Albin Countergambit Puzzle (Rated 1139): Win Material — Decisive Middlegame Tactics

This puzzle comes from a sharp Queen's Gambit Declined structure where Black’s pieces are far more active than White’s. The key idea is to use central pressure and king safety to create a decisive material gain, not a mating attack. Black’s knight jump increases tension, and White’s queen becomes vulnerable to tactical harassment. In positions like this, activity often matters more than raw material, especially when the enemy king is still stuck in the center.