Correct answer: Qh5-d1 1.Qh5-d1 ! zugzwang. 1...Kd4-e4 2.Qd1-g4 # 1...Kd4-c4 2.Qd1-a4 # 1...c5-c4 2.Qd1-g1 + 2...Kd4-e4
