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britannica sudoku Use Advanced Strategies When you've mastered the basic strategies, you can try advanced strategies to solve difficult Sudoku puzzles: X-Wing: If two rows or columns have two cells with the same two numbers, and those two numbers appear in only those two rows or columns, the other two cells in those rows or columns must have those two numbers.

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britannica sudoku Sudoku is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 subgrids contain all of the digits from 1 to 9. chicago tribune sudoku Sudoku variants like Killer Sudoku, Jigsaw Sudoku, and Sudoku-X provide additional challenges for players looking for something different from the classic version. four by four sudoku There are several difficulty levels in Sudoku, ranging from easy for beginners to expert for seasoned players. Solving techniques include scanning, cross-hatching, and identifying candidate numbers.

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