Correct answer: Bg31...Qb1/Qg3 2.Q:b1# 1...Qd3 2.e:d3# 1...Qf3 2.e:f3# 1.Qb1+?? 1...Qd1 2.Bd2#/R:d1#/Q:d1# but 1...Q:b1! 1.Bg3! (2.f3#) 1...
