| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. A Lein vs Nezhmetdinov |
| 1-0 | 49 |
1961 |
Azerbaijan | C41 Philidor Defense |
| 27. A Lein vs A Zaitsev |
| 1-0 | 49 |
1961 |
Moscow (Russia) | A43 Old Benoni |
| 28. A Lein vs Jansa |
| 0-1 | 30 |
1961 |
Moscow | B46 Sicilian, Taimanov Variation |
| 29. A Lein vs Shamkovich |
| ½-½ | 59 |
1961 |
Ch URS | A49 King's Indian, Fianchetto without c4 |
| 30. A Lein vs Bagirov |
| ½-½ | 42 |
1961 |
15, Baku | C17 French, Winawer, Advance |
| 31. A Lein vs Savon |
| 0-1 | 24 |
1961 |
URS-ch29 | B09 Pirc, Austrian Attack |
| 32. A Khasin vs A Lein |
| ½-½ | 24 |
1961 |
29th USSR Championship | D56 Queen's Gambit Declined |
| 33. B Vladimirov vs A Lein |
| 1-0 | 33 |
1961 |
URS-ch29 | E25 Nimzo-Indian, Samisch |
| 34. A Lein vs Taimanov |
| ½-½ | 34 |
1961 |
Baku | B31 Sicilian, Rossolimo Variation |
| 35. Gurgenidze vs A Lein |
| ½-½ | 57 |
1961 |
29th USSR Championship | C63 Ruy Lopez, Schliemann Defense |
| 36. Keres vs A Lein |
| ½-½ | 41 |
1961 |
Baku SU-ch (17.11.61) | C10 French |
| 37. Tal vs A Lein |
| ½-½ | 81 |
1961 |
Baku | B14 Caro-Kann, Panov-Botvinnik Attack |
| 38. A Lein vs Bronstein |
| ½-½ | 17 |
1961 |
Ch URS | B28 Sicilian, O'Kelly Variation |
| 39. Antoshin vs A Lein |
| 1-0 | 79 |
1962 |
Kislovodsk | B06 Robatsch |
| 40. Lutikov vs A Lein |
| ½-½ | 41 |
1963 |
URS-ch sf | C16 French, Winawer |
| 41. A Lein vs Nezhmetdinov |
| 0-1 | 28 |
1964 |
M.Chigorin | D11 Queen's Gambit Declined Slav |
| 42. V Liavdansky vs A Lein |
| 0-1 | 42 |
1964 |
URS-ch32 | E46 Nimzo-Indian |
| 43. G Borisenko vs A Lein |
| ½-½ | 48 |
1964 |
URS-ch32 | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 44. A Lein vs Ujtumen |
| 1-0 | 41 |
1964 |
Sochi Chigorin mem | A07 King's Indian Attack |
| 45. Matulovic vs A Lein |
| 1-0 | 39 |
1964 |
Chigorin mem | C81 Ruy Lopez, Open, Howell Attack |
| 46. Krogius vs A Lein |
| ½-½ | 19 |
1964 |
URS-ch32 | D58 Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst |
| 47. Vasiukov vs A Lein |
| 0-1 | 38 |
1964 |
URS-ch32 | B49 Sicilian, Taimanov Variation |
| 48. A Lein vs N Bakulin |
| 1-0 | 66 |
1964 |
URS-ch32 | C75 Ruy Lopez, Modern Steinitz Defense |
| 49. A Lein vs Bannik |
| 1-0 | 36 |
1964 |
URS-ch32 | E10 Queen's Pawn Game |
| 50. A Lein vs Lutikov |
| ½-½ | 20 |
1964 |
URS-ch32 | C83 Ruy Lopez, Open |