| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 501. J de Souza Mendes vs J Pinto Paiva |
| ½-½ | 43 | 1966 | Brazilian Championship | C70 Ruy Lopez |
| 502. A Teofilo vs J de Souza Mendes |
| 1-0 | 20 | 1966 | Brazilian Championship | A41 Queen's Pawn Game (with ...d6) |
| 503. J de Souza Mendes vs E Asfora |
| 1-0 | 36 | 1966 | Brazilian Championship | B43 Sicilian, Kan, 5.Nc3 |
| 504. F G Pimentel vs J de Souza Mendes |
| 0-1 | 79 | 1966 | Brazilian Championship | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 505. J de Souza Mendes vs E Cotta |
| ½-½ | 22 | 1966 | Brazilian Championship | C92 Ruy Lopez, Closed |
| 506. E Cotta vs J de Souza Mendes |
| ½-½ | 42 | 1967 | Brazilian Championship | B06 Robatsch |
| 507. J de Souza Mendes vs L Tavares da Silva |
| 0-1 | 49 | 1967 | Brazilian Championship | D87 Grunfeld, Exchange |
| 508. F G Pimentel vs J de Souza Mendes |
| ½-½ | 32 | 1967 | Brazilian Championship | B06 Robatsch |
| 509. J de Souza Mendes vs F Leite |
| ½-½ | 55 | 1967 | Brazilian Championship | C69 Ruy Lopez, Exchange, Gligoric Variation |
| 510. J Mangini vs J de Souza Mendes |
| ½-½ | 37 | 1967 | Brazilian Championship | B58 Sicilian |
| 511. J de Souza Mendes vs S Ribeiro |
| 1-0 | 27 | 1967 | Brazilian Championship | B88 Sicilian, Fischer-Sozin Attack |
| 512. O Gadia vs J de Souza Mendes |
| 1-0 | 45 | 1967 | Brazilian Championship | A36 English |
| 513. J de Souza Mendes vs H Camara |
| 1-0 | 37 | 1967 | Brazilian Championship | B06 Robatsch |
| 514. P Segundo da Costa vs J de Souza Mendes |
| 0-1 | 60 | 1967 | Brazilian Championship | A42 Modern Defense, Averbakh System |
Kibitzing
