[Roger Knox]

I think the four concertos of F.X. Scharwenka belong on this list. They are attractive to listen to yet extremely challenging for the pianist -- Scharwenka wrote them for himself to perform. Steven Hough's recording of Nos. 1 and 4 is superb. In your very fine list, which seems well-prepared to me, Scharwenka's concertos would probably belong in your first three categories.

 

[Roger Knox]

I have indeed listened to the Scharwenka concerti. They are quite beautiful and look fairly difficult, but I am not sure where to put it quite yet. Most likely in the third category.

Number three or number two, I'm not sure either. Glenn Gould called one (I think No. 1) "a beast" and never played any of Scharwenka's concertos. There are some unusual figurations he worked out that are playable but require much extra practice.