Blackmar Diemer Gambit Accepted Fork Intermediate Puzzle (Rated 1139): Win Material — Fork Tactic

This middlegame puzzle is a classic example of a tactical fork that wins material by exploiting king safety and piece coordination. White’s active knight jumps into a powerful outpost with check, forcing the black king to move while simultaneously attacking a major piece. The position also features overloaded defenders, pinned pieces, and a trapped rook, so the tactic works because Black cannot defend everything at once. The result is a decisive material gain rather than a quiet positional squeeze.