| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. B M Kogan vs Y Sakharov |
| 0-1 | 28 | 1963 | Ukrainian Championship | D08 Queen's Gambit Declined, Albin Counter Gambit |
| 27. I Platonov vs B M Kogan |
 | 1-0 | 66 | 1963 | Ukrainian Championship | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 28. B M Kogan vs A Kostiuchenko |
| ½-½ | 74 | 1963 | Ukrainian Championship | A41 Queen's Pawn Game (with ...d6) |
| 29. A Zamikhovsky vs B M Kogan |
| ½-½ | 66 | 1963 | Ukrainian Championship | A38 English, Symmetrical |
| 30. B M Kogan vs R Romanovsky |
| 0-1 | 49 | 1963 | Ukrainian Championship | D71 Neo-Grunfeld |
| 31. Y Nikolaevsky vs B M Kogan |
| ½-½ | 37 | 1963 | Ukrainian Championship | D30 Queen's Gambit Declined |
| 32. B M Kogan vs A Kostiuchenko |
| ½-½ | 68 | 1964 | Ukrainian Championship | A00 Uncommon Opening |
| 33. V Shiyanovsky vs B M Kogan |
| ½-½ | 39 | 1964 | Ukrainian Championship | B15 Caro-Kann |
| 34. B M Kogan vs V Berezhnoi |
| 0-1 | 59 | 1964 | Ukrainian Championship | D31 Queen's Gambit Declined |
| 35. N Levin vs B M Kogan |
| ½-½ | 74 | 1964 | Ukrainian Championship | B10 Caro-Kann |
| 36. B M Kogan vs E Lazarev |
| 0-1 | 39 | 1964 | Ukrainian Championship | D31 Queen's Gambit Declined |
| 37. R Pelts vs B M Kogan |
| ½-½ | 53 | 1964 | Ukrainian Championship | E82 King's Indian, Samisch, double Fianchetto Variation |
| 38. B M Kogan vs N Zilberman |
| ½-½ | 53 | 1964 | Ukrainian Championship | A56 Benoni Defense |
| 39. A Bannik vs B M Kogan |
| 1-0 | 31 | 1964 | Ukrainian Championship | B15 Caro-Kann |
| 40. B M Kogan vs J Yuchtman |
| 0-1 | 90 | 1964 | Ukrainian Championship | A56 Benoni Defense |
| 41. B Dikarev vs B M Kogan |
| 1-0 | 37 | 1964 | Ukrainian Championship | B88 Sicilian, Fischer-Sozin Attack |
| 42. B M Kogan vs V Atamanov |
| ½-½ | 48 | 1964 | Ukrainian Championship | E46 Nimzo-Indian |
| 43. B M Kogan vs V S Zhidkov |
| 1-0 | 39 | 1964 | Ukrainian Championship | A35 English, Symmetrical |
| 44. Y Sakharov vs B M Kogan |
| 1-0 | 41 | 1964 | Ukrainian Championship | E91 King's Indian |
| 45. B M Kogan vs J Rotstein |
| 1-0 | 39 | 1964 | Ukrainian Championship | A42 Modern Defense, Averbakh System |
| 46. V Pushkar vs B M Kogan |
| 0-1 | 43 | 1964 | Ukrainian Championship | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 47. B M Kogan vs S Gershman |
| ½-½ | 58 | 1964 | Ukrainian Championship | E43 Nimzo-Indian, Fischer Variation |
| 48. Gufeld vs B M Kogan |
| 1-0 | 21 | 1964 | Ukrainian Championship | D24 Queen's Gambit Accepted |
| 49. B M Kogan vs S Lewicki |
| 1-0 | 45 | 1964 | Ukrainian Championship | B32 Sicilian |
| 50. R Romanovsky vs B M Kogan |
| ½-½ | 21 | 1964 | Ukrainian Championship | B63 Sicilian, Richter-Rauzer Attack |
Kibitzing
