No left turn mazes
Your challenge is to find a route for the black dot to reach the red square without ever turning left, or making a U-turn. Harder than it looks!
Here is a photo showing a mechanical version of a No-X-turn maze (in this case a no-right-turn maze). It was made by Oskar van Deventer and based on Adrian Fisher's Jammed Tractor design. A special half-moon shape under the tractor prevents it from turning right or backing up.
Here is a full-size no-right-turn maze of my own design built using reconfigurable decking squares that simply click together and can then be boxed up again for easy storage. This one was built for a house-warming party in July 2005.
Footnotes
No-X-turn mazes were first offered to the public in the late 1990s as full-size walk-round mazes to accompany maize-mazes in the USA and UK. They are most frequently built using bales of hay. You can read about all types of walk-through mazes and see some photos here at Robert Abbott's site.
Applet - © Andrea Gilbert 2000-05 (not currently available)
Maze designs - © Andrea Gilbert 2000 & Palmer Mebane 2005 & Jack Kutilek 2021
No-X-turn mechanical puzzle - © Oskar van Deventer 2000
Jammed Tractor maze design - © Adrian Fisher 1998