Correct answer: Qa81...Qb3+ 2.Rd:b3# 1...Qb4 2.Rd4# 1...Qb6 2.Rd6# 1...Qb7 2.Rd5# 1...Q:b8 2.Rd8# 1...Qe1 2.Re3# 1...Qg1 2.Rg3# 1...Q