Same as the other, although instead of posting snippets of a recording, post a few measures of the piece. I put these in order of easiest to most difficult, although I should note that none of these are especially "impossible"; all well-known composers, although the last one is a piece that I doubt anyone is familiar with, making it extra-tricky. But the writing is pretty iconoclastic to his style, so if you bang it out on the piano you can probably figure it out.
No. 1:
No. 2:
No. 3:
No. 4:
No. 5:
No. 6
Topic: Name that Tune (Sheet Music Edition)