Correct answer: Ra41...Kd8 2.Qd7# 1...Kf8 2.Qf7# 1.Nf7?? (2.Q:e7#) but 1...Kf8! 1.Ng6?? (2.Q:e7#) but 1...Kd8! 1.Nd7?? (2.Q:e7#) but 1...K