Logic · Path
One Line
Draw one line through every cell, visiting the numbers in order.
About One Line
One Line is a path-drawing logic puzzle: start at 1, visit every number in order and fill every cell of the grid with a single continuous line. Walls block some moves, so you need to plan the route rather than rush from number to number. Every puzzle has exactly one solution.
Play a new daily puzzle every day, or pick Easy, Medium or Hard in practice mode for unlimited puzzles.
How to play
- Start at 1 and draw one continuous line, moving up, down, left or right.
- Pass through the numbers in order 1 → 2 → 3 … and finish on the largest.
- The line must fill every cell, visiting each exactly once.
- Thick walls cannot be crossed.
Drag to draw; tap a cell on the line to rewind to it.
Press on 1 and drag to draw. Drag back onto the line to rewind to that point.
Tips & strategies
- Corners and dead-end cells can only be entered one way — fill them first.
- Look at what happens between consecutive numbers: is there only one short route?
- If a region would be cut off, the line has to visit it before moving on.
FAQ
How do you play One Line?
Start at 1 and draw one continuous line, moving up, down, left or right. Pass through the numbers in order 1 → 2 → 3 … and finish on the largest. The line must fill every cell, visiting each exactly once. Thick walls cannot be crossed.
Is there a new One Line puzzle every day?
Yes. A new daily puzzle arrives at midnight (your local time) and everyone gets the same one. Missed days can be played from the archive.
Do I need to sign up or install anything?
No. Daily Brain runs in your browser. You can add it to your home screen and it keeps working offline after the first visit. Progress is stored only on your device.
Are there difficulty levels and hints?
Practice mode offers Easy, Medium and Hard with unlimited new puzzles. Hints are available when you get stuck and are recorded in your result.