Daily sudoku online: free and newspaper sudokus each day

For one free grid a day, Daily Sudoku has a dated Special Daily Sudoku on a classic 9x9 grid, and DailyPlay's Daily Sudoku has one grid a day with notes, hints and a streak and no ads. Sudoku.com runs a Daily Challenge for each date with an archive and trophies.

If you like to pick a level, the newspapers are the place to go. The Washington Post and the Boston Globe each post Easy, Medium and Hard grids free every day, and the Los Angeles Times posts five, from a 6x6 Mini up to Expert. The New York Times and The Times of London have the same idea behind a subscription, The Times with a long numbered series from mild to super fiendish. Greatest Games posts four free grids a day from Easy to Very Hard.

For a short break, LinkedIn's Mini Sudoku is one 6x6 grid a day, and Sudoku Shift chains a 4x4, a 6x6 and a 9x9 against the clock. For something different, Daily Killer Sudoku adds sum cages, Daily Jigsaw Sudoku and Cracked Sudoku replace the 3x3 boxes with irregular shapes, and 3Doku puts the puzzle on a cube. Good Sudoku, from Zach Gage, has three daily puzzles in different styles with leaderboards and hints that teach technique.