Siegfried Rapp (1917 - 1977) was a German pianist who lost his right arm during World War II and then focused on the left-hand repertoire.
[3] Around 1950, Rapp sought permission from Paul Wittgenstein, the left-handed dedicatee of Prokofiev's 4th Piano Concerto (for the left hand), to perform the work himself.
Prokofiev had written the concerto in 1931 for Wittgenstein, who had the exclusive right to play it during his lifetime, but 19 years on, it still lay unperformed because the pianist could not come to terms with its inner logic.
[4] Wittgenstein refused Rapp's request to premiere the piece in no uncertain terms, writing to him in June 1950: You don't build a house just so that someone else can live in it.
[4] Reaction to the performance was lukewarm, leading Rapp to say, "Right after the war, with so many disabled veterans around, I found genuine sympathy among audiences.