Untangle· Advanced

Goal

Drag the nodes to rearrange them until no lines cross each other.

How to Play

  • Touch and drag a node to move it
  • Red lines indicate crossings with other lines
  • Puzzle is complete when all lines are blue (no crossings)

Completed Example

NG
OK

Tip

  • Start with nodes that have fewer connections at the edges
  • Arranging nodes in a circular shape often reduces crossings

Untangling tasks require visual tracking and divided attention simultaneously, measuring the ability to monitor multiple elements at once.

  • Verhoeff, T. (2004). On the complexity of untangling planar graphs. Journal of Graph Algorithms, 8(2), 201-212.