The twenty-first of them begins with repeated soft driving chords, while the twenty-ninth of them closes with an enormous three-voice fugue, and is dedicated to their composer's patron (*) Archduke Rudolf.
Daniel Barenboim gave a series of televised masterclasses about these works with pianists such as Jonathan Biss and Lang Lang. Professional pianists call these works the "New Testament," in comparison to the "Old Testament" of the Well-Tempered Clavier. The twelfth of them broke with classical tradition by containing a second movement scherzo and a third movement funeral march. The twenty-first of them begins with repeated soft driving chords, while the twenty-ninth of them closes with an enormous three-voice fugue, and is dedicated to their composer's patron (*) Archduke Rudolf. The fourteenth of them is in the key of C sharp minor, and begins with a movement in which the left hand plays octaves while the right hand plays soft triplets. For 10 points, name these thirty-two piano pieces that include ones nicknamed "Waldstein," "Hammerklavier," and "Moonlight."
Daniel Barenboim gave a series of televised masterclasses about these works with pianists such as Jonathan Biss and Lang Lang.
Ludwig van {Beethoven's piano sonatas} [prompt on partial answer]