Correct answer: Qd51...Nf8 2.Re7# 1.Qa4?? zz 1...K:d8 2.Q:d7# but 1...Kf8! 1.Qa7?? zz 1...K:d8 2.Q:d7# 1...Ne5/Nc5/Nb6/Nb8 2.Q