Mechanical Puzzles

Last modified December 5th, 2016

Some of my 3D printed puzzles can be purchased from on my online shop, Polypuzzles:

I also have a shop at Etsy.com, where finished puzzles can sometimes be found.

Contact email address: gibell-at-comcast-dot-net

Mechanical Puzzle Pages

A 12-Loop 4 G4G12 (12th Gathering for Gardner, 2016)
Lominoes for G4GX (10th Gathering for Gardner, 2012)
Lominoes for G4G9 (9th Gathering for Gardner, 2010)
The mathematics of Septoku (2008) (a Sudoku variant invented by Bruce Oberg)
G4G8 Chess Conundrum (8th Gathering for Gardner, 2008)
Diagonal Peg Solitaire (7th Gathering for Gardner, 2006)

Clock Solitaire, Cubism For Fun #101 (2016)
Pentomino Case Puzzles, Cubism For Fun #98 (2015)
Making your own Ball Puzzles, Cubism For Fun #95 (2014)
Pyradox: A Pyramid Packing Paradox, Cubism For Fun #94 (2014)
The Pennyhedron Revisited, Cubism For Fun #93 (2014)
Solving Jerry Gordon's Giant Pyramid, Cubism For Fun #90 (2013)
[The puzzle discussed in the article can be purchased here]
More Icosahedron Puzzles, Cubism For Fun #87 (2012)
Five Intersecting Tetrahedra, Cubism For Fun #85 (2011)
Sphere Octahedron Puzzles, Cubism For Fun #84 (2011)
Classification of Polyspheres, Cubism For Fun #81 (2010)
The Dynamics of Spinning Polyominoes (2009)
Solving Puzzles using Maps, Cubism For Fun #77 (2008) [Postscript added in 2014]
Some Notes on Ball-Pyramid and Related Puzzles, Leonard Gordon (1986), 18 pages
[I scanned in this obscure document, adding a few comments in red. Last modified: June 2014]

Spoiler alert!! Do not open solution links unless you want to see the solution!