LinkedIn Zip
Draw a path that visits every cell and hits the numbers in order.
Tap or drag from checkpoint 1 to extend the path. Tap a path cell to truncate back. Walls block the line — find the only route that reaches every cell.
About LinkedIn Zip
LinkedIn Zip is a single-stroke path puzzle. You're given an N×N grid with a handful of numbered checkpoints scattered across it. The goal: draw one continuous, non-self-crossing path that visits every cell exactly once and passes through the checkpoints in numerical order.
Each puzzle ships with a hand-picked set of walls between cells — they exist purely to force exactly one valid path, so every puzzle has a single correct solution. On Ludingo we generate 1000 puzzles per difficulty, deterministically seeded so a shared URL opens the same board for everyone.
How to play
- Tap (or click) the cell marked 1 to start the path.
- Extend by tapping an adjacent empty cell — or hold and drag along the cells you want to add.
- The path must visit every cell exactly once and hit checkpoints 1 → 2 → 3 → … in order.
- Walls between cells block the path. Tap a cell already on your route to truncate back to it.
How to solve Zip — strategy and techniques
Anchor the endpoints first. The path starts at 1 and ends at the highest checkpoint, so sketch the corridor between consecutive checkpoints in your head before drawing — a wrong first segment is the most common reason a Zip attempt collapses.
Corners and edges dictate the route. A corner cell has only two neighbours, so the path must enter and leave through exactly those; an edge cell has three. Any cell left with a single free neighbour becomes a dead end — plan so such cells are consumed on the way, not stranded.
Walls are hints in disguise. They exist to force the unique solution, so a wall usually marks exactly where a tempting shortcut would have been. When you see one, assume the intended route goes the long way around it.
Watch for sealed pockets. Every cell between checkpoint k and k+1 must be covered by some segment of the path — if a group of cells would be cut off after you pass, the route is wrong. Tap an earlier cell of your route to truncate back instead of restarting.
Tips for faster solves
- Read the corners first — each one has exactly two ways through.
- Never leave a pocket of cells the path can no longer reach; back up early.
- Treat every wall as a signpost: the intended route goes around it.
- Drag to paint long straight runs quickly; tap for precise single-cell moves.
Questions about LinkedIn Zip
What are the rules of Zip?
Draw a single continuous path that visits every cell of the grid exactly once and passes through the numbered checkpoints in order (1, then 2, then 3, and so on). Walls between cells are impassable — they enforce a unique solution.
Does every puzzle have one solution?
Yes. The generator places walls until only one valid path remains. If you find a route that visits every cell and hits the numbers in order without crossing a wall, it's the one true solution.
How does difficulty work?
Easy is 5×5 with 4 checkpoints. Medium is 6×6 with 5 checkpoints. Hard keeps the 6×6 grid but adds 7 checkpoints, so you have to thread a more constrained order through the same space.
How does sharing a puzzle work?
Every puzzle has a stable id like easy_42 or hard_3 — share the URL and your friend opens the exact same board with the exact same walls. Solve times come back as a share-back challenge.
What is the best strategy for hard Zip puzzles?
Hard boards are 6×6 with seven checkpoints, so the checkpoint order almost fully dictates the route. Solve corridor by corridor between consecutive numbers, keep the corners covered, and truncate rather than reset when a pocket appears.
Does Zip work with both mouse and touch?
Yes — click or tap adjacent cells one by one, or hold and drag to paint the path in a single stroke. Tapping any cell already on your route truncates the path back to that point.