Correct answer: Na51...Qg8/Qh7/Qf6 2.Bf6# 1...c6/c5 2.Bd6# 1.Nc5?? (2.Nd3#/Nd7#) but 1...Q:e7! 1.Qb6?? (2.Qd4#/Q:c7#) 1...c:b6 2.Bd6# 1