Correct answer: Bh71...f:e2/d:e2 2.Kg6#/Kf6# 1.Nef5+?? 1...B:f5 2.B:f5# but 1...K:e2! 1.B:f3?? (2.Kg6#/Kf6#/Nef5#) 1...B:f3 2.Nef5# 1...