Correct answer: Rf51.Bd7?? (2.Qe8#) but 1...K:d7! 1.Rf2?? (2.Rd2#) but 1...f5! 1.Rf3?? (2.Rd3#) but 1...f5! 1.Rf4?? (2.Rd4#) but 1...f5! 1.Rg1?? (2.R