Correct answer: Qf5-g6 1.Qf5-g6 ! zugzwang. 1...Kd4-e5 2.Kd2-e3 zugzwang. 2...Ke5-d5 3.Qg6-e4 # 1...Kd4-d5 2.Kd2-d3 dange
