Correct answer: Qf1-f4 1.Qf1-f4 ! zugzwang. 1...c4-c3 2.Qf4-a4 # 2.Qf4-b4 # 1...Kb3-c3 2.Qf4-e3 # 1...h4-h3 2.Qf4-g3 +
