Sudoku is a puzzle with a grid containing nine large blocks. Each block is divided into its own matrix of nine cells. The rules for solving Sudoku puzzles are very simple: each row, column and block must contain one of the numbers from "1" to "9". No number may appear more than once in any row, column, or block. When you've filled the entire grid, the puzzle is solved.

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Daily Challenge

Now you can solve Sudoku puzzles and see how your score compares to others solving the same puzzles. Each day (North American East Coast Time), a new puzzle will be available for three different difficulty levels. Your score will be recorded so that you can rate yourself against your friends and others. When solving the puzzle, all the solve aids (including checking your input) will not be available.

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Watch the pros solve puzzles - replay winning games from Sudoku Points.

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