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G4G13 Latin Square Puzzles
A small collection of Latin square themed puzzles created in honor of the G4G13 conference.
Mechanical Gift
I have gifted an assortment of laser cut acrylic kits of simple mechanisms, including locks, engines, and other such mechanical devices. These were originally designed as physical diagrams for a book project, but are now being produced for sale.…
A Flexier Hexaflexagon
This is a standard trihexaflexagon with some extra crease lines. Cut it out and fold it up in the usual way, using tape or glue, adding the extra creases. The new degrees of freedom allow the hexaflexagon to swim along itself like Escher's fish, as…
Tridecahedron Net
This net is similar to those in my 'Cubes and Things' 3D coloring books, where I use playful patterns to accent symmetries of polyhedra. By truncating one vertex of a dodecahedron, it becomes a tridecahedron. (Do you think truncating all the corners…
Marjorie Rice's "Versatile"
Two pages
(1) a description of how to construct Marjorie Rice's "versatile" together with six patches of copies of the tile that will fill the plane by translations.
(2) a sheet with 20 copies of the versatile to copy and cut out in order to…
(1) a description of how to construct Marjorie Rice's "versatile" together with six patches of copies of the tile that will fill the plane by translations.
(2) a sheet with 20 copies of the versatile to copy and cut out in order to…
The High Energy Particle Psychics's Puzzle
Noted high energy particle psychic Fermi Geller is conducting a study of detox particles in his lab. He has successfully generated 13 new particles of Woo-ium in his reactor, but he needs to move the particles into the numerologically stable…
The Bandaged Cube
An analysis and solution offered in tribute to Professor Erno Rubik and Professor David Singmaster for the 13th Gathering for Martin Gardner.
Laser Cut Pythagorean Theorem Puzzle
A laser-cut puzzle that illustrates a proof of Pythagoras’ theorem. The puzzle pieces either fit in 2 squares aXa and bXb, or in a hypotenuse square cXc. The shapes in the puzzle are taken from a known proof of Pythagoras’ theorem. To my surprise the…
Pentomino Divination Runes
A small bag containing twelve square tiles, each with a different pentomino marked on it. Instructions for use in divination are included, along with a set of puzzles using the runes.
The Missing 13th
A diecut construction model. Assemble it to discover the missing 13th piece.
A Lucky Dissection
A dissection puzzle involving the characters G413.
Balance of Power
Arrange the three pieces to create a figure with an axis of symmetry.
A Sliding Block Puzzle App
The app is no longer functional
12...N Polygons for Plane Tiling
I made pentagons of edges whose lengths are 1,2,3,4 and 5 in order and can be tiled the flat infinitive plane. And also hexagons of 1,2,3,4,5,6 edge length. A set of a few of them is my exchange puzzle.
1 to 8 Squared
A polyomino packing puzzle with 8 pieces ranging in size from 1 to 8. The main goal is to create a 6x6 square. Further goal shapes (and solutions) can be found on https://www.jaapsch.net/g4g/g4g13.htm
Knotted Bracelet
A hand-made rubber bracelet in the form of a trefoil knot. It is a mathematical curiosity, a puzzle, an impossible object, and a piece of nerdy jewelry.
The Icosian Game
A game created by Sir William Rowan Hamilton. A traveler must visit 20 cities without revisiting any of them.
The Elusive 13 Piece Complete Set Puzzle
Thirteen is an odd number of pieces for a complete set puzzle. I found one such set and created a puzzle using it.
Quandong Seeds Puzzle
A simple puzzle made using Quandong (desert peach) seeds. Quandongs can be found throughout the arid areas of Central Australia and are an important food source for people and native fauna such as emu.
A Collection of Match Stick Puzzles
Every week at my School's math club, we have one puzzle to solve based around match sticks. My gift exchange item will consist of a small booklet containing 21 match stick puzzles ( in honor of Martin Gardner being born on the 21st of October), as…
Lucky 13
13 beautiful puzzles of 13 different tiles each with 13 amazing solutions, all designed by Michael Dowle, and an introduction to the "Cookie Jar" puzzle Kadon Enterprises, Inc., is publishing of one of the 13 styles, having its world premiere at…
Loyd Polyominoes Puzzle
A puzzle of eight acrylic shapes which can be put together to form any one of the twelve pentominoes or the five tetrominoes. The discovery of this eight piece set is described in the paper "Development of the Loyd Polyominoes Puzzle" in the G4G13…
Latice Maze Puzzle
It’s a lattice-maze puzzle invented by Frank Worrell that I’m calling DoubleCrossed Squares. (Its old name was Lattice 2).