Game |
| Result | Moves |
Year | Event/Locale | Opening |
26. R Grinberg vs Letelier |
| 1-0 | 48 | 1975 | Buenos Aires Club Argentino | C04 French, Tarrasch, Guimard Main line |
27. R Grinberg vs H de la Vega |
| ½-½ | 78 | 1975 | Buenos Aires Club Argentino | B53 Sicilian |
28. S Schweber vs R Grinberg |
| ½-½ | 19 | 1975 | Buenos Aires Club Argentino | D37 Queen's Gambit Declined |
29. R Garcia vs R Grinberg |
| ½-½ | 24 | 1975 | Buenos Aires Club Argentino | A30 English, Symmetrical |
30. A Kostka vs R Grinberg |
| 0-1 | 90 | 1975 | Buenos Aires Club Argentino | B81 Sicilian, Scheveningen, Keres Attack |
31. R Grinberg vs A E Seidler |
| 1-0 | 25 | 1975 | Buenos Aires Club Argentino | B92 Sicilian, Najdorf, Opocensky Variation |
32. O Cuasnicu vs R Grinberg |
| 1-0 | 24 | 1975 | Buenos Aires Club Argentino | B80 Sicilian, Scheveningen |
33. J Szmetan vs R Grinberg |
| 1-0 | 41 | 1975 | Buenos Aires Club Argentino | B86 Sicilian, Fischer-Sozin Attack |
34. R Grinberg vs L Bronstein |
| 1-0 | 22 | 1976 | Mar del Plata | C99 Ruy Lopez, Closed, Chigorin, 12...cd |
35. F Braga vs R Grinberg |
| 1-0 | 43 | 1977 | Buenos Aires + ch-AR | B82 Sicilian, Scheveningen |
36. R Grinberg vs J Szmetan |
| 1-0 | 56 | 1978 | ARG-ch54 m playoff 6th place | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
37. R Grinberg vs J Szmetan |
| 0-1 | 21 | 1978 | ARG-ch54 m playoff 6th place | C63 Ruy Lopez, Schliemann Defense |
38. J Szmetan vs R Grinberg |
| ½-½ | 41 | 1978 | ARG-ch54 m playoff 6th place | A13 English |
39. J Szmetan vs R Grinberg |
| ½-½ | 62 | 1978 | ARG-ch54 m playoff 6th place | A15 English |
40. J Szmetan vs R Grinberg |
| ½-½ | 41 | 1978 | ARG-ch | B46 Sicilian, Taimanov Variation |
41. R Grinberg vs Nunn |
| 0-1 | 40 | 1978 | Buenos Aires Olympiad | B93 Sicilian, Najdorf, 6.f4 |
42. J Arnason vs R Grinberg |
| 0-1 | 67 | 1978 | Buenos Aires Olympiad | B83 Sicilian |
43. J L Pelaez Contti vs R Grinberg |
| 0-1 | 34 | 1978 | Buenos Aires Olympiad | A77 Benoni, Classical, 9...Re8, 10.Nd2 |
44. R Grinberg vs A Duer |
| 0-1 | 37 | 1978 | Buenos Aires Olympiad | B44 Sicilian |
45. R Grinberg vs C Paglilla |
| 0-1 | 47 | 1985 | Argentine Championship | B49 Sicilian, Taimanov Variation |
46. R Grinberg vs G Barbero |
| 0-1 | 38 | 1985 | Argentine Championship | C84 Ruy Lopez, Closed |
47. E Miana vs R Grinberg |
| 0-1 | 49 | 1985 | Argentine Championship | A60 Benoni Defense |
48. R Grinberg vs P Ricardi |
| 1-0 | 43 | 1985 | Argentine Championship | B93 Sicilian, Najdorf, 6.f4 |
49. T Darcyl vs R Grinberg |
| 1-0 | 54 | 1985 | Argentine Championship | A56 Benoni Defense |
50. R Grinberg vs S Giardelli |
| ½-½ | 10 | 1985 | Argentine Championship | B42 Sicilian, Kan |