| De Souza, Regis Gabetta2221 | 1-0 | Freitas, Ronan Cunha1898 | 9th Floripa Open 2023 | 2023 |
| Caceres Benitez, Arturo Eduardo1944 | ½-½ | De Souza, Regis Gabetta2221 | 9th Floripa Open 2023 | 2023 |
| De Souza, Regis Gabetta2221 | ½-½ | Muzzi, E1917 | 9th Floripa Open 2023 | 2023 |
| Pontes, Israel Fillip da Silva1947 | ½-½ | De Souza, Regis Gabetta2221 | 9th Floripa Open 2023 | 2023 |
| De Souza, Regis Gabetta2221 | 1-0 | Barbosa, Flavio Novais1863 | 9th Floripa Open 2023 | 2023 |
| Fraga, Heitor Carneiro1556 | 0-1 | De Souza, Regis Gabetta2221 | 9th Floripa Open 2023 | 2023 |
| De Souza, Regis Gabetta2221 | 0-1 | Nunes, Ag1823 | 9th Floripa Open 2023 | 2023 |
| Kim, Thiago1980 | 1-0 | De Souza, Regis Gabetta2221 | 9th Floripa Open 2023 | 2023 |
| De Souza, Regis Gabetta2221 | 1-0 | De Souza Monteiro, Marcos Paulo1869 | 9th Floripa Open 2023 | 2023 |
| Cunha, Angelo1606 | 0-1 | De Souza, Regis Gabetta2221 | 9th Floripa Open 2023 | 2023 |
| De Souza, Regis Gabetta2245 | 1-0 | Lima, Vinicius Taishun2002 | II Niteroi Chess Open | 2022 |
| Morais, Wagner Soares De1845 | 0-1 | De Souza, Regis Gabetta2245 | II Niteroi Chess Open | 2022 |
| De Souza, Regis Gabetta2245 | 0-1 | Da Matta, Eduardo Cesar2038 | II Niteroi Chess Open | 2022 |
| Santiago, Y2448 | 1-0 | De Souza, Regis Gabetta2245 | II Niteroi Chess Open | 2022 |
| De Souza, Regis Gabetta2245 | 1-0 | Simas, Breno Matos1749 | II Niteroi Chess Open | 2022 |