Gerard's Universal Polyomino Solver - Computes from 1 to 3.38 billion solutions with graphic display to each of the 60+ problems of different sizes and shapes. Pieces vary from pentominoes to heptominoes, sometimes in combination. Table summarizes properties and example solution of each problem. [Java required].

A dissection puzzle - T. Sillke asks for dissections of two heptominoes into squares.

A Pentominoes Project from Belgium - Secondary School project about pentominoes and fun with math. History, descriptions, and problems. Bi-monthly pentomino competition. A solver is available. [English, French, Dutch]
Meta Description: [ This is a schoolproject of KSO Glorieux Ronse (Belgium) about pentominos. There is also a competition.You can visit the pentominozoo and solve many puzzles ]

A Puzzle by Enrich Friedman - Every square can be dissected into L-ominoes. Can every Pythagorean square? Conjecture needs proof.

Animal enumerations - Enumeration on regular tilings of the Euclidean and Hyperbolic planes.

Anna's Pentomino Page - Anna Gardberg makes pentominoes out of sculpey and agate.

Blocking polyominos - Rodolfo Kurchan asks, for each k, what is the smallest polyomino such that k copies can form a blocked pattern. With solutions.

Canonical polygons - Ronald Kyrmse investigates grid polygons in which all side lengths are one or sqrt(2).

Christopher Monckton's Eternity Puzzle - Rules, the solution by Alex Selby and Oliver Riordan, other resources and links. The puzzle is made up of 209 pieces of polydrafters, each one is a combination of 12-30/60/90 triangles.

Counting Horizontally Convex Polyominoes - Journal of Integer Sequences, Vol. 2 (1999), Article 99.1.8. Defines and counts horizontal convexity.

Cynthia Lanius' Lesson: Polyominoes Introduction - From tetris to hexominoes, Cynthia explains them in color.

Dancing links - Don Knuth discusses implementation details of polyomino search algorithms.

Eithan's Pentominoes-3D Applet Solver - Solves given Pentominoes 3D puzzles. Solution is displayed in 3-D with disassembly and rotations. General information and data. [requires Java]

Equilateral pentagons - Jorge Luis Mireles Jasso investigates these polygons and dissects various polyominos into them. Animations show cases of infinite solutions.

Eternity Page - Alex Selby's page with a description of his solution method, with illustrations in .png and .pdf files.

Flexagons - Folded paper polyiamonds which can be unfolded to show hidden faces. Make interesting school projects.
Meta Description: [ Magnus Enarssons hemsida. ]

Flexagons - Conrad and Hartline's 1962 article on Flexagons.
Meta Description: [ $FILE ]

Gamepuzzles - Polyomino and polyform games and puzzles manufactured by Kadon Enterprises Inc.
Meta Description: [ Kadon Enterprises, Inc., online store of original, award-winning puzzles and games in lasercut acrylic and wood. Play in online Puzzle Parlor, read a Journal, enjoy children's stories, coloring book, other interesting attractions and features. Annotated links to good resources. ]

George Huttlin's Puzzle Page - George Huttlin shares some ramblings in the world of polyominoes.
Meta Description: [ In introduction to pentominoes and tetrominoes, a simple font based on pentominoes, some novel pentomino problems, and some results of computer searches for solutions. ]

Gerard's Pentomino Page - Illustrates the 12 shapes. symmetrical combinations.

Golygons - Harry J. Smith's explains polyominoes with consecutive integer side lengths.

Golygons by Mathworld - What they are, and how to find them.

Harold McIntosh's flexagon papers - Including copies of the original 1962 Conrad-Hartline papers. Abstract, html-pages, or .pdf documents.

Henri Picciotto's Geometric Puzzles in the Classroom - Polyform puzzle lessons for math educators to use with their students, including polyominoes, supertangrams, and polyarcs.
Meta Description: [ Lessons, activities, and links by Henri Picciotto on using geometric puzzles to teach mathematics. ]

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

hexiamonds - George Huttlin explains and illustrates these shapes composed of 6 equilateral triangles, which in turn tiles different forms.
Meta Description: [ An introduction to hexiamond puzzles and some results from computer searches for solutuions. ]

Hyperbolic planar tessellations - Don Hatch's page on hyperbolic tesselations with numerous illustrations.
Meta Description: [ tesselations of the hyperbolic plane ]

Information on Pentomino Puzzles - At the Combinatorial Object Server.

Isoperimetric polygons - Livio Zucca tiles polygons of equal perimeter, or isoperiploes.

Java pentominoes - Thery families web site with pentomino solver. (English/French)[Java].
Meta Description: [ introduction aux pentominos,Mambo - the dynamic portal engine and content management system ]

Knight's Move Tessellations - Dan Thomasson looks at tesselations with numerous unexpected shapes traced out by knight moves.

Lego Pentominos - Eric Harshbarger. This puzzle maker says that the hard part was finding legos in enough different colors.

Livio Zucca's polyomino-covered cube - Colorful illustrations demonstrate how closed surfaces could be covered by polyominoes.

Logical Art and the Art of Logic - Pentomino pictures, software and other resources by Guenter Albrecht-Buehler.

Mathforum : a pentomino problem - from the Geometry Forum. Lists the pentominoes; fold them to form a cube; play a pentomino game. (project of the month, 1995)

Mathforum : minimal domino tiling - Tiling a square without cutting it into two.(Problem of the week 826, Spring 1997)

Mathforum : Tiling rectangles from ell - Stan Wagon asks which rectangles can be tiled with an ell-tromino.

Maximum convex hulls of connected systems of segments and of polyominoes - Bezdek, Brass, and Harborth. Abstract to an article which places bounds on the convex area needed to contain a polyomino. (Contributions to Algebra and Geometry Volume 35 (1994), No. 1, 37-43.)

404 Miroslav Vicher's Puzzles Pages - Polyforms (polyominoes, and polyiamonds) graphics, tables and resources (English/Czech).

my polyomino page - Michael Reid's numerous articles on polyominoes and tilnig, with references and links.

404 Packing Ferrers Shapes - Alon, Bóna, and Spencer show that one can't cover very much of an n by p(n) rectangle with staircase polyominoes (where p(n) is the number of these shapes).

Packing Polyominoes - Erich Friedman's Introduction to a variety of packing and tiling problems.

Packing polyominoes - Mark Michell investigates packing pentominoes into rectangles of various non-integer aspect ratios in order to obtain the largest possible pieces using straight cuts.

Pairwise touching hypercubes - Erich Friedman's problem of the month asks how to partition the unit cubes of an a*b*c-unit rectangular box into as many connected polycubes as possible with a shared face between every pair of polycubes. Answers provided.

Pento - Amamas Software offers a pentomino solving software.

Pento-Mania - Pentomino based puzzle game lets children solve and create geometric puzzles. Win32 software, try or buy.
Meta Description: [ Pentomino puzzle game provides geometric puzzles for all puzzle enthusiasts ]

Pentomino applet - Fill up a given area using pentomino shapes, rotating and flipping them. Three levels of difficulty.[Java].
Meta Description: [ Welcome to Fwend.com ! Enjoy our free selection of games and puzzles ! Bet you can't handle the SpaceWorm! Better try Crashpad or Blocks. Or maybe you like Word games? We have them, and more. Come and visit us today! ]

Pentomino Applet - Rujith de Silva's applet puzzle offers games of four different sized rectangles. [Java]

Pentomino Covers - Problems on minimal covers.

Pentomino dissection of a square annulus - From Scott Kim's Inversions Gallery.

Pentomino HungarIQa - Kati presents a pentomino puzzle using poly-rhombs instead of poly-squares. [English/French/German/Hungarian]
Meta Description: [ Pentomino hungarIQa. A játék ]

Pentomino Relationships - Symmetries in the families of rectangular solutions.

Pentomino, Homepage - Lorente Philippe's site describes the building blocks, nomenclature, solutions, and numerous games. (French/English)

Pentominoes - Expository paper by R. Bhat and A. Fletcher. Covers pre-Golomb discoveries. the triplication problem and other aspects.

Pentominoes - an introduction - Centre for Innovation in Mathematics Teaching presents colourful examples of many tiling problems, duplication, triplication, etc.

Pentominopuzzles. - Pentomino solver with download. Windows 95 and later required. [German/English]

Pentominos - Graphics problems, solutions (including animated GIF) and links. (English/German through main page)
Meta Description: [ Playings with Pentominos ]

Pentominos - B. Berchtold's applet helps tile a 6x10 rectangle. [German]

Pentominos Puzzle Solver - David Eck's graphical solver applet uses recursive technique. Source code available. [Java]

Polyform and dissection puzzle links - Christian Eggermont's link page.

Polyform spirals - Jorge Luis Mireles explains finite and infinite spirals made up of polyforms.

Polyforms - . Ed Pegg Jr.'s site has pages on tiling, packing, and related problems involving polyominos, polyiamonds, polyspheres, and related shapes.

404 Polygon Puzzle - Open source polyomino and polyform placement solitaire game.
Meta Description: [ freshmeat maintains the Web's largest index of Unix and cross-platform open source software. Thousands of applications are meticulously cataloged in the freshmeat database, and links to new code are added daily. ]

Polyiamond exclusion - Colonel Sicherman asks what fraction of the triangles need to be removed from a regular triangular tiling of the plane, in order to make sure that the remaining triangles contain no copy of a given polyiamond.

Polyiamonds - Mathforum. This Geometry problem of the week asks whether a six-point star can be dissected to form eight distinct hexiamonds.

Polyomino and Polyhex Tiling - Joseph Myer's tables of polyominoes and of polyomino tilings, in Postscript format.

Polyomino applet - Wil Laan's applet searches for solution of packing hexominoes into more than 45 different shapes.[Java]

Polyomino enumeration - K. S. Brown examines the number of polyominoes up to order 12 for various cases involving rotation or reflections. Equations linking the cases are proposed.

Polyomino Fuzion game - Puzzles using pentominoes and hexominoes. Fuzion, game that designs and (semi-)automatically finds solutions. Links.
Meta Description: [ pentomino and hexomino Fuzion puzzles with pentomino shareware game Fuzion that designs puzzles and finds solutions. By Ken Zeltner of ZeezRealm ]

Polyomino problems and variations of a theme - Jankok presents information about filling rectangles, other polygons, boxes, etc., with dominoes, trominoes, tetrominoes, pentominoes, solid pentominoes, hexiamonds, and whatever else people have invented as variations of a theme. References included.

Polyomino tiling - . Joseph Myers classifies the n-ominoes up to n=15 according to how symmetrically they can tile the plane.

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

Polyominoes - Introduction to Tetrominoes, Pentominoes, Hexominoes, Heptominoes, Octominoes, Fixed (translation only) Polyominoes. Numerous Links.

Polyominoes: Theme and Variations - A brief essay with some references.

Polyominoids - Jorge Luis Mireles Jasso presents connected sets of squares in a 3d cubical lattice. Includes a Java applet as well as non-animated description.

Polypolygon tilings - S. Dutch discusses polyominoes, poliamonds, and polypolygons with special attention to tiling characteristics.

Primes of a 14-omino - Michael Reid shows that a 3x6 rectangle with a 2x2 bite removed can tile a (much larger) rectangle. It is open whether it can do this using an odd number of copies.

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

404 Random domino tiling of an Aztec diamond - Matthew Blum demonstrates the properties of random domino tiling of an Aztec diamond. Interactive graphics display.

Rectifiable polyomino - Karl Dahlke explains and demonstrates tiling. Includes C-program source.

Schröder Triangles, Paths, and Parallelogram Polyominoes - A paper on their enumeration by Elisa Pergola and Robert A. Sulanke.
Meta Description: [ Schröder Triangles, Paths, and Parallelogram Polyominoes ]

Six squares problem - This Geometry Forum problem of the week asks for the number of different hexominoes, and for how many of them can be folded into a cube.

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

Soma cube applet - Mehta Ward Alberg explains the soma cube and provides an applet for practice. Source codes included. [Java]

Somatic - A solver for arbitrary polyomino and polycube puzzles. Binary code and source downloads available.
Meta Description: [ Somatic - a soma puzzle solver ]

sqfig and sqtile - Eric Laroche presents computer programs for generating polyominoes and polyomino tilings. Includes source codes in C, and binaries.

square into similar triangles - T.Sillke discusses the dissection problem.

Taniguchi's Programs - Windows software to solve polyiamond and sliding block puzzles.

Tesselating locking polyominos - Bob Newman examines the history of the subject and presents his minimal solutions.

The Geometry Junkyard: Polyominoes - Numerous links, sorted alphabetically.

The Mathematics of Polyominoes - Kevin Gong's home page includes articles, programs for Mac, Win and Java.

The mathematics of polyominoes - Kevin Gong offers download of his polyominoes games shareware for Windows and Mac. 100 boards are included. A Java version is in the works.

The Pentomino-Dictionary by Gilles Esposito-Farèse - English words that can be written using the pentomino name letters FILNPTUVWXYZ and other related curiosities, including a homage to Georges Perec. (English/French).

The Poly Pages - About various polyforms - polyominoes, polyiamonds, polycubes, and polyhexes.

The three dimensional polyominoes of minimal area - L. Alonso and R. Cert's abstract of a paper published in vol. 3 of the Elect. J. Combinatorics. Full paper available in different formats (.pdf, postscript, tex etc).

The tiling puzzle games of OOG - Mr. Confetti presents a Windows and Java game for tangrams, polyominoes, and polyhexes.

Thorleif's SOMA Page - SOMA puzzle site with graphics, newsletter and software.
Meta Description: [ SOMA puzzle ]

Three nice pentomino coloring problems - Alexandre Owen Muñiz presents the Icehouse set which lends itself to different polyomino coloring games.

Tiling a square with eight congruent polyominoes - Michael Reid's abstract of a paper in the Journal of Combinatorial Theory, Series A

Tiling and Packing Results of Torsten Sillke - Polyominoes, polycubes and polyspheres.
Meta Description: [ Tiling and Packing Results ]

Tiling of Pythagorean triplets - Joe Fields suggests that L-decomposition of squares of Pythagorean triplets could always be tiled.

Tiling rectangles and half strips with congruent polyominoes - Michael Reid's abstract of paper in the Journal of Combinatorial Theory, Series A

Tiling stuff - Jonathan King examines problems of determining whether a given rectangular brick can be tiled by certain smaller bricks. Includes numerous articles in .pdf format.
Meta Description: [ Home page of Professor Jonathan L.F. King, Mathematics Department of The University of Florida. Articles in Ergodic Theory and Tiling Theory. Course materials for current and past mathematics classes: Combinatorics, Measure Theory, Ergodic Theory, Topology, Complex Analysis. ]

404 Tiling UROP Homepage - Undergraduate Research Project in Random Tilings.

Tiling with notched cubes - Robert Hochberg and Michael Reid exhibit an unboxable reptile: a polycube that can tile a larger copy of itself, but can't tile any rectangular block. Abstract of article to Discrete Mathematics

Unbalanced anisohedral tiling - Joseph Myers and John Berglund found a polyhex that must be placed in two different ways in a tiling of a plane, such that one placement occurs twice as often as the other.

Unbeatable Tetris - Java applet demonstres that this tetromino-packing game is a forced win for the side dealing the tetrominoes. Complete with mathematical proof. [Java]

Unfolding the tesseract - Peter Turney lists the 261 polycubes that can be folded in four dimensions to form the surface of a hypercube, and provides animations of the unfolding process.

What is a Golygon? - Harry Smith describes Dr. Dewdney's article in the July 1990 Scientific American's Mathematical Recreations column.