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How many possible sudoku solutions are there?

Rodney Fox

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Ralph Lopez on April 12, 2020

Any Sudoku puzzle has only one solution. This is so long as the puzzle already comes with at least 17 digits already placed on the grid. If there are less than 17 digits, then the puzzle has more than one possible solution, and therefore can not be resolved properly.The total number of possible combinations of digits in a standard sudoku grid is 6,670,903,752,021,072,936,960. However, it can be argued that many of these combinations may be the same as another, only backwards or rotated. Factoring in all logical duplicates, the number of possible combinations drops to 3,359,232. This is essentially the total number of possible sudoku puzzles.

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