| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. J Sanz Aguado vs I Koenig |
| 0-1 | 45 | 1931 | Prague Olympiad | C84 Ruy Lopez, Closed |
| 52. I Koenig vs V Filipovic |
| 1-0 | 44 | 1935 | Yugoslav Championship | A15 English |
| 53. Pirc vs I Koenig |
| 1-0 | 68 | 1935 | Yugoslav Championship | E12 Queen's Indian |
| 54. I Koenig vs B Tot |
| 1-0 | 21 | 1935 | Yugoslav Championship | A04 Reti Opening |
| 55. Kostic vs I Koenig |
| ½-½ | 41 | 1935 | Yugoslav Championship | D45 Queen's Gambit Declined Semi-Slav |
| 56. I Koenig vs V Petrovic |
| 1-0 | 13 | 1935 | Yugoslav Championship | D30 Queen's Gambit Declined |
| 57. I Koenig vs M Broeder |
| ½-½ | 40 | 1935 | Yugoslav Championship | C07 French, Tarrasch |
| 58. L Asztalos vs I Koenig |
| 1-0 | 41 | 1935 | Yugoslav Championship | C11 French |
| 59. I Koenig vs S Vukovic |
| 1-0 | 40 | 1935 | Yugoslav Championship | D61 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
| 60. V Tomovic vs I Koenig |
| 1-0 | 35 | 1935 | Yugoslav Championship | B60 Sicilian, Richter-Rauzer |
| 61. I Koenig vs E Sorensen |
| 1-0 | 23 | 1935 | Warsaw Olympiad | C86 Ruy Lopez, Worrall Attack |
| 62. I Koenig vs T Salo |
 | 1-0 | 36 | 1935 | Warsaw Olympiad | B58 Sicilian |
| 63. I Koenig vs I Raud |
| 1-0 | 49 | 1935 | Warsaw Olympiad | C74 Ruy Lopez, Modern Steinitz Defense |
| 64. Golombek vs I Koenig |
| ½-½ | 30 | 1935 | Warsaw Olympiad | A18 English, Mikenas-Carls |
| 65. I Koenig vs J Pelikan |
| ½-½ | 30 | 1935 | Warsaw Olympiad | D67 Queen's Gambit Declined, Orthodox Defense, Bd3 line |
| 66. I Koenig vs P Rethy |
| 0-1 | 75 | 1935 | Warsaw Olympiad | A04 Reti Opening |
| 67. G Danielsson vs I Koenig |
| ½-½ | 62 | 1935 | Warsaw Olympiad | E24 Nimzo-Indian, Samisch |
| 68. I Koenig vs M Napolitano |
| ½-½ | 59 | 1935 | Warsaw Olympiad | B10 Caro-Kann |
| 69. E Krumins vs I Koenig |
| 1-0 | 46 | 1935 | Warsaw Olympiad | A47 Queen's Indian |
| 70. I Koenig vs P Trifunovic |
| ½-½ | 37 | 1936 | Yugoslav Championship | A13 English |
| 71. I Koenig vs Z Popovic |
| ½-½ | 30 | 1936 | Yugoslav Championship | B10 Caro-Kann |
| 72. V Tomovic vs I Koenig |
| 0-1 | 40 | 1936 | Yugoslav Championship | B71 Sicilian, Dragon, Levenfish Variation |
| 73. I Koenig vs J Pelikan |
| 0-1 | 24 | 1936 | Yugoslav Championship | D06 Queen's Gambit Declined |
| 74. P Frydman vs I Koenig |
| 0-1 | 25 | 1936 | Yugoslav Championship | D19 Queen's Gambit Declined Slav, Dutch |
| 75. I Koenig vs W Hasenfuss |
| 1-0 | 24 | 1936 | non-FIDE Munich Olympiad | C40 King's Knight Opening |
Kibitzing
