Correct answer: Ng4+1...Kf4 2.Qd4# 1.Nd5?? zz 1...Kf5 2.Qf6# but 1...K:d5! 1.Nc4+?? 1...Kd5 2.e4#/Qd6# 1...Kf4 2.Qf6#/Qf2# but 1...K