Big Knot Variation
Puzzle
Burr puzzle designed by Oskar van Deventer (used with permission). For G4G14, this 14-piece puzzle felt appropriate. Contrary to the name of the puzzle, these exchange puzzles are in fact rather small.
<br />Solution is available on <a href="https://buttonius.com/solutions/big-knot-variation/index.html" target="_blank" rel="noreferrer noopener">https://buttonius.com/solutions/big-knot-variation/index.html</a>
Oskar van Deventer
G4G14
Peter Knoppers
G14-005
Custom Zometool Struts
Puzzle
3D printed custom Zometool struts, and a Zometool ball.
G4G14
Aaron Siegel
Scott Vorthmann
G14-007
Free the Pearl
Puzzle
Applying the planar puzzle mechanism of the Magic Disc puzzle to a three-dimensional form yields an interesting and challenging coordinate motion puzzle.
Bruce Patterson
G4G14
John Partridge
G14-008
Entropy
Puzzle
Sudoku with some added rules. This puzzle can only be solved in conjunction with the gift "Palindromes" by Elizabeth Gallagher.
G4G14
Neil Calkin
G14-009
Cube-it Puzzle
Puzzle
9 loose square wafers of plastic with a hole in the center of all but one that has a cylindrical pin. It is clear that the wafers can be stacked on the pin. 7 of the wafers have notches of various size in the edges. There are no hints included. Each wafer can be flipped or rotated in 4 positions in relations to each other and can be in one of 8 positions on the stack. The goal is to find out what it is.. and I'm not telling! The puzzle is 3d printed in white PLA, using two Creality CR10S printers. It was designed using Rhino and sliced using Simplify3D.
G4G14
Craig Newswanger
G14-013
A G4G14 Puzzle
Puzzle
Recreational Math
This is a paper ring with a number puzzle. The hint is actually the logo that is at the beginning (which of course will be right after the end when it's a ring).
G4G14
Skona Brittain
G14-014
Troxes
Puzzle
Like Origami meets Lego. No scissors, tape, or glue. This modular paper cutout is based on triangular geometry and mates with neighbors (edge-connecting) to create tetrahedra, octohedra, and icosahedra. The resulting polyhedra can then mate once again in their volumetric form by face-connecting with other polyhedra.
Troxes were inspired by Jef Raskin's Bloxes, a cardboard architecture exploration. Troxes in contrast are hand-held, created from a beautiful single ply paper called Plike, and promote non-rectilinear spatial exploration and awareness.
Troxes have won numerous awards at Maker Faires and been featured at the MIT Museum, New Museum and MoMath in NYC amongst other top art and design institutions.
G4G14
Jonathan Bobrow
G14-020
Polarizing Puzzle
Puzzle
Two rectangular sheets that filter light according to polarization- with a twist. Rotating the two sheets ninety degrees with respect to each other results in all light blocked as expected, but flipping over a sheet also gives a similar result. Does this imply new physics? Reconciling this unexpected behavior is the problem left to the reader.
G4G14
Raymond Hall
G14-022
Palindromes
Puzzle
Sudoku with some added rules. This puzzle can only be solved in conjunction with the gift "Entropy" by Neil Calkin.
G4G14
Eliza Gallagher
G14-024
Magic Pizza Guy
Magic
Puzzle
Solve these puzzles and get a pass to the Magic Castle.
G4G14
Nathaniel Segal
G14-026
Warped-Grid Jig-Saw Puzzle
Puzzle
With a laser-cutter, it is easy to make one-of-a-kind jigsaw puzzles. The question then is what pattern of cuts to use. Here is a gallery of some experiments I have been making in which the cut pattern is based on a warped grid. A pseudorandom grid-based dissection of an underlying rectangular array is distorted to give engaging visual effects.
G4G14
George Hart
G14-028
Octaroller
Puzzle
Recreational Math
BUILD your OCTAROLLER ! from 3 parts square.
RACE your OCTAROLLER ! down the ramp in a straight line.
CHEER your OCTAROLLER ! with supplied cheering pom pom on a toothpick.
Octaroller is included in Geometric Foundations of Design: Old and New -
(Knots and Everything) by Jay Kappraff.
G4G14
Dick Esterle
G14-029
Puzzle Menu
Puzzle
Recreational Math
A puzzle hunt hidden inside an 8-page pamphlet.
Bill Chang
G4G14
Nick Baxter
G14-039
Guess-o-matic
Puzzle
This DIY paper-engineered magic trick performs an astonishing feat of mentalism thanks to a bit of secret mathematics.
G4G14
Adam Rubin
G14-041
StarHex-14: Theo Geerinck's 14 Polystars
Puzzle
Recreational Math
14 tiles consisting of hexagons with 0 to 6 equilateral triangles attached on their edges can be cut from card stock provided to solve the large collection of puzzle figures presented. Five colors, each tile shape is unique with one mirror pair. Rules for two strategy games for two players are included.
This is the printed version of StarHex-I that I make in lasercut acrylic sold on the Kadon website, <a href="http://www.gamepuzzles.com/tiling2.htm#SH14" target="_blank" rel="noreferrer noopener">www.gamepuzzles.com/tiling2.htm#SH14</a>
G4G14
Kate Jones
G14-042
I AM THE RHOMBUS
Puzzle
Recreational Math
In one package: the strip of triangles and brochure for this new flexagon. The colorfully illustrated brochure will include folding directions, flexing directions, and images of the different possible faces.
G4G14
Ann Schwartz
G14-043
14 Blocks
Puzzle
All you have to do is move the large 2x2 block to the bottom right hand corner by sliding the blocks. Do not lift, turn or twist any block.
G4G14
Marti Reis
G14-044
A Torus Without Diagonals
Puzzle
Recreational Math
Cut-and-fold a polyhedron with 7 vertices, 14 faces, 21 edges, and a hole through it like a doughnut. A cube has internal diagonals that connect the diametrically opposite corners. By contrast, this polyhedron has no internal diagonals. There are three other 14-faced polyhedra like this. The only other known example of a polyhedron with no diagonals is the tetrahedron.
Akos Csaszar
G4G14
Gwen Fisher
Barry Hayes
G14-045
Walk a Crooked Path
Puzzle
Game
In this puzzle you must find the most crooked path on a board made of squares. Each square is visited at most once, but you need not visit all squares. Your path goes from square to adjacent square, and should have as many 90-degree turns as possible.
G4G14
Jaap Scherphuis
G14-047
Penrose P3
Puzzle
Art
Recreational Math
I am making paper flexagons with Penrose patterns on them to illustrate the patterns. My stuff touches three things from Martin Gardner, Flexagons, Penrose Tiles, and Polyominos (the classification system for tetraflexagons is based on these with a minor redefinition of polyomino).
See demostration: <a href="https://youtube.com/shorts/HUFKLH3Igqo">https://youtube.com/shorts/HUFKLH3Igqo</a>
R2D3 Designs R2D3 Deseigns
G4G14
Red Deupree
G14-049
Traveling Through the Sierpinski Carpet and Menger Sponge
Puzzle
Recreational Math
An ant wants to travel from one corner of the Sierpinski carpet to the opposite corner using the shortest possible route. And his friend, a termite, wants to do the same in the Menger sponge. Can you guide them well?
G4G14
Derek Smith
G14-052
Rep-Tile Tangram
Puzzle
Recreational Math
The gift will be a number of cut-out pages to create a rep-tile tangram: A tangram shape that is made from tangram shapes, that are made from tangram shapes.
G4G14
Sabine Segre
G14-053
The Art of Destroying Flexagons
Puzzle
Toy
Recreational Math
Destroying flexagons can be fun and artistic! We suggest 4 different ways to artistically destroy flexagons, each with its own merit. Our exchange gift is a set of 4 flexagons strips, one for each demonstration and the attached explanation sheet.
G4G14
Yossi Elran
G14-054
14 Rabbiducks
Puzzle
Recreational Math
The puzzle is to fit 14 “rabbiduck” polyomino pieces into an 8x11 rectangle. (Gardner wrote about polyominoes in multiple columns. The specific polyomino pieces used are inspired by the rabbit/duck illusion that Gardner called the Rabbitduck in his autobiography.)
14 “Rabbiduck” Pieces that look (crudely) like a rabbit or a duck depending on orientation.
G4G14
Haym Hirsh
G14-055
Leaping Crossword No. 2
Puzzle
Game
Word Play
A one-page puzzle with attached solution will be provided, including the instructions for this variant and the clues and grid.
G4G14
Joe DeVincentis
G14-057