Correct answer: Nd41...Kf7 2.Bd5# 1...Kg6 2.Be8# 1.Bg7+?? 1...Kf7 2.Bd5# 1...Kg5 2.Nh4#/Nfe7# but 1...Kg6! 1.Nd4! zz 1...Kf7 2.