It's ironic that Chopin's most famous work, the Fantaisie-Impromptu, wasn't published during his lifetime. Today we actually have several different versions of it: the first edition by Chopin's friend Julian Fontana in 1855, recent Urtext editions that have removed Fontana's own additions, and one version based on a manuscript acquired by Rubinstein in 1962. 

Pianist Henrik Kilhamn goes through this fantastic piece of music that fits so well under the fingers, and points out where the versions differ. The stormy agitato sections give way to a lyrical cantabile middle section which posess all the sweetness but none of the melancholy of a Nocturne.

Introduction: 0:23

Analysis: 3.16

Performance: 15.52