A while ago I posted some orchestra-only tracks of Rachmaninoff's Paganini Variations, and invited people to submit performances of the piano part so I could wrap my orchestra round it. Alas non-one was up for it (it is a technically challenging piece).
Here are orchestra-only tracks of my favourite Beethoven concerto - no 4. And another invitation for recordings of the piano part. Not so technically difficult but certainly a challenging piece. Same deal as last time, for which see my previous post.
https://www.pianostreet.com/smf/index.php?topic=61413.0