Sacrifice Puzzle (Rated 1366): Spot Mate in 2 — Back Rank Mate

This puzzle is a classic middlegame tactical finish where king safety outweighs material. The attacking side uses a forcing check to drag the enemy king onto a vulnerable square, then finishes with a rook-based mating net. The key idea is that the defender’s pieces and king are overloaded, so even a seemingly active position can collapse instantly. In classical chess, these patterns often appear when the back rank is weak and the king has limited escape squares.