Correct answer: Qb41.Qa1?? (2.Q:a8#/Qh8#) 1...O-O-O/c3 2.Qa8# 1...Ra7/Ra6/Ra5/Ra4/Ra3/Ra2/Rb8/Rc8/Rd8 2.Qh8# but 1...R:a1! 1.