Test Yourself 3

Or when the pieces are stuck.
White to play and mate in 5.

1.Bg5+ avoiding the first mine-[1.f8Q g5!= (1...f5+? 2.Kf4 g5+ 3.Bxg5+ Kh5 4.Qe8+ g6 5.Qe2#) ] 1...fxg5 2.f8R! and now the second-[2.f8Q Qg8 3.Qxg8-stalemate!] 2...Qg8 3.Rxg8 Kh7 4.Rf8 Kh6 5.Rh8# 1–0 Pogosiants