nyt sudoku hard By identifying an X-Wing pattern, you can eliminate the numbers from the other cells in the rows or columns, making it easier to solve the puzzle. Example of a Forcing Chain: Let's say we have the following grid: 8 3 _ | _ 6 _ | _ 7 9 _ 2 _ | 7 _ _ | 5 _ _ _ 6 _ | _ _ _ | _ 1 _ --------------------- _ 9 _ | _ _ _ | _ 8 _ _ 5 _ | _ 3 _ | _ _ _ 2 _ _ | _ _ _ | _ 4 _ --------------------- In this grid, we can identify a single chain involving the numbers 1 and 7 in row 3: Cell R3C2 has candidates 1 and 7. andrew stuart sudoku
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nyt sudoku hard 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. nyt games 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. largest sudoku To solve a Sudoku puzzle, one must look for cells where only one number is possible, or rows/columns/blocks where a specific number has only one possible placement.
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