Correct answer: Rd81...Q:b2 2.R:b2# 1.Rd6?? (2.R2d4#/R2d5#) 1...Qb6+/Qa7+ 2.R2d4# 1...Qb5 2.R2d5# 1...Q:b2 2.R:b2# but 1...Qd8! 1.
