Each Sudoku is already filled in, but you have to move the tiles until you have a correct Sudoku. The Sudoku must then be solved through all 9 layers.
To solve the Sudoku puzzle, each number can only appear once in each column. Likewise, each digit may appear only once in each row. The same principle applies to every tile through all 9 layers.
To solve the Sudoku puzzle, each number can only appear once in each column. Likewise, each digit may appear only once in each row. The same principle applies to every tile through all 9 layers.
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