| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. O Neikirch vs A Gromer |
| ½-½ | 37 | 1939 | Buenos Aires Olympiad qual-2 | A25 English |
| 2. F Apsenieks vs O Neikirch |
 | 1-0 | 32 | 1939 | Buenos Aires Olympiad qual-2 | C55 Two Knights Defense |
| 3. O Neikirch vs P Baender |
| 0-1 | 43 | 1939 | Buenos Aires Olympiad qual-2 | A35 English, Symmetrical |
| 4. O Neikirch vs L Engels |
| ½-½ | 30 | 1939 | Buenos Aires Olympiad qual-2 | B29 Sicilian, Nimzovich-Rubinstein |
| 5. L A Gulla vs O Neikirch |
| 0-1 | 25 | 1939 | Buenos Aires Olympiad qual-2 | B72 Sicilian, Dragon |
| 6. S Morales vs O Neikirch |
| 0-1 | 59 | 1939 | Buenos Aires Olympiad Final-B | E33 Nimzo-Indian, Classical |
| 7. O Neikirch vs A Larsen |
| 1-0 | 33 | 1939 | Buenos Aires Olympiad Final-B | A13 English |
| 8. G Kerlin vs O Neikirch |
| ½-½ | 47 | 1939 | Buenos Aires Olympiad Final-B | A47 Queen's Indian |
| 9. O Neikirch vs F Pinzon |
| 1-0 | 33 | 1939 | Buenos Aires Olympiad Final-B | C86 Ruy Lopez, Worrall Attack |
| 10. J Gudmundsson vs O Neikirch |
| 1-0 | 40 | 1939 | Buenos Aires Olympiad Final-B | A46 Queen's Pawn Game |
| 11. O Neikirch vs C Hounie Fleurquin |
| 0-1 | 61 | 1939 | Buenos Aires Olympiad Final-B | C86 Ruy Lopez, Worrall Attack |
| 12. Yanofsky vs O Neikirch |
| 1-0 | 37 | 1939 | Buenos Aires Olympiad Final-B | B74 Sicilian, Dragon, Classical |
| 13. O Neikirch vs E Espinola |
| 1-0 | 51 | 1939 | Buenos Aires Olympiad Final-B | C05 French, Tarrasch |
| 14. J L Asturias vs O Neikirch |
| 0-1 | 74 | 1939 | Buenos Aires Olympiad Final-B | D04 Queen's Pawn Game |
| 15. O Neikirch vs P Baender |
| ½-½ | 30 | 1939 | Buenos Aires Olympiad Final-B | B95 Sicilian, Najdorf, 6...e6 |
| 16. O Neikirch vs A Tsvetkov |
| ½-½ | 25 | 1945 | Yugoslav Championship | D57 Queen's Gambit Declined, Lasker Defense |
| 17. B Tot vs O Neikirch |
| 1-0 | 56 | 1945 | Yugoslav Championship | A03 Bird's Opening |
| 18. O Neikirch vs Z Popovic |
| 1-0 | 38 | 1945 | Yugoslav Championship | C05 French, Tarrasch |
| 19. B Kazic vs O Neikirch |
| 0-1 | 37 | 1945 | Yugoslav Championship | D02 Queen's Pawn Game |
| 20. O Neikirch vs P Trifunovic |
| ½-½ | 24 | 1945 | Yugoslav Championship | C86 Ruy Lopez, Worrall Attack |
| 21. M Radojcic vs O Neikirch |
| 0-1 | 34 | 1945 | Yugoslav Championship | C47 Four Knights |
| 22. O Neikirch vs D Avirovic |
| 0-1 | 57 | 1945 | Yugoslav Championship | C86 Ruy Lopez, Worrall Attack |
| 23. J Feuer vs O Neikirch |
| ½-½ | 34 | 1945 | Yugoslav Championship | D04 Queen's Pawn Game |
| 24. O Neikirch vs S Vukovic |
| ½-½ | 41 | 1945 | Yugoslav Championship | C86 Ruy Lopez, Worrall Attack |
| 25. M Filipcic vs O Neikirch |
| 0-1 | 41 | 1945 | Yugoslav Championship | D48 Queen's Gambit Declined Semi-Slav, Meran |
Kibitzing
