**secco**- 12:40 15.09.2015
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Why are sudoku puzzles symmetric?

I noticed that sudoku puzzles are always symmetric. Is there a reason for that?

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#### 2 Answers

**hermesesus**- 13:34 15.09.2015
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In fact, there are "unsymmetrical" sudoku puzzles. You can generate random sudoku puzzles online here: http://en.top-sudoku.com/sudoku/choose-a-grid.php You will see that random generated grids are not "symmetric". The symmetry is a choice of the puzzle conceptor!

- 15:55 15.09.2015

Most sudoku puzzles that you see - although not all - contain symmetry. Sepcifically, they tend to contain rotational symmetry such that if the puzzle is rotated 180 degrees it looks the same.