Hard sudoku puzzles 1.0

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Printable hard sudoku puzzles.The game of sudoku originated in the eighteenth century. It means 'only one number'. It is basically a number in-line game of filling in numbers, it does not involve any calculation knowledge but needs reasoning and logical thinking to come up with the answers.it is a good way to give the mind some exercises.

VERSION HISTORY

  • Version 1.0 posted on 2009-02-09

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