How long does it have to be?Some generic suggestions:Ligeti etudes - L'escalier du diable, Desordre, Automne a Varsovie, Fanfares, White on White, and others.A movement from a Medtner sonata maybeRzewski - Squares, Four Pieces, North American BalladsSorabji - 1920 toccata, Carmen Pastiche if you're feeling crazy Messiaen - Something from Vingt Regards, or an etudePersichetti has some interesting sonatasCarter - Piano SonataIves - a movement from the Concord sonataAntheil - Airplane sonata, Jazz sonataTobias Picker - Four etudes for Ursula
Try some Rachmaninoff - he lived most of his life in the 20th Century. I recommend 23/5 (Prelude in G Minor). It's quite a physical piece that requires strong wrists, but it's well worth it.
I think Rhapsody in Blue would qualify, but it wouldn't work for the original poster because it isn't that difficult.
I guess you've never played it then!
Danielpour- The Enchanted Garden (take your pick- all difficult)
Jesus...
Well, in keeping with the great () suggestions people have been making so far, why not like... Cogluotobusisletmesi or Evryali? No, I know, the entire History of Photography in Sound. Or even better, Tract. Wait, I know, why not try ...when the panting STARTS? Maybe Sorabji Tantrik Symphony or Opus Archimagicum?
Play Rzewski's North American Ballad No. 4 The judges will mostly be familiar with the work, it's more difficult than, say, a movement from Prokofiev or Bartok Sonatas (although the Bartok Etudes Op. 18 might be another good suggestion, but are more difficult) (and also, keep in mind that there's no point in learning some MASSIVE work like that, because they will ask you to only play a movement) and the Rzewski NAB4 has an *extremely* good success rate at competitions and auditions.
So, besides avoiding a huge, 4 movement sonata, I suggestion avoiding Neo-Classicism altogether (because *everyone* will be playing Prok 2/6/7). I also suggest not playing a Futurist piece (composers such as Mosolov, Feinberg, Roslavets, Lourie etc.), and seriously, don't play something too intensely wild like Xenakis or Bussotti, or any of the New Complexity composers. There's nothing wrong with any of those composers, but it's just not what they're going to be looking for, and if you play something that just sounds like a pile of notes to someone who's not intimate with the piece, they have no way of judging your ability.
If you just HAVE to have something very very difficult, the 1st Movement of the Boulez Deuxieme Sonate pour Piano would probably be acceptable, if they allow movements. Most pianists are familiar *enough* with that piece.
Something by Jarret,
Haydn
Philip Glas
This piece is usually shoved to the back of the line due to the immense popularity of his other works, namely Herma and Evryali...
A- that's actually on a lot of conservatories' lists of, "here, choose one of these quasi-modern pieces".
B- you don't *want* a piece to be unknown to the jury.
C- it's not a substantial work.