Learn How to Win Material: Discovered Attack
This puzzle comes from the Queen's Gambit Declined and shows a classic discovered attack idea in a middlegame setting. White’s queen is deeply active and the position is tactically loaded, but Black has a forcing resource that uses check to gain time and expose key targets. The lesson is that in classical chess, active pieces and loose back-rank coordination can outweigh raw material if a forcing sequence wins the queen or simplifies into a favorable ending.