| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. J Podgorny vs L Alster |
| 0-1 | 41 | 1953 | Czechoslovak Championship | A43 Old Benoni |
| 27. Pachman vs L Alster |
 | 0-1 | 47 | 1953 | Czechoslovak Championship | E70 King's Indian |
| 28. L Alster vs V Stulik |
| 1-0 | 41 | 1953 | Czechoslovak Championship | E80 King's Indian, Samisch Variation |
| 29. L Alster vs V Brat |
| ½-½ | 20 | 1953 | Czechoslovak Championship | A04 Reti Opening |
| 30. L Alster vs J Fichtl |
| 1-0 | 48 | 1953 | Czechoslovak Championship | A06 Reti Opening |
| 31. V Hofman vs L Alster |
| 1-0 | 40 | 1953 | Czechoslovak Championship | A00 Uncommon Opening |
| 32. L Alster vs K Opocensky |
| ½-½ | 35 | 1953 | Czechoslovak Championship | A07 King's Indian Attack |
| 33. L Alster vs J Sefc |
| 1-0 | 56 | 1953 | Czechoslovak Championship | A07 King's Indian Attack |
| 34. J Vesely vs L Alster |
| ½-½ | 23 | 1953 | Czechoslovak Championship | B80 Sicilian, Scheveningen |
| 35. L Alster vs J Sajtar |
| 1-0 | 31 | 1953 | Czechoslovak Championship | B52 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 36. M Ujtelky vs L Alster |
| ½-½ | 26 | 1953 | Czechoslovak Championship | A43 Old Benoni |
| 37. J Kozma vs L Alster |
| 1-0 | 27 | 1953 | Czechoslovak Championship | B76 Sicilian, Dragon, Yugoslav Attack |
| 38. L Alster vs Filip |
| 0-1 | 46 | 1953 | Czechoslovak Championship | D86 Grunfeld, Exchange |
| 39. L Alster vs L Navarovszky |
| ½-½ | 24 | 1954 | Budapest tt | A48 King's Indian |
| 40. L Alster vs L Tipary |
| ½-½ | 23 | 1954 | Budapest tt | A07 King's Indian Attack |
| 41. I Branicki vs L Alster |
| 1-0 | 41 | 1954 | Budapest tt | E85 King's Indian, Samisch, Orthodox Variation |
| 42. T Olafsson vs L Alster |
| 1-0 | 37 | 1954 | World Student Team Championship | A43 Old Benoni |
| 43. L Alster vs P Ofstad |
| 1-0 | 30 | 1954 | World Student Team Championship | D36 Queen's Gambit Declined, Exchange, Positional line, 6.Qc2 |
| 44. L Alster vs J Sajtar |
| ½-½ | 52 | 1954 | Czechoslovak Championship | A02 Bird's Opening |
| 45. J Sefc vs L Alster |
| 0-1 | 40 | 1954 | Czechoslovak Championship | B43 Sicilian, Kan, 5.Nc3 |
| 46. L Alster vs F Zita |
| 1-0 | 31 | 1954 | Czechoslovak Championship | D19 Queen's Gambit Declined Slav, Dutch |
| 47. K Urbanec vs L Alster |
| 1-0 | 35 | 1954 | Czechoslovak Championship | B43 Sicilian, Kan, 5.Nc3 |
| 48. L Alster vs J Podgorny |
| ½-½ | 36 | 1954 | Czechoslovak Championship | D50 Queen's Gambit Declined |
| 49. V Brat vs L Alster |
| ½-½ | 29 | 1954 | Czechoslovak Championship | C64 Ruy Lopez, Classical |
| 50. L Alster vs K Prucha |
| 1-0 | 48 | 1954 | Czechoslovak Championship | E46 Nimzo-Indian |
Kibitzing
