The Gunderam Defense, also known as the Brazilian Defense or the Câmara Defense if followed by moves ...g6, ...Bg7 and ...Nf6, creating the typical King's Indian formation, is a rarely played chess opening starting with the moves: It is named after chess player and theoretician Gerhart Gunderam [de], though Hélder Câmara played it 4 years prior to Gunderam.

The opening was first played by International Master Hélder Câmara in 1954, in the IV Centennial of the City of São Paulo Tournament and the XXII Brazilian Chess Championship.

[1] Gunderam played it for the first time in a correspondence match against August Babel in 1958 and published an analysis of it in his book Neue Eröffnungswege, in 1961.

He named this defense "Damenverteidigung" ("Queen Defence"), whose main line would be 1. e4 e5 2.Nf3 Qe7 3.Nc3 c6 4.Bc4 f5.

[2] In 1969, Washington de Oliveira published a work dedicated to the analysis of Câmara's use of the opening, called Notas Sobre a Defesa Brasileira ("Annotations on the Brazilian Defense").