Part of 'The Complete Chopin - A New Critical Edition'. Chopin was a perpetual reviser, sometimes almost obsessively so. He was quite capable of sending radically differing versions of the same piece to the various publishers. The unique attribute of this new edition is that it follows scrupulously a 'single best source' for each piece, so that the piece is presented exactly as Chopin would have known it at a particlar juncture.Only Chopin's own fingering, as authenticated by the sources, is indica ted. Sometimes unorthodox, these fingerings afford us a compelling insight into Chopin's own expressive intentions and performance style.