Correct answer: Kb3-a4 1.Kb3-a4 ! zugzwang. 1...b4-b3 2.Rc2-e2 # 1...Nh4-f3 2.Nh2*f3 # 1...Nh4-g2 2.Nh2-f3 # 1...Nh4-g6
