The examples given below will illustrate a subcategory of the logic that can be derived from the uniqueness requirement if you discover a scenario that makes it appear to be comparable, carefully consider the effects of leaving the Sudoku in an invalid state. If a Sudoku does have a solution that is not unique, we can replace the numbers but still have a correct Sudoku with no duplicates by highlighting various rectangles that share sets of rows, sets of columns, and two blocks. We are still unable to create an object where this rule is violated because each Logic puzzle should have a unique solution. The term Unique derives from the rectangle formed from two locked combinations. Image Source: What is unique rectangle sudoku?Ī more advanced technique is Unique Rectangles. The unique rectangle sudoku adds more strategy and challenges to the traditional sudoku puzzle, but it can be solved using the same logic as other sudokus. It’s possible to create unique rectangle sudoku with 16 unique cells on each side. The Unique Rectangle Sudoku follows the same rules as your standard sudoku, but instead of a 3×3 grid, you have two 3×2 grids divided by one row and one column. The main difference between the traditional sudoku and the unique rectangle sudoku is that in the unique rectangle sudoku, no number can appear more than once in each row or column.īecause of this difference, this unique rectangle sudoku puzzle can present new challenges to Sudoku veterans who may be looking for a new challenge to tackle every day when they sit down to solve their favorite puzzles online. The unique rectangle sudoku puzzle has proven to be intriguing and popular because it presents solvers with an alternative way of approaching the classic Sudoku puzzle.
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