pull down to refresh

I'm excited to see the solution. I have no clue myself!
this territory is moderated
c7, Rd6+, Kb5, Rd5+, Kb4, Rd4+, Kb3, Rd3+, Kc2, Rd4, c8=Rc8, Ra4, Kb3, Rg4, Rc1#
Gotta promote to rook in order to prevent stalemate with Rc4+
reply