Challenge: Breaking the General's Gambit: The Red Chariot's Move at File 4, Rank 7 is the Key to Turning the Tide - Can you solve it?

In the double horse exchange formation, the red cannon at file 3, rank 1 is poised to fire. The black chariot at file 7, rank 1 is blocked, while the red horse at file 6, rank 5 is ready to strike. The red chariot's retreat to file 4, rank 7 not only defends but also creates a decisive counterattack opportunity.