Correct answer: N:d41...Ng4+ 2.Q:g4# 1...Ng8/Nf7 2.Qg4#/Q:f5# 1...Rf6/Rf7/Rf8 2.e3#/Qg3# 1...R:e5/Be4 2.Qg3# 1...B:f3 2.Q:f3# 1.R