Correct answer: Nc31...Ke5 2.Nf5# 1.Q:f6+?? 1...e5 2.Nf5# 1...Ne5 2.Bg1#/Rd1#/Rd3#/Qf2# but 1...B:f6! 1.Rd3+?? 1...Ke5 2.Nh1#/N