Keys? 

I'm not familiar with the piece myself so am not fit to make edits, but I notice that the discussion of the first movement includes mention of some very outlandish keys like D-flat minor, D-sharp major, and F-flat major, all of which, while touched on occasionally in fleeting chromatic passages, are very unlikely to be a piece's true modulatory goal. I suspect that someone who thought it would be funny has added these in. If I am wrong in this suspicion and the piece really does go to all those unnecessarily heavy keys, ignore this comment.

76.118.3.9