Correct answer: f51...N:e6/Nf7/Nb7 2.Qb7#/Qc6# 1...Nc6 2.Q:c6# 1...d:c5 2.Qd7# 1...Nd1/Nd3/Na4 2.Q:c4# 1.Ke3?? zz 1...d:c5 2.Qd7# 1
