Sonata for Keyboard Four-hands in C major, K. 19d is a sonata composed by the 9-year old Wolfgang Amadeus Mozart in May 1765 when he was in London during the Mozart family's Grand Tour of Europe. It was probably first performed by Mozart in Hickford's Great Room, Brewer Street, accompanied by his sister Maria Anna Mozart on 13 May 1765.[1] It is, as most (if not all) of his early works, heavily influenced by his father Leopold Mozart and other composers who were close to Mozart, e.g. Johann Christian Bach. Recent scholarship has suggested that the work is likely not composed by Mozart.[2]
The sonata is laid out in three movements: