Netwalk: Free Online Network Puzzle

A network puzzle you can solve by reasoning

Every Netwalk board begins as one complete network. The tiles are then rotated, breaking the connections between the server and the other nodes. Your task is to turn the tiles back into a connected system. Cyan pipes show the part of the network that currently reaches the server, so each move gives you useful feedback instead of asking you to guess.

Boards are constructed from a connected solution and then scrambled. Development tests check generated examples; the game does not independently validate every new board or certify a unique solution. Restoring the constructed orientation is the intended solution when that construction step succeeded. A contradiction on the board is a reason to undo, not proof that some other orientation was certified. Begin with a small grid to learn the tile shapes, then increase the board size when you want more constraints to keep in mind.

How a round works

1. Look at the corners and edges first. A pipe cannot lead off the board in the standard mode.
2. Use the server glow to inspect current connectivity; confirm each move with matching openings and boundary constraints.
3. When a route creates a dead end or isolates a group of tiles, rotate the last uncertain piece and test the alternative.

There is no time limit. You can use undo to test an idea, reset a board whenever you want, or work through the same Daily Challenge as other players. The game also supports custom board sizes, so a quick five-minute warm-up and a longer logic session use the same clear rules.

Learn the system, then choose your challenge

Netwalk is built around the rules of graph connectivity: every active node needs a path to the server, and every opening must match its neighbor. Bounded and Torus forbid loops; Classic permits them. The guides below explain those ideas in practical terms, including why certain corner moves are forced and how to scan a larger board without losing track of the network.

• Interactive tutorialSolve three small examples with hints, Undo, and matching-opening feedback.
• Build a solving routineBuild a repeatable process for small and medium boards.
• The mathematics behind NetwalkSee how spanning trees and graph rules shape each puzzle.
• How the site is maintainedRead the game method, accessibility approach, and guide standards.

Three modes, one completion test

Bounded play uses solid outer walls and a server in the center. A finished board connects every tile to that server and contains no loop. Torus keeps the center server and the ban on loops, but opposite edges are neighbors: a pipe can leave the top and return on the bottom. Classic keeps the walls, allows loops, and may lock a tile so you cannot rotate it. Locked tiles are clues in Classic only.

Cyan marks tiles that currently reach the server. It is live feedback, not a stamp that the tile is finished. In Bounded and Torus a cycle is shown in red and blocks completion. An opening that faces a wall or a closed neighbor also blocks completion, even when many tiles are already lit. The FAQ states these rules in the same words as the game, and the Chinese guide explains them again for readers who want that version.

English and Chinese

The maintained play pages are English and Chinese. Both load the same board generator. The Chinese page and the Chinese guide are written in Chinese. They are not a short list of links pointing at the English articles. Longer strategy articles on the blog stay in English, and the three interactive lessons are in English too.

Older German, French, Spanish, Japanese, Russian, and Korean addresses permanently redirect to the English game. They are not separate translations, and they are not listed for indexing. Use the two choices above, then open Daily, the tutorial, or the contact page if a board and a guide disagree.