What is the minimum number of strokes to reproduce the drawing below without lifting up the pencil from the paper (no tricks at all), and without passing over a line segment (or part of it) already drawn? You may begin and end wherever you like, and line segments may cross each other, but only as intersections.

Note: a new stroke occurs when a line type ceased because you have to stop and change direction.

(In reply to re(7): No Subject by pcbouhid)

Thanks for clearing that up.

I've now found 2880 routes giving the same solution, is this all of them?

Posted by Percy on 2005-11-25 10:00:59