I'm hoping to have a go at the Chopin Nocturne (Posth.) that was on the 2017/18 Grade 7 syllabus. In this (as in many (all?)) of Chopin's Nocturnes, there are some runs in the RH of varying numbers of notes against a steady LH.
Obviously in the piece I'm referring to, there's some 3 against 2's, and obviously you play those straight - three even notes against two even notes, and that's quite easy. Also 5 against 2, clearly that's also five even notes.
But 17 against 4? 35 against 4? I am guessing at my level, fitting the notes into the quavers works fine, i.e. for 35 against 4 you'd do one lot of 8 and three lots of 9 - but do "proper" pianists do that? Or can they really do 17 / 35 / whatever completely even notes against 4 quavers?
And as an afterthought, what's the hardest of these cross rhythms anyone's tried? Say a 7 against 5 or something? Anyone come across that type of thing?