Slitherlink
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How to play and about the game
How to play
- Each number counts the drawn lines around its cell.
- The loop is one closed line with no branch and no loose end.
- Mark an edge with × when you know it stays empty. Marks do not count as mistakes.
Controls
Tap an edge to draw a line, tap it again to remove it. Switch to Exclude × to mark edges. Keyboard: Tab, Enter, X switches tool, H hint, U undo.
About this game
A 30-level campaign from 5×5 to 10×10, plus a daily puzzle. Each board has one solution, and a wrong line is never drawn.
- 5–10 min
- Single player
- Levels
- 30, 5×5 to 10×10
- Solution
- Unique, solver-checked
- Help
- Hint, undo
Strategy and tips
Four steps from your first game of Slitherlink to expert play.
- First game
Start at the corners of the grid: a 0 rules out all four sides, and a 3 in a corner leaves only one open edge.
- Getting better
Where a 0 and a 3 share a side, that side stays empty, so the 3 must take its other three sides.
- Confident
Every dot on the loop has exactly two lines. When a dot already has two, the other edges of that dot stay empty.
- Expert
Count each clue against its cell. If the lines already drawn equal the clue, the other sides stay empty; if drawn lines plus open sides equal it, every open side must be drawn.
Common mistake Drawing an edge because a number seems to want it. Such a line is an error, not a hint.
