Draw it without lifting the pen.
Every figure can be drawn in a single unbroken stroke — if you start in the right place. Tap a dot, then the next, and the line follows. Use every edge exactly once and the sheet is done.
Play in the browser Send me the build
Tap any dot to begin.
Eight sheets, each harder than the last. A figure is solvable in one stroke only when it has zero or exactly two dots with an odd number of lines — and if there are two, you must start at one of them.
Want it on your PC or phone?
Same puzzles, packaged for Windows and Android, with forty sheets instead of the eight here. Leave an address and we send the link ourselves — one email, nothing else ever.
- Does it cost anything?
- No, and there is nothing inside to buy.
- Can I win something?
- No. Nothing here converts to money, goods or prizes.
- Why 18+?
- We hold email addresses for the build links and would rather not hold children's.
- Where did the puzzles come from?
- Classic graph tracing — the Königsberg bridges problem, drawn nicely.
About the sheets
Eight figures ship in the browser version, from a house and an envelope up to a twelve-line mill. Each one has at least one valid starting dot, and most have exactly two. Finding which corner to begin from is the actual puzzle — the drawing part is easy once you know.
Trails worth drawing
This puzzle came out of sketching on walks — badly, quickly, in a notebook that gets rained on. Drawing makes you look at a ridgeline instead of photographing it and moving on. These are the routes we keep going back to.
The Overland Track
Six days through the Tasmanian highlands, where the weather changes faster than the terrain.
The Great Ocean Walk
Eight days of Victorian coast, with tide tables deciding half your day.
A sketching kit that survives
Pencil over pen, a board over a book, and how to work fast enough to keep walking.
Walking safely here
Heat and water end more walks than wildlife. The practical layer, in order of what actually goes wrong.