Correct answer: Rg81...B:b7+ 2.a:b7# 1.Qb8+?? 1...N:b8 2.Rc4# but 1...Q:b8+! 1.Rg8! (2.N:b6#) 1...Be6 2.Rc7# 1...B:g8 2.Rb8# 1...B:b7+
