Correct answer: Ne71...a3 2.c4# 1.Nd4?? (2.Nf5#/R:f3#) but 1...c:d4! 1.Ne7! (2.Nf5#) 1...Nf2+/Nf6+/Ng3+/Ng5+/Nd2+ 2.Nd5# 1...N:c3+ 2.Nc6#
