Correct answer: Kf4-e3 1.Kf4-e3 ! danger: 2.Qh2-h1 # 2.Qh2-f2 # 1...Kf1-e1 2.Qh2-g1 # 2.Qh2-h1 # 2.Qh2-e2 # 1...B