Zukertort Opening Queen's Gambit Invitation Puzzle (Rated 1275): Win Material — Crushing Middlegame

This puzzle is a classic middlegame example of converting activity into a decisive material gain. Black’s pieces coordinate to exploit loose white pieces, especially around the c-file, where pressure and tactical motifs combine. The key idea is that a seemingly active white setup can collapse when one tactical shot forces simplification and leaves the opponent’s queen and rook coordination vulnerable. In positions like this, the best move is often not the most obvious capture, but the one that starts a forcing sequence.