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Aug 25, 2022 · But how many Sudoku puzzles are out there? Well, according to some estimates, there are as many as 6,670,903,752,021,072,936,960 unique possible Sudoku grids . But when you consider the numerous variations discussed in the previous sections, it becomes clear that the number could be much higher.
There are 6,670,903,752,021,072,936,960 unique possible Sudoku grids. Or, in other words, there are six sextillion six hundred seventy quintillion nine hundred three quadrillion seven hundred fifty-two trillion twenty-one billion seventy-two million nine hundred thirty-six thousand nine hundred sixty possible unique grids.
Apr 15, 2024 · A whopping number! The very first one of these solutions will start, top row, with the numbers 1,2,3,4,5,6,7,8,9 and the very last puzzle will begin with 9,8,7,6,5,4,3,2,1. Sudoku Symmetries. But are all these Sudokus really different? If we rotate a sudoku 90º, isn’t it really just the same sudoku?
According to this page, there are 6,670,903,752,021,072,936,960 different completed 9x9 Sudokus. Of course, there are many different puzzles that can be made from the same completed grid, depending on where the blanks are placed. How do you classify the levels of difficulty? The difficulty of a puzzle is related to the depth of thinking required.
Realistically, no! There are 6,670,903,752,021,072,936,960 possible solvable Sudoku grids that yield a unique result (that’s 6 sextillion, 670 quintillion, 903 quadrillion, 752 trillion, 21 billion, 72 million, 936 thousand, 960 in case you were wondering). That's way more than the number of stars in the universe.
There are Sudoku puzzles with 17 numbers that have only one solution, but no one knows if there are puzzles with only 16 numbers that have a unique solution. As for the second question, there are more than five billion different puzzles.
There is a solvable puzzle with at most 21 clues for every solved grid. The largest minimal puzzle found so far has 40 clues in the 81 cells. Puzzles. Minimum number of givens. Ordinary Sudokus ( proper puzzles) have a unique solution. A minimal Sudoku is a Sudoku from which no clue can be removed leaving it a proper Sudoku.
