Paul Wittgenstein

Paul Wittgenstein (November 5, 1887 – March 3, 1961) was an Austrian-American concert pianist notable for commissioning new piano concerti for the left hand alone, after his right arm was amputated during World War I. He devised novel techniques, including pedal and hand-movement combinations, that allowed him to play chords previously thought impossible for a five-fingered pianist.

He was an older brother of the philosopher Ludwig Wittgenstein.

Read more about this composer on Wikipedia.