Wolfgang Amadeus Mozart Piano Sonatas Vol 1: Edition without fingering; Urtext Edition - piano; editor: Herttrich, Ernst. When Günter Henle founded his Urtext publishing company in 1948 he began his catalogue with a two-volume edition (HN 1 and HN 2) of Mozart’s 18 piano sonatas. These sonatas remain part of the core repertory of every pianist. HN 1 and HN 2 include fingerings; both volumes are now presented without fingerings, for pianists who want to find their own way into Mozart’s universe.