| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. R Krogius vs A Niemela |
 | 1-0 | 18 |
1934 |
Loviisa | D30 Queen's Gambit Declined |
| 2. A Niemela vs Book |
| 1-0 | 22 |
1934 |
Helsinki | C55 Two Knights Defense |
| 3. E Rojahn vs A Niemela |
| 0-1 | 29 |
1948 |
Saltsjobaden tt | E18 Queen's Indian, Old Main line, 7.Nc3 |
| 4. A Niemela vs Rellstab |
| ½-½ | 34 |
1950 |
Dubrovnik olm | D52 Queen's Gambit Declined |
| 5. A Niemela vs M Zapata Vinces |
| 1-0 | 26 |
1950 |
Dubrovnik olm | D50 Queen's Gambit Declined |
| 6. A Niemela vs M Kupferstich |
| 0-1 | 41 |
1950 |
Dubrovnik olm | A54 Old Indian, Ukrainian Variation, 4.Nf3 |
| 7. T Panagopoulos vs A Niemela |
| ½-½ | 56 |
1950 |
Dubrovnik olm | D63 Queen's Gambit Declined, Orthodox Defense |
| 8. Guimard vs A Niemela |
| ½-½ | 37 |
1950 |
Dubrovnik olm | D05 Queen's Pawn Game |
| 9. A Bergqvist vs A Niemela |
| 1-0 | 48 |
1950 |
Dubrovnik olm | D37 Queen's Gambit Declined |
| 10. A Niemela vs P Trifunovic |
| 0-1 | 39 |
1950 |
Dubrovnik olm | A54 Old Indian, Ukrainian Variation, 4.Nf3 |
| 11. A Niemela vs A M Giustolisi |
| 1-0 | 44 |
1950 |
Dubrovnik olm | E80 King's Indian, Samisch Variation |
| 12. Morcken vs A Niemela |
| ½-½ | 102 |
1950 |
Dubrovnik olm | D60 Queen's Gambit Declined, Orthodox Defense |
| 13. A Niemela vs J H Donner |
| 1-0 | 30 |
1950 |
Dubrovnik olm | E47 Nimzo-Indian, 4.e3 O-O 5.Bd3 |
| 14. A Niemela vs Geller |
| 0-1 | 31 |
1952 |
Helsinki | E94 King's Indian, Orthodox |
| 15. A Niemela vs A Prameshuber |
| 0-1 | 42 |
1956 |
Moscow ol (Men) fin-B | D55 Queen's Gambit Declined |
| 16. A Niemela vs T Venkatraman |
| 1-0 | 32 |
1956 |
Moscow (ol) | E58 Nimzo-Indian, 4.e3, Main line with 8...Bxc3 |
| 17. A Niemela vs A Beni |
| ½-½ | 26 |
1957 |
Zonal tournament, Sofia | E80 King's Indian, Samisch Variation |
| 18. N Karaklajic vs A Niemela |
| 1-0 | 71 |
1957 |
Zonal tournament, Sofia | C78 Ruy Lopez |
| 19. A Niemela vs A Matanovic |
| 0-1 | 41 |
1957 |
Zonal tournament, Sofia | E41 Nimzo-Indian |
| 20. G Szilagyi vs A Niemela |
| 1-0 | 32 |
1957 |
Zonal tournament, Sofia | D61 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
| 21. A Niemela vs Sliwa |
| ½-½ | 28 |
1957 |
Zonal tournament, Sofia | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 22. R Fuchs vs A Niemela |
| ½-½ | 23 |
1957 |
Zonal tournament, Sofia | E06 Catalan, Closed, 5.Nf3 |
| 23. O Neikirch vs A Niemela |
| 1-0 | 38 |
1957 |
Zonal tournament, Sofia | D35 Queen's Gambit Declined |
| 24. A Niemela vs G Barcza |
| 1-0 | 52 |
1957 |
Zonal tournament, Sofia | E47 Nimzo-Indian, 4.e3 O-O 5.Bd3 |
| 25. F Zita vs A Niemela |
| 1-0 | 44 |
1957 |
Zonal tournament, Sofia | A06 Reti Opening |