Learn How to Spot a Mate in 1: Queen's Gambit Declined
This puzzle comes from the Queen's Gambit Declined, Tarrasch Defense, and it shows how quickly king safety can collapse in the opening. Black’s pieces are coordinated around the white king, and the key lesson is to always scan for forcing checks when the enemy king is exposed in the center. Even in a classical chess structure, a single tactical oversight can turn a normal middlegame into an immediate checkmate.