Nimzo Larsen Attack Classical Variation Puzzle (Rated 1088): Win with a Fork — Trapped Piece

This puzzle comes from the Nimzo-Larsen Attack and shows how a forcing tactical sequence can turn an opening advantage into a winning material net. The key idea is that active piece placement can create multiple threats at once, especially when an enemy piece is overextended or a back-rank defender is loose. In classical chess, these positions often reward precise calculation over general development, because one tactical blow can expose a trapped piece and collapse coordination.