Prokofiev's Suggestion Diabolique Op. 4. No. 4 is arguably
the most difficult piece in the piano literature (there are other
contenders like Islamey and Schuman's Toccata, but for sheer
concentrated brilliance and technical demands, I pick Prokofiev,
even over his Toccata).  After a bumpy start, the 7-note theme
is bounced around all octaves, sometimes in minor 9th octaves,
accompanied by breathtaking runs and topped off by a double
glissando.

gary goldberg <76236.3302@compuserve.com>