One Sudoku - one day, one sudoku

Today sudoku

Difficulty: hard (3 points)

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How does it work?

There is a new sudoku every day on this site. If you solve it, you (and your city and country) will get 1, 2 or 3 points.

Each day when you do not solve the sudoku, you will loose 1 point (but not your city/country).

When you have less than -10 points, your account will be blocked.