Correct answer: Qf3-e3 1.Qf3-e3 ! zugzwang. 1...a3-a2 2.Qe3-e4 + 2...Kc4-b3 3.Qe4-d3 # 1...b4-b3 2.Qe3-e4 # 1...Kc4-d5
