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Shortcuts: cheat at sudoku with Google Goggles
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OK, this isn’t strictly a shortcut — it is closer to cheating — but it could save you a bunch of time, all the same.
Google Goggles is a fascinating app that gets better all the time. It can create a new Google search based on what it sees through the camera on your smartphone. And, if you point it at an unfinished sudoku puzzle, it might beat you to the finished product.