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The objective is to fill the grid with digits so that each column, each row, and each of the nine 3x3 subgrids that compose the grid (also called "boxes", "blocks", or "regions") contain all of the digits from 1 to 9. online sudoku for kidswhere is sudoku from Utilize X-Wing and Swordfish Techniques When you have two rows or columns with two cells each that can only contain two specific numbers, and these numbers are the only ones in their respective rows or columns, you've found an X-Wing or Swordfish pattern. oregon live sudoku Solve the puzzle: Continue solving the puzzle using the pencil marks method and other Sudoku-solving techniques until all cells are filled.
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online sudoku for kids Common Sudoku Mistakes and How to Avoid Them
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