Nimzo Indian Defense Three Knights Variation Beginner Puzzle (Rated 1451): Win Material — Trapped Piece

This puzzle comes from a Nimzo-Indian Defense middlegame where tactical awareness outweighs routine development. White can exploit a loose bishop and the alignment of pieces to win material by forcing a sequence that clears the way for a decisive capture. The key idea is not a flashy mating attack, but a clean tactical refutation that turns a temporary piece sacrifice into a long-term material gain. In classical chess, these moments often decide the game immediately.