The Karlovy Vary IFF first held an international film competition in 1948. Since 1951, an international jury has evaluated the films. The Karlovy Vary competition quickly found a place among other developing festivals and by 1956 FIAPF had already classified Karlovy Vary as a category A festival. Given the creation of the Moscow Film Festival and the political decision to organize only one "A" festival for all socialist countries, Karlovy Vary was forced to alternate year by year with Moscow IFF between 1959 and 1993.