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Brain Teasers

• 61
• Riddle of the Week
• Just one question a week. Answer on e-mail.

• 62
• RiddleAday
• Riddles, puzzles and brain teasers to challenge and entertain all ages. [E-mail lists]

• 63
• Riddles.com
• Large riddle database categorized by difficulty. Includes a search feature.

• 64
• Scatty.com: Riddles
• Collection, sorted into lots of categories to amuse, puzzle and test.

• 65
• 9x9, 6x6 and Samurai Sudoku
• Offers classic Sudoku and variants, as well as an online solver.

• 66
• Daily SuDoku
• 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.

• 67
• Daily Sudoku
• Offers a different printable puzzle each day. Also includes solutions and FAQ.

• 68
• Flying Frog Consultancy
• This web page describes a 19-line (769-byte) OCaml program that solves Sudoku puzzles.

• 69
• Free Sudoku Puzzles
• Offers a free javascript version of the sudoku game.

• 70
• Hirofumi Fujiwara's Sudoku
• Offers a tutorial for creating puzzles, a Java-based solver, and links to other resources. [English/Japanese]

• 71
• Mister Sudoku
• Enjoy from a wide array of Sudoku variants including Killer and Jigsaw. Available on iPhone / Mac / Facebook.

• 72
• Play Sudoku
• Flash version of the Sudoku game. Also offers solution.

• 73
• Printable sudoku puzzles
• Easy printing of 6 sudokus per page.

• 74
• Prize Sudoku
• Offers competitions for prizes. Traditional Sudoku, Godoku (letters) and Super Sudoku (16x16).

• 75
• Solve My Sudoku
• Solves puzzles based on inputted information.

• 76
• Solving Sudoku
• Step by step guide to solving sudoku puzzles. Goes from basic to advanced techniques.

• 77
• SuDokuMate
• SuDokuMate is a SuDoku Helper (not a Solver) that replaces pencil and paper to aid solving.

• 78
• SudoCue - Home of the Sudoku Addict
• Extensive sudoku site with puzzles, variations, the "Sudocue" solver software, a forum, etc.

• 79
• Sudoku
• Play sudoku puzzles online for free.

• 80
• Sudoku
• Collection of printable grids, ordered by difficulty level. Solutions provided. Includes rules and solving methods.