Correct answer: h2-h3 1.h2-h3 ! zugzwang. 1...g5-g4 2.h3*g4 # 1...g5*h4 + 2.Kg3-f4 zugzwang. 2...g6-g5 + 3.Kf4-f5 zugzwang. 3...g5-g
