Correct answer: Ng21.Nh5?? (2.Rf4#) 1...d2 2.Qb1# 1...Bc7 2.Nh:f6# 1...f:e5 2.Q:e5# but 1...Qc7! 1.Ne2?? (2.Rf4#) 1...d:e2/d2 2.Qb1# 1...Qc7