These were written as a contribution to the Méthode des Méthodes, a piano instruction book by Ignaz Moscheles, and were not given a separate opus number. While less technically brilliant than those of opus 10 and opus 25, these three études nevertheless retain Chopin's original formula for harmonic and structural balance.
No. 1 in F minor has a long melody of restrained passion, its technical use being three notes in the right hand to be played against four in the left hand. No. 2, in A flat major, is all sweetness in its polyrhythmic movement. No. 3, in D flat major, is a wickedly difficult study which asks for the playing of legato and staccato simultaneously in the same hand. This counterpoint is enough to challenge the best of pianists.