I guess I am persuaded that a Man is a compound, since a Queen is, but that a Gold General can still be considered a Man/King subset.
I'm not persuaded, however, that an R4 would be a R subset. It depends what we are referring to as the items in the set. I consider it a set of move capabilities, not a set of potential destination squares. And I consider a range-limited slide a different move capability than an unlimited slide. I certainly don't consider a dabbabahrider a subset of a rook.
I guess I am persuaded that a Man is a compound, since a Queen is, but that a Gold General can still be considered a Man/King subset.
I'm not persuaded, however, that an R4 would be a R subset. It depends what we are referring to as the items in the set. I consider it a set of move capabilities, not a set of potential destination squares. And I consider a range-limited slide a different move capability than an unlimited slide. I certainly don't consider a dabbabahrider a subset of a rook.