Mate in two - unrealistic

Here's a mate in two I composed today. I put "unrealistic" in the title so that those of you who only like realistic puzzles could avoid it. As rooperi has been doing, I'll leave it up to you to find the solution. So those of you that don't look at a puzzle unless it has a solution, you can check back later! If nobody gets it (unlikely) I'll be back here in about 24 hours to post the solution.

White to mate in two:

First time making a puzzle, but hopefully I did it right.  Anyway, the answer should be Rh8

That looks right...

Hehe, I hope so, built a whole puzzle around it :-D

You're right, congrats!

I just realized that I didn't need the a1-Bishop; it was a remnant from an earlier incarnation of the puzzle that didn't work. Oh well, at least it doesn't ruin the puzzle!

easy