| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. Browne vs Y Gruenfeld |
| ½-½ | 53 |
1979 |
Lone Pine | E17 Queen's Indian |
| 27. Y Gruenfeld vs Mednis |
| 1-0 | 36 |
1979 |
Riga izt | C05 French, Tarrasch |
| 28. Y Gruenfeld vs Tarjan |
| 1-0 | 40 |
1979 |
Riga izt ,IZT | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 29. Chandler vs Y Gruenfeld |
 | 0-1 | 28 |
1979 |
Lone Pine | B10 Caro-Kann |
| 30. Y Gruenfeld vs R Rodriguez |
| 1-0 | 29 |
1979 |
Riga izt | B81 Sicilian, Scheveningen, Keres Attack |
| 31. Y Gruenfeld vs A Lein |
| ½-½ | 59 |
1979 |
Lone Pine | C06 French, Tarrasch |
| 32. Y Gruenfeld vs Adorjan |
| ½-½ | 15 |
1979 |
Izt (cat.12) | B33 Sicilian |
| 33. Y Gruenfeld vs Quinteros |
| 0-1 | 25 |
1979 |
Lone Pine | B97 Sicilian, Najdorf |
| 34. H Van Riemsdijk vs Y Gruenfeld |
| 1-0 | 40 |
1979 |
Riga izt | B95 Sicilian, Najdorf, 6...e6 |
| 35. Tarjan vs Y Gruenfeld |
| ½-½ | 63 |
1979 |
Lone Pine | E19 Queen's Indian, Old Main line, 9.Qxc3 |
| 36. J Benjamin vs Y Gruenfeld |
| 0-1 | 53 |
1979 |
Lone Pine | B50 Sicilian |
| 37. F Trois vs Y Gruenfeld |
| ½-½ | 42 |
1979 |
Riga izt | A15 English |
| 38. Y Gruenfeld vs Tringov |
| ½-½ | 25 |
1980 |
Malta ol (Men) | B42 Sicilian, Kan |
| 39. Y Gruenfeld vs L Schneider |
| ½-½ | 39 |
1980 |
Malta ol (Men) | A19 English, Mikenas-Carls, Sicilian Variation |
| 40. Y Gruenfeld vs J Fleck |
| ½-½ | 25 |
1980 |
Lugano op | B33 Sicilian |
| 41. I Farago vs Y Gruenfeld |
| 1-0 | 36 |
1980 |
Malta ol (Men) | D37 Queen's Gambit Declined |
| 42. Y Gruenfeld vs Nunn |
| 0-1 | 28 |
1980 |
Malta ol | B09 Pirc, Austrian Attack |
| 43. Tringov vs Y Gruenfeld |
| ½-½ | 49 |
1980 |
EU-chT (Men) | C63 Ruy Lopez, Schliemann Defense |
| 44. Y Gruenfeld vs O C Moen |
| 1-0 | 40 |
1980 |
Malta ol (Men) | C70 Ruy Lopez |
| 45. Y Gruenfeld vs Petrosian |
 | ½-½ | 14 |
1980 |
Skara | C07 French, Tarrasch |
| 46. Y Gruenfeld vs J A Rubinetti |
| 1-0 | 33 |
1980 |
Malta ol (Men) | C66 Ruy Lopez |
| 47. Y Gruenfeld vs Murey |
| ½-½ | 30 |
1980 |
Beersheba | C82 Ruy Lopez, Open |
| 48. M V Ghinda vs Y Gruenfeld |
| 1-0 | 62 |
1980 |
Malta ol (Men) | B90 Sicilian, Najdorf |
| 49. Y Gruenfeld vs Z Vranesic |
| 1-0 | 35 |
1980 |
Malta ol (Men) | B16 Caro-Kann, Bronstein-Larsen Variation |
| 50. Y Gruenfeld vs L Karlsson |
| 1-0 | 54 |
1980 |
7th ETCh final | C05 French, Tarrasch |