Sudoku - hardest number puzzle brain game 1 through 9

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Google Gadgets > Sudoku > [ HARDEST ] < or go to: Easiest, Easy, Medium, or the Hard game page

These games and puzzles are good clean fun for the whole family to enjoy. Play hard & have fun! :-)
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The rules of Sudoku are surprisingly simple. Just Count to Nine! ( get step-by-step instructions here )
Every column, row, and 3×3 square must contain the numbers 1 through 9 exactly once.
Every Sudoku puzzle has exactly 1 solution that can be solved logically without guessing.

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