Queens Gambit Declined Albin Countergambit Mate In 1 Puzzle (Rated 1182): Spot Mate in 1 — Bishop Trap

This middlegame puzzle comes from the Queen's Gambit Declined, where piece activity and king safety outweigh material. White is up a pawn, but the king is stuck in the center and several pieces are poorly coordinated. That creates a classic tactical finish: a bishop-based mating net that exploits open lines, weak squares, and the exposed king. In practical classical chess, these positions reward alertness more than counting material.