Logic · Drawing
One Stroke
Without lifting your pen, trace every line exactly once.
About One Stroke
One Stroke asks you to trace a figure without lifting your pen, using every line exactly once. It is the classic Euler path puzzle: if two points have an odd number of lines, you must start at one of them and finish at the other.
Play a new daily puzzle every day, or pick Easy, Medium or Hard in practice mode for unlimited puzzles.
How to play
- Start anywhere and trace the figure continuously, using every line exactly once, without lifting the pen.
- Points can be visited many times, lines only once.
- Fun fact: if two points have an odd number of lines, you must start at one and end at the other.
Undo goes back one step; Reset clears the drawing.
Press on a point and drag through neighboring points. Drag back to undo a step.
Tips & strategies
- Count the lines at each point to find the odd ones.
- Start at an odd point if there is one.
- Do not cross a bridge that would leave lines unreachable.
FAQ
How do you play One Stroke?
Start anywhere and trace the figure continuously, using every line exactly once, without lifting the pen. Points can be visited many times, lines only once. Fun fact: if two points have an odd number of lines, you must start at one and end at the other.
Is there a new One Stroke 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.