Correct answer: Rg71...f4 2.Qe4# 1.Rg8?? (2.Qh1#) 1...Rc8 2.B:c8# 1...f4 2.Qe4# but 1...R:g8! 1.Qb3?? (2.Qf3#) but 1...Rc8! 1.Rg7! (2.Qh1