Correct answer: Qc6+1...Qc1+/Qc5+/Qc6+/Qc7+ 2.Bc7# 1...Q:c8 2.Bd8# 1...Qb2/Qe2/Qf2/Qh2/Qd3/Qg6/Qb1 2.Bc7#/Bd8#/Qb7# 1...Q<