Corner Mate Beginner Puzzle (Rated 980): Spot a Corner Mate — Mate in 1

This puzzle comes from the Caro-Kann Defense and shows a classic middlegame mating net where the enemy king is stuck in the center and the final blow lands with a knight on a powerful outpost. The key idea is that a well-placed piece can combine king safety, control of escape squares, and tactical pressure on loose defenders. In positions like this, material count matters less than the immediate threat of checkmate.