| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. Korchnoi vs Petrosian |
  | 1-0 | 56 | 1965 | Moscow-Leningrad | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 27. Csom vs P Dely |
| 0-1 | 24 | 1966 | Asztalos Memorial | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 28. M Miranda vs A Teofilo |
| ½-½ | 66 | 1966 | Brazilian Championship | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 29. V Zalcman vs I Platonov |
| 0-1 | 34 | 1966 | Spartakiada Ukraine | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 30. J F de Saboya vs H MacGrillen |
| ½-½ | 19 | 1968 | WchT U26 15th fin-B | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 31. A Buslaev vs V Osnos |
| 0-1 | 36 | 1969 | URS-chT | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 32. Vaganian vs Karpov |
| 0-1 | 30 | 1969 | World Jr Ch qual | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 33. H Bouwmeester vs R Teschner |
| 1-0 | 63 | 1969 | Clare Benedict Cup | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 34. Korchnoi vs Mecking |
| 1-0 | 32 | 1969 | Palma de Mallorca | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 35. Browne vs Parma |
| ½-½ | 24 | 1971 | Netanya | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 36. R Debarnot vs Najdorf |
| ½-½ | 63 | 1972 | Buenos Aires Club Argentino | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 37. A J Morley vs P Byway |
| 1-0 | 39 | 1972 | Islington Open | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 38. I Ivanov vs Korchnoi |
| 0-1 | 29 | 1973 | Leningrad Championship | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 39. Hort vs Geller |
| ½-½ | 48 | 1975 | Hoogovens | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 40. H Carvalho vs J Sunye Neto |
| 1-0 | 33 | 1980 | Brazilian Championship | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 41. G Jacoby vs W Schlemermeyer |
| ½-½ | 18 | 1981 | Bundesliga 1981/82 | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 42. G Turner vs T Palmer |
| ½-½ | 37 | 1983 | Motor City Open | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 43. I Ivanov vs Suba |
| ½-½ | 34 | 1984 | Hastings 1983/84 | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 44. N G dos Santos vs A Ticianeli |
| 0-1 | 40 | 1985 | Brazilian Championship | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 45. P Ricardi vs E Miana |
| 0-1 | 36 | 1986 | Argentine Championship | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 46. B Leverett vs A Karklins |
| 1-0 | 30 | 1986 | Midwest Masters | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 47. G Giorgadze vs M Chipashvili |
| ½-½ | 39 | 1986 | Georgian Championship | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 48. M Basman vs Chandler |
| 0-1 | 44 | 1986 | British Championship | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 49. M Bozovic vs S Vuksanovic |
| 1-0 | 47 | 1990 | Yugoslav Championship (Women) | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
| 50. Speelman vs B Abramovic |
| ½-½ | 64 | 1993 | Biel Interzonal | E50 Nimzo-Indian, 4.e3 O-O 5.Nf3, without ...d5 |
Kibitzing
