Sudoku puzzles started getting popular around 10 years ago, and many web sites offering to play Sudoku online have sprung up. Many of these sites are outdated: they can only be played on a desktop computer, while roughly half the traffic on the Internet nowadays comes from mobile devices (tablets and smartphones). So what does it take to make a Sudoku puzzle play well on mobile devices? SmarterSudoku is a new Sudoku site, that shows how it can be done, as explained here.

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