Correct answer: Ne21...b:c5 2.Bc4# 1...d6 2.Bc6# 1.Nc6?? (2.Ne7#) 1...Bh4 2.Nb4# 1...d:c6 2.Bc4# but 1...Qd8! 1.Ne2! (2.Nf4#) 1...c6 2.Bc4#
