Correct answer: Qb11.Rc5[A]? (2.Qb1#[Б]) but 1...B:c5! 1.Qc6+?? 1...Kd3 2.Rc3# but 1...Kf5! 1.Qb1[Б]! (2.Rc5#[A]) 1...Kf5+ 2.Rg2# 1...Kd3
