Learn How to Win Material: Tactical Refutation
This puzzle comes from the Borg Defense and shows how a long opening can turn into a tactical refutation when one side’s king safety is loose and key pieces are overloaded. White has active development, but Black’s queen invasion creates immediate pressure on the queenside and exposes a tactical sequence based on hanging pieces and discovered attacks. The lesson is that in classical chess, activity can outweigh static material only if the tactical details are sound.