| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 101. Gligoric vs O Neikirch |
| 1-0 | 28 |
1960 |
Madrid zt | A53 Old Indian |
| 102. O Neikirch vs Minev |
| ½-½ | 35 |
1960 |
Varna | D67 Queen's Gambit Declined, Orthodox Defense, Bd3 line |
| 103. O Neikirch vs A Matanovic |
| 1-0 | 23 |
1960 |
Leipzig ol (Men) | E70 King's Indian |
| 104. Pachman vs O Neikirch |
| ½-½ | 36 |
1960 |
Madrid zt | C89 Ruy Lopez, Marshall |
| 105. O Neikirch vs Bobotsov |
| ½-½ | 17 |
1960 |
BUL-ch14 | A61 Benoni |
| 106. Unzicker vs O Neikirch |
| 1-0 | 41 |
1960 |
Olympiads | C75 Ruy Lopez, Modern Steinitz Defense |
| 107. O Neikirch vs G Borisenko |
| 0-1 | 33 |
1961 |
BUL-RUS m | E40 Nimzo-Indian, 4.e3 |
| 108. G Borisenko vs O Neikirch |
| 1-0 | 41 |
1961 |
BUL-RUS m | A53 Old Indian |
| 109. A Filipowicz vs O Neikirch |
| 0-1 | 34 |
1965 |
Polanica Zdroj | C32 King's Gambit Declined, Falkbeer Counter Gambit |
| 110. O Neikirch vs Matulovic |
| 0-1 | 25 |
1965 |
Rubinstein mem | A37 English, Symmetrical |
| 111. Vasiukov vs O Neikirch |
| 0-1 | 36 |
1965 |
Rubinstein mem | C67 Ruy Lopez |
| 112. Ujtelky vs O Neikirch |
| 1-0 | 41 |
1965 |
Rubinstein mem | A36 English |
| 113. Sliwa vs O Neikirch |
| ½-½ | 20 |
1966 |
Rubinstein mem 04th | A20 English |
| 114. Ujtelky vs O Neikirch |
| 0-1 | 57 |
1966 |
Rubinstein mem 04th | A36 English |
| 115. Smyslov vs O Neikirch |
| ½-½ | 17 |
1966 |
15, Polanica Zdroj | E17 Queen's Indian |
| 116. O Neikirch vs G Kluger |
| ½-½ | 41 |
1966 |
Rubinstein mem 04th | E63 King's Indian, Fianchetto, Panno Variation |
| 117. O Neikirch vs Halir |
 | 0-1 | 13 |
1968 |
cr | C57 Two Knights |
| 118. O Neikirch vs A Hollis |
| ½-½ | 23 |
1977 |
olm8 fin B2 corr | D93 Grunfeld, with Bf4 & e3 |