As is the case with quite a few of his works, there are two versions of Schumann's opus 14 - a three-movement Concert sans Orchestre from 1836 and a Grande Sonate in five movements from 1853. We do not know the reason for the revision; the publisher of the first version was, however, delighted; he considered the idea of the concerto to be very up-to-date. Perhaps Schumann later reacted to what the dedicatee Ignaz Moscheles had said that the piece had less of the demands of a concerto and more the characteristics of a grand sonata. In our revised edition, which now also contains the complete early version, the editor Ernst Herttrich provides detailed information on both versions in an extensive preface and commentary.