Correct answer: Bc81...Nce8/Nb5 2.Rb5# 1...Nf5 2.Qe5# 1...Nge8 2.Qd4# 1.Qf8?? (2.Qc5#) 1...Nce6/Na6 2.Qd6# but 1...Nge6! 1.Rb5+??
