Untangle: Line Brain Puzzle
Untangle: Line Brain Puzzle is a planar graph brain teaser where you rearrange nodes so no lines cross. With 100 levels, drag and drop nodes until every connection is clean—red lines show crossings, blue means you are clear. Progressive difficulty, reset and re-scramble, and a sharp tech-style UI make it ideal for spatial reasoning fans.
How to Play
Drag any node to move it around the canvas. Red lines show intersections that need fixing. Blue lines are safe. Move nodes until all lines turn blue - that's when you've solved the puzzle! Use Reset to start over or Re-scramble for a new arrangement.
Controls
Desktop Controls
Click and drag nodes to move them. Use Reset to restart or Re-scramble for a new arrangement.
Mobile Controls
Touch and drag nodes to move them. All controls are touch-optimized.
Pro Tips
Focus on nodes with many connections first. Move nodes to separate crossing lines. When all lines turn blue, you've solved it!
Game Features
- 60 challenging levels with progressive difficulty
- Drag-and-drop node rearrangement
- Visual feedback with red (intersection) and blue (safe) lines
- Level progression with unlockable levels
- Reset and re-scramble options
- Mobile-friendly touch controls
Frequently Asked Questions
How do I play Untangle: Line Brain Puzzle?
Drag nodes around the canvas to eliminate line intersections. Red lines show intersections that need fixing. When all lines turn blue, you've solved the puzzle and completed the level.
What is Untangle: Line Brain Puzzle?
Untangle: Line Brain Puzzle is a planar graph optimization puzzle where you rearrange nodes to eliminate all line intersections. It features 100 challenging levels with progressive difficulty, making it perfect for puzzle enthusiasts who enjoy spatial reasoning challenges.
How many levels does Untangle have?
Untangle has 100 challenging levels that unlock progressively. Complete each level to unlock the next one, with level 1 always available to start your puzzle-solving journey.
What do the red and blue lines mean?
Red lines indicate intersections that need to be fixed. Blue lines are safe connections with no intersections. Your goal is to make all lines turn blue by rearranging nodes.
What's the best strategy to solve Untangle puzzles?
Focus on nodes with many connections first, as they often cause the most intersections. Move nodes strategically to separate crossing lines. Sometimes moving one node can resolve multiple intersections. Visualize the network structure before making moves.
What's the difference between Reset and Re-scramble?
Reset returns nodes to their original starting positions. Re-scramble gives you a completely new random arrangement for the same level, which can help if you're stuck on a particular configuration.
Is Untangle free to play?
Yes! Untangle: Line Brain Puzzle is completely free to play online. No downloads, no sign-ups, and no hidden costs. Just click and start playing instantly in your browser.
Do I need to download Untangle?
No download required! Untangle is a browser-based HTML5 game that runs directly in your web browser. Play instantly on any device without installing anything.
Can I play Untangle on mobile?
Yes! Untangle is fully optimized for mobile devices with intuitive touch controls. Simply touch and drag nodes to move them. The game works perfectly on smartphones and tablets.
What browsers support Untangle?
Untangle works on all modern browsers including Chrome, Safari, Firefox, and Edge. Since it's built with HTML5, it runs smoothly on desktop and mobile browsers without any plugins.
How does level progression work in Untangle?
Levels unlock sequentially - complete level N to unlock level N+1. You can replay any unlocked level anytime by accessing the level selection menu. Completed levels are marked with a checkmark.
What happens when I complete a level?
When you eliminate all intersections and all lines turn blue, a victory modal appears showing 'OPTIMIZED // ZERO INTERSECTIONS'. The next level automatically unlocks, and you can continue your puzzle-solving journey.