Contents: I. Introduzione -- II. Giuoco delle coppie -- III. Elegia -- IV. Intermezzo interrotto -- V. Finale. With a preface in German, English and French. Critical notes in German and English. This work was composed in 1943 on a commission from Serge Koussevitzky, music director of the Boston Symphony Orchestra. This study score is based on the text of the Bartok Complete Critical Edition.