Walter Oswaldo Cruz (23 January 1910, in Petropolis – 3 January 1967, in Rio de Janeiro) was a Brazilian chess master.[1]
He was six-time Brazilian Champion (1938, 1940, 1942, 1948, 1949, 1953) and thrice Sub-Champion (1928, 1929, 1939). He played for Brazil in the 8th Chess Olympiad at Buenos Aires 1939 (third board, +4 –7 =5).[2]