Can you solve it? Sandwich sudoku - a new puzzle goes viral

Sharer: Science|The-Guardian May 5, 2019 at 10:10 pm

Link Share :https://www.theguardian.com/science/2019/may/06/can-you-solve-it-sandwich-sudoku-a-new-puzzle-goes-viral - via RSS

Sudoku variant that mixes logic and arithmetic is an online hit

A new type of Sudoku is whetting the appetites of puzzle fans.

Sandwich sudoku follows the same rules of sudoku but includes extra clues outside the grid like this:

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