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.

Given 6 orientations X 15 starting locations X 2 directions of travel gives 180 routes equivalent to my previous route. All leading to the same solution.

Posted by Percy on 2005-11-25 09:05:05