Learn How to Win Material: Tactical Refutation
This middlegame puzzle comes from the Queen's Gambit Declined, Tarrasch Defense, where active piece play outweighs static material. White has extra material, but the position is tactically unstable: the king is exposed, pieces are loose, and one forcing check creates immediate problems. The key idea is to use tempo and coordination to turn activity into a decisive material gain, rather than allowing the opponent to consolidate. In classical chess, these are the moments where calculation matters most.