Just keep trying different techniques and you will eventually find the solution! Don't get frustrated if it takes you a while to solve the puzzle. Remember, sudoku is a game of logic and patience. Using "crosshatching" (eliminating possibilities by examining the intersections of rows and columns).Looking for "hidden pairs" (two numbers that can only go in two specific cells in the same row, column, or box).Looking for "naked pairs" (two cells in the same row, column, or box that contain only the same two numbers as possibilities).If you get stuck, try using the following techniques:.Repeat steps 1-3 until the puzzle is solved, or until you reach a point where you cannot make any more progress using these methods.If a cell can only contain one number, and that number must go in that cell, then all other cells in the same row, column, and box can be eliminated as possibilities for that number. If there is only one cell in a row, column, or box that can hold a specific number, then that cell must contain that number. Look for rows, columns, and 3x3 boxes that contain only one possible cell for a particular number.If a cell can only be filled with one number, then it must be that number.
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