Clarification: Black to move and get mated on White's second move.
Selfmates and Helpmates

The first and second black moves can be flipped around for each of the two solutions shown. This means that there are four solutions!
The setup of the helpmate problem is wrong, for instance because black could play 2. ..Rh2 as well as 2. ...Rh1. More likely the original composition diagram is something like this:

Here's a real fanciful helpmate that I know of. Have fun with it!
Arpad Molnar & Tamas Legendi, 2828 Magyar Sakkelet 05/1961, 2. ehrende Erwähnung
Helpmate In 7 Moves
@RewanDemontay: Beauty! A white AUW is pretty special in a helpmate considering that both sides cooperate to make the checkmate happen. I suppose black AUWs are more common.

Yes, there are several out there, and you can see a good chunk of them all here-http://superproblem.ru/archive/S_record-H.htmlhttp://superproblem.ru/archive/S_record-H.html
However, to my knowledge, this is the only such White AUW in existence!!!
I started this to have a collection of selfmates and helpmates. Post any you find interesting here. I'll provide one to start off.
Black to move and helpmate in 2. I remember this puzzle had 2 solutions, but don't remember the exact setup, so I've worked out the piece positions from what I remember and am therefore giving only 1 solution.