Seven most difficult pieces of classical music

'Piano Concerto Op. 160' by virtuoso pianist and composer Adolf von Henselt was too hard to play even for Russian pianist virtuoso Anton Rubinstein who called Henselt "a freak”. Von Henselt's fingers had an unusual elasticity that allowed him to achieve a technique most players cannot hope for no matter how much they practise - Ludwig van writes as it chooses 7 most difficult classical music pieces to perform.