Barnes Opening Puzzle (Rated 1435): Win Material — Decisive Queen Sacrifice

This middlegame puzzle shows a classic tactical idea: using a forcing queen sacrifice to drag the enemy king into the open and then win material with tempo. Black’s attack works because White’s king is exposed, key defenders are overloaded, and the white pieces are poorly coordinated. The combination is not about a flashy checkmate; it is about a long forcing sequence that converts king safety problems into a decisive material gain.