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One Line Draw

Draw the whole shape in one line — cover every line, no repeats!

Level 1 of 24

Triangle

0 / 3 lines

Tap a dot to start drawing!

🤔 How to play

Tap any dot to start. On tricky shapes, where you start matters!
Drag (or tap dot after dot) to draw along the lines.
Cover every line exactly once to win. You can't draw the same line twice!
Stuck? Use Undo, Restart, or a Hint 💡
Ready for a real challenge? Turn on 🖊️ No lifting — one single stroke, and lifting your finger starts the shape over!

Controls

Touch or mouse: press on a dot and slide along a line to the next dot, or tap one dot after another (not in No lifting, where every lift starts the shape over).
Keyboard: Tab moves between the dots and Enter or Space picks one. No lifting only counts for touch and mouse.

If you tap or pick a dot that is not joined to where you are, or you already drew that line, the dot wiggles and the helper says why. The helper also warns you as soon as your path can no longer finish. 💡 Before you start, Hint makes the good starting dots glow (on a loop shape, every dot glows). After you start, it flashes a line that still lets you finish, or tells you if your path can no longer finish. The 36 puzzles are sorted into Easy, Medium and Hard. Ticks for finished puzzles last only this visit.

What it practises

Planning a route ahead: choosing where to start and which line to take next so you do not get stuck. Every puzzle can be solved in one line. Nothing is scored or saved.

Ages 7+ · Logic & Puzzles · about 15 minutes

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🤔 How to play

Controls

What it practises

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Triangle