Queen's Indian Discovered Attack Chess Puzzles

The Queen's Indian Discovered Attack is a tactical motif that appears in Queen's Indian Defense structures when a piece moves away to reveal an attack by a rook, bishop, or queen on a more valuable target. It often happens after a key piece on the c-file, d-file, or a diagonal steps aside, exposing the enemy king, queen, or a pinned piece. For an intermediate player, the defining feature is the hidden line becoming active the moment the blocking piece moves.