Correct answer: Kf21...f4 2.Qe4# 1...Ng6/Nh7/Nd7 2.Nd7# 1...Nd3/Ne2/Nb3/Na2 2.N:d3# 1...d5 2.Q:c7# 1.Qc6?? zz 1...f4 2.Qe4# 1...Ng6
