sudoku online printable free Sudoku is a grid-based puzzle that requires players to fill in numbers from 1 to 9 in such a way that each row, column, and 3x3 subgrid contain all the digits exactly once.
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sudoku online printable free Step 5: Apply the "Swordfish" Technique Similar to the "X-Wing," the "Swordfish" technique is used when three rows or columns have three cells that can only contain the same three numbers. Look for Subsets: Within the empty rectangle, identify any subsets of digits that share a row, column, or box. la times free sudoku Use pencil marks: Keep track of potential numbers for each cell by marking them lightly with a pencil. sudoku redditkiller sudoku solutions Use process of elimination When you cannot place a number in a specific cell, use the process of elimination.
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