| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Plachetka vs J Augustin |
| 1-0 | 21 |
1964 |
Harrachov 6465 | A14 English |
| 2. Plachetka vs J Augustin |
| 1-0 | 42 |
1966 |
Harrachov U26 | A18 English, Mikenas-Carls |
| 3. Plachetka vs S Kupka |
| 1-0 | 48 |
1968 |
CSR-ch | A12 English with b3 |
| 4. Plachetka vs A Beni |
| 1-0 | 39 |
1969 |
Luhacovice | A12 English with b3 |
| 5. Plachetka vs Keres |
| 0-1 | 35 |
1969 |
Ch Czechoslovakia | A15 English |
| 6. Plachetka vs Huebner |
| 0-1 | 32 |
1969 |
WchT U26 fin-A 16th | A10 English |
| 7. Plachetka vs A Lombard |
| 1-0 | 35 |
1969 |
Stary Smokovec | A19 English, Mikenas-Carls, Sicilian Variation |
| 8. Plachetka vs Tal |
 | ½-½ | 47 |
1970 |
Kapfenberg tt | A15 English |
| 9. Plachetka vs Tal |
| ½-½ | 47 |
1970 |
Kapfenberg ETC | A15 English |
| 10. Plachetka vs Smejkal |
| 0-1 | 41 |
1970 |
CSR-ch Havirov | A16 English |
| 11. Plachetka vs S Kupka |
| ½-½ | 58 |
1971 |
CSR-ch int | A10 English |
| 12. Plachetka vs Smejkal |
| 0-1 | 50 |
1971 |
CSR-ch int | A16 English |
| 13. Plachetka vs Igor Privara |
| 1-0 | 42 |
1971 |
Novy Smokovec | A15 English |
| 14. Plachetka vs Pribyl |
| 0-1 | 40 |
1972 |
CSR-ch | A16 English |
| 15. Plachetka vs A Kubicek |
| 1-0 | 49 |
1972 |
CSR-ch | A16 English |
| 16. Plachetka vs H Kestler |
| 0-1 | 32 |
1974 |
Nice ol (Men) fin-A | A15 English |
| 17. Plachetka vs R Kvetoslav |
| 1-0 | 58 |
1974 |
Stary Smokovec | A15 English |
| 18. Plachetka vs Tseshkovsky |
| 0-1 | 36 |
1974 |
Bucharest | A15 English |
| 19. Plachetka vs Doda |
| ½-½ | 57 |
1975 |
Rubinstein mem | A10 English |
| 20. Plachetka vs J Klovans |
| ½-½ | 17 |
1975 |
Rubinstein mem | A18 English, Mikenas-Carls |
| 21. Plachetka vs K Lerner |
| 0-1 | 34 |
1976 |
Odessa | A19 English, Mikenas-Carls, Sicilian Variation |
| 22. Plachetka vs Alburt |
| 1-0 | 59 |
1976 |
Decin-A | A15 English |
| 23. Plachetka vs P Peev |
| 1-0 | 40 |
1977 |
Maribor | A10 English |
| 24. Plachetka vs J Franzen |
| 1-0 | 64 |
1978 |
Tatran Cup | A19 English, Mikenas-Carls, Sicilian Variation |
| 25. Plachetka vs J Ambroz |
| ½-½ | 58 |
1978 |
CSR-ch | A19 English, Mikenas-Carls, Sicilian Variation |