Correct answer: Nh21.Nd3?? zz 1...K:f1 2.Qf2# but 1...K:g2! 1.Qg3?? zz 1...Kh1 2.Qh2# but 1...K:f1! 1.Nh2! zz 1...Kh1 2.Nf3#