Queens Indian Defense Fianchetto Variation Puzzle (Rated 1129): Win Material — Discovered Attack
This middlegame puzzle shows how a discovered attack can turn king safety into a decisive material gain. Black’s active bishop creates a forcing check that drags the white king into a vulnerable square, while the queen becomes free to hit a loose target. The key idea is not just the check itself, but the follow-up: once the king is forced to respond, the attacked queen and other hanging pieces become impossible to defend at once. This is a classic tactical refutation based on coordination and tempo.