Correct answer: Qa6-f1 1.Qa6-f1 ! zugzwang. 1...Bf3-d1 2.Qf1-f8 # 1...Bf3-e2 2.Qf1-f8 # 1...Bf3-h1 2.Qf1-f8 # 1...Bf3-g2
