| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 51. J Sikora-Lerch vs J Lechtynsky |
 | 0-1 | 12 | 1972 | Czechoslovak Championship | A82 Dutch, Staunton Gambit |
| 52. J Malis vs J Sikora-Lerch |
| ½-½ | 35 | 1972 | Czechoslovak Championship | C74 Ruy Lopez, Modern Steinitz Defense |
| 53. J Sikora-Lerch vs Smejkal |
| ½-½ | 78 | 1972 | Czechoslovak Championship | B21 Sicilian, 2.f4 and 2.d4 |
| 54. E Prandstetter vs J Sikora-Lerch |
| 1-0 | 26 | 1974 | Czechoslovak Championship | B46 Sicilian, Taimanov Variation |
| 55. J Sikora-Lerch vs J Fichtl |
| ½-½ | 15 | 1974 | Czechoslovak Championship | E07 Catalan, Closed |
| 56. J Sikora-Lerch vs Hort |
| 0-1 | 32 | 1974 | Czechoslovak Championship | B49 Sicilian, Taimanov Variation |
| 57. J Sikora-Lerch vs B Modr |
| ½-½ | 29 | 1974 | Czechoslovak Championship | B02 Alekhine's Defense |
| 58. E Meduna vs J Sikora-Lerch |
| ½-½ | 41 | 1974 | Czechoslovak Championship | A05 Reti Opening |
| 59. S Kupka vs J Sikora-Lerch |
| ½-½ | 12 | 1974 | Czechoslovak Championship | A36 English |
| 60. J Pribyl vs J Sikora-Lerch |
| 1-0 | 23 | 1974 | Czechoslovak Championship | A67 Benoni, Taimanov Variation |
| 61. J Sikora-Lerch vs Jansa |
| 0-1 | 37 | 1974 | Czechoslovak Championship | A49 King's Indian, Fianchetto without c4 |
| 62. J Sikora-Lerch vs L Neckar |
| 0-1 | 38 | 1974 | Czechoslovak Championship | B89 Sicilian |
| 63. Plachetka vs J Sikora-Lerch |
| 1-0 | 41 | 1974 | Czechoslovak Championship | A72 Benoni, Classical without 9.O-O |
| 64. J Sikora-Lerch vs A Kubicek |
| ½-½ | 45 | 1974 | Czechoslovak Championship | B49 Sicilian, Taimanov Variation |
| 65. L Mista vs J Sikora-Lerch |
| ½-½ | 12 | 1974 | Czechoslovak Championship | C74 Ruy Lopez, Modern Steinitz Defense |
| 66. J Augustin vs J Sikora-Lerch |
| ½-½ | 53 | 1974 | Czechoslovak Championship | A07 King's Indian Attack |
| 67. J Sikora-Lerch vs J Lechtynsky |
| ½-½ | 62 | 1974 | Czechoslovak Championship | B92 Sicilian, Najdorf, Opocensky Variation |
| 68. A Lanc vs J Sikora-Lerch |
| 1-0 | 41 | 1974 | Czechoslovak Championship | B42 Sicilian, Kan |
| 69. P Petran vs J Sikora-Lerch |
| 0-1 | 47 | 1976 | Czechoslovak Championship | A07 King's Indian Attack |
| 70. J Sikora-Lerch vs A Kubicek |
| ½-½ | 55 | 1976 | Czechoslovak Championship | B09 Pirc, Austrian Attack |
| 71. J Augustin vs J Sikora-Lerch |
| 1-0 | 36 | 1976 | Czechoslovak Championship | A10 English |
| 72. J Sikora-Lerch vs J Lechtynsky |
| ½-½ | 21 | 1976 | Czechoslovak Championship | C02 French, Advance |
| 73. J Sikora-Lerch vs I Jankovec |
| 1-0 | 33 | 1976 | Czechoslovak Championship | B90 Sicilian, Najdorf |
| 74. J Sikora-Lerch vs P Spacek |
| ½-½ | 46 | 1976 | Czechoslovak Championship | B39 Sicilian, Accelerated Fianchetto, Breyer Variation |
| 75. L Neckar vs J Sikora-Lerch |
| ½-½ | 42 | 1976 | Czechoslovak Championship | E62 King's Indian, Fianchetto |
Kibitzing
