How to Play

The three rules

• Connect each pair of same-colored dots with a line.
• The level is clear once every pair is connected. Empty cells can stay empty.
• Lines cannot cross.

A path is connected when it begins on one endpoint of a color and ends on the other. Order of colors does not matter. A cell holds one color only. Running beside another path is allowed. Landing on its cell is not.

Empty cells are allowed at the end of a level. You do not get a better clear by covering them after the pairs are already joined. You also do not fail for leaving them blank.

Controls on the board

1. Drag from an endpoint, or from a cell already on a path, to extend that color.
2. Undo and Redo move through the changes you have made. Restart clears the board.
3. Hint lights up to three cells of one route, in order, and then is used up for that attempt.
4. Hide time removes the clock from view. Next opens the following level. Share copies a link to this one.

The skin button switches dots and pipes. Dots are round ends and a thinner line. Pipes are square ends and a thicker line, closer to a tube. Either skin follows the same rules, and the choice is stored in this browser rather than in the link.

The clock runs while the level is open, including while you think. Hiding it does not pause it. A clear with fewer moves and less time earns more stars: three if you are well inside the budget for that board size, two if you are close, one if the pairs are simply connected. Replay starts the same level over. Your best stars, time, and moves are kept.

On a phone, drag with one finger. The grid scales to the page, so the board does not sit off to the side. If a 13×13 board feels cramped, the practice size on this page, and the 7×7 pack, keep the endpoints easier to hit.

Rules questions

What are the three rules?

Connect each pair of same-colored dots with a line. The level is clear once every pair is connected, and empty cells can stay empty. Lines cannot cross.

How do I take a line back?

Press a cell on that color's path to retract the end to it, or use Undo. Restart removes every path on the board.

What does a hint show?

The next cells of one working route, in order, up to three cells. It does not draw the path and it does not list the rest of the solution.

Which size should a new player open?

5×5, which is the practice board on this page and the pack linked below. Move to 7×7 when four colors feels short. The rules do not change.