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Step 5: Practice Crosshatching Crosshatching is a technique used to identify potential numbers in empty cells. hardest sudoku everswordfish pattern sudoku X-Wing Technique: The X-Wing technique is used when you have two rows or columns that each contain two pairs of identical numbers. The goal is to fill each region with numbers from 1 to 9, ensuring that each row, column, and region contains all the digits. mensa sudoku
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