Alberto Cobo wrote:

>There are not difficult pieces in the piano. Or all the pieces are
>difficult.  When you have to carry out some arrangement like in the
>Goldberg Variations of Bach or Albeniz's Iberia can it take more time.
>La Campanella is not a more difficult study that anyone of Chopin.

With all due respect, I think that this answer is too artsy.  There are
easy pieces to play and there are hard ones.  There are easy pieces to
interpret and there are hard ones.  The Mozart Twinkle Twinkle variations
are pretty easy.  The Goldberg variations are not.

Kevin