Aman Ahuja writes:

>My curiousity is aroused, however.  What pieces _are_ usually considered
>the most "difficult" piano music? What does one mean by "difficult" in the
>first place?

Beyond doubt, Beethoven op. 106 (the "Hammerklavier") is technically,
intellectually, musically, in every way, the most difficult masterpiece
written for the piano. Nothing else even comes close.

Leslie Kinton
Piano Faculty, The Glenn Gould Professional School,
Anagnoson and Kinton piano duo website: http://www.pianoduo.com