An study in sixths sounding in melodious triplets, which can be harmful to a small hand if not practiced with care. Its perpetual motion can only be rendered by a fully developed master of the keyboard, one whose ears are as sensitive to Chopin's daring harmonies as his fingers are to its technical demands.

Von Bulow thought of it as "the most useful exercise in the whole range of the Etude literature."

Kullak finds this study "surprisingly euphonious, but devoid of depth of content."