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Free online brain games



Sudoku

Sudoku is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9x9 grid so that each column, each row, and each of the nine 3x3 boxes (also called blocks or regions) contains the digits from 1 to 9 only one time each. The puzzle setter provides a partially completed grid.
To fill a cell, click it, and then click a red button above the grid.

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