Moving around the hexagons, go from S to F via the triangle paths.
You must move clockwise around orange hexagons and counterclockwise around green hexagons.
You must alternate "passing" orange hexagons and green hexagons. A hexagon is "passed" as soon as your path touches it, whether along a side or at a vertex. If your path adjoins hexagons of different colors, the one you came into contact with most recently is the one you have most recently "passed".
You may return to and "pass" a hexagon more than once (and count it in the alternation of green and orange hexagons), and you may retrace your path. However, you may not stop and reverse direction.
The example above shows a legal solution path. In the triangle marked with a red dot, the solution path cannot turn left and continue around the green hexagon. Why? Because the next hexagon encountered would be orange, but the most recently "passed" hexagon was also orange. So the path must fully detach from the green hexagon so that it can encounter it anew and "pass" it again before encountering the final orange hexagon.
Last updated: January 26, 2004
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