Queens Gambit Declined Discovered Attack Intermediate Puzzle (Rated 968): Spot a Discovered Attack — Mate in 2

This middlegame puzzle shows how a discovered attack can turn a normal-looking position into a forced mating net. White’s pieces coordinate against the kingside, and the key idea is to move one attacker with tempo so another piece suddenly opens a direct line to the enemy king. The position also highlights overloaded defenders: one piece is trying to protect too many important squares at once, which makes the tactical refutation possible.