Blackmar Diemer Gambit Accepted Fork Intermediate Puzzle (Rated 997): Win a Fork — Decisive Material Gain

This middlegame puzzle comes from the Blackmar-Diemer Gambit Accepted and shows how active pieces can outweigh static material. White’s pieces are aimed at the king, but the real lesson is tactical: a forcing check can create a fork, overload the defense, and win material by removing key defenders. The position rewards calculation because the best sequence converts activity into a clean material advantage, not a speculative attack.