Petrovs Defense Karklins Martinovsky Variation Puzzle (Rated 1567): Win Material — Discovered Attack
This Petrov’s Defense puzzle is a classic middlegame tactical refutation where activity beats material. White’s king safety is shaky, the queen is exposed, and Black’s queen and bishop coordination creates immediate pressure on key squares. The position features a pin, a hanging piece, and a discovered attack idea that forces White to respond accurately. The winning side must notice that the opponent’s last move has created a tactical vulnerability, allowing a forcing sequence that turns defense into a decisive material gain.