Russian Game Karklins Martinovsky Variation Puzzle (Rated 934): Fork — Winning Material

This middlegame puzzle is built around a forcing tactical idea: a knight jump that creates a fork against the king and a major piece. The position rewards active piece play and punishes loose coordination, especially when the defender’s king safety is already compromised. White’s pieces are ideally placed to exploit the dark-square weaknesses and the overloaded defenders around Black’s king zone. The key strategic lesson is that tactical motifs often appear when one piece can attack two valuable targets at once.