| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. G Van Doesburgh vs L Alster |
| ½-½ | 30 |
1947 |
Team match NED-CZE | B58 Sicilian |
| 2. M Bobotsov vs L Alster |
| 1-0 | 34 |
1950 |
CSR-BUL | B73 Sicilian, Dragon, Classical |
| 3. J Vesely vs L Alster |
| ½-½ | 23 |
1953 |
CSR-ch Prague | B80 Sicilian, Scheveningen |
| 4. J Kozma vs L Alster |
 | 1-0 | 27 |
1953 |
CSR-ch Prague | B76 Sicilian, Dragon, Yugoslav Attack |
| 5. J Sefc vs L Alster |
| 0-1 | 40 |
1954 |
CSR-ch | B84 Sicilian, Scheveningen |
| 6. F Blatny vs L Alster |
| ½-½ | 25 |
1954 |
CSR-ch | B26 Sicilian, Closed, 6.Be3 |
| 7. J Sefc vs L Alster |
| 0-1 | 42 |
1955 |
CSR-54ch playoff 3rd place | B76 Sicilian, Dragon, Yugoslav Attack |
| 8. J Kozma vs L Alster |
| 0-1 | 56 |
1955 |
CSR-ch | B40 Sicilian |
| 9. J Sefc vs L Alster |
| 0-1 | 40 |
1956 |
CSR-ch | B24 Sicilian, Closed |
| 10. F Blatny vs L Alster |
| ½-½ | 40 |
1956 |
CSR-ch | B76 Sicilian, Dragon, Yugoslav Attack |
| 11. Schmid vs L Alster |
 | 1-0 | 24 |
1957 |
EU-chT (Men) | B21 Sicilian, 2.f4 and 2.d4 |
| 12. Ivkov vs L Alster |
| ½-½ | 58 |
1957 |
Wageningen zt | B56 Sicilian |
| 13. J Augustin vs L Alster |
| 0-1 | 47 |
1959 |
Bratislava | B86 Sicilian, Fischer-Sozin Attack |
| 14. F Blatny vs L Alster |
| ½-½ | 57 |
1960 |
CSR-ch | B25 Sicilian, Closed |
| 15. J Marsalek vs L Alster |
| 0-1 | 40 |
1962 |
CSR-ch | B32 Sicilian |
| 16. Plachetka vs L Alster |
| 0-1 | 34 |
1962 |
CSR-ch | B27 Sicilian |
| 17. J Fabian vs L Alster |
| 0-1 | 24 |
1962 |
CSR-ch | B32 Sicilian |
| 18. F Blatny vs L Alster |
| ½-½ | 23 |
1963 |
CSR-ch | B24 Sicilian, Closed |
| 19. J Trapl vs L Alster |
| 0-1 | 29 |
1963 |
Prague ch-CSR | B56 Sicilian |
| 20. F Blatny vs L Alster |
| 0-1 | 43 |
1965 |
CSR-ch | B23 Sicilian, Closed |