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Step 3: Fill in the Numbers Attempt to fill in the empty cells with the possible numbers you have identified. world's toughest sudoku Backtracking : If you find yourself stuck, and no logical deduction can lead to a solution, use backtracking. sudoku books targetsudoku solve methods However, Samurai Sudoku introduces the following rules: The five large 5x5 grids in the center of the puzzle are known as "Samurai zones." Each zone must be filled with numbers from 1 to 25, with the same rules applying as the smaller 3x3 sub-grids. Your task is to fill in the grid with numbers from 1 to 9 and letters from A to Z, following the rules of Sudoku and crossword puzzles. sudoku puzzle print
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