What do Edvard Grieg and Ignaz Moscheles have in common? Aside from being European composers of the second half of the nineteenth century, they both felt certain classics of the solo piano repertoire could use a supplemental second piano. Grieg wrote a second piano part to three Mozart piano sonatas, and Moscheles practically rewrote 10 preludes from the Well-Tempered Clavier, conceiving of
