Blackmar Diemer Gambit Declined Discovered Attack Intermediate Puzzle (Rated 1750): Use Discovered Attack — Decisive Material Gain

This middlegame puzzle shows how a forcing queen move can set up a discovered attack and win material by exploiting king safety. White’s active knight and queen coordinate against the black king, while Black’s pieces are overloaded and vulnerable to tactical shots on the c-file and kingside. The key idea is to use checks to drag the king into a worse square, then unleash a knight jump that opens lines and creates a decisive gain. The position rewards calculation over slow maneuvering.