sentences:  Claiming to be respecting the composer's own wishes, he created two-hand redistributions of the left-hand works that Schmidt had written for Paul Wittgenstein, although Wittgenstein evidently voiced strong objections.Besides editing the Etudes, Wührer wrote "18 Studies on Chopin Etudes in Contrary Motion" (1958) as a pedagogical work for equalising the facility of both hands.Wührer also composed and published cadenzas for Mozart's piano concerti in C major, K. 467; C minor, K. 491; and D major, K. 537.