Every square can be dissected into L-ominoes. Can every Pythagorean square?

Enumeration on regular tilings of the Euclidean and Hyperbolic planes.

Rules, the solution by Alex Selby and Oliver Riordan, other resources and links.

Journal of Integer Sequences, Vol. 2 (1999), Article 99.1.8

Java applet which solves the Pentominoes 3D puzzle. General informations and data.

Alex Selby's page with a description of his solution method.

Polyomino and polyform games and puzzles manufactured by Kadon Enterprises Inc.

Java code that can work out solutions for any of over 60 problems, some with hundreds and thousands of solutions.

Serial Isogons of 90 Degrees, defined by A.K. Dewdney.

Some packings of the 108 heptominoes (with unit thickness) into various blocks.

At the Combinatorial Object Server.

Pentomino pictures, software and other resources by Guenter Albrecht-Buehler.

Polyforms (polyominoes, and polyiamonds) graphics, tables and resources.

Contains two GIF animations of 3D polyomino packing including 5 polyominoes packed in a 3x3x3 cube and 9 polyominoes packed in a 4x4x4 cube.

A container of mathematical games, gadgets and software.

Problems on minimal covers.

Graphics, software, links. In English and French.

Pentomino based puzzle game lets children solve and create geometric puzzles. Win32 software, download free time-limited demo version.

Symmetries in the families of rectangular solutions.

Defined as square shapes that are directly connected to one another by one side, such as dominoes. Includes illustrations and a contest. In Dutch, French and English.

Graphics (including animated GIF) and links.

A Java applet for solving pentomino puzzles.

Tables of polyominoes and of polyomino tilings, in Postscript format.

Puzzles using pentominoes and hexominoes and a polyomino shareware game called Fuzion that designs and (semi-)automatically finds puzzle solutions.

Describes a numerical invariant that can be used to classify polyominoes.

A brief essay with some references.

Newsletter edited by Rodolfo Kurchan about pentominoes and other math problems.

Manufactures wooden puzzles of polyomino type. Includes Prices, tips, hints and pages with solution counts.

A paper on their enumeration by Elisa Pergola and Robert A. Sulanke.

Home Page of the inventor of polyominoes. Includes biography, black and white picture, research interests and publications list.

Looks at patterns that illustrate how the squares of polyominos are connected to each other.

Handmade wooden Pentomino and other puzzles; books.

Windows software to solve polyiamond and sliding block puzzles.

Numerous links, sorted alphabetically.

The English words which can be written with the pentomino name letters FILNPTUVWXYZ and other pentomino curiosities.

Of Jay Jenicek. Includes software for a game described on the page (2-3 players).

This is a fast Pentominos puzzle solver. Works on DOS/Windows platform.

Information on the various polyforms - polyominoes, polyiamonds, polycubes, and polyhexes.

Soma-solving program in QBASIC by Courtney McFarren.

SOMA puzzle site with graphics, newsletter and software.

Polyominoes, polycubes and polyspheres.

Undergraduate Research Project in Random Tilings.

Livio Zucca finds a set of markings for the edges of a square that lead to exactly 100 possible tiles, and asks how to fit them into a 10x10 grid.