Learn How to Corner Mate: Checkmate in 1
This puzzle is a classic checkmate in 1 based on a corner mate pattern. The key idea is that the enemy king is boxed in by its own pieces and the board geometry leaves only one tactical finish. In positions like this, material is irrelevant: the only question is whether the mating square is covered and whether every escape route is sealed. These are the kinds of tactical refutations that appear in classical chess and sharp middlegame puzzles.