Level Standard Hard Expert New puzzle Restart Undo
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THE ESSENTIALS How to play Every pipe has two ends. Join both ends to reciprocal neighbouring pipe ends without crossing the board boundary. All squares must belong to the same single closed loop. Several disconnected closed loops are not a solution. Pieces rotate in place; they do not move between squares or change from corners to straights. Every scrambled board comes from a constructed full-board loop, so a rotation-only solution exists. A unique solution or minimum rotation count is not promised. Controls Select a pipe to rotate it clockwise. Hold Shift while clicking or activating a pipe with Enter or Space to rotate counterclockwise. Arrow keys move focus between pipe squares; Tab also reaches each button. Undo reverses one accepted rotation. Restart restores the same scrambled orientations; New puzzle or a difficulty change constructs another scramble. Good to know The rotation counter describes the current sequence of actions, not the number of pieces still wrong.
A connection must work from both sides. An end pointing toward a neighbour whose pipe points elsewhere is still open.
These pipe-connection rules are a familiar puzzle mechanic, independently implemented without an outside game embed.