[fen "6r1/1p3k2/2rb1p1p/3NpP1P/PpPp2pR/1P1K2P1/4RP2/8 b - - 0 1"]
If Black holds his bishop on c5, rook on a8/a5 (if a5 is a threat), rook on g8 (protect g4) or the 8th rank, is there any way for White to break through?
If so, what would be the best defense for Black?
Black to move. He will play Rg5.