Prelude No. 6 in D major is composed of two phrases and a short coda. The first phrase is eight measures long, while the second phrase has 13 measures. Here's the first phrase:

The first measures of the second phrase are similar to those of the first one. In measure 11, the VI degree chord transforms into a secondary dominant (G7) of B minor's Neapolitan sixth chord (C). The Neapolitan sixth chord persists from measure 12 to 14, sometimes in root position. A deceptive cadence in measure 18 helps to prolong the phrase until the cadence to the tonic in measure 22. A short coda (measures 22 to 25) ends the prelude:

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Complete Prelude:

Robert Ståhlbrand, piano. Courtesy of Piano Society

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