One Line Draw

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What is One Line Draw?

One Line Draw is a minimalist and deeply satisfying brain puzzle game that proves simple rules can create the most complex challenges. Based on the classic mathematical "Eulerian Path" problem, your objective is to connect a series of dots to form a complete shape—the catch is that you must do it with one continuous stroke. You cannot lift your finger (or mouse), and you cannot retrace a line you’ve already drawn. It is the perfect digital "brain snack" for players of all ages.

How to Play

Don't let the clean design fool you; One Line Draw will push your spatial reasoning to its limits. Here is how to conquer the grid:

Start the Path: Click or tap on a dot to begin your line.
Connect the Dots: Drag your line to the next dot to fill in the segments. Every single segment in the diagram must be covered to pass the level.
The Golden Rule: You cannot draw over the same line twice! Plan your route carefully before you start.
Stuck? No Problem: If you find yourself in a dead end, use the Undo button to go back one step or Reset the level to try a completely different strategy.

Game Features

Why is One Line Draw a top-rated puzzle on HeadBallGame? Here’s what awaits you:

Hundreds of Levels: From simple triangles to complex architectural blueprints, the difficulty scales smoothly as you progress.
Daily Brain Training: Spend just 5 minutes a day playing to improve your focus, logic, and cognitive flexibility.
Clean, Stress-Free Visuals: The minimalist aesthetic and soothing colors make this a great way to unwind and de-stress.
No Installs Required: Play instantly in your browser on desktop, tablet, or smartphone—100% free and unblocked.

Pro Tips for Puzzle Masters

Having trouble with a complex shape? Look for Odd Junctions. In graph theory, if a dot has an odd number of lines coming out of it, you must either start or end your path at that dot. If there are more than two "odd" dots, the shape is impossible to draw in one stroke—but don't worry, every level in One Line Draw is guaranteed to have a solution! If you're stuck, try starting from the opposite side of the shape; sometimes a change in perspective is all you need.

Play for Free on HeadBallGame

Ready to test your IQ? One Line Draw is available now on HeadBallGame. Challenge your friends, sharpen your mind, and see how many shapes you can complete in one go. The path to genius starts with just one line!