Hamilton Puzzle Fill one-line

Hamilton puzzle or fill one-line is devised by Irish mathematician Sir William Rowan Hamilton in 1859, the rule is very simple -- find a route which will visit all connected vertices once and only once, no more and no less and at last return to the start point.

In this Hamilton puzzle or fill one-line game, I remove the last requirement (return to the start point), so now the rule is only to find a route which visited all blocks (vertices) once and only once. Although the rule is simple, the actual puzzle problem may become too hard to conquer in short time.

This Hamilton puzzle (fill one-line) game boasts 1500 puzzle problems, and there are 5 expertise levels (from beginner to master), plus for each level of expertise, there are 5 difficult levels from easy to insane, please feel free to choose the level that is best for you.

If a particular Hamilton puzzle or fill one-line problem is too hard to address, don't be upset as there are 3 tips per day can be used to help you conquer the hardest Hamilton puzzle (fill one-line) problem.

The Hamilton puzzle or fill one-line is good to keep your mind sharp, and helpful to kill the time.