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printable hard sudoku The objective is to fill the grid with numbers 1 to 9, ensuring that each row, column, and subgrid contains all the numbers from 1 to 9. The website offers a range of puzzles, and the solver provides hints and solutions at the click of a button. 24.7 sudoku experteasy sudoku puzzle books Utilize the Swordfish Strategy: Similar to the X-Wing strategy, the Swordfish technique involves identifying pairs of numbers that appear twice in rows or columns.
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