Untangle Puzzle Online

Untangle is one of the classic one-player logic games in Simon Tatham's Portable Puzzle Collection. Reposition the points so that the lines do not cross.

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Preparing the game board and controls.

Game Objective

Drag the points around until no connecting line crosses another line. The lines stay attached to the same points; you are only changing where the points sit on the board.

Reposition the points so that the lines do not cross.

How to Play

Click and hold a point, drag it to a clearer place, then release.
Crossed lines are the problem to remove; moving a point moves all lines attached to it.
These puzzles reward careful deduction more than speed. Start with the most constrained clues, eliminate impossible choices step by step, and avoid guessing unless the puzzle specifically calls for it.

Beginner Tips

Two lines count as crossing only if they pass through each other in the middle, like an X. Lines meeting at the same point are normal connections and do not count as crossings.
Start with a point that has many crossing lines and move it toward the outside of the drawing.
Try to keep connected points near each other, because very long lines usually create more crossings.
After each drag, look for remaining line intersections and adjust one nearby point at a time.