| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. Keres vs M Campos Lopez |
| 1-0 | 41 | 1972 | San Antonio | C87 Ruy Lopez |
| 27. M Campos Lopez vs Mecking |
 | 0-1 | 65 | 1972 | San Antonio | B84 Sicilian, Scheveningen |
| 28. A Saidy vs M Campos Lopez |
| 0-1 | 53 | 1972 | San Antonio | A79 Benoni, Classical, 11.f3 |
| 29. M Campos Lopez vs Browne |
| 1-0 | 61 | 1972 | San Antonio | B92 Sicilian, Najdorf, Opocensky Variation |
| 30. Larsen vs M Campos Lopez |
 | 1-0 | 30 | 1972 | San Antonio | A36 English |
| 31. M Campos Lopez vs Hort |
| 0-1 | 43 | 1972 | San Antonio | B07 Pirc |
| 32. M Campos Lopez vs Suttles |
| 0-1 | 39 | 1972 | San Antonio | B06 Robatsch |
| 33. D Byrne vs M Campos Lopez |
| 1-0 | 31 | 1972 | San Antonio | A36 English |
| 34. M Campos Lopez vs Petrosian |
| 0-1 | 33 | 1972 | San Antonio | C16 French, Winawer |
| 35. Gligoric vs M Campos Lopez |
| 1-0 | 72 | 1972 | San Antonio | A75 Benoni, Classical with ...a6 and 10...Bg4 |
| 36. M Campos Lopez vs R Garcia |
| ½-½ | 34 | 1973 | Buenos Aires CA | B82 Sicilian, Scheveningen |
| 37. O Rodriguez Vargas vs M Campos Lopez |
| 1-0 | 36 | 1973 | Buenos Aires CA | B02 Alekhine's Defense |
| 38. M Campos Lopez vs V Palermo |
| 0-1 | 51 | 1973 | Buenos Aires CA | C50 Giuoco Piano |
| 39. Pilnik vs M Campos Lopez |
| ½-½ | 74 | 1973 | Buenos Aires CA | B02 Alekhine's Defense |
| 40. M Campos Lopez vs J Emma |
| ½-½ | 28 | 1973 | Buenos Aires CA | B00 Uncommon King's Pawn Opening |
| 41. C G Poch vs M Campos Lopez |
| 1-0 | 53 | 1973 | Buenos Aires CA | E91 King's Indian |
| 42. M Campos Lopez vs S Schweber |
| ½-½ | 36 | 1973 | Buenos Aires CA | A07 King's Indian Attack |
| 43. H Rossetto vs M Campos Lopez |
| 0-1 | 54 | 1973 | Buenos Aires CA | A02 Bird's Opening |
| 44. M Campos Lopez vs J Szmetan |
| 1-0 | 56 | 1973 | Buenos Aires CA | B84 Sicilian, Scheveningen |
| 45. M Campos Lopez vs Najdorf |
| 1-0 | 49 | 1973 | Buenos Aires CA | A48 King's Indian |
| 46. J Rubinetti vs M Campos Lopez |
| 1-0 | 55 | 1973 | Buenos Aires CA | E75 King's Indian, Averbakh, Main line |
| 47. M Campos Lopez vs O Cuasnicu |
| 0-1 | 51 | 1973 | Buenos Aires CA | B48 Sicilian, Taimanov Variation |
| 48. C Cuartas vs M Campos Lopez |
| ½-½ | 24 | 1973 | Buenos Aires CA | C45 Scotch Game |
| 49. M Campos Lopez vs W Serrano |
| 1-0 | 25 | 1974 | Capablanca Memorial-B | B32 Sicilian |
| 50. M Campos Lopez vs J L Vilela |
| ½-½ | 57 | 1974 | Capablanca Memorial-B | C16 French, Winawer |
Kibitzing
