Correct answer: N:e61...d:c6 2.Q:e6# 1.K:d7?? (2.Q:e6#) but 1...Kg8! 1.Bd6?? zz 1...d:c6 2.Q:e6# but 1...Kg8! 1.B:d7?? (2.Q:e6#/B:e6#) but 1...Kg8!