Ruy Lopez Marshall Attack Puzzle (Rated 1194): Win Material — Discovered Attack
This middlegame puzzle is a classic example of a discovered attack combined with kingside pressure. White’s active bishop and knight coordinate to create a forcing tactical sequence against the black king’s shelter. The key idea is that one piece can be sacrificed or exchanged to open lines, while another piece attacks a more valuable target. When the king is exposed and the queen is overloaded, tactical refutation often comes from forcing checks and winning material.