Thread: the one-line path puzzle
Thread: draw a single line that goes through every cell, connecting the numbers in order. A quick path puzzle in the spirit of Zip.
Play ThreadFree, zero ads, no sign-up, on mobile and desktop.
How to play
Draw a single line from 1: it goes through every cell (up, down, left, right) and through the numbers in order, never crossing a wall.
Example
A single line goes through every cell, joining the numbers in order: 1, 2, 3…
Tips to get better
- Corners and dead-end cells (only one free neighbour) force the line: fill them first.
- Between two consecutive numbers, count the cells to cover: the line sometimes has to detour to fill a pocket.
- If you're stuck, pull the line back to the last number rather than erasing everything.
What this game trains
- Planning and strategy: think several moves ahead and organise your actions.
- Logical reasoning: deduce the solution from the rules, without guessing.
Levels
Easy · Hard · Expert · Hardcore — each level has its own leaderboard.
Challenge your friends
At the end of a game, send your score as a link: your friend plays exactly the same game and you compare your times. There is also a daily challenge and tournaments.