This is not really a chess puzzle as such, but I heard about this question posed by Sam Loyd and thought the solution was quite funny. You'll have to think a little creatively to solve this.

Devise a position where:

Black is in checkmate

White has only two Rooks, a Knight, and a King

Black has only a King

Black's King is not on the edge of the board

White's King does not assist in the mate

Does the position also have to be legal? If not, I think this works:

You got it! Nice ;)