Series Editors: John Rink, Jim Samson, Jean-Jacques Eigeldinger. Editorial Consultant: Christophe Grabowski. Key Features of the Edition: • An introductory essay in English, German and French examiningthe historical background, compositional features and performance practice issues • The identification of, and adherence to, a single principal source • A detailed and comprehensive critical commentary • Chopin's authentic fingerings only • Emphasis placed on retaining expressive features of the original notation • Notes on the editorial principles and methodology guiding the whole project.