Learn How to Spot a Mate in 3: Pillsbury's Mate
This puzzle is a classic mating attack in the middlegame, where active rooks and a bishop coordinate against a weakened king shelter. The key idea is to use forcing checks to drive the king onto a vulnerable square, then exploit the open file and the lack of defenders around the king. Even though Black has a material edge, king safety matters more here: the exposed monarch and loose back-rank resources make the position tactically lost.