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. The earliest known mazes of this form were designed by Robert Abbott. Read more here.
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