Niemela vs C Jauregui |
| 0-1 | 23 | 1956 | Moscow Olympiad qual-3 | E80 King's Indian, Samisch Variation |
| 33. I Niemela vs S Gislason |
| ½-½ | 36 | 1956 | Moscow Olympiad qual-3 | E59 Nimzo-Indian, 4.e3, Main line |
| 34. B Wexler vs I Niemela |
| 0-1 | 41 | 1956 | Moscow Olympiad qual-3 | D60 Queen's Gambit Declined, Orthodox Defense |
| 35. I Niemela vs S Venkatraman |
| 1-0 | 32 | 1956 | Moscow Olympiad qual-3 | E58 Nimzo-Indian, 4.e3, Main line with 8...Bxc3 |
| 36. P Kremer vs I Niemela |
| 0-1 | 31 | 1956 | Moscow Olympiad qual-3 | D02 Queen's Pawn Game |
| 37. H van Steenis vs I Niemela |
| 1-0 | 36 | 1956 | Moscow Olympiad Final-B | C28 Vienna Game |
| 38. I Niemela vs L Ljungquist |
| 0-1 | 40 | 1956 | Moscow Olympiad Final-B | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 39. S Johannessen vs I Niemela |
| ½-½ | 44 | 1956 | Moscow Olympiad Final-B | C97 Ruy Lopez, Closed, Chigorin |
| 40. I Niemela vs A Prameshuber |
| 0-1 | 42 | 1956 | Moscow Olympiad Final-B | D55 Queen's Gambit Declined |
| 41. I Niemela vs H Platz |
| 1-0 | 37 | 1956 | Moscow Olympiad Final-B | A43 Old Benoni |
| 42. A Gudmundsson vs I Niemela |
| 1-0 | 72 | 1956 | Moscow Olympiad Final-B | D62 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
| 43. I Niemela vs Sliwa |
| ½-½ | 28 | 1957 | Sofia Zonal | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 44. I Niemela vs A Beni |
| ½-½ | 26 | 1957 | Sofia Zonal | E80 King's Indian, Samisch Variation |
| 45. G Szilagyi vs I Niemela |
| 1-0 | 32 | 1957 | Sofia Zonal | D61 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
| 46. I Niemela vs G Pfeiffer |
| 0-1 | 29 | 1957 | Sofia Zonal | D50 Queen's Gambit Declined |
| 47. O Neikirch vs I Niemela |
| 1-0 | 38 | 1957 | Sofia Zonal | D35 Queen's Gambit Declined |
| 48. F Zita vs I Niemela |
 | 1-0 | 44 | 1957 | Sofia Zonal | A06 Reti Opening |
| 49. I Niemela vs Filip |
| 0-1 | 41 | 1957 | Sofia Zonal | D82 Grunfeld, 4.Bf4 |
| 50. S Basjuni vs I Niemela |
| 0-1 | 30 | 1957 | Sofia Zonal | A13 English |
Kibitzing
