Learn How to Win Material: Trapped Piece
This puzzle comes from the Nimzowitsch Defense and shows a classic opening trap where a seemingly active piece becomes tactically overextended. White can exploit the loose queenside and the pin on the knight to force a sequence that wins material. The key idea is not a direct king attack, but a tactical refutation based on pressure against undefended pieces, discovered threats, and the fact that one defender is overloaded. In classical chess, these motifs often decide the game before the middlegame fully begins.