Correct answer: Bb31...Ke5 2.Qf6# 1...Kc5 2.Qb6# 1...e3 2.Q:e3# 1.Qf6+?? 1...Kc5 2.Qb6# but 1...Kd3! 1.Qd2+?? 1...Kc5 2.Qd5# but 1...K<