Challenge: Xiangqi: The Unexpected Rook's Mating Move - The 9th Rank Breaking Strategy - Can you solve it?

When the Black General is trapped on the 6th rank of the 9th file, the Red Rook on the 7th file and 8th rank delivers the 'Rook Retreats to File 8' move, forcing the Black Horse on the 4th file and 8th rank to retreat. The Black Cannon on the 7th file and 2nd rank cannot intervene, making this a classic 'Double Horse Trap'. Discover how Red transforms the board!