Several organizations publish online puzzles of the day, including JigZone.com, Shredder, The Old Farmer's Almanac, Sudoku Kingdom and SETGame.com. Daily puzzles are available in many formats and feature a variety of puzzle types, such as word games, math puzzles and brain teasers.
JigZone.com provides visitors with a new online jigsaw puzzle each day. The puzzle includes a finished picture and allows the user to compare his time with the site average. Visitors can also access previous puzzles.
ShredderChess.net offers easy, medium and hard daily chess puzzles and also allows visitors to complete puzzles from the previous two days. Players must make correct chess moves to solve the puzzle.
Those who prefer riddles and brain-teaser games can visit Almanac.com to complete the puzzle of the day, as well as riddles from the previous seven days. A player can check his answer by clicking a link.
Sudoku fans can complete a new puzzle each day at SudokuKingdom.com. The puzzles are interactive, but also offer a print option. Individuals with free Sudoku Kingdom accounts compete for high scores and the chance to win monthly giveaways.
SETGame.com publishes two daily math puzzles and a word game of the day, based on the company's board games: SET, Xactika and Quiddler.