Correct answer: Rd7-d5 1.Rd7-d5 ! danger: 2.Qe8-d7 # 1...Re4-f4 + 2.Ng2*f4 # 1...c6*d5 2.Qe8-c8 # 1...f7-f5 2.Qe8-g8 # 1.