We can then eliminate these two numbers from all other cells in that column, which gives us the following updated puzzle: Since no other cells in that column can contain either 4 or 9, we can mark these two numbers as a "hidden pair". In the second column, the cells in the second and sixth rows contain only two possible numbers: 4 and 9. Once you have identified a pair of cells with these properties, you can mark the two numbers that appear in those cells as "hidden pairs".įor example, let's say you have the following sudoku puzzle: ![]() These two numbers should be different from each other and not appear in any of the other cells in that row, column, or block. To use the hidden pairs technique, you first need to look for cells in a row, column, or block that contain only two possible numbers. This technique can be especially useful when combined with other techniques, such as the "naked pairs" technique. This means that the two numbers must appear in those cells, and nowhere else in that row, column, or block. Hidden pairs occur when two numbers appear only in two cells in a row, column, or block, and no other numbers can appear in those cells. ![]() One technique that can be useful for solving sudoku puzzles is the "Hidden Pairs" technique. While the rules of the game are simple, solving a sudoku puzzle can be quite challenging, especially for beginners. Sudoku is a popular logic puzzle that challenges players to fill a 9x9 grid with numbers, with the condition that each row, column, and 3x3 box contains every number from 1 to 9 exactly once.
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