Luis Palau (11 September 1896 – 1971) was an Argentine chess master (IM). He played in three Chess Olympiads (one unofficial) and became champion of South America at Montevideo 1925. He was director of the magazine «El Ajedrez Americano». He beat Euwe, Stoltz, Czerniak, Bolbochan. (Fuente: https://x.com/JustChessMini/status/1833743882141491244/photo/1)