Correct answer: Q:a71...O-O-O 2.Qc3#/Qc1#/Qc5# 1...Rb8 2.R:b8# 1.Qa3?? (2.Qe7#) 1...O-O-O 2.Qc3#/Qc1#/Qc5# but 1...Kd8! 1.Qh3?? (2.Qh8#)
