Learn How to Win Material: Hanging Piece Refutation
This puzzle comes from the Four Knights Game and shows a classic opening tactic based on hanging pieces and tactical refutation. White has overextended a knight and bishop into the center, but Black can immediately challenge the loose pieces with forcing moves. The key idea is that in the opening, active piece placement matters only if the pieces are defended. When a central piece is undefended, a simple capture can win material and collapse the position.