What is the uniqueness rule in sudoku?
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Answer:
As an application one has the Uniqueness Argument: Whenever one has a nonempty set of initially open cells, and two candidates at each of those cells, such that among these candidates each value occurs zero or two times in each row, column and block, then the actual solution differs in at least one cell from both ...
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How many unique sudoku puzzles are possible?
Answer: There are exactly 6, 670, 903, 752, 021, 072, 936, 960 possible solutions to Sudoku (about 10^21) . That's far more than can be checked in a reasonable period of time.
2024-03-14 11:36:20
What is the l rule in sudoku?
Answer: The L pattern exists when there is a wall that has one populated cell adjacent to it. The wall and the adjacent cell must be in the same box.
2024-02-09 05:54:20
What is sudoku uniqueness controversy?
Answer: Uniqueness in Sudoku
The problem is, that uniqueness in published sudokus is not part of the Sudoku rule itself ("any row, column, and block must contain the digits 1 through 9"). This has led to a very heated argument, whether Uniqueness Techniques are valid or not (see Uniqueness Controversy at Sudopedia).
2024-02-07 17:17:05
Is there a diagonal rule in sudoku?
Answer: The "Sudoku X" puzzle is like the standard puzzle, with an extra requirement: the two long diagonals of the board must also contain each digit from 1 to 9 exactly once.
2024-01-02 10:40:02
What is the rule of pairs in sudoku?
Answer: "Pointing pairs" applies when a Note is present twice in a block and this Note also belongs to the same row or column. This means that the Note must be the solution for one of the two cells in the block. So, you can eliminate this Note from any other cells in the row or column.
2023-04-23 12:13:49