Correct answer: Qd31...f4 2.Rh5# 1...Nc3+/Nd2 2.Q:c3# 1.h5?? zz 1...Nc3+/Nd2 2.Q:c3# but 1...f4! 1.Ka1?? zz 1...Nc3/Nd2 2.Q:c3# 1...f4 2.R