Learn How to Win Material: Hanging Piece Refutation
This puzzle comes from a Slav Defense middlegame where king safety and loose pieces decide the game. White has overextended an attacking bishop near the black king, but that piece is not adequately supported. Black can use a forcing tactical refutation to win material and simplify into a clearly better position. The key idea is to recognize when an apparently active attacking piece is actually hanging and can be removed by the king.