网站简介：Play online puzzles at one of four difficulty levels. Also includes a solver program and hints. Software for Pocket PC and Windows also available.
网站简介：Daily killer and greater-than killer sudoku puzzles that can be played online or printed.
网站简介：One Samurai Sudoku puzzle each day, with a step-by-step solver.
网站简介：Home site for the Binary Arts line of mind puzzles.
网站简介：All you want to know about Rubik's Puzzle building, collecting and speedcubing.
网站简介：Support for sudoku puzzle solvers who are readers of The Daily Telegraph and the Los Angeles Times newspapers. News, information, puzzle archive, competitions and a forum that has loads of hints tips and discussions -- all to do with this addictive little puzzle.
网站简介：Interactive java puzzles and activities in different mathematical topics.
网站简介：Sunday puzzles from the San Francisco Examiner available for purchase.
网站简介：Offers daily printable puzzles of varying difficulties, including Sudoku for Kids. Also offers archive of past puzzles, tool for rendering custom puzzles, FAQ, and books for purchase.
网站简介：Site with many Sudoku variants, all playable online.
网站简介：Manufacturer of many different types of Rubik like puzzles.
网站简介：Mental & Perceptual Activities that Enhance Critical and Creative Thinking Skills. Brain games, mental activities and recreational mathematics including puzzles to make and solve, tessellations, geometric puzzles, optical illusions, and many other curiosities.
网站简介：A site for crossword puzzle constructors, editors and avid solvers. Features a puzzle database, instructional resources, a discussion forum, news items and more.
网站简介：Two new Killer Sudoku puzzles every day, solvable online.
网站简介：Shows the logic behind solving sample games square by square.
网站简介：Step by step Rubik's cube solution with animations and pictures for beginners.
网站简介：Crosswords, wordsearches, cryptograms, quizzes, wordplay and other interactive and printable puzzles and games.
网站简介：Makers of jigsaw puzzles and board games.
网站简介：Riddles, trivia, illusions, puzzles, and brain teasers.
网站简介：Solves crossword clues based on word length, known letters, and the category of the clue.
网站简介：Word searches covering a variety of topics, including a selection for kids.
网站简介：Printable word searches for all difficulty levels.
网站简介：An efficient method based on understanding rather than memorization.
网站简介：Easy printing of 6 sudokus per page.
网站简介：Free daily puzzles available to print out and solve.