Learn How to Win Material: Discovered Attack
This middlegame puzzle from the Catalan Opening shows how a quiet-looking position can hide a tactical shot based on a discovered attack. One piece is pinned and overloaded, so a single exchange can uncover pressure on a more valuable target behind it. The key idea is not a mating net, but a decisive material gain that shifts the balance immediately. In classical chess, these tactical motifs often decide games when development and piece coordination are uneven.