Trills in Chopin?!

Trills in Chopin?

I'm currently working on Chopin's Heroic Polonaise, and in one section there is an accacciatura going into a trill needing to be played with fingers 4 and 5. What trill exercises can I use to be able to play this? 4 and 5 is extremely difficult, and I can't even begin to play the trill. Please help?

5 days ago
Note: This piece is for piano.

Scott, I think I know where you mean: it occurs for the first time around bar 60-61? The accacciatura is an octave leap up, into the 'd-flat' trill? The fingering in your score is somewhat didactic. I finger that a top-speed (34) trill resolving to a (!2) or (13) octave. Alternatively, if that resolving (12) or (13) span causes you grief, you can trill a mixed trill (3545) to gain velocity and brilliance but still resolve to (13). (You'll have to tackle top-speed (45) trills at some point, mind you... <g>) In the repeat in the next bar, you do the same thing, trilling the 'd-flat' (34), trilling the ensuing 'd' (14) to make the tension bite, and then trill the 'e-flat' (24) to resolve, comparatively, and achieve a single sweep gestural scalic rush from 'd' (1) to the restatement of the main subject, opening up your hand 'like a snake devouring its prey'....

Description is a pain... If anything is unclear, or your issue is at another location in the score, yelp in 'additional details' or feel free to rattle my cage anytime via my mailbox. :-)