Kadon Enterprises, Inc., online store of original, award-winning puzzles and games in lasercut acrylic and wood. Play in online Puzzle Parlor. Annotated links to good resources.

Manufacturer of cube, pyramid, sphere, and cylinder wood puzzles and puzzle boxes. Free plans offered for construction.

This header plots the critical line of the Riemann Zeta Function. A complete understanding wins a $1, 000, 000 prize. . . . Main Links Orders Post Next Page Next + 10 THE ETERNITY PUZZLE Christopher Monckton's Eternity Puzzle (different image, larger image), William Waite's Batman Totem. It's been solved by Alex Selby and Oliver Riordan. Their Solution. Independently, it was also solved by Guenter ...

Polyominoes and Other Animals Connected subsets of the square lattice tiling of the plane are called polyominoes. These are often classified by their number of squares, so e.g. a tetromino has four squares and a pentomino has five; this nomenclature is by analogy to the word domino (a shape formed by two connected squares, but unrelated in etymology to the roots for two or square ). If a ...

Tiling and Packing Results ...

Gerard's Universal Polyomino Solver Years ago, I programmed a polyomino solution engine, that was able to solve any polyomino puzzle, based on run-time parameters. The first version of this program was written in Pascal, for the Apple II computer, and later I converted it to ANSI C, so it could be compiled for (almost) any computer. The same program is now avaliable in Java. On this page are a ...

Information on Pentomino Puzzles A pentomino is an arrangement of 5 unit squares (or sometimes cubes) that are joined along their edges. Up to isomorphism (rotating and flipping), there are 12 possible shapes, which are illustrated below. Each piece is labelled by the letter that most accurately reflects its shape. V T W X U Z F P I N Y L The problem is to fit the 12 pentomino pieces into ...

P O L .. Y A A ... O M I N O E S A plane topological disk (i.e. a plane region without holes ), consisting of n edge-to-edge adjacent squares is called a polyomino. Instead squares we could use n equilateral triangles or n regular hexagons, and to obtain, respectively, polyiamonds or polyhexes. We will restrict our discussion to polyominoes (with polyiamonds and polyhexes the situation is ...

Animal enumerations on regular tilings in Spherical, Euclidean, and Hyperbolic 2-dimensional spaces (not yet fully operational) Introduction Results Links Contact Introduction Let S be a 2-dimensional space (i.e., a surface), and let {p} be a regular polygon with p sides defined on S. This means that all sides of the polygon are straight lines (i.e., geodesics), that they have the same length, ...

Packing Polyominoes In each of the following animations, a collection of similar polyominoes (a union of unit cubes) are packed into a certain cube. There will be a little space left. Click on a picture to see the animation. 5 polyominoes in a 3x3x3 cube 9 polyominoes in a 4x4x4 cube ...