Correct answer: Rg6-h6 1.Rg6-h6 ! zugzwang. 1...e3*f2 2.Rg5-f5 zugzwang. 2...g4-g3 3.h2*g3 # 1...g4-g3 2.h2*g3 # 1...f6-f5 2.f2-f4 zug
