Subcategories 
Links to WWWpages 
 Puzzle Classes and definitions and a lot of beautifull pictures of puzzles 
 The Slocum Puzzle Foundation was established on August 10, 1993 as a nonprofit public benefit Corporation. It was approved by the State of California and the U.S. Government as a charitable and educational Foundation. The purpose of the Foundation is to educate the public on puzzles, their history, development, and use in various cultures of the world. The Foundation will actively support the use of puzzles for education. 
 The idea is that you specify a type of combinatorial object, together with specific parameter values, and COS will return to you a list of all such objects. COS can generate permutations, combinations, various types of trees, unlabelled graphs, linear extensions of posets, pentomino puzzle solutions, numerical partitions, and a host of other combinatorial objects. 
 Directory of Mechanical Puzzle Collectors. This page will hopefully eventually cover much of the information available in Jerry Slocum's Directory of Puzzle Collectors (subject of course to the permission of the collectors there). It's purpose is to help puzzle collectors find and write to other collectors with similar interests. 
 Some good puzzle forms and javaversions! Nice site. 
 His Puzzle Collecting Page. Includes his collection and some more information e.g on manufacturers. 
 Some very interesting puzzles. Regularly updated. And has a maillinglist to keep you informed about updates. 
 A HTMLversion of the rec.puzzles archive (at tudelft) 
 at xraysgi.ims.uconn.edu. Collected by David Moews 
 at the Centre for Innovation in Mathematics Teaching. Some nice puzzles... some oldies but also some not so old.. 

These pages contain usenet clippings, web pointers, lecture notes, research excerpts, papers, abstracts, programs, problems, and other stuff related to discrete and computational geometry. Some of it is quite serious, but I hope much of it is also entertaining. The main criteria for adding something here are that it be geometrical (obviously) and that it not fit into my other geometry page, Geometry in Action, which is more devoted to applications and less to pure math. I also have another page on nongeometrical recreational math. 
 Do you think you a lot about Pi check this out ... 
 Interactive Mathematics Miscellany and Puzzles 
 Puzzles and Games from the famous author of Alice in Wonderland... 
 Some conjectures/puzzles and (partial) answers... 
 "All high school students in the United States are hereby cordially invited to take part in the USA Mathematical Talent Search (USAMTS). While most other competitions have stringent time limits, the USAMTS allows for more reflection on the part of the participants. We wish to foster not only insight, ingenuity, quick thinking, and creativity, but also writing skills and the virtue of perseverance. The USAMTS consists of four rounds, with each round featuring five problems." Problems worth puzzling... 
 's Puzzle of the Week. With archive. Some interesting puzzles 
 Math Forum  Problem of the Week 
 PUZZLE FUN is a bulletin about polyominoes and other puzzles. In each number you have a differentis issued from 2 to 4 times a year. This is the "Online" version. topic. It 
 A page by Tom Longtin with beautifull computer generated 'prototype' puzzles 
 Mostly links. Also an artt. on "Games for the Rest of Us". 
 A page with some of the history of Mathematical games and recreations 
 The Puzzle Ring is an everexpanding ring of web pages devoted to puzzles, including crosswords, word searches, Java puzzles, cryptograms, word games, mazes, logic problems, and just about any other puzzles you can think of. Take a look at the list of all connectedsites to see if there are some interesting new ones. I find most of them are not interesting but you might... 
 each time a random puzzlesite of the puzzle ring. 
 A short text about ... yes 
 not really puzzles but what it says. 
 I do not like most presented puzzles here, but you might. 
 World Game Review. A magazine concentrating on areas not heavily coverd by other magazines. 
 1001 uses for a playful brain. Slightly dry. But still some things are interesing 

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