Correct answer: Nb51...Kb6/Bd7 2.Qc5# 1...Ng8/Nh5/Nh7 2.Rg6# 1.Rg6+?? 1...Kb6 2.Qc5# but 1...Q:h1! 1.Nb5! (2.Qb7#) 1...Kb6 2.