Correct answer: Qb5-c5 1.Qb5-c5 ! zugzwang. 1...f5*e4 2.Qc5-e3 + 2...g6-g5 3.Qe3-b6 # 1...f5-f4 2.Re4*f4 zugzwang. 2...h5-h4
