Learn How to Win Material: Tactical Refutation
This middlegame puzzle is about spotting a tactical refutation when an active rook becomes vulnerable. The key idea is that a seemingly strong piece on an open file can actually be overextended and undefended. Once that piece is taken, the position collapses into a winning material sequence because the defender is overloaded and the follow-up wins even more material. In classical chess, these moments often decide the game immediately.