Learn How to Win Material: Trapped Piece
This middlegame puzzle is a classic example of a trapped piece tactic where one side can force a decisive material gain by exploiting alignment on the back rank and the a-file. The key idea is to notice that a powerful piece is overloaded and can be lured into a sequence where it becomes vulnerable to capture. In practical classical chess, these tactical motifs often appear when a queen or rook is placed on a square that looks active but is actually tactically loose.