The 'Black Rook File 1' formation with the Black Horse on File 5, Rank 9 creates strong pressure. The Red Cannon on File 7, Rank 1 must decide immediately when the Red Pawn on File 9, Rank 4 advances. The Black Rook is ready to thrust into the Red General, creating opportunities for the Black Advisors on Files 4 and 6 to coordinate their attack. Difficulty: Intermediate.