Correct answer: Re51...Re7/Rf7/Rg7/Rh7 2.Rb:d5#/Rf:d5# 1...Ne3/Nb6 2.Rf4# 1...Ne7/Nf4/Nb4 2.Rb4#/Rf4# 1...Nf6/Nc3 2.Rb4#
