Czech Grandmaster in composition (1975), IJC 1956 and Lawyer. From 1930 he composed more than 500 studies and problems collected in his book
Vybrane Sachove Problemy (1979). Fritz was a follower of the Bohemian chess school; his studies invariably ended in pretty and correct checkmates or stalemates. He paid much attention to echo motifs and classical domination and was in his element in lively piece play. With his fine composing technique, he was able to embody the most complicated ideas in miniature form. He wrote several books including
Moderni sachove studie (1951) and
Vybrane Sachove Problemy (1979).