Triangle Mate Puzzle (Rated 1113): Triangle Mate — Mate in 2

This puzzle is a classic chess endgame-style mating net even though it appears in a middlegame setting. White’s pieces coordinate to restrict the enemy king, using forcing checks and a tight geometry that leaves the defender with no useful squares. The key idea is not material gain but king safety: once the first forcing move lands, the king is driven into a corridor where the final attack becomes unavoidable. Patterns like this often resemble triangle mate, back rank mate, or other short forced mates.