Viennese Mazes: What They Are, and How to Make One

I love the idea of constrained mazes like this. Another related idea is that of &quot;plank puzzles&quot; (<a href="http://www.clickmazes.com/planks/ixplanks.htm" rel="nofollow">http:&#x2F;&#x2F;www.clickmazes.com&#x2F;planks&#x2F;ixplanks.htm</a>), which constrain available moves based on which planks you currently have access to.

Very cool puzzles and nice to share the code.<p>One thing about the example mazes&#x2F;solutions. On the hard one, isn&#x27;t tqp-khe-bdc-a a faster solution to the hard one listed?&#x2F;Doesn&#x27;t going t-r first violate the red light rule?

Sounds very similar to logic mazes (classic example for me is Theseus and the Minotaur)

One of the example solutions breaks the rule of &quot;only pass a light once&quot;