There's a version of this puzzle included in Simon Tatham[1]'s Puzzles: https://www.chiark.greenend.org.uk/~sgtatham/puzzles/js/untangle.html https://www.chiark

There's a version of this puzzle included in Simon Tatham[1]'s Puzzles: https://www.chiark.greenend.org.uk/~sgtatham/puzzles/js/untangle.html https://www.chiark.greenend.org.uk/~sgtatham/puzzles/js/unta... Available for all major platforms and a great way to waste time. [1] of Putty Fame