Someone spun every pipe on the board, and now nothing connects. Your job is to turn the pieces back. Net Pipe Puzzle unblocked gives you a grid of corners, straights, T-pieces and dead ends, and only one way to fit them into a single network.
Simon Tatham wrote this one himself for his Portable Puzzle Collection. Boards are generated fresh each time, and there is always exactly one solution to find.
How to play Net Pipe Puzzle
Tiles never move from their squares. You can only rotate them. A dark source square sits near the middle, and any pipe that links back to it lights up, so you can watch the network grow as you work.
You win when every tile is part of one connected tree. No pipe may point off the edge of the board, and the network can't contain a closed circuit. If you make a loop, it shows in red. The status bar counts how many tiles are active.
The Type menu has several sizes, each with a wrapping version where pipes that leave one edge come back on the opposite side. Custom boards let you add barriers, fixed walls that act as extra clues.
Controls
| To… | Keyboard | Mouse | Touch |
|---|---|---|---|
| Rotate a tile anticlockwise | Arrow keys to select, then A | Left-click | Tap |
| Rotate a tile clockwise | D | Right-click | Press and hold |
| Rotate a tile by 180 degrees | F | — | — |
| Lock or unlock a tile | S | Middle-click or Shift + click | — |
| Shift a wrapping grid / move the light source | Shift + arrows / Ctrl + arrows | — | — |
| New game, undo, redo | N, U, R | Menu buttons above the grid | Menu buttons above the grid |
Tips
- Work the edges. A piece on the border can't face outward, which often leaves just one or two choices for it.
- Corners are almost free. On a normal board a bend in a corner square can only face one way, and a T-piece never fits there.
- Keep dead ends apart. Two end pieces facing each other would form a closed pair, so one of them has to turn away.
- Lock what you know. A locked tile can't be turned by accident, which keeps big boards tidy.
- Save wrapping for later. With no walls to lean on, you have to reason from the pieces alone, which is a big step up.
Net Pipe Puzzle questions
What does the red highlight mean?
It marks a loop. The finished network must branch like a tree, so any circuit of pipes has to be broken by turning one of its tiles.
How do I rotate tiles on a touchscreen?
Tap a tile to turn it one way and press and hold to turn it the other way. Locking tiles needs a mouse or keyboard, but you don't need it to win.
Is there a hint?
No hint button, but Solve reveals the finished board and Undo steps back as far as you like.
