Curtain is a unique board mechanic designed to add an extra challenge and diversify gameplay. Unlike regular columns, this column is initially covered by a "curtain," hiding the stack of cubes beneath it. To remove the curtain and access the cubes, you must complete a specific stack of the required color elsewhere on the board.
The height of Curtain is dynamic and always matches the height of the covered cube stack — it can never be shorter than the stack itself. This means that as you play, the curtain remains in place until you fulfill the unlocking condition.
To succeed in levels featuring Curtain, plan your moves carefully. Prioritizing the required color stack will allow you to remove the curtain earlier, giving you more flexibility to manage the remaining blocks and complete the level efficiently.