Learn How to Spot: Swallowtail Mate
This puzzle is a classic mating pattern in the middlegame: the attacking queen delivers a direct finish while the enemy king has no flight squares and no useful capture or block. The key idea is that the king’s own pieces and weakened pawn shield create a tight mating net. Even when material is balanced or favorable, a single tactical shot can end the game immediately if the king is boxed in and the checking square is protected.