What is a tube in this game?

The line you draw between two ends of the same color. It is not a rotatable tile and it does not carry a stream. When the line touches both ends, that tube is done.

How do I turn on the pipe look?

Use the skin button above the board. Pipes uses square ends and a thicker line. Dots uses round ends. The choice stays in this browser.

Do tubes have to be straight?

No. A tube may turn on any empty cell, as long as each step is up, down, left, or right and no other color owns the cell.

Does the 7×7 pack use the same rules?

Yes. More colors, same clear: every pair joined, no crossing, empty cells allowed. The full 7×7 list is on its own page.

Connect the Tubes Game

Connect the tubes describes the picture: two openings of one color, and a tube you draw between them. In PipeTrio the tube is a continuous line. You are not given elbow pieces, and you do not rotate a tile until the openings line up.

If round dots do not look like tube ends, switch the skin to pipes. The ends become square, the line gets thicker, and the cells take on a darker board tone. It is the same puzzle. The skin is saved in this browser and is not part of the address, so a shared link does not force a look.

This page starts on a 7×7 board, with 5 or 6 colors. That is enough tubes on screen to make the pipe skin useful, and still small enough to finish in one sitting.

7x7-0001

7×7 · 6 colors · difficulty 2★

0:00Moves 0

7×7 tube levels

6 colors · ★★

6 colors · ★★★

6 colors · ★★

6 colors · ★★

6 colors · ★

6 colors · ★★

5 colors · ★

6 colors · ★★★

6 colors · ★★★★★

6 colors · ★★★★★

6 colors · ★★★

6 colors · ★★★★

6 colors · ★★★★★

6 colors · ★

6 colors · ★★★★★

6 colors · ★★

5 colors · ★★★

6 colors · ★★★

6 colors · ★★★★

6 colors · ★★★

6 colors · ★★★

5 colors · ★★★★★

6 colors · ★★

6 colors · ★★★

6 colors · ★★★★

6 colors · ★★★★★

6 colors · ★★★★★

6 colors · ★★★

6 colors · ★

6 colors · ★★

What the tubes are allowed to do

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.

Each tube joins one pair of openings. It can bend at any cell. It cannot share a cell with another tube, and it cannot cross one. Empty cells can remain after every pair is joined.

Follow one color from end to end. The thicker pipe skin makes a turn easier to see, and the square ends read more like openings. Hue is not the only cue: end shape and line weight change with the skin, which helps when two colors are close for you.

How to connect the tubes

Press an opening and drag to its match, stepping only to a side neighbor.
Switch the skin to pipes if you want square ends and a thicker tube.
Retract by pressing a cell that already belongs to that tube.
Leave a finished tube alone and start the next color at one of its openings.

A finished tube whose two openings are already joined will not extend further. If you need those cells back, retract or undo before you start a different color. Hint marks the next three cells of one route and does not draw the tube for you.

Tube questions

What is a tube in this game?: The line you draw between two ends of the same color. It is not a rotatable tile and it does not carry a stream. When the line touches both ends, that tube is done.
How do I turn on the pipe look?: Use the skin button above the board. Pipes uses square ends and a thicker line. Dots uses round ends. The choice stays in this browser.
Do tubes have to be straight?: No. A tube may turn on any empty cell, as long as each step is up, down, left, or right and no other color owns the cell.
Does the 7×7 pack use the same rules?: Yes. More colors, same clear: every pair joined, no crossing, empty cells allowed. The full 7×7 list is on its own page.