Correct answer: Ng11...Bf3 2.Ne6#/Nf5#/Nc6#/Nb3#/Nb5# 1...Ne6/Nb7 2.Qc6#/Q:e6# 1...Nf7/Nc6 2.Qc6# 1.Qc5?? (2.Qe5#/Qf5#) 1...