Correct answer: Ne21.Ne6?? zz 1...K:e6 2.Ng5# 1...K:c6 2.Nfd4# 1...d:c6 2.N:f4#/Nc7# but 1...d:e6! 1.Nf5?? zz 1...Ke6 2.Ng5# 1...K:c6 2.N<