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Sudoku is a logic puzzle game that is very popular.

A Sudoku puzzle consists of a grid of numbers that must be placed in a 9 × 9 square frame, with the exception that no more than two of the same number can be in the same square.

This rule is called the "sudoku rule."

A Sudoku puzzle is usually solved by searching for a number in the grid that does not appear twice in the same row, column, and box.

There are more than 10,000 puzzles to play, and the puzzles are updated daily.

Sudoku is a free puzzle game for beginners to advanced players.