Correct answer: Qb8-d6 1.Qb8-d6 ! danger: 2.Qd6-f8 # 2.Qd6-f6 # 1...Qb5-c4 2.Qd6-e5 # 2.Qd6-f6 # 1...Qb5*e8 2.Qd