Correct answer: Qc71...Ng4 2.Nf6#/Nc3# 1...Ne4 2.Nf4#/Q:f1# 1.Qf5+?? 1...Ne4 2.Ne7#/Nf4#/Nf6#/Nc7#/Nb6#/Q:f1# but 1...B:f5! 1.
