Can't see any quick mate. I only see Bxg4 as the best move, then Bf3>>Qh1# mate.
This is a hard one.
whoa
easy - 1...Rxb2 2.f3 Qh2#
I don't care it is illegal and stupid :)
Wonder how many of us will sit and ponder this, only to find it isn't mate in 2.