Learn How to Spot Mate in 2: Pillsbury's Mate
This puzzle is a classic mating net built around heavy-piece coordination and king safety. The attacking side uses the open e-file to force the enemy king into a helpless position, where every defense fails because the back rank is overloaded and the king has no flight squares. In middlegame positions like this, look for checks first, then examine whether a capture or recapture can keep the attack alive. The key idea is that material becomes irrelevant when the king is boxed in.