| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. L Alster vs Prochazka |
 | 1-0 | 11 |
1944 |
Melnik, CZE | A51 Budapest Gambit |
| 2. L Alster vs R W Bonham |
 | ½-½ | 51 |
1947 |
Match MCCU-CZE | D62 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
| 3. R W Bonham vs L Alster |
 | 1-0 | 40 |
1947 |
Match MCCU-CZE | E72 King's Indian |
| 4. G Van Doesburgh vs L Alster |
| ½-½ | 30 |
1947 |
Team match NED-CZE | B58 Sicilian |
| 5. L Alster vs G Van Doesburgh |
| 0-1 | 40 |
1947 |
Team match NED-CZE | C11 French |
| 6. L Alster vs Sajtar |
| ½-½ | 16 |
1948 |
CSR-ch | D59 Queen's Gambit Declined, Tartakower |
| 7. L Alster vs C Kottnauer |
| 1-0 | 41 |
1948 |
CSR-ch | A19 English, Mikenas-Carls, Sicilian Variation |
| 8. Ujtelky vs L Alster |
 | 0-1 | 47 |
1948 |
CSR-ch | D75 Neo-Grunfeld, 6.cd Nxd5, 7.O-O c5, 8.dxc5 |
| 9. M Bobotsov vs L Alster |
| 1-0 | 34 |
1950 |
CSR-BUL | B73 Sicilian, Dragon, Classical |
| 10. Ujtelky vs L Alster |
| ½-½ | 26 |
1953 |
CSR-ch | A47 Queen's Indian |
| 11. J Kozma vs L Alster |
 | 1-0 | 27 |
1953 |
CSR-ch Prague | B76 Sicilian, Dragon, Yugoslav Attack |
| 12. L Alster vs Sajtar |
| 1-0 | 31 |
1953 |
CSR-ch Prague | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 13. J Vesely vs L Alster |
| ½-½ | 23 |
1953 |
CSR-ch Prague | B80 Sicilian, Scheveningen |
| 14. L Alster vs J Sefc |
| 1-0 | 56 |
1953 |
CSR-ch | A08 King's Indian Attack |
| 15. L Alster vs Filip |
| 0-1 | 46 |
1953 |
CSR-ch Prague | D86 Grunfeld, Exchange |
| 16. F Blatny vs L Alster |
| ½-½ | 25 |
1954 |
CSR-ch | B26 Sicilian, Closed, 6.Be3 |
| 17. L Alster vs J Kozma |
| ½-½ | 40 |
1954 |
CSR-ch | E40 Nimzo-Indian, 4.e3 |
| 18. J Sefc vs L Alster |
| 0-1 | 40 |
1954 |
CSR-ch | B84 Sicilian, Scheveningen |
| 19. L Alster vs Sajtar |
| ½-½ | 52 |
1954 |
CSR-ch | A02 Bird's Opening |
| 20. L Alster vs Filip |
| ½-½ | 15 |
1954 |
CSR-ch | E15 Queen's Indian |
| 21. L Alster vs L Tipary |
| ½-½ | 23 |
1954 |
Budapest tt | A07 King's Indian Attack |
| 22. Ujtelky vs L Alster |
| ½-½ | 17 |
1954 |
CSR-ch | E16 Queen's Indian |
| 23. J Kozma vs L Alster |
| 0-1 | 56 |
1955 |
CSR-ch | B40 Sicilian |
| 24. L Alster vs Ujtelky |
| 1-0 | 25 |
1955 |
CSR-ch | A43 Old Benoni |
| 25. J Rejfir vs L Alster |
 | 1-0 | 75 |
1955 |
CSR-ch | E80 King's Indian, Samisch Variation |