| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. I Platonov vs A Buslaev |
| 1-0 | 37 |
1967 |
Olympiad URS | B32 Sicilian |
| 27. Taimanov vs I Platonov |
| ½-½ | 45 |
1967 |
USSR Championship | E46 Nimzo-Indian |
| 28. A Lein vs I Platonov |
| 0-1 | 57 |
1967 |
USSR Championship | A04 Reti Opening |
| 29. G Kuzmin vs I Platonov |
| ½-½ | 41 |
1967 |
USSR Championship | B97 Sicilian, Najdorf |
| 30. I Platonov vs A Zakharov |
| 1-0 | 34 |
1967 |
M:RSFSR-Latvia | B27 Sicilian |
| 31. I Platonov vs Alburt |
| 1-0 | 41 |
1967 |
USSR Championship | A04 Reti Opening |
| 32. I Platonov vs I Radulov |
| 1-0 | 34 |
1967 |
Sofia (Bulgaria) | D55 Queen's Gambit Declined |
| 33. Y Nikolaevsky vs I Platonov |
| 0-1 | 56 |
1967 |
USSR Championship | A07 King's Indian Attack |
| 34. I Platonov vs Y Shilov |
| ½-½ | 44 |
1967 |
USSR Championship | A40 Queen's Pawn Game |
| 35. Tal vs I Platonov |
 | 0-1 | 53 |
1968 |
USSR Championship 1968/69 | B95 Sicilian, Najdorf, 6...e6 |
| 36. I Platonov vs J Klovans |
| 0-1 | 40 |
1968 |
USSR Championship 1968/69 | E14 Queen's Indian |
| 37. I Platonov vs Minic |
| ½-½ | 21 |
1968 |
Sochi (Russia) | B97 Sicilian, Najdorf |
| 38. A Lein vs I Platonov |
| 1-0 | 45 |
1968 |
USSR Championship 1968/69 | E49 Nimzo-Indian, 4.e3, Botvinnik System |
| 39. I Platonov vs Polugaevsky |
| ½-½ | 23 |
1968 |
USSR Championship 1968/69 | B59 Sicilian, Boleslavsky Variation, 7.Nb3 |
| 40. I Platonov vs A Vitolinsh |
| 1-0 | 36 |
1968 |
Riga Ch Chess Club L | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 41. I Platonov vs Savon |
 | 1-0 | 24 |
1968 |
USSR | B07 Pirc |
| 42. I Platonov vs Kholmov |
| 0-1 | 47 |
1968 |
USSR Championship 1968/69 | E44 Nimzo-Indian, Fischer Variation, 5.Ne2 |
| 43. Bagirov vs I Platonov |
| ½-½ | 17 |
1968 |
12, Alma Ata | D20 Queen's Gambit Accepted |
| 44. Minic vs I Platonov |
| 1-0 | 41 |
1968 |
Sochi (Russia) | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 45. Gurgenidze vs I Platonov |
| ½-½ | 41 |
1968 |
USSR Championship 1968/69 | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 46. I Platonov vs Podgaets |
| ½-½ | 15 |
1968 |
USSR Championship 1968/69 | B18 Caro-Kann, Classical |
| 47. J Petkevich vs I Platonov |
| 0-1 | 38 |
1968 |
Riga Ch Chess Club L | A57 Benko Gambit |
| 48. I Platonov vs Tseshkovsky |
| 1-0 | 25 |
1968 |
USSR Championship 1968/69 | E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation |
| 49. Bagirov vs I Platonov |
| ½-½ | 17 |
1968 |
USSR Championship 1968/69 | D20 Queen's Gambit Accepted |
| 50. I Zaitsev vs I Platonov |
| 1-0 | 38 |
1968 |
USSR Championship 1968/69 | B09 Pirc, Austrian Attack |