Frédéric Chopin's four ballades are one-movement pieces for solo piano, composed between 1831 and 1842. They are some of the most challenging pieces in the standard piano repertoire.
The term ballade was used by Chopin in the sense of a balletic interlude or dance-piece, equivalent to the old Italian ballata, but the term may also have connotations of the medieval heroic ballad, a narrative minstrel-song, often of a fantastical character. There are dramatic and dance-like elements in Chopin's use of the genre, and he may be said to be a pioneer of the ballade as an abstract musical form. The four ballades are said to have been inspired by poet Adam Mickiewicz. The exact inspiration for each individual ballade, however, is unclear and disputed.
The ballades are considered an innovation of Chopin's and cannot be placed into another form (e.g. sonata). Though they do not conform exactly to sonata form, the "ballade form" created by Chopin for his four ballades is a distinct variant of sonata form with specific discrepancies, such as the mirror reprise (presenting the two expositional themes in reverse order during the recapitulation). The ballades have directly influenced composers such as Franz Liszt and Johannes Brahms who, after Chopin, wrote ballades of their own.
Besides sharing the title, the four ballades are entities distinct from each other. According to composer and music critic Louis Ehlert, "Each [ballade] differs entirely from the others, and they have but one thing in common – their romantic working out and the nobility of their motifs." Modern theorists have shown, however, that the ballades do have much in common, such as the "ballade meter" (6/4 or 6/8) and certain formal practices like the mirror reprise and delaying the structural dominant.