Correct answer: Na71...K:c8 2.Bc6#/Bb5#/Ba4# 1.Qd6+?? 1...K:c8 2.Qc7# but 1...N:d6! 1.Na7! (2.Bd7#) 1...Nb7 2.N5c6# 1...Bf7 2.B