| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Jansa vs Plachetka |
| 1-0 | 42 |
1962 |
CSR-ch | C98 Ruy Lopez, Closed, Chigorin |
| 2. Kavalek vs Plachetka |
| 1-0 | 34 |
1964 |
Harrachov 6465 | C93 Ruy Lopez, Closed, Smyslov Defense |
| 3. J Fichtl vs Plachetka |
| ½-½ | 41 |
1972 |
Stary Smokovec | C71 Ruy Lopez |
| 4. Gipslis vs Plachetka |
| 1-0 | 46 |
1972 |
Lublin (Poland) | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 5. J Kostro vs Plachetka |
| ½-½ | 19 |
1972 |
Stary Smokovec | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 6. J Lechtynsky vs Plachetka |
| ½-½ | 24 |
1972 |
CSR-ch | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 7. J Banas vs Plachetka |
| ½-½ | 58 |
1973 |
Stary Smokovec | C92 Ruy Lopez, Closed |
| 8. Pribyl vs Plachetka |
| ½-½ | 19 |
1973 |
Stary Smokovec | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 9. S Bohosjan vs Plachetka |
| ½-½ | 34 |
1973 |
Stary Smokovec | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 10. J Fichtl vs Plachetka |
| 0-1 | 80 |
1973 |
Stary Smokovec | C77 Ruy Lopez |
| 11. L Zinn vs Plachetka |
| 0-1 | 29 |
1973 |
CSR-DDR | C68 Ruy Lopez, Exchange |
| 12. Sznapik vs Plachetka |
| 1-0 | 53 |
1973 |
Lublin | C89 Ruy Lopez, Marshall |
| 13. R Martelli vs Plachetka |
| 0-1 | 30 |
1974 |
Nice ol (Men) qual-F | C71 Ruy Lopez |
| 14. O Kinnmark vs Plachetka |
| 0-1 | 43 |
1974 |
Nice ol (Men) fin-A | C91 Ruy Lopez, Closed |
| 15. Velimirovic vs Plachetka |
| 1-0 | 38 |
1974 |
Nice ol (Men) fin-A | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 16. L Mista vs Plachetka |
 | 1-0 | 37 |
1974 |
CSR-ch | C89 Ruy Lopez, Marshall |
| 17. S Garcia-Martinez vs Plachetka |
| ½-½ | 30 |
1975 |
Rubinstein mem | C89 Ruy Lopez, Marshall |
| 18. J Bielczyk vs Plachetka |
| 0-1 | 43 |
1975 |
Rubinstein mem | C73 Ruy Lopez, Modern Steinitz Defense |
| 19. I Hausner vs Plachetka |
| 0-1 | 42 |
1975 |
Rimavska Sobota-A 4th | C84 Ruy Lopez, Closed |
| 20. Schneider vs Plachetka |
| 0-1 | 39 |
1975 |
EU-chT sf | C68 Ruy Lopez, Exchange |
| 21. P Dely vs Plachetka |
| 1-0 | 66 |
1975 |
Toth mem 5th | C88 Ruy Lopez |
| 22. K Rogoff vs Plachetka |
| ½-½ | 28 |
1975 |
Rubinstein mem | C88 Ruy Lopez |
| 23. Dusan Pecner vs Plachetka |
| 0-1 | 66 |
1975 |
SVK-ch | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 24. F Ignatiev vs Plachetka |
| ½-½ | 18 |
1976 |
Odessa | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 25. Bronstein vs Plachetka |
| ½-½ | 26 |
1976 |
Odessa | C91 Ruy Lopez, Closed |