Learn How to Swallowtail Mate: Mate in 1
This puzzle shows a classic mating net built around the enemy king’s weakened shelter. In the middlegame, the key idea is to notice when a queen can land on a square that attacks the king directly while also controlling the escape squares. Even if you are materially ahead, the most important question is whether the opponent’s king has become exposed enough for a forcing finish. Patterns like this often appear when heavy pieces coordinate against a cramped king.