Caro Kann Defense Advance Variation Puzzle (Rated 918): Discover — Win Queen

The discovered attack is one of chess's most lethal tactics: a piece moves aside to unleash an attack from a piece behind it. Here, Black's advanced knight appears pinned by White's pieces, yet it strikes with check, forcing White to respond while opening a line for Black's queen against White's queen. White cannot parry the check and defend the queen simultaneously, so Black converts a static middlegame edge into a decisive material gain.