Jaenisch Counterattack Puzzle (Rated 977): Spot a Fork — Ruy Lopez Tactic

This Ruy Lopez Berlin Defense puzzle shows how a single tactical shot can overturn a material deficit in the middlegame. White’s pieces are active, and the key idea is to exploit the opponent’s loose coordination: one enemy piece is overloaded, another is vulnerable, and the king is still exposed enough to allow a forcing sequence. In classical chess, these moments often decide the game before any endgame is reached.