Correct answer: Ka71...Nc8 2.b:c8N# 1...Nd7+ 2.e:d7# 1.Ka7! zz 1...Kc7/N:a4 2.b8Q# 1...Nc4/Nd5/Nd7 2.b8Q#/b8B# 1...Nc8+ 2.b:c8Q<