This web page provides information on (and solutions for) some of my mechanical puzzle designs. Please note that these puzzles are all copyrighted and may not be reproduced without permission.
Double-Hole Pin Cube - Exchange puzzle for International Puzzle Party 20 in Los Angeles, California, August 2000.
The "Twenty" Cube - Exchange puzzle for International Puzzle Party 21 in Tokyo, Japan, August 2001. Made under license by The Lagoon Group as "Mental Block" and sold by Mr. Puzzle, Module R, Amazon, and others. It is also made under license in Russia by Planet Puzzle under the name of "Cube of 4 Items" (Translation).
The Keyhole Puzzle - Exchange puzzle for International Puzzle Party 22 in Antwerp, Belgium, August 2002.
L-ements - Exchange puzzle for International Puzzle Party 23 in
Chicago, Illinois, August 2003
(also note related Eight L-ements puzzle, made under license by Creative Crafthouse. Note the video).
Seven L-ements - Exchange puzzle for International Puzzle Party 25 in Helsinki, Finland, July 2005.
Keyhole Cube - Exchange puzzle for International Puzzle Party 26 in Boston, Massachusetts, July 2006.
No time to do my own exchange puzzle for the International Puzzle Party 27 in Brisbane, Australia, August 2007, so I exchanged the Duodeciburr puzzle (puzzle and solution here), designed and made by Vinco.
Again, no time to do my own exchange puzzle for the International Puzzle Party 28 in Prague, Czech Republic, August 2008, so I skipped the puzzle exchange this year.
Logical Progression - I consider this to be my best puzzle design. Although it has 16 pieces, the puzzle was carefully designed to be rich in discovery and have a logical solution. The entire puzzle can be assembled from start to finish without any guesswork.
As of this writing it is made and sold by
Questions/comments? My email address is firstname.lastname@example.org .