Correct answer: Rb21.Kf4?? zz 1...g3 2.R:g3# but 1...Kd3! 1.Rc1?? (2.Re7#) but 1...Ke3! 1.Rc3?? (2.Rg6#/Rg5#/R:g4#/Rg8#/Rf7#/Re7#/Rd7
