Each slitherlink on this page is made by our generator and checked by the slitherlink solver, which proves there is exactly one loop and that its explained steps reach the end without blind search.
How to play slitherlink
- Draw lines between neighboring dots to form one closed loop.
- The loop never crosses itself and never branches: every dot has either two lines or none.
- A number in a square says how many of its four sides are part of the loop. Squares without a number can have any count.
Tap between two dots to draw a line, tap again to put a cross there (no line), and once more to clear it. Drag along the grid to draw a stretch at once; a long press or right click places a cross. A number turns gray when its count is met and red when it can no longer be met.
Levels
Every grid is solved by the rules (zeros, corners, the line count at each dot, the single-loop rule) plus trial steps: suppose an edge is drawn, follow the rules, and if something breaks, the edge is empty. Easy grids are 5 by 5 and need at most four trial steps; medium grids are 7 by 7 and hard grids 10 by 10, with as many trial steps as it takes. Hard grids come from a bank we generated and checked this way, because each one takes a few seconds to find.
Strategy
- Zeros: cross all four sides of a 0, then look at the dots around it.
- Corners: a 3 in a corner uses both outer sides; a 1 in a corner uses neither.
- Adjacent 3s: two 3s side by side share the line between them and the two parallel outer lines.
- Dots: a dot with two lines is finished, so cross its other edges; a dot with one line must continue through its only open edge.
- One loop: never close a small loop while other lines are still loose.
Hints and statistics
Hint draws or crosses the next edge it can prove and says why, from the rules or from a trial step. Check and Show mistakes compare your lines with the answer; best times and the daily streak are stored per level. For more loop and path puzzles, try numberlink and bridges.
Solver tested . Found a problem? Tell us.
Questions
Can the loop touch itself at a dot?
No. Each dot on the loop has exactly two lines, so the loop cannot touch or cross itself.
Does the loop have to pass every dot?
No. Dots the loop does not use simply stay empty.
What do the crosses do?
Nothing for the answer: they are notes that an edge has no line. They make the next deductions easier to see, and Check also marks a cross that sits on the real loop.
Is the daily slitherlink the same for everyone?
Yes. One grid per level is chosen from the date by our generator or bank, and it changes at midnight on your device.