Correct answer: Ndf51.Rh5+?? 1...Ke4 2.Qf3# 1...Kc4 2.Bf1#/Qc3# but 1...f5! 1.Qf3+?? 1...Ke5 2.Ng4#/Nf7#/Ne2#/Ne6#/Nc2#/Nc6#/N<