Correct answer: N:b81...Kf4 2.Bh2# 1...Kd4 2.f4# 1...Kd6 2.Nf7# 1.Ke7?? zz 1...Kf4 2.Bh2# 1...Kd4 2.f4# but 1...Ba7! 1.Nf7+?? 1...Kf4 2
