6/22/2023 0 Comments Nytimes sudoku hardReason is simple: With more number of cells filled up, cell digit possibilities get shorter and getting them easier. This is important.ĭigit possibilities for empty cells are enumerated ONLY WHEN NECESSARY.įor example, if you get a useful pattern and a hit after enumerating possible digits for just a few cells, continue exploring the hit to get further hits leaving enumeration behind for the time being.
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