| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. J H Donner vs Portisch |
 | 1-0 | 47 | 1960 | Madrid Zonal playoff | E31 Nimzo-Indian, Leningrad, Main line |
| 27. D Abakarov vs E Lazarev |
| 0-1 | 45 | 1961 | Kiev Championship | E31 Nimzo-Indian, Leningrad, Main line |
| 28. J H Donner vs F Kuijpers |
| 1-0 | 43 | 1961 | Amsterdam IBM | E31 Nimzo-Indian, Leningrad, Main line |
| 29. B Gurgenidze vs Y Estrin |
| ½-½ | 57 | 1962 | URS-ch sf Spartak-ch | E31 Nimzo-Indian, Leningrad, Main line |
| 30. J G Sullivan vs K Burger |
| 0-1 | 67 | 1962 | 63rd US Open | E31 Nimzo-Indian, Leningrad, Main line |
| 31. Bagirov vs M Mukhitdinov |
| ½-½ | 39 | 1962 | URS-ch semifinal Novosibirsk | E31 Nimzo-Indian, Leningrad, Main line |
| 32. S Johannessen vs N Minev |
| ½-½ | 76 | 1963 | Halle Zonal | E31 Nimzo-Indian, Leningrad, Main line |
| 33. Gufeld vs Y Sakharov |
| 0-1 | 38 | 1964 | Ukrainian Championship | E31 Nimzo-Indian, Leningrad, Main line |
| 34. Keene / Burnett vs Sully / Tyrell / Jones |
| 1-0 | 22 | 1964 | Consultation game | E31 Nimzo-Indian, Leningrad, Main line |
| 35. J Mora Corbera vs Keres |
| 0-1 | 33 | 1964 | Tel Aviv Olympiad Final-A | E31 Nimzo-Indian, Leningrad, Main line |
| 36. S Johannessen vs A Matanovic |
| ½-½ | 27 | 1965 | Hoogovens | E31 Nimzo-Indian, Leningrad, Main line |
| 37. Spassky vs Keres |
 | 1-0 | 50 | 1965 | Spassky - Keres Candidates Quarterfinal | E31 Nimzo-Indian, Leningrad, Main line |
| 38. L Joyner vs M Schulman |
| ½-½ | 82 | 1965 | Canadian Championship | E31 Nimzo-Indian, Leningrad, Main line |
| 39. H Berliner vs Y Rokhlin |
| 1-0 | 46 | 1965 | 5th Correspondence World Championship | E31 Nimzo-Indian, Leningrad, Main line |
| 40. Szabo vs J H Donner |
| ½-½ | 21 | 1965 | Amsterdam IBM | E31 Nimzo-Indian, Leningrad, Main line |
| 41. P Struner vs F Kuijpers |
| 0-1 | 42 | 1966 | Clare Benedict Cup | E31 Nimzo-Indian, Leningrad, Main line |
| 42. M Litmanowicz vs E Keller-Herrmann |
| ½-½ | 20 | 1966 | Varna Zonal (Women) | E31 Nimzo-Indian, Leningrad, Main line |
| 43. M J Freeman vs J Mollekens |
| 1-0 | 33 | 1966 | Havana Olympiad Final-B | E31 Nimzo-Indian, Leningrad, Main line |
| 44. A Lukin vs Karpov |
| 0-1 | 58 | 1967 | Junior Qualification Tournament - semifinal-1 | E31 Nimzo-Indian, Leningrad, Main line |
| 45. V Brond vs R A Redolfi |
| 1-0 | 36 | 1967 | Cordoba Open | E31 Nimzo-Indian, Leningrad, Main line |
| 46. J Kristinsson vs M Johansson |
| ½-½ | 45 | 1967 | Halle Zonal | E31 Nimzo-Indian, Leningrad, Main line |
| 47. H Ree vs K Langeweg |
| 1-0 | 39 | 1967 | Dutch Championship | E31 Nimzo-Indian, Leningrad, Main line |
| 48. V Vaisman vs S Neamtu |
| ½-½ | 45 | 1967 | Romanian Championship | E31 Nimzo-Indian, Leningrad, Main line |
| 49. Bagirov vs S Zinser |
| 1-0 | 40 | 1968 | Moscow | E31 Nimzo-Indian, Leningrad, Main line |
| 50. H Lehmann vs S Tatai |
| 0-1 | 49 | 1968 | Solingen | E31 Nimzo-Indian, Leningrad, Main line |
Kibitzing
