Challenge: Breaking the 'Red Pawn' Formation: 'Leading with a Secret Pawn and a Rook Thrust – The Secret Palace' - Can you solve it?

This chess position is not a simple battle. The red pawn is positioned at the last rank like an iron wall, but their rook is pushing forward with ferocity. Black only has two advisors and one general to counter this invasion. Can you guess which tactic will decide the victory in just a few moves?