PureBasic Forums - English

"Flatland Lock" from the book "Leonardo's Mirror & other Puzzles" some pages available in google books and depicted here ...
The object is to remove in succession the four linkages (red green orange blue) the grey blocks are not movable, and the dark blue are empty space. the solution in page 4 on the above document:

and in page 5 there is a printable shape so we can construct a real Flatland Lock from paper easily.

there should be a commercial plastic or metal version of this lock.

https://en.wikipedia.org/wiki/Flatland
I'd read about Flatland before but not heard of this lock, thanks for sharing!

Keya, there is also a more complex and mechanical 2D Lock : look page 17 : https://web.archive.org/web/20121021095 ... 7-1980.pdf
the purpose is to slide the bottom door to the right and the only way is to push the correct shape of a key so the 3 tumblers align exactly (no rotation allowed for the key):