| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. H Gruenberg vs J Brueggemann |
| 1-0 | 41 | 1973 | East German Championship | A99 Dutch, Ilyin-Genevsky Variation with b3 |
| 27. H Gruenberg vs L Zinn |
| ½-½ | 45 | 1973 | East German Championship | A44 Old Benoni Defense |
| 28. G Moehring vs H Gruenberg |
| 1-0 | 55 | 1973 | East German Championship | A59 Benko Gambit |
| 29. O Thal vs H Gruenberg |
| 1-0 | 77 | 1973 | East German Championship | A01 Nimzovich-Larsen Attack |
| 30. H Gruenberg vs G Walter |
| ½-½ | 54 | 1973 | East German Championship | D63 Queen's Gambit Declined, Orthodox Defense |
| 31. H Gruenberg vs M Schoeneberg |
| 0-1 | 36 | 1973 | East German Championship | A41 Queen's Pawn Game (with ...d6) |
| 32. H Gruenberg vs Knaak |
| ½-½ | 28 | 1973 | East German Championship | E00 Queen's Pawn Game |
| 33. T Espig vs H Gruenberg |
| ½-½ | 9 | 1973 | East German Championship | B23 Sicilian, Closed |
| 34. A Hennings vs H Gruenberg |
| ½-½ | 23 | 1973 | East German Championship | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 35. L Vogt vs H Gruenberg |
| ½-½ | 26 | 1973 | East German Championship | B92 Sicilian, Najdorf, Opocensky Variation |
| 36. H Gruenberg vs H Liebert |
| ½-½ | 24 | 1973 | East German Championship | D87 Grunfeld, Exchange |
| 37. H Packroff vs H Gruenberg |
| ½-½ | 22 | 1973 | East German Championship | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 38. P Hesse vs H Gruenberg |
| ½-½ | 25 | 1973 | East German Championship | E10 Queen's Pawn Game |
| 39. J Lechtynsky vs H Gruenberg |
| 1-0 | 45 | 1973 | CSR-GDR | B22 Sicilian, Alapin |
| 40. H Gruenberg vs J Lechtynsky |
| ½-½ | 74 | 1973 | CSR-GDR | A99 Dutch, Ilyin-Genevsky Variation with b3 |
| 41. H Gruenberg vs L Vogt |
| ½-½ | 26 | 1973 | Leipzig DSV | E73 King's Indian |
| 42. G Atanasov vs H Gruenberg |
| 1-0 | 30 | 1973 | Leipzig DSV | D02 Queen's Pawn Game |
| 43. Jansa vs H Gruenberg |
 | 1-0 | 63 | 1973 | Leipzig DSV | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 44. B Malich vs H Gruenberg |
| 1-0 | 31 | 1973 | Leipzig DSV | A46 Queen's Pawn Game |
| 45. H Gruenberg vs Knaak |
| 0-1 | 29 | 1973 | Leipzig DSV | A32 English, Symmetrical Variation |
| 46. L Zinn vs H Gruenberg |
| 1-0 | 39 | 1973 | Leipzig DSV | B04 Alekhine's Defense, Modern |
| 47. H Gruenberg vs A Hennings |
| 0-1 | 57 | 1973 | Leipzig DSV | D17 Queen's Gambit Declined Slav |
| 48. Balashov vs H Gruenberg |
| ½-½ | 35 | 1973 | Leipzig DSV | B23 Sicilian, Closed |
| 49. H Liebert vs H Gruenberg |
| 0-1 | 44 | 1973 | Leipzig DSV | B36 Sicilian, Accelerated Fianchetto |
| 50. H Gruenberg vs G Garcia Gonzalez |
| 1-0 | 47 | 1973 | Leipzig DSV | E00 Queen's Pawn Game |
Kibitzing
