Iwahnary

This CAD model was designed by Oskar van Deventer, copyright (c), 18 September 2024.

Iwahnary is a puzzle based on an idea by Iwahiro (Hirokazu Iwasawa). Iwahiro discovered an interaction pattern for an exponential puzzle as follows: 210-211, 021-022. This is shorthand for "a piece can move between states 0 and 1 when its two upper neighbours are in states 2 and 1, and a piece can move between states 1 and 2 when its two upper neighbours are in states 0 and 2". So each rotor piece can have three states: 0, 1 and 2. The rotors are placed on a hillside, and each rotor interacts with its two upper neighbours as described by the interaction pattern. Later, Iwahiro found another pattern with similar properties: 020-021, 001-002. Both patterns result in a "phinary" puzzle. That is, the number of moves to solve increases by a factor phi (golden ratio, 1.618) for each piece added. Surprisingly, whereas both patterns are "phinary", the latter requires many more moves to solve than the former.

Here are some links about this design.
https://www.youtube.com/watch?v=aIBBuu9Hhrw
https://i.materialise.com/en/shop/item/iwahnary
https://i.materialise.com/forum/t/iwahnary-by-oskar-iwahiro/3818
https://twistypuzzles.com/forum/viewtopic.php?t=39913

Feel free to 3D-print an extra sample to give to a friend, as long as you mention the designer and don't charge money.

If you are planning to sell some samples, then please contact me for a license agreement. The royalty fee is 10% of your selling price.

Please do not upload the design to a commercial service, or redistribute the design in any way other than linking to the YouTube video: https://www.youtube.com/watch?v=aIBBuu9Hhrw

Enjoy!

Oskar
11 January 2024

Contact: 
https://oskarvandeventer.nl/index_contact.php?subject=Print%20It%20Yourself


