When I say "forward half of the Knight", this means that a White Forfnifurlrurking can go from e4 to d6 f6 c5 or g5, but *not* from e4 to c3 d2 g3 nor f2 -- those moves are somewhat more backwards than forwards, you see.
Here is a complete example of its power: from e4, a White Forfnifurlrurking can go to f3, e3, d3, f5, or d5, or d6, f6, c5, or g5, or
It seems as though the Forfnifurlrurking really is as strong as the FIDE Queen, not much more, not much less.
A word of advice to the Forfnifurlrurking's opponent: the best defense is to get behind it!
In front of the Forfnifurlrurking
is no place for an unsheltered King to be lurking.
Excuse me I have to go answer the telephone.
Okay I'm back. Sorry to say, my poetic license has been revoked.
The Forfnifurlrurking can look very frightening when it advances against your King, but if you find a bit of shelter and run around behind it, you'll find safety in most cases.