Correct answer: Nd41...K:a5 2.Bc3# 1...b:a5 2.Be7# 1.Nc3? zz 1...K:a5 2.b4# 1...b:a5 2.Nc2# but 1...K:a3! 1.Nd4! zz 1...K:a5 2.Nc6# 1...b:a5 2.