Learn How to Spot Back Rank Mate: Mate in 2
This middlegame puzzle is a classic back rank mate pattern: the enemy king is boxed in by its own pawns, while your queen can invade with forcing checks. The key idea is that the king has no useful flight squares, so a direct check can drive it onto the back rank and finish the attack immediately. Even when material is down, tactical threats against the king can override static evaluation and decide the game at once.