French Defense Advance Variation Puzzle (Rated 870): Win Material — Skewer

This middlegame position features a classic tactical refutation based on a skewer and overloaded defenders. Black’s bishops are exposed, while the king remains in the center and cannot easily respond to a forcing check. White’s active bishops and strong piece coordination turn the king’s vulnerability into a decisive material gain. The key idea is to exploit the relationship between the king and a loose piece behind it, then collect the second target once the king moves.