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Step 6: Unique Rectangle and Pointing Pair Techniques These techniques are even more advanced and require a keen eye for patterns: Unique Rectangle Look for four cells in two rows and two columns that each have only two possible numbers. validate sudoku leetcode The Boston Globe, a renowned newspaper, has joined the Sudoku craze by offering its own unique version of the game. best strategy for sudoku Jigsaw Sudoku Jigsaw Sudoku is a variation of the standard Sudoku where some cells are removed from the grid, creating a jigsaw-like pattern. fiendish sudokudkm sudoku for phones Hidden Pair, Hidden Triple, and Hidden Quadruple: These techniques involve identifying numbers that appear twice in a row, column, or subgrid, but are not visible to the naked eye.
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